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Diffstat (limited to 'program/lib/PEAR.php')
| -rw-r--r-- | program/lib/PEAR.php | 927 |
1 files changed, 927 insertions, 0 deletions
diff --git a/program/lib/PEAR.php b/program/lib/PEAR.php new file mode 100644 index 000000000..5b76d7540 --- /dev/null +++ b/program/lib/PEAR.php @@ -0,0 +1,927 @@ +<?php +// +// +----------------------------------------------------------------------+ +// | PHP Version 4 | +// +----------------------------------------------------------------------+ +// | Copyright (c) 1997-2002 The PHP Group | +// +----------------------------------------------------------------------+ +// | This source file is subject to version 2.0 of the PHP license, | +// | that is bundled with this package in the file LICENSE, and is | +// | available at through the world-wide-web at | +// | http://www.php.net/license/2_02.txt. | +// | If you did not receive a copy of the PHP license and are unable to | +// | obtain it through the world-wide-web, please send a note to | +// | license@php.net so we can mail you a copy immediately. | +// +----------------------------------------------------------------------+ +// | Authors: Sterling Hughes <sterling@php.net> | +// | Stig Bakken <ssb@fast.no> | +// | Tomas V.V.Cox <cox@idecnet.com> | +// +----------------------------------------------------------------------+ +// +// $Id$ +// + +define('PEAR_ERROR_RETURN', 1); +define('PEAR_ERROR_PRINT', 2); +define('PEAR_ERROR_TRIGGER', 4); +define('PEAR_ERROR_DIE', 8); +define('PEAR_ERROR_CALLBACK', 16); +define('PEAR_ZE2', (function_exists('version_compare') && + version_compare(zend_version(), "2-dev", "ge"))); + +if (substr(PHP_OS, 0, 3) == 'WIN') { + define('OS_WINDOWS', true); + define('OS_UNIX', false); + define('PEAR_OS', 'Windows'); +} else { + define('OS_WINDOWS', false); + define('OS_UNIX', true); + define('PEAR_OS', 'Unix'); // blatant assumption +} + +$GLOBALS['_PEAR_default_error_mode'] = PEAR_ERROR_RETURN; +$GLOBALS['_PEAR_default_error_options'] = E_USER_NOTICE; +$GLOBALS['_PEAR_destructor_object_list'] = array(); +$GLOBALS['_PEAR_shutdown_funcs'] = array(); +$GLOBALS['_PEAR_error_handler_stack'] = array(); + +ini_set('track_errors', true); + +/** + * Base class for other PEAR classes. Provides rudimentary + * emulation of destructors. + * + * If you want a destructor in your class, inherit PEAR and make a + * destructor method called _yourclassname (same name as the + * constructor, but with a "_" prefix). Also, in your constructor you + * have to call the PEAR constructor: $this->PEAR();. + * The destructor method will be called without parameters. Note that + * at in some SAPI implementations (such as Apache), any output during + * the request shutdown (in which destructors are called) seems to be + * discarded. If you need to get any debug information from your + * destructor, use error_log(), syslog() or something similar. + * + * IMPORTANT! To use the emulated destructors you need to create the + * objects by reference, ej: $obj =& new PEAR_child; + * + * @since PHP 4.0.2 + * @author Stig Bakken <ssb@fast.no> + * @see http://pear.php.net/manual/ + */ +class PEAR +{ + // {{{ properties + + /** + * Whether to enable internal debug messages. + * + * @var bool + * @access private + */ + var $_debug = false; + + /** + * Default error mode for this object. + * + * @var int + * @access private + */ + var $_default_error_mode = null; + + /** + * Default error options used for this object when error mode + * is PEAR_ERROR_TRIGGER. + * + * @var int + * @access private + */ + var $_default_error_options = null; + + /** + * Default error handler (callback) for this object, if error mode is + * PEAR_ERROR_CALLBACK. + * + * @var string + * @access private + */ + var $_default_error_handler = ''; + + /** + * Which class to use for error objects. + * + * @var string + * @access private + */ + var $_error_class = 'PEAR_Error'; + + /** + * An array