php-src/ext/spl/php_spl.c

/*
   +----------------------------------------------------------------------+
   | PHP Version 5                                                        |
   +----------------------------------------------------------------------+
   | Copyright (c) 1997-2008 The PHP Group                                |
   +----------------------------------------------------------------------+
   | This source file is subject to version 3.01 of the PHP license,      |
   | that is bundled with this package in the file LICENSE, and is        |
   | available through the world-wide-web at the following url:           |
   | http://www.php.net/license/3_01.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: Marcus Boerger <helly@php.net>                              |
   +----------------------------------------------------------------------+
 */

/* $Id$ */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "php.h"
#include "php_ini.h"
#include "php_main.h"
#include "ext/standard/info.h"
#include "php_spl.h"
#include "spl_functions.h"
#include "spl_engine.h"
#include "spl_array.h"
#include "spl_directory.h"
#include "spl_iterators.h"
#include "spl_exceptions.h"
#include "spl_observer.h"
#include "spl_dllist.h"
#include "spl_fixedarray.h"
#include "spl_heap.h"
#include "zend_exceptions.h"
#include "zend_interfaces.h"
#include "ext/standard/md5.h"

#ifdef COMPILE_DL_SPL
ZEND_GET_MODULE(spl)
#endif

ZEND_DECLARE_MODULE_GLOBALS(spl)

#define SPL_DEFAULT_FILE_EXTENSIONS ".inc,.php"

/* {{{ PHP_GINIT_FUNCTION
 */
static PHP_GINIT_FUNCTION(spl)
{
	spl_globals->autoload_extensions     = NULL;
	spl_globals->autoload_extensions_len = 0;
	spl_globals->autoload_functions      = NULL;
	spl_globals->autoload_running        = 0;
}
/* }}} */

static zend_class_entry * spl_find_ce_by_name(char *name, int len, zend_bool autoload TSRMLS_DC)
{
	zend_class_entry **ce;
	int found;

	if (!autoload) {
		char *lc_name;
		ALLOCA_FLAG(use_heap)

		lc_name = do_alloca(len + 1, use_heap);
		zend_str_tolower_copy(lc_name, name, len);

		found = zend_hash_find(EG(class_table), lc_name, len +1, (void **) &ce);
		free_alloca(lc_name, use_heap);
	} else {
 		found = zend_lookup_class(name, len, &ce TSRMLS_CC);
 	}
 	if (found != SUCCESS) {
		php_error_docref(NULL TSRMLS_CC, E_WARNING, "Class %s does not exist%s", name, autoload ? " and could not be loaded" : "");
		return NULL;
	}
	
	return *ce;
}

/* {{{ proto array class_parents(object instance [, boolean autoload = true])
 Return an array containing the names of all parent classes */
PHP_FUNCTION(class_parents)
{
	zval *obj;
	zend_class_entry *parent_class, *ce;
	zend_bool autoload = 1;

	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z|b", &obj, &autoload) == FAILURE) {
		RETURN_FALSE;
	}
	
	if (Z_TYPE_P(obj) != IS_OBJECT && Z_TYPE_P(obj) != IS_STRING) {
		php_error_docref(NULL TSRMLS_CC, E_WARNING, "object or string expected");
		RETURN_FALSE;
	}
	
	if (Z_TYPE_P(obj) == IS_STRING) {
		if (NULL == (ce = spl_find_ce_by_name(Z_STRVAL_P(obj), Z_STRLEN_P(obj), autoload TSRMLS_CC))) {
			RETURN_FALSE;
		}
	} else {
		ce = Z_OBJCE_P(obj);
	}
	
	array_init(return_value);
	parent_class = ce->parent;
	while (parent_class) {
		spl_add_class_name(return_value, parent_class, 0, 0 TSRMLS_CC);
		parent_class = parent_class->parent;
	}
}
/* }}} */

/* {{{ proto array class_implements(mixed what [, bool autoload ])
 Return all classes and interfaces implemented by SPL */
PHP_FUNCTION(class_implements)
{
	zval *obj;
	zend_bool autoload = 1;
	zend_class_entry *ce;
	
	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z|b", &obj, &autoload) == FAILURE) {
		RETURN_FALSE;
	}
	if (Z_TYPE_P(obj) != IS_OBJECT && Z_TYPE_P(obj) != IS_STRING) {
		php_error_docref(NULL TSRMLS_CC, E_WARNING, "object or string expected");
		RETURN_FALSE;
	}
	
	if (Z_TYPE_P(obj) == IS_STRING) {
		if (NULL == (ce = spl_find_ce_by_name(Z_STRVAL_P(obj), Z_STRLEN_P(obj), autoload TSRMLS_CC))) {
			RETURN_FALSE;
		}
	} else {
		ce = Z_OBJCE_P(obj);
	}
	
	array_init(return_value);
	spl_add_interfaces(return_value, ce, 1, ZEND_ACC_INTERFACE TSRMLS_CC);
}
/* }}} */

