diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000..d56ec1c
Binary files /dev/null and b/.DS_Store differ
diff --git a/.babelrc b/.babelrc
deleted file mode 100644
index 02f08fb..0000000
--- a/.babelrc
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-  "presets": [
-    "es2015"
-  ]
-}
\ No newline at end of file
diff --git a/.eslintrc b/.eslintrc
deleted file mode 100644
index 3710412..0000000
--- a/.eslintrc
+++ /dev/null
@@ -1,19 +0,0 @@
-env:
-  node: true
-  shared-node-browser: true
-extends: 'eslint:recommended'
-rules:
-  indent:
-    - warn
-    - 2
-  quotes:
-    - error
-    - single
-  semi:
-    - error
-    - always
-  no-console: 0
-  no-unused-vars:
-    - warn
-plugins:
-  - standard
\ No newline at end of file
diff --git a/.git-crypt/.gitattributes b/.git-crypt/.gitattributes
deleted file mode 100644
index 17ef601..0000000
--- a/.git-crypt/.gitattributes
+++ /dev/null
@@ -1,3 +0,0 @@
-# Do not edit this file.  To specify the files to encrypt, create your own
-# .gitattributes file in the directory where your files are.
-* !filter !diff
diff --git a/.git-crypt/keys/default/0/1591167A122430088FED00F1F037BB2CCA188AFB.gpg b/.git-crypt/keys/default/0/1591167A122430088FED00F1F037BB2CCA188AFB.gpg
deleted file mode 100644
index d3a096c..0000000
Binary files a/.git-crypt/keys/default/0/1591167A122430088FED00F1F037BB2CCA188AFB.gpg and /dev/null differ
diff --git a/.git-crypt/keys/default/0/21FF076F9BD2FBCC7350F8927BE552533AB6D4E2.gpg b/.git-crypt/keys/default/0/21FF076F9BD2FBCC7350F8927BE552533AB6D4E2.gpg
deleted file mode 100644
index ea37094..0000000
--- a/.git-crypt/keys/default/0/21FF076F9BD2FBCC7350F8927BE552533AB6D4E2.gpg
+++ /dev/null
@@ -1 +0,0 @@
-�
l��_w�"
�5K���{�/H����Q�7�C4��q�}&m�4��������^��9df����͒
����/�;��Y(�U��2�V��s�����aP����.�L��F%	��=��}\�U�ֿ��u�]K��7jkn-��C��}"e��L:��H�t�<���f6M����1�BZ�n�_�v��Wڣ����VWM�۴h�aҡ���c�ҁu��o��䎸Sפx��0�
�i���Z2�������O���pWI3x
�
���
v+�6۸5�OP��1F	�$t4�m���2�=KC��w�l�E�RS��O�>OyiW�OdH�,�B�;PmZz�HY���Iڶ�������������kg#���OU[����8f�LeY��(G���3����T^��o)�l}|ӕo��W�V�jՃ]�F���#3d�O�ݗ����0�8|E�:�XK
\ No newline at end of file
diff --git a/.git-crypt/keys/default/0/3A745E3CABCEFA47CEE4E3EE8A98905C7C554364.gpg b/.git-crypt/keys/default/0/3A745E3CABCEFA47CEE4E3EE8A98905C7C554364.gpg
deleted file mode 100644
index 0cbab78..0000000
Binary files a/.git-crypt/keys/default/0/3A745E3CABCEFA47CEE4E3EE8A98905C7C554364.gpg and /dev/null differ
diff --git a/.git-crypt/keys/default/0/E61F81C8BC266CD50E818200F1DB1E2B960F4327.gpg b/.git-crypt/keys/default/0/E61F81C8BC266CD50E818200F1DB1E2B960F4327.gpg
deleted file mode 100644
index 7629ecf..0000000
Binary files a/.git-crypt/keys/default/0/E61F81C8BC266CD50E818200F1DB1E2B960F4327.gpg and /dev/null differ
diff --git a/.gitattributes b/.gitattributes
deleted file mode 100644
index 17e9fcf..0000000
--- a/.gitattributes
+++ /dev/null
@@ -1,9 +0,0 @@
-# Default for those who don't have core.autocrlf set
-* text=auto
-
-src/**/*.*         filter=git-crypt diff=git-crypt
-.gulp/**/*.*       filter=git-crypt diff=git-crypt
-extensions/**/*.ts filter=git-crypt diff=git-crypt
-
-# Fix for GitHub Linguist to avoid treating this project as C++ repo
-test/*             linguist-vendored
diff --git a/.github/ISSUE_TEMPLATE.md b/.github/ISSUE_TEMPLATE.md
deleted file mode 100644
index 62bad1c..0000000
--- a/.github/ISSUE_TEMPLATE.md
+++ /dev/null
@@ -1,2 +0,0 @@
-<!-- Love vsc-material-theme? Please consider supporting our collective:
-👉  https://opencollective.com/vsc-material-theme/donate -->
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
deleted file mode 100644
index 2287f0c..0000000
--- a/.gitignore
+++ /dev/null
@@ -1,10 +0,0 @@
-*.log
-*.~lock
-*.js
-**/*.map
-*.gulp/**.js
-dist/
-node_modules/
-.DS_Store
-/themes
-/icons
diff --git a/.gulp/consts/log.ts b/.gulp/consts/log.ts
deleted file mode 100644
index b9f0c07..0000000
Binary files a/.gulp/consts/log.ts and /dev/null differ
diff --git a/.gulp/index.ts b/.gulp/index.ts
deleted file mode 100644
index 0be9432..0000000
Binary files a/.gulp/index.ts and /dev/null differ
diff --git a/.gulp/interfaces/iicon.ts b/.gulp/interfaces/iicon.ts
deleted file mode 100644
index d61122d..0000000
Binary files a/.gulp/interfaces/iicon.ts and /dev/null differ
diff --git a/.gulp/interfaces/itheme-icons-accents.ts b/.gulp/interfaces/itheme-icons-accents.ts
deleted file mode 100644
index b52217e..0000000
Binary files a/.gulp/interfaces/itheme-icons-accents.ts and /dev/null differ
diff --git a/.gulp/interfaces/itheme-icons-item.ts b/.gulp/interfaces/itheme-icons-item.ts
deleted file mode 100644
index de671ba..0000000
Binary files a/.gulp/interfaces/itheme-icons-item.ts and /dev/null differ
diff --git a/.gulp/interfaces/itheme-icons-variants.ts b/.gulp/interfaces/itheme-icons-variants.ts
deleted file mode 100644
index e5c2e36..0000000
Binary files a/.gulp/interfaces/itheme-icons-variants.ts and /dev/null differ
diff --git a/.gulp/interfaces/itheme-variant.ts b/.gulp/interfaces/itheme-variant.ts
deleted file mode 100644
index e9c7c4a..0000000
Binary files a/.gulp/interfaces/itheme-variant.ts and /dev/null differ
diff --git a/.gulp/tasks/changelog-title.ts b/.gulp/tasks/changelog-title.ts
deleted file mode 100644
index ad86e36..0000000
Binary files a/.gulp/tasks/changelog-title.ts and /dev/null differ
diff --git a/.gulp/tasks/icons-accents.ts b/.gulp/tasks/icons-accents.ts
deleted file mode 100644
index cc7b0f8..0000000
Binary files a/.gulp/tasks/icons-accents.ts and /dev/null differ
diff --git a/.gulp/tasks/icons-variants.ts b/.gulp/tasks/icons-variants.ts
deleted file mode 100644
index 751269f..0000000
Binary files a/.gulp/tasks/icons-variants.ts and /dev/null differ
diff --git a/.gulp/tasks/icons.ts b/.gulp/tasks/icons.ts
deleted file mode 100644
index 3d46697..0000000
Binary files a/.gulp/tasks/icons.ts and /dev/null differ
diff --git a/.gulp/tasks/themes.ts b/.gulp/tasks/themes.ts
deleted file mode 100644
index 65f161b..0000000
Binary files a/.gulp/tasks/themes.ts and /dev/null differ
diff --git a/.gulp/tasks/watcher.ts b/.gulp/tasks/watcher.ts
deleted file mode 100644
index 2a98c28..0000000
Binary files a/.gulp/tasks/watcher.ts and /dev/null differ
diff --git a/.npmrc b/.npmrc
deleted file mode 100644
index aea17fd..0000000
--- a/.npmrc
+++ /dev/null
@@ -1,4 +0,0 @@
-git-tag-version = false
-tag-version-prefix =
-save-exact = true
-progress = true
\ No newline at end of file
diff --git a/.vscode/launch.json b/.vscode/launch.json
deleted file mode 100644
index acc9440..0000000
--- a/.vscode/launch.json
+++ /dev/null
@@ -1,56 +0,0 @@
-{
-  // Use IntelliSense to learn about possible Node.js debug attributes.
-  // Hover to view descriptions of existing attributes.
-  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
-  "version": "0.2.0",
-  "configurations": [
-    {
-      "type": "node",
-      "request": "launch",
-      "name": "Gulp build-icons-variants",
-      "program": "${workspaceRoot}/node_modules/gulp/bin/gulp.js",
-      "args": [
-        "build:icons.variants"
-      ]
-    },
-    {
-      "type": "node",
-      "request": "launch",
-      "name": "Gulp build-icons",
-      "program": "${workspaceRoot}/node_modules/gulp/bin/gulp.js",
-      "args": [
-        "build:icons.accents"
-      ]
-    },
-    {
-      "name": "Launch Extension",
-      "type": "extensionHost",
-      "request": "launch",
-      "runtimeExecutable": "${execPath}",
-      "args": [
-        "--extensionDevelopmentPath=${workspaceRoot}"
-      ],
-      "stopOnEntry": false,
-      "sourceMaps": true,
-      "outFiles": [
-        "${workspaceRoot}/out/src/**/*.js"
-      ]
-    },
-    {
-      "name": "Launch Tests",
-      "type": "extensionHost",
-      "request": "launch",
-      "runtimeExecutable": "${execPath}",
-      "args": [
-        "--extensionDevelopmentPath=${workspaceRoot}",
-        "--extensionTestsPath=${workspaceRoot}/out/test"
-      ],
-      "stopOnEntry": false,
-      "sourceMaps": true,
-      "outFiles": [
-        "${workspaceRoot}/out/test/**/*.js"
-      ],
-      "preLaunchTask": "npm"
-    }
-  ]
-}
\ No newline at end of file
diff --git a/.vscode/settings.json b/.vscode/settings.json
deleted file mode 100644
index e3fc186..0000000
--- a/.vscode/settings.json
+++ /dev/null
@@ -1,29 +0,0 @@
-{
-  "editor.tabSize": 2,
-  "editor.insertSpaces": true,
-  "files.exclude": {
-    "**/.git": true,
-    ".git-crypt": true,
-    "**/.svn": true,
-    "**/.hg": true,
-    "**/CVS": true,
-    "**/.DS_Store": true,
-    "**/*.js": {
-      "when": "$(basename).ts"
-    },
-    "**/*.js.map": true
-  },
-  "files.associations": {
-    "*.template": "json"
-  },
-  "html.format.preserveNewLines": true,
-  "files.trimTrailingWhitespace": true,
-  "[markdown]": {
-    "diffEditor.ignoreTrimWhitespace": false,
-    "editor.tabSize": 4,
-    "editor.wordWrap": "on",
-    "editor.quickSuggestions": false
-  },
-  "gulp.autoDetect": "off",
-  "npm.autoDetect": "off"
-}
\ No newline at end of file
diff --git a/.vscode/tasks.json b/.vscode/tasks.json
deleted file mode 100644
index 97c75a8..0000000
--- a/.vscode/tasks.json
+++ /dev/null
@@ -1,89 +0,0 @@
-// Available variables which can be used inside of strings.
-// ${workspaceRoot}: the root folder of the team
-// ${file}: the current opened file
-// ${fileBasename}: the current opened file's basename
-// ${fileDirname}: the current opened file's dirname
-// ${fileExtname}: the current opened file's extension
-// ${cwd}: the current working directory of the spawned process
-// A task runner that calls a custom npm script that compiles the extension.
-{
-  "version": "2.0.0",
-  // tasks list (build, build-theme, semver etc)
-  "tasks": [
-    {
-      "args": [
-        "run",
-        "build"
-      ],
-      "command": "npm",
-      "dependsOn": "tsc",
-      "taskName": "build",
-      "group": {
-        "kind": "build",
-        "isDefault": true
-      },
-      "problemMatcher": []
-    },
-    {
-      "linux": {
-        "args": [
-          ".",
-          "-name",
-          "\"*.js\"",
-          "-not",
-          "-path",
-          "\"./node_modules/*\"",
-          "-not",
-          "-path",
-          "\"./src/*\"",
-          "-not",
-          "-path",
-          "\"./test/*\"",
-          "-type",
-          "f",
-          "-delete"
-        ],
-        "command": "find"
-      },
-      "osx": {
-        "args": [
-          ".",
-          "-name",
-          "\"*.js\"",
-          "-not",
-          "-path",
-          "\"./node_modules/*\"",
-          "-not",
-          "-path",
-          "\"./src/*\"",
-          "-not",
-          "-path",
-          "\"./test/*\"",
-          "-type",
-          "f",
-          "-delete"
-        ],
-        "command": "find"
-      },
-      "command": "",
-      "taskName": "clean project"
-    },
-    {
-      "args": [
-        "run",
-        "changelog"
-      ],
-      "command": "npm",
-      "taskName": "changelog"
-    },
-    {
-      "args": [
-        "-p",
-        "."
-      ],
-      "command": "tsc",
-      "dependsOn": "clean project",
-      "taskName": "tsc"
-    }
-  ]
-}
\ No newline at end of file
diff --git a/.vscodeignore b/.vscodeignore
deleted file mode 100644
index 420a7ae..0000000
--- a/.vscodeignore
+++ /dev/null
@@ -1,17 +0,0 @@
-*.log
-*.ts
-**/*.map
-.github
-.gitignore
-.gulp
-.vscode/**
-assets/
-gulpfile.babel.ts
-node_modules
-out/test/**
-src/**
-test/**
-tsconfig.json
-typings/**
-vsc-extension-quickstart.md
-yarn.lock
\ No newline at end of file
diff --git a/.yarnrc b/.yarnrc
deleted file mode 100644
index 1b2af90..0000000
--- a/.yarnrc
+++ /dev/null
@@ -1,2 +0,0 @@
-save-exact true
-save-prefix false
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
deleted file mode 100644
index d6c4a4e..0000000
--- a/CHANGELOG.md
+++ /dev/null
@@ -1,352 +0,0 @@
-# Material Theme Changelog
-
-All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
-
-<a name="1.6.0"></a>
-# [1.6.0](https://github.com/equinusocio/vsc-material-theme/compare/v1.5.1...v1.6.0) (2018-04-15)
-
-
-### Bug Fixes
-
-* Add babel icon to .babelrc.json files ([41fe77c](https://github.com/equinusocio/vsc-material-theme/commit/41fe77c)), closes [#154](https://github.com/equinusocio/vsc-material-theme/issues/154)
-
-
-### Features
-
-* Add .gitlab-ci.yml file icon ([5b5c9ec](https://github.com/equinusocio/vsc-material-theme/commit/5b5c9ec)), closes [#155](https://github.com/equinusocio/vsc-material-theme/issues/155)
-
-
-
-<a name="1.5.1"></a>
-## [1.5.1](https://github.com/equinusocio/vsc-material-theme/compare/v1.5.0...v1.5.1) (2018-03-10)
-
-
-### Bug Fixes
-
-* Fix notifications background. Close [#143](https://github.com/equinusocio/vsc-material-theme/issues/143) ([8981088](https://github.com/equinusocio/vsc-material-theme/commit/8981088)), closes [#142](https://github.com/equinusocio/vsc-material-theme/issues/142)
-
-
-
-<a name="1.5.0"></a>
-# [1.5.0](https://github.com/equinusocio/vsc-material-theme/compare/v1.4.0...v1.5.0) (2018-03-08)
-
-
-### Bug Fixes
-
-* Add support for the new notifications UX ([008bac1](https://github.com/equinusocio/vsc-material-theme/commit/008bac1))
-
-
-### Features
-
-* Highlight line number on selected line ([cf69a74](https://github.com/equinusocio/vsc-material-theme/commit/cf69a74))
-
-
-
-<a name="1.4.0"></a>
-# [1.4.0](https://github.com/equinusocio/vsc-material-theme/compare/v1.3.0...v1.4.0) (2018-02-19)
-
-
-### Bug Fixes
-
-* Fix constants color in php language ([444cf9a](https://github.com/equinusocio/vsc-material-theme/commit/444cf9a)), closes [#138](https://github.com/equinusocio/vsc-material-theme/issues/138)
-* Fix input validation colors contrast ([30df0a6](https://github.com/equinusocio/vsc-material-theme/commit/30df0a6))
-
-
-### Features
-
-* Add a subtle highlight  on tab hover ([405000e](https://github.com/equinusocio/vsc-material-theme/commit/405000e))
-
-
-
-<a name="1.4.3"></a>
-## [1.4.3](https://github.com/equinusocio/vsc-material-theme/compare/v1.4.0...v1.4.3) (2018-02-19)
-
-
-
-<a name="1.4.0"></a>
-# [1.4.0](https://github.com/equinusocio/vsc-material-theme/compare/v1.3.0...v1.4.0) (2018-02-19)
-
-
-### Bug Fixes
-
-* Fix constants color in php language ([444cf9a](https://github.com/equinusocio/vsc-material-theme/commit/444cf9a)), closes [#138](https://github.com/equinusocio/vsc-material-theme/issues/138)
-* Fix input validation colors contrast ([30df0a6](https://github.com/equinusocio/vsc-material-theme/commit/30df0a6))
-
-
-### Features
-
-* Add a subtle highlight  on tab hover ([405000e](https://github.com/equinusocio/vsc-material-theme/commit/405000e))
-
-
-
-<a name="1.3.0"></a>
-# [1.3.0](https://github.com/equinusocio/vsc-material-theme/compare/v1.2.0...v1.3.0) (2018-01-21)
-
-
-### Bug Fixes
-
-* Fix editor rule color ([2732da4](https://github.com/equinusocio/vsc-material-theme/commit/2732da4))
-* Fix highlight backgrounds in PeekView ([b66e88e](https://github.com/equinusocio/vsc-material-theme/commit/b66e88e))
-* Temporary fix to git edited file background when list is inactive ([6b1925e](https://github.com/equinusocio/vsc-material-theme/commit/6b1925e))
-* Update main field of package.json ([#130](https://github.com/equinusocio/vsc-material-theme/issues/130)) ([40dd529](https://github.com/equinusocio/vsc-material-theme/commit/40dd529))
-
-
-### Features
-
-* Add gulp icon to gulp-config.js files ([83c058f](https://github.com/equinusocio/vsc-material-theme/commit/83c058f)), closes [#128](https://github.com/equinusocio/vsc-material-theme/issues/128)
-* Add zephyr file icon ([9e64343](https://github.com/equinusocio/vsc-material-theme/commit/9e64343)), closes [#124](https://github.com/equinusocio/vsc-material-theme/issues/124)
-
-
-
-<a name="1.2.0"></a>
-# [1.2.0](https://github.com/equinusocio/vsc-material-theme/compare/v1.1.2...v1.2.0) (2017-12-29)
-
-
-### Features
-
-* Add ci folder icon ([a2ba7f8](https://github.com/equinusocio/vsc-material-theme/commit/a2ba7f8)), closes [#119](https://github.com/equinusocio/vsc-material-theme/issues/119)
-* Add laravel blade file icon ([f7070f4](https://github.com/equinusocio/vsc-material-theme/commit/f7070f4)), closes [#114](https://github.com/equinusocio/vsc-material-theme/issues/114)
-* Add reason (.re, .rei) file icon ([384d8d2](https://github.com/equinusocio/vsc-material-theme/commit/384d8d2))
-
-
-
-<a name="1.1.2"></a>
-## [1.1.2](https://github.com/equinusocio/vsc-material-theme/compare/v1.1.0...v1.1.2) (2017-11-14)
-
-
-### Bug Fixes
-
-* Add dist folder icon ([a6600d2](https://github.com/equinusocio/vsc-material-theme/commit/a6600d2))
-* Add test folder icon ([0a73ce4](https://github.com/equinusocio/vsc-material-theme/commit/0a73ce4))
-* Improve markdown highlight ([dc9a6fa](https://github.com/equinusocio/vsc-material-theme/commit/dc9a6fa)), closes [#113](https://github.com/equinusocio/vsc-material-theme/issues/113)
-* Improve src folder icon ([e06b881](https://github.com/equinusocio/vsc-material-theme/commit/e06b881))
-* New bower_components folder icon ([adcb304](https://github.com/equinusocio/vsc-material-theme/commit/adcb304))
-* Update .git folder icon ([2f37966](https://github.com/equinusocio/vsc-material-theme/commit/2f37966))
-* Update .github folder icon ([d371804](https://github.com/equinusocio/vsc-material-theme/commit/d371804))
-* Update package-lock.json and yarn.lock file icons ([7136700](https://github.com/equinusocio/vsc-material-theme/commit/7136700)), closes [#108](https://github.com/equinusocio/vsc-material-theme/issues/108)
-
-
-### Features
-
-* Add Rollup js file icon ([5755813](https://github.com/equinusocio/vsc-material-theme/commit/5755813))
-
-
-
-<a name="1.1.0"></a>
-# [1.1.0](https://github.com/equinusocio/vsc-material-theme/compare/v1.0.5...v1.1.0) (2017-11-04)
-
-
-### Bug Fixes
-
-* Add babel icon to .babelrc files ([f2a64ab](https://github.com/equinusocio/vsc-material-theme/commit/f2a64ab)), closes [#101](https://github.com/equinusocio/vsc-material-theme/issues/101)
-* Add postcss icon to .pcss files ([9eac9c4](https://github.com/equinusocio/vsc-material-theme/commit/9eac9c4)), closes [#107](https://github.com/equinusocio/vsc-material-theme/issues/107)
-* Minor UI fixes ([65a18e8](https://github.com/equinusocio/vsc-material-theme/commit/65a18e8))
-
-
-### Features
-
-* Add set italic style for keyword operators ([ea9b755](https://github.com/equinusocio/vsc-material-theme/commit/ea9b755)), closes [#99](https://github.com/equinusocio/vsc-material-theme/issues/99)
-* Add sidebar git colors support  ([0cf2007](https://github.com/equinusocio/vsc-material-theme/commit/0cf2007))
-* New folder icons ([2dfbaaa](https://github.com/equinusocio/vsc-material-theme/commit/2dfbaaa))
-* New High Contrast theme variants. ([79d68b3](https://github.com/equinusocio/vsc-material-theme/commit/79d68b3))
-* Remove arrow icons beside folders in explorer view ([28006e5](https://github.com/equinusocio/vsc-material-theme/commit/28006e5))
-
-
-
-<a name="1.0.5"></a>
-## [1.0.5](https://github.com/equinusocio/vsc-material-theme/compare/v1.0.4...v1.0.5) (2017-10-12)
-
-
-### Bug Fixes
-
-* Fix show changelog command ([370a4d9](https://github.com/equinusocio/vsc-material-theme/commit/370a4d9))
-* Improve tab inactive foreground contrast ([c3d0b82](https://github.com/equinusocio/vsc-material-theme/commit/c3d0b82))
-
-
-### Features
-
-* Add .asp, .aspx and .ascx file icon ([f7d4af0](https://github.com/equinusocio/vsc-material-theme/commit/f7d4af0)), closes [#96](https://github.com/equinusocio/vsc-material-theme/issues/96)
-* Add .mjs file icon ([605b8bf](https://github.com/equinusocio/vsc-material-theme/commit/605b8bf)), closes [#93](https://github.com/equinusocio/vsc-material-theme/issues/93)
-* Add .yarnrc and .npmrc file icon ([f715cd0](https://github.com/equinusocio/vsc-material-theme/commit/f715cd0))
-* Add colors for sidebar git.untracked and git.modified files ([3f1077d](https://github.com/equinusocio/vsc-material-theme/commit/3f1077d))
-
-
-
-<a name="1.0.3"></a>
-## [1.0.3](https://github.com/equinusocio/vsc-material-theme/compare/v1.0.2...v1.0.3) (2017-09-27)
-
-
-### Bug Fixes
-
-* Fix brackets color (punctuation.class...). Fix [#76](https://github.com/equinusocio/vsc-material-theme/issues/76) ([02d20b7](https://github.com/equinusocio/vsc-material-theme/commit/02d20b7))
-* Fix wrong gutter indicator for add line. Close 89 ([83df9f9](https://github.com/equinusocio/vsc-material-theme/commit/83df9f9))
-* Update gutter line colors. Fix [#79](https://github.com/equinusocio/vsc-material-theme/issues/79) ([0298a59](https://github.com/equinusocio/vsc-material-theme/commit/0298a59))
-
-
-### Features
-
-* Add tab active bottom border ([5bd1934](https://github.com/equinusocio/vsc-material-theme/commit/5bd1934)), closes [#88](https://github.com/equinusocio/vsc-material-theme/issues/88)
-* Adds "show changelog" command. ([038ded7](https://github.com/equinusocio/vsc-material-theme/commit/038ded7))
-
-
-
-<a name="1.0.2"></a>
-## [1.0.2](https://github.com/equinusocio/vsc-material-theme/compare/v1.0.1...v1.0.2) (2017-07-25)
-
-
-### Bug Fixes
-
-* Fix squiggles visibility ([0900c30](https://github.com/equinusocio/vsc-material-theme/commit/0900c30)), closes [#70](https://github.com/equinusocio/vsc-material-theme/issues/70)
-* Fixes an issues with the old settings "materialTheme.cache.workbench.accent". ([6c2ce83](https://github.com/equinusocio/vsc-material-theme/commit/6c2ce83))
-* Fixes an unhandled undefined, which causes theme to break (issue [#69](https://github.com/equinusocio/vsc-material-theme/issues/69)). ([14a471f](https://github.com/equinusocio/vsc-material-theme/commit/14a471f))
-
-
-
-<a name="1.0.1"></a>
-## [1.0.1](https://github.com/equinusocio/vsc-material-theme/compare/v1.0.0...v1.0.1) (2017-07-24)
-
-
-### Bug Fixes
-
-* Add .ex file icon ([b6eb130](https://github.com/equinusocio/vsc-material-theme/commit/b6eb130)), closes [#60](https://github.com/equinusocio/vsc-material-theme/issues/60)
-* Add accent color to progressbar ([4758c45](https://github.com/equinusocio/vsc-material-theme/commit/4758c45))
-* Add squigglies color ([8502a39](https://github.com/equinusocio/vsc-material-theme/commit/8502a39))
-* Fix editor marker navigation color ([16230f2](https://github.com/equinusocio/vsc-material-theme/commit/16230f2))
-* Fix notification bar badge colors ([a3428ab](https://github.com/equinusocio/vsc-material-theme/commit/a3428ab))
-* Fix python special var parameter color ([027b342](https://github.com/equinusocio/vsc-material-theme/commit/027b342)), closes [#57](https://github.com/equinusocio/vsc-material-theme/issues/57)
-* Fix theme variants and settings reload ([ada03ed](https://github.com/equinusocio/vsc-material-theme/commit/ada03ed))
-* Improve workbench theme and colors ([4798102](https://github.com/equinusocio/vsc-material-theme/commit/4798102))
-
-
-
-<a name="1.0.0"></a>
-# [1.0.0](https://github.com/equinusocio/vsc-material-theme/compare/v0.0.17...v1.0.0) (2017-06-19)
-
-
-### Bug Fixes
-
-* Add and update file icons ([ef9abab](https://github.com/equinusocio/vsc-material-theme/commit/ef9abab))
-* Fix inputs placeholder color ([6d5cef6](https://github.com/equinusocio/vsc-material-theme/commit/6d5cef6))
-* Fix tree selected foreground when sidebar is inactive ([351cd20](https://github.com/equinusocio/vsc-material-theme/commit/351cd20))
-* Improve sidebar tree coloring ([4993587](https://github.com/equinusocio/vsc-material-theme/commit/4993587))
-* Style welcome page links ([e873530](https://github.com/equinusocio/vsc-material-theme/commit/e873530))
-
-
-### Features
-
-* adds theme accents config. ([c648ab8](https://github.com/equinusocio/vsc-material-theme/commit/c648ab8))
-* Adds theme changer command ([cb68fdc](https://github.com/equinusocio/vsc-material-theme/commit/cb68fdc))
-
-
-
-<a name="0.0.17"></a>
-## [0.0.17](https://github.com/equinusocio/vsc-material-theme/compare/v0.0.16...v0.0.17) (2017-05-22)
-
-
-### Bug Fixes
-
-* Fix inactive group inactive tab foreground ([2d52311](https://github.com/equinusocio/vsc-material-theme/commit/2d52311)), closes [#47](https://github.com/equinusocio/vsc-material-theme/issues/47)
-* Improve sidebar colorization ([9cf9f34](https://github.com/equinusocio/vsc-material-theme/commit/9cf9f34))
-
-
-### Features
-
-* Add puppet (.pp) file icon ([d2dc180](https://github.com/equinusocio/vsc-material-theme/commit/d2dc180))
-
-
-
-<a name="0.0.16"></a>
-## [0.0.16](https://github.com/equinusocio/vsc-material-theme/compare/v0.0.15...v0.0.16) (2017-05-18)
-
-
-### Bug Fixes
-
-* Fix C file icon ([8a5a331](https://github.com/equinusocio/vsc-material-theme/commit/8a5a331)), closes [#46](https://github.com/equinusocio/vsc-material-theme/issues/46)
-* Fix the waterfall of bleed words ([6d001c4](https://github.com/equinusocio/vsc-material-theme/commit/6d001c4)), closes [#44](https://github.com/equinusocio/vsc-material-theme/issues/44)
-* Fix the waterfall of blooding words ([8b62470](https://github.com/equinusocio/vsc-material-theme/commit/8b62470)), closes [#44](https://github.com/equinusocio/vsc-material-theme/issues/44)
-* Improve tree colors (wip) ([d9a1f2c](https://github.com/equinusocio/vsc-material-theme/commit/d9a1f2c))
-* Panel hover borders ([a83dfcb](https://github.com/equinusocio/vsc-material-theme/commit/a83dfcb))
-
-
-
-<a name="0.0.15"></a>
-## [0.0.15](https://github.com/equinusocio/vsc-material-theme/compare/v0.0.14...v0.0.15) (2017-05-17)
-
-
-
-<a name="0.0.14"></a>
-## [0.0.14](https://github.com/equinusocio/vsc-material-theme/compare/v0.0.13...v0.0.14) (2017-05-16)
-
-
-### Bug Fixes
-
-* Fix bracket match border color ([4f778f1](https://github.com/equinusocio/vsc-material-theme/commit/4f778f1))
-* Fix invalids color highlight ([100397c](https://github.com/equinusocio/vsc-material-theme/commit/100397c)), closes [#40](https://github.com/equinusocio/vsc-material-theme/issues/40)
-* Fix notification bar foreground on Lighter ([c177e46](https://github.com/equinusocio/vsc-material-theme/commit/c177e46)), closes [#34](https://github.com/equinusocio/vsc-material-theme/issues/34)
-* Fix selectionHighlightBackground color ([9578f38](https://github.com/equinusocio/vsc-material-theme/commit/9578f38)), closes [#38](https://github.com/equinusocio/vsc-material-theme/issues/38)
-* improve C# highlight ([c72c314](https://github.com/equinusocio/vsc-material-theme/commit/c72c314)), closes [#26](https://github.com/equinusocio/vsc-material-theme/issues/26)
-* Improve c++ syntax highlight ([1a927d6](https://github.com/equinusocio/vsc-material-theme/commit/1a927d6))
-* Temporary fix buttons background ([f97d06a](https://github.com/equinusocio/vsc-material-theme/commit/f97d06a)), closes [#37](https://github.com/equinusocio/vsc-material-theme/issues/37)
-
-
-
-<a name="0.0.13"></a>
-## [0.0.13](https://github.com/equinusocio/vsc-material-theme/compare/v0.0.12...v0.0.13) (2017-05-10)
-
-
-### Bug Fixes
-
-* Fix statusbar background when no project opened ([d0a7cbc](https://github.com/equinusocio/vsc-material-theme/commit/d0a7cbc)), closes [#27](https://github.com/equinusocio/vsc-material-theme/issues/27)
-* Improve ansi colors (integrated terminal) ([d1fa94f](https://github.com/equinusocio/vsc-material-theme/commit/d1fa94f))
-
-
-### Features
-
-* Add build/dist folder icon ([668db44](https://github.com/equinusocio/vsc-material-theme/commit/668db44)), closes [#6](https://github.com/equinusocio/vsc-material-theme/issues/6)
-* Improve worckbench theme ([caff8ce](https://github.com/equinusocio/vsc-material-theme/commit/caff8ce))
-
-
-
-<a name="0.0.12"></a>
-## [0.0.12](https://github.com/equinusocio/vsc-material-theme/compare/v0.0.8...v0.0.12) (2017-05-04)
-
-
-### Bug Fixes
-
-* Fix folder icon color ([81c03e6](https://github.com/equinusocio/vsc-material-theme/commit/81c03e6))
-* Update workbench theme ([232d1e3](https://github.com/equinusocio/vsc-material-theme/commit/232d1e3))
-
-
-### Features
-
-* Add graphql file icon ([ba18877](https://github.com/equinusocio/vsc-material-theme/commit/ba18877))
-* Improve workbench theme ([c7c8038](https://github.com/equinusocio/vsc-material-theme/commit/c7c8038))
-* Update workbench theme ([6ddfaa9](https://github.com/equinusocio/vsc-material-theme/commit/6ddfaa9))
-
-
-
-<a name="0.0.8"></a>
-## [0.0.8](https://github.com/equinusocio/vsc-material-theme/compare/v0.0.7...v0.0.8) (2017-04-11)
-
-
-### Bug Fixes
-
-* Add bower icon ([3e73e1f](https://github.com/equinusocio/vsc-material-theme/commit/3e73e1f))
-* Fix background color for highlighted searched string ([060d24d](https://github.com/equinusocio/vsc-material-theme/commit/060d24d)), closes [#4](https://github.com/equinusocio/vsc-material-theme/issues/4)
-* fix lighter scheme colors ([2ba1c0d](https://github.com/equinusocio/vsc-material-theme/commit/2ba1c0d))
-* Fix opened folder icon ([40700ca](https://github.com/equinusocio/vsc-material-theme/commit/40700ca)), closes [#1](https://github.com/equinusocio/vsc-material-theme/issues/1)
-* Fix some file and folder icons  ([b927646](https://github.com/equinusocio/vsc-material-theme/commit/b927646))
-* Fix var hover background ([a8fee8c](https://github.com/equinusocio/vsc-material-theme/commit/a8fee8c))
-* Update json icon ([ce30ff7](https://github.com/equinusocio/vsc-material-theme/commit/ce30ff7))
-* Update some file icons ([cf2a1ee](https://github.com/equinusocio/vsc-material-theme/commit/cf2a1ee))
-* **Icons:** Fix .ts and def ts icons ([4c0cf00](https://github.com/equinusocio/vsc-material-theme/commit/4c0cf00)), closes [#10](https://github.com/equinusocio/vsc-material-theme/issues/10)
-
-
-### Features
-
-* Add lighter theme (wip) ([0f7d3c2](https://github.com/equinusocio/vsc-material-theme/commit/0f7d3c2))
-* Add Material Theme icon-theme ([7d3b7bd](https://github.com/equinusocio/vsc-material-theme/commit/7d3b7bd))
-* first beta release ([b4dead1](https://github.com/equinusocio/vsc-material-theme/commit/b4dead1))
-* **Icons:** Add new filetype icons ([5bc8002](https://github.com/equinusocio/vsc-material-theme/commit/5bc8002))
-* **Icons:** Add new icons ([3921218](https://github.com/equinusocio/vsc-material-theme/commit/3921218))
-* first full theme implementation (wip) ([c3c42d4](https://github.com/equinusocio/vsc-material-theme/commit/c3c42d4))
diff --git a/CODE_OF_CONDUCT.md b/CODE_OF_CONDUCT.md
deleted file mode 100644
index 059647c..0000000
--- a/CODE_OF_CONDUCT.md
+++ /dev/null
@@ -1,46 +0,0 @@
-# Contributor Covenant Code of Conduct
-
-## Our Pledge
-
-In the interest of fostering an open and welcoming environment, we as contributors and maintainers pledge to making participation in our project and our community a harassment-free experience for everyone, regardless of age, body size, disability, ethnicity, gender identity and expression, level of experience, nationality, personal appearance, race, religion, or sexual identity and orientation.
-
-## Our Standards
-
-Examples of behavior that contributes to creating a positive environment include:
-
-* Using welcoming and inclusive language
-* Being respectful of differing viewpoints and experiences
-* Gracefully accepting constructive criticism
-* Focusing on what is best for the community
-* Showing empathy towards other community members
-
-Examples of unacceptable behavior by participants include:
-
-* The use of sexualized language or imagery and unwelcome sexual attention or advances
-* Trolling, insulting/derogatory comments, and personal or political attacks
-* Public or private harassment
-* Publishing others' private information, such as a physical or electronic address, without explicit permission
-* Other conduct which could reasonably be considered inappropriate in a professional setting
-
-## Our Responsibilities
-
-Project maintainers are responsible for clarifying the standards of acceptable behavior and are expected to take appropriate and fair corrective action in response to any instances of unacceptable behavior.
-
-Project maintainers have the right and responsibility to remove, edit, or reject comments, commits, code, wiki edits, issues, and other contributions that are not aligned to this Code of Conduct, or to ban temporarily or permanently any contributor for other behaviors that they deem inappropriate, threatening, offensive, or harmful.
-
-## Scope
-
-This Code of Conduct applies both within project spaces and in public spaces when an individual is representing the project or its community. Examples of representing a project or community include using an official project e-mail address, posting via an official social media account, or acting as an appointed representative at an online or offline event. Representation of a project may be further defined and clarified by project maintainers.
-
-## Enforcement
-
-Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by contacting the project team at astorino.design@gmail.com. The project team will review and investigate all complaints, and will respond in a way that it deems appropriate to the circumstances. The project team is obligated to maintain confidentiality with regard to the reporter of an incident. Further details of specific enforcement policies may be posted separately.
-
-Project maintainers who do not follow or enforce the Code of Conduct in good faith may face temporary or permanent repercussions as determined by other members of the project's leadership.
-
-## Attribution
-
-This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4, available at [http://contributor-covenant.org/version/1/4][version]
-
-[homepage]: http://contributor-covenant.org
-[version]: http://contributor-covenant.org/version/1/4/
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
deleted file mode 100644
index 3e296f9..0000000
--- a/CONTRIBUTING.md
+++ /dev/null
@@ -1,104 +0,0 @@
-# Contributing guidelines
-
-> Note: this document is intended as a draft, it will be updated soon
-
-## Requirements:
-
-* Nodejs ^6.x
-* Visual Studio Code
-* GPG Tool
-
-- [Contributing guidelines](#contributing-guidelines)
-    - [Requirements:](#requirements)
-    - [Decrypt content](#decrypt-content)
-    - [Installing and compiling source](#installing-and-compiling-source)
-        - [Testing the theme](#testing-the-theme)
-        - [Adding new Material Theme commands](#adding-new-material-theme-commands)
-        - [Adding new icons](#adding-new-icons)
-    - [Financial contributions](#financial-contributions)
-    - [Credits](#credits)
-        - [Contributors](#contributors)
-        - [Backers](#backers)
-        - [Sponsors](#sponsors)
-
-## Decrypt content
-We use git-crypt to encrypt compiler files. To contribute you need a GPG key public/private associated with your github email.
-
-1. Export your public key by running
-
-```gpg --output PATH/FILENAME.gpg --export ASSOCIATEDEMAIL```
-
-2. Send the exported `.gpg` file to a contributor that will add you to the trusted people.
-3. Fetch and pull then decrypt files with `git-crypt unlock` entering your key password.
-
-## Installing and compiling source
-
-First you will have to install node_modules through npm or yarn
-
-```shell
-npm install
-# or
-yarn install
-```
-
-To compile to the source code, you have to execute the build task through visual studio code.
-First you need to invoke to quick command (on MacOS `⌘P`, while on Linux/windows is `ctrl+p`)
-then type `task build` and wait until vsc will have finished the task.
-
-### Testing the theme
-
-To test the theme, you will have to go to the debug section, select the *Launch Extension* from debug and execute it.
-
-### Adding new Material Theme commands
-
-Soon(ish)®
-
-### Adding new icons
-
-* Add your icon to the `~/src/icons/svgs` directory.
-
-* Add the reference to that icon to the `~/src/icons/partials/fileNames.js` or if your icon is referred to a directory adds the reference to the `~/src/icons/partials/folderNames.js` file, otherwise to `~/src/icons/partials/fileExtensions.js` if is referred to a file extension.
-
-* If you want to make the icon sensitive to be accented, modify the `~/extensions/defaults.json` file, adding the icon definition to the `accentableIcons` array (e.g. ["_folder_open", "_folder_open_build"]) and the path to the `icons.theme.iconDefinitions` object. The same applies to variants (the variant icons array is called "variantsIcons")
-
-* Execute the build command.
-
-* Enjoy your new icons in Material Theme, and don't forget to pull request!
-
-
-## Financial contributions
-
-We also welcome financial contributions in full transparency on our [open collective](https://opencollective.com/vsc-material-theme).
-Anyone can file an expense. If the expense makes sense for the development of the community, it will be "merged" in the ledger of our open collective by the core contributors and the person who filed the expense will be reimbursed.
-
-
-## Credits
-
-
-### Contributors
-
-Thank you to all the people who have already contributed to vsc-material-theme!
-<a href="graphs/contributors"><img src="https://opencollective.com/vsc-material-theme/contributors.svg?width=890" /></a>
-
-
-### Backers
-
-Thank you to all our backers! [[Become a backer](https://opencollective.com/vsc-material-theme#backer)]
-
-<a href="https://opencollective.com/vsc-material-theme#backers" target="_blank"><img src="https://opencollective.com/vsc-material-theme/backers.svg?width=890"></a>
-
-
-### Sponsors
-
-Thank you to all our sponsors! (please ask your company to also support this open source project by [becoming a sponsor](https://opencollective.com/vsc-material-theme#sponsor))
-
-<a href="https://opencollective.com/vsc-material-theme/sponsor/0/website" target="_blank"><img src="https://opencollective.com/vsc-material-theme/sponsor/0/avatar.svg"></a>
-<a href="https://opencollective.com/vsc-material-theme/sponsor/1/website" target="_blank"><img src="https://opencollective.com/vsc-material-theme/sponsor/1/avatar.svg"></a>
-<a href="https://opencollective.com/vsc-material-theme/sponsor/2/website" target="_blank"><img src="https://opencollective.com/vsc-material-theme/sponsor/2/avatar.svg"></a>
-<a href="https://opencollective.com/vsc-material-theme/sponsor/3/website" target="_blank"><img src="https://opencollective.com/vsc-material-theme/sponsor/3/avatar.svg"></a>
-<a href="https://opencollective.com/vsc-material-theme/sponsor/4/website" target="_blank"><img src="https://opencollective.com/vsc-material-theme/sponsor/4/avatar.svg"></a>
-<a href="https://opencollective.com/vsc-material-theme/sponsor/5/website" target="_blank"><img src="https://opencollective.com/vsc-material-theme/sponsor/5/avatar.svg"></a>
-<a href="https://opencollective.com/vsc-material-theme/sponsor/6/website" target="_blank"><img src="https://opencollective.com/vsc-material-theme/sponsor/6/avatar.svg"></a>
-<a href="https://opencollective.com/vsc-material-theme/sponsor/7/website" target="_blank"><img src="https://opencollective.com/vsc-material-theme/sponsor/7/avatar.svg"></a>
-<a href="https://opencollective.com/vsc-material-theme/sponsor/8/website" target="_blank"><img src="https://opencollective.com/vsc-material-theme/sponsor/8/avatar.svg"></a>
-<a href="https://opencollective.com/vsc-material-theme/sponsor/9/website" target="_blank"><img src="https://opencollective.com/vsc-material-theme/sponsor/9/avatar.svg"></a>
diff --git a/LICENSE b/LICENSE
deleted file mode 100644
index f83691d..0000000
--- a/LICENSE
+++ /dev/null
@@ -1,201 +0,0 @@
-                                 Apache License
-                           Version 2.0, January 2004
-                        http://www.apache.org/licenses/
-
-   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
-
-   1. Definitions.
-
-      "License" shall mean the terms and conditions for use, reproduction,
-      and distribution as defined by Sections 1 through 9 of this document.
-
-      "Licensor" shall mean the copyright owner or entity authorized by
-      the copyright owner that is granting the License.
-
-      "Legal Entity" shall mean the union of the acting entity and all
-      other entities that control, are controlled by, or are under common
-      control with that entity. For the purposes of this definition,
-      "control" means (i) the power, direct or indirect, to cause the
-      direction or management of such entity, whether by contract or
-      otherwise, or (ii) ownership of fifty percent (50%) or more of the
-      outstanding shares, or (iii) beneficial ownership of such entity.
-
-      "You" (or "Your") shall mean an individual or Legal Entity
-      exercising permissions granted by this License.
-
-      "Source" form shall mean the preferred form for making modifications,
-      including but not limited to software source code, documentation
-      source, and configuration files.
-
-      "Object" form shall mean any form resulting from mechanical
-      transformation or translation of a Source form, including but
-      not limited to compiled object code, generated documentation,
-      and conversions to other media types.
-
-      "Work" shall mean the work of authorship, whether in Source or
-      Object form, made available under the License, as indicated by a
-      copyright notice that is included in or attached to the work
-      (an example is provided in the Appendix below).
-
-      "Derivative Works" shall mean any work, whether in Source or Object
-      form, that is based on (or derived from) the Work and for which the
-      editorial revisions, annotations, elaborations, or other modifications
-      represent, as a whole, an original work of authorship. For the purposes
-      of this License, Derivative Works shall not include works that remain
-      separable from, or merely link (or bind by name) to the interfaces of,
-      the Work and Derivative Works thereof.
-
-      "Contribution" shall mean any work of authorship, including
-      the original version of the Work and any modifications or additions
-      to that Work or Derivative Works thereof, that is intentionally
-      submitted to Licensor for inclusion in the Work by the copyright owner
-      or by an individual or Legal Entity authorized to submit on behalf of
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-      means any form of electronic, verbal, or written communication sent
-      to the Licensor or its representatives, including but not limited to
-      communication on electronic mailing lists, source code control systems,
-      and issue tracking systems that are managed by, or on behalf of, the
-      Licensor for the purpose of discussing and improving the Work, but
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-      "Contributor" shall mean Licensor and any individual or Legal Entity
-      on behalf of whom a Contribution has been received by Licensor and
-      subsequently incorporated within the Work.
-
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-      incurred by, or claims asserted against, such Contributor by reason
-      of your accepting any such warranty or additional liability.
-
-   END OF TERMS AND CONDITIONS
-
-   APPENDIX: How to apply the Apache License to your work.
-
-      To apply the Apache License to your work, attach the following
-      boilerplate notice, with the fields enclosed by brackets "{}"
-      replaced with your own identifying information. (Don't include
-      the brackets!)  The text should be enclosed in the appropriate
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-      file or class name and description of purpose be included on the
-      same "printed page" as the copyright notice for easier
-      identification within third-party archives.
-
-   Copyright 2017 Mattia Astorino
-
-   Licensed under the Apache License, Version 2.0 (the "License");
-   you may not use this file except in compliance with the License.
-   You may obtain a copy of the License at
-
-       http://www.apache.org/licenses/LICENSE-2.0
-
-   Unless required by applicable law or agreed to in writing, software
-   distributed under the License is distributed on an "AS IS" BASIS,
-   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-   See the License for the specific language governing permissions and
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\ No newline at end of file
diff --git a/README.md b/README.md
deleted file mode 100644
index e612f41..0000000
--- a/README.md
+++ /dev/null
@@ -1,191 +0,0 @@
-
-<p align="center"><img width="980px" src="https://image.ibb.co/mGCtnn/Material_Theme.gif"></p>
-
-[![Twitter](https://img.shields.io/twitter/url/https/github.com/equinusocio/vsc-material-theme.svg?style=flat-square)](https://twitter.com/intent/tweet?text=This%20is%20the%20most%20epic%20theme:&url=https%3A%2F%2Fgithub.com%2Fequinusocio%2Fvsc-material-theme)
-[![GitHub tag](https://img.shields.io/github/release/equinusocio/vsc-material-theme.svg?style=flat-square)](https://github.com/equinusocio/vsc-material-theme/releases)
-<a href="https://code.visualstudio.com/updates/v1_19"><img src="https://img.shields.io/badge/VS_Code-v1.19+-373277.svg?style=flat-square"/></a> <a href="https://marketplace.visualstudio.com/items?itemName=Equinusocio.vsc-material-theme"><img src="https://vsmarketplacebadge.apphb.com/installs/Equinusocio.vsc-material-theme.svg?style=flat-square"/></a>
-<a href="https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=9RSHP5RSLKH64&lc=GB&item_name=Material%20Theme%20for%20Visual%20Studio%20Code&item_number=material%2dtheme%2ddonation&no_note=0&cn=Aggiungi%20istruzioni%20speciali%20per%20il%20venditore%3a&no_shipping=2&currency_code=EUR&bn=PP%2dDonationsBF%3abtn_donate_LG%2egif%3aNonHosted
-"><img src="https://img.shields.io/badge/Support%20this%20project-%F0%9F%92%80-ff69b4.svg?style=flat-square"/></a>
-
-
-The most epic theme meets Visual Studio Code. You can help by reporting issues [here](https://github.com/equinusocio/vsc-material-theme/issues)
-
-<!-- TOC -->
-
-- [Getting started](#getting-started)
-    - [Installation](#installation)
-            - [Packaged VSIX Extension](#packaged-vsix-extension)
-                - [GitHub Repository Clone](#github-repository-clone)
-    - [Activate theme](#activate-theme)
-    - [Activate File Icons](#activate-file-icons)
-    - [Set the accent color](#set-the-accent-color)
-    - [Override theme colors](#override-theme-colors)
-- [Recommended settings for a better experience](#recommended-settings-for-a-better-experience)
-- [Other resources](#other-resources)
-    - [Contributors](#contributors)
-    - [Backers](#backers)
-    - [Sponsors](#sponsors)
-
-<!-- /TOC -->
-
-<details>
-    <summary>Screenshots</summary>
-    <p align="center">
-    <img src="https://image.ibb.co/jUrdnn/material_theme_lighter.png" border="0">
-    <img src="https://image.ibb.co/gF6dnn/material_theme_default.png" border="0">
-    <img src="https://image.ibb.co/gSW007/material_theme_darker.png" border="0">
-    <img src="https://image.ibb.co/jnBdnn/material_theme_palenight.png" border="0">
-    </p>
-</details>
-
-# Getting started
-
-You can install this awesome theme through the [Visual Studio Code Marketplace](https://marketplace.visualstudio.com/items?itemName=Equinusocio.vsc-material-theme).