of expected errors. + * + * @var array + * @access private + */ + var $_expected_errors = array(); + + // }}} + + // {{{ constructor + + /** + * Constructor. Registers this object in + * $_PEAR_destructor_object_list for destructor emulation if a + * destructor object exists. + * + * @param string $error_class (optional) which class to use for + * error objects, defaults to PEAR_Error. + * @access public + * @return void + */ + function PEAR($error_class = null) + { + $classname = get_class($this); + if ($this->_debug) { + print "PEAR constructor called, class=$classname\n"; + } + if ($error_class !== null) { + $this->_error_class = $error_class; + } + while ($classname) { + $destructor = "_$classname"; + if (method_exists($this, $destructor)) { + global $_PEAR_destructor_object_list; + $_PEAR_destructor_object_list[] = &$this; + break; + } else { + $classname = get_parent_class($classname); + } + } + } + + // }}} + // {{{ destructor + + /** + * Destructor (the emulated type of...). Does nothing right now, + * but is included for forward compatibility, so subclass + * destructors should always call it. + * + * See the note in the class desciption about output from + * destructors. + * + * @access public + * @return void + */ + function _PEAR() { + if ($this->_debug) { + printf("PEAR destructor called, class=%s\n", get_class($this)); + } + } + + // }}} + // {{{ getStaticProperty() + + /** + * If you have a class that's mostly/entirely static, and you need static + * properties, you can use this method to simulate them. Eg. in your method(s) + * do this: $myVar = &PEAR::getStaticProperty('myVar'); + * You MUST use a reference, or they will not persist! + * + * @access public + * @param string $class The calling classname, to prevent clashes + * @param string $var The variable to retrieve. + * @return mixed A reference to the variable. If not set it will be + * auto initialised to NULL. + */ + function &getStaticProperty($class, $var) + { + static $properties; + return $properties[$class][$var]; + } + + // }}} + // {{{ registerShutdownFunc() + + /** + * Use this function to register a shutdown method for static + * classes. + * + * @access public + * @param mixed $func The function name (or array of class/method) to call + * @param mixed $args The arguments to pass to the function + * @return void + */ + function registerShutdownFunc($func, $args = array()) + { + $GLOBALS['_PEAR_shutdown_funcs'][] = array($func, $args); + } + + // }}} + // {{{ isError() + + /** + * Tell whether a value is a PEAR error. + * + * @param mixed $data the value to test + * @access public + * @return bool true if parameter is an error + */ + function isError($data) { + return (bool)(is_object($data) && + (get_class($data) == 'pear_error' || + is_subclass_of($data, 'pear_error'))); + } + + // }}} + // {{{ setErrorHandling() + + /** + * Sets how errors generated by this DB object should be handled. + * Can be invoked both in objects and statically. If called + * statically, setErrorHandling sets the default behaviour for all + * PEAR objects. If called in an object, setErrorHandling sets + * the default behaviour for that object. + * + * @param int $mode + * One of PEAR_ERROR_RETURN, PEAR_ERROR_PRINT, + * PEAR_ERROR_TRIGGER, PEAR_ERROR_DIE or + * PEAR_ERROR_CALLBACK. + * + * @param mixed $options + * When $mode is PEAR_ERROR_TRIGGER, this is the error level (one + * of E_USER_NOTICE, E_USER_WARNING or E_USER_ERROR). + * + * When $mode is PEAR_ERROR_CALLBACK, this parameter is expected + * to be the callback function or method. A callback + * function is a string with the name of the function, a + * callback method is an array of two elements: the element + * at index 0 is the object, and the element at index 1 is + * the name of the method to call in the object. + * + * When $mode is PEAR_ERROR_PRINT or PEAR_ERROR_DIE, this is + * a printf format string used when printing the error + * message. + * + * @access public + * @return void + * @see PEAR_ERROR_RETURN + * @see PEAR_ERROR_PRINT + * @see PEAR_ERROR_TRIGGER + * @see PEAR_ERROR_DIE + * @see PEAR_ERROR_CALLBACK + * + * @since PHP 4.0.5 + */ + + function setErrorHandling($mode = null, $options = null) + { + if (isset($this)) { + $setmode = &$this->_default_error_mode; + $setoptions = &$this->_default_error_options; + } else { + $setmode = &$GLOBALS['_PEAR_default_error_mode']; + $setoptions = &$GLOBALS['_PEAR_default_error_options']; + } + + switch ($mode) { + case PEAR_ERROR_RETURN: + case PEAR_ERROR_PRINT: + case PEAR_ERROR_TRIGGER: + case PEAR_ERROR_DIE: + case null: + $setmode = $mode; + $setoptions = $options; + break; + + case PEAR_ERROR_CALLBACK: + $setmode = $mode; + if ((is_string($options) && function_exists($options)) || + (is_array($options) && method_exists(@$options[0], @$options[1]))) + { + $setoptions = $options; + } else { + trigger_error("invalid error callback", E_USER_WARNING); + } + break; + + default: + trigger_error("invalid error mode", E_USER_WARNING); + break; + } + } + + // }}} + // {{{ expectError() + + /** + * This method is used to tell which errors you expect to get. + * Expected errors are always returned with error mode + * PEAR_ERROR_RETURN. Expected error codes are stored in a stack, + * and this method pushes a new element onto it. The list of + * expected errors are in effect until they are popped off the + * stack with the popExpect() method. + * + * Note that this method can not be called statically + * + * @param mixed $code a single error code or an array of error codes to expect + * + * @return int the new depth of the "expected errors" stack + * @access public + */ + function expectError($code = '*') + { + if (is_array($code)) { + array_push($this->_expected_errors, $code); + } else { + array_push($this->_expected_errors, array($code)); + } + return sizeof($this->_expected_errors); + } + + // }}} + // {{{ popExpect() + + /** + * This method pops one element off the expected error codes + * stack. + * + * @return array the list of error codes that were popped + */ + function popExpect() + { + return array_pop($this->_expected_errors); + } + + // }}} + // {{{ _checkDelExpect() + + /** + * This method checks unsets an error code if available + * + * @param mixed error code + * @return bool true if the error code was unset, false otherwise + * @access private + * @since PHP 4.3.0 + */ + function _checkDelExpect($error_code) + { + $deleted = false; + + foreach ($this->_expected_errors AS $key => $error_array) { + if (in_array($error_code, $error_array)) { + unset($this->_expected_errors[$key][array_search($error_code, $error_array)]); + $deleted = true; + } + + // clean up empty arrays + if (0 == count($this->_expected_errors[$key])) { + unset($this->_expected_errors[$key]); + } + } + return $deleted; + } + + // }}} + // {{{ delExpect() + + /** + * This method deletes all occurences of the specified element from + * the expected error codes stack. + * + * @param mixed $error_code error code that should be deleted + * @return mixed list of error codes that were deleted or error + * @access public + * @since PHP 4.3.0 + */ + function delExpect($error_code) + { + $deleted = false; + + if ((is_array($error_code) && (0 != count($error_code)))) { + // $error_code is a non-empty array here; + // we walk through it trying to unset all + // values + foreach($error_code AS $key => $error) { + if ($this->_checkDelExpect($error)) { + $deleted = true; + } else { + $deleted = false; + } + } + return $deleted ? true : PEAR::raiseError("The expected error you submitted does not exist"); // IMPROVE ME + } elseif (!empty($error_code)) { + // $error_code comes alone, trying to unset it + if ($this->_checkDelExpect($error_code)) { + return true; + } else { + return PEAR::raiseError("The expected error you submitted does not exist"); // IMPROVE ME + } + } else { + // $error_code is empty + return PEAR::raiseError("The expected