runkit_classes.c

/*
  +----------------------------------------------------------------------+
  | PHP Version 5                                                        |
  +----------------------------------------------------------------------+
  | Copyright (c) 1997-2006 The PHP Group, (c) 2008-2012 Dmitry Zenovich |
  +----------------------------------------------------------------------+
  | This source file is subject to the new BSD 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.opensource.org/licenses/BSD-3-Clause                      |
  | If you did not receive a copy of the 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.               |
  +----------------------------------------------------------------------+
  | Author: Sara Golemon <pollita@php.net>                               |
  | Modified by Dmitry Zenovich <dzenovich@gmail.com>                    |
  +----------------------------------------------------------------------+
*/

/* $Id$ */

#include "php_runkit.h"

#ifdef PHP_RUNKIT_MANIPULATION
/* {{{ php_runkit_remove_inherited_methods */
static int php_runkit_remove_inherited_methods(zend_function *fe, zend_class_entry *ce TSRMLS_DC)
{
	const char *function_name = fe->common.function_name;
	int function_name_len = strlen(function_name);
	char *fname_lower;
	zend_class_entry *ancestor_class;

	fname_lower = estrndup(function_name, function_name_len);
	if (fname_lower == NULL) {
		php_error_docref(NULL TSRMLS_CC, E_ERROR, "Not enough memory");
		return ZEND_HASH_APPLY_KEEP;
	}
	php_strtolower(fname_lower, function_name_len);

	ancestor_class = php_runkit_locate_scope(ce, fe, fname_lower, function_name_len);

	if (ancestor_class == ce) {
		efree(fname_lower);
		return ZEND_HASH_APPLY_KEEP;
	}

	zend_hash_apply_with_arguments(RUNKIT_53_TSRMLS_PARAM(EG(class_table)), (apply_func_args_t)php_runkit_clean_children_methods, 5,
	                               ancestor_class, ce, fname_lower, function_name_len, fe);
	PHP_RUNKIT_DEL_MAGIC_METHOD(ce, fe);
#ifdef ZEND_ENGINE_2
	php_runkit_remove_function_from_reflection_objects(fe TSRMLS_CC);
#endif

	efree(fname_lower);
	return ZEND_HASH_APPLY_REMOVE;
}
/* }}} */

/* {{{ proto bool runkit_class_emancipate(string classname)
	Convert an inherited class to a base class, removes any method whose scope is ancestral */
PHP_FUNCTION(runkit_class_emancipate)
{
	zend_class_entry *ce;
	char *classname;
	int classname_len;

	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s/", &classname, &classname_len) == FAILURE) {
		RETURN_FALSE;
	}

	if (php_runkit_fetch_class(classname, classname_len, &ce TSRMLS_CC) == FAILURE) {
		RETURN_FALSE;
	}

	if (!ce->parent) {
		php_error_docref(NULL TSRMLS_CC, E_NOTICE, "Class %s has no parent to emancipate from", classname);
		RETURN_TRUE;
	}

#if (PHP_MAJOR_VERSION == 5 && PHP_MINOR_VERSION >= 4) || (PHP_MAJOR_VERSION > 5)
	php_runkit_clear_all_functions_runtime_cache(TSRMLS_C);
#endif

	zend_hash_apply_with_argument(&ce->function_table, (apply_func_arg_t)php_runkit_remove_inherited_methods, ce TSRMLS_CC);
	ce->parent = NULL;

	RETURN_TRUE;
}
/* }}} */

/* {{{ php_runkit_inherit_methods
	Inherit methods from a new ancestor */
static int php_runkit_inherit_methods(zend_function *fe, zend_class_entry *ce TSRMLS_DC)
{
	const char *function_name = fe->common.function_name;
	char *lower_function_name;
	int function_name_len = strlen(function_name);
	zend_class_entry *ancestor_class;

	/* method name keys must be lower case */
	lower_function_name = estrndup(function_name, function_name_len);
	if (lower_function_name == NULL) {
		php_error_docref(NULL TSRMLS_CC, E_ERROR, "Not enough memory");
		return ZEND_HASH_APPLY_KEEP;
	}
	php_strtolower(lower_function_name, function_name_len);

	if (zend_hash_exists(&ce->function_table, (char *) lower_function_name, function_name_len + 1)) {
		efree(lower_function_name);
		return ZEND_HASH_APPLY_KEEP;
	}

	ancestor_class = php_runkit_locate_scope(ce, fe, lower_function_name, function_name_len);

#if PHP_MAJOR_VERSION < 5
	zend_hash_apply_with_arguments(RUNKIT_53_TSRMLS_PARAM(EG(class_table)), (apply_func_args_t)php_runkit_update_children_methods, 7,
	                               ancestor_class, ce, fe, lower_function_name, function_name_len, NULL,
	                               ce->name_length == function_name_len && !strncmp(ce->name, lower_function_name, ce->name_length));
#endif

	if (zend_hash_add_or_update(&ce->function_table, lower_function_name, function_name_len + 1, fe, sizeof(zend_function), NULL, HASH_ADD) == FAILURE) {
		php_error_docref(NULL TSRMLS_CC, E_WARNING, "Error inheriting parent method: %s()", fe->common.function_name);
		efree(lower_function_name);
		return ZEND_HASH_APPLY_KEEP;
	}

	if (zend_hash_find(&ce->function_table, lower_function_name, function_name_len + 1, (void*)&fe) == FAILURE ||
	    !fe) {
		php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unable to locate newly added method");
		efree(lower_function_name);
		return ZEND_HASH_APPLY_KEEP;
	}