#define SPL_ADD_CLASS(class_name, z_list, sub, allow, ce_flags) \
	spl_add_classes(spl_ce_ ## class_name, z_list, sub, allow, ce_flags TSRMLS_CC)

#define SPL_LIST_CLASSES(z_list, sub, allow, ce_flags) \
	SPL_ADD_CLASS(AppendIterator, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(ArrayIterator, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(ArrayObject, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(BadFunctionCallException, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(BadMethodCallException, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(CachingIterator, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(Countable, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(DirectoryIterator, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(DomainException, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(EmptyIterator, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(FilesystemIterator, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(FilterIterator, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(GlobIterator, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(InfiniteIterator, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(InvalidArgumentException, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(IteratorIterator, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(LengthException, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(LimitIterator, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(LogicException, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(MultipleIterator, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(NoRewindIterator, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(OuterIterator, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(OutOfBoundsException, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(OutOfRangeException, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(OverflowException, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(ParentIterator, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(RangeException, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(RecursiveArrayIterator, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(RecursiveCachingIterator, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(RecursiveDirectoryIterator, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(RecursiveFilterIterator, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(RecursiveIterator, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(RecursiveIteratorIterator, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(RecursiveRegexIterator, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(RecursiveTreeIterator, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(RegexIterator, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(RuntimeException, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(SeekableIterator, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(SplDoublyLinkedList, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(SplFileInfo, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(SplFileObject, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(SplFixedArray, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(SplHeap, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(SplMinHeap, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(SplMaxHeap, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(SplObjectStorage, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(SplObserver, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(SplPriorityQueue, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(SplQueue, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(SplStack, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(SplSubject, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(SplTempFileObject, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(UnderflowException, z_list, sub, allow, ce_flags); \
	SPL_ADD_CLASS(UnexpectedValueException, z_list, sub, allow, ce_flags); \

/* {{{ proto array spl_classes()
 Return an array containing the names of all clsses and interfaces defined in SPL */
PHP_FUNCTION(spl_classes)
{
	array_init(return_value);
	
	SPL_LIST_CLASSES(return_value, 0, 0, 0)
}
/* }}} */

static int spl_autoload(const char *class_name, const char * lc_name, int class_name_len, const char * file_extension TSRMLS_DC) /* {{{ */
{
	char *class_file;
	int class_file_len;
	int dummy = 1;
	zend_file_handle file_handle;
	zend_op_array *new_op_array;
	zval *result = NULL;
	int ret;

	class_file_len = spprintf(&class_file, 0, "%s%s", lc_name, file_extension);

	ret = php_stream_open_for_zend_ex(class_file, &file_handle, ENFORCE_SAFE_MODE|USE_PATH|STREAM_OPEN_FOR_INCLUDE TSRMLS_CC);

	if (ret == SUCCESS) {
		if (!file_handle.opened_path) {
			file_handle.opened_path = estrndup(class_file, class_file_len);
		}
		if (zend_hash_add(&EG(included_files), file_handle.opened_path, strlen(file_handle.opened_path)+1, (void *)&dummy, sizeof(int), NULL)==SUCCESS) {
			new_op_array = zend_compile_file(&file_handle, ZEND_REQUIRE TSRMLS_CC);
			zend_destroy_file_handle(&file_handle TSRMLS_CC);
		} else {
			new_op_array = NULL;
			zend_file_handle_dtor(&file_handle TSRMLS_CC);
		}
		if (new_op_array) {
			EG(return_value_ptr_ptr) = &result;
			EG(active_op_array) = new_op_array;
			if (!EG(active_symbol_table)) {
				zend_rebuild_symbol_table(TSRMLS_C);
			}

			zend_execute(new_op_array TSRMLS_CC);
	
			destroy_op_array(new_op_array TSRMLS_CC);
			efree(new_op_array);
			if (!EG(exception)) {
				if (EG(return_value_ptr_ptr)) {
					zval_ptr_dtor(EG(return_value_ptr_ptr));
				}
			}

			efree(class_file);
			return zend_hash_exists(EG(class_table), (char*)lc_name, class_name_len+1);
		}
	}
	efree(class_file);
	return 0;
} /* }}} */