-
-## Installation
-
-Launch *Quick Open*
-  - <img src="https://www.kernel.org/theme/images/logos/favicon.png" width=16 height=16/> <a href="https://code.visualstudio.com/shortcuts/keyboard-shortcuts-linux.pdf">Linux</a> `Ctrl+P`
-  - <img src="https://developer.apple.com/favicon.ico" width=16 height=16/> <a href="https://code.visualstudio.com/shortcuts/keyboard-shortcuts-macos.pdf">macOS</a> `⌘P`
-  - <img src="https://www.microsoft.com/favicon.ico" width=16 height=16/> <a href="https://code.visualstudio.com/shortcuts/keyboard-shortcuts-windows.pdf">Windows</a> `Ctrl+P`
-
-Paste the following command and press `Enter`:
-
-```shell
-ext install vsc-material-theme
-```
-
-#### Packaged VSIX Extension
-
-[Download the latest .vsix release](https://github.com/equinusocio/vsc-material-theme/releases/latest) file from the GitHub repository and install it from the command line
-
-```shell
-code --install-extension vsc-material-theme-*.*.*.vsix
-```
-
-or from within VS Code by launching *Quick Open* and running the *Install from VSIX...* command.
-
-##### GitHub Repository Clone
-
-Change to your `.vscode/extensions` [VS Code extensions directory](https://code.visualstudio.com/docs/extensions/install-extension#_side-loading).
-Depending on your platform it is located in the following folders:
-
-  - <img src="https://www.kernel.org/theme/images/logos/favicon.png" width=16 height=16/> **Linux** `~/.vscode/extensions`
-  - <img src="https://developer.apple.com/favicon.ico" width=16 height=16/> **macOs** `~/.vscode/extensions`
-  - <img src="https://www.microsoft.com/favicon.ico" width=16 height=16/> **Windows** `%USERPROFILE%\.vscode\extensions`
-
-Clone the Material Theme repository as `Equinusocio.vsc-material-theme`:
-
-```shell
-git clone https://github.com/equinusocio/vsc-material-theme.git Equinusocio.vsc-material-theme
-```
-
-
-## Activate theme
-
-Launch *Quick Open*,
-
-  - <img src="https://www.kernel.org/theme/images/logos/favicon.png" width=16 height=16/> <a href="https://code.visualstudio.com/shortcuts/keyboard-shortcuts-linux.pdf">Linux</a> `Ctrl + Shift + P`
-  - <img src="https://developer.apple.com/favicon.ico" width=16 height=16/> <a href="https://code.visualstudio.com/shortcuts/keyboard-shortcuts-macos.pdf">macOS</a> `⌘ + Shift + P`
-  - <img src="https://www.microsoft.com/favicon.ico" width=16 height=16/> <a href="https://code.visualstudio.com/shortcuts/keyboard-shortcuts-windows.pdf">Windows</a> `Ctrl + Shift + P`
-
-Type `theme` and choose `Preferences: Color Theme`, then select Material Theme from the list.
-
-This theme provides different color variants, to change the active theme variant type `Material Theme` and choose `Material Theme: Settings`, then select `Change color variant` and pick one theme from the list.
-
-## Activate File Icons
-
-Launch *Quick Open*,
-
-  - <img src="https://www.kernel.org/theme/images/logos/favicon.png" width=16 height=16/> <a href="https://code.visualstudio.com/shortcuts/keyboard-shortcuts-linux.pdf">Linux</a> `Ctrl + Shift + P`
-  - <img src="https://developer.apple.com/favicon.ico" width=16 height=16/> <a href="https://code.visualstudio.com/shortcuts/keyboard-shortcuts-macos.pdf">macOS</a> `⌘ + Shift + P`
-  - <img src="https://www.microsoft.com/favicon.ico" width=16 height=16/> <a href="https://code.visualstudio.com/shortcuts/keyboard-shortcuts-windows.pdf">Windows</a> `Ctrl + Shift + P`
-
-type `icon theme` and select `Material Theme Icons` from the drop-down menu.
-
-## Set the accent color
-
-Launch *Quick Open*,
-
-  - <img src="https://www.kernel.org/theme/images/logos/favicon.png" width=16 height=16/> <a href="https://code.visualstudio.com/shortcuts/keyboard-shortcuts-linux.pdf">Linux</a> `Ctrl + Shift + P`
-  - <img src="https://developer.apple.com/favicon.ico" width=16 height=16/> <a href="https://code.visualstudio.com/shortcuts/keyboard-shortcuts-macos.pdf">macOS</a> `⌘ + Shift + P`
-  - <img src="https://www.microsoft.com/favicon.ico" width=16 height=16/> <a href="https://code.visualstudio.com/shortcuts/keyboard-shortcuts-windows.pdf">Windows</a> `Ctrl + Shift + P`
-
-Type `Material Theme` and choose `Material Theme: Settings`, then select `Change accent color` and pick one color from the list.
-
-## Override theme colors
-You can override the material theme ui and schemes colors by adding these theme-specific settings to your configuration.
-
-```js
-"editor.tokenColorCustomizations": {
-    "textMateRules": [
-        {
-            "scope": "ELEMENT_SCOPE",
-            "settings": {
-                "foreground": "HEX COLOR"
-            }
-        }
-    ]    
-},
-"workbench.colorCustomizations": {
-    "[Material Theme]": {
-        "sideBar.background": "#347890"
-    },
-    "..."
-}
-```
-
-You can read more about this VSC feature on the [official doc](https://code.visualstudio.com/docs/getstarted/themes#_customizing-a-color-theme)
-
-# Recommended settings for a better experience
-
-```js
-{
-    // Controls the font family.
-    "editor.fontFamily": "Operator Mono",
-    // Controls the line height. Use 0 to compute the lineHeight from the fontSize.
-    "editor.lineHeight": 24,
-    // Enables font ligatures
-    "editor.fontLigatures": true,
-    // Controls if file decorations should use badges.
-    "explorer.decorations.badges": false
-}
-```
-
-# Other resources
-- **AppIcon:** [Download](https://github.com/equinusocio/vsc-material-theme/files/989048/vsc-material-theme-appicon.zip) the official Material Theme app icon for Visual Studio code
-
-
-## Contributors
-
-This project exists thanks to all the people who contribute. [[Contribute]](CONTRIBUTING.md).
-<a href="graphs/contributors"><img src="https://opencollective.com/vsc-material-theme/contributors.svg?width=890" /></a>
-
-
-## Backers
-
-Thank you to all our backers! 🙏 [[Become a backer](https://opencollective.com/vsc-material-theme#backer)]
-
-<a href="https://opencollective.com/vsc-material-theme#backers" target="_blank"><img src="https://opencollective.com/vsc-material-theme/backers.svg?width=890"></a>
-
-
-## Sponsors
-
-Support this project by becoming a sponsor. Your logo will show up here with a link to your website. [[Become a sponsor](https://opencollective.com/vsc-material-theme#sponsor)]
-
-<a href="https://opencollective.com/vsc-material-theme/sponsor/0/website" target="_blank"><img src="https://opencollective.com/vsc-material-theme/sponsor/0/avatar.svg"></a>
-<a href="https://opencollective.com/vsc-material-theme/sponsor/1/website" target="_blank"><img src="https://opencollective.com/vsc-material-theme/sponsor/1/avatar.svg"></a>
-<a href="https://opencollective.com/vsc-material-theme/sponsor/2/website" target="_blank"><img src="https://opencollective.com/vsc-material-theme/sponsor/2/avatar.svg"></a>
-<a href="https://opencollective.com/vsc-material-theme/sponsor/3/website" target="_blank"><img src="https://opencollective.com/vsc-material-theme/sponsor/3/avatar.svg"></a>
-<a href="https://opencollective.com/vsc-material-theme/sponsor/4/website" target="_blank"><img src="https://opencollective.com/vsc-material-theme/sponsor/4/avatar.svg"></a>
-<a href="https://opencollective.com/vsc-material-theme/sponsor/5/website" target="_blank"><img src="https://opencollective.com/vsc-material-theme/sponsor/5/avatar.svg"></a>
-<a href="https://opencollective.com/vsc-material-theme/sponsor/6/website" target="_blank"><img src="https://opencollective.com/vsc-material-theme/sponsor/6/avatar.svg"></a>
-<a href="https://opencollective.com/vsc-material-theme/sponsor/7/website" target="_blank"><img src="https://opencollective.com/vsc-material-theme/sponsor/7/avatar.svg"></a>
-<a href="https://opencollective.com/vsc-material-theme/sponsor/8/website" target="_blank"><img src="https://opencollective.com/vsc-material-theme/sponsor/8/avatar.svg"></a>
-<a href="https://opencollective.com/vsc-material-theme/sponsor/9/website" target="_blank"><img src="https://opencollective.com/vsc-material-theme/sponsor/9/avatar.svg"></a>
-
----
-
-<p align="center"> <img src="https://equinusocio.gallerycdn.vsassets.io/extensions/equinusocio/vsc-material-theme/0.0.14/1494970083238/Microsoft.VisualStudio.Services.Icons.Default" width=16 height=16/> Copyright &copy; 2017 Mattia Astorino</p>
-
-<p align="center"><a href="http://www.apache.org/licenses/LICENSE-2.0"><img src="https://img.shields.io/badge/License-Apache_2.0-5E81AC.svg?style=flat-square"/></a> <a href="https://creativecommons.org/licenses/by-sa/4.0"><img src="https://img.shields.io/badge/License-CC_BY--SA_4.0-5E81AC.svg?style=flat-square"/></a></p>
diff --git a/assets/header.jpg b/assets/header.jpg
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deleted file mode 100644
index 99e91e8..0000000
--- a/extensions/defaults.json
+++ /dev/null
@@ -1,197 +0,0 @@
-{
-  "accents": {
-    "Acid Lime": "#C6FF00",
-    "Blue": "#2979FF",
-    "Breaking Bad": "#388E3C",
-    "Bright Teal": "#64FFDA",
-    "Cyan": "#00BCD4",
-    "Graphite": "#616161",
-    "Indigo": "#5C6BC0",
-    "Lime": "#7CB342",
-    "Orange": "#FF7042",
-    "Pink": "#FF4081",
-    "Purple": "#AB47BC",
-    "Red": "#E57373",
-    "Sky": "#84FFFF",
-    "Tomato": "#F44336",
-    "Teal": "#80CBC4",
-    "Yellow": "#FFA000"
-  },
-  "accentableIcons": [
-    "_folder_open",
-    "_folder_open_build",
-    "_folder_vscode_open",
-    "_folder_gulp_open",
-    "_folder_node_open",
-    "_folder_images_open",
-    "_folder_js_open",
-    "_folder_src_open",
-    "_folder_assets_open",
-    "_folder_bower_open",
-    "_folder_git_open",
-    "_folder_github_open",
-    "_folder_test_open",
-    "_folder_dist_open",
-    "_folder_ci_open"
-  ],
-  "changelog": {
-    "lastversion": "1.5.1"
-  },
-  "icons": {
-    "theme": {
-      "iconDefinitions": {
-        "_folder_ci": {
-          "iconPath": "../icons/folder_ci.svg"
-        },
-        "_folder_ci_open": {
-          "iconPath": "../icons/folder_ci_open.svg"
-        },
-        "_folder_dist": {
-          "iconPath": "../icons/folder_dist.svg"
-        },
-        "_folder_dist_open": {
-          "iconPath": "../icons/folder_dist_open.svg"
-        },
-        "_folder_test": {
-          "iconPath": "../icons/folder_test.svg"
-        },
-        "_folder_test_open": {
-          "iconPath": "../icons/folder_test_open.svg"
-        },
-        "_folder_github": {
-          "iconPath": "../icons/folder_github.svg"
-        },
-        "_folder_github_open": {
-          "iconPath": "../icons/folder_github_open.svg"
-        },
-        "_folder_git": {
-          "iconPath": "../icons/folder_git.svg"
-        },
-        "_folder_git_open": {
-          "iconPath": "../icons/folder_git_open.svg"
-        },
-        "_folder_bower": {
-          "iconPath": "../icons/folder_bower.svg"
-        },
-        "_folder_bower_open": {
-          "iconPath": "../icons/folder_bower_open.svg"
-        },
-        "_folder_assets": {
-          "iconPath": "../icons/folder_assets.svg"
-        },
-        "_folder_assets_open": {
-          "iconPath": "../icons/folder_assets_open.svg"
-        },
-        "_folder_src": {
-          "iconPath": "../icons/folder_src.svg"
-        },
-        "_folder_src_open": {
-          "iconPath": "../icons/folder_src_open.svg"
-        },
-        "_folder_js": {
-          "iconPath": "../icons/folder_js.svg"
-        },
-        "_folder_js_open": {
-          "iconPath": "../icons/folder_js_open.svg"
-        },
-        "_folder_images": {
-          "iconPath": "../icons/folder_images.svg"
-        },
-        "_folder_images_open": {
-          "iconPath": "../icons/folder_images_open.svg"
-        },
-        "_folder_gulp": {
-          "iconPath": "../icons/folder_gulp.svg"
-        },
-        "_folder_gulp_open": {
-          "iconPath": "../icons/folder_gulp_open.svg"
-        },
-        "_folder_node": {
-          "iconPath": "../icons/folder_node.svg"
-        },
-        "_folder_node_open": {
-          "iconPath": "../icons/folder_node_open.svg"
-        },
-        "_folder_vscode": {
-          "iconPath": "../icons/folder_vscode.svg"
-        },
-        "_folder_vscode_open": {
-          "iconPath": "../icons/folder_vscode_open.svg"
-        },
-        "_folder_dark": {
-          "iconPath": "../icons/folder_dark.svg"
-        },
-        "_folder_dark_build": {
-          "iconPath": "../icons/folder_dark_build.svg"
-        },
-        "_folder_light": {
-          "iconPath": "../icons/folder_light.svg"
-        },
-        "_folder_light_build": {
-          "iconPath": "../icons/folder_light_build.svg"
-        },
-        "_file_folder": {
-          "iconPath": "../icons/file_folder.svg"
-        },
-        "_file_folder_build": {
-          "iconPath": "../icons/file_folder_build.svg"
-        },
-        "_folder_open": {
-          "iconPath": "../icons/folder_open.svg"
-        },
-        "_folder_open_build": {
-          "iconPath": "../icons/folder_open_build.svg"
-        }
-      }
-    }
-  },
-  "themeVariants": {
-    "Darker": "./themes/Material-Theme-Darker.json",
-    "Darker High Contrast": "./themes/Material-Theme-Darker-High-Contrast.json",
-    "Default": "./themes/Material-Theme-Default.json",
-    "Default High Contrast": "./themes/Material-Theme-Default-High-Contrast.json",
-    "Light": "./themes/Material-Theme-Lighter.json",
-    "Light High Contrast": "./themes/Material-Theme-Lighter-High-Contrast.json",
-    "Palenight": "./themes/Material-Theme-Palenight.json",
-    "Palenight High Contrast": "./themes/Material-Theme-Palenight-High-Contrast.json"
-  },
-  "themeVariantsColours": {
-    "Darker": "#424242",
-    "Darker High Contrast": "#424242",
-    "Default": "#4A616C",
-    "Default High Contrast": "#4A616C",
-    "Light": "#90A4AE",
-    "Light High Contrast": "#90A4AE",
-    "Palenight": "#4E5579",
-    "Palenight High Contrast": "#4E5579"
-  },
-  "themeVariantsUITheme": {
-    "Darker": "vs-dark",
-    "Darker High Contrast": "vs-dark",
-    "Default": "vs-dark",
-    "Default High Contrast": "vs-dark",
-    "Light": "vs",
-    "Light High Contrast": "vs",
-    "Palenight": "vs-dark",
-    "Palenight High Contrast": "vs-dark"
-  },
-  "variantsIcons": [
-    "_folder_dark_build",
-    "_folder_dark",
-    "_folder_light_build",
-    "_folder_light",
-    "_folder_vscode",
-    "_folder_gulp",
-    "_folder_node",
-    "_folder_images",
-    "_folder_js",
-    "_folder_src",
-    "_folder_assets",
-    "_folder_bower",
-    "_folder_git",
-    "_folder_github",
-    "_folder_test",
-    "_folder_dist",
-    "_folder_ci"
-  ]
-}
\ No newline at end of file
diff --git a/extensions/helpers/changelog.ts b/extensions/helpers/changelog.ts
deleted file mode 100644
index d5a13aa..0000000
Binary files a/extensions/helpers/changelog.ts and /dev/null differ
diff --git a/extensions/helpers/fs.ts b/extensions/helpers/fs.ts
deleted file mode 100644
index 674a82e..0000000
Binary files a/extensions/helpers/fs.ts and /dev/null differ
diff --git a/extensions/helpers/settings.ts b/extensions/helpers/settings.ts
deleted file mode 100644
index 673405f..0000000
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diff --git a/extensions/helpers/vscode.ts b/extensions/helpers/vscode.ts
deleted file mode 100644
index 650dd51..0000000
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diff --git a/extensions/interfaces/iaccent-custom-property.ts b/extensions/interfaces/iaccent-custom-property.ts
deleted file mode 100644
index 3fe0b31..0000000
Binary files a/extensions/interfaces/iaccent-custom-property.ts and /dev/null differ
diff --git a/extensions/interfaces/idefaults.ts b/extensions/interfaces/idefaults.ts
deleted file mode 100644
index a23e4ff..0000000
Binary files a/extensions/interfaces/idefaults.ts and /dev/null differ
diff --git a/extensions/interfaces/igeneric-object.ts b/extensions/interfaces/igeneric-object.ts
deleted file mode 100644
index 7f97a2c..0000000
Binary files a/extensions/interfaces/igeneric-object.ts and /dev/null differ
diff --git a/extensions/interfaces/ipackage.json.ts b/extensions/interfaces/ipackage.json.ts
deleted file mode 100644
index 8b035e5..0000000
Binary files a/extensions/interfaces/ipackage.json.ts and /dev/null differ
diff --git a/extensions/interfaces/ipaths.ts b/extensions/interfaces/ipaths.ts
deleted file mode 100644
index d5282d7..0000000
Binary files a/extensions/interfaces/ipaths.ts and /dev/null differ
diff --git a/extensions/interfaces/itheme-custom-properties.ts b/extensions/interfaces/itheme-custom-properties.ts
deleted file mode 100644
index e7f1159..0000000
Binary files a/extensions/interfaces/itheme-custom-properties.ts and /dev/null differ
diff --git a/extensions/interfaces/itheme-icons.ts b/extensions/interfaces/itheme-icons.ts
deleted file mode 100644
index 8bbb976..0000000
Binary files a/extensions/interfaces/itheme-icons.ts and /dev/null differ
diff --git a/extensions/material.theme.config.ts b/extensions/material.theme.config.ts
deleted file mode 100644
index 8e78d65..0000000
Binary files a/extensions/material.theme.config.ts and /dev/null differ
diff --git a/gulpfile.babel.ts b/gulpfile.babel.ts
deleted file mode 100644
index 40ab315..0000000
--- a/gulpfile.babel.ts
+++ /dev/null
@@ -1,9 +0,0 @@
-import * as Gulp from 'gulp';
-import * as GulpStats from 'gulp-stats';
-import * as tasks from './.gulp';
-
-// Use gulp-stats
-GulpStats(Gulp);
-
-// set default task
-Gulp.task('default', tasks.default as any);
\ No newline at end of file
diff --git a/iconlist.json b/iconlist.json
deleted file mode 100644
index 83ccbc5..0000000
--- a/iconlist.json
+++ /dev/null
@@ -1,113 +0,0 @@
-[
-  "actionscript",
-  "ai",
-  "android",
-  "angular",
-  "arduino",
-  "assembly",
-  "autohotkey",
-  "bower",
-  "c-lang",
-  "certificate",
-  "changelog",
-  "clojure",
-  "cmake",
-  "cmd",
-  "coffee",
-  "console",
-  "contributing",
-  "cpp",
-  "credits",
-  "csharp",
-  "css-map",
-  "css",
-  "dart",
-  "database",
-  "dlang",
-  "docker",
-  "document",
-  "email",
-  "exe",
-  "favicon",
-  "file",
-  "flash",
-  "flow",
-  "folder-light",
-  "folder-outline",
-  "folder",
-  "font",
-  "fsharp",
-  "git",
-  "github",
-  "gopher",
-  "gradle",
-  "groovy",
-  "grunt",
-  "gulp",
-  "haskell",
-  "html",
-  "image",
-  "ionic",
-  "java",
-  "javascript-map",
-  "js",
-  "json",
-  "key",
-  "kotlin",
-  "less",
-  "lib",
-  "license",
-  "lua",
-  "markdown",
-  "markup",
-  "movie",
-  "music",
-  "mustache",
-  "mxml",
-  "nodejs",
-  "npm",
-  "ocaml",
-  "pdf",
-  "php",
-  "polymer",
-  "postcss",
-  "powerpoint",
-  "procfile",
-  "pug",
-  "python",
-  "r",
-  "rails",
-  "raml",
-  "react",
-  "readme",
-  "ruby",
-  "rust",
-  "sass",
-  "settings",
-  "sketch",
-  "star",
-  "stylus",
-  "sublime",
-  "svg",
-  "swc",
-  "swift",
-  "swig",
-  "table",
-  "tex",
-  "todo",
-  "tune",
-  "twig",
-  "typescript",
-  "typescript_def",
-  "url",
-  "virtual",
-  "visualstudio",
-  "vue",
-  "webpack",
-  "word",
-  "xaml",
-  "xml",
-  "yaml",
-  "yarn",
-  "zip"
-]
\ No newline at end of file
diff --git a/logo.png b/logo.png
deleted file mode 100644
index c30b64f..0000000
Binary files a/logo.png and /dev/null differ
diff --git a/package-lock.json b/package-lock.json
deleted file mode 100644
index 3bd6035..0000000
--- a/package-lock.json
+++ /dev/null
@@ -1,9623 +0,0 @@
-{
-  "name": "vsc-material-theme",
-  "version": "1.6.0",
-  "lockfileVersion": 1,
-  "requires": true,
-  "dependencies": {
-    "@types/chalk": {
-      "version": "2.2.0",
-      "resolved": "https://registry.npmjs.org/@types/chalk/-/chalk-2.2.0.tgz",
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-      "dev": true,
-      "requires": {
-        "chalk": "1.1.3"
-      }
-    },
-    "@types/chokidar": {
-      "version": "1.7.4",
-      "resolved": "https://registry.npmjs.org/@types/chokidar/-/chokidar-1.7.4.tgz",
-      "integrity": "sha512-QVuksEzbvU22DJg9vFW9O++u0yT6aXnn64qq/KzaUUWuf+E2IAEzAM90qGlgWpLq3pPHbUfvmlJz1TZnUePQUg==",
-      "dev": true,
-      "requires": {
-        "@types/events": "1.1.0",
-        "@types/node": "9.4.5"
-      }
-    },
-    "@types/events": {
-      "version": "1.1.0",
-      "resolved": "https://registry.npmjs.org/@types/events/-/events-1.1.0.tgz",
-      "integrity": "sha512-y3bR98mzYOo0pAZuiLari+cQyiKk3UXRuT45h1RjhfeCzqkjaVsfZJNaxdgtk7/3tzOm1ozLTqEqMP3VbI48jw==",
-      "dev": true
-    },
-    "@types/glob": {
-      "version": "5.0.35",
-      "resolved": "https://registry.npmjs.org/@types/glob/-/glob-5.0.35.tgz",
-      "integrity": "sha512-wc+VveszMLyMWFvXLkloixT4n0harUIVZjnpzztaZ0nKLuul7Z32iMt2fUFGAaZ4y1XWjFRMtCI5ewvyh4aIeg==",
-      "dev": true,
-      "requires": {
-        "@types/events": "1.1.0",
-        "@types/minimatch": "3.0.3",
-        "@types/node": "9.4.5"
-      }
-    },
-    "@types/glob-stream": {
-      "version": "6.1.0",
-      "resolved": "https://registry.npmjs.org/@types/glob-stream/-/glob-stream-6.1.0.tgz",
-      "integrity": "sha512-RHv6ZQjcTncXo3thYZrsbAVwoy4vSKosSWhuhuQxLOTv74OJuFQxXkmUuZCr3q9uNBEVCvIzmZL/FeRNbHZGUg==",
-      "dev": true,
-      "requires": {
-        "@types/glob": "5.0.35",
-        "@types/node": "9.4.5"
-      }
-    },
-    "@types/gulp": {
-      "version": "4.0.5",
-      "resolved": "https://registry.npmjs.org/@types/gulp/-/gulp-4.0.5.tgz",
-      "integrity": "sha512-nx1QjPTiRpvLfYsZ7MBu7bT6Cm7tAXyLbY0xbdx2IEMxCK2v2urIhJMQZHW0iV1TskM71Xl6p2uRRuWDbk+/7g==",
-      "dev": true,
-      "requires": {
-        "@types/chokidar": "1.7.4",
-        "@types/undertaker": "1.1.4",
-        "@types/vinyl-fs": "2.4.8"
-      }
-    },
-    "@types/gulp-if": {
-      "version": "0.0.33",
-      "resolved": "https://registry.npmjs.org/@types/gulp-if/-/gulp-if-0.0.33.tgz",
-      "integrity": "sha512-J5lzff21X7r1x/4hSzn02GgIUEyjCqYIXZ9GgGBLhbsD3RiBdqwnkFWgF16/0jO5rcVZ52Zp+6MQMQdvIsWuKg==",
-      "dev": true,
-      "requires": {
-        "@types/node": "9.4.5",
-        "@types/vinyl": "2.0.2"
-      }
-    },
-    "@types/gulp-util": {
-      "version": "3.0.34",
-      "resolved": "https://registry.npmjs.org/@types/gulp-util/-/gulp-util-3.0.34.tgz",
-      "integrity": "sha512-E06WN1OfqL5UsMwJ1T7ClgnaXgaPipb7Ee8euMc3KRHLNqxdvWrDir9KA6uevgzBgT7XbjgmzZA2pkzDqBBX7A==",
-      "dev": true,
-      "requires": {
-        "@types/node": "9.4.5",
-        "@types/through2": "2.0.33",
-        "@types/vinyl": "2.0.2",
-        "chalk": "2.3.1"
-      },
-      "dependencies": {
-        "ansi-styles": {
-          "version": "3.2.0",
-          "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.0.tgz",
-          "integrity": "sha512-NnSOmMEYtVR2JVMIGTzynRkkaxtiq1xnFBcdQD/DnNCYPoEPsVJhM98BDyaoNOQIi7p4okdi3E27eN7GQbsUug==",
-          "dev": true,
-          "requires": {
-            "color-convert": "1.9.1"
-          }
-        },
-        "chalk": {
-          "version": "2.3.1",
-          "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.3.1.tgz",
-          "integrity": "sha512-QUU4ofkDoMIVO7hcx1iPTISs88wsO8jA92RQIm4JAwZvFGGAV2hSAA1NX7oVj2Ej2Q6NDTcRDjPTFrMCRZoJ6g==",
-          "dev": true,
-          "requires": {
-            "ansi-styles": "3.2.0",
-            "escape-string-regexp": "1.0.5",
-            "supports-color": "5.2.0"
-          }
-        },
-        "supports-color": {
-          "version": "5.2.0",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-5.2.0.tgz",
-          "integrity": "sha512-F39vS48la4YvTZUPVeTqsjsFNrvcMwrV3RLZINsmHo+7djCvuUzSIeXOnZ5hmjef4bajL1dNccN+tg5XAliO5Q==",
-          "dev": true,
-          "requires": {
-            "has-flag": "3.0.0"
-          }
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-      }
-    },
-    "@types/minimatch": {
-      "version": "3.0.3",
-      "resolved": "https://registry.npmjs.org/@types/minimatch/-/minimatch-3.0.3.tgz",
-      "integrity": "sha512-tHq6qdbT9U1IRSGf14CL0pUlULksvY9OZ+5eEgl1N7t+OA3tGvNpxJCzuKQlsNgCVwbAs670L1vcVQi8j9HjnA==",
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-    "@types/mustache": {
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-      "resolved": "https://registry.npmjs.org/@types/mustache/-/mustache-0.8.30.tgz",
-      "integrity": "sha512-z80ZxL9CwGlyyuZ7fz3RBtsxzSasf8R8LeSQYF5xrdFVlkV4fsdJ51U1F1lSFAL+Xwk9Jxe7aueeeBedAi52Eg==",
-      "dev": true
-    },
-    "@types/node": {
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-      "resolved": "https://registry.npmjs.org/@types/node/-/node-9.4.5.tgz",
-      "integrity": "sha512-DvC7bzO5797bkApgukxouHmkOdYN2D0yL5olw0RncDpXUa6n39qTVsUi/5g2QJjPgl8qn4zh+4h0sofNoWGLRg==",
-      "dev": true
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-    "@types/run-sequence": {
-      "version": "0.0.30",
-      "resolved": "https://registry.npmjs.org/@types/run-sequence/-/run-sequence-0.0.30.tgz",
-      "integrity": "sha512-XwGr1b4yCGUILKeBkzmeWcxmGHQ0vFFFpA6D6y1yLO6gKmYorF+PHqdU5KG+nWt38OvtrkDptmrSmlHX/XtpLw==",
-      "dev": true,
-      "requires": {
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-        "@types/node": "9.4.5"
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-    },
-    "@types/through2": {
-      "version": "2.0.33",
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-      "integrity": "sha1-H/LoihAN+1sUDnu5h5HxGUQA0TE=",
-      "dev": true,
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-    "@types/undertaker": {
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-  }
-}
diff --git a/package.json b/package.json
deleted file mode 100644
index 395d870..0000000
--- a/package.json
+++ /dev/null
@@ -1,142 +0,0 @@
-{
-  "name": "vsc-material-theme",
-  "displayName": "Material Theme",
-  "description": "The most epic theme now for Visual Studio Code",
-  "version": "1.6.0",
-  "publisher": "Equinusocio",
-  "license": "Apache-2.0",
-  "author": "Mattia Astorino [@equinusocio]",
-  "icon": "logo.png",
-  "galleryBanner": {
-    "color": "#263238",
-    "theme": "dark"
-  },
-  "homepage": "https://github.com/equinusocio/vsc-material-theme",
-  "repository": {
-    "type": "git",
-    "url": "https://github.com/equinusocio/vsc-material-theme.git"
-  },
-  "bugs": {
-    "url": "https://github.com/equinusocio/vsc-material-theme/issues"
-  },
-  "engines": {
-    "vscode": "^1.19.0"
-  },
-  "standard-version": {
-    "scripts": {
-      "postchangelog": "yarn gulp changelog-title"
-    }
-  },
-  "scripts": {
-    "build": "yarn build-icons && yarn build-themes && yarn build-icons-accents && yarn build-icons-variants",
-    "minimize-icons": "svgo -f src/icons/svgs -o icons/",
-    "minimize-json": "json-minify themes/.material-theme-icons.tmp > themes/Material-Theme-Icons.json && yarn remove-icons-tmp",
-    "remove-icons": "rimraf icons/* && rimraf themes/Material-Theme-Icons.json",
-    "remove-icons-tmp": "rimraf themes/.material-theme-icons.tmp",
-    "build-icons": "yarn remove-icons && yarn minimize-icons && yarn gulp build:icons && yarn minimize-json",
-    "build-icons-accents": "yarn gulp build:icons.accents",
-    "build-icons-variants": "yarn gulp build:icons.variants",
-    "build-themes": "yarn gulp build:themes",
-    "release": "standard-version",
-    "postinstall": "node ./node_modules/vscode/bin/install && opencollective postinstall"
-  },
-  "categories": [
-    "Themes",
-    "Other"
-  ],
-  "activationEvents": [
-    "*"
-  ],
-  "main": "./extensions/material.theme.config.js",
-  "contributes": {
-    "commands": [
-      {
-        "category": "🎨 Material theme",
-        "command": "material.theme.config",
-        "title": "Settings"
-      }
-    ],
-    "configuration": {
-      "properties": {
-        "materialTheme.cache.workbench.accent": {
-          "type": "string",
-          "title": "[DEPRECATED] This is an old property.",
-          "description": "This property is intended only for migrating old settings system to a new one. It will be removed in new versions. Don't use it, use \"materialTheme.cache.workbench.settings\" instead."
-        },
-        "materialTheme.cache.workbench.settings": {
-          "default": {},
-          "type": "object",
-          "title": "Custom material theme settings",
-          "description": "Material theme settings object."
-        }
-      }
-    },
-    "themes": [
-      {
-        "label": "Material Theme",
-        "path": "./themes/Material-Theme-Palenight.json",
-        "uiTheme": "vs-dark"
-      }
-    ],
-    "iconThemes": [
-      {
-        "id": "eq-material-theme-icons",
-        "label": "Material Theme Icons",
-        "path": "./themes/Material-Theme-Icons.json"
-      }
-    ]
-  },
-  "badges": [
-    {
-      "url": "https://camo.githubusercontent.com/d3c6e53aa66426dead24cdedab0e83082103bea6/68747470733a2f2f696d672e736869656c64732e696f2f6769746875622f6973737565732f657175696e75736f63696f2f7673632d6d6174657269616c2d7468656d652e7376673f7374796c653d666c61742d737175617265",
-      "href": "https://github.com/equinusocio/vsc-material-theme/issues",
-      "description": "Open issues"
-    }
-  ],
-  "devDependencies": {
-    "@types/chalk": "2.2.0",
-    "@types/gulp": "4.0.5",
-    "@types/gulp-if": "0.0.33",
-    "@types/gulp-util": "3.0.34",
-    "@types/mustache": "0.8.30",
-    "@types/run-sequence": "0.0.30",
-    "@types/through2": "2.0.33",
-    "@types/yamljs": "0.2.30",
-    "@types/yargs": "10.0.1",
-    "babel-core": "6.26.0",
-    "babel-preset-es2015": "6.24.1",
-    "babel-root-import": "4.1.8",
-    "cpx": "1.5.0",
-    "eslint": "4.17.0",
-    "eslint-plugin-standard": "3.0.1",
-    "gulp": "3.9.1",
-    "gulp-bump": "3.1.0",
-    "gulp-conventional-changelog": "1.1.11",
-    "gulp-if": "2.0.2",
-    "gulp-stats": "0.0.4",
-    "gulp-util": "3.0.8",
-    "json-minify": "1.0.0",
-    "mustache": "2.3.0",
-    "rimraf": "2.6.2",
-    "run-sequence": "2.2.1",
-    "standard-version": "4.3.0",
-    "svgo": "1.0.4",
-    "typescript": "2.7.1",
-    "vscode": "1.1.10",
-    "yamljs": "0.3.0",
-    "yargs": "11.0.0"
-  },
-  "__metadata": {
-    "id": "dffaf5a1-2219-434b-9d87-cb586fd59260",
-    "publisherDisplayName": "Mattia Astorino",
-    "publisherId": "e41388a1-a892-4c1e-940b-1e7c1bf43c97"
-  },
-  "dependencies": {
-    "opencollective": "1.0.3"
-  },
-  "collective": {
-    "type": "opencollective",
-    "url": "https://opencollective.com/vsc-material-theme",
-    "logo": "https://opencollective.com/opencollective/logo.txt"
-  }
-}
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@@ -1,79 +0,0 @@
-comment                     — for comments.
-comment.line                    — line comments, we specialize further so that the type of comment start character(s) can be extracted from the scope.
-comment.line.double-slash           — // comment
-comment.line.double-dash            — -- comment
-comment.line.number-sign            — # comment
-comment.line.percentage             — % comment
-comment.line.character              — other types of line comments.
-comment.block               — multi-line comments like /* … */ and <!-- … -->.
-comment.block.documentation     — embedded documentation.
-
-constant                — various forms of constants.
-constant.numeric        — those which represent numbers, e.g. 42, 1.3f, 0x4AB1U.
-constant.character      — those which represent characters, e.g. &lt;, \e, \031.
-constant.escape         — escape sequences like \e would be constant.character.escape.
-constant.language       — constants (generally) provided by the language which are “special” like true, false, nil, YES, NO, etc.
-constant.other          — other constants, e.g. colors in CSS.
-
-entity                          — an entity refers to a larger part of the document, for example a chapter, class, function, or tag. We do not scope the entire entity as entity.* (we use meta.* for that). But we do use entity.* for the “placeholders” in the larger entity, e.g. if the entity is a chapter, we would use entity.name.section for the chapter title.
-entity.name                     — we are naming the larger entity.
-entity.name.function            — the name of a function.
-entity.name.type                — the name of a type declaration or class.
-entity.name.tag                 — a tag name.
-entity.name.section             — the name is the name of a section/heading.
-entity.other                    — other entities.
-entity.other.inherited-class    — the superclass/baseclass name.
-entity.other.attribute-name     — the name of an attribute (mainly in tags).
-
-invalid                 — stuff which is “invalid”.
-invalid.illegal         — illegal, e.g. an ampersand or lower-than character in HTML (which is not part of an entity/tag).
-invalid.deprecated      — for deprecated stuff e.g. using an API function which is deprecated or using styling with strict HTML.
-
-keyword                 — keywords (when these do not fall into the other groups).
-keyword.control         — mainly related to flow control like continue, while, return, etc.
-keyword.operator        — operators can either be textual (e.g. or) or be characters.
-keyword.other           — other keywords.
-
-markup                      — this is for markup languages and generally applies to larger subsets of the text.
-markup.underline            — underlined text.
-markup.underline.link       — this is for links, as a convenience this is derived from markup.underline so that if there is no theme rule which specifically targets markup.underline.link then it will inherit the underline style.
-markup.bold                 — bold text (text which is strong and similar should preferably be derived from this name).
-markup.heading              — a section header. Optionally provide the heading level as the next element, for example markup.heading.2.html for <h2>…</h2> in HTML.
-markup.italic               — italic text (text which is emphasized and similar should preferably be derived from this name).
-markup.list                 — list items.
-markup.list.numbered        — numbered list items.
-markup.list.unnumbered      — unnumbered list items.
-markup.quote                — quoted (sometimes block quoted) text.
-markup.raw                  — text which is verbatim, e.g. code listings. Normally spell checking is disabled for markup.raw.
-markup.inline.raw
-markup.other                — other markup constructs.
-
-meta - the meta scope is generally used to markup larger parts of the document. For example the entire line which declares a function would be meta.function and the subsets would be storage.type, entity.name.function, variable.parameter etc. and only the latter would be styled. Sometimes the meta part of the scope will be used only to limit the more general element that is styled, most of the time meta scopes are however used in scope selectors for activation of bundle items. For example in Objective-C there is a meta scope for the interface declaration of a class and the implementation, allowing the same tab-triggers to expand differently, depending on context.
-
-storage             — things relating to “storage”.
-storage.type        — the type of something, class, function, int, var, etc.
-storage.modifier    — a storage modifier like static, final, abstract, etc.
-
-string                      — strings.
-string.quoted               — quoted strings.
-string.quoted.single        — single quoted strings: 'foo'.
-string.quoted.double        — double quoted strings: "foo".
-string.quoted.triple        — triple quoted strings: """Python""".
-string.quoted.other         — other types of quoting: $'shell', %s{...}.
-string.unquoted             — for things like here-docs and here-strings.
-string.interpolated         — strings which are “evaluated”: `date`, $(pwd).
-string.regexp               — regular expressions: /(\w+)/.
-string.other                — other types of strings (should rarely be used).
-
-support             — things provided by a framework or library should be below support.
-support.function    — functions provided by the framework/library. For example NSLog in Objective-C is support.function.
-support.class       — when the framework/library provides classes.
-support.type        — types provided by the framework/library, this is probably only used for languages derived from C, which has typedef (and struct). Most other languages would introduce new types as classes.
-support.constant    — constants (magic values) provided by the framework/library.
-support.variable    — variables provided by the framework/library. For example NSApp in AppKit.
-support.other       — the above should be exhaustive, but for everything else use support.other.
-
-variable                — variables. Not all languages allow easy identification (and thus markup) of these.
-variable.parameter      — when the variable is declared as the parameter.
-variable.language       — reserved language variables like this, super, self, etc.
-variable.other          — other variables, like $some_variables.
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diff --git a/test/shell.bash b/test/shell.bash
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--- a/test/shell.bash
+++ /dev/null
@@ -1,2 +0,0 @@
-#!/bin/bash
-echo "$RANDOM"  # Supported in bash. No warnings.
diff --git a/test/shell.fish b/test/shell.fish
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--- a/test/shell.sh
+++ /dev/null
@@ -1,2 +0,0 @@
-#!/bin/sh
-echo "$RANDOM"  # Unsupported in sh. Produces warning.