	PHP_RUNKIT_FUNCTION_ADD_REF(fe);
	PHP_RUNKIT_ADD_MAGIC_METHOD(ce, lower_function_name, function_name_len, fe, NULL);

#if PHP_MAJOR_VERSION >= 5
	zend_hash_apply_with_arguments(RUNKIT_53_TSRMLS_PARAM(EG(class_table)), (apply_func_args_t)php_runkit_update_children_methods, 6,
	                               ancestor_class, ce, fe, lower_function_name, function_name_len, NULL);
#endif
	efree(lower_function_name);

	return ZEND_HASH_APPLY_KEEP;
}
/* }}} */

/* {{{ php_runkit_class_copy
       Copy class into class table */
int php_runkit_class_copy(zend_class_entry *src, const char *classname, int classname_len TSRMLS_DC)
{
	zend_class_entry *new_class_entry;
	char *lcname;
	lcname = estrndup(classname, classname_len);
	php_strtolower(lcname, classname_len);

	new_class_entry = emalloc(sizeof(zend_class_entry));
	new_class_entry->parent = NULL;
	if (src->parent && src->parent->name) {
		php_runkit_fetch_class_int(src->parent->name, src->parent->name_length, &new_class_entry->parent TSRMLS_CC);
	}
#ifndef ZEND_ENGINE_2
	new_class_entry->type = ZEND_USER_CLASS;
	new_class_entry->name = estrdup(classname);
	new_class_entry->name_length = classname_len;
	new_class_entry->refcount = (int *) emalloc(sizeof(int));
	*(new_class_entry->refcount) = 0;
	new_class_entry->constants_updated = 0;

	zend_hash_init(&new_class_entry->function_table, 10, NULL, ZEND_FUNCTION_DTOR, 0);
	zend_hash_init(&new_class_entry->default_properties, 10, NULL, ZVAL_PTR_DTOR, 0);

	new_class_entry->handle_function_call = src->handle_function_call;
	new_class_entry->handle_property_set = src->handle_property_set;
	new_class_entry->handle_property_get = src->handle_property_get;

	zend_hash_update(EG(class_table), lcname, classname_len+1, new_class_entry, sizeof(zend_class_entry), NULL);
	efree(new_class_entry);
#else
	new_class_entry->type = ZEND_USER_CLASS;
	new_class_entry->name = estrndup(classname, classname_len);
	new_class_entry->name_length = classname_len;

	zend_initialize_class_data(new_class_entry, 1 TSRMLS_CC);
#if (PHP_MAJOR_VERSION == 5 && PHP_MINOR_VERSION >= 4) || (PHP_MAJOR_VERSION > 5)
	new_class_entry->info.user.filename = src->info.user.filename;
	new_class_entry->info.user.line_start = src->info.user.line_start;
	new_class_entry->info.user.doc_comment = src->info.user.doc_comment;
	new_class_entry->info.user.doc_comment_len = src->info.user.doc_comment_len;
	new_class_entry->info.user.line_end = src->info.user.line_end;
	new_class_entry->num_traits = src->num_traits;
	new_class_entry->traits = src->traits;
#else
	new_class_entry->filename = src->filename;
	new_class_entry->line_start = src->line_start;
	new_class_entry->doc_comment = src->doc_comment;
	new_class_entry->doc_comment_len = src->doc_comment_len;
	new_class_entry->line_end = src->line_end;
#endif
	new_class_entry->ce_flags = src->ce_flags;

	zend_hash_update(EG(class_table), lcname, classname_len + 1, &new_class_entry, sizeof(zend_class_entry *), NULL);

	new_class_entry->num_interfaces = src->num_interfaces;
#endif
	efree(lcname);
	return SUCCESS;
}
/* }}} */

/* {{{ proto bool runkit_class_adopt(string classname, string parentname)
	Convert a base class to an inherited class, add ancestral methods when appropriate */
PHP_FUNCTION(runkit_class_adopt)
{
	zend_class_entry *ce, *parent;
	char *classname, *parentname;
	int classname_len, parentname_len;

	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s/s/", &classname, &classname_len, &parentname, &parentname_len) == FAILURE) {
		RETURN_FALSE;
	}

	if (php_runkit_fetch_class(classname, classname_len, &ce TSRMLS_CC) == FAILURE) {
		RETURN_FALSE;
	}

	if (ce->parent) {
		php_error_docref(NULL TSRMLS_CC, E_WARNING, "Class %s already has a parent", classname);
		RETURN_FALSE;
	}

	if (php_runkit_fetch_class(parentname, parentname_len, &parent TSRMLS_CC) == FAILURE) {
		RETURN_FALSE;
	}

	ce->parent = parent;

#if (PHP_MAJOR_VERSION == 5 && PHP_MINOR_VERSION >= 4) || (PHP_MAJOR_VERSION > 5)
	php_runkit_clear_all_functions_runtime_cache(TSRMLS_C);
#endif

	zend_hash_apply_with_argument(&parent->function_table, (apply_func_arg_t)php_runkit_inherit_methods, ce TSRMLS_CC);

	RETURN_TRUE;
}
/* }}} */

#endif /* PHP_RUNKIT_MANIPULATION */

#ifdef ZEND_ENGINE_2
/* {{{ proto int runkit_object_id(object instance)
Fetch the Object Handle ID from an instance */
PHP_FUNCTION(runkit_object_id)
{
	zval *obj;

	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "o", &obj) == FAILURE) {
		RETURN_NULL();
	}

	RETURN_LONG(Z_OBJ_HANDLE_P(obj));
}
/* }}} */
#endif /* ZEND_ENGINE_2 */
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