/* {{{ proto void spl_autoload(string class_name [, string file_extensions])
 Default implementation for __autoload() */
PHP_FUNCTION(spl_autoload)
{
	char *class_name, *lc_name, *file_exts = SPL_G(autoload_extensions);
	int class_name_len, file_exts_len = SPL_G(autoload_extensions_len), found = 0;
	char *copy, *pos1, *pos2;
	zval **original_return_value = EG(return_value_ptr_ptr);
	zend_op **original_opline_ptr = EG(opline_ptr);
	zend_op_array *original_active_op_array = EG(active_op_array);
	
	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|s", &class_name, &class_name_len, &file_exts, &file_exts_len) == FAILURE) {
		RETURN_FALSE;
	}

	if (file_exts == NULL) { /* autoload_extensions is not intialzed, set to defaults */
		copy = pos1 = estrndup(SPL_DEFAULT_FILE_EXTENSIONS, sizeof(SPL_DEFAULT_FILE_EXTENSIONS)-1);
	} else {
		copy = pos1 = estrndup(file_exts, file_exts_len);
	}
	lc_name = zend_str_tolower_dup(class_name, class_name_len);
	while(pos1 && *pos1 && !EG(exception)) {
		EG(return_value_ptr_ptr) = original_return_value;
		EG(opline_ptr) = original_opline_ptr;
		EG(active_op_array) = original_active_op_array;
		pos2 = strchr(pos1, ',');
		if (pos2) *pos2 = '\0';
		if (spl_autoload(class_name, lc_name, class_name_len, pos1 TSRMLS_CC)) {
			found = 1;
			break; /* loaded */
		}
		pos1 = pos2 ? pos2 + 1 : NULL;
	}
	efree(lc_name);
	if (copy) {
		efree(copy);
	}

	EG(return_value_ptr_ptr) = original_return_value;
	EG(opline_ptr) = original_opline_ptr;
	EG(active_op_array) = original_active_op_array;

	if (!found && !SPL_G(autoload_running)) {
		/* For internal errors, we generate E_ERROR, for direct calls an exception is thrown.
		 * The "scope" is determined by an opcode, if it is ZEND_FETCH_CLASS we know function was called indirectly by
		 * the Zend engine.
		 */
		if (active_opline->opcode != ZEND_FETCH_CLASS) {
			zend_throw_exception_ex(spl_ce_LogicException, 0 TSRMLS_CC, "Class %s could not be loaded", class_name);
		} else {
			php_error_docref(NULL TSRMLS_CC, E_ERROR, "Class %s could not be loaded", class_name);
		}
	}
} /* }}} */

/* {{{ proto string spl_autoload_extensions([string file_extensions])
 Register and return default file extensions for spl_autoload */
PHP_FUNCTION(spl_autoload_extensions)
{
	char *file_exts;
	int file_exts_len;

	if (ZEND_NUM_ARGS() > 0) {
		if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &file_exts, &file_exts_len) == FAILURE) {
			return;
		}
	
		if (SPL_G(autoload_extensions)) {
			efree(SPL_G(autoload_extensions));
		}
		SPL_G(autoload_extensions) = estrndup(file_exts, file_exts_len);
		SPL_G(autoload_extensions_len) = file_exts_len;
	}

	if (SPL_G(autoload_extensions) == NULL) {
		RETURN_STRINGL(SPL_DEFAULT_FILE_EXTENSIONS, sizeof(SPL_DEFAULT_FILE_EXTENSIONS) - 1, 1);
	} else {
		RETURN_STRINGL(SPL_G(autoload_extensions), SPL_G(autoload_extensions_len), 1);
	}
} /* }}} */

typedef struct {
	zend_function *func_ptr;
	zval *obj;
	zend_class_entry *ce;
} autoload_func_info;

static void autoload_func_info_dtor(autoload_func_info *alfi)
{
	if (alfi->obj) {
		zval_ptr_dtor(&alfi->obj);
	}
}

/* {{{ proto void spl_autoload_call(string class_name)
 Try all registerd autoload function to load the requested class */
PHP_FUNCTION(spl_autoload_call)
{
	zval *class_name, *retval = NULL;
	int class_name_len;
	char *func_name, *lc_name;
	uint func_name_len;
	ulong dummy;
	HashPosition function_pos;
	autoload_func_info *alfi;