diff --git a/test/sketch.sketch b/test/sketch.sketch
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diff --git a/test/source.c b/test/source.c
deleted file mode 100644
index f0094b3..0000000
--- a/test/source.c
+++ /dev/null
@@ -1,1573 +0,0 @@
-#include "ccv.h"
-#include "ccv_internal.h"
-#include <sys/time.h>
-#ifdef HAVE_GSL
-#include <gsl/gsl_rng.h>
-#include <gsl/gsl_randist.h>
-#endif
-#ifdef USE_OPENMP
-#include <omp.h>
-#endif
-
-const ccv_bbf_param_t ccv_bbf_default_params = {
-    .interval = 5,
-    .min_neighbors = 2,
-    .accurate = 1,
-    .flags = 0,
-    .size = {
-        24,
-        24,
-    },
-};
-
-#define _ccv_width_padding(x) (((x) + 3) & -4)
-
-static inline int _ccv_run_bbf_feature(ccv_bbf_feature_t *feature, int *step, unsigned char **u8)
-{
-#define pf_at(i) (*(u8[feature->pz[i]] + feature->px[i] + feature->py[i] * step[feature->pz[i]]))
-#define nf_at(i) (*(u8[feature->nz[i]] + feature->nx[i] + feature->ny[i] * step[feature->nz[i]]))
-  unsigned char pmin = pf_at(0), nmax = nf_at(0);
-  /* check if every point in P > every point in N, and take a shortcut */
-  if (pmin <= nmax)
-    return 0;
-  int i;
-  for (i = 1; i < feature->size; i++)
-  {
-    if (feature->pz[i] >= 0)
-    {
-      int p = pf_at(i);
-      if (p < pmin)
-      {
-        if (p <= nmax)
-          return 0;
-        pmin = p;
-      }
-    }
-    if (feature->nz[i] >= 0)
-    {
-      int n = nf_at(i);
-      if (n > nmax)
-      {
-        if (pmin <= n)
-          return 0;
-        nmax = n;
-      }
-    }
-  }
-#undef pf_at
-#undef nf_at
-  return 1;
-}
-
-static int _ccv_read_bbf_stage_classifier(const char *file, ccv_bbf_stage_classifier_t *classifier)
-{
-  FILE *r = fopen(file, "r");
-  if (r == 0)
-    return -1;
-  int stat = 0;
-  stat |= fscanf(r, "%d", &classifier->count);
-  union {
-    float fl;
-    int i;
-  } fli;
-  stat |= fscanf(r, "%d", &fli.i);
-  classifier->threshold = fli.fl;
-  classifier->feature = (ccv_bbf_feature_t *)ccmalloc(classifier->count * sizeof(ccv_bbf_feature_t));
-  classifier->alpha = (float *)ccmalloc(classifier->count * 2 * sizeof(float));
-  int i, j;
-  for (i = 0; i < classifier->count; i++)
-  {
-    stat |= fscanf(r, "%d", &classifier->feature[i].size);
-    for (j = 0; j < classifier->feature[i].size; j++)
-    {
-      stat |= fscanf(r, "%d %d %d", &classifier->feature[i].px[j], &classifier->feature[i].py[j], &classifier->feature[i].pz[j]);
-      stat |= fscanf(r, "%d %d %d", &classifier->feature[i].nx[j], &classifier->feature[i].ny[j], &classifier->feature[i].nz[j]);
-    }
-    union {
-      float fl;
-      int i;
-    } flia, flib;
-    stat |= fscanf(r, "%d %d", &flia.i, &flib.i);
-    classifier->alpha[i * 2] = flia.fl;
-    classifier->alpha[i * 2 + 1] = flib.fl;
-  }
-  fclose(r);
-  return 0;
-}
-
-#ifdef HAVE_GSL
-
-static unsigned int _ccv_bbf_time_measure()
-{
-  struct timeval tv;
-  gettimeofday(&tv, 0);
-  return tv.tv_sec * 1000000 + tv.tv_usec;
-}
-
-#define less_than(a, b, aux) ((a) < (b))
-CCV_IMPLEMENT_QSORT(_ccv_sort_32f, float, less_than)
-#undef less_than
-
-static void _ccv_bbf_eval_data(ccv_bbf_stage_classifier_t *classifier, unsigned char **posdata, int posnum, unsigned char **negdata, int negnum, ccv_size_t size, float *peval, float *neval)
-{
-  int i, j;
-  int steps[] = {_ccv_width_padding(size.width),
-                 _ccv_width_padding(size.width >> 1),
-                 _ccv_width_padding(size.width >> 2)};
-  int isizs0 = steps[0] * size.height;
-  int isizs01 = isizs0 + steps[1] * (size.height >> 1);
-  for (i = 0; i < posnum; i++)
-  {
-    unsigned char *u8[] = {posdata[i], posdata[i] + isizs0, posdata[i] + isizs01};
-    float sum = 0;
-    float *alpha = classifier->alpha;
-    ccv_bbf_feature_t *feature = classifier->feature;
-    for (j = 0; j < classifier->count; ++j, alpha += 2, ++feature)
-      sum += alpha[_ccv_run_bbf_feature(feature, steps, u8)];
-    peval[i] = sum;
-  }
-  for (i = 0; i < negnum; i++)
-  {
-    unsigned char *u8[] = {negdata[i], negdata[i] + isizs0, negdata[i] + isizs01};
-    float sum = 0;
-    float *alpha = classifier->alpha;
-    ccv_bbf_feature_t *feature = classifier->feature;
-    for (j = 0; j < classifier->count; ++j, alpha += 2, ++feature)
-      sum += alpha[_ccv_run_bbf_feature(feature, steps, u8)];
-    neval[i] = sum;
-  }
-}
-
-static int _ccv_prune_positive_data(ccv_bbf_classifier_cascade_t *cascade, unsigned char **posdata, int posnum, ccv_size_t size)
-{
-  float *peval = (float *)ccmalloc(posnum * sizeof(float));
-  int i, j, k, rpos = posnum;
-  for (i = 0; i < cascade->count; i++)
-  {
-    _ccv_bbf_eval_data(cascade->stage_classifier + i, posdata, rpos, 0, 0, size, peval, 0);
-    k = 0;
-    for (j = 0; j < rpos; j++)
-      if (peval[j] >= cascade->stage_classifier[i].threshold)
-      {
-        posdata[k] = posdata[j];
-        ++k;
-      }
-      else
-      {
-        ccfree(posdata[j]);
-      }
-    rpos = k;
-  }
-  ccfree(peval);
-  return rpos;
-}
-
-static int _ccv_prepare_background_data(ccv_bbf_classifier_cascade_t *cascade, char **bgfiles, int bgnum, unsigned char **negdata, int negnum)
-{
-  int t, i, j, k, q;
-  int negperbg;
-  int negtotal = 0;
-  int steps[] = {_ccv_width_padding(cascade->size.width),
-                 _ccv_width_padding(cascade->size.width >> 1),
-                 _ccv_width_padding(cascade->size.width >> 2)};
-  int isizs0 = steps[0] * cascade->size.height;
-  int isizs1 = steps[1] * (cascade->size.height >> 1);
-  int isizs2 = steps[2] * (cascade->size.height >> 2);
-  int *idcheck = (int *)ccmalloc(negnum * sizeof(int));
-
-  gsl_rng_env_setup();
-
-  gsl_rng *rng = gsl_rng_alloc(gsl_rng_default);
-  gsl_rng_set(rng, (unsigned long int)idcheck);
-
-  ccv_size_t imgsz = cascade->size;
-  int rneg = negtotal;
-  for (t = 0; negtotal < negnum; t++)
-  {
-    PRINT(CCV_CLI_INFO, "preparing negative data ...  0%%");
-    for (i = 0; i < bgnum; i++)
-    {
-      negperbg = (t < 2) ? (negnum - negtotal) / (bgnum - i) + 1 : negnum - negtotal;
-      ccv_dense_matrix_t *image = 0;
-      ccv_read(bgfiles[i], &image, CCV_IO_GRAY | CCV_IO_ANY_FILE);
-      assert((image->type & CCV_C1) && (image->type & CCV_8U));
-      if (image == 0)
-      {
-        PRINT(CCV_CLI_ERROR, "\n%s file corrupted\n", bgfiles[i]);
-        continue;
-      }
-      if (t % 2 != 0)
-        ccv_flip(image, 0, 0, CCV_FLIP_X);
-      if (t % 4 >= 2)
-        ccv_flip(image, 0, 0, CCV_FLIP_Y);
-      ccv_bbf_param_t params = {.interval = 3, .min_neighbors = 0, .accurate = 1, .flags = 0, .size = cascade->size};
-      ccv_array_t *detected = ccv_bbf_detect_objects(image, &cascade, 1, params);
-      memset(idcheck, 0, ccv_min(detected->rnum, negperbg) * sizeof(int));
-      for (j = 0; j < ccv_min(detected->rnum, negperbg); j++)
-      {
-        int r = gsl_rng_uniform_int(rng, detected->rnum);
-        int flag = 1;
-        ccv_rect_t *rect = (ccv_rect_t *)ccv_array_get(detected, r);
-        while (flag)
-        {
-          flag = 0;
-          for (k = 0; k < j; k++)
-            if (r == idcheck[k])
-            {
-              flag = 1;
-              r = gsl_rng_uniform_int(rng, detected->rnum);
-              break;
-            }
-          rect = (ccv_rect_t *)ccv_array_get(detected, r);
-          if ((rect->x < 0) || (rect->y < 0) || (rect->width + rect->x > image->cols) || (rect->height + rect->y > image->rows))
-          {
-            flag = 1;
-            r = gsl_rng_uniform_int(rng, detected->rnum);
-          }
-        }
-        idcheck[j] = r;
-        ccv_dense_matrix_t *temp = 0;
-        ccv_dense_matrix_t *imgs0 = 0;
-        ccv_dense_matrix_t *imgs1 = 0;
-        ccv_dense_matrix_t *imgs2 = 0;
-        ccv_slice(image, (ccv_matrix_t **)&temp, 0, rect->y, rect->x, rect->height, rect->width);
-        ccv_resample(temp, &imgs0, 0, imgsz.height, imgsz.width, CCV_INTER_AREA);
-        assert(imgs0->step == steps[0]);
-        ccv_matrix_free(temp);
-        ccv_sample_down(imgs0, &imgs1, 0, 0, 0);
-        assert(imgs1->step == steps[1]);
-        ccv_sample_down(imgs1, &imgs2, 0, 0, 0);
-        assert(imgs2->step == steps[2]);
-
-        negdata[negtotal] = (unsigned char *)ccmalloc(isizs0 + isizs1 + isizs2);
-        unsigned char *u8s0 = negdata[negtotal];
-        unsigned char *u8s1 = negdata[negtotal] + isizs0;
-        unsigned char *u8s2 = negdata[negtotal] + isizs0 + isizs1;
-        unsigned char *u8[] = {u8s0, u8s1, u8s2};
-        memcpy(u8s0, imgs0->data.u8, imgs0->rows * imgs0->step);
-        ccv_matrix_free(imgs0);
-        memcpy(u8s1, imgs1->data.u8, imgs1->rows * imgs1->step);
-        ccv_matrix_free(imgs1);
-        memcpy(u8s2, imgs2->data.u8, imgs2->rows * imgs2->step);
-        ccv_matrix_free(imgs2);
-
-        flag = 1;
-        ccv_bbf_stage_classifier_t *classifier = cascade->stage_classifier;
-        for (k = 0; k < cascade->count; ++k, ++classifier)
-        {
-          float sum = 0;
-          float *alpha = classifier->alpha;
-          ccv_bbf_feature_t *feature = classifier->feature;
-          for (q = 0; q < classifier->count; ++q, alpha += 2, ++feature)
-            sum += alpha[_ccv_run_bbf_feature(feature, steps, u8)];
-          if (sum < classifier->threshold)
-          {
-            flag = 0;
-            break;
-          }
-        }
-        if (!flag)
-          ccfree(negdata[negtotal]);
-        else
-        {
-          ++negtotal;
-          if (negtotal >= negnum)
-            break;
-        }
-      }
-      ccv_array_free(detected);
-      ccv_matrix_free(image);
-      ccv_drain_cache();
-      PRINT(CCV_CLI_INFO, "\rpreparing negative data ... %2d%%", 100 * negtotal / negnum);
-      fflush(0);
-      if (negtotal >= negnum)
-        break;
-    }
-    if (rneg == negtotal)
-      break;
-    rneg = negtotal;
-    PRINT(CCV_CLI_INFO, "\nentering additional round %d\n", t + 1);
-  }
-  gsl_rng_free(rng);
-  ccfree(idcheck);
-  ccv_drain_cache();
-  PRINT(CCV_CLI_INFO, "\n");
-  return negtotal;
-}
-
-static void _ccv_prepare_positive_data(ccv_dense_matrix_t **posimg, unsigned char **posdata, ccv_size_t size, int posnum)
-{
-  PRINT(CCV_CLI_INFO, "preparing positive data ...  0%%");
-  int i;
-  for (i = 0; i < posnum; i++)
-  {
-    ccv_dense_matrix_t *imgs0 = posimg[i];
-    ccv_dense_matrix_t *imgs1 = 0;
-    ccv_dense_matrix_t *imgs2 = 0;
-    assert((imgs0->type & CCV_C1) && (imgs0->type & CCV_8U) && imgs0->rows == size.height && imgs0->cols == size.width);
-    ccv_sample_down(imgs0, &imgs1, 0, 0, 0);
-    ccv_sample_down(imgs1, &imgs2, 0, 0, 0);
-    int isizs0 = imgs0->rows * imgs0->step;
-    int isizs1 = imgs1->rows * imgs1->step;
-    int isizs2 = imgs2->rows * imgs2->step;
-
-    posdata[i] = (unsigned char *)ccmalloc(isizs0 + isizs1 + isizs2);
-    memcpy(posdata[i], imgs0->data.u8, isizs0);
-    memcpy(posdata[i] + isizs0, imgs1->data.u8, isizs1);
-    memcpy(posdata[i] + isizs0 + isizs1, imgs2->data.u8, isizs2);
-
-    PRINT(CCV_CLI_INFO, "\rpreparing positive data ... %2d%%", 100 * (i + 1) / posnum);
-    fflush(0);
-
-    ccv_matrix_free(imgs1);
-    ccv_matrix_free(imgs2);
-  }
-  ccv_drain_cache();
-  PRINT(CCV_CLI_INFO, "\n");
-}
-
-typedef struct
-{
-  double fitness;
-  int pk, nk;
-  int age;
-  double error;
-  ccv_bbf_feature_t feature;
-} ccv_bbf_gene_t;
-
-static inline void _ccv_bbf_genetic_fitness(ccv_bbf_gene_t *gene)
-{
-  gene->fitness = (1 - gene->error) * exp(-0.01 * gene->age) * exp((gene->pk + gene->nk) * log(1.015));
-}
-
-static inline int _ccv_bbf_exist_gene_feature(ccv_bbf_gene_t *gene, int x, int y, int z)
-{
-  int i;
-  for (i = 0; i < gene->pk; i++)
-    if (z == gene->feature.pz[i] && x == gene->feature.px[i] && y == gene->feature.py[i])
-      return 1;
-  for (i = 0; i < gene->nk; i++)
-    if (z == gene->feature.nz[i] && x == gene->feature.nx[i] && y == gene->feature.ny[i])
-      return 1;
-  return 0;
-}
-
-static inline void _ccv_bbf_randomize_gene(gsl_rng *rng, ccv_bbf_gene_t *gene, int *rows, int *cols)
-{
-  int i;
-  do
-  {
-    gene->pk = gsl_rng_uniform_int(rng, CCV_BBF_POINT_MAX - 1) + 1;
-    gene->nk = gsl_rng_uniform_int(rng, CCV_BBF_POINT_MAX - 1) + 1;
-  } while (gene->pk + gene->nk < CCV_BBF_POINT_MIN); /* a hard restriction of at least 3 points have to be examed */
-  gene->feature.size = ccv_max(gene->pk, gene->nk);
-  gene->age = 0;
-  for (i = 0; i < CCV_BBF_POINT_MAX; i++)
-  {
-    gene->feature.pz[i] = -1;
-    gene->feature.nz[i] = -1;
-  }
-  int x, y, z;
-  for (i = 0; i < gene->pk; i++)
-  {
-    do
-    {
-      z = gsl_rng_uniform_int(rng, 3);
-      x = gsl_rng_uniform_int(rng, cols[z]);
-      y = gsl_rng_uniform_int(rng, rows[z]);
-    } while (_ccv_bbf_exist_gene_feature(gene, x, y, z));
-    gene->feature.pz[i] = z;
-    gene->feature.px[i] = x;
-    gene->feature.py[i] = y;
-  }
-  for (i = 0; i < gene->nk; i++)
-  {
-    do
-    {
-      z = gsl_rng_uniform_int(rng, 3);
-      x = gsl_rng_uniform_int(rng, cols[z]);
-      y = gsl_rng_uniform_int(rng, rows[z]);
-    } while (_ccv_bbf_exist_gene_feature(gene, x, y, z));
-    gene->feature.nz[i] = z;
-    gene->feature.nx[i] = x;
-    gene->feature.ny[i] = y;
-  }
-}
-
-static inline double _ccv_bbf_error_rate(ccv_bbf_feature_t *feature, unsigned char **posdata, int posnum, unsigned char **negdata, int negnum, ccv_size_t size, double *pw, double *nw)
-{
-  int i;
-  int steps[] = {_ccv_width_padding(size.width),
-                 _ccv_width_padding(size.width >> 1),
-                 _ccv_width_padding(size.width >> 2)};
-  int isizs0 = steps[0] * size.height;
-  int isizs01 = isizs0 + steps[1] * (size.height >> 1);
-  double error = 0;
-  for (i = 0; i < posnum; i++)
-  {
-    unsigned char *u8[] = {posdata[i], posdata[i] + isizs0, posdata[i] + isizs01};
-    if (!_ccv_run_bbf_feature(feature, steps, u8))
-      error += pw[i];
-  }
-  for (i = 0; i < negnum; i++)
-  {
-    unsigned char *u8[] = {negdata[i], negdata[i] + isizs0, negdata[i] + isizs01};
-    if (_ccv_run_bbf_feature(feature, steps, u8))
-      error += nw[i];
-  }
-  return error;
-}
-
-#define less_than(fit1, fit2, aux) ((fit1).fitness >= (fit2).fitness)
-static CCV_IMPLEMENT_QSORT(_ccv_bbf_genetic_qsort, ccv_bbf_gene_t, less_than)
-#undef less_than
-
-    static ccv_bbf_feature_t _ccv_bbf_genetic_optimize(unsigned char **posdata, int posnum, unsigned char **negdata, int negnum, int ftnum, ccv_size_t size, double *pw, double *nw)
-{
-  ccv_bbf_feature_t best;
-  /* seed (random method) */
-  gsl_rng_env_setup();
-  gsl_rng *rng = gsl_rng_alloc(gsl_rng_default);
-  union {
-    unsigned long int li;
-    double db;
-  } dbli;
-  dbli.db = pw[0] + nw[0];
-  gsl_rng_set(rng, dbli.li);
-  int i, j;
-  int pnum = ftnum * 100;
-  assert(pnum > 0);
-  ccv_bbf_gene_t *gene = (ccv_bbf_gene_t *)ccmalloc(pnum * sizeof(ccv_bbf_gene_t));
-  int rows[] = {size.height, size.height >> 1, size.height >> 2};
-  int cols[] = {size.width, size.width >> 1, size.width >> 2};
-  for (i = 0; i < pnum; i++)
-    _ccv_bbf_randomize_gene(rng, &gene[i], rows, cols);
-  unsigned int timer = _ccv_bbf_time_measure();
-#ifdef USE_OPENMP
-#pragma omp parallel for private(i) schedule(dynamic)
-#endif
-  for (i = 0; i < pnum; i++)
-    gene[i].error = _ccv_bbf_error_rate(&gene[i].feature, posdata, posnum, negdata, negnum, size, pw, nw);
-  timer = _ccv_bbf_time_measure() - timer;
-  for (i = 0; i < pnum; i++)
-    _ccv_bbf_genetic_fitness(&gene[i]);
-  double best_err = 1;
-  int rnum = ftnum * 39; /* number of randomize */
-  int mnum = ftnum * 40; /* number of mutation */
-  int hnum = ftnum * 20; /* number of hybrid */
-  /* iteration stop crit : best no change in 40 iterations */
-  int it = 0, t;
-  for (t = 0; it < 40; ++it, ++t)
-  {
-    int min_id = 0;
-    double min_err = gene[0].error;
-    for (i = 1; i < pnum; i++)
-      if (gene[i].error < min_err)
-      {
-        min_id = i;
-        min_err = gene[i].error;
-      }
-    min_err = gene[min_id].error = _ccv_bbf_error_rate(&gene[min_id].feature, posdata, posnum, negdata, negnum, size, pw, nw);
-    if (min_err < best_err)
-    {
-      best_err = min_err;
-      memcpy(&best, &gene[min_id].feature, sizeof(best));
-      PRINT(CCV_CLI_INFO, "best bbf feature with error %f\n|-size: %d\n|-positive point: ", best_err, best.size);
-      for (i = 0; i < best.size; i++)
-        PRINT(CCV_CLI_INFO, "(%d %d %d), ", best.px[i], best.py[i], best.pz[i]);
-      PRINT(CCV_CLI_INFO, "\n|-negative point: ");
-      for (i = 0; i < best.size; i++)
-        PRINT(CCV_CLI_INFO, "(%d %d %d), ", best.nx[i], best.ny[i], best.nz[i]);
-      PRINT(CCV_CLI_INFO, "\n");
-      it = 0;
-    }
-    PRINT(CCV_CLI_INFO, "minimum error achieved in round %d(%d) : %f with %d ms\n", t, it, min_err, timer / 1000);
-    _ccv_bbf_genetic_qsort(gene, pnum, 0);
-    for (i = 0; i < ftnum; i++)
-      ++gene[i].age;
-    for (i = ftnum; i < ftnum + mnum; i++)
-    {
-      int parent = gsl_rng_uniform_int(rng, ftnum);
-      memcpy(gene + i, gene + parent, sizeof(ccv_bbf_gene_t));
-      /* three mutation strategy : 1. add, 2. remove, 3. refine */
-      int pnm, pn = gsl_rng_uniform_int(rng, 2);
-      int *pnk[] = {&gene[i].pk, &gene[i].nk};
-      int *pnx[] = {gene[i].feature.px, gene[i].feature.nx};
-      int *pny[] = {gene[i].feature.py, gene[i].feature.ny};
-      int *pnz[] = {gene[i].feature.pz, gene[i].feature.nz};
-      int x, y, z;
-      int victim, decay = 1;
-      do
-      {
-        switch (gsl_rng_uniform_int(rng, 3))
-        {
-        case 0: /* add */
-          if (gene[i].pk == CCV_BBF_POINT_MAX && gene[i].nk == CCV_BBF_POINT_MAX)
-            break;
-          while (*pnk[pn] + 1 > CCV_BBF_POINT_MAX)
-            pn = gsl_rng_uniform_int(rng, 2);
-          do
-          {
-            z = gsl_rng_uniform_int(rng, 3);
-            x = gsl_rng_uniform_int(rng, cols[z]);
-            y = gsl_rng_uniform_int(rng, rows[z]);
-          } while (_ccv_bbf_exist_gene_feature(&gene[i], x, y, z));
-          pnz[pn][*pnk[pn]] = z;
-          pnx[pn][*pnk[pn]] = x;
-          pny[pn][*pnk[pn]] = y;
-          ++(*pnk[pn]);
-          gene[i].feature.size = ccv_max(gene[i].pk, gene[i].nk);
-          decay = gene[i].age = 0;
-          break;
-        case 1:                                             /* remove */
-          if (gene[i].pk + gene[i].nk <= CCV_BBF_POINT_MIN) /* at least 3 points have to be examed */
-            break;
-          while (*pnk[pn] - 1 <= 0) // || *pnk[pn] + *pnk[!pn] - 1 < CCV_BBF_POINT_MIN)
-            pn = gsl_rng_uniform_int(rng, 2);
-          victim = gsl_rng_uniform_int(rng, *pnk[pn]);
-          for (j = victim; j < *pnk[pn] - 1; j++)
-          {
-            pnz[pn][j] = pnz[pn][j + 1];
-            pnx[pn][j] = pnx[pn][j + 1];
-            pny[pn][j] = pny[pn][j + 1];
-          }
-          pnz[pn][*pnk[pn] - 1] = -1;
-          --(*pnk[pn]);
-          gene[i].feature.size = ccv_max(gene[i].pk, gene[i].nk);
-          decay = gene[i].age = 0;
-          break;
-        case 2: /* refine */
-          pnm = gsl_rng_uniform_int(rng, *pnk[pn]);
-          do
-          {
-            z = gsl_rng_uniform_int(rng, 3);
-            x = gsl_rng_uniform_int(rng, cols[z]);
-            y = gsl_rng_uniform_int(rng, rows[z]);
-          } while (_ccv_bbf_exist_gene_feature(&gene[i], x, y, z));
-          pnz[pn][pnm] = z;
-          pnx[pn][pnm] = x;
-          pny[pn][pnm] = y;
-          decay = gene[i].age = 0;
-          break;
-        }
-      } while (decay);
-    }
-    for (i = ftnum + mnum; i < ftnum + mnum + hnum; i++)
-    {
-      /* hybrid strategy: taking positive points from dad, negative points from mum */
-      int dad, mum;
-      do
-      {
-        dad = gsl_rng_uniform_int(rng, ftnum);
-        mum = gsl_rng_uniform_int(rng, ftnum);
-      } while (dad == mum || gene[dad].pk + gene[mum].nk < CCV_BBF_POINT_MIN); /* at least 3 points have to be examed */
-      for (j = 0; j < CCV_BBF_POINT_MAX; j++)
-      {
-        gene[i].feature.pz[j] = -1;
-        gene[i].feature.nz[j] = -1;
-      }
-      gene[i].pk = gene[dad].pk;
-      for (j = 0; j < gene[i].pk; j++)
-      {
-        gene[i].feature.pz[j] = gene[dad].feature.pz[j];
-        gene[i].feature.px[j] = gene[dad].feature.px[j];
-        gene[i].feature.py[j] = gene[dad].feature.py[j];
-      }
-      gene[i].nk = gene[mum].nk;
-      for (j = 0; j < gene[i].nk; j++)
-      {
-        gene[i].feature.nz[j] = gene[mum].feature.nz[j];
-        gene[i].feature.nx[j] = gene[mum].feature.nx[j];
-        gene[i].feature.ny[j] = gene[mum].feature.ny[j];
-      }
-      gene[i].feature.size = ccv_max(gene[i].pk, gene[i].nk);
-      gene[i].age = 0;
-    }
-    for (i = ftnum + mnum + hnum; i < ftnum + mnum + hnum + rnum; i++)
-      _ccv_bbf_randomize_gene(rng, &gene[i], rows, cols);
-    timer = _ccv_bbf_time_measure();
-#ifdef USE_OPENMP
-#pragma omp parallel for private(i) schedule(dynamic)
-#endif
-    for (i = 0; i < pnum; i++)
-      gene[i].error = _ccv_bbf_error_rate(&gene[i].feature, posdata, posnum, negdata, negnum, size, pw, nw);
-    timer = _ccv_bbf_time_measure() - timer;
-    for (i = 0; i < pnum; i++)
-      _ccv_bbf_genetic_fitness(&gene[i]);
-  }
-  ccfree(gene);
-  gsl_rng_free(rng);
-  return best;
-}
-
-#define less_than(fit1, fit2, aux) ((fit1).error < (fit2).error)
-static CCV_IMPLEMENT_QSORT(_ccv_bbf_best_qsort, ccv_bbf_gene_t, less_than)
-#undef less_than
-
-    static ccv_bbf_gene_t _ccv_bbf_best_gene(ccv_bbf_gene_t *gene, int pnum, int point_min, unsigned char **posdata, int posnum, unsigned char **negdata, int negnum, ccv_size_t size, double *pw, double *nw)
-{
-  int i;
-  unsigned int timer = _ccv_bbf_time_measure();
-#ifdef USE_OPENMP
-#pragma omp parallel for private(i) schedule(dynamic)
-#endif
-  for (i = 0; i < pnum; i++)
-    gene[i].error = _ccv_bbf_error_rate(&gene[i].feature, posdata, posnum, negdata, negnum, size, pw, nw);
-  timer = _ccv_bbf_time_measure() - timer;
-  _ccv_bbf_best_qsort(gene, pnum, 0);
-  int min_id = 0;
-  double min_err = gene[0].error;
-  for (i = 0; i < pnum; i++)
-    if (gene[i].nk + gene[i].pk >= point_min)
-    {
-      min_id = i;
-      min_err = gene[i].error;
-      break;
-    }
-  PRINT(CCV_CLI_INFO, "local best bbf feature with error %f\n|-size: %d\n|-positive point: ", min_err, gene[min_id].feature.size);
-  for (i = 0; i < gene[min_id].feature.size; i++)
-    PRINT(CCV_CLI_INFO, "(%d %d %d), ", gene[min_id].feature.px[i], gene[min_id].feature.py[i], gene[min_id].feature.pz[i]);
-  PRINT(CCV_CLI_INFO, "\n|-negative point: ");
-  for (i = 0; i < gene[min_id].feature.size; i++)
-    PRINT(CCV_CLI_INFO, "(%d %d %d), ", gene[min_id].feature.nx[i], gene[min_id].feature.ny[i], gene[min_id].feature.nz[i]);
-  PRINT(CCV_CLI_INFO, "\nthe computation takes %d ms\n", timer / 1000);
-  return gene[min_id];
-}
-
-static ccv_bbf_feature_t _ccv_bbf_convex_optimize(unsigned char **posdata, int posnum, unsigned char **negdata, int negnum, ccv_bbf_feature_t *best_feature, ccv_size_t size, double *pw, double *nw)
-{
-  ccv_bbf_gene_t best_gene;
-  /* seed (random method) */
-  gsl_rng_env_setup();
-  gsl_rng *rng = gsl_rng_alloc(gsl_rng_default);
-  union {
-    unsigned long int li;
-    double db;
-  } dbli;
-  dbli.db = pw[0] + nw[0];
-  gsl_rng_set(rng, dbli.li);
-  int i, j, k, q, p, g, t;
-  int rows[] = {size.height, size.height >> 1, size.height >> 2};
-  int cols[] = {size.width, size.width >> 1, size.width >> 2};
-  int pnum = rows[0] * cols[0] + rows[1] * cols[1] + rows[2] * cols[2];
-  ccv_bbf_gene_t *gene = (ccv_bbf_gene_t *)ccmalloc((pnum * (CCV_BBF_POINT_MAX * 2 + 1) * 2 + CCV_BBF_POINT_MAX * 2 + 1) * sizeof(ccv_bbf_gene_t));
-  if (best_feature == 0)
-  {
-    /* bootstrapping the best feature, start from two pixels, one for positive, one for negative
-		 * the bootstrapping process go like this: first, it will assign a random pixel as positive
-		 * and enumerate every possible pixel as negative, and pick the best one. Then, enumerate every
-		 * possible pixel as positive, and pick the best one, until it converges */
-    memset(&best_gene, 0, sizeof(ccv_bbf_gene_t));
-    for (i = 0; i < CCV_BBF_POINT_MAX; i++)
-      best_gene.feature.pz[i] = best_gene.feature.nz[i] = -1;
-    best_gene.pk = 1;
-    best_gene.nk = 0;
-    best_gene.feature.size = 1;
-    best_gene.feature.pz[0] = gsl_rng_uniform_int(rng, 3);
-    best_gene.feature.px[0] = gsl_rng_uniform_int(rng, cols[best_gene.feature.pz[0]]);
-    best_gene.feature.py[0] = gsl_rng_uniform_int(rng, rows[best_gene.feature.pz[0]]);
-    for (t = 0;; ++t)
-    {
-      g = 0;
-      if (t % 2 == 0)
-      {
-        for (i = 0; i < 3; i++)
-          for (j = 0; j < cols[i]; j++)
-            for (k = 0; k < rows[i]; k++)
-              if (i != best_gene.feature.pz[0] || j != best_gene.feature.px[0] || k != best_gene.feature.py[0])
-              {
-                gene[g] = best_gene;
-                gene[g].pk = gene[g].nk = 1;
-                gene[g].feature.nz[0] = i;
-                gene[g].feature.nx[0] = j;
-                gene[g].feature.ny[0] = k;
-                g++;
-              }
-      }
-      else
-      {
-        for (i = 0; i < 3; i++)
-          for (j = 0; j < cols[i]; j++)
-            for (k = 0; k < rows[i]; k++)
-              if (i != best_gene.feature.nz[0] || j != best_gene.feature.nx[0] || k != best_gene.feature.ny[0])
-              {
-                gene[g] = best_gene;
-                gene[g].pk = gene[g].nk = 1;
-                gene[g].feature.pz[0] = i;
-                gene[g].feature.px[0] = j;
-                gene[g].feature.py[0] = k;
-                g++;
-              }
-      }
-      PRINT(CCV_CLI_INFO, "bootstrapping round : %d\n", t);
-      ccv_bbf_gene_t local_gene = _ccv_bbf_best_gene(gene, g, 2, posdata, posnum, negdata, negnum, size, pw, nw);
-      if (local_gene.error >= best_gene.error - 1e-10)
-        break;
-      best_gene = local_gene;
-    }
-  }
-  else
-  {
-    best_gene.feature = *best_feature;
-    best_gene.pk = best_gene.nk = best_gene.feature.size;
-    for (i = 0; i < CCV_BBF_POINT_MAX; i++)
-      if (best_feature->pz[i] == -1)
-      {
-        best_gene.pk = i;
-        break;
-      }
-    for (i = 0; i < CCV_BBF_POINT_MAX; i++)
-      if (best_feature->nz[i] == -1)
-      {
-        best_gene.nk = i;
-        break;
-      }
-  }
-  /* after bootstrapping, the float search technique will do the following permutations:
-	 * a). add a new point to positive or negative
-	 * b). remove a point from positive or negative
-	 * c). move an existing point in positive or negative to another position
-	 * the three rules applied exhaustively, no heuristic used. */
-  for (t = 0;; ++t)
-  {
-    g = 0;
-    for (i = 0; i < 3; i++)
-      for (j = 0; j < cols[i]; j++)
-        for (k = 0; k < rows[i]; k++)
-          if (!_ccv_bbf_exist_gene_feature(&best_gene, j, k, i))
-          {
-            /* add positive point */
-            if (best_gene.pk < CCV_BBF_POINT_MAX - 1)
-            {
-              gene[g] = best_gene;
-              gene[g].feature.pz[gene[g].pk] = i;
-              gene[g].feature.px[gene[g].pk] = j;
-              gene[g].feature.py[gene[g].pk] = k;
-              gene[g].pk++;
-              gene[g].feature.size = ccv_max(gene[g].pk, gene[g].nk);
-              g++;
-            }
-            /* add negative point */
-            if (best_gene.nk < CCV_BBF_POINT_MAX - 1)
-            {
-              gene[g] = best_gene;
-              gene[g].feature.nz[gene[g].nk] = i;
-              gene[g].feature.nx[gene[g].nk] = j;
-              gene[g].feature.ny[gene[g].nk] = k;
-              gene[g].nk++;
-              gene[g].feature.size = ccv_max(gene[g].pk, gene[g].nk);
-              g++;
-            }
-            /* refine positive point */
-            for (q = 0; q < best_gene.pk; q++)
-            {
-              gene[g] = best_gene;
-              gene[g].feature.pz[q] = i;
-              gene[g].feature.px[q] = j;
-              gene[g].feature.py[q] = k;
-              g++;
-            }
-            /* add positive point, remove negative point */
-            if (best_gene.pk < CCV_BBF_POINT_MAX - 1 && best_gene.nk > 1)
-            {
-              for (q = 0; q < best_gene.nk; q++)
-              {
-                gene[g] = best_gene;
-                gene[g].feature.pz[gene[g].pk] = i;
-                gene[g].feature.px[gene[g].pk] = j;
-                gene[g].feature.py[gene[g].pk] = k;
-                gene[g].pk++;
-                for (p = q; p < best_gene.nk - 1; p++)
-                {
-                  gene[g].feature.nz[p] = gene[g].feature.nz[p + 1];
-                  gene[g].feature.nx[p] = gene[g].feature.nx[p + 1];
-                  gene[g].feature.ny[p] = gene[g].feature.ny[p + 1];
-                }
-                gene[g].feature.nz[gene[g].nk - 1] = -1;
-                gene[g].nk--;
-                gene[g].feature.size = ccv_max(gene[g].pk, gene[g].nk);
-                g++;
-              }
-            }
-            /* refine negative point */
-            for (q = 0; q < best_gene.nk; q++)
-            {
-              gene[g] = best_gene;
-              gene[g].feature.nz[q] = i;
-              gene[g].feature.nx[q] = j;
-              gene[g].feature.ny[q] = k;
-              g++;
-            }
-            /* add negative point, remove positive point */
-            if (best_gene.pk > 1 && best_gene.nk < CCV_BBF_POINT_MAX - 1)
-            {
-              for (q = 0; q < best_gene.pk; q++)
-              {
-                gene[g] = best_gene;
-                gene[g].feature.nz[gene[g].nk] = i;
-                gene[g].feature.nx[gene[g].nk] = j;
-                gene[g].feature.ny[gene[g].nk] = k;
-                gene[g].nk++;
-                for (p = q; p < best_gene.pk - 1; p++)
-                {
-                  gene[g].feature.pz[p] = gene[g].feature.pz[p + 1];
-                  gene[g].feature.px[p] = gene[g].feature.px[p + 1];
-                  gene[g].feature.py[p] = gene[g].feature.py[p + 1];
-                }
-                gene[g].feature.pz[gene[g].pk - 1] = -1;
-                gene[g].pk--;
-                gene[g].feature.size = ccv_max(gene[g].pk, gene[g].nk);
-                g++;
-              }
-            }
-          }
-    if (best_gene.pk > 1)
-      for (q = 0; q < best_gene.pk; q++)
-      {
-        gene[g] = best_gene;
-        for (i = q; i < best_gene.pk - 1; i++)
-        {
-          gene[g].feature.pz[i] = gene[g].feature.pz[i + 1];
-          gene[g].feature.px[i] = gene[g].feature.px[i + 1];
-          gene[g].feature.py[i] = gene[g].feature.py[i + 1];
-        }
-        gene[g].feature.pz[gene[g].pk - 1] = -1;
-        gene[g].pk--;
-        gene[g].feature.size = ccv_max(gene[g].pk, gene[g].nk);
-        g++;
-      }
-    if (best_gene.nk > 1)
-      for (q = 0; q < best_gene.nk; q++)
-      {
-        gene[g] = best_gene;
-        for (i = q; i < best_gene.nk - 1; i++)
-        {
-          gene[g].feature.nz[i] = gene[g].feature.nz[i + 1];
-          gene[g].feature.nx[i] = gene[g].feature.nx[i + 1];
-          gene[g].feature.ny[i] = gene[g].feature.ny[i + 1];
-        }
-        gene[g].feature.nz[gene[g].nk - 1] = -1;
-        gene[g].nk--;
-        gene[g].feature.size = ccv_max(gene[g].pk, gene[g].nk);
-        g++;
-      }
-    gene[g] = best_gene;
-    g++;
-    PRINT(CCV_CLI_INFO, "float search round : %d\n", t);
-    ccv_bbf_gene_t local_gene = _ccv_bbf_best_gene(gene, g, CCV_BBF_POINT_MIN, posdata, posnum, negdata, negnum, size, pw, nw);
-    if (local_gene.error >= best_gene.error - 1e-10)
-      break;
-    best_gene = local_gene;
-  }
-  ccfree(gene);
-  gsl_rng_free(rng);
-  return best_gene.feature;
-}
-
-static int _ccv_write_bbf_stage_classifier(const char *file, ccv_bbf_stage_classifier_t *classifier)
-{
-  FILE *w = fopen(file, "wb");
-  if (w == 0)
-    return -1;
-  fprintf(w, "%d\n", classifier->count);
-  union {
-    float fl;
-    int i;
-  } fli;
-  fli.fl = classifier->threshold;
-  fprintf(w, "%d\n", fli.i);
-  int i, j;
-  for (i = 0; i < classifier->count; i++)
-  {
-    fprintf(w, "%d\n", classifier->feature[i].size);
-    for (j = 0; j < classifier->feature[i].size; j++)
-    {
-      fprintf(w, "%d %d %d\n", classifier->feature[i].px[j], classifier->feature[i].py[j], classifier->feature[i].pz[j]);
-      fprintf(w, "%d %d %d\n", classifier->feature[i].nx[j], classifier->feature[i].ny[j], classifier->feature[i].nz[j]);
-    }
-    union {
-      float fl;
-      int i;
-    } flia, flib;
-    flia.fl = classifier->alpha[i * 2];
-    flib.fl = classifier->alpha[i * 2 + 1];
-    fprintf(w, "%d %d\n", flia.i, flib.i);
-  }
-  fclose(w);
-  return 0;
-}
-
-static int _ccv_read_background_data(const char *file, unsigned char **negdata, int *negnum, ccv_size_t size)
-{
-  int stat = 0;
-  FILE *r = fopen(file, "rb");
-  if (r == 0)
-    return -1;
-  stat |= fread(negnum, sizeof(int), 1, r);
-  int i;
-  int isizs012 = _ccv_width_padding(size.width) * size.height +
-                 _ccv_width_padding(size.width >> 1) * (size.height >> 1) +
-                 _ccv_width_padding(size.width >> 2) * (size.height >> 2);
-  for (i = 0; i < *negnum; i++)
-  {
-    negdata[i] = (unsigned char *)ccmalloc(isizs012);
-    stat |= fread(negdata[i], 1, isizs012, r);
-  }
-  fclose(r);
-  return 0;
-}
-
-static int _ccv_write_background_data(const char *file, unsigned char **negdata, int negnum, ccv_size_t size)
-{
-  FILE *w = fopen(file, "w");
-  if (w == 0)
-    return -1;
-  fwrite(&negnum, sizeof(int), 1, w);
-  int i;
-  int isizs012 = _ccv_width_padding(size.width) * size.height +
-                 _ccv_width_padding(size.width >> 1) * (size.height >> 1) +
-                 _ccv_width_padding(size.width >> 2) * (size.height >> 2);
-  for (i = 0; i < negnum; i++)
-    fwrite(negdata[i], 1, isizs012, w);
-  fclose(w);
-  return 0;
-}
-
-static int _ccv_resume_bbf_cascade_training_state(const char *file, int *i, int *k, int *bg, double *pw, double *nw, int posnum, int negnum)
-{
-  int stat = 0;
-  FILE *r = fopen(file, "r");
-  if (r == 0)
-    return -1;
-  stat |= fscanf(r, "%d %d %d", i, k, bg);
-  int j;
-  union {
-    double db;
-    int i[2];
-  } dbi;
-  for (j = 0; j < posnum; j++)
-  {
-    stat |= fscanf(r, "%d %d", &dbi.i[0], &dbi.i[1]);
-    pw[j] = dbi.db;
-  }
-  for (j = 0; j < negnum; j++)
-  {
-    stat |= fscanf(r, "%d %d", &dbi.i[0], &dbi.i[1]);
-    nw[j] = dbi.db;
-  }
-  fclose(r);
-  return 0;
-}
-
-static int _ccv_save_bbf_cacade_training_state(const char *file, int i, int k, int bg, double *pw, double *nw, int posnum, int negnum)
-{
-  FILE *w = fopen(file, "w");
-  if (w == 0)
-    return -1;
-  fprintf(w, "%d %d %d\n", i, k, bg);
-  int j;
-  union {
-    double db;
-    int i[2];
-  } dbi;
-  for (j = 0; j < posnum; ++j)
-  {
-    dbi.db = pw[j];
-    fprintf(w, "%d %d ", dbi.i[0], dbi.i[1]);
-  }
-  fprintf(w, "\n");
-  for (j = 0; j < negnum; ++j)
-  {
-    dbi.db = nw[j];
-    fprintf(w, "%d %d ", dbi.i[0], dbi.i[1]);
-  }
-  fprintf(w, "\n");
-  fclose(w);
-  return 0;
-}
-
-void ccv_bbf_classifier_cascade_new(ccv_dense_matrix_t **posimg, int posnum, char **bgfiles, int bgnum, int negnum, ccv_size_t size, const char *dir, ccv_bbf_new_param_t params)
-{
-  int i, j, k;
-  /* allocate memory for usage */
-  ccv_bbf_classifier_cascade_t *cascade = (ccv_bbf_classifier_cascade_t *)ccmalloc(sizeof(ccv_bbf_classifier_cascade_t));
-  cascade->count = 0;
-  cascade->size = size;
-  cascade->stage_classifier = (ccv_bbf_stage_classifier_t *)ccmalloc(sizeof(ccv_bbf_stage_classifier_t));
-  unsigned char **posdata = (unsigned char **)ccmalloc(posnum * sizeof(unsigned char *));
-  unsigned char **negdata = (unsigned char **)ccmalloc(negnum * sizeof(unsigned char *));
-  double *pw = (double *)ccmalloc(posnum * sizeof(double));
-  double *nw = (double *)ccmalloc(negnum * sizeof(double));
-  float *peval = (float *)ccmalloc(posnum * sizeof(float));
-  float *neval = (float *)ccmalloc(negnum * sizeof(float));
-  double inv_balance_k = 1. / params.balance_k;
-  /* balance factor k, and weighted with 0.01 */
-  params.balance_k *= 0.01;
-  inv_balance_k *= 0.01;
-
-  int steps[] = {_ccv_width_padding(cascade->size.width),
-                 _ccv_width_padding(cascade->size.width >> 1),
-                 _ccv_width_padding(cascade->size.width >> 2)};
-  int isizs0 = steps[0] * cascade->size.height;
-  int isizs01 = isizs0 + steps[1] * (cascade->size.height >> 1);
-
-  i = 0;
-  k = 0;
-  int bg = 0;
-  int cacheK = 10;
-  /* state resume code */
-  char buf[1024];
-  sprintf(buf, "%s/stat.txt", dir);
-  _ccv_resume_bbf_cascade_training_state(buf, &i, &k, &bg, pw, nw, posnum, negnum);
-  if (i > 0)
-  {
-    cascade->count = i;
-    ccfree(cascade->stage_classifier);
-    cascade->stage_classifier = (ccv_bbf_stage_classifier_t *)ccmalloc(i * sizeof(ccv_bbf_stage_classifier_t));
-    for (j = 0; j < i; j++)
-    {
-      sprintf(buf, "%s/stage-%d.txt", dir, j);
-      _ccv_read_bbf_stage_classifier(buf, &cascade->stage_classifier[j]);
-    }
-  }
-  if (k > 0)
-    cacheK = k;
-  int rpos, rneg = 0;
-  if (bg)
-  {
-    sprintf(buf, "%s/negs.txt", dir);
-    _ccv_read_background_data(buf, negdata, &rneg, cascade->size);
-  }
-
-  for (; i < params.layer; i++)
-  {
-    if (!bg)
-    {
-      rneg = _ccv_prepare_background_data(cascade, bgfiles, bgnum, negdata, negnum);
-      /* save state of background data */
-      sprintf(buf, "%s/negs.txt", dir);
-      _ccv_write_background_data(buf, negdata, rneg, cascade->size);
-      bg = 1;
-    }
-    double totalw;
-    /* save state of cascade : level, weight etc. */
-    sprintf(buf, "%s/stat.txt", dir);
-    _ccv_save_bbf_cacade_training_state(buf, i, k, bg, pw, nw, posnum, negnum);
-    ccv_bbf_stage_classifier_t classifier;
-    if (k > 0)
-    {
-      /* resume state of classifier */
-      sprintf(buf, "%s/stage-%d.txt", dir, i);
-      _ccv_read_bbf_stage_classifier(buf, &classifier);
-    }
-    else
-    {
-      /* initialize classifier */
-      for (j = 0; j < posnum; j++)
-        pw[j] = params.balance_k;
-      for (j = 0; j < rneg; j++)
-        nw[j] = inv_balance_k;
-      classifier.count = k;
-      classifier.threshold = 0;
-      classifier.feature = (ccv_bbf_feature_t *)ccmalloc(cacheK * sizeof(ccv_bbf_feature_t));
-      classifier.alpha = (float *)ccmalloc(cacheK * 2 * sizeof(float));
-    }
-    _ccv_prepare_positive_data(posimg, posdata, cascade->size, posnum);
-    rpos = _ccv_prune_positive_data(cascade, posdata, posnum, cascade->size);
-    PRINT(CCV_CLI_INFO, "%d postivie data and %d negative data in training\n", rpos, rneg);
-    /* reweight to 1.00 */
-    totalw = 0;
-    for (j = 0; j < rpos; j++)
-      totalw += pw[j];
-    for (j = 0; j < rneg; j++)
-      totalw += nw[j];
-    for (j = 0; j < rpos; j++)
-      pw[j] = pw[j] / totalw;
-    for (j = 0; j < rneg; j++)
-      nw[j] = nw[j] / totalw;
-    for (;; k++)
-    {
-      /* get overall true-positive, false-positive rate and threshold */
-      double tp = 0, fp = 0, etp = 0, efp = 0;
-      _ccv_bbf_eval_data(&classifier, posdata, rpos, negdata, rneg, cascade->size, peval, neval);
-      _ccv_sort_32f(peval, rpos, 0);
-      classifier.threshold = peval[(int)((1. - params.pos_crit) * rpos)] - 1e-6;
-      for (j = 0; j < rpos; j++)
-      {
-        if (peval[j] >= 0)
-          ++tp;
-        if (peval[j] >= classifier.threshold)
-          ++etp;
-      }
-      tp /= rpos;
-      etp /= rpos;
-      for (j = 0; j < rneg; j++)
-      {
-        if (neval[j] >= 0)
-          ++fp;
-        if (neval[j] >= classifier.threshold)
-          ++efp;
-      }
-      fp /= rneg;
-      efp /= rneg;
-      PRINT(CCV_CLI_INFO, "stage classifier real TP rate : %f, FP rate : %f\n", tp, fp);
-      PRINT(CCV_CLI_INFO, "stage classifier TP rate : %f, FP rate : %f at threshold : %f\n", etp, efp, classifier.threshold);
-      if (k > 0)
-      {
-        /* save classifier state */
-        sprintf(buf, "%s/stage-%d.txt", dir, i);
-        _ccv_write_bbf_stage_classifier(buf, &classifier);
-        sprintf(buf, "%s/stat.txt", dir);
-        _ccv_save_bbf_cacade_training_state(buf, i, k, bg, pw, nw, posnum, negnum);
-      }
-      if (etp > params.pos_crit && efp < params.neg_crit)
-        break;
-      /* TODO: more post-process is needed in here */
-
-      /* select the best feature in current distribution through genetic algorithm optimization */
-      ccv_bbf_feature_t best;
-      if (params.optimizer == CCV_BBF_GENETIC_OPT)
-      {
-        best = _ccv_bbf_genetic_optimize(posdata, rpos, negdata, rneg, params.feature_number, cascade->size, pw, nw);
-      }
-      else if (params.optimizer == CCV_BBF_FLOAT_OPT)
-      {
-        best = _ccv_bbf_convex_optimize(posdata, rpos, negdata, rneg, 0, cascade->size, pw, nw);
-      }
-      else
-      {
-        best = _ccv_bbf_genetic_optimize(posdata, rpos, negdata, rneg, params.feature_number, cascade->size, pw, nw);
-        best = _ccv_bbf_convex_optimize(posdata, rpos, negdata, rneg, &best, cascade->size, pw, nw);
-      }
-      double err = _ccv_bbf_error_rate(&best, posdata, rpos, negdata, rneg, cascade->size, pw, nw);
-      double rw = (1 - err) / err;
-      totalw = 0;
-      /* reweight */
-      for (j = 0; j < rpos; j++)
-      {
-        unsigned char *u8[] = {posdata[j], posdata[j] + isizs0, posdata[j] + isizs01};
-        if (!_ccv_run_bbf_feature(&best, steps, u8))
-          pw[j] *= rw;
-        pw[j] *= params.balance_k;
-        totalw += pw[j];
-      }
-      for (j = 0; j < rneg; j++)
-      {
-        unsigned char *u8[] = {negdata[j], negdata[j] + isizs0, negdata[j] + isizs01};
-        if (_ccv_run_bbf_feature(&best, steps, u8))
-          nw[j] *= rw;
-        nw[j] *= inv_balance_k;
-        totalw += nw[j];
-      }
-      for (j = 0; j < rpos; j++)
-        pw[j] = pw[j] / totalw;
-      for (j = 0; j < rneg; j++)
-        nw[j] = nw[j] / totalw;
-      double c = log(rw);
-      PRINT(CCV_CLI_INFO, "coefficient of feature %d: %f\n", k + 1, c);
-      classifier.count = k + 1;
-      /* resizing classifier */