error you submitted is empty"); // IMPROVE ME + } + } + + // }}} + // {{{ raiseError() + + /** + * This method is a wrapper that returns an instance of the + * configured error class with this object's default error + * handling applied. If the $mode and $options parameters are not + * specified, the object's defaults are used. + * + * @param mixed $message a text error message or a PEAR error object + * + * @param int $code a numeric error code (it is up to your class + * to define these if you want to use codes) + * + * @param int $mode One of PEAR_ERROR_RETURN, PEAR_ERROR_PRINT, + * PEAR_ERROR_TRIGGER, PEAR_ERROR_DIE or + * PEAR_ERROR_CALLBACK. + * + * @param mixed $options If $mode is PEAR_ERROR_TRIGGER, this parameter + * specifies the PHP-internal error level (one of + * E_USER_NOTICE, E_USER_WARNING or E_USER_ERROR). + * If $mode is PEAR_ERROR_CALLBACK, this + * parameter specifies the callback function or + * method. In other error modes this parameter + * is ignored. + * + * @param string $userinfo If you need to pass along for example debug + * information, this parameter is meant for that. + * + * @param string $error_class The returned error object will be + * instantiated from this class, if specified. + * + * @param bool $skipmsg If true, raiseError will only pass error codes, + * the error message parameter will be dropped. + * + * @access public + * @return object a PEAR error object + * @see PEAR::setErrorHandling + * @since PHP 4.0.5 + */ + function &raiseError($message = null, + $code = null, + $mode = null, + $options = null, + $userinfo = null, + $error_class = null, + $skipmsg = false) + { + // The error is yet a PEAR error object + if (is_object($message)) { + $code = $message->getCode(); + $userinfo = $message->getUserInfo(); + $error_class = $message->getType(); + $message = $message->getMessage(); + } + + if (isset($this) && isset($this->_expected_errors) && sizeof($this->_expected_errors) > 0 && sizeof($exp = end($this->_expected_errors))) { + if ($exp[0] == "*" || + (is_int(reset($exp)) && in_array($code, $exp)) || + (is_string(reset($exp)) && in_array($message, $exp))) { + $mode = PEAR_ERROR_RETURN; + } + } + // No mode given, try global ones + if ($mode === null) { + // Class error handler + if (isset($this) && isset($this->_default_error_mode)) { + $mode = $this->_default_error_mode; + $options = $this->_default_error_options; + // Global error handler + } elseif (isset($GLOBALS['_PEAR_default_error_mode'])) { + $mode = $GLOBALS['_PEAR_default_error_mode']; + $options = $GLOBALS['_PEAR_default_error_options']; + } + } + + if ($error_class !== null) { + $ec = $error_class; + } elseif (isset($this) && isset($this->_error_class)) { + $ec = $this->_error_class; + } else { + $ec = 'PEAR_Error'; + } + if ($skipmsg) { + return new $ec($code, $mode, $options, $userinfo); + } else { + return new $ec($message, $code, $mode, $options, $userinfo); + } + } + + // }}} + // {{{ throwError() + + /** + * Simpler form of raiseError with fewer options. In most cases + * message, code and userinfo are enough. + * + * @param string $message + * + */ + function &throwError($message = null, + $code = null, + $userinfo = null) + { + if (isset($this)) { + return $this->raiseError($message, $code, null, null, $userinfo); + } else { + return PEAR::raiseError($message, $code, null, null, $userinfo); + } + } + + // }}} + // {{{ pushErrorHandling() + + /** + * Push a new error handler on top of the error handler options stack. With this + * you can easily override the actual error handler for some code and restore + * it later with popErrorHandling. + * + * @param mixed $mode (same as setErrorHandling) + * @param mixed $options (same as setErrorHandling) + * + * @return bool Always true + * + * @see PEAR::setErrorHandling + */ + function pushErrorHandling($mode, $options = null) + { + $stack = &$GLOBALS['_PEAR_error_handler_stack']; + if (isset($this)) { + $def_mode = &$this->_default_error_mode; + $def_options = &$this->_default_error_options; + } else { + $def_mode = &$GLOBALS['_PEAR_default_error_mode']; + $def_options = &$GLOBALS['_PEAR_default_error_options']; + } + $stack[] = array($def_mode, $def_options); + + if (isset($this)) { + $this->setErrorHandling($mode, $options); + } else { + PEAR::setErrorHandling($mode, $options); + } + $stack[] = array($mode, $options); + return true; + } + + // }}} + // {{{ popErrorHandling() + + /** + * Pop the last error handler used + * + * @return bool Always true + * + * @see PEAR::pushErrorHandling + */ + function popErrorHandling() + { + $stack = &$GLOBALS['_PEAR_error_handler_stack']; + array_pop($stack); + list($mode, $options) = $stack[sizeof($stack) - 1]; + array_pop($stack); + if (isset($this)) { + $this->setErrorHandling($mode, $options); + } else { + PEAR::setErrorHandling($mode, $options); + } + return true; + } + + // }}} + // {{{ loadExtension() + + /** + * OS independant PHP extension load. Remember to take care + * on the correct extension name for case sensitive OSes. + * + * @param string $ext The extension name + * @return bool Success or not on the dl() call + */ + function loadExtension($ext) + { + if (!extension_loaded($ext)) { + if (OS_WINDOWS) { + $suffix = '.dll'; + } elseif (PHP_OS == 'HP-UX') { + $suffix = '.sl'; + } elseif (PHP_OS == 'AIX') { + $suffix = '.a'; + } elseif (PHP_OS == 'OSX') { + $suffix = '.bundle'; + } else { + $suffix = '.so'; + } + return @dl('php_'.$ext.$suffix) || @dl($ext.$suffix); + } + return true; + } + + // }}} +} + +// {{{ _PEAR_call_destructors() + +function _PEAR_call_destructors() +{ + global $_PEAR_destructor_object_list; + if (is_array($_PEAR_destructor_object_list) && + sizeof($_PEAR_destructor_object_list)) + { + reset($_PEAR_destructor_object_list); + while (list($k, $objref) = each($_PEAR_destructor_object_list)) { + $classname = get_class($objref); + while ($classname) { + $destructor = "_$classname"; + if (method_exists($objref, $destructor)) { + $objref->$destructor(); + break; + } else { + $classname = get_parent_class($classname); + } + } + } + // Empty the object list to ensure that destructors are + // not called more than once. + $_PEAR_destructor_object_list = array(); + } + + // Now call the shutdown functions + if (is_array($GLOBALS['_PEAR_shutdown_funcs']) AND !empty($GLOBALS['_PEAR_shutdown_funcs'])) { + foreach ($GLOBALS['_PEAR_shutdown_funcs'] as $value) { + call_user_func_array($value[0], $value[1]); + } + } +} + +// }}} + +class PEAR_Error +{ + // {{{ properties + + var $error_message_prefix = ''; + var $mode = PEAR_ERROR_RETURN; + var $level = E_USER_NOTICE; + var $code = -1; + var $message = ''; + var $userinfo = ''; + + // Wait until we have a stack-groping function in PHP. + //var $file = ''; + //var $line = 0; + + + // }}} + // {{{ constructor + + /** + * PEAR_Error constructor + * + * @param string $message message + * + * @param int $code (optional) error code + * + * @param int $mode (optional) error mode, one of: PEAR_ERROR_RETURN, + * PEAR_ERROR_PRINT, PEAR_ERROR_DIE, PEAR_ERROR_TRIGGER or + * PEAR_ERROR_CALLBACK + * + * @param mixed $options (optional) error level, _OR_ in the case of + * PEAR_ERROR_CALLBACK, the callback function or object/method + * tuple. + * + * @param string $userinfo (optional) additional user/debug info + * + * @access public + * + */ + function PEAR_Error($message = 'unknown error', $code = null, + $mode = null, $options = null, $userinfo = null) + { + if ($mode === null) { + $mode = PEAR_ERROR_RETURN; + } + $this->message = $message; + $this->code = $code; + $this->mode = $mode; + $this->userinfo = $userinfo; + if ($mode & PEAR_ERROR_CALLBACK) { + $this->level = E_USER_NOTICE; + $this->callback = $options; + } else { + if ($options === null) { + $options = E_USER_NOTICE; + } + $this->level = $options; + $this->callback = null; + } + if ($this->mode & PEAR_ERROR_PRINT) { + if (is_null($options) || is_int($options)) { + $format = "%s"; + } else { + $format = $options; + } + printf($format, $this->getMessage()); + } + if ($this->mode & PEAR_ERROR_TRIGGER) { + trigger_error($this->getMessage(), $this->level); + } + if ($this->mode & PEAR_ERROR_DIE) { + $msg = $this->getMessage(); + if (is_null($options) || is_int($options)) { + $format = "%s"; + if (substr($msg, -1) != "\n") { + $msg .