	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &class_name) == FAILURE || Z_TYPE_P(class_name) != IS_STRING) {
		return;
	}

	if (SPL_G(autoload_functions)) {
		int l_autoload_running = SPL_G(autoload_running);
		SPL_G(autoload_running) = 1;
		class_name_len = Z_STRLEN_P(class_name);
		lc_name = zend_str_tolower_dup(Z_STRVAL_P(class_name), class_name_len);
		zend_hash_internal_pointer_reset_ex(SPL_G(autoload_functions), &function_pos);
		while(zend_hash_has_more_elements_ex(SPL_G(autoload_functions), &function_pos) == SUCCESS) {
			zend_hash_get_current_key_ex(SPL_G(autoload_functions), &func_name, &func_name_len, &dummy, 0, &function_pos);
			zend_hash_get_current_data_ex(SPL_G(autoload_functions), (void **) &alfi, &function_pos);
			zend_call_method(alfi->obj ? &alfi->obj : NULL, alfi->ce, &alfi->func_ptr, func_name, func_name_len, &retval, 1, class_name, NULL TSRMLS_CC);
			zend_exception_save(TSRMLS_C);
			if (retval) {
				zval_ptr_dtor(&retval);
			}
			if (zend_hash_exists(EG(class_table), lc_name, class_name_len + 1)) {
				break;
			}
			zend_hash_move_forward_ex(SPL_G(autoload_functions), &function_pos);
		}
		zend_exception_restore(TSRMLS_C);
		efree(lc_name);
		SPL_G(autoload_running) = l_autoload_running;
	} else {
		/* do not use or overwrite &EG(autoload_func) here */
		zend_call_method_with_1_params(NULL, NULL, NULL, "spl_autoload", NULL, class_name);
	}
} /* }}} */

#define HT_MOVE_TAIL_TO_HEAD(ht)							\
	(ht)->pListTail->pListNext = (ht)->pListHead;			\
	(ht)->pListHead = (ht)->pListTail;						\
	(ht)->pListTail = (ht)->pListHead->pListLast;			\
	(ht)->pListTail->pListNext = NULL;						\
	(ht)->pListHead->pListLast = NULL;

/* {{{ proto bool spl_autoload_register([mixed autoload_function = "spl_autoload" [, throw = true [, prepend]]])
 Register given function as __autoload() implementation */
PHP_FUNCTION(spl_autoload_register)
{
	char *func_name, *error = NULL;
	int  func_name_len;
	char *lc_name = NULL;
	zval *zcallable = NULL;
	zend_bool do_throw = 1;
	zend_bool prepend  = 0;
	zend_function *spl_func_ptr;
	autoload_func_info alfi;
	zval *obj_ptr;
	zend_fcall_info_cache fcc;

	if (zend_parse_parameters_ex(ZEND_PARSE_PARAMS_QUIET, ZEND_NUM_ARGS() TSRMLS_CC, "|zbb", &zcallable, &do_throw, &prepend) == FAILURE) {
		return;
	}

	if (ZEND_NUM_ARGS()) {
		if (Z_TYPE_P(zcallable) == IS_STRING) {
			if (Z_STRLEN_P(zcallable) == sizeof("spl_autoload_call") - 1) {
				if (!zend_binary_strcasecmp(Z_STRVAL_P(zcallable), sizeof("spl_autoload_call"), "spl_autoload_call", sizeof("spl_autoload_call"))) {
					if (do_throw) {
						zend_throw_exception_ex(spl_ce_LogicException, 0 TSRMLS_CC, "Function spl_autoload_call() cannot be registered");
					}
					RETURN_FALSE;
				}
			}
		}
	