-      if (k >= cacheK)
-      {
-        ccv_bbf_feature_t *feature = (ccv_bbf_feature_t *)ccmalloc(cacheK * 2 * sizeof(ccv_bbf_feature_t));
-        memcpy(feature, classifier.feature, cacheK * sizeof(ccv_bbf_feature_t));
-        ccfree(classifier.feature);
-        float *alpha = (float *)ccmalloc(cacheK * 4 * sizeof(float));
-        memcpy(alpha, classifier.alpha, cacheK * 2 * sizeof(float));
-        ccfree(classifier.alpha);
-        classifier.feature = feature;
-        classifier.alpha = alpha;
-        cacheK *= 2;
-      }
-      /* setup new feature */
-      classifier.feature[k] = best;
-      classifier.alpha[k * 2] = -c;
-      classifier.alpha[k * 2 + 1] = c;
-    }
-    cascade->count = i + 1;
-    ccv_bbf_stage_classifier_t *stage_classifier = (ccv_bbf_stage_classifier_t *)ccmalloc(cascade->count * sizeof(ccv_bbf_stage_classifier_t));
-    memcpy(stage_classifier, cascade->stage_classifier, i * sizeof(ccv_bbf_stage_classifier_t));
-    ccfree(cascade->stage_classifier);
-    stage_classifier[i] = classifier;
-    cascade->stage_classifier = stage_classifier;
-    k = 0;
-    bg = 0;
-    for (j = 0; j < rpos; j++)
-      ccfree(posdata[j]);
-    for (j = 0; j < rneg; j++)
-      ccfree(negdata[j]);
-  }
-
-  ccfree(neval);
-  ccfree(peval);
-  ccfree(nw);
-  ccfree(pw);
-  ccfree(negdata);
-  ccfree(posdata);
-  ccfree(cascade);
-}
-#else
-void ccv_bbf_classifier_cascade_new(ccv_dense_matrix_t **posimg, int posnum, char **bgfiles, int bgnum, int negnum, ccv_size_t size, const char *dir, ccv_bbf_new_param_t params)
-{
-  fprintf(stderr, " ccv_bbf_classifier_cascade_new requires libgsl support, please compile ccv with libgsl.\n");
-}
-#endif
-
-static int _ccv_is_equal(const void *_r1, const void *_r2, void *data)
-{
-  const ccv_comp_t *r1 = (const ccv_comp_t *)_r1;
-  const ccv_comp_t *r2 = (const ccv_comp_t *)_r2;
-  int distance = (int)(r1->rect.width * 0.25 + 0.5);
-
-  return r2->rect.x <= r1->rect.x + distance &&
-         r2->rect.x >= r1->rect.x - distance &&
-         r2->rect.y <= r1->rect.y + distance &&
-         r2->rect.y >= r1->rect.y - distance &&
-         r2->rect.width <= (int)(r1->rect.width * 1.5 + 0.5) &&
-         (int)(r2->rect.width * 1.5 + 0.5) >= r1->rect.width;
-}
-
-static int _ccv_is_equal_same_class(const void *_r1, const void *_r2, void *data)
-{
-  const ccv_comp_t *r1 = (const ccv_comp_t *)_r1;
-  const ccv_comp_t *r2 = (const ccv_comp_t *)_r2;
-  int distance = (int)(r1->rect.width * 0.25 + 0.5);
-
-  return r2->classification.id == r1->classification.id &&
-         r2->rect.x <= r1->rect.x + distance &&
-         r2->rect.x >= r1->rect.x - distance &&
-         r2->rect.y <= r1->rect.y + distance &&
-         r2->rect.y >= r1->rect.y - distance &&
-         r2->rect.width <= (int)(r1->rect.width * 1.5 + 0.5) &&
-         (int)(r2->rect.width * 1.5 + 0.5) >= r1->rect.width;
-}
-
-ccv_array_t *ccv_bbf_detect_objects(ccv_dense_matrix_t *a, ccv_bbf_classifier_cascade_t **_cascade, int count, ccv_bbf_param_t params)
-{
-  int hr = a->rows / params.size.height;
-  int wr = a->cols / params.size.width;
-  double scale = pow(2., 1. / (params.interval + 1.));
-  int next = params.interval + 1;
-  int scale_upto = (int)(log((double)ccv_min(hr, wr)) / log(scale));
-  ccv_dense_matrix_t **pyr = (ccv_dense_matrix_t **)alloca((scale_upto + next * 2) * 4 * sizeof(ccv_dense_matrix_t *));
-  memset(pyr, 0, (scale_upto + next * 2) * 4 * sizeof(ccv_dense_matrix_t *));
-  if (params.size.height != _cascade[0]->size.height || params.size.width != _cascade[0]->size.width)
-    ccv_resample(a, &pyr[0], 0, a->rows * _cascade[0]->size.height / params.size.height, a->cols * _cascade[0]->size.width / params.size.width, CCV_INTER_AREA);
-  else
-    pyr[0] = a;
-  int i, j, k, t, x, y, q;
-  for (i = 1; i < ccv_min(params.interval + 1, scale_upto + next * 2); i++)
-    ccv_resample(pyr[0], &pyr[i * 4], 0, (int)(pyr[0]->rows / pow(scale, i)), (int)(pyr[0]->cols / pow(scale, i)), CCV_INTER_AREA);
-  for (i = next; i < scale_upto + next * 2; i++)
-    ccv_sample_down(pyr[i * 4 - next * 4], &pyr[i * 4], 0, 0, 0);
-  if (params.accurate)
-    for (i = next * 2; i < scale_upto + next * 2; i++)
-    {
-      ccv_sample_down(pyr[i * 4 - next * 4], &pyr[i * 4 + 1], 0, 1, 0);
-      ccv_sample_down(pyr[i * 4 - next * 4], &pyr[i * 4 + 2], 0, 0, 1);
-      ccv_sample_down(pyr[i * 4 - next * 4], &pyr[i * 4 + 3], 0, 1, 1);
-    }
-  ccv_array_t *idx_seq;
-  ccv_array_t *seq = ccv_array_new(sizeof(ccv_comp_t), 64, 0);
-  ccv_array_t *seq2 = ccv_array_new(sizeof(ccv_comp_t), 64, 0);
-  ccv_array_t *result_seq = ccv_array_new(sizeof(ccv_comp_t), 64, 0);
-  /* detect in multi scale */
-  for (t = 0; t < count; t++)
-  {
-    ccv_bbf_classifier_cascade_t *cascade = _cascade[t];
-    float scale_x = (float)params.size.width / (float)cascade->size.width;
-    float scale_y = (float)params.size.height / (float)cascade->size.height;
-    ccv_array_clear(seq);
-    for (i = 0; i < scale_upto; i++)
-    {
-      int dx[] = {0, 1, 0, 1};
-      int dy[] = {0, 0, 1, 1};
-      int i_rows = pyr[i * 4 + next * 8]->rows - (cascade->size.height >> 2);
-      int steps[] = {pyr[i * 4]->step, pyr[i * 4 + next * 4]->step, pyr[i * 4 + next * 8]->step};
-      int i_cols = pyr[i * 4 + next * 8]->cols - (cascade->size.width >> 2);
-      int paddings[] = {pyr[i * 4]->step * 4 - i_cols * 4,
-                        pyr[i * 4 + next * 4]->step * 2 - i_cols * 2,
-                        pyr[i * 4 + next * 8]->step - i_cols};
-      for (q = 0; q < (params.accurate ? 4 : 1); q++)
-      {
-        unsigned char *u8[] = {pyr[i * 4]->data.u8 + dx[q] * 2 + dy[q] * pyr[i * 4]->step * 2, pyr[i * 4 + next * 4]->data.u8 + dx[q] + dy[q] * pyr[i * 4 + next * 4]->step, pyr[i * 4 + next * 8 + q]->data.u8};
-        for (y = 0; y < i_rows; y++)
-        {
-          for (x = 0; x < i_cols; x++)
-          {
-            float sum;
-            int flag = 1;
-            ccv_bbf_stage_classifier_t *classifier = cascade->stage_classifier;
-            for (j = 0; j < cascade->count; ++j, ++classifier)
-            {
-              sum = 0;
-              float *alpha = classifier->alpha;
-              ccv_bbf_feature_t *feature = classifier->feature;
-              for (k = 0; k < classifier->count; ++k, alpha += 2, ++feature)
-                sum += alpha[_ccv_run_bbf_feature(feature, steps, u8)];
-              if (sum < classifier->threshold)
-              {
-                flag = 0;
-                break;
-              }
-            }
-            if (flag)
-            {
-              ccv_comp_t comp;
-              comp.rect = ccv_rect((int)((x * 4 + dx[q] * 2) * scale_x + 0.5), (int)((y * 4 + dy[q] * 2) * scale_y + 0.5), (int)(cascade->size.width * scale_x + 0.5), (int)(cascade->size.height * scale_y + 0.5));
-              comp.neighbors = 1;
-              comp.classification.id = t;
-              comp.classification.confidence = sum;
-              ccv_array_push(seq, &comp);
-            }
-            u8[0] += 4;
-            u8[1] += 2;
-            u8[2] += 1;
-          }
-          u8[0] += paddings[0];
-          u8[1] += paddings[1];
-          u8[2] += paddings[2];
-        }
-      }
-      scale_x *= scale;
-      scale_y *= scale;
-    }
-
-    /* the following code from OpenCV's haar feature implementation */
-    if (params.min_neighbors == 0)
-    {
-      for (i = 0; i < seq->rnum; i++)
-      {
-        ccv_comp_t *comp = (ccv_comp_t *)ccv_array_get(seq, i);
-        ccv_array_push(result_seq, comp);
-      }
-    }
-    else
-    {
-      idx_seq = 0;
-      ccv_array_clear(seq2);
-      // group retrieved rectangles in order to filter out noise
-      int ncomp = ccv_array_group(seq, &idx_seq, _ccv_is_equal_same_class, 0);
-      ccv_comp_t *comps = (ccv_comp_t *)ccmalloc((ncomp + 1) * sizeof(ccv_comp_t));
-      memset(comps, 0, (ncomp + 1) * sizeof(ccv_comp_t));
-
-      // count number of neighbors
-      for (i = 0; i < seq->rnum; i++)
-      {
-        ccv_comp_t r1 = *(ccv_comp_t *)ccv_array_get(seq, i);
-        int idx = *(int *)ccv_array_get(idx_seq, i);
-
-        if (comps[idx].neighbors == 0)
-          comps[idx].classification.confidence = r1.classification.confidence;
-
-        ++comps[idx].neighbors;
-
-        comps[idx].rect.x += r1.rect.x;
-        comps[idx].rect.y += r1.rect.y;
-        comps[idx].rect.width += r1.rect.width;
-        comps[idx].rect.height += r1.rect.height;
-        comps[idx].classification.id = r1.classification.id;
-        comps[idx].classification.confidence = ccv_max(comps[idx].classification.confidence, r1.classification.confidence);
-      }
-
-      // calculate average bounding box
-      for (i = 0; i < ncomp; i++)
-      {
-        int n = comps[i].neighbors;
-        if (n >= params.min_neighbors)
-        {
-          ccv_comp_t comp;
-          comp.rect.x = (comps[i].rect.x * 2 + n) / (2 * n);
-          comp.rect.y = (comps[i].rect.y * 2 + n) / (2 * n);
-          comp.rect.width = (comps[i].rect.width * 2 + n) / (2 * n);
-          comp.rect.height = (comps[i].rect.height * 2 + n) / (2 * n);
-          comp.neighbors = comps[i].neighbors;
-          comp.classification.id = comps[i].classification.id;
-          comp.classification.confidence = comps[i].classification.confidence;
-          ccv_array_push(seq2, &comp);
-        }
-      }
-
-      // filter out small face rectangles inside large face rectangles
-      for (i = 0; i < seq2->rnum; i++)
-      {
-        ccv_comp_t r1 = *(ccv_comp_t *)ccv_array_get(seq2, i);
-        int flag = 1;
-
-        for (j = 0; j < seq2->rnum; j++)
-        {
-          ccv_comp_t r2 = *(ccv_comp_t *)ccv_array_get(seq2, j);
-          int distance = (int)(r2.rect.width * 0.25 + 0.5);
-
-          if (i != j &&
-              r1.classification.id == r2.classification.id &&
-              r1.rect.x >= r2.rect.x - distance &&
-              r1.rect.y >= r2.rect.y - distance &&
-              r1.rect.x + r1.rect.width <= r2.rect.x + r2.rect.width + distance &&
-              r1.rect.y + r1.rect.height <= r2.rect.y + r2.rect.height + distance &&
-              (r2.neighbors > ccv_max(3, r1.neighbors) || r1.neighbors < 3))
-          {
-            flag = 0;
-            break;
-          }
-        }
-
-        if (flag)
-          ccv_array_push(result_seq, &r1);
-      }
-      ccv_array_free(idx_seq);
-      ccfree(comps);
-    }
-  }
-
-  ccv_array_free(seq);
-  ccv_array_free(seq2);
-
-  ccv_array_t *result_seq2;
-  /* the following code from OpenCV's haar feature implementation */
-  if (params.flags & CCV_BBF_NO_NESTED)
-  {
-    result_seq2 = ccv_array_new(sizeof(ccv_comp_t), 64, 0);
-    idx_seq = 0;
-    // group retrieved rectangles in order to filter out noise
-    int ncomp = ccv_array_group(result_seq, &idx_seq, _ccv_is_equal, 0);
-    ccv_comp_t *comps = (ccv_comp_t *)ccmalloc((ncomp + 1) * sizeof(ccv_comp_t));
-    memset(comps, 0, (ncomp + 1) * sizeof(ccv_comp_t));
-
-    // count number of neighbors
-    for (i = 0; i < result_seq->rnum; i++)
-    {
-      ccv_comp_t r1 = *(ccv_comp_t *)ccv_array_get(result_seq, i);
-      int idx = *(int *)ccv_array_get(idx_seq, i);
-
-      if (comps[idx].neighbors == 0 || comps[idx].classification.confidence < r1.classification.confidence)
-      {
-        comps[idx].classification.confidence = r1.classification.confidence;
-        comps[idx].neighbors = 1;
-        comps[idx].rect = r1.rect;
-        comps[idx].classification.id = r1.classification.id;
-      }
-    }
-
-    // calculate average bounding box
-    for (i = 0; i < ncomp; i++)
-      if (comps[i].neighbors)
-        ccv_array_push(result_seq2, &comps[i]);
-
-    ccv_array_free(result_seq);
-    ccfree(comps);
-  }
-  else
-  {
-    result_seq2 = result_seq;
-  }
-
-  for (i = 1; i < scale_upto + next * 2; i++)
-    ccv_matrix_free(pyr[i * 4]);
-  if (params.accurate)
-    for (i = next * 2; i < scale_upto + next * 2; i++)
-    {
-      ccv_matrix_free(pyr[i * 4 + 1]);
-      ccv_matrix_free(pyr[i * 4 + 2]);
-      ccv_matrix_free(pyr[i * 4 + 3]);
-    }
-  if (params.size.height != _cascade[0]->size.height || params.size.width != _cascade[0]->size.width)
-    ccv_matrix_free(pyr[0]);
-
-  return result_seq2;
-}
-
-ccv_bbf_classifier_cascade_t *ccv_bbf_read_classifier_cascade(const char *directory)
-{
-  char buf[1024];
-  sprintf(buf, "%s/cascade.txt", directory);
-  int s, i;
-  FILE *r = fopen(buf, "r");
-  if (r == 0)
-    return 0;
-  ccv_bbf_classifier_cascade_t *cascade = (ccv_bbf_classifier_cascade_t *)ccmalloc(sizeof(ccv_bbf_classifier_cascade_t));
-  s = fscanf(r, "%d %d %d", &cascade->count, &cascade->size.width, &cascade->size.height);
-  assert(s > 0);
-  cascade->stage_classifier = (ccv_bbf_stage_classifier_t *)ccmalloc(cascade->count * sizeof(ccv_bbf_stage_classifier_t));
-  for (i = 0; i < cascade->count; i++)
-  {
-    sprintf(buf, "%s/stage-%d.txt", directory, i);
-    if (_ccv_read_bbf_stage_classifier(buf, &cascade->stage_classifier[i]) < 0)
-    {
-      cascade->count = i;
-      break;
-    }
-  }
-  fclose(r);
-  return cascade;
-}
-
-ccv_bbf_classifier_cascade_t *ccv_bbf_classifier_cascade_read_binary(char *s)
-{
-  int i;
-  ccv_bbf_classifier_cascade_t *cascade = (ccv_bbf_classifier_cascade_t *)ccmalloc(sizeof(ccv_bbf_classifier_cascade_t));
-  memcpy(&cascade->count, s, sizeof(cascade->count));
-  s += sizeof(cascade->count);
-  memcpy(&cascade->size.width, s, sizeof(cascade->size.width));
-  s += sizeof(cascade->size.width);
-  memcpy(&cascade->size.height, s, sizeof(cascade->size.height));
-  s += sizeof(cascade->size.height);
-  ccv_bbf_stage_classifier_t *classifier = cascade->stage_classifier = (ccv_bbf_stage_classifier_t *)ccmalloc(cascade->count * sizeof(ccv_bbf_stage_classifier_t));
-  for (i = 0; i < cascade->count; i++, classifier++)
-  {
-    memcpy(&classifier->count, s, sizeof(classifier->count));
-    s += sizeof(classifier->count);
-    memcpy(&classifier->threshold, s, sizeof(classifier->threshold));
-    s += sizeof(classifier->threshold);
-    classifier->feature = (ccv_bbf_feature_t *)ccmalloc(classifier->count * sizeof(ccv_bbf_feature_t));
-    classifier->alpha = (float *)ccmalloc(classifier->count * 2 * sizeof(float));
-    memcpy(classifier->feature, s, classifier->count * sizeof(ccv_bbf_feature_t));
-    s += classifier->count * sizeof(ccv_bbf_feature_t);
-    memcpy(classifier->alpha, s, classifier->count * 2 * sizeof(float));
-    s += classifier->count * 2 * sizeof(float);
-  }
-  return cascade;
-}
-
-int ccv_bbf_classifier_cascade_write_binary(ccv_bbf_classifier_cascade_t *cascade, char *s, int slen)
-{
-  int i;
-  int len = sizeof(cascade->count) + sizeof(cascade->size.width) + sizeof(cascade->size.height);
-  ccv_bbf_stage_classifier_t *classifier = cascade->stage_classifier;
-  for (i = 0; i < cascade->count; i++, classifier++)
-    len += sizeof(classifier->count) + sizeof(classifier->threshold) + classifier->count * sizeof(ccv_bbf_feature_t) + classifier->count * 2 * sizeof(float);
-  if (slen >= len)
-  {
-    memcpy(s, &cascade->count, sizeof(cascade->count));
-    s += sizeof(cascade->count);
-    memcpy(s, &cascade->size.width, sizeof(cascade->size.width));
-    s += sizeof(cascade->size.width);
-    memcpy(s, &cascade->size.height, sizeof(cascade->size.height));
-    s += sizeof(cascade->size.height);
-    classifier = cascade->stage_classifier;
-    for (i = 0; i < cascade->count; i++, classifier++)
-    {
-      memcpy(s, &classifier->count, sizeof(classifier->count));
-      s += sizeof(classifier->count);
-      memcpy(s, &classifier->threshold, sizeof(classifier->threshold));
-      s += sizeof(classifier->threshold);
-      memcpy(s, classifier->feature, classifier->count * sizeof(ccv_bbf_feature_t));
-      s += classifier->count * sizeof(ccv_bbf_feature_t);
-      memcpy(s, classifier->alpha, classifier->count * 2 * sizeof(float));
-      s += classifier->count * 2 * sizeof(float);
-    }
-  }
-  return len;
-}
-
-void ccv_bbf_classifier_cascade_free(ccv_bbf_classifier_cascade_t *cascade)
-{
-  int i;
-  for (i = 0; i < cascade->count; ++i)
-  {
-    ccfree(cascade->stage_classifier[i].feature);
-    ccfree(cascade->stage_classifier[i].alpha);
-  }
-  ccfree(cascade->stage_classifier);
-  ccfree(cascade);
-}
\ No newline at end of file
diff --git a/test/source.c++ b/test/source.c++
deleted file mode 100644
index 6a6b390..0000000
--- a/test/source.c++
+++ /dev/null
@@ -1,1502 +0,0 @@
-#include "ccv.h"
-#include "ccv_internal.h"
-#include <sys/time.h>
-#ifdef HAVE_GSL
-#include <gsl/gsl_rng.h>
-#include <gsl/gsl_randist.h>
-#endif
-#ifdef USE_OPENMP
-#include <omp.h>
-#endif
-
-const ccv_bbf_param_t ccv_bbf_default_params = {
-  .interval = 5,
-  .min_neighbors = 2,
-  .accurate = 1,
-  .flags = 0,
-  .size = {
-    24,
-    24,
-  },
-};
-
-#define _ccv_width_padding(x) (((x) + 3) & -4)
-
-static inline int _ccv_run_bbf_feature(ccv_bbf_feature_t* feature, int* step, unsigned char** u8)
-{
-#define pf_at(i) (*(u8[feature->pz[i]] + feature->px[i] + feature->py[i] * step[feature->pz[i]]))
-#define nf_at(i) (*(u8[feature->nz[i]] + feature->nx[i] + feature->ny[i] * step[feature->nz[i]]))
-  unsigned char pmin = pf_at(0), nmax = nf_at(0);
-  /* check if every point in P > every point in N, and take a shortcut */
-  if (pmin <= nmax)
-    return 0;
-  int i;
-  for (i = 1; i < feature->size; i++)
-  {
-    if (feature->pz[i] >= 0)
-    {
-      int p = pf_at(i);
-      if (p < pmin)
-      {
-        if (p <= nmax)
-          return 0;
-        pmin = p;
-      }
-    }
-    if (feature->nz[i] >= 0)
-    {
-      int n = nf_at(i);
-      if (n > nmax)
-      {
-        if (pmin <= n)
-          return 0;
-        nmax = n;
-      }
-    }
-  }
-#undef pf_at
-#undef nf_at
-  return 1;
-}
-
-static int _ccv_read_bbf_stage_classifier(const char* file, ccv_bbf_stage_classifier_t* classifier)
-{
-  FILE* r = fopen(file, "r");
-  if (r == 0) return -1;
-  int stat = 0;
-  stat |= fscanf(r, "%d", &classifier->count);
-  union { float fl; int i; } fli;
-  stat |= fscanf(r, "%d", &fli.i);
-  classifier->threshold = fli.fl;
-  classifier->feature = (ccv_bbf_feature_t*)ccmalloc(classifier->count * sizeof(ccv_bbf_feature_t));
-  classifier->alpha = (float*)ccmalloc(classifier->count * 2 * sizeof(float));
-  int i, j;
-  for (i = 0; i < classifier->count; i++)
-  {
-    stat |= fscanf(r, "%d", &classifier->feature[i].size);
-    for (j = 0; j < classifier->feature[i].size; j++)
-    {
-      stat |= fscanf(r, "%d %d %d", &classifier->feature[i].px[j], &classifier->feature[i].py[j], &classifier->feature[i].pz[j]);
-      stat |= fscanf(r, "%d %d %d", &classifier->feature[i].nx[j], &classifier->feature[i].ny[j], &classifier->feature[i].nz[j]);
-    }
-    union { float fl; int i; } flia, flib;
-    stat |= fscanf(r, "%d %d", &flia.i, &flib.i);
-    classifier->alpha[i * 2] = flia.fl;
-    classifier->alpha[i * 2 + 1] = flib.fl;
-  }
-  fclose(r);
-  return 0;
-}
-
-#ifdef HAVE_GSL
-
-static unsigned int _ccv_bbf_time_measure()
-{
-  struct timeval tv;
-  gettimeofday(&tv, 0);
-  return tv.tv_sec * 1000000 + tv.tv_usec;
-}
-
-#define less_than(a, b, aux) ((a) < (b))
-CCV_IMPLEMENT_QSORT(_ccv_sort_32f, float, less_than)
-#undef less_than
-
-static void _ccv_bbf_eval_data(ccv_bbf_stage_classifier_t* classifier, unsigned char** posdata, int posnum, unsigned char** negdata, int negnum, ccv_size_t size, float* peval, float* neval)
-{
-  int i, j;
-  int steps[] = { _ccv_width_padding(size.width),
-          _ccv_width_padding(size.width >> 1),
-          _ccv_width_padding(size.width >> 2) };
-  int isizs0 = steps[0] * size.height;
-  int isizs01 = isizs0 + steps[1] * (size.height >> 1);
-  for (i = 0; i < posnum; i++)
-  {
-    unsigned char* u8[] = { posdata[i], posdata[i] + isizs0, posdata[i] + isizs01 };
-    float sum = 0;
-    float* alpha = classifier->alpha;
-    ccv_bbf_feature_t* feature = classifier->feature;
-    for (j = 0; j < classifier->count; ++j, alpha += 2, ++feature)
-      sum += alpha[_ccv_run_bbf_feature(feature, steps, u8)];
-    peval[i] = sum;
-  }
-  for (i = 0; i < negnum; i++)
-  {
-    unsigned char* u8[] = { negdata[i], negdata[i] + isizs0, negdata[i] + isizs01 };
-    float sum = 0;
-    float* alpha = classifier->alpha;
-    ccv_bbf_feature_t* feature = classifier->feature;
-    for (j = 0; j < classifier->count; ++j, alpha += 2, ++feature)
-      sum += alpha[_ccv_run_bbf_feature(feature, steps, u8)];
-    neval[i] = sum;
-  }
-}
-
-static int _ccv_prune_positive_data(ccv_bbf_classifier_cascade_t* cascade, unsigned char** posdata, int posnum, ccv_size_t size)
-{
-  float* peval = (float*)ccmalloc(posnum * sizeof(float));
-  int i, j, k, rpos = posnum;
-  for (i = 0; i < cascade->count; i++)
-  {
-    _ccv_bbf_eval_data(cascade->stage_classifier + i, posdata, rpos, 0, 0, size, peval, 0);
-    k = 0;
-    for (j = 0; j < rpos; j++)
-      if (peval[j] >= cascade->stage_classifier[i].threshold)
-      {
-        posdata[k] = posdata[j];
-        ++k;
-      } else {
-        ccfree(posdata[j]);
-      }
-    rpos = k;
-  }
-  ccfree(peval);
-  return rpos;
-}
-
-static int _ccv_prepare_background_data(ccv_bbf_classifier_cascade_t* cascade, char** bgfiles, int bgnum, unsigned char** negdata, int negnum)
-{
-  int t, i, j, k, q;
-  int negperbg;
-  int negtotal = 0;
-  int steps[] = { _ccv_width_padding(cascade->size.width),
-          _ccv_width_padding(cascade->size.width >> 1),
-          _ccv_width_padding(cascade->size.width >> 2) };
-  int isizs0 = steps[0] * cascade->size.height;
-  int isizs1 = steps[1] * (cascade->size.height >> 1);
-  int isizs2 = steps[2] * (cascade->size.height >> 2);
-  int* idcheck = (int*)ccmalloc(negnum * sizeof(int));
-
-  gsl_rng_env_setup();
-
-  gsl_rng* rng = gsl_rng_alloc(gsl_rng_default);
-  gsl_rng_set(rng, (unsigned long int)idcheck);
-
-  ccv_size_t imgsz = cascade->size;
-  int rneg = negtotal;
-  for (t = 0; negtotal < negnum; t++)
-  {
-    PRINT(CCV_CLI_INFO, "preparing negative data ...  0%%");
-    for (i = 0; i < bgnum; i++)
-    {
-      negperbg = (t < 2) ? (negnum - negtotal) / (bgnum - i) + 1 : negnum - negtotal;
-      ccv_dense_matrix_t* image = 0;
-      ccv_read(bgfiles[i], &image, CCV_IO_GRAY | CCV_IO_ANY_FILE);
-      assert((image->type & CCV_C1) && (image->type & CCV_8U));
-      if (image == 0)
-      {
-        PRINT(CCV_CLI_ERROR, "\n%s file corrupted\n", bgfiles[i]);
-        continue;
-      }
-      if (t % 2 != 0)
-        ccv_flip(image, 0, 0, CCV_FLIP_X);
-      if (t % 4 >= 2)
-        ccv_flip(image, 0, 0, CCV_FLIP_Y);
-      ccv_bbf_param_t params = { .interval = 3, .min_neighbors = 0, .accurate = 1, .flags = 0, .size = cascade->size };
-      ccv_array_t* detected = ccv_bbf_detect_objects(image, &cascade, 1, params);
-      memset(idcheck, 0, ccv_min(detected->rnum, negperbg) * sizeof(int));
-      for (j = 0; j < ccv_min(detected->rnum, negperbg); j++)
-      {
-        int r = gsl_rng_uniform_int(rng, detected->rnum);
-        int flag = 1;
-        ccv_rect_t* rect = (ccv_rect_t*)ccv_array_get(detected, r);
-        while (flag) {
-          flag = 0;
-          for (k = 0; k < j; k++)
-            if (r == idcheck[k])
-            {
-              flag = 1;
-              r = gsl_rng_uniform_int(rng, detected->rnum);
-              break;
-            }
-          rect = (ccv_rect_t*)ccv_array_get(detected, r);
-          if ((rect->x < 0) || (rect->y < 0) || (rect->width + rect->x > image->cols) || (rect->height + rect->y > image->rows))
-          {
-            flag = 1;
-            r = gsl_rng_uniform_int(rng, detected->rnum);
-          }
-        }
-        idcheck[j] = r;
-        ccv_dense_matrix_t* temp = 0;
-        ccv_dense_matrix_t* imgs0 = 0;
-        ccv_dense_matrix_t* imgs1 = 0;
-        ccv_dense_matrix_t* imgs2 = 0;
-        ccv_slice(image, (ccv_matrix_t**)&temp, 0, rect->y, rect->x, rect->height, rect->width);
-        ccv_resample(temp, &imgs0, 0, imgsz.height, imgsz.width, CCV_INTER_AREA);
-        assert(imgs0->step == steps[0]);
-        ccv_matrix_free(temp);
-        ccv_sample_down(imgs0, &imgs1, 0, 0, 0);
-        assert(imgs1->step == steps[1]);
-        ccv_sample_down(imgs1, &imgs2, 0, 0, 0);
-        assert(imgs2->step == steps[2]);
-
-        negdata[negtotal] = (unsigned char*)ccmalloc(isizs0 + isizs1 + isizs2);
-        unsigned char* u8s0 = negdata[negtotal];
-        unsigned char* u8s1 = negdata[negtotal] + isizs0;
-        unsigned char* u8s2 = negdata[negtotal] + isizs0 + isizs1;
-        unsigned char* u8[] = { u8s0, u8s1, u8s2 };
-        memcpy(u8s0, imgs0->data.u8, imgs0->rows * imgs0->step);
-        ccv_matrix_free(imgs0);
-        memcpy(u8s1, imgs1->data.u8, imgs1->rows * imgs1->step);
-        ccv_matrix_free(imgs1);
-        memcpy(u8s2, imgs2->data.u8, imgs2->rows * imgs2->step);
-        ccv_matrix_free(imgs2);
-
-        flag = 1;
-        ccv_bbf_stage_classifier_t* classifier = cascade->stage_classifier;
-        for (k = 0; k < cascade->count; ++k, ++classifier)
-        {
-          float sum = 0;
-          float* alpha = classifier->alpha;
-          ccv_bbf_feature_t* feature = classifier->feature;
-          for (q = 0; q < classifier->count; ++q, alpha += 2, ++feature)
-            sum += alpha[_ccv_run_bbf_feature(feature, steps, u8)];
-          if (sum < classifier->threshold)
-          {
-            flag = 0;
-            break;
-          }
-        }
-        if (!flag)
-          ccfree(negdata[negtotal]);
-        else {
-          ++negtotal;
-          if (negtotal >= negnum)
-            break;
-        }
-      }
-      ccv_array_free(detected);
-      ccv_matrix_free(image);
-      ccv_drain_cache();
-      PRINT(CCV_CLI_INFO, "\rpreparing negative data ... %2d%%", 100 * negtotal / negnum);
-      fflush(0);
-      if (negtotal >= negnum)
-        break;
-    }
-    if (rneg == negtotal)
-      break;
-    rneg = negtotal;
-    PRINT(CCV_CLI_INFO, "\nentering additional round %d\n", t + 1);
-  }
-  gsl_rng_free(rng);
-  ccfree(idcheck);
-  ccv_drain_cache();
-  PRINT(CCV_CLI_INFO, "\n");
-  return negtotal;
-}
-
-static void _ccv_prepare_positive_data(ccv_dense_matrix_t** posimg, unsigned char** posdata, ccv_size_t size, int posnum)
-{
-  PRINT(CCV_CLI_INFO, "preparing positive data ...  0%%");
-  int i;
-  for (i = 0; i < posnum; i++)
-  {
-    ccv_dense_matrix_t* imgs0 = posimg[i];
-    ccv_dense_matrix_t* imgs1 = 0;
-    ccv_dense_matrix_t* imgs2 = 0;
-    assert((imgs0->type & CCV_C1) && (imgs0->type & CCV_8U) && imgs0->rows == size.height && imgs0->cols == size.width);
-    ccv_sample_down(imgs0, &imgs1, 0, 0, 0);
-    ccv_sample_down(imgs1, &imgs2, 0, 0, 0);
-    int isizs0 = imgs0->rows * imgs0->step;
-    int isizs1 = imgs1->rows * imgs1->step;
-    int isizs2 = imgs2->rows * imgs2->step;
-
-    posdata[i] = (unsigned char*)ccmalloc(isizs0 + isizs1 + isizs2);
-    memcpy(posdata[i], imgs0->data.u8, isizs0);
-    memcpy(posdata[i] + isizs0, imgs1->data.u8, isizs1);
-    memcpy(posdata[i] + isizs0 + isizs1, imgs2->data.u8, isizs2);
-
-    PRINT(CCV_CLI_INFO, "\rpreparing positive data ... %2d%%", 100 * (i + 1) / posnum);
-    fflush(0);
-
-    ccv_matrix_free(imgs1);
-    ccv_matrix_free(imgs2);
-  }
-  ccv_drain_cache();
-  PRINT(CCV_CLI_INFO, "\n");
-}
-
-typedef struct {
-  double fitness;
-  int pk, nk;
-  int age;
-  double error;
-  ccv_bbf_feature_t feature;
-} ccv_bbf_gene_t;
-
-static inline void _ccv_bbf_genetic_fitness(ccv_bbf_gene_t* gene)
-{
-  gene->fitness = (1 - gene->error) * exp(-0.01 * gene->age) * exp((gene->pk + gene->nk) * log(1.015));
-}
-
-static inline int _ccv_bbf_exist_gene_feature(ccv_bbf_gene_t* gene, int x, int y, int z)
-{
-  int i;
-  for (i = 0; i < gene->pk; i++)
-    if (z == gene->feature.pz[i] && x == gene->feature.px[i] && y == gene->feature.py[i])
-      return 1;
-  for (i = 0; i < gene->nk; i++)
-    if (z == gene->feature.nz[i] && x == gene->feature.nx[i] && y == gene->feature.ny[i])
-      return 1;
-  return 0;
-}
-
-static inline void _ccv_bbf_randomize_gene(gsl_rng* rng, ccv_bbf_gene_t* gene, int* rows, int* cols)
-{
-  int i;
-  do {
-    gene->pk = gsl_rng_uniform_int(rng, CCV_BBF_POINT_MAX - 1) + 1;
-    gene->nk = gsl_rng_uniform_int(rng, CCV_BBF_POINT_MAX - 1) + 1;
-  } while (gene->pk + gene->nk < CCV_BBF_POINT_MIN); /* a hard restriction of at least 3 points have to be examed */
-  gene->feature.size = ccv_max(gene->pk, gene->nk);
-  gene->age = 0;
-  for (i = 0; i < CCV_BBF_POINT_MAX; i++)
-  {
-    gene->feature.pz[i] = -1;
-    gene->feature.nz[i] = -1;
-  }
-  int x, y, z;
-  for (i = 0; i < gene->pk; i++)
-  {
-    do {
-      z = gsl_rng_uniform_int(rng, 3);
-      x = gsl_rng_uniform_int(rng, cols[z]);
-      y = gsl_rng_uniform_int(rng, rows[z]);
-    } while (_ccv_bbf_exist_gene_feature(gene, x, y, z));
-    gene->feature.pz[i] = z;
-    gene->feature.px[i] = x;
-    gene->feature.py[i] = y;
-  }
-  for (i = 0; i < gene->nk; i++)
-  {
-    do {
-      z = gsl_rng_uniform_int(rng, 3);
-      x = gsl_rng_uniform_int(rng, cols[z]);
-      y = gsl_rng_uniform_int(rng, rows[z]);
-    } while ( _ccv_bbf_exist_gene_feature(gene, x, y, z));
-    gene->feature.nz[i] = z;
-    gene->feature.nx[i] = x;
-    gene->feature.ny[i] = y;
-  }
-}
-
-static inline double _ccv_bbf_error_rate(ccv_bbf_feature_t* feature, unsigned char** posdata, int posnum, unsigned char** negdata, int negnum, ccv_size_t size, double* pw, double* nw)
-{
-  int i;
-  int steps[] = { _ccv_width_padding(size.width),
-          _ccv_width_padding(size.width >> 1),
-          _ccv_width_padding(size.width >> 2) };
-  int isizs0 = steps[0] * size.height;
-  int isizs01 = isizs0 + steps[1] * (size.height >> 1);
-  double error = 0;
-  for (i = 0; i < posnum; i++)
-  {
-    unsigned char* u8[] = { posdata[i], posdata[i] + isizs0, posdata[i] + isizs01 };
-    if (!_ccv_run_bbf_feature(feature, steps, u8))
-      error += pw[i];
-  }
-  for (i = 0; i < negnum; i++)
-  {
-    unsigned char* u8[] = { negdata[i], negdata[i] + isizs0, negdata[i] + isizs01 };
-    if ( _ccv_run_bbf_feature(feature, steps, u8))
-      error += nw[i];
-  }
-  return error;
-}
-
-#define less_than(fit1, fit2, aux) ((fit1).fitness >= (fit2).fitness)
-static CCV_IMPLEMENT_QSORT(_ccv_bbf_genetic_qsort, ccv_bbf_gene_t, less_than)
-#undef less_than
-
-static ccv_bbf_feature_t _ccv_bbf_genetic_optimize(unsigned char** posdata, int posnum, unsigned char** negdata, int negnum, int ftnum, ccv_size_t size, double* pw, double* nw)
-{
-  ccv_bbf_feature_t best;
-  /* seed (random method) */
-  gsl_rng_env_setup();
-  gsl_rng* rng = gsl_rng_alloc(gsl_rng_default);
-  union { unsigned long int li; double db; } dbli;
-  dbli.db = pw[0] + nw[0];
-  gsl_rng_set(rng, dbli.li);
-  int i, j;
-  int pnum = ftnum * 100;
-  assert(pnum > 0);
-  ccv_bbf_gene_t* gene = (ccv_bbf_gene_t*)ccmalloc(pnum * sizeof(ccv_bbf_gene_t));
-  int rows[] = { size.height, size.height >> 1, size.height >> 2 };
-  int cols[] = { size.width, size.width >> 1, size.width >> 2 };
-  for (i = 0; i < pnum; i++)
-    _ccv_bbf_randomize_gene(rng, &gene[i], rows, cols);
-  unsigned int timer = _ccv_bbf_time_measure();
-#ifdef USE_OPENMP
-#pragma omp parallel for private(i) schedule(dynamic)
-#endif
-  for (i = 0; i < pnum; i++)
-    gene[i].error = _ccv_bbf_error_rate(&gene[i].feature, posdata, posnum, negdata, negnum, size, pw, nw);
-  timer = _ccv_bbf_time_measure() - timer;
-  for (i = 0; i < pnum; i++)
-    _ccv_bbf_genetic_fitness(&gene[i]);
-  double best_err = 1;
-  int rnum = ftnum * 39; /* number of randomize */
-  int mnum = ftnum * 40; /* number of mutation */
-  int hnum = ftnum * 20; /* number of hybrid */
-  /* iteration stop crit : best no change in 40 iterations */
-  int it = 0, t;
-  for (t = 0 ; it < 40; ++it, ++t)
-  {
-    int min_id = 0;
-    double min_err = gene[0].error;
-    for (i = 1; i < pnum; i++)
-      if (gene[i].error < min_err)
-      {
-        min_id = i;
-        min_err = gene[i].error;
-      }
-    min_err = gene[min_id].error = _ccv_bbf_error_rate(&gene[min_id].feature, posdata, posnum, negdata, negnum, size, pw, nw);
-    if (min_err < best_err)
-    {
-      best_err = min_err;
-      memcpy(&best, &gene[min_id].feature, sizeof(best));
-      PRINT(CCV_CLI_INFO, "best bbf feature with error %f\n|-size: %d\n|-positive point: ", best_err, best.size);
-      for (i = 0; i < best.size; i++)
-        PRINT(CCV_CLI_INFO, "(%d %d %d), ", best.px[i], best.py[i], best.pz[i]);
-      PRINT(CCV_CLI_INFO, "\n|-negative point: ");
-      for (i = 0; i < best.size; i++)
-        PRINT(CCV_CLI_INFO, "(%d %d %d), ", best.nx[i], best.ny[i], best.nz[i]);
-      PRINT(CCV_CLI_INFO, "\n");
-      it = 0;
-    }
-    PRINT(CCV_CLI_INFO, "minimum error achieved in round %d(%d) : %f with %d ms\n", t, it, min_err, timer / 1000);
-    _ccv_bbf_genetic_qsort(gene, pnum, 0);
-    for (i = 0; i < ftnum; i++)
-      ++gene[i].age;
-    for (i = ftnum; i < ftnum + mnum; i++)
-    {
-      int parent = gsl_rng_uniform_int(rng, ftnum);
-      memcpy(gene + i, gene + parent, sizeof(ccv_bbf_gene_t));
-      /* three mutation strategy : 1. add, 2. remove, 3. refine */
-      int pnm, pn = gsl_rng_uniform_int(rng, 2);
-      int* pnk[] = { &gene[i].pk, &gene[i].nk };
-      int* pnx[] = { gene[i].feature.px, gene[i].feature.nx };
-      int* pny[] = { gene[i].feature.py, gene[i].feature.ny };
-      int* pnz[] = { gene[i].feature.pz, gene[i].feature.nz };
-      int x, y, z;
-      int victim, decay = 1;
-      do {
-        switch (gsl_rng_uniform_int(rng, 3))
-        {
-          case 0: /* add */
-            if (gene[i].pk == CCV_BBF_POINT_MAX && gene[i].nk == CCV_BBF_POINT_MAX)
-              break;
-            while (*pnk[pn] + 1 > CCV_BBF_POINT_MAX)
-              pn = gsl_rng_uniform_int(rng, 2);
-            do {
-              z = gsl_rng_uniform_int(rng, 3);
-              x = gsl_rng_uniform_int(rng, cols[z]);
-              y = gsl_rng_uniform_int(rng, rows[z]);
-            } while (_ccv_bbf_exist_gene_feature(&gene[i], x, y, z));
-            pnz[pn][*pnk[pn]] = z;
-            pnx[pn][*pnk[pn]] = x;
-            pny[pn][*pnk[pn]] = y;
-            ++(*pnk[pn]);
-            gene[i].feature.size = ccv_max(gene[i].pk, gene[i].nk);
-            decay = gene[i].age = 0;
-            break;
-          case 1: /* remove */
-            if (gene[i].pk + gene[i].nk <= CCV_BBF_POINT_MIN) /* at least 3 points have to be examed */
-              break;
-            while (*pnk[pn] - 1 <= 0) // || *pnk[pn] + *pnk[!pn] - 1 < CCV_BBF_POINT_MIN)
-              pn = gsl_rng_uniform_int(rng, 2);
-            victim = gsl_rng_uniform_int(rng, *pnk[pn]);
-            for (j = victim; j < *pnk[pn] - 1; j++)
-            {
-              pnz[pn][j] = pnz[pn][j + 1];
-              pnx[pn][j] = pnx[pn][j + 1];
-              pny[pn][j] = pny[pn][j + 1];
-            }
-            pnz[pn][*pnk[pn] - 1] = -1;
-            --(*pnk[pn]);
-            gene[i].feature.size = ccv_max(gene[i].pk, gene[i].nk);
-            decay = gene[i].age = 0;
-            break;
-          case 2: /* refine */
-            pnm = gsl_rng_uniform_int(rng, *pnk[pn]);
-            do {
-              z = gsl_rng_uniform_int(rng, 3);
-              x = gsl_rng_uniform_int(rng, cols[z]);
-              y = gsl_rng_uniform_int(rng, rows[z]);
-            } while (_ccv_bbf_exist_gene_feature(&gene[i], x, y, z));
-            pnz[pn][pnm] = z;
-            pnx[pn][pnm] = x;
-            pny[pn][pnm] = y;
-            decay = gene[i].age = 0;
-            break;
-        }
-      } while (decay);
-    }
-    for (i = ftnum + mnum; i < ftnum + mnum + hnum; i++)
-    {
-      /* hybrid strategy: taking positive points from dad, negative points from mum */
-      int dad, mum;
-      do {
-        dad = gsl_rng_uniform_int(rng, ftnum);
-        mum = gsl_rng_uniform_int(rng, ftnum);
-      } while (dad == mum || gene[dad].pk + gene[mum].nk < CCV_BBF_POINT_MIN); /* at least 3 points have to be examed */
-      for (j = 0; j < CCV_BBF_POINT_MAX; j++)
-      {
-        gene[i].feature.pz[j] = -1;
-        gene[i].feature.nz[j] = -1;
-      }
-      gene[i].pk = gene[dad].pk;
-      for (j = 0; j < gene[i].pk; j++)
-      {
-        gene[i].feature.pz[j] = gene[dad].feature.pz[j];
-        gene[i].feature.px[j] = gene[dad].feature.px[j];
-        gene[i].feature.py[j] = gene[dad].feature.py[j];
-      }
-      gene[i].nk = gene[mum].nk;
-      for (j = 0; j < gene[i].nk; j++)
-      {
-        gene[i].feature.nz[j] = gene[mum].feature.nz[j];
-        gene[i].feature.nx[j] = gene[mum].feature.nx[j];
-        gene[i].feature.ny[j] = gene[mum].feature.ny[j];
-      }
-      gene[i].feature.size = ccv_max(gene[i].pk, gene[i].nk);
-      gene[i].age = 0;
-    }
-    for (i = ftnum + mnum + hnum; i < ftnum + mnum + hnum + rnum; i++)
-      _ccv_bbf_randomize_gene(rng, &gene[i], rows, cols);
-    timer = _ccv_bbf_time_measure();
-#ifdef USE_OPENMP
-#pragma omp parallel for private(i) schedule(dynamic)
-#endif
-    for (i = 0; i < pnum; i++)
-      gene[i].error = _ccv_bbf_error_rate(&gene[i].feature, posdata, posnum, negdata, negnum, size, pw, nw);
-    timer = _ccv_bbf_time_measure() - timer;
-    for (i = 0; i < pnum; i++)
-      _ccv_bbf_genetic_fitness(&gene[i]);
-  }
-  ccfree(gene);
-  gsl_rng_free(rng);
-  return best;
-}
-
-#define less_than(fit1, fit2, aux) ((fit1).error < (fit2).error)
-static CCV_IMPLEMENT_QSORT(_ccv_bbf_best_qsort, ccv_bbf_gene_t, less_than)
-#undef less_than
-
-static ccv_bbf_gene_t _ccv_bbf_best_gene(ccv_bbf_gene_t* gene, int pnum, int point_min, unsigned char** posdata, int posnum, unsigned char** negdata, int negnum, ccv_size_t size, double* pw, double* nw)
-{
-  int i;
-  unsigned int timer = _ccv_bbf_time_measure();
-#ifdef USE_OPENMP
-#pragma omp parallel for private(i) schedule(dynamic)
-#endif
-  for (i = 0; i < pnum; i++)
-    gene[i].error = _ccv_bbf_error_rate(&gene[i].feature, posdata, posnum, negdata, negnum, size, pw, nw);
-  timer = _ccv_bbf_time_measure() - timer;
-  _ccv_bbf_best_qsort(gene, pnum, 0);
-  int min_id = 0;
-  double min_err = gene[0].error;
-  for (i = 0; i < pnum; i++)
-    if (gene[i].nk + gene[i].pk >= point_min)
-    {
-      min_id = i;
-      min_err = gene[i].error;
-      break;
-    }
-  PRINT(CCV_CLI_INFO, "local best bbf feature with error %f\n|-size: %d\n|-positive point: ", min_err, gene[min_id].feature.size);
-  for (i = 0; i < gene[min_id].feature.size; i++)
-    PRINT(CCV_CLI_INFO, "(%d %d %d), ", gene[min_id].feature.px[i], gene[min_id].feature.py[i], gene[min_id].feature.pz[i]);
-  PRINT(CCV_CLI_INFO, "\n|-negative point: ");
-  for (i = 0; i < gene[min_id].feature.size; i++)
-    PRINT(CCV_CLI_INFO, "(%d %d %d), ", gene[min_id].feature.nx[i], gene[min_id].feature.ny[i], gene[min_id].feature.nz[i]);
-  PRINT(CCV_CLI_INFO, "\nthe computation takes %d ms\n", timer / 1000);
-  return gene[min_id];
-}
-
-static ccv_bbf_feature_t _ccv_bbf_convex_optimize(unsigned char** posdata, int posnum, unsigned char** negdata, int negnum, ccv_bbf_feature_t* best_feature, ccv_size_t size, double* pw, double* nw)
-{
-  ccv_bbf_gene_t best_gene;
-  /* seed (random method) */
-  gsl_rng_env_setup();
-  gsl_rng* rng = gsl_rng_alloc(gsl_rng_default);
-  union { unsigned long int li; double db; } dbli;
-  dbli.db = pw[0] + nw[0];
-  gsl_rng_set(rng, dbli.li);
-  int i, j, k, q, p, g, t;
-  int rows[] = { size.height, size.height >> 1, size.height >> 2 };
-  int cols[] = { size.width, size.width >> 1, size.width >> 2 };
-  int pnum = rows[0] * cols[0] + rows[1] * cols[1] + rows[2] * cols[2];
-  ccv_bbf_gene_t* gene = (ccv_bbf_gene_t*)ccmalloc((pnum * (CCV_BBF_POINT_MAX * 2 + 1) * 2 + CCV_BBF_POINT_MAX * 2 + 1) * sizeof(ccv_bbf_gene_t));
-  if (best_feature == 0)
-  {
-    /* bootstrapping the best feature, start from two pixels, one for positive, one for negative
-     * the bootstrapping process go like this: first, it will assign a random pixel as positive
-     * and enumerate every possible pixel as negative, and pick the best one. Then, enumerate every
-     * possible pixel as positive, and pick the best one, until it converges */
-    memset(&best_gene, 0, sizeof(ccv_bbf_gene_t));
-    for (i = 0; i < CCV_BBF_POINT_MAX; i++)
-      best_gene.feature.pz[i] = best_gene.feature.nz[i] = -1;
-    best_gene.pk = 1;
-    best_gene.nk = 0;
-    best_gene.feature.size = 1;
-    best_gene.feature.pz[0] = gsl_rng_uniform_int(rng, 3);
-    best_gene.feature.px[0] = gsl_rng_uniform_int(rng, cols[best_gene.feature.pz[0]]);
-    best_gene.feature.py[0] = gsl_rng_uniform_int(rng, rows[best_gene.feature.pz[0]]);
-    for (t = 0; ; ++t)
-    {
-      g = 0;
-      if (t % 2 == 0)
-      {
-        for (i = 0; i < 3; i++)
-          for (j = 0; j < cols[i]; j++)
-            for (k = 0; k < rows[i]; k++)
-              if (i != best_gene.feature.pz[0] || j != best_gene.feature.px[0] || k != best_gene.feature.py[0])
-              {
-                gene[g] = best_gene;
-                gene[g].pk = gene[g].nk = 1;
-                gene[g].feature.nz[0] = i;
-                gene[g].feature.nx[0] = j;
-                gene[g].feature.ny[0] = k;
-                g++;
-              }
-      } else {
-        for (i = 0; i < 3; i++)
-          for (j = 0; j < cols[i]; j++)
-            for (k = 0; k < rows[i]; k++)
-              if (i != best_gene.feature.nz[0] || j != best_gene.feature.nx[0] || k != best_gene.feature.ny[0])
-              {
-                gene[g] = best_gene;
-                gene[g].pk = gene[g].nk = 1;
-                gene[g].feature.pz[0] = i;
-                gene[g].feature.px[0] = j;
-                gene[g].feature.py[0] = k;
-                g++;
-              }
-      }
-      PRINT(CCV_CLI_INFO, "bootstrapping round : %d\n", t);
-      ccv_bbf_gene_t local_gene = _ccv_bbf_best_gene(gene, g, 2, posdata, posnum, negdata, negnum, size, pw, nw);
-      if (local_gene.error >= best_gene.error - 1e-10)
-        break;
-      best_gene = local_gene;
-    }
-  } else {
-    best_gene.feature = *best_feature;
-    best_gene.pk = best_gene.nk = best_gene.feature.size;
-    for (i = 0; i < CCV_BBF_POINT_MAX; i++)