= "\n"; + } + } else { + $format = $options; + } + die(sprintf($format, $msg)); + } + if ($this->mode & PEAR_ERROR_CALLBACK) { + if (is_string($this->callback) && strlen($this->callback)) { + call_user_func($this->callback, $this); + } elseif (is_array($this->callback) && + sizeof($this->callback) == 2 && + is_object($this->callback[0]) && + is_string($this->callback[1]) && + strlen($this->callback[1])) { + @call_user_func($this->callback, $this); + } + } + } + + // }}} + // {{{ getMode() + + /** + * Get the error mode from an error object. + * + * @return int error mode + * @access public + */ + function getMode() { + return $this->mode; + } + + // }}} + // {{{ getCallback() + + /** + * Get the callback function/method from an error object. + * + * @return mixed callback function or object/method array + * @access public + */ + function getCallback() { + return $this->callback; + } + + // }}} + // {{{ getMessage() + + + /** + * Get the error message from an error object. + * + * @return string full error message + * @access public + */ + function getMessage() + { + return ($this->error_message_prefix . $this->message); + } + + + // }}} + // {{{ getCode() + + /** + * Get error code from an error object + * + * @return int error code + * @access public + */ + function getCode() + { + return $this->code; + } + + // }}} + // {{{ getType() + + /** + * Get the name of this error/exception. + * + * @return string error/exception name (type) + * @access public + */ + function getType() + { + return get_class($this); + } + + // }}} + // {{{ getUserInfo() + + /** + * Get additional user-supplied information. + * + * @return string user-supplied information + * @access public + */ + function getUserInfo() + { + return $this->userinfo; + } + + // }}} + // {{{ getDebugInfo() + + /** + * Get additional debug information supplied by the application. + * + * @return string debug information + * @access public + */ + function getDebugInfo() + { + return $this->getUserInfo(); + } + + // }}} + // {{{ addUserInfo() + + function addUserInfo($info) + { + if (empty($this->userinfo)) { + $this->userinfo = $info; + } else { + $this->userinfo .= " ** $info"; + } + } + + // }}} + // {{{ toString() + + /** + * Make a string representation of this object. + * + * @return string a string with an object summary + * @access public + */ + function toString() { + $modes = array(); + $levels = array(E_USER_NOTICE => 'notice', + E_USER_WARNING => 'warning', + E_USER_ERROR => 'error'); + if ($this->mode & PEAR_ERROR_CALLBACK) { + if (is_array($this->callback)) { + $callback = get_class($this->callback[0]) . '::' . + $this->callback[1]; + } else { + $callback = $this->callback; + } + return sprintf('[%s: message="%s" code=%d mode=callback '. + 'callback=%s prefix="%s" info="%s"]', + get_class($this), $this->message, $this->code, + $callback, $this->error_message_prefix, + $this->userinfo); + } + if ($this->mode & PEAR_ERROR_PRINT) { + $modes[] = 'print'; + } + if ($this->mode & PEAR_ERROR_TRIGGER) { + $modes[] = 'trigger'; + } + if ($this->mode & PEAR_ERROR_DIE) { + $modes[] = 'die'; + } + if ($this->mode & PEAR_ERROR_RETURN) { + $modes[] = 'return'; + } + return sprintf('[%s: message="%s" code=%d mode=%s level=%s '. + 'prefix="%s" info="%s"]', + get_class($this), $this->message, $this->code, + implode("|", $modes), $levels[$this->level], + $this->error_message_prefix, + $this->userinfo); + } + + // }}} +} + +register_shutdown_function("_PEAR_call_destructors"); + +/* + * Local Variables: + * mode: php + * tab-width: 4 + * c-basic-offset: 4 + * End: + */ +?> |