		if (!zend_is_callable_ex(zcallable, NULL, IS_CALLABLE_STRICT, &func_name, &func_name_len, &fcc, &error TSRMLS_CC)) {
			alfi.ce = fcc.calling_scope;
			alfi.func_ptr = fcc.function_handler;
			obj_ptr = fcc.object_ptr;
			if (Z_TYPE_P(zcallable) == IS_ARRAY) {
				if (!obj_ptr && alfi.func_ptr && !(alfi.func_ptr->common.fn_flags & ZEND_ACC_STATIC)) {
					if (do_throw) {
						zend_throw_exception_ex(spl_ce_LogicException, 0 TSRMLS_CC, "Passed array specifies a non static method but no object (%s)", error);
					}
					if (error) {
						efree(error);
					}
					efree(func_name);
					RETURN_FALSE;
				}
				else if (do_throw) {
					zend_throw_exception_ex(spl_ce_LogicException, 0 TSRMLS_CC, "Passed array does not specify %s %smethod (%s)", alfi.func_ptr ? "a callable" : "an existing", !obj_ptr ? "static " : "", error);
				}
				if (error) {
					efree(error);
				}
				efree(func_name);
				RETURN_FALSE;
			} else if (Z_TYPE_P(zcallable) == IS_STRING) {
				if (do_throw) {
					zend_throw_exception_ex(spl_ce_LogicException, 0 TSRMLS_CC, "Function '%s' not %s (%s)", func_name, alfi.func_ptr ? "callable" : "found", error);
				}
				if (error) {
					efree(error);
				}
				efree(func_name);
				RETURN_FALSE;
			} else {
				if (do_throw) {
					zend_throw_exception_ex(spl_ce_LogicException, 0 TSRMLS_CC, "Illegal value passed (%s)", error);
				}
				if (error) {
					efree(error);
				}
				efree(func_name);
				RETURN_FALSE;
			}
		}
		alfi.ce = fcc.calling_scope;
		alfi.func_ptr = fcc.function_handler;
		obj_ptr = fcc.object_ptr;
		if (error) {
			efree(error);
		}
	
		lc_name = safe_emalloc(func_name_len, 1, sizeof(long) + 1);
		zend_str_tolower_copy(lc_name, func_name, func_name_len);
		efree(func_name);

		if (SPL_G(autoload_functions) && zend_hash_exists(SPL_G(autoload_functions), (char*)lc_name, func_name_len+1)) {
			goto skip;
		}

		if (obj_ptr && !(alfi.func_ptr->common.fn_flags & ZEND_ACC_STATIC)) {
			/* add object id to the hash to ensure uniqueness, for more reference look at bug #40091 */
			memcpy(lc_name + func_name_len, &Z_OBJ_HANDLE_P(obj_ptr), sizeof(zend_object_handle));
			func_name_len += sizeof(zend_object_handle);
			lc_name[func_name_len] = '\0';
			alfi.obj = obj_ptr;
			Z_ADDREF_P(alfi.obj);
		} else {
			alfi.obj = NULL;
		}

		if (!SPL_G(autoload_functions)) {
			ALLOC_HASHTABLE(SPL_G(autoload_functions));
			zend_hash_init(SPL_G(autoload_functions), 1, NULL, (dtor_func_t) autoload_func_info_dtor, 0);
		}

		zend_hash_find(EG(function_table), "spl_autoload", sizeof("spl_autoload"), (void **) &spl_func_ptr);

		if (EG(autoload_func) == spl_func_ptr) { /* registered already, so we insert that first */
			autoload_func_info spl_alfi;

			spl_alfi.func_ptr = spl_func_ptr;
			spl_alfi.obj = NULL;
			spl_alfi.ce = NULL;
			zend_hash_add(SPL_G(autoload_functions), "spl_autoload", sizeof("spl_autoload"), &spl_alfi, sizeof(autoload_func_info), NULL);
			if (prepend && SPL_G(autoload_functions)->nNumOfElements > 1) {
				/* Move the newly created element to the head of the hashtable */
				HT_MOVE_TAIL_TO_HEAD(SPL_G(autoload_functions));
			}
		}

		zend_hash_add(SPL_G(autoload_functions), lc_name, func_name_len+1, &alfi.func_ptr, sizeof(autoload_func_info), NULL);
		if (prepend && SPL_G(autoload_functions)->nNumOfElements > 1) {
			/* Move the newly created element to the head of the hashtable */
			HT_MOVE_TAIL_TO_HEAD(SPL_G(autoload_functions));
		}
skip:
		efree(lc_name);
	}

	if (SPL_G(autoload_functions)) {
		zend_hash_find(EG(function_table), "spl_autoload_call", sizeof("spl_autoload_call"), (void **) &EG(autoload_func));
	} else {
		zend_hash_find(EG(function_table), "spl_autoload", sizeof("spl_autoload"), (void **) &EG(autoload_func));
	}
	RETURN_TRUE;
} /* }}} */

/* {{{ proto bool spl_autoload_unregister(mixed autoload_function)
 Unregister given function as __autoload() implementation */
PHP_FUNCTION(spl_autoload_unregister)
{
	char *func_name, *error = NULL;
	int func_name_len;
	zval *zcallable;
	int success = FAILURE;
	zend_function *spl_func_ptr;
	zval *obj_ptr;
	zend_fcall_info_cache fcc;