-      if (best_feature->pz[i] == -1)
-      {
-        best_gene.pk = i;
-        break;
-      }
-    for (i = 0; i < CCV_BBF_POINT_MAX; i++)
-      if (best_feature->nz[i] == -1)
-      {
-        best_gene.nk = i;
-        break;
-      }
-  }
-  /* after bootstrapping, the float search technique will do the following permutations:
-   * a). add a new point to positive or negative
-   * b). remove a point from positive or negative
-   * c). move an existing point in positive or negative to another position
-   * the three rules applied exhaustively, no heuristic used. */
-  for (t = 0; ; ++t)
-  {
-    g = 0;
-    for (i = 0; i < 3; i++)
-      for (j = 0; j < cols[i]; j++)
-        for (k = 0; k < rows[i]; k++)
-          if (!_ccv_bbf_exist_gene_feature(&best_gene, j, k, i))
-          {
-            /* add positive point */
-            if (best_gene.pk < CCV_BBF_POINT_MAX - 1)
-            {
-              gene[g] = best_gene;
-              gene[g].feature.pz[gene[g].pk] = i;
-              gene[g].feature.px[gene[g].pk] = j;
-              gene[g].feature.py[gene[g].pk] = k;
-              gene[g].pk++;
-              gene[g].feature.size = ccv_max(gene[g].pk, gene[g].nk);
-              g++;
-            }
-            /* add negative point */
-            if (best_gene.nk < CCV_BBF_POINT_MAX - 1)
-            {
-              gene[g] = best_gene;
-              gene[g].feature.nz[gene[g].nk] = i;
-              gene[g].feature.nx[gene[g].nk] = j;
-              gene[g].feature.ny[gene[g].nk] = k;
-              gene[g].nk++;
-              gene[g].feature.size = ccv_max(gene[g].pk, gene[g].nk);
-              g++;
-            }
-            /* refine positive point */
-            for (q = 0; q < best_gene.pk; q++)
-            {
-              gene[g] = best_gene;
-              gene[g].feature.pz[q] = i;
-              gene[g].feature.px[q] = j;
-              gene[g].feature.py[q] = k;
-              g++;
-            }
-            /* add positive point, remove negative point */
-            if (best_gene.pk < CCV_BBF_POINT_MAX - 1 && best_gene.nk > 1)
-            {
-              for (q = 0; q < best_gene.nk; q++)
-              {
-                gene[g] = best_gene;
-                gene[g].feature.pz[gene[g].pk] = i;
-                gene[g].feature.px[gene[g].pk] = j;
-                gene[g].feature.py[gene[g].pk] = k;
-                gene[g].pk++;
-                for (p = q; p < best_gene.nk - 1; p++)
-                {
-                  gene[g].feature.nz[p] = gene[g].feature.nz[p + 1];
-                  gene[g].feature.nx[p] = gene[g].feature.nx[p + 1];
-                  gene[g].feature.ny[p] = gene[g].feature.ny[p + 1];
-                }
-                gene[g].feature.nz[gene[g].nk - 1] = -1;
-                gene[g].nk--;
-                gene[g].feature.size = ccv_max(gene[g].pk, gene[g].nk);
-                g++;
-              }
-            }
-            /* refine negative point */
-            for (q = 0; q < best_gene.nk; q++)
-            {
-              gene[g] = best_gene;
-              gene[g].feature.nz[q] = i;
-              gene[g].feature.nx[q] = j;
-              gene[g].feature.ny[q] = k;
-              g++;
-            }
-            /* add negative point, remove positive point */
-            if (best_gene.pk > 1 && best_gene.nk < CCV_BBF_POINT_MAX - 1)
-            {
-              for (q = 0; q < best_gene.pk; q++)
-              {
-                gene[g] = best_gene;
-                gene[g].feature.nz[gene[g].nk] = i;
-                gene[g].feature.nx[gene[g].nk] = j;
-                gene[g].feature.ny[gene[g].nk] = k;
-                gene[g].nk++;
-                for (p = q; p < best_gene.pk - 1; p++)
-                {
-                  gene[g].feature.pz[p] = gene[g].feature.pz[p + 1];
-                  gene[g].feature.px[p] = gene[g].feature.px[p + 1];
-                  gene[g].feature.py[p] = gene[g].feature.py[p + 1];
-                }
-                gene[g].feature.pz[gene[g].pk - 1] = -1;
-                gene[g].pk--;
-                gene[g].feature.size = ccv_max(gene[g].pk, gene[g].nk);
-                g++;
-              }
-            }
-          }
-    if (best_gene.pk > 1)
-      for (q = 0; q < best_gene.pk; q++)
-      {
-        gene[g] = best_gene;
-        for (i = q; i < best_gene.pk - 1; i++)
-        {
-          gene[g].feature.pz[i] = gene[g].feature.pz[i + 1];
-          gene[g].feature.px[i] = gene[g].feature.px[i + 1];
-          gene[g].feature.py[i] = gene[g].feature.py[i + 1];
-        }
-        gene[g].feature.pz[gene[g].pk - 1] = -1;
-        gene[g].pk--;
-        gene[g].feature.size = ccv_max(gene[g].pk, gene[g].nk);
-        g++;
-      }
-    if (best_gene.nk > 1)
-      for (q = 0; q < best_gene.nk; q++)
-      {
-        gene[g] = best_gene;
-        for (i = q; i < best_gene.nk - 1; i++)
-        {
-          gene[g].feature.nz[i] = gene[g].feature.nz[i + 1];
-          gene[g].feature.nx[i] = gene[g].feature.nx[i + 1];
-          gene[g].feature.ny[i] = gene[g].feature.ny[i + 1];
-        }
-        gene[g].feature.nz[gene[g].nk - 1] = -1;
-        gene[g].nk--;
-        gene[g].feature.size = ccv_max(gene[g].pk, gene[g].nk);
-        g++;
-      }
-    gene[g] = best_gene;
-    g++;
-    PRINT(CCV_CLI_INFO, "float search round : %d\n", t);
-    ccv_bbf_gene_t local_gene = _ccv_bbf_best_gene(gene, g, CCV_BBF_POINT_MIN, posdata, posnum, negdata, negnum, size, pw, nw);
-    if (local_gene.error >= best_gene.error - 1e-10)
-      break;
-    best_gene = local_gene;
-  }
-  ccfree(gene);
-  gsl_rng_free(rng);
-  return best_gene.feature;
-}
-
-static int _ccv_write_bbf_stage_classifier(const char* file, ccv_bbf_stage_classifier_t* classifier)
-{
-  FILE* w = fopen(file, "wb");
-  if (w == 0) return -1;
-  fprintf(w, "%d\n", classifier->count);
-  union { float fl; int i; } fli;
-  fli.fl = classifier->threshold;
-  fprintf(w, "%d\n", fli.i);
-  int i, j;
-  for (i = 0; i < classifier->count; i++)
-  {
-    fprintf(w, "%d\n", classifier->feature[i].size);
-    for (j = 0; j < classifier->feature[i].size; j++)
-    {
-      fprintf(w, "%d %d %d\n", classifier->feature[i].px[j], classifier->feature[i].py[j], classifier->feature[i].pz[j]);
-      fprintf(w, "%d %d %d\n", classifier->feature[i].nx[j], classifier->feature[i].ny[j], classifier->feature[i].nz[j]);
-    }
-    union { float fl; int i; } flia, flib;
-    flia.fl = classifier->alpha[i * 2];
-    flib.fl = classifier->alpha[i * 2 + 1];
-    fprintf(w, "%d %d\n", flia.i, flib.i);
-  }
-  fclose(w);
-  return 0;
-}
-
-static int _ccv_read_background_data(const char* file, unsigned char** negdata, int* negnum, ccv_size_t size)
-{
-  int stat = 0;
-  FILE* r = fopen(file, "rb");
-  if (r == 0) return -1;
-  stat |= fread(negnum, sizeof(int), 1, r);
-  int i;
-  int isizs012 = _ccv_width_padding(size.width) * size.height +
-           _ccv_width_padding(size.width >> 1) * (size.height >> 1) +
-           _ccv_width_padding(size.width >> 2) * (size.height >> 2);
-  for (i = 0; i < *negnum; i++)
-  {
-    negdata[i] = (unsigned char*)ccmalloc(isizs012);
-    stat |= fread(negdata[i], 1, isizs012, r);
-  }
-  fclose(r);
-  return 0;
-}
-
-static int _ccv_write_background_data(const char* file, unsigned char** negdata, int negnum, ccv_size_t size)
-{
-  FILE* w = fopen(file, "w");
-  if (w == 0) return -1;
-  fwrite(&negnum, sizeof(int), 1, w);
-  int i;
-  int isizs012 = _ccv_width_padding(size.width) * size.height +
-           _ccv_width_padding(size.width >> 1) * (size.height >> 1) +
-           _ccv_width_padding(size.width >> 2) * (size.height >> 2);
-  for (i = 0; i < negnum; i++)
-    fwrite(negdata[i], 1, isizs012, w);
-  fclose(w);
-  return 0;
-}
-
-static int _ccv_resume_bbf_cascade_training_state(const char* file, int* i, int* k, int* bg, double* pw, double* nw, int posnum, int negnum)
-{
-  int stat = 0;
-  FILE* r = fopen(file, "r");
-  if (r == 0) return -1;
-  stat |= fscanf(r, "%d %d %d", i, k, bg);
-  int j;
-  union { double db; int i[2]; } dbi;
-  for (j = 0; j < posnum; j++)
-  {
-    stat |= fscanf(r, "%d %d", &dbi.i[0], &dbi.i[1]);
-    pw[j] = dbi.db;
-  }
-  for (j = 0; j < negnum; j++)
-  {
-    stat |= fscanf(r, "%d %d", &dbi.i[0], &dbi.i[1]);
-    nw[j] = dbi.db;
-  }
-  fclose(r);
-  return 0;
-}
-
-static int _ccv_save_bbf_cacade_training_state(const char* file, int i, int k, int bg, double* pw, double* nw, int posnum, int negnum)
-{
-  FILE* w = fopen(file, "w");
-  if (w == 0) return -1;
-  fprintf(w, "%d %d %d\n", i, k, bg);
-  int j;
-  union { double db; int i[2]; } dbi;
-  for (j = 0; j < posnum; ++j)
-  {
-    dbi.db = pw[j];
-    fprintf(w, "%d %d ", dbi.i[0], dbi.i[1]);
-  }
-  fprintf(w, "\n");
-  for (j = 0; j < negnum; ++j)
-  {
-    dbi.db = nw[j];
-    fprintf(w, "%d %d ", dbi.i[0], dbi.i[1]);
-  }
-  fprintf(w, "\n");
-  fclose(w);
-  return 0;
-}
-
-void ccv_bbf_classifier_cascade_new(ccv_dense_matrix_t** posimg, int posnum, char** bgfiles, int bgnum, int negnum, ccv_size_t size, const char* dir, ccv_bbf_new_param_t params)
-{
-  int i, j, k;
-  /* allocate memory for usage */
-  ccv_bbf_classifier_cascade_t* cascade = (ccv_bbf_classifier_cascade_t*)ccmalloc(sizeof(ccv_bbf_classifier_cascade_t));
-  cascade->count = 0;
-  cascade->size = size;
-  cascade->stage_classifier = (ccv_bbf_stage_classifier_t*)ccmalloc(sizeof(ccv_bbf_stage_classifier_t));
-  unsigned char** posdata = (unsigned char**)ccmalloc(posnum * sizeof(unsigned char*));
-  unsigned char** negdata = (unsigned char**)ccmalloc(negnum * sizeof(unsigned char*));
-  double* pw = (double*)ccmalloc(posnum * sizeof(double));
-  double* nw = (double*)ccmalloc(negnum * sizeof(double));
-  float* peval = (float*)ccmalloc(posnum * sizeof(float));
-  float* neval = (float*)ccmalloc(negnum * sizeof(float));
-  double inv_balance_k = 1. / params.balance_k;
-  /* balance factor k, and weighted with 0.01 */
-  params.balance_k *= 0.01;
-  inv_balance_k *= 0.01;
-
-  int steps[] = { _ccv_width_padding(cascade->size.width),
-          _ccv_width_padding(cascade->size.width >> 1),
-          _ccv_width_padding(cascade->size.width >> 2) };
-  int isizs0 = steps[0] * cascade->size.height;
-  int isizs01 = isizs0 + steps[1] * (cascade->size.height >> 1);
-
-  i = 0;
-  k = 0;
-  int bg = 0;
-  int cacheK = 10;
-  /* state resume code */
-  char buf[1024];
-  sprintf(buf, "%s/stat.txt", dir);
-  _ccv_resume_bbf_cascade_training_state(buf, &i, &k, &bg, pw, nw, posnum, negnum);
-  if (i > 0)
-  {
-    cascade->count = i;
-    ccfree(cascade->stage_classifier);
-    cascade->stage_classifier = (ccv_bbf_stage_classifier_t*)ccmalloc(i * sizeof(ccv_bbf_stage_classifier_t));
-    for (j = 0; j < i; j++)
-    {
-      sprintf(buf, "%s/stage-%d.txt", dir, j);
-      _ccv_read_bbf_stage_classifier(buf, &cascade->stage_classifier[j]);
-    }
-  }
-  if (k > 0)
-    cacheK = k;
-  int rpos, rneg = 0;
-  if (bg)
-  {
-    sprintf(buf, "%s/negs.txt", dir);
-    _ccv_read_background_data(buf, negdata, &rneg, cascade->size);
-  }
-
-  for (; i < params.layer; i++)
-  {
-    if (!bg)
-    {
-      rneg = _ccv_prepare_background_data(cascade, bgfiles, bgnum, negdata, negnum);
-      /* save state of background data */
-      sprintf(buf, "%s/negs.txt", dir);
-      _ccv_write_background_data(buf, negdata, rneg, cascade->size);
-      bg = 1;
-    }
-    double totalw;
-    /* save state of cascade : level, weight etc. */
-    sprintf(buf, "%s/stat.txt", dir);
-    _ccv_save_bbf_cacade_training_state(buf, i, k, bg, pw, nw, posnum, negnum);
-    ccv_bbf_stage_classifier_t classifier;
-    if (k > 0)
-    {
-      /* resume state of classifier */
-      sprintf( buf, "%s/stage-%d.txt", dir, i );
-      _ccv_read_bbf_stage_classifier(buf, &classifier);
-    } else {
-      /* initialize classifier */
-      for (j = 0; j < posnum; j++)
-        pw[j] = params.balance_k;
-      for (j = 0; j < rneg; j++)
-        nw[j] = inv_balance_k;
-      classifier.count = k;
-      classifier.threshold = 0;
-      classifier.feature = (ccv_bbf_feature_t*)ccmalloc(cacheK * sizeof(ccv_bbf_feature_t));
-      classifier.alpha = (float*)ccmalloc(cacheK * 2 * sizeof(float));
-    }
-    _ccv_prepare_positive_data(posimg, posdata, cascade->size, posnum);
-    rpos = _ccv_prune_positive_data(cascade, posdata, posnum, cascade->size);
-    PRINT(CCV_CLI_INFO, "%d postivie data and %d negative data in training\n", rpos, rneg);
-    /* reweight to 1.00 */
-    totalw = 0;
-    for (j = 0; j < rpos; j++)
-      totalw += pw[j];
-    for (j = 0; j < rneg; j++)
-      totalw += nw[j];
-    for (j = 0; j < rpos; j++)
-      pw[j] = pw[j] / totalw;
-    for (j = 0; j < rneg; j++)
-      nw[j] = nw[j] / totalw;
-    for (; ; k++)
-    {
-      /* get overall true-positive, false-positive rate and threshold */
-      double tp = 0, fp = 0, etp = 0, efp = 0;
-      _ccv_bbf_eval_data(&classifier, posdata, rpos, negdata, rneg, cascade->size, peval, neval);
-      _ccv_sort_32f(peval, rpos, 0);
-      classifier.threshold = peval[(int)((1. - params.pos_crit) * rpos)] - 1e-6;
-      for (j = 0; j < rpos; j++)
-      {
-        if (peval[j] >= 0)
-          ++tp;
-        if (peval[j] >= classifier.threshold)
-          ++etp;
-      }
-      tp /= rpos; etp /= rpos;
-      for (j = 0; j < rneg; j++)
-      {
-        if (neval[j] >= 0)
-          ++fp;
-        if (neval[j] >= classifier.threshold)
-          ++efp;
-      }
-      fp /= rneg; efp /= rneg;
-      PRINT(CCV_CLI_INFO, "stage classifier real TP rate : %f, FP rate : %f\n", tp, fp);
-      PRINT(CCV_CLI_INFO, "stage classifier TP rate : %f, FP rate : %f at threshold : %f\n", etp, efp, classifier.threshold);
-      if (k > 0)
-      {
-        /* save classifier state */
-        sprintf(buf, "%s/stage-%d.txt", dir, i);
-        _ccv_write_bbf_stage_classifier(buf, &classifier);
-        sprintf(buf, "%s/stat.txt", dir);
-        _ccv_save_bbf_cacade_training_state(buf, i, k, bg, pw, nw, posnum, negnum);
-      }
-      if (etp > params.pos_crit && efp < params.neg_crit)
-        break;
-      /* TODO: more post-process is needed in here */
-
-      /* select the best feature in current distribution through genetic algorithm optimization */
-      ccv_bbf_feature_t best;
-      if (params.optimizer == CCV_BBF_GENETIC_OPT)
-      {
-        best = _ccv_bbf_genetic_optimize(posdata, rpos, negdata, rneg, params.feature_number, cascade->size, pw, nw);
-      } else if (params.optimizer == CCV_BBF_FLOAT_OPT) {
-        best = _ccv_bbf_convex_optimize(posdata, rpos, negdata, rneg, 0, cascade->size, pw, nw);
-      } else {
-        best = _ccv_bbf_genetic_optimize(posdata, rpos, negdata, rneg, params.feature_number, cascade->size, pw, nw);
-        best = _ccv_bbf_convex_optimize(posdata, rpos, negdata, rneg, &best, cascade->size, pw, nw);
-      }
-      double err = _ccv_bbf_error_rate(&best, posdata, rpos, negdata, rneg, cascade->size, pw, nw);
-      double rw = (1 - err) / err;
-      totalw = 0;
-      /* reweight */
-      for (j = 0; j < rpos; j++)
-      {
-        unsigned char* u8[] = { posdata[j], posdata[j] + isizs0, posdata[j] + isizs01 };
-        if (!_ccv_run_bbf_feature(&best, steps, u8))
-          pw[j] *= rw;
-        pw[j] *= params.balance_k;
-        totalw += pw[j];
-      }
-      for (j = 0; j < rneg; j++)
-      {
-        unsigned char* u8[] = { negdata[j], negdata[j] + isizs0, negdata[j] + isizs01 };
-        if (_ccv_run_bbf_feature(&best, steps, u8))
-          nw[j] *= rw;
-        nw[j] *= inv_balance_k;
-        totalw += nw[j];
-      }
-      for (j = 0; j < rpos; j++)
-        pw[j] = pw[j] / totalw;
-      for (j = 0; j < rneg; j++)
-        nw[j] = nw[j] / totalw;
-      double c = log(rw);
-      PRINT(CCV_CLI_INFO, "coefficient of feature %d: %f\n", k + 1, c);
-      classifier.count = k + 1;
-      /* resizing classifier */
-      if (k >= cacheK)
-      {
-        ccv_bbf_feature_t* feature = (ccv_bbf_feature_t*)ccmalloc(cacheK * 2 * sizeof(ccv_bbf_feature_t));
-        memcpy(feature, classifier.feature, cacheK * sizeof(ccv_bbf_feature_t));
-        ccfree(classifier.feature);
-        float* alpha = (float*)ccmalloc(cacheK * 4 * sizeof(float));
-        memcpy(alpha, classifier.alpha, cacheK * 2 * sizeof(float));
-        ccfree(classifier.alpha);
-        classifier.feature = feature;
-        classifier.alpha = alpha;
-        cacheK *= 2;
-      }
-      /* setup new feature */
-      classifier.feature[k] = best;
-      classifier.alpha[k * 2] = -c;
-      classifier.alpha[k * 2 + 1] = c;
-    }
-    cascade->count = i + 1;
-    ccv_bbf_stage_classifier_t* stage_classifier = (ccv_bbf_stage_classifier_t*)ccmalloc(cascade->count * sizeof(ccv_bbf_stage_classifier_t));
-    memcpy(stage_classifier, cascade->stage_classifier, i * sizeof(ccv_bbf_stage_classifier_t));
-    ccfree(cascade->stage_classifier);
-    stage_classifier[i] = classifier;
-    cascade->stage_classifier = stage_classifier;
-    k = 0;
-    bg = 0;
-    for (j = 0; j < rpos; j++)
-      ccfree(posdata[j]);
-    for (j = 0; j < rneg; j++)
-      ccfree(negdata[j]);
-  }
-
-  ccfree(neval);
-  ccfree(peval);
-  ccfree(nw);
-  ccfree(pw);
-  ccfree(negdata);
-  ccfree(posdata);
-  ccfree(cascade);
-}
-#else
-void ccv_bbf_classifier_cascade_new(ccv_dense_matrix_t** posimg, int posnum, char** bgfiles, int bgnum, int negnum, ccv_size_t size, const char* dir, ccv_bbf_new_param_t params)
-{
-  fprintf(stderr, " ccv_bbf_classifier_cascade_new requires libgsl support, please compile ccv with libgsl.\n");
-}
-#endif
-
-static int _ccv_is_equal(const void* _r1, const void* _r2, void* data)
-{
-  const ccv_comp_t* r1 = (const ccv_comp_t*)_r1;
-  const ccv_comp_t* r2 = (const ccv_comp_t*)_r2;
-  int distance = (int)(r1->rect.width * 0.25 + 0.5);
-
-  return r2->rect.x <= r1->rect.x + distance &&
-       r2->rect.x >= r1->rect.x - distance &&
-       r2->rect.y <= r1->rect.y + distance &&
-       r2->rect.y >= r1->rect.y - distance &&
-       r2->rect.width <= (int)(r1->rect.width * 1.5 + 0.5) &&
-       (int)(r2->rect.width * 1.5 + 0.5) >= r1->rect.width;
-}
-
-static int _ccv_is_equal_same_class(const void* _r1, const void* _r2, void* data)
-{
-  const ccv_comp_t* r1 = (const ccv_comp_t*)_r1;
-  const ccv_comp_t* r2 = (const ccv_comp_t*)_r2;
-  int distance = (int)(r1->rect.width * 0.25 + 0.5);
-
-  return r2->classification.id == r1->classification.id &&
-       r2->rect.x <= r1->rect.x + distance &&
-       r2->rect.x >= r1->rect.x - distance &&
-       r2->rect.y <= r1->rect.y + distance &&
-       r2->rect.y >= r1->rect.y - distance &&
-       r2->rect.width <= (int)(r1->rect.width * 1.5 + 0.5) &&
-       (int)(r2->rect.width * 1.5 + 0.5) >= r1->rect.width;
-}
-
-ccv_array_t* ccv_bbf_detect_objects(ccv_dense_matrix_t* a, ccv_bbf_classifier_cascade_t** _cascade, int count, ccv_bbf_param_t params)
-{
-  int hr = a->rows / params.size.height;
-  int wr = a->cols / params.size.width;
-  double scale = pow(2., 1. / (params.interval + 1.));
-  int next = params.interval + 1;
-  int scale_upto = (int)(log((double)ccv_min(hr, wr)) / log(scale));
-  ccv_dense_matrix_t** pyr = (ccv_dense_matrix_t**)alloca((scale_upto + next * 2) * 4 * sizeof(ccv_dense_matrix_t*));
-  memset(pyr, 0, (scale_upto + next * 2) * 4 * sizeof(ccv_dense_matrix_t*));
-  if (params.size.height != _cascade[0]->size.height || params.size.width != _cascade[0]->size.width)
-    ccv_resample(a, &pyr[0], 0, a->rows * _cascade[0]->size.height / params.size.height, a->cols * _cascade[0]->size.width / params.size.width, CCV_INTER_AREA);
-  else
-    pyr[0] = a;
-  int i, j, k, t, x, y, q;
-  for (i = 1; i < ccv_min(params.interval + 1, scale_upto + next * 2); i++)
-    ccv_resample(pyr[0], &pyr[i * 4], 0, (int)(pyr[0]->rows / pow(scale, i)), (int)(pyr[0]->cols / pow(scale, i)), CCV_INTER_AREA);
-  for (i = next; i < scale_upto + next * 2; i++)
-    ccv_sample_down(pyr[i * 4 - next * 4], &pyr[i * 4], 0, 0, 0);
-  if (params.accurate)
-    for (i = next * 2; i < scale_upto + next * 2; i++)
-    {
-      ccv_sample_down(pyr[i * 4 - next * 4], &pyr[i * 4 + 1], 0, 1, 0);
-      ccv_sample_down(pyr[i * 4 - next * 4], &pyr[i * 4 + 2], 0, 0, 1);
-      ccv_sample_down(pyr[i * 4 - next * 4], &pyr[i * 4 + 3], 0, 1, 1);
-    }
-  ccv_array_t* idx_seq;
-  ccv_array_t* seq = ccv_array_new(sizeof(ccv_comp_t), 64, 0);
-  ccv_array_t* seq2 = ccv_array_new(sizeof(ccv_comp_t), 64, 0);
-  ccv_array_t* result_seq = ccv_array_new(sizeof(ccv_comp_t), 64, 0);
-  /* detect in multi scale */
-  for (t = 0; t < count; t++)
-  {
-    ccv_bbf_classifier_cascade_t* cascade = _cascade[t];
-    float scale_x = (float) params.size.width / (float) cascade->size.width;
-    float scale_y = (float) params.size.height / (float) cascade->size.height;
-    ccv_array_clear(seq);
-    for (i = 0; i < scale_upto; i++)
-    {
-      int dx[] = {0, 1, 0, 1};
-      int dy[] = {0, 0, 1, 1};
-      int i_rows = pyr[i * 4 + next * 8]->rows - (cascade->size.height >> 2);
-      int steps[] = { pyr[i * 4]->step, pyr[i * 4 + next * 4]->step, pyr[i * 4 + next * 8]->step };
-      int i_cols = pyr[i * 4 + next * 8]->cols - (cascade->size.width >> 2);
-      int paddings[] = { pyr[i * 4]->step * 4 - i_cols * 4,
-                 pyr[i * 4 + next * 4]->step * 2 - i_cols * 2,
-                 pyr[i * 4 + next * 8]->step - i_cols };
-      for (q = 0; q < (params.accurate ? 4 : 1); q++)
-      {
-        unsigned char* u8[] = { pyr[i * 4]->data.u8 + dx[q] * 2 + dy[q] * pyr[i * 4]->step * 2, pyr[i * 4 + next * 4]->data.u8 + dx[q] + dy[q] * pyr[i * 4 + next * 4]->step, pyr[i * 4 + next * 8 + q]->data.u8 };
-        for (y = 0; y < i_rows; y++)
-        {
-          for (x = 0; x < i_cols; x++)
-          {
-            float sum;
-            int flag = 1;
-            ccv_bbf_stage_classifier_t* classifier = cascade->stage_classifier;
-            for (j = 0; j < cascade->count; ++j, ++classifier)
-            {
-              sum = 0;
-              float* alpha = classifier->alpha;
-              ccv_bbf_feature_t* feature = classifier->feature;
-              for (k = 0; k < classifier->count; ++k, alpha += 2, ++feature)
-                sum += alpha[_ccv_run_bbf_feature(feature, steps, u8)];
-              if (sum < classifier->threshold)
-              {
-                flag = 0;
-                break;
-              }
-            }
-            if (flag)
-            {
-              ccv_comp_t comp;
-              comp.rect = ccv_rect((int)((x * 4 + dx[q] * 2) * scale_x + 0.5), (int)((y * 4 + dy[q] * 2) * scale_y + 0.5), (int)(cascade->size.width * scale_x + 0.5), (int)(cascade->size.height * scale_y + 0.5));
-              comp.neighbors = 1;
-              comp.classification.id = t;
-              comp.classification.confidence = sum;
-              ccv_array_push(seq, &comp);
-            }
-            u8[0] += 4;
-            u8[1] += 2;
-            u8[2] += 1;
-          }
-          u8[0] += paddings[0];
-          u8[1] += paddings[1];
-          u8[2] += paddings[2];
-        }
-      }
-      scale_x *= scale;
-      scale_y *= scale;
-    }
-
-    /* the following code from OpenCV's haar feature implementation */
-    if(params.min_neighbors == 0)
-    {
-      for (i = 0; i < seq->rnum; i++)
-      {
-        ccv_comp_t* comp = (ccv_comp_t*)ccv_array_get(seq, i);
-        ccv_array_push(result_seq, comp);
-      }
-    } else {
-      idx_seq = 0;
-      ccv_array_clear(seq2);
-      // group retrieved rectangles in order to filter out noise
-      int ncomp = ccv_array_group(seq, &idx_seq, _ccv_is_equal_same_class, 0);
-      ccv_comp_t* comps = (ccv_comp_t*)ccmalloc((ncomp + 1) * sizeof(ccv_comp_t));
-      memset(comps, 0, (ncomp + 1) * sizeof(ccv_comp_t));
-
-      // count number of neighbors
-      for(i = 0; i < seq->rnum; i++)
-      {
-        ccv_comp_t r1 = *(ccv_comp_t*)ccv_array_get(seq, i);
-        int idx = *(int*)ccv_array_get(idx_seq, i);
-
-        if (comps[idx].neighbors == 0)
-          comps[idx].classification.confidence = r1.classification.confidence;
-
-        ++comps[idx].neighbors;
-
-        comps[idx].rect.x += r1.rect.x;
-        comps[idx].rect.y += r1.rect.y;
-        comps[idx].rect.width += r1.rect.width;
-        comps[idx].rect.height += r1.rect.height;
-        comps[idx].classification.id = r1.classification.id;
-        comps[idx].classification.confidence = ccv_max(comps[idx].classification.confidence, r1.classification.confidence);
-      }
-
-      // calculate average bounding box
-      for(i = 0; i < ncomp; i++)
-      {
-        int n = comps[i].neighbors;
-        if(n >= params.min_neighbors)
-        {
-          ccv_comp_t comp;
-          comp.rect.x = (comps[i].rect.x * 2 + n) / (2 * n);
-          comp.rect.y = (comps[i].rect.y * 2 + n) / (2 * n);
-          comp.rect.width = (comps[i].rect.width * 2 + n) / (2 * n);
-          comp.rect.height = (comps[i].rect.height * 2 + n) / (2 * n);
-          comp.neighbors = comps[i].neighbors;
-          comp.classification.id = comps[i].classification.id;
-          comp.classification.confidence = comps[i].classification.confidence;
-          ccv_array_push(seq2, &comp);
-        }
-      }
-
-      // filter out small face rectangles inside large face rectangles
-      for(i = 0; i < seq2->rnum; i++)
-      {
-        ccv_comp_t r1 = *(ccv_comp_t*)ccv_array_get(seq2, i);
-        int flag = 1;
-
-        for(j = 0; j < seq2->rnum; j++)
-        {
-          ccv_comp_t r2 = *(ccv_comp_t*)ccv_array_get(seq2, j);
-          int distance = (int)(r2.rect.width * 0.25 + 0.5);
-
-          if(i != j &&
-             r1.classification.id == r2.classification.id &&
-             r1.rect.x >= r2.rect.x - distance &&
-             r1.rect.y >= r2.rect.y - distance &&
-             r1.rect.x + r1.rect.width <= r2.rect.x + r2.rect.width + distance &&
-             r1.rect.y + r1.rect.height <= r2.rect.y + r2.rect.height + distance &&
-             (r2.neighbors > ccv_max(3, r1.neighbors) || r1.neighbors < 3))
-          {
-            flag = 0;
-            break;
-          }
-        }
-
-        if(flag)
-          ccv_array_push(result_seq, &r1);
-      }
-      ccv_array_free(idx_seq);
-      ccfree(comps);
-    }
-  }
-
-  ccv_array_free(seq);
-  ccv_array_free(seq2);
-
-  ccv_array_t* result_seq2;
-  /* the following code from OpenCV's haar feature implementation */
-  if (params.flags & CCV_BBF_NO_NESTED)
-  {
-    result_seq2 = ccv_array_new(sizeof(ccv_comp_t), 64, 0);
-    idx_seq = 0;
-    // group retrieved rectangles in order to filter out noise
-    int ncomp = ccv_array_group(result_seq, &idx_seq, _ccv_is_equal, 0);
-    ccv_comp_t* comps = (ccv_comp_t*)ccmalloc((ncomp + 1) * sizeof(ccv_comp_t));
-    memset(comps, 0, (ncomp + 1) * sizeof(ccv_comp_t));
-
-    // count number of neighbors
-    for(i = 0; i < result_seq->rnum; i++)
-    {
-      ccv_comp_t r1 = *(ccv_comp_t*)ccv_array_get(result_seq, i);
-      int idx = *(int*)ccv_array_get(idx_seq, i);
-
-      if (comps[idx].neighbors == 0 || comps[idx].classification.confidence < r1.classification.confidence)
-      {
-        comps[idx].classification.confidence = r1.classification.confidence;
-        comps[idx].neighbors = 1;
-        comps[idx].rect = r1.rect;
-        comps[idx].classification.id = r1.classification.id;
-      }
-    }
-
-    // calculate average bounding box
-    for(i = 0; i < ncomp; i++)
-      if(comps[i].neighbors)
-        ccv_array_push(result_seq2, &comps[i]);
-
-    ccv_array_free(result_seq);
-    ccfree(comps);
-  } else {
-    result_seq2 = result_seq;
-  }
-
-  for (i = 1; i < scale_upto + next * 2; i++)
-    ccv_matrix_free(pyr[i * 4]);
-  if (params.accurate)
-    for (i = next * 2; i < scale_upto + next * 2; i++)
-    {
-      ccv_matrix_free(pyr[i * 4 + 1]);
-      ccv_matrix_free(pyr[i * 4 + 2]);
-      ccv_matrix_free(pyr[i * 4 + 3]);
-    }
-  if (params.size.height != _cascade[0]->size.height || params.size.width != _cascade[0]->size.width)
-    ccv_matrix_free(pyr[0]);
-
-  return result_seq2;
-}
-
-ccv_bbf_classifier_cascade_t* ccv_bbf_read_classifier_cascade(const char* directory)
-{
-  char buf[1024];
-  sprintf(buf, "%s/cascade.txt", directory);
-  int s, i;
-  FILE* r = fopen(buf, "r");
-  if (r == 0)
-    return 0;
-  ccv_bbf_classifier_cascade_t* cascade = (ccv_bbf_classifier_cascade_t*)ccmalloc(sizeof(ccv_bbf_classifier_cascade_t));
-  s = fscanf(r, "%d %d %d", &cascade->count, &cascade->size.width, &cascade->size.height);
-  assert(s > 0);
-  cascade->stage_classifier = (ccv_bbf_stage_classifier_t*)ccmalloc(cascade->count * sizeof(ccv_bbf_stage_classifier_t));
-  for (i = 0; i < cascade->count; i++)
-  {
-    sprintf(buf, "%s/stage-%d.txt", directory, i);
-    if (_ccv_read_bbf_stage_classifier(buf, &cascade->stage_classifier[i]) < 0)
-    {
-      cascade->count = i;
-      break;
-    }
-  }
-  fclose(r);
-  return cascade;
-}
-
-ccv_bbf_classifier_cascade_t* ccv_bbf_classifier_cascade_read_binary(char* s)
-{
-  int i;
-  ccv_bbf_classifier_cascade_t* cascade = (ccv_bbf_classifier_cascade_t*)ccmalloc(sizeof(ccv_bbf_classifier_cascade_t));
-  memcpy(&cascade->count, s, sizeof(cascade->count)); s += sizeof(cascade->count);
-  memcpy(&cascade->size.width, s, sizeof(cascade->size.width)); s += sizeof(cascade->size.width);
-  memcpy(&cascade->size.height, s, sizeof(cascade->size.height)); s += sizeof(cascade->size.height);
-  ccv_bbf_stage_classifier_t* classifier = cascade->stage_classifier = (ccv_bbf_stage_classifier_t*)ccmalloc(cascade->count * sizeof(ccv_bbf_stage_classifier_t));
-  for (i = 0; i < cascade->count; i++, classifier++)
-  {
-    memcpy(&classifier->count, s, sizeof(classifier->count)); s += sizeof(classifier->count);
-    memcpy(&classifier->threshold, s, sizeof(classifier->threshold)); s += sizeof(classifier->threshold);
-    classifier->feature = (ccv_bbf_feature_t*)ccmalloc(classifier->count * sizeof(ccv_bbf_feature_t));
-    classifier->alpha = (float*)ccmalloc(classifier->count * 2 * sizeof(float));
-    memcpy(classifier->feature, s, classifier->count * sizeof(ccv_bbf_feature_t)); s += classifier->count * sizeof(ccv_bbf_feature_t);
-    memcpy(classifier->alpha, s, classifier->count * 2 * sizeof(float)); s += classifier->count * 2 * sizeof(float);
-  }
-  return cascade;
-
-}
-
-int ccv_bbf_classifier_cascade_write_binary(ccv_bbf_classifier_cascade_t* cascade, char* s, int slen)
-{
-  int i;
-  int len = sizeof(cascade->count) + sizeof(cascade->size.width) + sizeof(cascade->size.height);
-  ccv_bbf_stage_classifier_t* classifier = cascade->stage_classifier;
-  for (i = 0; i < cascade->count; i++, classifier++)
-    len += sizeof(classifier->count) + sizeof(classifier->threshold) + classifier->count * sizeof(ccv_bbf_feature_t) + classifier->count * 2 * sizeof(float);
-  if (slen >= len)
-  {
-    memcpy(s, &cascade->count, sizeof(cascade->count)); s += sizeof(cascade->count);
-    memcpy(s, &cascade->size.width, sizeof(cascade->size.width)); s += sizeof(cascade->size.width);
-    memcpy(s, &cascade->size.height, sizeof(cascade->size.height)); s += sizeof(cascade->size.height);
-    classifier = cascade->stage_classifier;
-    for (i = 0; i < cascade->count; i++, classifier++)
-    {
-      memcpy(s, &classifier->count, sizeof(classifier->count)); s += sizeof(classifier->count);
-      memcpy(s, &classifier->threshold, sizeof(classifier->threshold)); s += sizeof(classifier->threshold);
-      memcpy(s, classifier->feature, classifier->count * sizeof(ccv_bbf_feature_t)); s += classifier->count * sizeof(ccv_bbf_feature_t);
-      memcpy(s, classifier->alpha, classifier->count * 2 * sizeof(float)); s += classifier->count * 2 * sizeof(float);
-    }
-  }
-  return len;
-}
-
-void ccv_bbf_classifier_cascade_free(ccv_bbf_classifier_cascade_t* cascade)
-{
-  int i;
-  for (i = 0; i < cascade->count; ++i)
-  {
-    ccfree(cascade->stage_classifier[i].feature);
-    ccfree(cascade->stage_classifier[i].alpha);
-  }
-  ccfree(cascade->stage_classifier);
-  ccfree(cascade);
-}
\ No newline at end of file
diff --git a/test/source.cc b/test/source.cc
deleted file mode 100644
index f0094b3..0000000
--- a/test/source.cc
+++ /dev/null
@@ -1,1573 +0,0 @@
-#include "ccv.h"
-#include "ccv_internal.h"
-#include <sys/time.h>
-#ifdef HAVE_GSL
-#include <gsl/gsl_rng.h>
-#include <gsl/gsl_randist.h>
-#endif
-#ifdef USE_OPENMP
-#include <omp.h>
-#endif
-
-const ccv_bbf_param_t ccv_bbf_default_params = {
-    .interval = 5,
-    .min_neighbors = 2,
-    .accurate = 1,
-    .flags = 0,
-    .size = {
-        24,
-        24,
-    },
-};
-
-#define _ccv_width_padding(x) (((x) + 3) & -4)
-
-static inline int _ccv_run_bbf_feature(ccv_bbf_feature_t *feature, int *step, unsigned char **u8)
-{
-#define pf_at(i) (*(u8[feature->pz[i]] + feature->px[i] + feature->py[i] * step[feature->pz[i]]))
-#define nf_at(i) (*(u8[feature->nz[i]] + feature->nx[i] + feature->ny[i] * step[feature->nz[i]]))
-  unsigned char pmin = pf_at(0), nmax = nf_at(0);
-  /* check if every point in P > every point in N, and take a shortcut */
-  if (pmin <= nmax)
-    return 0;
-  int i;
-  for (i = 1; i < feature->size; i++)
-  {
-    if (feature->pz[i] >= 0)
-    {
-      int p = pf_at(i);
-      if (p < pmin)
-      {
-        if (p <= nmax)
-          return 0;
-        pmin = p;
-      }
-    }
-    if (feature->nz[i] >= 0)
-    {
-      int n = nf_at(i);
-      if (n > nmax)
-      {
-        if (pmin <= n)
-          return 0;
-        nmax = n;
-      }
-    }
-  }
-#undef pf_at
-#undef nf_at
-  return 1;
-}
-
-static int _ccv_read_bbf_stage_classifier(const char *file, ccv_bbf_stage_classifier_t *classifier)
-{
-  FILE *r = fopen(file, "r");
-  if (r == 0)
-    return -1;
-  int stat = 0;
-  stat |= fscanf(r, "%d", &classifier->count);
-  union {
-    float fl;
-    int i;
-  } fli;
-  stat |= fscanf(r, "%d", &fli.i);
-  classifier->threshold = fli.fl;
-  classifier->feature = (ccv_bbf_feature_t *)ccmalloc(classifier->count * sizeof(ccv_bbf_feature_t));
-  classifier->alpha = (float *)ccmalloc(classifier->count * 2 * sizeof(float));
-  int i, j;
-  for (i = 0; i < classifier->count; i++)
-  {
-    stat |= fscanf(r, "%d", &classifier->feature[i].size);
-    for (j = 0; j < classifier->feature[i].size; j++)
-    {
-      stat |= fscanf(r, "%d %d %d", &classifier->feature[i].px[j], &classifier->feature[i].py[j], &classifier->feature[i].pz[j]);
-      stat |= fscanf(r, "%d %d %d", &classifier->feature[i].nx[j], &classifier->feature[i].ny[j], &classifier->feature[i].nz[j]);
-    }
-    union {
-      float fl;
-      int i;
-    } flia, flib;
-    stat |= fscanf(r, "%d %d", &flia.i, &flib.i);
-    classifier->alpha[i * 2] = flia.fl;
-    classifier->alpha[i * 2 + 1] = flib.fl;
-  }
-  fclose(r);
-  return 0;
-}
-
-#ifdef HAVE_GSL
-
-static unsigned int _ccv_bbf_time_measure()
-{
-  struct timeval tv;
-  gettimeofday(&tv, 0);
-  return tv.tv_sec * 1000000 + tv.tv_usec;
-}
-
-#define less_than(a, b, aux) ((a) < (b))
-CCV_IMPLEMENT_QSORT(_ccv_sort_32f, float, less_than)
-#undef less_than
-
-static void _ccv_bbf_eval_data(ccv_bbf_stage_classifier_t *classifier, unsigned char **posdata, int posnum, unsigned char **negdata, int negnum, ccv_size_t size, float *peval, float *neval)
-{
-  int i, j;
-  int steps[] = {_ccv_width_padding(size.width),
-                 _ccv_width_padding(size.width >> 1),
-                 _ccv_width_padding(size.width >> 2)};
-  int isizs0 = steps[0] * size.height;
-  int isizs01 = isizs0 + steps[1] * (size.height >> 1);
-  for (i = 0; i < posnum; i++)
-  {
-    unsigned char *u8[] = {posdata[i], posdata[i] + isizs0, posdata[i] + isizs01};
-    float sum = 0;
-    float *alpha = classifier->alpha;
-    ccv_bbf_feature_t *feature = classifier->feature;
-    for (j = 0; j < classifier->count; ++j, alpha += 2, ++feature)
-      sum += alpha[_ccv_run_bbf_feature(feature, steps, u8)];
-    peval[i] = sum;
-  }
-  for (i = 0; i < negnum; i++)
-  {
-    unsigned char *u8[] = {negdata[i], negdata[i] + isizs0, negdata[i] + isizs01};
-    float sum = 0;
-    float *alpha = classifier->alpha;
-    ccv_bbf_feature_t *feature = classifier->feature;
-    for (j = 0; j < classifier->count; ++j, alpha += 2, ++feature)
-      sum += alpha[_ccv_run_bbf_feature(feature, steps, u8)];
-    neval[i] = sum;
-  }
-}
-
-static int _ccv_prune_positive_data(ccv_bbf_classifier_cascade_t *cascade, unsigned char **posdata, int posnum, ccv_size_t size)
-{
-  float *peval = (float *)ccmalloc(posnum * sizeof(float));
-  int i, j, k, rpos = posnum;
-  for (i = 0; i < cascade->count; i++)
-  {
-    _ccv_bbf_eval_data(cascade->stage_classifier + i, posdata, rpos, 0, 0, size, peval, 0);
-    k = 0;
-    for (j = 0; j < rpos; j++)
-      if (peval[j] >= cascade->stage_classifier[i].threshold)
-      {
-        posdata[k] = posdata[j];
-        ++k;
-      }
-      else
-      {
-        ccfree(posdata[j]);
-      }
-    rpos = k;
-  }
-  ccfree(peval);
-  return rpos;
-}
-
-static int _ccv_prepare_background_data(ccv_bbf_classifier_cascade_t *cascade, char **bgfiles, int bgnum, unsigned char **negdata, int negnum)
-{
-  int t, i, j, k, q;
-  int negperbg;
-  int negtotal = 0;
-  int steps[] = {_ccv_width_padding(cascade->size.width),
-                 _ccv_width_padding(cascade->size.width >> 1),
-                 _ccv_width_padding(cascade->size.width >> 2)};
-  int isizs0 = steps[0] * cascade->size.height;
-  int isizs1 = steps[1] * (cascade->size.height >> 1);
-  int isizs2 = steps[2] * (cascade->size.height >> 2);
-  int *idcheck = (int *)ccmalloc(negnum * sizeof(int));
-
-  gsl_rng_env_setup();
-
-  gsl_rng *rng = gsl_rng_alloc(gsl_rng_default);
-  gsl_rng_set(rng, (unsigned long int)idcheck);
-
-  ccv_size_t imgsz = cascade->size;
-  int rneg = negtotal;
-  for (t = 0; negtotal < negnum; t++)
-  {
-    PRINT(CCV_CLI_INFO, "preparing negative data ...  0%%");
-    for (i = 0; i < bgnum; i++)
-    {
-      negperbg = (t < 2) ? (negnum - negtotal) / (bgnum - i) + 1 : negnum - negtotal;
-      ccv_dense_matrix_t *image = 0;
-      ccv_read(bgfiles[i], &image, CCV_IO_GRAY | CCV_IO_ANY_FILE);
-      assert((image->type & CCV_C1) && (image->type & CCV_8U));
-      if (image == 0)
-      {
-        PRINT(CCV_CLI_ERROR, "\n%s file corrupted\n", bgfiles[i]);
-        continue;
-      }
-      if (t % 2 != 0)
-        ccv_flip(image, 0, 0, CCV_FLIP_X);
-      if (t % 4 >= 2)
-        ccv_flip(image, 0, 0, CCV_FLIP_Y);
-      ccv_bbf_param_t params = {.interval = 3, .min_neighbors = 0, .accurate = 1, .flags = 0, .size = cascade->size};
-      ccv_array_t *detected = ccv_bbf_detect_objects(image, &cascade, 1, params);
-      memset(idcheck, 0, ccv_min(detected->rnum, negperbg) * sizeof(int));
-      for (j = 0; j < ccv_min(detected->rnum, negperbg); j++)
-      {
-        int r = gsl_rng_uniform_int(rng, detected->rnum);
-        int flag = 1;
-        ccv_rect_t *rect = (ccv_rect_t *)ccv_array_get(detected, r);
-        while (flag)
-        {
-          flag = 0;
-          for (k = 0; k < j; k++)
-            if (r == idcheck[k])
-            {
-              flag = 1;
-              r = gsl_rng_uniform_int(rng, detected->rnum);
-              break;
-            }
-          rect = (ccv_rect_t *)ccv_array_get(detected, r);
-          if ((rect->x < 0) || (rect->y < 0) || (rect->width + rect->x > image->cols) || (rect->height + rect->y > image->rows))
-          {
-            flag = 1;
-            r = gsl_rng_uniform_int(rng, detected->rnum);
-          }
-        }
-        idcheck[j] = r;
-        ccv_dense_matrix_t *temp = 0;
-        ccv_dense_matrix_t *imgs0 = 0;
-        ccv_dense_matrix_t *imgs1 = 0;
-        ccv_dense_matrix_t *imgs2 = 0;
-        ccv_slice(image, (ccv_matrix_t **)&temp, 0, rect->y, rect->x, rect->height, rect->width);
-        ccv_resample(temp, &imgs0, 0, imgsz.height, imgsz.width, CCV_INTER_AREA);
-        assert(imgs0->step == steps[0]);
-        ccv_matrix_free(temp);
-        ccv_sample_down(imgs0, &imgs1, 0, 0, 0);
-        assert(imgs1->step == steps[1]);
-        ccv_sample_down(imgs1, &imgs2, 0, 0, 0);
-        assert(imgs2->step == steps[2]);
-
-        negdata[negtotal] = (unsigned char *)ccmalloc(isizs0 + isizs1 + isizs2);
-        unsigned char *u8s0 = negdata[negtotal];
-        unsigned char *u8s1 = negdata[negtotal] + isizs0;
-        unsigned char *u8s2 = negdata[negtotal] + isizs0 + isizs1;
-        unsigned char *u8[] = {u8s0, u8s1, u8s2};
-        memcpy(u8s0, imgs0->data.u8, imgs0->rows * imgs0->step);
-        ccv_matrix_free(imgs0);
-        memcpy(u8s1, imgs1->data.u8, imgs1->rows * imgs1->step);
-        ccv_matrix_free(imgs1);
-        memcpy(u8s2, imgs2->data.u8, imgs2->rows * imgs2->step);
-        ccv_matrix_free(imgs2);
-
-        flag = 1;
-        ccv_bbf_stage_classifier_t *classifier = cascade->stage_classifier;
-        for (k = 0; k < cascade->count; ++k, ++classifier)
-        {
-          float sum = 0;
-          float *alpha = classifier->alpha;
-          ccv_bbf_feature_t *feature = classifier->feature;
-          for (q = 0; q < classifier->count; ++q, alpha += 2, ++feature)
-            sum += alpha[_ccv_run_bbf_feature(feature, steps, u8)];
-          if (sum < classifier->threshold)
-          {
-            flag = 0;
-            break;
-          }
-        }
-        if (!flag)
-          ccfree(negdata[negtotal]);
-        else
-        {
-          ++negtotal;
-          if (negtotal >= negnum)
-            break;
-        }
-      }
-      ccv_array_free(detected);
-      ccv_matrix_free(image);
-      ccv_drain_cache();
-      PRINT(CCV_CLI_INFO, "\rpreparing negative data ... %2d%%", 100 * negtotal / negnum);
-      fflush(0);
-      if (negtotal >= negnum)
-        break;
-    }
-    if (rneg == negtotal)
-      break;
-    rneg = negtotal;
-    PRINT(CCV_CLI_INFO, "\nentering additional round %d\n", t + 1);
-  }
-  gsl_rng_free(rng);
-  ccfree(idcheck);
-  ccv_drain_cache();
-  PRINT(CCV_CLI_INFO, "\n");
-  return negtotal;
-}
-
-static void _ccv_prepare_positive_data(ccv_dense_matrix_t **posimg, unsigned char **posdata, ccv_size_t size, int posnum)
-{
-  PRINT(CCV_CLI_INFO, "preparing positive data ...  0%%");
-  int i;
