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__phutil_library_init__.php
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Sat, Apr 27, 11:04

__phutil_library_init__.php
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<?php
/*
* Copyright 2011 Facebook, Inc.
*
* 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
* limitations under the License.
*/
define('__LIBPHUTIL__', true);
function phutil_require_module($library, $module) {
phutil_module_stack('push', $library, $module);
phutil_require_source('__init__.php');
phutil_module_stack('pop');
}
function phutil_require_source($source) {
$base = phutil_module_stack('peek');
require_once $base.'/'.$source;
}
function phutil_module_exists($library, $module) {
$path = __phutil_library_registry('find', $library).$module.'/__init__.php';
return @file_exists($path);
}
function phutil_module_stack($op, $library = null, $module = null) {
static $stack = array();
switch ($op) {
case 'push':
$stack[] = __phutil_library_registry('find', $library).$module;
break;
case 'peek':
return end($stack);
case 'pop':
array_pop($stack);
break;
}
}
function phutil_register_library($library, $path) {
if (basename($path) != '__phutil_library_init__.php') {
throw new Exception(
'Only directories with a __phutil_library_init__.php file may be '.
'registered as libphutil libraries.');
}
return __phutil_library_registry('register', $library, dirname($path));
}
function phutil_load_library($path) {
require_once $path.'/__phutil_library_init__.php';
}
phutil_register_library('phutil', __FILE__);
function __phutil_library_registry($op, $library = null, $path = null) {
static $dict = array();
switch ($op) {
case 'register':
$dict[$library] = $path.'/';
break;
case 'find':
return $dict[$library];
case 'list':
return $dict;
}
}

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