	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &zcallable) == FAILURE) {
		return;
	}

	if (!zend_is_callable_ex(zcallable, NULL, IS_CALLABLE_CHECK_SYNTAX_ONLY, &func_name, &func_name_len, &fcc, &error TSRMLS_CC)) {
		zend_throw_exception_ex(spl_ce_LogicException, 0 TSRMLS_CC, "Unable to unregister invalid function (%s)", error);
		if (error) {
			efree(error);
		}
		if (func_name) {
			efree(func_name);
		}
		RETURN_FALSE;
	}
	obj_ptr = fcc.object_ptr;
	if (error) {
		efree(error);
	}

	zend_str_tolower(func_name, func_name_len);

	if (SPL_G(autoload_functions)) {
		if (func_name_len == sizeof("spl_autoload_call")-1 && !strcmp(func_name, "spl_autoload_call")) {
			/* remove all */
			zend_hash_destroy(SPL_G(autoload_functions));
			FREE_HASHTABLE(SPL_G(autoload_functions));
			SPL_G(autoload_functions) = NULL;
			EG(autoload_func) = NULL;
			success = SUCCESS;
		} else {
			/* remove specific */
			success = zend_hash_del(SPL_G(autoload_functions), func_name, func_name_len+1);
			if (success != SUCCESS && obj_ptr) {
				func_name = erealloc(func_name, func_name_len + 1 + sizeof(zend_object_handle));
				memcpy(func_name + func_name_len, &Z_OBJ_HANDLE_P(obj_ptr), sizeof(zend_object_handle));
				func_name_len += sizeof(zend_object_handle);
				func_name[func_name_len] = '\0';
				success = zend_hash_del(SPL_G(autoload_functions), func_name, func_name_len+1);
			}
		}
	} else if (func_name_len == sizeof("spl_autoload")-1 && !strcmp(func_name, "spl_autoload")) {
		/* register single spl_autoload() */
		zend_hash_find(EG(function_table), "spl_autoload", sizeof("spl_autoload"), (void **) &spl_func_ptr);

		if (EG(autoload_func) == spl_func_ptr) {
			success = SUCCESS;
			EG(autoload_func) = NULL;
		}
	}

	efree(func_name);
	RETURN_BOOL(success == SUCCESS);
} /* }}} */

/* {{{ proto false|array spl_autoload_functions()
 Return all registered __autoload() functionns */
PHP_FUNCTION(spl_autoload_functions)
{
	zend_function *fptr;
	HashPosition function_pos;
	autoload_func_info *alfi;

	if (!EG(autoload_func)) {
		if (zend_hash_find(EG(function_table), ZEND_AUTOLOAD_FUNC_NAME, sizeof(ZEND_AUTOLOAD_FUNC_NAME), (void **) &fptr) == SUCCESS) {
			array_init(return_value);
			add_next_index_stringl(return_value, ZEND_AUTOLOAD_FUNC_NAME, sizeof(ZEND_AUTOLOAD_FUNC_NAME)-1, 1);
			return;
		}
		RETURN_FALSE;
	}

	zend_hash_find(EG(function_table), "spl_autoload_call", sizeof("spl_autoload_call"), (void **) &fptr);

	if (EG(autoload_func) == fptr) {
		array_init(return_value);
		zend_hash_internal_pointer_reset_ex(SPL_G(autoload_functions), &function_pos);
		while(zend_hash_has_more_elements_ex(SPL_G(autoload_functions), &function_pos) == SUCCESS) {
			zend_hash_get_current_data_ex(SPL_G(autoload_functions), (void **) &alfi, &function_pos);
			if (alfi->func_ptr->common.scope) {
				zval *tmp;
				MAKE_STD_ZVAL(tmp);
				array_init(tmp);

				if (alfi->obj) {
					Z_ADDREF_P(alfi->obj);
					add_next_index_zval(tmp, alfi->obj);
				} else {
					add_next_index_string(tmp, alfi->ce->name, 1);
				}
				add_next_index_string(tmp, alfi->func_ptr->common.function_name, 1);
				add_next_index_zval(return_value, tmp);
			} else
				add_next_index_string(return_value, alfi->func_ptr->common.function_name, 1);

			zend_hash_move_forward_ex(SPL_G(autoload_functions), &function_pos);
		}
		return;
	}

	array_init(return_value);
	add_next_index_string(return_value, EG(autoload_func)->common.function_name, 1);
} /* }}} */

/* {{{ proto string spl_object_hash(object obj)
 Return hash id for given object */
PHP_FUNCTION(spl_object_hash)
{
	zval *obj;
	char* md5str;

	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "o", &obj) == FAILURE) {
		return;
	}
	
	md5str = emalloc(33);
	php_spl_object_hash(obj, md5str TSRMLS_CC);
	