-  for (i = 0; i < posnum; i++)
-  {
-    ccv_dense_matrix_t *imgs0 = posimg[i];
-    ccv_dense_matrix_t *imgs1 = 0;
-    ccv_dense_matrix_t *imgs2 = 0;
-    assert((imgs0->type & CCV_C1) && (imgs0->type & CCV_8U) && imgs0->rows == size.height && imgs0->cols == size.width);
-    ccv_sample_down(imgs0, &imgs1, 0, 0, 0);
-    ccv_sample_down(imgs1, &imgs2, 0, 0, 0);
-    int isizs0 = imgs0->rows * imgs0->step;
-    int isizs1 = imgs1->rows * imgs1->step;
-    int isizs2 = imgs2->rows * imgs2->step;
-
-    posdata[i] = (unsigned char *)ccmalloc(isizs0 + isizs1 + isizs2);
-    memcpy(posdata[i], imgs0->data.u8, isizs0);
-    memcpy(posdata[i] + isizs0, imgs1->data.u8, isizs1);
-    memcpy(posdata[i] + isizs0 + isizs1, imgs2->data.u8, isizs2);
-
-    PRINT(CCV_CLI_INFO, "\rpreparing positive data ... %2d%%", 100 * (i + 1) / posnum);
-    fflush(0);
-
-    ccv_matrix_free(imgs1);
-    ccv_matrix_free(imgs2);
-  }
-  ccv_drain_cache();
-  PRINT(CCV_CLI_INFO, "\n");
-}
-
-typedef struct
-{
-  double fitness;
-  int pk, nk;
-  int age;
-  double error;
-  ccv_bbf_feature_t feature;
-} ccv_bbf_gene_t;
-
-static inline void _ccv_bbf_genetic_fitness(ccv_bbf_gene_t *gene)
-{
-  gene->fitness = (1 - gene->error) * exp(-0.01 * gene->age) * exp((gene->pk + gene->nk) * log(1.015));
-}
-
-static inline int _ccv_bbf_exist_gene_feature(ccv_bbf_gene_t *gene, int x, int y, int z)
-{
-  int i;
-  for (i = 0; i < gene->pk; i++)
-    if (z == gene->feature.pz[i] && x == gene->feature.px[i] && y == gene->feature.py[i])
-      return 1;
-  for (i = 0; i < gene->nk; i++)
-    if (z == gene->feature.nz[i] && x == gene->feature.nx[i] && y == gene->feature.ny[i])
-      return 1;
-  return 0;
-}
-
-static inline void _ccv_bbf_randomize_gene(gsl_rng *rng, ccv_bbf_gene_t *gene, int *rows, int *cols)
-{
-  int i;
-  do
-  {
-    gene->pk = gsl_rng_uniform_int(rng, CCV_BBF_POINT_MAX - 1) + 1;
-    gene->nk = gsl_rng_uniform_int(rng, CCV_BBF_POINT_MAX - 1) + 1;
-  } while (gene->pk + gene->nk < CCV_BBF_POINT_MIN); /* a hard restriction of at least 3 points have to be examed */
-  gene->feature.size = ccv_max(gene->pk, gene->nk);
-  gene->age = 0;
-  for (i = 0; i < CCV_BBF_POINT_MAX; i++)
-  {
-    gene->feature.pz[i] = -1;
-    gene->feature.nz[i] = -1;
-  }
-  int x, y, z;
-  for (i = 0; i < gene->pk; i++)
-  {
-    do
-    {
-      z = gsl_rng_uniform_int(rng, 3);
-      x = gsl_rng_uniform_int(rng, cols[z]);
-      y = gsl_rng_uniform_int(rng, rows[z]);
-    } while (_ccv_bbf_exist_gene_feature(gene, x, y, z));
-    gene->feature.pz[i] = z;
-    gene->feature.px[i] = x;
-    gene->feature.py[i] = y;
-  }
-  for (i = 0; i < gene->nk; i++)
-  {
-    do
-    {
-      z = gsl_rng_uniform_int(rng, 3);
-      x = gsl_rng_uniform_int(rng, cols[z]);
-      y = gsl_rng_uniform_int(rng, rows[z]);
-    } while (_ccv_bbf_exist_gene_feature(gene, x, y, z));
-    gene->feature.nz[i] = z;
-    gene->feature.nx[i] = x;
-    gene->feature.ny[i] = y;
-  }
-}
-
-static inline double _ccv_bbf_error_rate(ccv_bbf_feature_t *feature, unsigned char **posdata, int posnum, unsigned char **negdata, int negnum, ccv_size_t size, double *pw, double *nw)
-{
-  int i;
-  int steps[] = {_ccv_width_padding(size.width),
-                 _ccv_width_padding(size.width >> 1),
-                 _ccv_width_padding(size.width >> 2)};
-  int isizs0 = steps[0] * size.height;
-  int isizs01 = isizs0 + steps[1] * (size.height >> 1);
-  double error = 0;
-  for (i = 0; i < posnum; i++)
-  {
-    unsigned char *u8[] = {posdata[i], posdata[i] + isizs0, posdata[i] + isizs01};
-    if (!_ccv_run_bbf_feature(feature, steps, u8))
-      error += pw[i];
-  }
-  for (i = 0; i < negnum; i++)
-  {
-    unsigned char *u8[] = {negdata[i], negdata[i] + isizs0, negdata[i] + isizs01};
-    if (_ccv_run_bbf_feature(feature, steps, u8))
-      error += nw[i];
-  }
-  return error;
-}
-
-#define less_than(fit1, fit2, aux) ((fit1).fitness >= (fit2).fitness)
-static CCV_IMPLEMENT_QSORT(_ccv_bbf_genetic_qsort, ccv_bbf_gene_t, less_than)
-#undef less_than
-
-    static ccv_bbf_feature_t _ccv_bbf_genetic_optimize(unsigned char **posdata, int posnum, unsigned char **negdata, int negnum, int ftnum, ccv_size_t size, double *pw, double *nw)
-{
-  ccv_bbf_feature_t best;
-  /* seed (random method) */
-  gsl_rng_env_setup();
-  gsl_rng *rng = gsl_rng_alloc(gsl_rng_default);
-  union {
-    unsigned long int li;
-    double db;
-  } dbli;
-  dbli.db = pw[0] + nw[0];
-  gsl_rng_set(rng, dbli.li);
-  int i, j;
-  int pnum = ftnum * 100;
-  assert(pnum > 0);
-  ccv_bbf_gene_t *gene = (ccv_bbf_gene_t *)ccmalloc(pnum * sizeof(ccv_bbf_gene_t));
-  int rows[] = {size.height, size.height >> 1, size.height >> 2};
-  int cols[] = {size.width, size.width >> 1, size.width >> 2};
-  for (i = 0; i < pnum; i++)
-    _ccv_bbf_randomize_gene(rng, &gene[i], rows, cols);
-  unsigned int timer = _ccv_bbf_time_measure();
-#ifdef USE_OPENMP
-#pragma omp parallel for private(i) schedule(dynamic)
-#endif
-  for (i = 0; i < pnum; i++)
-    gene[i].error = _ccv_bbf_error_rate(&gene[i].feature, posdata, posnum, negdata, negnum, size, pw, nw);
-  timer = _ccv_bbf_time_measure() - timer;
-  for (i = 0; i < pnum; i++)
-    _ccv_bbf_genetic_fitness(&gene[i]);
-  double best_err = 1;
-  int rnum = ftnum * 39; /* number of randomize */
-  int mnum = ftnum * 40; /* number of mutation */
-  int hnum = ftnum * 20; /* number of hybrid */
-  /* iteration stop crit : best no change in 40 iterations */
-  int it = 0, t;
-  for (t = 0; it < 40; ++it, ++t)
-  {
-    int min_id = 0;
-    double min_err = gene[0].error;
-    for (i = 1; i < pnum; i++)
-      if (gene[i].error < min_err)
-      {
-        min_id = i;
-        min_err = gene[i].error;
-      }
-    min_err = gene[min_id].error = _ccv_bbf_error_rate(&gene[min_id].feature, posdata, posnum, negdata, negnum, size, pw, nw);
-    if (min_err < best_err)
-    {
-      best_err = min_err;
-      memcpy(&best, &gene[min_id].feature, sizeof(best));
-      PRINT(CCV_CLI_INFO, "best bbf feature with error %f\n|-size: %d\n|-positive point: ", best_err, best.size);
-      for (i = 0; i < best.size; i++)
-        PRINT(CCV_CLI_INFO, "(%d %d %d), ", best.px[i], best.py[i], best.pz[i]);
-      PRINT(CCV_CLI_INFO, "\n|-negative point: ");
-      for (i = 0; i < best.size; i++)
-        PRINT(CCV_CLI_INFO, "(%d %d %d), ", best.nx[i], best.ny[i], best.nz[i]);
-      PRINT(CCV_CLI_INFO, "\n");
-      it = 0;
-    }
-    PRINT(CCV_CLI_INFO, "minimum error achieved in round %d(%d) : %f with %d ms\n", t, it, min_err, timer / 1000);
-    _ccv_bbf_genetic_qsort(gene, pnum, 0);
-    for (i = 0; i < ftnum; i++)
-      ++gene[i].age;
-    for (i = ftnum; i < ftnum + mnum; i++)
-    {
-      int parent = gsl_rng_uniform_int(rng, ftnum);
-      memcpy(gene + i, gene + parent, sizeof(ccv_bbf_gene_t));
-      /* three mutation strategy : 1. add, 2. remove, 3. refine */
-      int pnm, pn = gsl_rng_uniform_int(rng, 2);
-      int *pnk[] = {&gene[i].pk, &gene[i].nk};
-      int *pnx[] = {gene[i].feature.px, gene[i].feature.nx};
-      int *pny[] = {gene[i].feature.py, gene[i].feature.ny};
-      int *pnz[] = {gene[i].feature.pz, gene[i].feature.nz};
-      int x, y, z;
-      int victim, decay = 1;
-      do
-      {
-        switch (gsl_rng_uniform_int(rng, 3))
-        {
-        case 0: /* add */
-          if (gene[i].pk == CCV_BBF_POINT_MAX && gene[i].nk == CCV_BBF_POINT_MAX)
-            break;
-          while (*pnk[pn] + 1 > CCV_BBF_POINT_MAX)
-            pn = gsl_rng_uniform_int(rng, 2);
-          do
-          {
-            z = gsl_rng_uniform_int(rng, 3);
-            x = gsl_rng_uniform_int(rng, cols[z]);
-            y = gsl_rng_uniform_int(rng, rows[z]);
-          } while (_ccv_bbf_exist_gene_feature(&gene[i], x, y, z));
-          pnz[pn][*pnk[pn]] = z;
-          pnx[pn][*pnk[pn]] = x;
-          pny[pn][*pnk[pn]] = y;
-          ++(*pnk[pn]);
-          gene[i].feature.size = ccv_max(gene[i].pk, gene[i].nk);
-          decay = gene[i].age = 0;
-          break;
-        case 1:                                             /* remove */
-          if (gene[i].pk + gene[i].nk <= CCV_BBF_POINT_MIN) /* at least 3 points have to be examed */
-            break;
-          while (*pnk[pn] - 1 <= 0) // || *pnk[pn] + *pnk[!pn] - 1 < CCV_BBF_POINT_MIN)
-            pn = gsl_rng_uniform_int(rng, 2);
-          victim = gsl_rng_uniform_int(rng, *pnk[pn]);
-          for (j = victim; j < *pnk[pn] - 1; j++)
-          {
-            pnz[pn][j] = pnz[pn][j + 1];
-            pnx[pn][j] = pnx[pn][j + 1];
-            pny[pn][j] = pny[pn][j + 1];
-          }
-          pnz[pn][*pnk[pn] - 1] = -1;
-          --(*pnk[pn]);
-          gene[i].feature.size = ccv_max(gene[i].pk, gene[i].nk);
-          decay = gene[i].age = 0;
-          break;
-        case 2: /* refine */
-          pnm = gsl_rng_uniform_int(rng, *pnk[pn]);
-          do
-          {
-            z = gsl_rng_uniform_int(rng, 3);
-            x = gsl_rng_uniform_int(rng, cols[z]);
-            y = gsl_rng_uniform_int(rng, rows[z]);
-          } while (_ccv_bbf_exist_gene_feature(&gene[i], x, y, z));
-          pnz[pn][pnm] = z;
-          pnx[pn][pnm] = x;
-          pny[pn][pnm] = y;
-          decay = gene[i].age = 0;
-          break;
-        }
-      } while (decay);
-    }
-    for (i = ftnum + mnum; i < ftnum + mnum + hnum; i++)
-    {
-      /* hybrid strategy: taking positive points from dad, negative points from mum */
-      int dad, mum;
-      do
-      {
-        dad = gsl_rng_uniform_int(rng, ftnum);
-        mum = gsl_rng_uniform_int(rng, ftnum);
-      } while (dad == mum || gene[dad].pk + gene[mum].nk < CCV_BBF_POINT_MIN); /* at least 3 points have to be examed */
-      for (j = 0; j < CCV_BBF_POINT_MAX; j++)
-      {
-        gene[i].feature.pz[j] = -1;
-        gene[i].feature.nz[j] = -1;
-      }
-      gene[i].pk = gene[dad].pk;
-      for (j = 0; j < gene[i].pk; j++)
-      {
-        gene[i].feature.pz[j] = gene[dad].feature.pz[j];
-        gene[i].feature.px[j] = gene[dad].feature.px[j];
-        gene[i].feature.py[j] = gene[dad].feature.py[j];
-      }
-      gene[i].nk = gene[mum].nk;
-      for (j = 0; j < gene[i].nk; j++)
-      {
-        gene[i].feature.nz[j] = gene[mum].feature.nz[j];
-        gene[i].feature.nx[j] = gene[mum].feature.nx[j];
-        gene[i].feature.ny[j] = gene[mum].feature.ny[j];
-      }
-      gene[i].feature.size = ccv_max(gene[i].pk, gene[i].nk);
-      gene[i].age = 0;
-    }
-    for (i = ftnum + mnum + hnum; i < ftnum + mnum + hnum + rnum; i++)
-      _ccv_bbf_randomize_gene(rng, &gene[i], rows, cols);
-    timer = _ccv_bbf_time_measure();
-#ifdef USE_OPENMP
-#pragma omp parallel for private(i) schedule(dynamic)
-#endif
-    for (i = 0; i < pnum; i++)
-      gene[i].error = _ccv_bbf_error_rate(&gene[i].feature, posdata, posnum, negdata, negnum, size, pw, nw);
-    timer = _ccv_bbf_time_measure() - timer;
-    for (i = 0; i < pnum; i++)
-      _ccv_bbf_genetic_fitness(&gene[i]);
-  }
-  ccfree(gene);
-  gsl_rng_free(rng);
-  return best;
-}
-
-#define less_than(fit1, fit2, aux) ((fit1).error < (fit2).error)
-static CCV_IMPLEMENT_QSORT(_ccv_bbf_best_qsort, ccv_bbf_gene_t, less_than)
-#undef less_than
-
-    static ccv_bbf_gene_t _ccv_bbf_best_gene(ccv_bbf_gene_t *gene, int pnum, int point_min, unsigned char **posdata, int posnum, unsigned char **negdata, int negnum, ccv_size_t size, double *pw, double *nw)
-{
-  int i;
-  unsigned int timer = _ccv_bbf_time_measure();
-#ifdef USE_OPENMP
-#pragma omp parallel for private(i) schedule(dynamic)
-#endif
-  for (i = 0; i < pnum; i++)
-    gene[i].error = _ccv_bbf_error_rate(&gene[i].feature, posdata, posnum, negdata, negnum, size, pw, nw);
-  timer = _ccv_bbf_time_measure() - timer;
-  _ccv_bbf_best_qsort(gene, pnum, 0);
-  int min_id = 0;
-  double min_err = gene[0].error;
-  for (i = 0; i < pnum; i++)
-    if (gene[i].nk + gene[i].pk >= point_min)
-    {
-      min_id = i;
-      min_err = gene[i].error;
-      break;
-    }
-  PRINT(CCV_CLI_INFO, "local best bbf feature with error %f\n|-size: %d\n|-positive point: ", min_err, gene[min_id].feature.size);
-  for (i = 0; i < gene[min_id].feature.size; i++)
-    PRINT(CCV_CLI_INFO, "(%d %d %d), ", gene[min_id].feature.px[i], gene[min_id].feature.py[i], gene[min_id].feature.pz[i]);
-  PRINT(CCV_CLI_INFO, "\n|-negative point: ");
-  for (i = 0; i < gene[min_id].feature.size; i++)
-    PRINT(CCV_CLI_INFO, "(%d %d %d), ", gene[min_id].feature.nx[i], gene[min_id].feature.ny[i], gene[min_id].feature.nz[i]);
-  PRINT(CCV_CLI_INFO, "\nthe computation takes %d ms\n", timer / 1000);
-  return gene[min_id];
-}
-
-static ccv_bbf_feature_t _ccv_bbf_convex_optimize(unsigned char **posdata, int posnum, unsigned char **negdata, int negnum, ccv_bbf_feature_t *best_feature, ccv_size_t size, double *pw, double *nw)
-{
-  ccv_bbf_gene_t best_gene;
-  /* seed (random method) */
-  gsl_rng_env_setup();
-  gsl_rng *rng = gsl_rng_alloc(gsl_rng_default);
-  union {
-    unsigned long int li;
-    double db;
-  } dbli;
-  dbli.db = pw[0] + nw[0];
-  gsl_rng_set(rng, dbli.li);
-  int i, j, k, q, p, g, t;
-  int rows[] = {size.height, size.height >> 1, size.height >> 2};
-  int cols[] = {size.width, size.width >> 1, size.width >> 2};
-  int pnum = rows[0] * cols[0] + rows[1] * cols[1] + rows[2] * cols[2];
-  ccv_bbf_gene_t *gene = (ccv_bbf_gene_t *)ccmalloc((pnum * (CCV_BBF_POINT_MAX * 2 + 1) * 2 + CCV_BBF_POINT_MAX * 2 + 1) * sizeof(ccv_bbf_gene_t));
-  if (best_feature == 0)
-  {
-    /* bootstrapping the best feature, start from two pixels, one for positive, one for negative
-		 * the bootstrapping process go like this: first, it will assign a random pixel as positive
-		 * and enumerate every possible pixel as negative, and pick the best one. Then, enumerate every
-		 * possible pixel as positive, and pick the best one, until it converges */
-    memset(&best_gene, 0, sizeof(ccv_bbf_gene_t));
-    for (i = 0; i < CCV_BBF_POINT_MAX; i++)
-      best_gene.feature.pz[i] = best_gene.feature.nz[i] = -1;
-    best_gene.pk = 1;
-    best_gene.nk = 0;
-    best_gene.feature.size = 1;
-    best_gene.feature.pz[0] = gsl_rng_uniform_int(rng, 3);
-    best_gene.feature.px[0] = gsl_rng_uniform_int(rng, cols[best_gene.feature.pz[0]]);
-    best_gene.feature.py[0] = gsl_rng_uniform_int(rng, rows[best_gene.feature.pz[0]]);
-    for (t = 0;; ++t)
-    {
-      g = 0;
-      if (t % 2 == 0)
-      {
-        for (i = 0; i < 3; i++)
-          for (j = 0; j < cols[i]; j++)
-            for (k = 0; k < rows[i]; k++)
-              if (i != best_gene.feature.pz[0] || j != best_gene.feature.px[0] || k != best_gene.feature.py[0])
-              {
-                gene[g] = best_gene;
-                gene[g].pk = gene[g].nk = 1;
-                gene[g].feature.nz[0] = i;
-                gene[g].feature.nx[0] = j;
-                gene[g].feature.ny[0] = k;
-                g++;
-              }
-      }
-      else
-      {
-        for (i = 0; i < 3; i++)
-          for (j = 0; j < cols[i]; j++)
-            for (k = 0; k < rows[i]; k++)
-              if (i != best_gene.feature.nz[0] || j != best_gene.feature.nx[0] || k != best_gene.feature.ny[0])
-              {
-                gene[g] = best_gene;
-                gene[g].pk = gene[g].nk = 1;
-                gene[g].feature.pz[0] = i;
-                gene[g].feature.px[0] = j;
-                gene[g].feature.py[0] = k;
-                g++;
-              }
-      }
-      PRINT(CCV_CLI_INFO, "bootstrapping round : %d\n", t);
-      ccv_bbf_gene_t local_gene = _ccv_bbf_best_gene(gene, g, 2, posdata, posnum, negdata, negnum, size, pw, nw);
-      if (local_gene.error >= best_gene.error - 1e-10)
-        break;
-      best_gene = local_gene;
-    }
-  }
-  else
-  {
-    best_gene.feature = *best_feature;
-    best_gene.pk = best_gene.nk = best_gene.feature.size;
-    for (i = 0; i < CCV_BBF_POINT_MAX; i++)
-      if (best_feature->pz[i] == -1)
-      {
-        best_gene.pk = i;
-        break;
-      }
-    for (i = 0; i < CCV_BBF_POINT_MAX; i++)
-      if (best_feature->nz[i] == -1)
-      {
-        best_gene.nk = i;
-        break;
-      }
-  }
-  /* after bootstrapping, the float search technique will do the following permutations:
-	 * a). add a new point to positive or negative
-	 * b). remove a point from positive or negative
-	 * c). move an existing point in positive or negative to another position
-	 * the three rules applied exhaustively, no heuristic used. */
-  for (t = 0;; ++t)
-  {
-    g = 0;
-    for (i = 0; i < 3; i++)
-      for (j = 0; j < cols[i]; j++)
-        for (k = 0; k < rows[i]; k++)
-          if (!_ccv_bbf_exist_gene_feature(&best_gene, j, k, i))
-          {
-            /* add positive point */
-            if (best_gene.pk < CCV_BBF_POINT_MAX - 1)
-            {
-              gene[g] = best_gene;
-              gene[g].feature.pz[gene[g].pk] = i;
-              gene[g].feature.px[gene[g].pk] = j;
-              gene[g].feature.py[gene[g].pk] = k;
-              gene[g].pk++;
-              gene[g].feature.size = ccv_max(gene[g].pk, gene[g].nk);
-              g++;
-            }
-            /* add negative point */
-            if (best_gene.nk < CCV_BBF_POINT_MAX - 1)
-            {
-              gene[g] = best_gene;
-              gene[g].feature.nz[gene[g].nk] = i;
-              gene[g].feature.nx[gene[g].nk] = j;
-              gene[g].feature.ny[gene[g].nk] = k;
-              gene[g].nk++;
-              gene[g].feature.size = ccv_max(gene[g].pk, gene[g].nk);
-              g++;
-            }
-            /* refine positive point */
-            for (q = 0; q < best_gene.pk; q++)
-            {
-              gene[g] = best_gene;
-              gene[g].feature.pz[q] = i;
-              gene[g].feature.px[q] = j;
-              gene[g].feature.py[q] = k;
-              g++;
-            }
-            /* add positive point, remove negative point */
-            if (best_gene.pk < CCV_BBF_POINT_MAX - 1 && best_gene.nk > 1)
-            {
-              for (q = 0; q < best_gene.nk; q++)
-              {
-                gene[g] = best_gene;
-                gene[g].feature.pz[gene[g].pk] = i;
-                gene[g].feature.px[gene[g].pk] = j;
-                gene[g].feature.py[gene[g].pk] = k;
-                gene[g].pk++;
-                for (p = q; p < best_gene.nk - 1; p++)
-                {
-                  gene[g].feature.nz[p] = gene[g].feature.nz[p + 1];
-                  gene[g].feature.nx[p] = gene[g].feature.nx[p + 1];
-                  gene[g].feature.ny[p] = gene[g].feature.ny[p + 1];
-                }
-                gene[g].feature.nz[gene[g].nk - 1] = -1;
-                gene[g].nk--;
-                gene[g].feature.size = ccv_max(gene[g].pk, gene[g].nk);
-                g++;
-              }
-            }
-            /* refine negative point */
-            for (q = 0; q < best_gene.nk; q++)
-            {
-              gene[g] = best_gene;
-              gene[g].feature.nz[q] = i;
-              gene[g].feature.nx[q] = j;
-              gene[g].feature.ny[q] = k;
-              g++;
-            }
-            /* add negative point, remove positive point */
-            if (best_gene.pk > 1 && best_gene.nk < CCV_BBF_POINT_MAX - 1)
-            {
-              for (q = 0; q < best_gene.pk; q++)
-              {
-                gene[g] = best_gene;
-                gene[g].feature.nz[gene[g].nk] = i;
-                gene[g].feature.nx[gene[g].nk] = j;
-                gene[g].feature.ny[gene[g].nk] = k;
-                gene[g].nk++;
-                for (p = q; p < best_gene.pk - 1; p++)
-                {
-                  gene[g].feature.pz[p] = gene[g].feature.pz[p + 1];
-                  gene[g].feature.px[p] = gene[g].feature.px[p + 1];
-                  gene[g].feature.py[p] = gene[g].feature.py[p + 1];
-                }
-                gene[g].feature.pz[gene[g].pk - 1] = -1;
-                gene[g].pk--;
-                gene[g].feature.size = ccv_max(gene[g].pk, gene[g].nk);
-                g++;
-              }
-            }
-          }
-    if (best_gene.pk > 1)
-      for (q = 0; q < best_gene.pk; q++)
-      {
-        gene[g] = best_gene;
-        for (i = q; i < best_gene.pk - 1; i++)
-        {
-          gene[g].feature.pz[i] = gene[g].feature.pz[i + 1];
-          gene[g].feature.px[i] = gene[g].feature.px[i + 1];
-          gene[g].feature.py[i] = gene[g].feature.py[i + 1];
-        }
-        gene[g].feature.pz[gene[g].pk - 1] = -1;
-        gene[g].pk--;
-        gene[g].feature.size = ccv_max(gene[g].pk, gene[g].nk);
-        g++;
-      }
-    if (best_gene.nk > 1)
-      for (q = 0; q < best_gene.nk; q++)
-      {
-        gene[g] = best_gene;
-        for (i = q; i < best_gene.nk - 1; i++)
-        {
-          gene[g].feature.nz[i] = gene[g].feature.nz[i + 1];
-          gene[g].feature.nx[i] = gene[g].feature.nx[i + 1];
-          gene[g].feature.ny[i] = gene[g].feature.ny[i + 1];
-        }
-        gene[g].feature.nz[gene[g].nk - 1] = -1;
-        gene[g].nk--;
-        gene[g].feature.size = ccv_max(gene[g].pk, gene[g].nk);
-        g++;
-      }
-    gene[g] = best_gene;
-    g++;
-    PRINT(CCV_CLI_INFO, "float search round : %d\n", t);
-    ccv_bbf_gene_t local_gene = _ccv_bbf_best_gene(gene, g, CCV_BBF_POINT_MIN, posdata, posnum, negdata, negnum, size, pw, nw);
-    if (local_gene.error >= best_gene.error - 1e-10)
-      break;
-    best_gene = local_gene;
-  }
-  ccfree(gene);
-  gsl_rng_free(rng);
-  return best_gene.feature;
-}
-
-static int _ccv_write_bbf_stage_classifier(const char *file, ccv_bbf_stage_classifier_t *classifier)
-{
-  FILE *w = fopen(file, "wb");
-  if (w == 0)
-    return -1;
-  fprintf(w, "%d\n", classifier->count);
-  union {
-    float fl;
-    int i;
-  } fli;
-  fli.fl = classifier->threshold;
-  fprintf(w, "%d\n", fli.i);
-  int i, j;
-  for (i = 0; i < classifier->count; i++)
-  {
-    fprintf(w, "%d\n", classifier->feature[i].size);
-    for (j = 0; j < classifier->feature[i].size; j++)
-    {
-      fprintf(w, "%d %d %d\n", classifier->feature[i].px[j], classifier->feature[i].py[j], classifier->feature[i].pz[j]);
-      fprintf(w, "%d %d %d\n", classifier->feature[i].nx[j], classifier->feature[i].ny[j], classifier->feature[i].nz[j]);
-    }
-    union {
-      float fl;
-      int i;
-    } flia, flib;
-    flia.fl = classifier->alpha[i * 2];
-    flib.fl = classifier->alpha[i * 2 + 1];
-    fprintf(w, "%d %d\n", flia.i, flib.i);
-  }
-  fclose(w);
-  return 0;
-}
-
-static int _ccv_read_background_data(const char *file, unsigned char **negdata, int *negnum, ccv_size_t size)
-{
-  int stat = 0;
-  FILE *r = fopen(file, "rb");
-  if (r == 0)
-    return -1;
-  stat |= fread(negnum, sizeof(int), 1, r);
-  int i;
-  int isizs012 = _ccv_width_padding(size.width) * size.height +
-                 _ccv_width_padding(size.width >> 1) * (size.height >> 1) +
-                 _ccv_width_padding(size.width >> 2) * (size.height >> 2);
-  for (i = 0; i < *negnum; i++)
-  {
-    negdata[i] = (unsigned char *)ccmalloc(isizs012);
-    stat |= fread(negdata[i], 1, isizs012, r);
-  }
-  fclose(r);
-  return 0;
-}
-
-static int _ccv_write_background_data(const char *file, unsigned char **negdata, int negnum, ccv_size_t size)
-{
-  FILE *w = fopen(file, "w");
-  if (w == 0)
-    return -1;
-  fwrite(&negnum, sizeof(int), 1, w);
-  int i;
-  int isizs012 = _ccv_width_padding(size.width) * size.height +
-                 _ccv_width_padding(size.width >> 1) * (size.height >> 1) +
-                 _ccv_width_padding(size.width >> 2) * (size.height >> 2);
-  for (i = 0; i < negnum; i++)
-    fwrite(negdata[i], 1, isizs012, w);
-  fclose(w);
-  return 0;
-}
-
-static int _ccv_resume_bbf_cascade_training_state(const char *file, int *i, int *k, int *bg, double *pw, double *nw, int posnum, int negnum)
-{
-  int stat = 0;
-  FILE *r = fopen(file, "r");
-  if (r == 0)
-    return -1;
-  stat |= fscanf(r, "%d %d %d", i, k, bg);
-  int j;
-  union {
-    double db;
-    int i[2];
-  } dbi;
-  for (j = 0; j < posnum; j++)
-  {
-    stat |= fscanf(r, "%d %d", &dbi.i[0], &dbi.i[1]);
-    pw[j] = dbi.db;
-  }
-  for (j = 0; j < negnum; j++)
-  {
-    stat |= fscanf(r, "%d %d", &dbi.i[0], &dbi.i[1]);
-    nw[j] = dbi.db;
-  }
-  fclose(r);
-  return 0;
-}
-
-static int _ccv_save_bbf_cacade_training_state(const char *file, int i, int k, int bg, double *pw, double *nw, int posnum, int negnum)
-{
-  FILE *w = fopen(file, "w");
-  if (w == 0)
-    return -1;
-  fprintf(w, "%d %d %d\n", i, k, bg);
-  int j;
-  union {
-    double db;
-    int i[2];
-  } dbi;
-  for (j = 0; j < posnum; ++j)
-  {
-    dbi.db = pw[j];
-    fprintf(w, "%d %d ", dbi.i[0], dbi.i[1]);
-  }
-  fprintf(w, "\n");
-  for (j = 0; j < negnum; ++j)
-  {
-    dbi.db = nw[j];
-    fprintf(w, "%d %d ", dbi.i[0], dbi.i[1]);
-  }
-  fprintf(w, "\n");
-  fclose(w);
-  return 0;
-}
-
-void ccv_bbf_classifier_cascade_new(ccv_dense_matrix_t **posimg, int posnum, char **bgfiles, int bgnum, int negnum, ccv_size_t size, const char *dir, ccv_bbf_new_param_t params)
-{
-  int i, j, k;
-  /* allocate memory for usage */
-  ccv_bbf_classifier_cascade_t *cascade = (ccv_bbf_classifier_cascade_t *)ccmalloc(sizeof(ccv_bbf_classifier_cascade_t));
-  cascade->count = 0;
-  cascade->size = size;
-  cascade->stage_classifier = (ccv_bbf_stage_classifier_t *)ccmalloc(sizeof(ccv_bbf_stage_classifier_t));
-  unsigned char **posdata = (unsigned char **)ccmalloc(posnum * sizeof(unsigned char *));
-  unsigned char **negdata = (unsigned char **)ccmalloc(negnum * sizeof(unsigned char *));
-  double *pw = (double *)ccmalloc(posnum * sizeof(double));
-  double *nw = (double *)ccmalloc(negnum * sizeof(double));
-  float *peval = (float *)ccmalloc(posnum * sizeof(float));
-  float *neval = (float *)ccmalloc(negnum * sizeof(float));
-  double inv_balance_k = 1. / params.balance_k;
-  /* balance factor k, and weighted with 0.01 */
-  params.balance_k *= 0.01;
-  inv_balance_k *= 0.01;
-
-  int steps[] = {_ccv_width_padding(cascade->size.width),
-                 _ccv_width_padding(cascade->size.width >> 1),
-                 _ccv_width_padding(cascade->size.width >> 2)};
-  int isizs0 = steps[0] * cascade->size.height;
-  int isizs01 = isizs0 + steps[1] * (cascade->size.height >> 1);
-
-  i = 0;
-  k = 0;
-  int bg = 0;
-  int cacheK = 10;
-  /* state resume code */
-  char buf[1024];
-  sprintf(buf, "%s/stat.txt", dir);
-  _ccv_resume_bbf_cascade_training_state(buf, &i, &k, &bg, pw, nw, posnum, negnum);
-  if (i > 0)
-  {
-    cascade->count = i;
-    ccfree(cascade->stage_classifier);
-    cascade->stage_classifier = (ccv_bbf_stage_classifier_t *)ccmalloc(i * sizeof(ccv_bbf_stage_classifier_t));
-    for (j = 0; j < i; j++)
-    {
-      sprintf(buf, "%s/stage-%d.txt", dir, j);
-      _ccv_read_bbf_stage_classifier(buf, &cascade->stage_classifier[j]);
-    }
-  }
-  if (k > 0)
-    cacheK = k;
-  int rpos, rneg = 0;
-  if (bg)
-  {
-    sprintf(buf, "%s/negs.txt", dir);
-    _ccv_read_background_data(buf, negdata, &rneg, cascade->size);
-  }
-
-  for (; i < params.layer; i++)
-  {
-    if (!bg)
-    {
-      rneg = _ccv_prepare_background_data(cascade, bgfiles, bgnum, negdata, negnum);
-      /* save state of background data */
-      sprintf(buf, "%s/negs.txt", dir);
-      _ccv_write_background_data(buf, negdata, rneg, cascade->size);
-      bg = 1;
-    }
-    double totalw;
-    /* save state of cascade : level, weight etc. */
-    sprintf(buf, "%s/stat.txt", dir);
-    _ccv_save_bbf_cacade_training_state(buf, i, k, bg, pw, nw, posnum, negnum);
-    ccv_bbf_stage_classifier_t classifier;
-    if (k > 0)
-    {
-      /* resume state of classifier */
-      sprintf(buf, "%s/stage-%d.txt", dir, i);
-      _ccv_read_bbf_stage_classifier(buf, &classifier);
-    }
-    else
-    {
-      /* initialize classifier */
-      for (j = 0; j < posnum; j++)
-        pw[j] = params.balance_k;
-      for (j = 0; j < rneg; j++)
-        nw[j] = inv_balance_k;
-      classifier.count = k;
-      classifier.threshold = 0;
-      classifier.feature = (ccv_bbf_feature_t *)ccmalloc(cacheK * sizeof(ccv_bbf_feature_t));
-      classifier.alpha = (float *)ccmalloc(cacheK * 2 * sizeof(float));
-    }
-    _ccv_prepare_positive_data(posimg, posdata, cascade->size, posnum);
-    rpos = _ccv_prune_positive_data(cascade, posdata, posnum, cascade->size);
-    PRINT(CCV_CLI_INFO, "%d postivie data and %d negative data in training\n", rpos, rneg);
-    /* reweight to 1.00 */
-    totalw = 0;
-    for (j = 0; j < rpos; j++)
-      totalw += pw[j];
-    for (j = 0; j < rneg; j++)
-      totalw += nw[j];
-    for (j = 0; j < rpos; j++)
-      pw[j] = pw[j] / totalw;
-    for (j = 0; j < rneg; j++)
-      nw[j] = nw[j] / totalw;
-    for (;; k++)
-    {
-      /* get overall true-positive, false-positive rate and threshold */
-      double tp = 0, fp = 0, etp = 0, efp = 0;
-      _ccv_bbf_eval_data(&classifier, posdata, rpos, negdata, rneg, cascade->size, peval, neval);
-      _ccv_sort_32f(peval, rpos, 0);
-      classifier.threshold = peval[(int)((1. - params.pos_crit) * rpos)] - 1e-6;
-      for (j = 0; j < rpos; j++)
-      {
-        if (peval[j] >= 0)
-          ++tp;
-        if (peval[j] >= classifier.threshold)
-          ++etp;
-      }
-      tp /= rpos;
-      etp /= rpos;
-      for (j = 0; j < rneg; j++)
-      {
-        if (neval[j] >= 0)
-          ++fp;
-        if (neval[j] >= classifier.threshold)
-          ++efp;
-      }
-      fp /= rneg;
-      efp /= rneg;
-      PRINT(CCV_CLI_INFO, "stage classifier real TP rate : %f, FP rate : %f\n", tp, fp);
-      PRINT(CCV_CLI_INFO, "stage classifier TP rate : %f, FP rate : %f at threshold : %f\n", etp, efp, classifier.threshold);
-      if (k > 0)
-      {
-        /* save classifier state */
-        sprintf(buf, "%s/stage-%d.txt", dir, i);
-        _ccv_write_bbf_stage_classifier(buf, &classifier);
-        sprintf(buf, "%s/stat.txt", dir);
-        _ccv_save_bbf_cacade_training_state(buf, i, k, bg, pw, nw, posnum, negnum);
-      }
-      if (etp > params.pos_crit && efp < params.neg_crit)
-        break;
-      /* TODO: more post-process is needed in here */
-
-      /* select the best feature in current distribution through genetic algorithm optimization */
-      ccv_bbf_feature_t best;
-      if (params.optimizer == CCV_BBF_GENETIC_OPT)
-      {
-        best = _ccv_bbf_genetic_optimize(posdata, rpos, negdata, rneg, params.feature_number, cascade->size, pw, nw);
-      }
-      else if (params.optimizer == CCV_BBF_FLOAT_OPT)
-      {
-        best = _ccv_bbf_convex_optimize(posdata, rpos, negdata, rneg, 0, cascade->size, pw, nw);
-      }
-      else
-      {
-        best = _ccv_bbf_genetic_optimize(posdata, rpos, negdata, rneg, params.feature_number, cascade->size, pw, nw);
-        best = _ccv_bbf_convex_optimize(posdata, rpos, negdata, rneg, &best, cascade->size, pw, nw);
-      }
-      double err = _ccv_bbf_error_rate(&best, posdata, rpos, negdata, rneg, cascade->size, pw, nw);
-      double rw = (1 - err) / err;
-      totalw = 0;
-      /* reweight */
-      for (j = 0; j < rpos; j++)
-      {
-        unsigned char *u8[] = {posdata[j], posdata[j] + isizs0, posdata[j] + isizs01};
-        if (!_ccv_run_bbf_feature(&best, steps, u8))
-          pw[j] *= rw;
-        pw[j] *= params.balance_k;
-        totalw += pw[j];
-      }
-      for (j = 0; j < rneg; j++)
-      {
-        unsigned char *u8[] = {negdata[j], negdata[j] + isizs0, negdata[j] + isizs01};
-        if (_ccv_run_bbf_feature(&best, steps, u8))
-          nw[j] *= rw;
-        nw[j] *= inv_balance_k;
-        totalw += nw[j];
-      }
-      for (j = 0; j < rpos; j++)
-        pw[j] = pw[j] / totalw;
-      for (j = 0; j < rneg; j++)
-        nw[j] = nw[j] / totalw;
-      double c = log(rw);
-      PRINT(CCV_CLI_INFO, "coefficient of feature %d: %f\n", k + 1, c);
-      classifier.count = k + 1;
-      /* resizing classifier */
-      if (k >= cacheK)
-      {
-        ccv_bbf_feature_t *feature = (ccv_bbf_feature_t *)ccmalloc(cacheK * 2 * sizeof(ccv_bbf_feature_t));
-        memcpy(feature, classifier.feature, cacheK * sizeof(ccv_bbf_feature_t));
-        ccfree(classifier.feature);
-        float *alpha = (float *)ccmalloc(cacheK * 4 * sizeof(float));
-        memcpy(alpha, classifier.alpha, cacheK * 2 * sizeof(float));
-        ccfree(classifier.alpha);
-        classifier.feature = feature;
-        classifier.alpha = alpha;
-        cacheK *= 2;
-      }
-      /* setup new feature */
-      classifier.feature[k] = best;
-      classifier.alpha[k * 2] = -c;
-      classifier.alpha[k * 2 + 1] = c;
-    }
-    cascade->count = i + 1;
-    ccv_bbf_stage_classifier_t *stage_classifier = (ccv_bbf_stage_classifier_t *)ccmalloc(cascade->count * sizeof(ccv_bbf_stage_classifier_t));
-    memcpy(stage_classifier, cascade->stage_classifier, i * sizeof(ccv_bbf_stage_classifier_t));
-    ccfree(cascade->stage_classifier);
-    stage_classifier[i] = classifier;
-    cascade->stage_classifier = stage_classifier;
-    k = 0;
-    bg = 0;
-    for (j = 0; j < rpos; j++)
-      ccfree(posdata[j]);
-    for (j = 0; j < rneg; j++)
-      ccfree(negdata[j]);
-  }
-
-  ccfree(neval);
-  ccfree(peval);
-  ccfree(nw);
-  ccfree(pw);
-  ccfree(negdata);
-  ccfree(posdata);
-  ccfree(cascade);
-}
-#else
-void ccv_bbf_classifier_cascade_new(ccv_dense_matrix_t **posimg, int posnum, char **bgfiles, int bgnum, int negnum, ccv_size_t size, const char *dir, ccv_bbf_new_param_t params)
-{
-  fprintf(stderr, " ccv_bbf_classifier_cascade_new requires libgsl support, please compile ccv with libgsl.\n");
-}
-#endif
-
-static int _ccv_is_equal(const void *_r1, const void *_r2, void *data)
-{
-  const ccv_comp_t *r1 = (const ccv_comp_t *)_r1;
-  const ccv_comp_t *r2 = (const ccv_comp_t *)_r2;
-  int distance = (int)(r1->rect.width * 0.25 + 0.5);
-
-  return r2->rect.x <= r1->rect.x + distance &&
-         r2->rect.x >= r1->rect.x - distance &&
-         r2->rect.y <= r1->rect.y + distance &&
-         r2->rect.y >= r1->rect.y - distance &&
-         r2->rect.width <= (int)(r1->rect.width * 1.5 + 0.5) &&
-         (int)(r2->rect.width * 1.5 + 0.5) >= r1->rect.width;
-}
-
-static int _ccv_is_equal_same_class(const void *_r1, const void *_r2, void *data)
-{
-  const ccv_comp_t *r1 = (const ccv_comp_t *)_r1;
-  const ccv_comp_t *r2 = (const ccv_comp_t *)_r2;
-  int distance = (int)(r1->rect.width * 0.25 + 0.5);
-
-  return r2->classification.id == r1->classification.id &&
-         r2->rect.x <= r1->rect.x + distance &&
-         r2->rect.x >= r1->rect.x - distance &&
-         r2->rect.y <= r1->rect.y + distance &&
-         r2->rect.y >= r1->rect.y - distance &&
-         r2->rect.width <= (int)(r1->rect.width * 1.5 + 0.5) &&
-         (int)(r2->rect.width * 1.5 + 0.5) >= r1->rect.width;
-}
-
-ccv_array_t *ccv_bbf_detect_objects(ccv_dense_matrix_t *a, ccv_bbf_classifier_cascade_t **_cascade, int count, ccv_bbf_param_t params)
-{
-  int hr = a->rows / params.size.height;
-  int wr = a->cols / params.size.width;
-  double scale = pow(2., 1. / (params.interval + 1.));
-  int next = params.interval + 1;
-  int scale_upto = (int)(log((double)ccv_min(hr, wr)) / log(scale));
-  ccv_dense_matrix_t **pyr = (ccv_dense_matrix_t **)alloca((scale_upto + next * 2) * 4 * sizeof(ccv_dense_matrix_t *));
-  memset(pyr, 0, (scale_upto + next * 2) * 4 * sizeof(ccv_dense_matrix_t *));
-  if (params.size.height != _cascade[0]->size.height || params.size.width != _cascade[0]->size.width)
-    ccv_resample(a, &pyr[0], 0, a->rows * _cascade[0]->size.height / params.size.height, a->cols * _cascade[0]->size.width / params.size.width, CCV_INTER_AREA);
-  else
-    pyr[0] = a;
-  int i, j, k, t, x, y, q;
-  for (i = 1; i < ccv_min(params.interval + 1, scale_upto + next * 2); i++)
-    ccv_resample(pyr[0], &pyr[i * 4], 0, (int)(pyr[0]->rows / pow(scale, i)), (int)(pyr[0]->cols / pow(scale, i)), CCV_INTER_AREA);
-  for (i = next; i < scale_upto + next * 2; i++)
-    ccv_sample_down(pyr[i * 4 - next * 4], &pyr[i * 4], 0, 0, 0);
-  if (params.accurate)
-    for (i = next * 2; i < scale_upto + next * 2; i++)
-    {
-      ccv_sample_down(pyr[i * 4 - next * 4], &pyr[i * 4 + 1], 0, 1, 0);
-      ccv_sample_down(pyr[i * 4 - next * 4], &pyr[i * 4 + 2], 0, 0, 1);
-      ccv_sample_down(pyr[i * 4 - next * 4], &pyr[i * 4 + 3], 0, 1, 1);
-    }
-  ccv_array_t *idx_seq;
-  ccv_array_t *seq = ccv_array_new(sizeof(ccv_comp_t), 64, 0);
-  ccv_array_t *seq2 = ccv_array_new(sizeof(ccv_comp_t), 64, 0);
-  ccv_array_t *result_seq = ccv_array_new(sizeof(ccv_comp_t), 64, 0);
-  /* detect in multi scale */
-  for (t = 0; t < count; t++)
-  {
-    ccv_bbf_classifier_cascade_t *cascade = _cascade[t];
-    float scale_x = (float)params.size.width / (float)cascade->size.width;
-    float scale_y = (float)params.size.height / (float)cascade->size.height;
-    ccv_array_clear(seq);
-    for (i = 0; i < scale_upto; i++)
-    {
-      int dx[] = {0, 1, 0, 1};
-      int dy[] = {0, 0, 1, 1};
-      int i_rows = pyr[i * 4 + next * 8]->rows - (cascade->size.height >> 2);
-      int steps[] = {pyr[i * 4]->step, pyr[i * 4 + next * 4]->step, pyr[i * 4 + next * 8]->step};
-      int i_cols = pyr[i * 4 + next * 8]->cols - (cascade->size.width >> 2);
-      int paddings[] = {pyr[i * 4]->step * 4 - i_cols * 4,
-                        pyr[i * 4 + next * 4]->step * 2 - i_cols * 2,
-                        pyr[i * 4 + next * 8]->step - i_cols};
-      for (q = 0; q < (params.accurate ? 4 : 1); q++)
-      {
-        unsigned char *u8[] = {pyr[i * 4]->data.u8 + dx[q] * 2 + dy[q] * pyr[i * 4]->step * 2, pyr[i * 4 + next * 4]->data.u8 + dx[q] + dy[q] * pyr[i * 4 + next * 4]->step, pyr[i * 4 + next * 8 + q]->data.u8};
-        for (y = 0; y < i_rows; y++)
-        {
-          for (x = 0; x < i_cols; x++)
-          {
-            float sum;
-            int flag = 1;
-            ccv_bbf_stage_classifier_t *classifier = cascade->stage_classifier;
-            for (j = 0; j < cascade->count; ++j, ++classifier)
-            {
-              sum = 0;
-              float *alpha = classifier->alpha;
-              ccv_bbf_feature_t *feature = classifier->feature;
-              for (k = 0; k < classifier->count; ++k, alpha += 2, ++feature)
-                sum += alpha[_ccv_run_bbf_feature(feature, steps, u8)];
-              if (sum < classifier->threshold)
-              {
-                flag = 0;
-                break;
-              }
-            }
-            if (flag)
-            {
-              ccv_comp_t comp;
-              comp.rect = ccv_rect((int)((x * 4 + dx[q] * 2) * scale_x + 0.5), (int)((y * 4 + dy[q] * 2) * scale_y + 0.5), (int)(cascade->size.width * scale_x + 0.5), (int)(cascade->size.height * scale_y + 0.5));
-              comp.neighbors = 1;
-              comp.classification.id = t;
-              comp.classification.confidence = sum;
-              ccv_array_push(seq, &comp);
-            }
-            u8[0] += 4;
-            u8[1] += 2;
-            u8[2] += 1;
-          }
-          u8[0] += paddings[0];
-          u8[1] += paddings[1];
-          u8[2] += paddings[2];
-        }
-      }
-      scale_x *= scale;
-      scale_y *= scale;
-    }
-
-    /* the following code from OpenCV's haar feature implementation */
-    if (params.min_neighbors == 0)
-    {
-      for (i = 0; i < seq->rnum; i++)
-      {
-        ccv_comp_t *comp = (ccv_comp_t *)ccv_array_get(seq, i);
-        ccv_array_push(result_seq, comp);
-      }
-    }
-    else
-    {
-      idx_seq = 0;
-      ccv_array_clear(seq2);
-      // group retrieved rectangles in order to filter out noise
-      int ncomp = ccv_array_group(seq, &idx_seq, _ccv_is_equal_same_class, 0);
-      ccv_comp_t *comps = (ccv_comp_t *)ccmalloc((ncomp + 1) * sizeof(ccv_comp_t));
-      memset(comps, 0, (ncomp + 1) * sizeof(ccv_comp_t));
-
-      // count number of neighbors
-      for (i = 0; i < seq->rnum; i++)
-      {
-        ccv_comp_t r1 = *(ccv_comp_t *)ccv_array_get(seq, i);
-        int idx = *(int *)ccv_array_get(idx_seq, i);
-
-        if (comps[idx].neighbors == 0)
-          comps[idx].classification.confidence = r1.classification.confidence;
-
-        ++comps[idx].neighbors;
-
-        comps[idx].rect.x += r1.rect.x;
-        comps[idx].rect.y += r1.rect.y;
-        comps[idx].rect.width += r1.rect.width;
-        comps[idx].rect.height += r1.rect.height;
-        comps[idx].classification.id = r1.classification.id;
-        comps[idx].classification.confidence = ccv_max(comps[idx].classification.confidence, r1.classification.confidence);
-      }
-
-      // calculate average bounding box
-      for (i = 0; i < ncomp; i++)
-      {
-        int n = comps[i].neighbors;
-        if (n >= params.min_neighbors)
-        {
-          ccv_comp_t comp;
-          comp.rect.x = (comps[i].rect.x * 2 + n) / (2 * n);
-          comp.rect.y = (comps[i].rect.y * 2 + n) / (2 * n);
-          comp.rect.width = (comps[i].rect.width * 2 + n) / (2 * n);
-          comp.rect.height = (comps[i].rect.height * 2 + n) / (2 * n);
-          comp.neighbors = comps[i].neighbors;
-          comp.classification.id = comps[i].classification.id;
-          comp.classification.confidence = comps[i].classification.confidence;
-          ccv_array_push(seq2, &comp);
-        }
-      }
-
-      // filter out small face rectangles inside large face rectangles
-      for (i = 0; i < seq2->rnum; i++)
-      {
-        ccv_comp_t r1 = *(ccv_comp_t *)ccv_array_get(seq2, i);
-        int flag = 1;
-
-        for (j = 0; j < seq2->rnum; j++)
-        {
-          ccv_comp_t r2 = *(ccv_comp_t *)ccv_array_get(seq2, j);
-          int distance = (int)(r2.rect.width * 0.25 + 0.5);
-
-          if (i != j &&
-              r1.classification.id == r2.classification.id &&
-              r1.rect.x >= r2.rect.x - distance &&
-              r1.rect.y >= r2.rect.y - distance &&
-              r1.rect.x + r1.rect.width <= r2.rect.x + r2.rect.width + distance &&
-              r1.rect.y + r1.rect.height <= r2.rect.y + r2.rect.height + distance &&
-              (r2.neighbors > ccv_max(3, r1.neighbors) || r1.neighbors < 3))
-          {
-            flag = 0;
-            break;
-          }
-        }
-
-        if (flag)
-          ccv_array_push(result_seq, &r1);
-      }
-      ccv_array_free(idx_seq);
-      ccfree(comps);
-    }
-  }
-
-  ccv_array_free(seq);
-  ccv_array_free(seq2);
-
-  ccv_array_t *result_seq2;
-  /* the following code from OpenCV's haar feature implementation */
-  if (params.flags & CCV_BBF_NO_NESTED)
-  {
-    result_seq2 = ccv_array_new(sizeof(ccv_comp_t), 64, 0);
-    idx_seq = 0;
-    // group retrieved rectangles in order to filter out noise
-    int ncomp = ccv_array_group(result_seq, &idx_seq, _ccv_is_equal, 0);
-    ccv_comp_t *comps = (ccv_comp_t *)ccmalloc((ncomp + 1) * sizeof(ccv_comp_t));
-    memset(comps, 0, (ncomp + 1) * sizeof(ccv_comp_t));
-
-    // count number of neighbors
-    for (i = 0; i < result_seq->rnum; i++)
-    {
-      ccv_comp_t r1 = *(ccv_comp_t *)ccv_array_get(result_seq, i);
-      int idx = *(int *)ccv_array_get(idx_seq, i);
-
-      if (comps[idx].neighbors == 0 || comps[idx].classification.confidence < r1.classification.confidence)
-      {
-        comps[idx].classification.confidence = r1.classification.confidence;
-        comps[idx].neighbors = 1;
-        comps[idx].rect = r1.rect;
-        comps[idx].classification.id = r1.classification.id;
-      }
-    }
-
-    // calculate average bounding box
-    for (i = 0; i < ncomp; i++)
-      if (comps[i].neighbors)
-        ccv_array_push(result_seq2, &comps[i]);
-
-    ccv_array_free(result_seq);
-    ccfree(comps);
-  }
-  else
-  {
-    result_seq2 = result_seq;
-  }
-
-  for (i = 1; i < scale_upto + next * 2; i++)
-    ccv_matrix_free(pyr[i * 4]);
-  if (params.accurate)
-    for (i = next * 2; i < scale_upto + next * 2; i++)
-    {
-      ccv_matrix_free(pyr[i * 4 + 1]);
-      ccv_matrix_free(pyr[i * 4 + 2]);
-      ccv_matrix_free(pyr[i * 4 + 3]);
-    }
-  if (params.size.height != _cascade[0]->size.height || params.size.width != _cascade[0]->size.width)
-    ccv_matrix_free(pyr[0]);
-
-  return result_seq2;
-}
-
-ccv_bbf_classifier_cascade_t *ccv_bbf_read_classifier_cascade(const char *directory)
-{
-  char buf[1024];
-  sprintf(buf, "%s/cascade.txt", directory);
-  int s, i;
-  FILE *r = fopen(buf, "r");
-  if (r == 0)
-    return 0;
-  ccv_bbf_classifier_cascade_t *cascade = (ccv_bbf_classifier_cascade_t *)ccmalloc(sizeof(ccv_bbf_classifier_cascade_t));
-  s = fscanf(r, "%d %d %d", &cascade->count, &cascade->size.width, &cascade->size.height);
-  assert(s > 0);
-  cascade->stage_classifier = (ccv_bbf_stage_classifier_t *)ccmalloc(cascade->count * sizeof(ccv_bbf_stage_classifier_t));
-  for (i = 0; i < cascade->count; i++)
-  {
-    sprintf(buf, "%s/stage-%d.txt", directory, i);
-    if (_ccv_read_bbf_stage_classifier(buf, &cascade->stage_classifier[i]) < 0)
-    {
-      cascade->count = i;
-      break;
-    }
-  }
-  fclose(r);
-  return cascade;
-}
-
-ccv_bbf_classifier_cascade_t *ccv_bbf_classifier_cascade_read_binary(char *s)
-{
-  int i;
-  ccv_bbf_classifier_cascade_t *cascade = (ccv_bbf_classifier_cascade_t *)ccmalloc(sizeof(ccv_bbf_classifier_cascade_t));
-  memcpy(&cascade->count, s, sizeof(cascade->count));
-  s += sizeof(cascade->count);
-  memcpy(&cascade->size.width, s, sizeof(cascade->size.width));
-  s += sizeof(cascade->size.width);
-  memcpy(&cascade->size.height, s, sizeof(cascade->size.height));
-  s += sizeof(cascade->size.height);
-  ccv_bbf_stage_classifier_t *classifier = cascade->stage_classifier = (ccv_bbf_stage_classifier_t *)ccmalloc(cascade->count * sizeof(ccv_bbf_stage_classifier_t));
-  for (i = 0; i < cascade->count; i++, classifier++)
-  {
-    memcpy(&classifier->count, s, sizeof(classifier->count));
-    s += sizeof(classifier->count);
-    memcpy(&classifier->threshold, s, sizeof(classifier->threshold));
-    s += sizeof(classifier->threshold);
-    classifier->feature = (ccv_bbf_feature_t *)ccmalloc(classifier->count * sizeof(ccv_bbf_feature_t));
-    classifier->alpha = (float *)ccmalloc(classifier->count * 2 * sizeof(float));
-    memcpy(classifier->feature, s, classifier->count * sizeof(ccv_bbf_feature_t));
-    s += classifier->count * sizeof(ccv_bbf_feature_t);
-    memcpy(classifier->alpha, s, classifier->count * 2 * sizeof(float));
-    s += classifier->count * 2 * sizeof(float);
-  }
-  return cascade;
-}
-
-int ccv_bbf_classifier_cascade_write_binary(ccv_bbf_classifier_cascade_t *cascade, char *s, int slen)
-{
-  int i;
-  int len = sizeof(cascade->count) + sizeof(cascade->size.width) + sizeof(cascade->size.height);
-  ccv_bbf_stage_classifier_t *classifier = cascade->stage_classifier;
-  for (i = 0; i < cascade->count; i++, classifier++)
-    len += sizeof(classifier->count) + sizeof(classifier->threshold) + classifier->count * sizeof(ccv_bbf_feature_t) + classifier->count * 2 * sizeof(float);
-  if (slen >= len)
-  {
-    memcpy(s, &cascade->count, sizeof(cascade->count));
-    s += sizeof(cascade->count);
-    memcpy(s, &cascade->size.width, sizeof(cascade->size.width));
-    s += sizeof(cascade->size.width);
-    memcpy(s, &cascade->size.height, sizeof(cascade->size.height));
-    s += sizeof(cascade->size.height);
-    classifier = cascade->stage_classifier;
-    for (i = 0; i < cascade->count; i++, classifier++)
-    {
-      memcpy(s, &classifier->count, sizeof(classifier->count));
-      s += sizeof(classifier->count);
-      memcpy(s, &classifier->threshold, sizeof(classifier->threshold));
-      s += sizeof(classifier->threshold);
-      memcpy(s, classifier->feature, classifier->count * sizeof(ccv_bbf_feature_t));
-      s += classifier->count * sizeof(ccv_bbf_feature_t);
-      memcpy(s, classifier->alpha, classifier->count * 2 * sizeof(float));
-      s += classifier->count * 2 * sizeof(float);
-    }
-  }
-  return len;
-}
-
-void ccv_bbf_classifier_cascade_free(ccv_bbf_classifier_cascade_t *cascade)
-{
-  int i;
-  for (i = 0; i < cascade->count; ++i)
-  {
-    ccfree(cascade->stage_classifier[i].feature);
-    ccfree(cascade->stage_classifier[i].alpha);
-  }
-  ccfree(cascade->stage_classifier);
-  ccfree(cascade);
-}
\ No newline at end of file
diff --git a/test/source.clj b/test/source.clj
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.coffee b/test/source.coffee
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.cpp b/test/source.cpp
deleted file mode 100644
index 793837f..0000000
--- a/test/source.cpp
+++ /dev/null
@@ -1,1582 +0,0 @@
-#include "ccv.h"
-#include "ccv_internal.h"
-#include <sys/time.h>
-#ifdef HAVE_GSL
-#include <gsl/gsl_rng.h>
-#include <gsl/gsl_randist.h>
-#endif
-#ifdef USE_OPENMP
-#include <omp.h>
-#endif
-const ;
-
-finitario crear_finitario(info_t i) {
-  finitario nuevo = new rep_finitario;
-  nuevo->dato = i;
-  nuevo->primerio = NULL;
-  return nuevo;
-}
-
-
-const ccv_bbf_param_t ccv_bbf_default_params = {
-    .interval = 5,
-    .min_neighbors = 2,
-    .accurate = 1,
-    .flags = 0,
-    .size = {
-        24,
-        24,
-    },
-};
-
-#define _ccv_width_padding(x) (((x) + 3) & -4)
-
-static inline int _ccv_run_bbf_feature(ccv_bbf_feature_t *feature, int *step, unsigned char **u8)
-{
-#define pf_at(i) (*(u8[feature->pz[i]] + feature->px[i] + feature->py[i] * step[feature->pz[i]]))
-#define nf_at(i) (*(u8[feature->nz[i]] + feature->nx[i] + feature->ny[i] * step[feature->nz[i]]))
-  unsigned char pmin = pf_at(0), nmax = nf_at(0);
-  /* check if every point in P > every point in N, and take a shortcut */
-  if (pmin <= nmax)
-    return 0;
-  int i;
-  for (i = 1; i < feature->size; i++)
-  {
-    if (feature->pz[i] >= 0)
-    {
-      int p = pf_at(i);
-      if (p < pmin)
-      {
-        if (p <= nmax)
-          return 0;
-        pmin = p;
-      }
-    }
-    if (feature->nz[i] >= 0)
-    {
-      int n = nf_at(i);
-      if (n > nmax)
-      {
-        if (pmin <= n)
-          return 0;
-        nmax = n;
-      }
-    }
-  }
-#undef pf_at
-#undef nf_at
-  return 1;
-}
-
-static int _ccv_read_bbf_stage_classifier(const char *file, ccv_bbf_stage_classifier_t *classifier)
-{
-  FILE *r = fopen(file, "r");
-  if (r == 0)
-    return -1;
-  int stat = 0;
-  stat |= fscanf(r, "%d", &classifier->count);
-  union {
-    float fl;
-    int i;
-  } fli;
-  stat |= fscanf(r, "%d", &fli.i);
-  classifier->threshold = fli.fl;
-  classifier->feature = (ccv_bbf_feature_t *)ccmalloc(classifier->count * sizeof(ccv_bbf_feature_t));
-  classifier->alpha = (float *)ccmalloc(classifier->count * 2 * sizeof(float));
-  int i, j;
-  for (i = 0; i < classifier->count; i++)
-  {
-    stat |= fscanf(r, "%d", &classifier->feature[i].size);
-    for (j = 0; j < classifier->feature[i].size; j++)
-    {
-      stat |= fscanf(r, "%d %d %d", &classifier->feature[i].px[j], &classifier->feature[i].py[j], &classifier->feature[i].pz[j]);
-      stat |= fscanf(r, "%d %d %d", &classifier->feature[i].nx[j], &classifier->feature[i].ny[j], &classifier->feature[i].nz[j]);
-    }
-    union {
-      float fl;
-      int i;
-    } flia, flib;
-    stat |= fscanf(r, "%d %d", &flia.i, &flib.i);
-    classifier->alpha[i * 2] = flia.fl;
-    classifier->alpha[i * 2 + 1] = flib.fl;
-  }
-  fclose(r);
-  return 0;
-}
-
-#ifdef HAVE_GSL
-
-static unsigned int _ccv_bbf_time_measure()
-{
-  struct timeval tv;
-  gettimeofday(&tv, 0);
-  return tv.tv_sec * 1000000 + tv.tv_usec;
-}
-
-#define less_than(a, b, aux) ((a) < (b))
-CCV_IMPLEMENT_QSORT(_ccv_sort_32f, float, less_than)
-#undef less_than
-
-static void _ccv_bbf_eval_data(ccv_bbf_stage_classifier_t *classifier, unsigned char **posdata, int posnum, unsigned char **negdata, int negnum, ccv_size_t size, float *peval, float *neval)
-{
-  int i, j;
-  int steps[] = {_ccv_width_padding(size.width),
-                 _ccv_width_padding(size.width >> 1),
-                 _ccv_width_padding(size.width >> 2)};
-  int isizs0 = steps[0] * size.height;
-  int isizs01 = isizs0 + steps[1] * (size.height >> 1);
-  for (i = 0; i < posnum; i++)
-  {
-    unsigned char *u8[] = {posdata[i], posdata[i] + isizs0, posdata[i] + isizs01};
-    float sum = 0;
-    float *alpha = classifier->alpha;
-    ccv_bbf_feature_t *feature = classifier->feature;
-    for (j = 0; j < classifier->count; ++j, alpha += 2, ++feature)
-      sum += alpha[_ccv_run_bbf_feature(feature, steps, u8)];
-    peval[i] = sum;
-  }
-  for (i = 0; i < negnum; i++)
-  {
-    unsigned char *u8[] = {negdata[i], negdata[i] + isizs0, negdata[i] + isizs01};
-    float sum = 0;
-    float *alpha = classifier->alpha;
-    ccv_bbf_feature_t *feature = classifier->feature;
-    for (j = 0; j < classifier->count; ++j, alpha += 2, ++feature)
-      sum += alpha[_ccv_run_bbf_feature(feature, steps, u8)];
-    neval[i] = sum;
-  }
-}
-
-static int _ccv_prune_positive_data(ccv_bbf_classifier_cascade_t *cascade, unsigned char **posdata, int posnum, ccv_size_t size)
-{
-  float *peval = (float *)ccmalloc(posnum * sizeof(float));
-  int i, j, k, rpos = posnum;
-  for (i = 0; i < cascade->count; i++)
-  {
-    _ccv_bbf_eval_data(cascade->stage_classifier + i, posdata, rpos, 0, 0, size, peval, 0);
-    k = 0;
-    for (j = 0; j < rpos; j++)
-      if (peval[j] >= cascade->stage_classifier[i].threshold)
-      {
-        posdata[k] = posdata[j];
-        ++k;
-      }
-      else
-      {
-        ccfree(posdata[j]);
-      }
-    rpos = k;
-  }
-  ccfree(peval);
-  return rpos;
-}
-
-static int _ccv_prepare_background_data(ccv_bbf_classifier_cascade_t *cascade, char **bgfiles, int bgnum, unsigned char **negdata, int negnum)
-{
-  int t, i, j, k, q;
-  int negperbg;
-  int negtotal = 0;
-  int steps[] = {_ccv_width_padding(cascade->size.width),
-                 _ccv_width_padding(cascade->size.width >> 1),
-                 _ccv_width_padding(cascade->size.width >> 2)};
-  int isizs0 = steps[0] * cascade->size.height;
-  int isizs1 = steps[1] * (cascade->size.height >> 1);
-  int isizs2 = steps[2] * (cascade->size.height >> 2);
-  int *idcheck = (int *)ccmalloc(negnum * sizeof(int));
-
-  gsl_rng_env_setup();
-
-  gsl_rng *rng = gsl_rng_alloc(gsl_rng_default);
-  gsl_rng_set(rng, (unsigned long int)idcheck);
-
-  ccv_size_t imgsz = cascade->size;
-  int rneg = negtotal;
-  for (t = 0; negtotal < negnum; t++)
-  {
-    PRINT(CCV_CLI_INFO, "preparing negative data ...  0%%");
-    for (i = 0; i < bgnum; i++)
-    {
-      negperbg = (t < 2) ? (negnum - negtotal) / (bgnum - i) + 1 : negnum - negtotal;
-      ccv_dense_matrix_t *image = 0;
-      ccv_read(bgfiles[i], &image, CCV_IO_GRAY | CCV_IO_ANY_FILE);
-      assert((image->type & CCV_C1) && (image->type & CCV_8U));
-      if (image == 0)
-      {
-        PRINT(CCV_CLI_ERROR, "\n%s file corrupted\n", bgfiles[i]);
-        continue;
-      }
-      if (t % 2 != 0)
-        ccv_flip(image, 0, 0, CCV_FLIP_X);
-      if (t % 4 >= 2)
-        ccv_flip(image, 0, 0, CCV_FLIP_Y);
-      ccv_bbf_param_t params = {.interval = 3, .min_neighbors = 0, .accurate = 1, .flags = 0, .size = cascade->size};
-      ccv_array_t *detected = ccv_bbf_detect_objects(image, &cascade, 1, params);
-      memset(idcheck, 0, ccv_min(detected->rnum, negperbg) * sizeof(int));
-      for (j = 0; j < ccv_min(detected->rnum, negperbg); j++)
-      {
-        int r = gsl_rng_uniform_int(rng, detected->rnum);
-        int flag = 1;
-        ccv_rect_t *rect = (ccv_rect_t *)ccv_array_get(detected, r);
-        while (flag)
-        {
-          flag = 0;
-          for (k = 0; k < j; k++)
-            if (r == idcheck[k])
-            {
-              flag = 1;
-              r = gsl_rng_uniform_int(rng, detected->rnum);
-              break;
-            }
-          rect = (ccv_rect_t *)ccv_array_get(detected, r);
-          if ((rect->x < 0) || (rect->y < 0) || (rect->width + rect->x > image->cols) || (rect->height + rect->y > image->rows))
-          {
-            flag = 1;
-            r = gsl_rng_uniform_int(rng, detected->rnum);
-          }
-        }
-        idcheck[j] = r;
-        ccv_dense_matrix_t *temp = 0;
-        ccv_dense_matrix_t *imgs0 = 0;
-        ccv_dense_matrix_t *imgs1 = 0;
-        ccv_dense_matrix_t *imgs2 = 0;
-        ccv_slice(image, (ccv_matrix_t **)&temp, 0, rect->y, rect->x, rect->height, rect->width);
-        ccv_resample(temp, &imgs0, 0, imgsz.height, imgsz.width, CCV_INTER_AREA);
-        assert(imgs0->step == steps[0]);
-        ccv_matrix_free(temp);
-        ccv_sample_down(imgs0, &imgs1, 0, 0, 0);
-        assert(imgs1->step == steps[1]);
-        ccv_sample_down(imgs1, &imgs2, 0, 0, 0);
-        assert(imgs2->step == steps[2]);
-
-        negdata[negtotal] = (unsigned char *)ccmalloc(isizs0 + isizs1 + isizs2);
-        unsigned char *u8s0 = negdata[negtotal];
-        unsigned char *u8s1 = negdata[negtotal] + isizs0;
-        unsigned char *u8s2 = negdata[negtotal] + isizs0 + isizs1;
-        unsigned char *u8[] = {u8s0, u8s1, u8s2};
-        memcpy(u8s0, imgs0->data.u8, imgs0->rows * imgs0->step);
-        ccv_matrix_free(imgs0);
-        memcpy(u8s1, imgs1->data.u8, imgs1->rows * imgs1->step);
-        ccv_matrix_free(imgs1);
-        memcpy(u8s2, imgs2->data.u8, imgs2->rows * imgs2->step);
-        ccv_matrix_free(imgs2);
-
-        flag = 1;
-        ccv_bbf_stage_classifier_t *classifier = cascade->stage_classifier;
-        for (k = 0; k < cascade->count; ++k, ++classifier)
-        {
-          float sum = 0;
-          float *alpha = classifier->alpha;
-          ccv_bbf_feature_t *feature = classifier->feature;
-          for (q = 0; q < classifier->count; ++q, alpha += 2, ++feature)
-            sum += alpha[_ccv_run_bbf_feature(feature, steps, u8)];
-          if (sum < classifier->threshold)
-          {
-            flag = 0;
-            break;
-          }
-        }
-        if (!flag)
-          ccfree(negdata[negtotal]);
-        else
-        {
-          ++negtotal;
-          if (negtotal >= negnum)
-            break;
-        }
-      }
-      ccv_array_free(detected);
-      ccv_matrix_free(image);
-      ccv_drain_cache();
-      PRINT(CCV_CLI_INFO, "\rpreparing negative data ... %2d%%", 100 * negtotal / negnum);
-      fflush(0);
-      if (negtotal >= negnum)
-        break;
-    }
-    if (rneg == negtotal)
-      break;
-    rneg = negtotal;
-    PRINT(CCV_CLI_INFO, "\nentering additional round %d\n", t + 1);
-  }
-  gsl_rng_free(rng);
-  ccfree(idcheck);
-  ccv_drain_cache();
-  PRINT(CCV_CLI_INFO, "\n");
-  return negtotal;
-}
-
-static void _ccv_prepare_positive_data(ccv_dense_matrix_t **posimg, unsigned char **posdata, ccv_size_t size, int posnum)
-{
-  PRINT(CCV_CLI_INFO, "preparing positive data ...  0%%");
-  int i;
-  for (i = 0; i < posnum; i++)
-  {
-    ccv_dense_matrix_t *imgs0 = posimg[i];
-    ccv_dense_matrix_t *imgs1 = 0;
-    ccv_dense_matrix_t *imgs2 = 0;
-    assert((imgs0->type & CCV_C1) && (imgs0->type & CCV_8U) && imgs0->rows == size.height && imgs0->cols == size.width);
-    ccv_sample_down(imgs0, &imgs1, 0, 0, 0);
-    ccv_sample_down(imgs1, &imgs2, 0, 0, 0);
-    int isizs0 = imgs0->rows * imgs0->step;
-    int isizs1 = imgs1->rows * imgs1->step;
-    int isizs2 = imgs2->rows * imgs2->step;
-
-    posdata[i] = (unsigned char *)ccmalloc(isizs0 + isizs1 + isizs2);
-    memcpy(posdata[i], imgs0->data.u8, isizs0);
-    memcpy(posdata[i] + isizs0, imgs1->data.u8, isizs1);
-    memcpy(posdata[i] + isizs0 + isizs1, imgs2->data.u8, isizs2);
-
-    PRINT(CCV_CLI_INFO, "\rpreparing positive data ... %2d%%", 100 * (i + 1) / posnum);
-    fflush(0);
-
-    ccv_matrix_free(imgs1);
-    ccv_matrix_free(imgs2);
-  }
-  ccv_drain_cache();
-  PRINT(CCV_CLI_INFO, "\n");
-}
-
-typedef struct
-{
-  double fitness;
-  int pk, nk;
-  int age;
-  double error;
-  ccv_bbf_feature_t feature;
-} ccv_bbf_gene_t;
-
-static inline void _ccv_bbf_genetic_fitness(ccv_bbf_gene_t *gene)
-{
-  gene->fitness = (1 - gene->error) * exp(-0.01 * gene->age) * exp((gene->pk + gene->nk) * log(1.015));
-}
-
-static inline int _ccv_bbf_exist_gene_feature(ccv_bbf_gene_t *gene, int x, int y, int z)
-{
-  int i;
-  for (i = 0; i < gene->pk; i++)
-    if (z == gene->feature.pz[i] && x == gene->feature.px[i] && y == gene->feature.py[i])
-      return 1;
-  for (i = 0; i < gene->nk; i++)
-    if (z == gene->feature.nz[i] && x == gene->feature.nx[i] && y == gene->feature.ny[i])
-      return 1;
-  return 0;
-}
-
-static inline void _ccv_bbf_randomize_gene(gsl_rng *rng, ccv_bbf_gene_t *gene, int *rows, int *cols)
-{
-  int i;
-  do
-  {
-    gene->pk = gsl_rng_uniform_int(rng, CCV_BBF_POINT_MAX - 1) + 1;
-    gene->nk = gsl_rng_uniform_int(rng, CCV_BBF_POINT_MAX - 1) + 1;
-  } while (gene->pk + gene->nk < CCV_BBF_POINT_MIN); /* a hard restriction of at least 3 points have to be examed */
-  gene->feature.size = ccv_max(gene->pk, gene->nk);
-  gene->age = 0;
-  for (i = 0; i < CCV_BBF_POINT_MAX; i++)
-  {
-    gene->feature.pz[i] = -1;
-    gene->feature.nz[i] = -1;
-  }
-  int x, y, z;
-  for (i = 0; i < gene->pk; i++)
-  {
-    do
-    {
-      z = gsl_rng_uniform_int(rng, 3);
-      x = gsl_rng_uniform_int(rng, cols[z]);
-      y = gsl_rng_uniform_int(rng, rows[z]);
-    } while (_ccv_bbf_exist_gene_feature(gene, x, y, z));
-    gene->feature.pz[i] = z;
-    gene->feature.px[i] = x;
-    gene->feature.py[i] = y;
-  }
-  for (i = 0; i < gene->nk; i++)
-  {
-    do
-    {
-      z = gsl_rng_uniform_int(rng, 3);
-      x = gsl_rng_uniform_int(rng, cols[z]);
-      y = gsl_rng_uniform_int(rng, rows[z]);
-    } while (_ccv_bbf_exist_gene_feature(gene, x, y, z));
-    gene->feature.nz[i] = z;
-    gene->feature.nx[i] = x;
-    gene->feature.ny[i] = y;
-  }
-}
-
-static inline double _ccv_bbf_error_rate(ccv_bbf_feature_t *feature, unsigned char **posdata, int posnum, unsigned char **negdata, int negnum, ccv_size_t size, double *pw, double *nw)
-{
-  int i;
-  int steps[] = {_ccv_width_padding(size.width),
-                 _ccv_width_padding(size.width >> 1),
-                 _ccv_width_padding(size.width >> 2)};
-  int isizs0 = steps[0] * size.height;
-  int isizs01 = isizs0 + steps[1] * (size.height >> 1);
-  double error = 0;
-  for (i = 0; i < posnum; i++)
-  {
-    unsigned char *u8[] = {posdata[i], posdata[i] + isizs0, posdata[i] + isizs01};
-    if (!_ccv_run_bbf_feature(feature, steps, u8))
-      error += pw[i];
-  }
-  for (i = 0; i < negnum; i++)
-  {
-    unsigned char *u8[] = {negdata[i], negdata[i] + isizs0, negdata[i] + isizs01};
-    if (_ccv_run_bbf_feature(feature, steps, u8))
-      error += nw[i];
-  }
-  return error;
-}
-
-#define less_than(fit1, fit2, aux) ((fit1).fitness >= (fit2).fitness)
-static CCV_IMPLEMENT_QSORT(_ccv_bbf_genetic_qsort, ccv_bbf_gene_t, less_than)
-#undef less_than
-
-    static ccv_bbf_feature_t _ccv_bbf_genetic_optimize(unsigned char **posdata, int posnum, unsigned char **negdata, int negnum, int ftnum, ccv_size_t size, double *pw, double *nw)
-{
-  ccv_bbf_feature_t best;
-  /* seed (random method) */
-  gsl_rng_env_setup();
-  gsl_rng *rng = gsl_rng_alloc(gsl_rng_default);
-  union {
-    unsigned long int li;
-    double db;
-  } dbli;
-  dbli.db = pw[0] + nw[0];
-  gsl_rng_set(rng, dbli.li);
-  int i, j;
-  int pnum = ftnum * 100;
-  assert(pnum > 0);
-  ccv_bbf_gene_t *gene = (ccv_bbf_gene_t *)ccmalloc(pnum * sizeof(ccv_bbf_gene_t));
-  int rows[] = {size.height, size.height >> 1, size.height >> 2};
-  int cols[] = {size.width, size.width >> 1, size.width >> 2};
-  for (i = 0; i < pnum; i++)
-    _ccv_bbf_randomize_gene(rng, &gene[i], rows, cols);
-  unsigned int timer = _ccv_bbf_time_measure();
-#ifdef USE_OPENMP
-#pragma omp parallel for private(i) schedule(dynamic)
-#endif
-  for (i = 0; i < pnum; i++)
-    gene[i].error = _ccv_bbf_error_rate(&gene[i].feature, posdata, posnum, negdata, negnum, size, pw, nw);
-  timer = _ccv_bbf_time_measure() - timer;
-  for (i = 0; i < pnum; i++)
-    _ccv_bbf_genetic_fitness(&gene[i]);
-  double best_err = 1;
-  int rnum = ftnum * 39; /* number of randomize */
-  int mnum = ftnum * 40; /* number of mutation */
-  int hnum = ftnum * 20; /* number of hybrid */
-  /* iteration stop crit : best no change in 40 iterations */
-  int it = 0, t;
-  for (t = 0; it < 40; ++it, ++t)
-  {
-    int min_id = 0;
-    double min_err = gene[0].error;
-    for (i = 1; i < pnum; i++)
-      if (gene[i].error < min_err)
-      {
-        min_id = i;
-        min_err = gene[i].error;
-      }
-    min_err = gene[min_id].error = _ccv_bbf_error_rate(&gene[min_id].feature, posdata, posnum, negdata, negnum, size, pw, nw);
-    if (min_err < best_err)
-    {
-      best_err = min_err;
-      memcpy(&best, &gene[min_id].feature, sizeof(best));
-      PRINT(CCV_CLI_INFO, "best bbf feature with error %f\n|-size: %d\n|-positive point: ", best_err, best.size);
-      for (i = 0; i < best.size; i++)
-        PRINT(CCV_CLI_INFO, "(%d %d %d), ", best.px[i], best.py[i], best.pz[i]);
-      PRINT(CCV_CLI_INFO, "\n|-negative point: ");
-      for (i = 0; i < best.size; i++)
-        PRINT(CCV_CLI_INFO, "(%d %d %d), ", best.nx[i], best.ny[i], best.nz[i]);
-      PRINT(CCV_CLI_INFO, "\n");
-      it = 0;
-    }
-    PRINT(CCV_CLI_INFO, "minimum error achieved in round %d(%d) : %f with %d ms\n", t, it, min_err, timer / 1000);
-    _ccv_bbf_genetic_qsort(gene, pnum, 0);
-    for (i = 0; i < ftnum; i++)
-      ++gene[i].age;
-    for (i = ftnum; i < ftnum + mnum; i++)
-    {
-      int parent = gsl_rng_uniform_int(rng, ftnum);
-      memcpy(gene + i, gene + parent, sizeof(ccv_bbf_gene_t));
-      /* three mutation strategy : 1. add, 2. remove, 3. refine */
-      int pnm, pn = gsl_rng_uniform_int(rng, 2);
-      int *pnk[] = {&gene[i].pk, &gene[i].nk};
-      int *pnx[] = {gene[i].feature.px, gene[i].feature.nx};
-      int *pny[] = {gene[i].feature.py, gene[i].feature.ny};
-      int *pnz[] = {gene[i].feature.pz, gene[i].feature.nz};
-      int x, y, z;
-      int victim, decay = 1;
-      do
-      {
-        switch (gsl_rng_uniform_int(rng, 3))
-        {
-        case 0: /* add */
-          if (gene[i].pk == CCV_BBF_POINT_MAX && gene[i].nk == CCV_BBF_POINT_MAX)
-            break;
-          while (*pnk[pn] + 1 > CCV_BBF_POINT_MAX)
-            pn = gsl_rng_uniform_int(rng, 2);
-          do
-          {
-            z = gsl_rng_uniform_int(rng, 3);
-            x = gsl_rng_uniform_int(rng, cols[z]);
-            y = gsl_rng_uniform_int(rng, rows[z]);
-          } while (_ccv_bbf_exist_gene_feature(&gene[i], x, y, z));
-          pnz[pn][*pnk[pn]] = z;
-          pnx[pn][*pnk[pn]] = x;
-          pny[pn][*pnk[pn]] = y;
-          ++(*pnk[pn]);
-          gene[i].feature.size = ccv_max(gene[i].pk, gene[i].nk);
-          decay = gene[i].age = 0;
-          break;
-        case 1:                                             /* remove */
-          if (gene[i].pk + gene[i].nk <= CCV_BBF_POINT_MIN) /* at least 3 points have to be examed */
-            break;
-          while (*pnk[pn] - 1 <= 0) // || *pnk[pn] + *pnk[!pn] - 1 < CCV_BBF_POINT_MIN)
-            pn = gsl_rng_uniform_int(rng, 2);
-          victim = gsl_rng_uniform_int(rng, *pnk[pn]);
-          for (j = victim; j < *pnk[pn] - 1; j++)
-          {
-            pnz[pn][j] = pnz[pn][j + 1];
-            pnx[pn][j] = pnx[pn][j + 1];
-            pny[pn][j] = pny[pn][j + 1];
-          }
-          pnz[pn][*pnk[pn] - 1] = -1;
-          --(*pnk[pn]);
-          gene[i].feature.size = ccv_max(gene[i].pk, gene[i].nk);
-          decay = gene[i].age = 0;
-          break;
-        case 2: /* refine */
-          pnm = gsl_rng_uniform_int(rng, *pnk[pn]);
-          do
-          {
-            z = gsl_rng_uniform_int(rng, 3);
-            x = gsl_rng_uniform_int(rng, cols[z]);
-            y = gsl_rng_uniform_int(rng, rows[z]);
-          } while (_ccv_bbf_exist_gene_feature(&gene[i], x, y, z));
-          pnz[pn][pnm] = z;
-          pnx[pn][pnm] = x;
-          pny[pn][pnm] = y;
-          decay = gene[i].age = 0;
-          break;
-        }
-      } while (decay);
-    }
-    for (i = ftnum + mnum; i < ftnum + mnum + hnum; i++)
-    {
-      /* hybrid strategy: taking positive points from dad, negative points from mum */
-      int dad, mum;
-      do
-      {
-        dad = gsl_rng_uniform_int(rng, ftnum);
-        mum = gsl_rng_uniform_int(rng, ftnum);
-      } while (dad == mum || gene[dad].pk + gene[mum].nk < CCV_BBF_POINT_MIN); /* at least 3 points have to be examed */
-      for (j = 0; j < CCV_BBF_POINT_MAX; j++)
-      {
-        gene[i].feature.pz[j] = -1;
-        gene[i].feature.nz[j] = -1;
-      }
-      gene[i].pk = gene[dad].pk;
-      for (j = 0; j < gene[i].pk; j++)
-      {
-        gene[i].feature.pz[j] = gene[dad].feature.pz[j];
-        gene[i].feature.px[j] = gene[dad].feature.px[j];
-        gene[i].feature.py[j] = gene[dad].feature.py[j];
-      }
-      gene[i].nk = gene[mum].nk;
-      for (j = 0; j < gene[i].nk; j++)
-      {
-        gene[i].feature.nz[j] = gene[mum].feature.nz[j];
-        gene[i].feature.nx[j] = gene[mum].feature.nx[j];
-        gene[i].feature.ny[j] = gene[mum].feature.ny[j];
-      }
-      gene[i].feature.size = ccv_max(gene[i].pk, gene[i].nk);
-      gene[i].age = 0;
-    }
-    for (i = ftnum + mnum + hnum; i < ftnum + mnum + hnum + rnum; i++)
-      _ccv_bbf_randomize_gene(rng, &gene[i], rows, cols);
-    timer = _ccv_bbf_time_measure();
-#ifdef USE_OPENMP
-#pragma omp parallel for private(i) schedule(dynamic)
-#endif
-    for (i = 0; i < pnum; i++)
-      gene[i].error = _ccv_bbf_error_rate(&gene[i].feature, posdata, posnum, negdata, negnum, size, pw, nw);
-    timer = _ccv_bbf_time_measure() - timer;
-    for (i = 0; i < pnum; i++)
-      _ccv_bbf_genetic_fitness(&gene[i]);
-  }
-  ccfree(gene);
-  gsl_rng_free(rng);
-  return best;
-}
-
-#define less_than(fit1, fit2, aux) ((fit1).error < (fit2).error)
-static CCV_IMPLEMENT_QSORT(_ccv_bbf_best_qsort, ccv_bbf_gene_t, less_than)
-#undef less_than
-
-    static ccv_bbf_gene_t _ccv_bbf_best_gene(ccv_bbf_gene_t *gene, int pnum, int point_min, unsigned char **posdata, int posnum, unsigned char **negdata, int negnum, ccv_size_t size, double *pw, double *nw)
-{
-  int i;
-  unsigned int timer = _ccv_bbf_time_measure();
-#ifdef USE_OPENMP
-#pragma omp parallel for private(i) schedule(dynamic)
-#endif
-  for (i = 0; i < pnum; i++)
-    gene[i].error = _ccv_bbf_error_rate(&gene[i].feature, posdata, posnum, negdata, negnum, size, pw, nw);
-  timer = _ccv_bbf_time_measure() - timer;
-  _ccv_bbf_best_qsort(gene, pnum, 0);
-  int min_id = 0;
-  double min_err = gene[0].error;
-  for (i = 0; i < pnum; i++)
-    if (gene[i].nk + gene[i].pk >= point_min)
-    {
-      min_id = i;
-      min_err = gene[i].error;
-      break;
-    }
-  PRINT(CCV_CLI_INFO, "local best bbf feature with error %f\n|-size: %d\n|-positive point: ", min_err, gene[min_id].feature.size);
-  for (i = 0; i < gene[min_id].feature.size; i++)
-    PRINT(CCV_CLI_INFO, "(%d %d %d), ", gene[min_id].feature.px[i], gene[min_id].feature.py[i], gene[min_id].feature.pz[i]);
-  PRINT(CCV_CLI_INFO, "\n|-negative point: ");
-  for (i = 0; i < gene[min_id].feature.size; i++)
-    PRINT(CCV_CLI_INFO, "(%d %d %d), ", gene[min_id].feature.nx[i], gene[min_id].feature.ny[i], gene[min_id].feature.nz[i]);
-  PRINT(CCV_CLI_INFO, "\nthe computation takes %d ms\n", timer / 1000);
-  return gene[min_id];
-}
-
-static ccv_bbf_feature_t _ccv_bbf_convex_optimize(unsigned char **posdata, int posnum, unsigned char **negdata, int negnum, ccv_bbf_feature_t *best_feature, ccv_size_t size, double *pw, double *nw)
-{
-  ccv_bbf_gene_t best_gene;
-  /* seed (random method) */
-  gsl_rng_env_setup();
-  gsl_rng *rng = gsl_rng_alloc(gsl_rng_default);
-  union {
-    unsigned long int li;
-    double db;
-  } dbli;
-  dbli.db = pw[0] + nw[0];
-  gsl_rng_set(rng, dbli.li);
-  int i, j, k, q, p, g, t;
-  int rows[] = {size.height, size.height >> 1, size.height >> 2};
-  int cols[] = {size.width, size.width >> 1, size.width >> 2};
-  int pnum = rows[0] * cols[0] + rows[1] * cols[1] + rows[2] * cols[2];
-  ccv_bbf_gene_t *gene = (ccv_bbf_gene_t *)ccmalloc((pnum * (CCV_BBF_POINT_MAX * 2 + 1) * 2 + CCV_BBF_POINT_MAX * 2 + 1) * sizeof(ccv_bbf_gene_t));
-  if (best_feature == 0)
-  {
-    /* bootstrapping the best feature, start from two pixels, one for positive, one for negative
-		 * the bootstrapping process go like this: first, it will assign a random pixel as positive
-		 * and enumerate every possible pixel as negative, and pick the best one. Then, enumerate every
-		 * possible pixel as positive, and pick the best one, until it converges */
-    memset(&best_gene, 0, sizeof(ccv_bbf_gene_t));
-    for (i = 0; i < CCV_BBF_POINT_MAX; i++)
-      best_gene.feature.pz[i] = best_gene.feature.nz[i] = -1;
-    best_gene.pk = 1;
-    best_gene.nk = 0;
-    best_gene.feature.size = 1;
-    best_gene.feature.pz[0] = gsl_rng_uniform_int(rng, 3);
-    best_gene.feature.px[0] = gsl_rng_uniform_int(rng, cols[best_gene.feature.pz[0]]);
-    best_gene.feature.py[0] = gsl_rng_uniform_int(rng, rows[best_gene.feature.pz[0]]);
-    for (t = 0;; ++t)
-    {
-      g = 0;
-      if (t % 2 == 0)
-      {
-        for (i = 0; i < 3; i++)
-          for (j = 0; j < cols[i]; j++)
-            for (k = 0; k < rows[i]; k++)
-              if (i != best_gene.feature.pz[0] || j != best_gene.feature.px[0] || k != best_gene.feature.py[0])
-              {
-                gene[g] = best_gene;
-                gene[g].pk = gene[g].nk = 1;
-                gene[g].feature.nz[0] = i;
-                gene[g].feature.nx[0] = j;
-                gene[g].feature.ny[0] = k;
-                g++;
-              }
-      }
-      else
-      {
-        for (i = 0; i < 3; i++)
-          for (j = 0; j < cols[i]; j++)
-            for (k = 0; k < rows[i]; k++)
-              if (i != best_gene.feature.nz[0] || j != best_gene.feature.nx[0] || k != best_gene.feature.ny[0])
-              {
-                gene[g] = best_gene;
-                gene[g].pk = gene[g].nk = 1;
-                gene[g].feature.pz[0] = i;
-                gene[g].feature.px[0] = j;
-                gene[g].feature.py[0] = k;
-                g++;
-              }
-      }
-      PRINT(CCV_CLI_INFO, "bootstrapping round : %d\n", t);
-      ccv_bbf_gene_t local_gene = _ccv_bbf_best_gene(gene, g, 2, posdata, posnum, negdata, negnum, size, pw, nw);
-      if (local_gene.error >= best_gene.error - 1e-10)
-        break;
-      best_gene = local_gene;
-    }
-  }
-  else
-  {
-    best_gene.feature = *best_feature;
-    best_gene.pk = best_gene.nk = best_gene.feature.size;
-    for (i = 0; i < CCV_BBF_POINT_MAX; i++)
-      if (best_feature->pz[i] == -1)
-      {
-        best_gene.pk = i;
-        break;
-      }
-    for (i = 0; i < CCV_BBF_POINT_MAX; i++)
-      if (best_feature->nz[i] == -1)
-      {
-        best_gene.nk = i;
-        break;
-      }
-  }
-  /* after bootstrapping, the float search technique will do the following permutations:
-	 * a). add a new point to positive or negative
-	 * b). remove a point from positive or negative
-	 * c). move an existing point in positive or negative to another position
-	 * the three rules applied exhaustively, no heuristic used. */
-  for (t = 0;; ++t)
-  {
-    g = 0;
-    for (i = 0; i < 3; i++)
-      for (j = 0; j < cols[i]; j++)
-        for (k = 0; k < rows[i]; k++)
-          if (!_ccv_bbf_exist_gene_feature(&best_gene, j, k, i))
-          {
-            /* add positive point */
-            if (best_gene.pk < CCV_BBF_POINT_MAX - 1)
-            {
-              gene[g] = best_gene;
-              gene[g].feature.pz[gene[g].pk] = i;
-              gene[g].feature.px[gene[g].pk] = j;
-              gene[g].feature.py[gene[g].pk] = k;
-              gene[g].pk++;
-              gene[g].feature.size = ccv_max(gene[g].pk, gene[g].nk);
-              g++;
-            }
-            /* add negative point */
-            if (best_gene.nk < CCV_BBF_POINT_MAX - 1)
-            {
-              gene[g] = best_gene;
-              gene[g].feature.nz[gene[g].nk] = i;
-              gene[g].feature.nx[gene[g].nk] = j;
-              gene[g].feature.ny[gene[g].nk] = k;
-              gene[g].nk++;
-              gene[g].feature.size = ccv_max(gene[g].pk, gene[g].nk);
-              g++;
-            }
-            /* refine positive point */
-            for (q = 0; q < best_gene.pk; q++)
-            {
-              gene[g] = best_gene;
-              gene[g].feature.pz[q] = i;
-              gene[g].feature.px[q] = j;
-              gene[g].feature.py[q] = k;
-              g++;
-            }
-            /* add positive point, remove negative point */
-            if (best_gene.pk < CCV_BBF_POINT_MAX - 1 && best_gene.nk > 1)
-            {
-              for (q = 0; q < best_gene.nk; q++)
-              {
-                gene[g] = best_gene;
-                gene[g].feature.pz[gene[g].pk] = i;
-                gene[g].feature.px[gene[g].pk] = j;
-                gene[g].feature.py[gene[g].pk] = k;
-                gene[g].pk++;
-                for (p = q; p < best_gene.nk - 1; p++)
-                {
-                  gene[g].feature.nz[p] = gene[g].feature.nz[p + 1];
-                  gene[g].feature.nx[p] = gene[g].feature.nx[p + 1];
-                  gene[g].feature.ny[p] = gene[g].feature.ny[p + 1];
-                }
-                gene[g].feature.nz[gene[g].nk - 1] = -1;
-                gene[g].nk--;
-                gene[g].feature.size = ccv_max(gene[g].pk, gene[g].nk);
-                g++;
-              }
-            }
-            /* refine negative point */
-            for (q = 0; q < best_gene.nk; q++)
-            {
-              gene[g] = best_gene;
-              gene[g].feature.nz[q] = i;
-              gene[g].feature.nx[q] = j;
-              gene[g].feature.ny[q] = k;
-              g++;
-            }
-            /* add negative point, remove positive point */
-            if (best_gene.pk > 1 && best_gene.nk < CCV_BBF_POINT_MAX - 1)
-            {
-              for (q = 0; q < best_gene.pk; q++)
-              {
-                gene[g] = best_gene;
-                gene[g].feature.nz[gene[g].nk] = i;
-                gene[g].feature.nx[gene[g].nk] = j;
-                gene[g].feature.ny[gene[g].nk] = k;
-                gene[g].nk++;
-                for (p = q; p < best_gene.pk - 1; p++)
-                {
-                  gene[g].feature.pz[p] = gene[g].feature.pz[p + 1];
-                  gene[g].feature.px[p] = gene[g].feature.px[p + 1];
-                  gene[g].feature.py[p] = gene[g].feature.py[p + 1];
-                }
-                gene[g].feature.pz[gene[g].pk - 1] = -1;
-                gene[g].pk--;
-                gene[g].feature.size = ccv_max(gene[g].pk, gene[g].nk);
-                g++;
-              }
-            }
-          }
-    if (best_gene.pk > 1)
-      for (q = 0; q < best_gene.pk; q++)
-      {
-        gene[g] = best_gene;
-        for (i = q; i < best_gene.pk - 1; i++)
-        {
-          gene[g].feature.pz[i] = gene[g].feature.pz[i + 1];
-          gene[g].feature.px[i] = gene[g].feature.px[i + 1];
-          gene[g].feature.py[i] = gene[g].feature.py[i + 1];
-        }
-        gene[g].feature.pz[gene[g].pk - 1] = -1;
-        gene[g].pk--;
-        gene[g].feature.size = ccv_max(gene[g].pk, gene[g].nk);
-        g++;
-      }
-    if (best_gene.nk > 1)
-      for (q = 0; q < best_gene.nk; q++)
-      {
-        gene[g] = best_gene;
-        for (i = q; i < best_gene.nk - 1; i++)
-        {
-          gene[g].feature.nz[i] = gene[g].feature.nz[i + 1];
-          gene[g].feature.nx[i] = gene[g].feature.nx[i + 1];
-          gene[g].feature.ny[i] = gene[g].feature.ny[i + 1];
-        }
-        gene[g].feature.nz[gene[g].nk - 1] = -1;
-        gene[g].nk--;
-        gene[g].feature.size = ccv_max(gene[g].pk, gene[g].nk);
-        g++;
-      }
-    gene[g] = best_gene;
-    g++;
-    PRINT(CCV_CLI_INFO, "float search round : %d\n", t);
-    ccv_bbf_gene_t local_gene = _ccv_bbf_best_gene(gene, g, CCV_BBF_POINT_MIN, posdata, posnum, negdata, negnum, size, pw, nw);
-    if (local_gene.error >= best_gene.error - 1e-10)
-      break;
-    best_gene = local_gene;
-  }
-  ccfree(gene);
-  gsl_rng_free(rng);
-  return best_gene.feature;
-}
-
-static int _ccv_write_bbf_stage_classifier(const char *file, ccv_bbf_stage_classifier_t *classifier)
-{
-  FILE *w = fopen(file, "wb");
-  if (w == 0)
-    return -1;
-  fprintf(w, "%d\n", classifier->count);
-  union {
-    float fl;
-    int i;
-  } fli;
-  fli.fl = classifier->threshold;
-  fprintf(w, "%d\n", fli.i);
-  int i, j;
-  for (i = 0; i < classifier->count; i++)
-  {
-    fprintf(w, "%d\n", classifier->feature[i].size);
-    for (j = 0; j < classifier->feature[i].size; j++)
-    {
-      fprintf(w, "%d %d %d\n", classifier->feature[i].px[j], classifier->feature[i].py[j], classifier->feature[i].pz[j]);
-      fprintf(w, "%d %d %d\n", classifier->feature[i].nx[j], classifier->feature[i].ny[j], classifier->feature[i].nz[j]);
-    }
-    union {
-      float fl;
-      int i;
-    } flia, flib;
-    flia.fl = classifier->alpha[i * 2];
-    flib.fl = classifier->alpha[i * 2 + 1];
-    fprintf(w, "%d %d\n", flia.i, flib.i);
-  }
-  fclose(w);
-  return 0;
-}
-
-static int _ccv_read_background_data(const char *file, unsigned char **negdata, int *negnum, ccv_size_t size)
-{
-  int stat = 0;
-  FILE *r = fopen(file, "rb");
-  if (r == 0)
-    return -1;
-  stat |= fread(negnum, sizeof(int), 1, r);
-  int i;
-  int isizs012 = _ccv_width_padding(size.width) * size.height +
-                 _ccv_width_padding(size.width >> 1) * (size.height >> 1) +
-                 _ccv_width_padding(size.width >> 2) * (size.height >> 2);
-  for (i = 0; i < *negnum; i++)
-  {
-    negdata[i] = (unsigned char *)ccmalloc(isizs012);
-    stat |= fread(negdata[i], 1, isizs012, r);
-  }
-  fclose(r);
-  return 0;
-}
-
-static int _ccv_write_background_data(const char *file, unsigned char **negdata, int negnum, ccv_size_t size)
-{
-  FILE *w = fopen(file, "w");
-  if (w == 0)
-    return -1;
-  fwrite(&negnum, sizeof(int), 1, w);
-  int i;
-  int isizs012 = _ccv_width_padding(size.width) * size.height +
-                 _ccv_width_padding(size.width >> 1) * (size.height >> 1) +
-                 _ccv_width_padding(size.width >> 2) * (size.height >> 2);
-  for (i = 0; i < negnum; i++)
-    fwrite(negdata[i], 1, isizs012, w);
-  fclose(w);
-  return 0;
-}
-
-static int _ccv_resume_bbf_cascade_training_state(const char *file, int *i, int *k, int *bg, double *pw, double *nw, int posnum, int negnum)
-{
-  int stat = 0;
-  FILE *r = fopen(file, "r");
-  if (r == 0)
-    return -1;
-  stat |= fscanf(r, "%d %d %d", i, k, bg);
-  int j;
-  union {
-    double db;
-    int i[2];
-  } dbi;
-  for (j = 0; j < posnum; j++)
-  {
-    stat |= fscanf(r, "%d %d", &dbi.i[0], &dbi.i[1]);
-    pw[j] = dbi.db;
-  }
-  for (j = 0; j < negnum; j++)
-  {
-    stat |= fscanf(r, "%d %d", &dbi.i[0], &dbi.i[1]);
-    nw[j] = dbi.db;
-  }
-  fclose(r);
-  return 0;
-}
-
-static int _ccv_save_bbf_cacade_training_state(const char *file, int i, int k, int bg, double *pw, double *nw, int posnum, int negnum)
-{
-  FILE *w = fopen(file, "w");
-  if (w == 0)
-    return -1;
-  fprintf(w, "%d %d %d\n", i, k, bg);
-  int j;
-  union {
-    double db;
-    int i[2];
-  } dbi;
-  for (j = 0; j < posnum; ++j)
-  {
-    dbi.db = pw[j];
-    fprintf(w, "%d %d ", dbi.i[0], dbi.i[1]);
-  }
-  fprintf(w, "\n");
-  for (j = 0; j < negnum; ++j)
-  {
-    dbi.db = nw[j];
-    fprintf(w, "%d %d ", dbi.i[0], dbi.i[1]);
-  }
-  fprintf(w, "\n");
-  fclose(w);
-  return 0;
-}
-
-void ccv_bbf_classifier_cascade_new(ccv_dense_matrix_t **posimg, int posnum, char **bgfiles, int bgnum, int negnum, ccv_size_t size, const char *dir, ccv_bbf_new_param_t params)
-{
-  int i, j, k;
-  /* allocate memory for usage */
-  ccv_bbf_classifier_cascade_t *cascade = (ccv_bbf_classifier_cascade_t *)ccmalloc(sizeof(ccv_bbf_classifier_cascade_t));
-  cascade->count = 0;
-  cascade->size = size;
-  cascade->stage_classifier = (ccv_bbf_stage_classifier_t *)ccmalloc(sizeof(ccv_bbf_stage_classifier_t));
-  unsigned char **posdata = (unsigned char **)ccmalloc(posnum * sizeof(unsigned char *));
-  unsigned char **negdata = (unsigned char **)ccmalloc(negnum * sizeof(unsigned char *));
-  double *pw = (double *)ccmalloc(posnum * sizeof(double));