	RETVAL_STRING(md5str, 0);
}
/* }}} */

PHPAPI void php_spl_object_hash(zval *obj, char *md5str TSRMLS_DC) /* {{{*/
{
	int len;
	char *hash;
	PHP_MD5_CTX context;
	unsigned char digest[16];

	len = spprintf(&hash, 0, "%p:%d", Z_OBJ_HT_P(obj), Z_OBJ_HANDLE_P(obj));

	md5str[0] = '\0';
	PHP_MD5Init(&context);
	PHP_MD5Update(&context, (unsigned char*)hash, len);
	PHP_MD5Final(digest, &context);
	make_digest(md5str, digest);
	efree(hash);
}
/* }}} */

int spl_build_class_list_string(zval **entry, char **list TSRMLS_DC) /* {{{ */
{
	char *res;
	
	spprintf(&res, 0, "%s, %s", *list, Z_STRVAL_PP(entry));
	efree(*list);
	*list = res;
	return ZEND_HASH_APPLY_KEEP;
} /* }}} */

/* {{{ PHP_MINFO(spl)
 */
PHP_MINFO_FUNCTION(spl)
{
	zval list;
	char *strg;

	php_info_print_table_start();
	php_info_print_table_header(2, "SPL support",        "enabled");

	INIT_PZVAL(&list);
	array_init(&list);
	SPL_LIST_CLASSES(&list, 0, 1, ZEND_ACC_INTERFACE)
	strg = estrdup("");
	zend_hash_apply_with_argument(Z_ARRVAL_P(&list), (apply_func_arg_t)spl_build_class_list_string, &strg TSRMLS_CC);
	zval_dtor(&list);
	php_info_print_table_row(2, "Interfaces", strg + 2);
	efree(strg);

	INIT_PZVAL(&list);
	array_init(&list);
	SPL_LIST_CLASSES(&list, 0, -1, ZEND_ACC_INTERFACE)
	strg = estrdup("");
	zend_hash_apply_with_argument(Z_ARRVAL_P(&list), (apply_func_arg_t)spl_build_class_list_string, &strg TSRMLS_CC);
	zval_dtor(&list);
	php_info_print_table_row(2, "Classes", strg + 2);
	efree(strg);

	php_info_print_table_end();
}
/* }}} */

/* {{{ arginfo */
ZEND_BEGIN_ARG_INFO_EX(arginfo_iterator_to_array, 0, 0, 1)
	ZEND_ARG_OBJ_INFO(0, iterator, Traversable, 0)
	ZEND_ARG_INFO(0, use_keys)
ZEND_END_ARG_INFO();

ZEND_BEGIN_ARG_INFO(arginfo_iterator, 0)
	ZEND_ARG_OBJ_INFO(0, iterator, Traversable, 0)
ZEND_END_ARG_INFO();

ZEND_BEGIN_ARG_INFO_EX(arginfo_iterator_apply, 0, 0, 2)
	ZEND_ARG_OBJ_INFO(0, iterator, Traversable, 0)
	ZEND_ARG_INFO(0, function)
	ZEND_ARG_ARRAY_INFO(0, args, 1)
ZEND_END_ARG_INFO();

ZEND_BEGIN_ARG_INFO_EX(arginfo_class_parents, 0, 0, 1)
	ZEND_ARG_INFO(0, instance)
ZEND_END_ARG_INFO()

ZEND_BEGIN_ARG_INFO_EX(arginfo_class_implements, 0, 0, 1)
	ZEND_ARG_INFO(0, what)
	ZEND_ARG_INFO(0, autoload)
ZEND_END_ARG_INFO()

ZEND_BEGIN_ARG_INFO(arginfo_spl_classes, 0)
ZEND_END_ARG_INFO()

ZEND_BEGIN_ARG_INFO(arginfo_spl_autoload_functions, 0)
ZEND_END_ARG_INFO()

ZEND_BEGIN_ARG_INFO_EX(arginfo_spl_autoload, 0, 0, 1)
	ZEND_ARG_INFO(0, class_name)
	ZEND_ARG_INFO(0, file_extensions)
ZEND_END_ARG_INFO()

ZEND_BEGIN_ARG_INFO_EX(arginfo_spl_autoload_extensions, 0, 0, 0)
	ZEND_ARG_INFO(0, file_extensions)
ZEND_END_ARG_INFO()

ZEND_BEGIN_ARG_INFO_EX(arginfo_spl_autoload_call, 0, 0, 1)
	ZEND_ARG_INFO(0, class_name)
ZEND_END_ARG_INFO()