-  double *nw = (double *)ccmalloc(negnum * sizeof(double));
-  float *peval = (float *)ccmalloc(posnum * sizeof(float));
-  float *neval = (float *)ccmalloc(negnum * sizeof(float));
-  double inv_balance_k = 1. / params.balance_k;
-  /* balance factor k, and weighted with 0.01 */
-  params.balance_k *= 0.01;
-  inv_balance_k *= 0.01;
-
-  int steps[] = {_ccv_width_padding(cascade->size.width),
-                 _ccv_width_padding(cascade->size.width >> 1),
-                 _ccv_width_padding(cascade->size.width >> 2)};
-  int isizs0 = steps[0] * cascade->size.height;
-  int isizs01 = isizs0 + steps[1] * (cascade->size.height >> 1);
-
-  i = 0;
-  k = 0;
-  int bg = 0;
-  int cacheK = 10;
-  /* state resume code */
-  char buf[1024];
-  sprintf(buf, "%s/stat.txt", dir);
-  _ccv_resume_bbf_cascade_training_state(buf, &i, &k, &bg, pw, nw, posnum, negnum);
-  if (i > 0)
-  {
-    cascade->count = i;
-    ccfree(cascade->stage_classifier);
-    cascade->stage_classifier = (ccv_bbf_stage_classifier_t *)ccmalloc(i * sizeof(ccv_bbf_stage_classifier_t));
-    for (j = 0; j < i; j++)
-    {
-      sprintf(buf, "%s/stage-%d.txt", dir, j);
-      _ccv_read_bbf_stage_classifier(buf, &cascade->stage_classifier[j]);
-    }
-  }
-  if (k > 0)
-    cacheK = k;
-  int rpos, rneg = 0;
-  if (bg)
-  {
-    sprintf(buf, "%s/negs.txt", dir);
-    _ccv_read_background_data(buf, negdata, &rneg, cascade->size);
-  }
-
-  for (; i < params.layer; i++)
-  {
-    if (!bg)
-    {
-      rneg = _ccv_prepare_background_data(cascade, bgfiles, bgnum, negdata, negnum);
-      /* save state of background data */
-      sprintf(buf, "%s/negs.txt", dir);
-      _ccv_write_background_data(buf, negdata, rneg, cascade->size);
-      bg = 1;
-    }
-    double totalw;
-    /* save state of cascade : level, weight etc. */
-    sprintf(buf, "%s/stat.txt", dir);
-    _ccv_save_bbf_cacade_training_state(buf, i, k, bg, pw, nw, posnum, negnum);
-    ccv_bbf_stage_classifier_t classifier;
-    if (k > 0)
-    {
-      /* resume state of classifier */
-      sprintf(buf, "%s/stage-%d.txt", dir, i);
-      _ccv_read_bbf_stage_classifier(buf, &classifier);
-    }
-    else
-    {
-      /* initialize classifier */
-      for (j = 0; j < posnum; j++)
-        pw[j] = params.balance_k;
-      for (j = 0; j < rneg; j++)
-        nw[j] = inv_balance_k;
-      classifier.count = k;
-      classifier.threshold = 0;
-      classifier.feature = (ccv_bbf_feature_t *)ccmalloc(cacheK * sizeof(ccv_bbf_feature_t));
-      classifier.alpha = (float *)ccmalloc(cacheK * 2 * sizeof(float));
-    }
-    _ccv_prepare_positive_data(posimg, posdata, cascade->size, posnum);
-    rpos = _ccv_prune_positive_data(cascade, posdata, posnum, cascade->size);
-    PRINT(CCV_CLI_INFO, "%d postivie data and %d negative data in training\n", rpos, rneg);
-    /* reweight to 1.00 */
-    totalw = 0;
-    for (j = 0; j < rpos; j++)
-      totalw += pw[j];
-    for (j = 0; j < rneg; j++)
-      totalw += nw[j];
-    for (j = 0; j < rpos; j++)
-      pw[j] = pw[j] / totalw;
-    for (j = 0; j < rneg; j++)
-      nw[j] = nw[j] / totalw;
-    for (;; k++)
-    {
-      /* get overall true-positive, false-positive rate and threshold */
-      double tp = 0, fp = 0, etp = 0, efp = 0;
-      _ccv_bbf_eval_data(&classifier, posdata, rpos, negdata, rneg, cascade->size, peval, neval);
-      _ccv_sort_32f(peval, rpos, 0);
-      classifier.threshold = peval[(int)((1. - params.pos_crit) * rpos)] - 1e-6;
-      for (j = 0; j < rpos; j++)
-      {
-        if (peval[j] >= 0)
-          ++tp;
-        if (peval[j] >= classifier.threshold)
-          ++etp;
-      }
-      tp /= rpos;
-      etp /= rpos;
-      for (j = 0; j < rneg; j++)
-      {
-        if (neval[j] >= 0)
-          ++fp;
-        if (neval[j] >= classifier.threshold)
-          ++efp;
-      }
-      fp /= rneg;
-      efp /= rneg;
-      PRINT(CCV_CLI_INFO, "stage classifier real TP rate : %f, FP rate : %f\n", tp, fp);
-      PRINT(CCV_CLI_INFO, "stage classifier TP rate : %f, FP rate : %f at threshold : %f\n", etp, efp, classifier.threshold);
-      if (k > 0)
-      {
-        /* save classifier state */
-        sprintf(buf, "%s/stage-%d.txt", dir, i);
-        _ccv_write_bbf_stage_classifier(buf, &classifier);
-        sprintf(buf, "%s/stat.txt", dir);
-        _ccv_save_bbf_cacade_training_state(buf, i, k, bg, pw, nw, posnum, negnum);
-      }
-      if (etp > params.pos_crit && efp < params.neg_crit)
-        break;
-      /* TODO: more post-process is needed in here */
-
-      /* select the best feature in current distribution through genetic algorithm optimization */
-      ccv_bbf_feature_t best;
-      if (params.optimizer == CCV_BBF_GENETIC_OPT)
-      {
-        best = _ccv_bbf_genetic_optimize(posdata, rpos, negdata, rneg, params.feature_number, cascade->size, pw, nw);
-      }
-      else if (params.optimizer == CCV_BBF_FLOAT_OPT)
-      {
-        best = _ccv_bbf_convex_optimize(posdata, rpos, negdata, rneg, 0, cascade->size, pw, nw);
-      }
-      else
-      {
-        best = _ccv_bbf_genetic_optimize(posdata, rpos, negdata, rneg, params.feature_number, cascade->size, pw, nw);
-        best = _ccv_bbf_convex_optimize(posdata, rpos, negdata, rneg, &best, cascade->size, pw, nw);
-      }
-      double err = _ccv_bbf_error_rate(&best, posdata, rpos, negdata, rneg, cascade->size, pw, nw);
-      double rw = (1 - err) / err;
-      totalw = 0;
-      /* reweight */
-      for (j = 0; j < rpos; j++)
-      {
-        unsigned char *u8[] = {posdata[j], posdata[j] + isizs0, posdata[j] + isizs01};
-        if (!_ccv_run_bbf_feature(&best, steps, u8))
-          pw[j] *= rw;
-        pw[j] *= params.balance_k;
-        totalw += pw[j];
-      }
-      for (j = 0; j < rneg; j++)
-      {
-        unsigned char *u8[] = {negdata[j], negdata[j] + isizs0, negdata[j] + isizs01};
-        if (_ccv_run_bbf_feature(&best, steps, u8))
-          nw[j] *= rw;
-        nw[j] *= inv_balance_k;
-        totalw += nw[j];
-      }
-      for (j = 0; j < rpos; j++)
-        pw[j] = pw[j] / totalw;
-      for (j = 0; j < rneg; j++)
-        nw[j] = nw[j] / totalw;
-      double c = log(rw);
-      PRINT(CCV_CLI_INFO, "coefficient of feature %d: %f\n", k + 1, c);
-      classifier.count = k + 1;
-      /* resizing classifier */
-      if (k >= cacheK)
-      {
-        ccv_bbf_feature_t *feature = (ccv_bbf_feature_t *)ccmalloc(cacheK * 2 * sizeof(ccv_bbf_feature_t));
-        memcpy(feature, classifier.feature, cacheK * sizeof(ccv_bbf_feature_t));
-        ccfree(classifier.feature);
-        float *alpha = (float *)ccmalloc(cacheK * 4 * sizeof(float));
-        memcpy(alpha, classifier.alpha, cacheK * 2 * sizeof(float));
-        ccfree(classifier.alpha);
-        classifier.feature = feature;
-        classifier.alpha = alpha;
-        cacheK *= 2;
-      }
-      /* setup new feature */
-      classifier.feature[k] = best;
-      classifier.alpha[k * 2] = -c;
-      classifier.alpha[k * 2 + 1] = c;
-    }
-    cascade->count = i + 1;
-    ccv_bbf_stage_classifier_t *stage_classifier = (ccv_bbf_stage_classifier_t *)ccmalloc(cascade->count * sizeof(ccv_bbf_stage_classifier_t));
-    memcpy(stage_classifier, cascade->stage_classifier, i * sizeof(ccv_bbf_stage_classifier_t));
-    ccfree(cascade->stage_classifier);
-    stage_classifier[i] = classifier;
-    cascade->stage_classifier = stage_classifier;
-    k = 0;
-    bg = 0;
-    for (j = 0; j < rpos; j++)
-      ccfree(posdata[j]);
-    for (j = 0; j < rneg; j++)
-      ccfree(negdata[j]);
-  }
-
-  ccfree(neval);
-  ccfree(peval);
-  ccfree(nw);
-  ccfree(pw);
-  ccfree(negdata);
-  ccfree(posdata);
-  ccfree(cascade);
-}
-#else
-void ccv_bbf_classifier_cascade_new(ccv_dense_matrix_t **posimg, int posnum, char **bgfiles, int bgnum, int negnum, ccv_size_t size, const char *dir, ccv_bbf_new_param_t params)
-{
-  fprintf(stderr, " ccv_bbf_classifier_cascade_new requires libgsl support, please compile ccv with libgsl.\n");
-}
-#endif
-
-static int _ccv_is_equal(const void *_r1, const void *_r2, void *data)
-{
-  const ccv_comp_t *r1 = (const ccv_comp_t *)_r1;
-  const ccv_comp_t *r2 = (const ccv_comp_t *)_r2;
-  int distance = (int)(r1->rect.width * 0.25 + 0.5);
-
-  return r2->rect.x <= r1->rect.x + distance &&
-         r2->rect.x >= r1->rect.x - distance &&
-         r2->rect.y <= r1->rect.y + distance &&
-         r2->rect.y >= r1->rect.y - distance &&
-         r2->rect.width <= (int)(r1->rect.width * 1.5 + 0.5) &&
-         (int)(r2->rect.width * 1.5 + 0.5) >= r1->rect.width;
-}
-
-static int _ccv_is_equal_same_class(const void *_r1, const void *_r2, void *data)
-{
-  const ccv_comp_t *r1 = (const ccv_comp_t *)_r1;
-  const ccv_comp_t *r2 = (const ccv_comp_t *)_r2;
-  int distance = (int)(r1->rect.width * 0.25 + 0.5);
-
-  return r2->classification.id == r1->classification.id &&
-         r2->rect.x <= r1->rect.x + distance &&
-         r2->rect.x >= r1->rect.x - distance &&
-         r2->rect.y <= r1->rect.y + distance &&
-         r2->rect.y >= r1->rect.y - distance &&
-         r2->rect.width <= (int)(r1->rect.width * 1.5 + 0.5) &&
-         (int)(r2->rect.width * 1.5 + 0.5) >= r1->rect.width;
-}
-
-ccv_array_t *ccv_bbf_detect_objects(ccv_dense_matrix_t *a, ccv_bbf_classifier_cascade_t **_cascade, int count, ccv_bbf_param_t params)
-{
-  int hr = a->rows / params.size.height;
-  int wr = a->cols / params.size.width;
-  double scale = pow(2., 1. / (params.interval + 1.));
-  int next = params.interval + 1;
-  int scale_upto = (int)(log((double)ccv_min(hr, wr)) / log(scale));
-  ccv_dense_matrix_t **pyr = (ccv_dense_matrix_t **)alloca((scale_upto + next * 2) * 4 * sizeof(ccv_dense_matrix_t *));
-  memset(pyr, 0, (scale_upto + next * 2) * 4 * sizeof(ccv_dense_matrix_t *));
-  if (params.size.height != _cascade[0]->size.height || params.size.width != _cascade[0]->size.width)
-    ccv_resample(a, &pyr[0], 0, a->rows * _cascade[0]->size.height / params.size.height, a->cols * _cascade[0]->size.width / params.size.width, CCV_INTER_AREA);
-  else
-    pyr[0] = a;
-  int i, j, k, t, x, y, q;
-  for (i = 1; i < ccv_min(params.interval + 1, scale_upto + next * 2); i++)
-    ccv_resample(pyr[0], &pyr[i * 4], 0, (int)(pyr[0]->rows / pow(scale, i)), (int)(pyr[0]->cols / pow(scale, i)), CCV_INTER_AREA);
-  for (i = next; i < scale_upto + next * 2; i++)
-    ccv_sample_down(pyr[i * 4 - next * 4], &pyr[i * 4], 0, 0, 0);
-  if (params.accurate)
-    for (i = next * 2; i < scale_upto + next * 2; i++)
-    {
-      ccv_sample_down(pyr[i * 4 - next * 4], &pyr[i * 4 + 1], 0, 1, 0);
-      ccv_sample_down(pyr[i * 4 - next * 4], &pyr[i * 4 + 2], 0, 0, 1);
-      ccv_sample_down(pyr[i * 4 - next * 4], &pyr[i * 4 + 3], 0, 1, 1);
-    }
-  ccv_array_t *idx_seq;
-  ccv_array_t *seq = ccv_array_new(sizeof(ccv_comp_t), 64, 0);
-  ccv_array_t *seq2 = ccv_array_new(sizeof(ccv_comp_t), 64, 0);
-  ccv_array_t *result_seq = ccv_array_new(sizeof(ccv_comp_t), 64, 0);
-  /* detect in multi scale */
-  for (t = 0; t < count; t++)
-  {
-    ccv_bbf_classifier_cascade_t *cascade = _cascade[t];
-    float scale_x = (float)params.size.width / (float)cascade->size.width;
-    float scale_y = (float)params.size.height / (float)cascade->size.height;
-    ccv_array_clear(seq);
-    for (i = 0; i < scale_upto; i++)
-    {
-      int dx[] = {0, 1, 0, 1};
-      int dy[] = {0, 0, 1, 1};
-      int i_rows = pyr[i * 4 + next * 8]->rows - (cascade->size.height >> 2);
-      int steps[] = {pyr[i * 4]->step, pyr[i * 4 + next * 4]->step, pyr[i * 4 + next * 8]->step};
-      int i_cols = pyr[i * 4 + next * 8]->cols - (cascade->size.width >> 2);
-      int paddings[] = {pyr[i * 4]->step * 4 - i_cols * 4,
-                        pyr[i * 4 + next * 4]->step * 2 - i_cols * 2,
-                        pyr[i * 4 + next * 8]->step - i_cols};
-      for (q = 0; q < (params.accurate ? 4 : 1); q++)
-      {
-        unsigned char *u8[] = {pyr[i * 4]->data.u8 + dx[q] * 2 + dy[q] * pyr[i * 4]->step * 2, pyr[i * 4 + next * 4]->data.u8 + dx[q] + dy[q] * pyr[i * 4 + next * 4]->step, pyr[i * 4 + next * 8 + q]->data.u8};
-        for (y = 0; y < i_rows; y++)
-        {
-          for (x = 0; x < i_cols; x++)
-          {
-            float sum;
-            int flag = 1;
-            ccv_bbf_stage_classifier_t *classifier = cascade->stage_classifier;
-            for (j = 0; j < cascade->count; ++j, ++classifier)
-            {
-              sum = 0;
-              float *alpha = classifier->alpha;
-              ccv_bbf_feature_t *feature = classifier->feature;
-              for (k = 0; k < classifier->count; ++k, alpha += 2, ++feature)
-                sum += alpha[_ccv_run_bbf_feature(feature, steps, u8)];
-              if (sum < classifier->threshold)
-              {
-                flag = 0;
-                break;
-              }
-            }
-            if (flag)
-            {
-              ccv_comp_t comp;
-              comp.rect = ccv_rect((int)((x * 4 + dx[q] * 2) * scale_x + 0.5), (int)((y * 4 + dy[q] * 2) * scale_y + 0.5), (int)(cascade->size.width * scale_x + 0.5), (int)(cascade->size.height * scale_y + 0.5));
-              comp.neighbors = 1;
-              comp.classification.id = t;
-              comp.classification.confidence = sum;
-              ccv_array_push(seq, &comp);
-            }
-            u8[0] += 4;
-            u8[1] += 2;
-            u8[2] += 1;
-          }
-          u8[0] += paddings[0];
-          u8[1] += paddings[1];
-          u8[2] += paddings[2];
-        }
-      }
-      scale_x *= scale;
-      scale_y *= scale;
-    }
-
-    /* the following code from OpenCV's haar feature implementation */
-    if (params.min_neighbors == 0)
-    {
-      for (i = 0; i < seq->rnum; i++)
-      {
-        ccv_comp_t *comp = (ccv_comp_t *)ccv_array_get(seq, i);
-        ccv_array_push(result_seq, comp);
-      }
-    }
-    else
-    {
-      idx_seq = 0;
-      ccv_array_clear(seq2);
-      // group retrieved rectangles in order to filter out noise
-      int ncomp = ccv_array_group(seq, &idx_seq, _ccv_is_equal_same_class, 0);
-      ccv_comp_t *comps = (ccv_comp_t *)ccmalloc((ncomp + 1) * sizeof(ccv_comp_t));
-      memset(comps, 0, (ncomp + 1) * sizeof(ccv_comp_t));
-
-      // count number of neighbors
-      for (i = 0; i < seq->rnum; i++)
-      {
-        ccv_comp_t r1 = *(ccv_comp_t *)ccv_array_get(seq, i);
-        int idx = *(int *)ccv_array_get(idx_seq, i);
-
-        if (comps[idx].neighbors == 0)
-          comps[idx].classification.confidence = r1.classification.confidence;
-
-        ++comps[idx].neighbors;
-
-        comps[idx].rect.x += r1.rect.x;
-        comps[idx].rect.y += r1.rect.y;
-        comps[idx].rect.width += r1.rect.width;
-        comps[idx].rect.height += r1.rect.height;
-        comps[idx].classification.id = r1.classification.id;
-        comps[idx].classification.confidence = ccv_max(comps[idx].classification.confidence, r1.classification.confidence);
-      }
-
-      // calculate average bounding box
-      for (i = 0; i < ncomp; i++)
-      {
-        int n = comps[i].neighbors;
-        if (n >= params.min_neighbors)
-        {
-          ccv_comp_t comp;
-          comp.rect.x = (comps[i].rect.x * 2 + n) / (2 * n);
-          comp.rect.y = (comps[i].rect.y * 2 + n) / (2 * n);
-          comp.rect.width = (comps[i].rect.width * 2 + n) / (2 * n);
-          comp.rect.height = (comps[i].rect.height * 2 + n) / (2 * n);
-          comp.neighbors = comps[i].neighbors;
-          comp.classification.id = comps[i].classification.id;
-          comp.classification.confidence = comps[i].classification.confidence;
-          ccv_array_push(seq2, &comp);
-        }
-      }
-
-      // filter out small face rectangles inside large face rectangles
-      for (i = 0; i < seq2->rnum; i++)
-      {
-        ccv_comp_t r1 = *(ccv_comp_t *)ccv_array_get(seq2, i);
-        int flag = 1;
-
-        for (j = 0; j < seq2->rnum; j++)
-        {
-          ccv_comp_t r2 = *(ccv_comp_t *)ccv_array_get(seq2, j);
-          int distance = (int)(r2.rect.width * 0.25 + 0.5);
-
-          if (i != j &&
-              r1.classification.id == r2.classification.id &&
-              r1.rect.x >= r2.rect.x - distance &&
-              r1.rect.y >= r2.rect.y - distance &&
-              r1.rect.x + r1.rect.width <= r2.rect.x + r2.rect.width + distance &&
-              r1.rect.y + r1.rect.height <= r2.rect.y + r2.rect.height + distance &&
-              (r2.neighbors > ccv_max(3, r1.neighbors) || r1.neighbors < 3))
-          {
-            flag = 0;
-            break;
-          }
-        }
-
-        if (flag)
-          ccv_array_push(result_seq, &r1);
-      }
-      ccv_array_free(idx_seq);
-      ccfree(comps);
-    }
-  }
-
-  ccv_array_free(seq);
-  ccv_array_free(seq2);
-
-  ccv_array_t *result_seq2;
-  /* the following code from OpenCV's haar feature implementation */
-  if (params.flags & CCV_BBF_NO_NESTED)
-  {
-    result_seq2 = ccv_array_new(sizeof(ccv_comp_t), 64, 0);
-    idx_seq = 0;
-    // group retrieved rectangles in order to filter out noise
-    int ncomp = ccv_array_group(result_seq, &idx_seq, _ccv_is_equal, 0);
-    ccv_comp_t *comps = (ccv_comp_t *)ccmalloc((ncomp + 1) * sizeof(ccv_comp_t));
-    memset(comps, 0, (ncomp + 1) * sizeof(ccv_comp_t));
-
-    // count number of neighbors
-    for (i = 0; i < result_seq->rnum; i++)
-    {
-      ccv_comp_t r1 = *(ccv_comp_t *)ccv_array_get(result_seq, i);
-      int idx = *(int *)ccv_array_get(idx_seq, i);
-
-      if (comps[idx].neighbors == 0 || comps[idx].classification.confidence < r1.classification.confidence)
-      {
-        comps[idx].classification.confidence = r1.classification.confidence;
-        comps[idx].neighbors = 1;
-        comps[idx].rect = r1.rect;
-        comps[idx].classification.id = r1.classification.id;
-      }
-    }
-
-    // calculate average bounding box
-    for (i = 0; i < ncomp; i++)
-      if (comps[i].neighbors)
-        ccv_array_push(result_seq2, &comps[i]);
-
-    ccv_array_free(result_seq);
-    ccfree(comps);
-  }
-  else
-  {
-    result_seq2 = result_seq;
-  }
-
-  for (i = 1; i < scale_upto + next * 2; i++)
-    ccv_matrix_free(pyr[i * 4]);
-  if (params.accurate)
-    for (i = next * 2; i < scale_upto + next * 2; i++)
-    {
-      ccv_matrix_free(pyr[i * 4 + 1]);
-      ccv_matrix_free(pyr[i * 4 + 2]);
-      ccv_matrix_free(pyr[i * 4 + 3]);
-    }
-  if (params.size.height != _cascade[0]->size.height || params.size.width != _cascade[0]->size.width)
-    ccv_matrix_free(pyr[0]);
-
-  return result_seq2;
-}
-
-ccv_bbf_classifier_cascade_t *ccv_bbf_read_classifier_cascade(const char *directory)
-{
-  char buf[1024];
-  sprintf(buf, "%s/cascade.txt", directory);
-  int s, i;
-  FILE *r = fopen(buf, "r");
-  if (r == 0)
-    return 0;
-  ccv_bbf_classifier_cascade_t *cascade = (ccv_bbf_classifier_cascade_t *)ccmalloc(sizeof(ccv_bbf_classifier_cascade_t));
-  s = fscanf(r, "%d %d %d", &cascade->count, &cascade->size.width, &cascade->size.height);
-  assert(s > 0);
-  cascade->stage_classifier = (ccv_bbf_stage_classifier_t *)ccmalloc(cascade->count * sizeof(ccv_bbf_stage_classifier_t));
-  for (i = 0; i < cascade->count; i++)
-  {
-    sprintf(buf, "%s/stage-%d.txt", directory, i);
-    if (_ccv_read_bbf_stage_classifier(buf, &cascade->stage_classifier[i]) < 0)
-    {
-      cascade->count = i;
-      break;
-    }
-  }
-  fclose(r);
-  return cascade;
-}
-
-ccv_bbf_classifier_cascade_t *ccv_bbf_classifier_cascade_read_binary(char *s)
-{
-  int i;
-  ccv_bbf_classifier_cascade_t *cascade = (ccv_bbf_classifier_cascade_t *)ccmalloc(sizeof(ccv_bbf_classifier_cascade_t));
-  memcpy(&cascade->count, s, sizeof(cascade->count));
-  s += sizeof(cascade->count);
-  memcpy(&cascade->size.width, s, sizeof(cascade->size.width));
-  s += sizeof(cascade->size.width);
-  memcpy(&cascade->size.height, s, sizeof(cascade->size.height));
-  s += sizeof(cascade->size.height);
-  ccv_bbf_stage_classifier_t *classifier = cascade->stage_classifier = (ccv_bbf_stage_classifier_t *)ccmalloc(cascade->count * sizeof(ccv_bbf_stage_classifier_t));
-  for (i = 0; i < cascade->count; i++, classifier++)
-  {
-    memcpy(&classifier->count, s, sizeof(classifier->count));
-    s += sizeof(classifier->count);
-    memcpy(&classifier->threshold, s, sizeof(classifier->threshold));
-    s += sizeof(classifier->threshold);
-    classifier->feature = (ccv_bbf_feature_t *)ccmalloc(classifier->count * sizeof(ccv_bbf_feature_t));
-    classifier->alpha = (float *)ccmalloc(classifier->count * 2 * sizeof(float));
-    memcpy(classifier->feature, s, classifier->count * sizeof(ccv_bbf_feature_t));
-    s += classifier->count * sizeof(ccv_bbf_feature_t);
-    memcpy(classifier->alpha, s, classifier->count * 2 * sizeof(float));
-    s += classifier->count * 2 * sizeof(float);
-  }
-  return cascade;
-}
-
-int ccv_bbf_classifier_cascade_write_binary(ccv_bbf_classifier_cascade_t *cascade, char *s, int slen)
-{
-  int i;
-  int len = sizeof(cascade->count) + sizeof(cascade->size.width) + sizeof(cascade->size.height);
-  ccv_bbf_stage_classifier_t *classifier = cascade->stage_classifier;
-  for (i = 0; i < cascade->count; i++, classifier++)
-    len += sizeof(classifier->count) + sizeof(classifier->threshold) + classifier->count * sizeof(ccv_bbf_feature_t) + classifier->count * 2 * sizeof(float);
-  if (slen >= len)
-  {
-    memcpy(s, &cascade->count, sizeof(cascade->count));
-    s += sizeof(cascade->count);
-    memcpy(s, &cascade->size.width, sizeof(cascade->size.width));
-    s += sizeof(cascade->size.width);
-    memcpy(s, &cascade->size.height, sizeof(cascade->size.height));
-    s += sizeof(cascade->size.height);
-    classifier = cascade->stage_classifier;
-    for (i = 0; i < cascade->count; i++, classifier++)
-    {
-      memcpy(s, &classifier->count, sizeof(classifier->count));
-      s += sizeof(classifier->count);
-      memcpy(s, &classifier->threshold, sizeof(classifier->threshold));
-      s += sizeof(classifier->threshold);
-      memcpy(s, classifier->feature, classifier->count * sizeof(ccv_bbf_feature_t));
-      s += classifier->count * sizeof(ccv_bbf_feature_t);
-      memcpy(s, classifier->alpha, classifier->count * 2 * sizeof(float));
-      s += classifier->count * 2 * sizeof(float);
-    }
-  }
-  return len;
-}
-
-void ccv_bbf_classifier_cascade_free(ccv_bbf_classifier_cascade_t *cascade)
-{
-  int i;
-  for (i = 0; i < cascade->count; ++i)
-  {
-    ccfree(cascade->stage_classifier[i].feature);
-    ccfree(cascade->stage_classifier[i].alpha);
-  }
-  ccfree(cascade->stage_classifier);
-  ccfree(cascade);
-}
\ No newline at end of file
diff --git a/test/source.cs b/test/source.cs
deleted file mode 100644
index b2aad3b..0000000
--- a/test/source.cs
+++ /dev/null
@@ -1,259 +0,0 @@
-using System;
-using System.Diagnostics;
-using System.IO;
-using System.IO.Compression;
-using System.Runtime.InteropServices;
-using System.Windows.Forms;
-using Microsoft.Win32;
-using Shadowsocks.Controller;
-
-namespace Shadowsocks.Util
-{
-    public struct BandwidthScaleInfo
-    {
-        public float value;
-        public string unitName;
-        public long unit;
-
-        public BandwidthScaleInfo(float value, string unitName, long unit)
-        {
-            this.value = value;
-            this.unitName = unitName;
-            this.unit = unit;
-        }
-    }
-
-    public static class Utils
-    {
-        private static string _tempPath = null;
-
-        // return path to store temporary files
-        public static string GetTempPath()
-        {
-            if (_tempPath == null)
-            {
-                try
-                {
-                    Directory.CreateDirectory(Path.Combine(Application.StartupPath, "ss_win_temp"));
-                    // don't use "/", it will fail when we call explorer /select xxx/ss_win_temp\xxx.log
-                    _tempPath = Path.Combine(Application.StartupPath, "ss_win_temp");
-                }
-                catch (Exception e)
-                {
-                    Logging.Error(e);
-                    throw;
-                }
-            }
-            return _tempPath;
-        }
-
-        // return a full path with filename combined which pointed to the temporary directory
-        public static string GetTempPath(string filename)
-        {
-            return Path.Combine(GetTempPath(), filename);
-        }
-
-        public static void ReleaseMemory(bool removePages)
-        {
-            // release any unused pages
-            // making the numbers look good in task manager
-            // this is totally nonsense in programming
-            // but good for those users who care
-            // making them happier with their everyday life
-            // which is part of user experience
-            GC.Collect(GC.MaxGeneration);
-            GC.WaitForPendingFinalizers();
-            if (removePages)
-            {
-                // as some users have pointed out
-                // removing pages from working set will cause some IO
-                // which lowered user experience for another group of users
-                //
-                // so we do 2 more things here to satisfy them:
-                // 1. only remove pages once when configuration is changed
-                // 2. add more comments here to tell users that calling
-                //    this function will not be more frequent than
-                //    IM apps writing chat logs, or web browsers writing cache files
-                //    if they're so concerned about their disk, they should
-                //    uninstall all IM apps and web browsers
-                //
-                // please open an issue if you're worried about anything else in your computer
-                // no matter it's GPU performance, monitor contrast, audio fidelity
-                // or anything else in the task manager
-                // we'll do as much as we can to help you
-                //
-                // just kidding
-                SetProcessWorkingSetSize(Process.GetCurrentProcess().Handle,
-                                         (UIntPtr)0xFFFFFFFF,
-                                         (UIntPtr)0xFFFFFFFF);
-            }
-        }
-
-        public static string UnGzip(byte[] buf)
-        {
-            byte[] buffer = new byte[1024];
-            int n;
-            using (MemoryStream sb = new MemoryStream())
-            {
-                using (GZipStream input = new GZipStream(new MemoryStream(buf),
-                                                         CompressionMode.Decompress,
-                                                         false))
-                {
-                    while ((n = input.Read(buffer, 0, buffer.Length)) > 0)
-                    {
-                        sb.Write(buffer, 0, n);
-                    }
-                }
-                return System.Text.Encoding.UTF8.GetString(sb.ToArray());
-            }
-        }
-
-        public static string FormatBandwidth(long n)
-        {
-            var result = GetBandwidthScale(n);
-            return $"{result.value:0.##}{result.unitName}";
-        }
-
-        public static string FormatBytes(long bytes)
-        {
-            const long K = 1024L;
-            const long M = K * 1024L;
-            const long G = M * 1024L;
-            const long T = G * 1024L;
-            const long P = T * 1024L;
-            const long E = P * 1024L;
-
-            if (bytes >= P * 990)
-                return (bytes / (double)E).ToString("F5") + "EiB";
-            if (bytes >= T * 990)
-                return (bytes / (double)P).ToString("F5") + "PiB";
-            if (bytes >= G * 990)
-                return (bytes / (double)T).ToString("F5") + "TiB";
-            if (bytes >= M * 990)
-            {
-                return (bytes / (double)G).ToString("F4") + "GiB";
-            }
-            if (bytes >= M * 100)
-            {
-                return (bytes / (double)M).ToString("F1") + "MiB";
-            }
-            if (bytes >= M * 10)
-            {
-                return (bytes / (double)M).ToString("F2") + "MiB";
-            }
-            if (bytes >= K * 990)
-            {
-                return (bytes / (double)M).ToString("F3") + "MiB";
-            }
-            if (bytes > K * 2)
-            {
-                return (bytes / (double)K).ToString("F1") + "KiB";
-            }
-            return bytes.ToString() + "B";
-        }
-
-        /// <summary>
-        /// Return scaled bandwidth
-        /// </summary>
-        /// <param name="n">Raw bandwidth</param>
-        /// <returns>
-        /// The BandwidthScaleInfo struct
-        /// </returns>
-        public static BandwidthScaleInfo GetBandwidthScale(long n)
-        {
-            long scale = 1;
-            float f = n;
-            string unit = "B";
-            if (f > 1024)
-            {
-                f = f / 1024;
-                scale <<= 10;
-                unit = "KiB";
-            }
-            if (f > 1024)
-            {
-                f = f / 1024;
-                scale <<= 10;
-                unit = "MiB";
-            }
-            if (f > 1024)
-            {
-                f = f / 1024;
-                scale <<= 10;
-                unit = "GiB";
-            }
-            if (f > 1024)
-            {
-                f = f / 1024;
-                scale <<= 10;
-                unit = "TiB";
-            }
-            return new BandwidthScaleInfo(f, unit, scale);
-        }
-
-        public static RegistryKey OpenRegKey(string name, bool writable, RegistryHive hive = RegistryHive.CurrentUser)
-        {
-            // we are building x86 binary for both x86 and x64, which will
-            // cause problem when opening registry key
-            // detect operating system instead of CPU
-            if (name.IsNullOrEmpty()) throw new ArgumentException(nameof(name));
-            try
-            {
-                RegistryKey userKey = RegistryKey.OpenBaseKey(hive,
-                        Environment.Is64BitOperatingSystem ? RegistryView.Registry64 : RegistryView.Registry32)
-                    .OpenSubKey(name, writable);
-                return userKey;
-            }
-            catch (ArgumentException ae)
-            {
-                MessageBox.Show("OpenRegKey: " + ae.ToString());
-                return null;
-            }
-            catch (Exception e)
-            {
-                Logging.LogUsefulException(e);
-                return null;
-            }
-        }
-
-        public static bool IsWinVistaOrHigher()
-        {
-            return Environment.OSVersion.Version.Major > 5;
-        }
-
-        [DllImport("kernel32.dll")]
-        [return: MarshalAs(UnmanagedType.Bool)]
-        private static extern bool SetProcessWorkingSetSize(IntPtr process,
-            UIntPtr minimumWorkingSetSize, UIntPtr maximumWorkingSetSize);
-
-
-        // See: https://msdn.microsoft.com/en-us/library/hh925568(v=vs.110).aspx
-        public static bool IsSupportedRuntimeVersion()
-        {
-            /*
-             * +-----------------------------------------------------------------+----------------------------+
-             * | Version                                                         | Value of the Release DWORD |
-             * +-----------------------------------------------------------------+----------------------------+
-             * | .NET Framework 4.6.2 installed on Windows 10 Anniversary Update | 394802                     |
-             * | .NET Framework 4.6.2 installed on all other Windows OS versions | 394806                     |
-             * +-----------------------------------------------------------------+----------------------------+
-             */
-            const int minSupportedRelease = 394802;
-
-            const string subkey = @"SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full\";
-            using (var ndpKey = OpenRegKey(subkey, false, RegistryHive.LocalMachine))
-            {
-                if (ndpKey?.GetValue("Release") != null)
-                {
-                    var releaseKey = (int)ndpKey.GetValue("Release");
-
-                    if (releaseKey >= minSupportedRelease)
-                    {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        }
-    }
-}
\ No newline at end of file
diff --git a/test/source.css b/test/source.css
deleted file mode 100644
index 8214563..0000000
--- a/test/source.css
+++ /dev/null
@@ -1,61 +0,0 @@
-
-body {
- font-family: arial;
-}
-
-h1, p, table {
- background-color:#CCC;
- border: 1px solid;
- color:#39F;
- text-align: center;
- width: 100%;
-}
-
-.addon-store .pagehead h1
-.addon-store .addon-summary:after { clear: both }
-
-#addon-store .pagehead .electrocat-small {
-   bottom: -7px;
-   position: absolute;
-   right: 0;
-}
-
-.addon-store .addons-nav a.selected {
-   border-bottom-color: #d26911;
-   color: #333;
-   font-weight: bold;
-   padding: 0 0 14px;
-}
-
-.addon-store .addon-icon {
-   background: #fff;
-   border: 1px solid #ddd;
-   box-shadow: 0 1px 2px rgba(0,0,0,0.15);
-   float: left;
-   height: 80px;
-   margin-right: 14px;
-   width: 80px;
-}
-
-.addon-store .developer-callout {
-   background-color: #f1f1f1;
-   background-image: -moz-linear-gradient(#fafafa, #f1f1f1);
-   background-image: -webkit-linear-gradient(#fafafa, #f1f1f1);
-   background-image: linear-gradient(#fafafa, #f1f1f1);
-   background-repeat: repeat-x;
-   border: 1px solid #ddd;
-   border-bottom: 1px solid #ccc;
-   border-radius: 3px;
-   box-shadow: inset 0 1px 0 #fff, 0 1px 5px #f1f1f1;
-   margin-top: 40px;
-   text-shadow: 0 1px 0 #fff;
-}
-
-.addon-field-editor .addon-field-list, .addon-field-editor .addon-new-field {
-   -moz-box-sizing: border-box;
-   border-radius: 3px;
-   box-sizing: border-box;
-   display: inline-block;
-   text-align: center;
-   width: 595px;
-}
\ No newline at end of file
diff --git a/test/source.csx b/test/source.csx
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.d b/test/source.d
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.do b/test/source.do
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.dot b/test/source.dot
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.erl b/test/source.erl
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.ex b/test/source.ex
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.go b/test/source.go
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.gql b/test/source.gql
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.gradle b/test/source.gradle
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.graphql b/test/source.graphql
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.groovy b/test/source.groovy
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.h b/test/source.h
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.haml b/test/source.haml
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.hs b/test/source.hs
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.html b/test/source.html
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.html.eex b/test/source.html.eex
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.hx b/test/source.hx
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.jade b/test/source.jade
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.java b/test/source.java
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.jl b/test/source.jl
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.json b/test/source.json
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.jsp b/test/source.jsp
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.jsx b/test/source.jsx
deleted file mode 100644
index 8337712..0000000
--- a/test/source.jsx
+++ /dev/null
@@ -1 +0,0 @@
-//
diff --git a/test/source.less b/test/source.less
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.liquid b/test/source.liquid
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.lisp b/test/source.lisp
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.lsl b/test/source.lsl
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.lua b/test/source.lua
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.m b/test/source.m
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.matlab b/test/source.matlab
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.mjs b/test/source.mjs
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.ml b/test/source.ml
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.mustache b/test/source.mustache
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.note b/test/source.note
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.pcss b/test/source.pcss
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.php b/test/source.php
deleted file mode 100644
index c20c54a..0000000
--- a/test/source.php
+++ /dev/null
@@ -1,57 +0,0 @@
-<?php
-/**
-function hello($world) {}
-*/
-
-// base class with member properties and methods
-class Vegetable {
-
-   var $edible;
-   var $color;
-
-   Something::class;
-   SomeThing::class;
-
-   function Vegetable($edible, $color="green")
-   {
-       $this->edible = $edible;
-       $this->color = $color;
-   }
-
-   function is_edible()
-   {
-       return $this->edible;
-   }
-
-   function what_color()
-   {
-       return $this->color;
-   }
-
-} // end of class Vegetable
-
-// extends the base class
-class Spinach extends Vegetable {
-
-
-   var $cooked = false;
-
-   function Spinach()
-   {
-       $this->Vegetable(true, "green");
-   }
-
-   function cook_it()
-   {
-       $this->cooked = true;
-   }
-
-   function is_cooked()
-   {
-       return $this->cooked;
-   }
-
-} // end of class Spinach
-
-?>
-
diff --git a/test/source.pl b/test/source.pl
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.postcss b/test/source.postcss
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.pp b/test/source.pp
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.pug b/test/source.pug
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.py b/test/source.py
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.r b/test/source.r
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.rails b/test/source.rails
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.rb b/test/source.rb
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.re b/test/source.re
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.rei b/test/source.rei
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.rs b/test/source.rs
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.sass b/test/source.sass
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.scala b/test/source.scala
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.scss b/test/source.scss
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.slim b/test/source.slim
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.sql b/test/source.sql
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.styl b/test/source.styl
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.swift b/test/source.swift
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.swig b/test/source.swig
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.tcl b/test/source.tcl
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.tex b/test/source.tex
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.textile b/test/source.textile
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.ts b/test/source.ts
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.twig b/test/source.twig
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.vue b/test/source.vue
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.xml b/test/source.xml
deleted file mode 100644
index e69de29..0000000
diff --git a/test/source.yml b/test/source.yml
deleted file mode 100644
index e69de29..0000000
diff --git a/test/sublime.sublime-settings b/test/sublime.sublime-settings
deleted file mode 100644
index e69de29..0000000
diff --git a/test/text.md b/test/text.md
deleted file mode 100644
index e69de29..0000000
diff --git a/test/text.txt b/test/text.txt
deleted file mode 100644
index e69de29..0000000
diff --git a/test/windows.bat b/test/windows.bat
deleted file mode 100644
index e69de29..0000000
diff --git a/test/windows.cmd b/test/windows.cmd
deleted file mode 100644
index e69de29..0000000
diff --git a/test/yarn.lock b/test/yarn.lock
deleted file mode 100644
index e69de29..0000000
diff --git a/tsconfig.json b/tsconfig.json
deleted file mode 100644
index 7c6e2b7..0000000
--- a/tsconfig.json
+++ /dev/null
@@ -1,22 +0,0 @@
-{
-  "compilerOptions": {
-    "lib": [
-      "es2015"
-    ],
-    "module": "commonjs",
-    "allowUnreachableCode": false,
-    "noUnusedLocals": true,
-    "noUnusedParameters": true,
-    "noImplicitAny": true,
-    "sourceMap": true,
-    "target": "es6"
-  },
-  "include": [
-    "./**/*",
-    "./.gulp/**/*"
-  ],
-  "exclude": [
-    "node_modules",
-    "out"
-  ]
-}
\ No newline at end of file
diff --git a/typings/gulp-bump/gulp-bump.d.ts b/typings/gulp-bump/gulp-bump.d.ts
deleted file mode 100644
index 2ddc86a..0000000
--- a/typings/gulp-bump/gulp-bump.d.ts
+++ /dev/null
@@ -1,7 +0,0 @@
-declare module "gulp-bump" {
-  function gulpBump (... args: any[]): any;
-
-  namespace gulpBump {}
-
-  export = gulpBump;
-}
\ No newline at end of file
diff --git a/typings/gulp-conventional-changelog/gulp-conventional-changelog.d.ts b/typings/gulp-conventional-changelog/gulp-conventional-changelog.d.ts
deleted file mode 100644
index 5718744..0000000
--- a/typings/gulp-conventional-changelog/gulp-conventional-changelog.d.ts
+++ /dev/null
@@ -1,5 +0,0 @@
-declare module "gulp-conventional-changelog" {
-  function changelog(... args: any[]): any;
-  namespace changelog {}
-  export = changelog;
-}
\ No newline at end of file
diff --git a/typings/gulp-stats/gulp-stats.d.ts b/typings/gulp-stats/gulp-stats.d.ts
deleted file mode 100644
index 4622b92..0000000
--- a/typings/gulp-stats/gulp-stats.d.ts
+++ /dev/null
@@ -1,5 +0,0 @@
-declare module "gulp-stats" {
-  function gulpStats(... args: any[]): any;
-  namespace gulpStats {}
-  export = gulpStats;
-}
\ No newline at end of file