ZEND_BEGIN_ARG_INFO_EX(arginfo_spl_autoload_register, 0, 0, 0)
	ZEND_ARG_INFO(0, autoload_function)
ZEND_END_ARG_INFO()

ZEND_BEGIN_ARG_INFO_EX(arginfo_spl_autoload_unregister, 0, 0, 1)
	ZEND_ARG_INFO(0, autoload_function)
ZEND_END_ARG_INFO()

ZEND_BEGIN_ARG_INFO_EX(arginfo_spl_object_hash, 0, 0, 1)
	ZEND_ARG_INFO(0, obj)
ZEND_END_ARG_INFO()
/* }}} */

/* {{{ spl_functions
 */
const zend_function_entry spl_functions[] = {
	PHP_FE(spl_classes,             arginfo_spl_classes)
	PHP_FE(spl_autoload,            arginfo_spl_autoload)
	PHP_FE(spl_autoload_extensions, arginfo_spl_autoload_extensions)
	PHP_FE(spl_autoload_register,   arginfo_spl_autoload_register)
	PHP_FE(spl_autoload_unregister, arginfo_spl_autoload_unregister)
	PHP_FE(spl_autoload_functions,  arginfo_spl_autoload_functions)
	PHP_FE(spl_autoload_call,       arginfo_spl_autoload_call)
	PHP_FE(class_parents,           arginfo_class_parents)
	PHP_FE(class_implements,        arginfo_class_implements)
	PHP_FE(spl_object_hash,         arginfo_spl_object_hash)
#ifdef SPL_ITERATORS_H
	PHP_FE(iterator_to_array,       arginfo_iterator_to_array)
	PHP_FE(iterator_count,          arginfo_iterator)
	PHP_FE(iterator_apply,          arginfo_iterator_apply)
#endif /* SPL_ITERATORS_H */
	{NULL, NULL, NULL}
};
/* }}} */

/* {{{ PHP_MINIT_FUNCTION(spl)
 */
PHP_MINIT_FUNCTION(spl)
{
	PHP_MINIT(spl_exceptions)(INIT_FUNC_ARGS_PASSTHRU);
	PHP_MINIT(spl_iterators)(INIT_FUNC_ARGS_PASSTHRU);
	PHP_MINIT(spl_array)(INIT_FUNC_ARGS_PASSTHRU);
	PHP_MINIT(spl_directory)(INIT_FUNC_ARGS_PASSTHRU);
	PHP_MINIT(spl_dllist)(INIT_FUNC_ARGS_PASSTHRU);
	PHP_MINIT(spl_heap)(INIT_FUNC_ARGS_PASSTHRU);
	PHP_MINIT(spl_fixedarray)(INIT_FUNC_ARGS_PASSTHRU);
	PHP_MINIT(spl_observer)(INIT_FUNC_ARGS_PASSTHRU);

	return SUCCESS;
}
/* }}} */

PHP_RINIT_FUNCTION(spl) /* {{{ */
{
	SPL_G(autoload_extensions) = NULL;
	SPL_G(autoload_extensions_len) = 0;
	SPL_G(autoload_functions) = NULL;
	return SUCCESS;
} /* }}} */

PHP_RSHUTDOWN_FUNCTION(spl) /* {{{ */
{
	if (SPL_G(autoload_extensions)) {
		efree(SPL_G(autoload_extensions));
		SPL_G(autoload_extensions) = NULL;
		SPL_G(autoload_extensions_len) = 0;
	}
	if (SPL_G(autoload_functions)) {
		zend_hash_destroy(SPL_G(autoload_functions));
		FREE_HASHTABLE(SPL_G(autoload_functions));
		SPL_G(autoload_functions) = NULL;
	}
	return SUCCESS;
} /* }}} */

/* {{{ spl_module_entry
 */
zend_module_entry spl_module_entry = {
	STANDARD_MODULE_HEADER,
	"SPL",
	spl_functions,
	PHP_MINIT(spl),
	NULL,
	PHP_RINIT(spl),
	PHP_RSHUTDOWN(spl),
	PHP_MINFO(spl),
	"0.2",
	PHP_MODULE_GLOBALS(spl),
	PHP_GINIT(spl),
	NULL,
	NULL,
	STANDARD_MODULE_PROPERTIES_EX
};
/* }}} */

/*
 * Local variables:
 * tab-width: 4
 * c-basic-offset: 4
 * End:
 * vim600: fdm=marker
 * vim: noet sw=4 ts=4
 */