mirror of
https://github.com/php/php-src.git
synced 2024-12-03 23:05:57 +08:00
445 lines
13 KiB
C
445 lines
13 KiB
C
/*
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+----------------------------------------------------------------------+
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| Zend Engine |
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+----------------------------------------------------------------------+
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| Copyright (c) 1998-2008 Zend Technologies Ltd. (http://www.zend.com) |
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+----------------------------------------------------------------------+
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| This source file is subject to version 2.00 of the Zend license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.zend.com/license/2_00.txt. |
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| If you did not receive a copy of the Zend license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@zend.com so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Authors: Andi Gutmans <andi@zend.com> |
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| Zeev Suraski <zeev@zend.com> |
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+----------------------------------------------------------------------+
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*/
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/* $Id$ */
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#include "zend.h"
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#include "zend_constants.h"
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#include "zend_execute.h"
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#include "zend_variables.h"
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#include "zend_operators.h"
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#include "zend_globals.h"
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void free_zend_constant(zend_constant *c)
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{
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if (!(c->flags & CONST_PERSISTENT)) {
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zval_dtor(&c->value);
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}
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free(c->name);
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}
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void copy_zend_constant(zend_constant *c)
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{
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c->name = zend_strndup(c->name, c->name_len - 1);
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if (!(c->flags & CONST_PERSISTENT)) {
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zval_copy_ctor(&c->value);
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}
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}
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void zend_copy_constants(HashTable *target, HashTable *source)
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{
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zend_constant tmp_constant;
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zend_hash_copy(target, source, (copy_ctor_func_t) copy_zend_constant, &tmp_constant, sizeof(zend_constant));
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}
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static int clean_non_persistent_constant(zend_constant *c TSRMLS_DC)
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{
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return (c->flags & CONST_PERSISTENT) ? ZEND_HASH_APPLY_STOP : ZEND_HASH_APPLY_REMOVE;
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}
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static int clean_non_persistent_constant_full(zend_constant *c TSRMLS_DC)
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{
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return (c->flags & CONST_PERSISTENT) ? 0 : 1;
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}
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static int clean_module_constant(zend_constant *c, int *module_number TSRMLS_DC)
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{
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if (c->module_number == *module_number) {
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return 1;
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} else {
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return 0;
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}
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}
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void clean_module_constants(int module_number TSRMLS_DC)
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{
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zend_hash_apply_with_argument(EG(zend_constants), (apply_func_arg_t) clean_module_constant, (void *) &module_number TSRMLS_CC);
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}
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int zend_startup_constants(TSRMLS_D)
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{
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EG(zend_constants) = (HashTable *) malloc(sizeof(HashTable));
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if (zend_hash_init(EG(zend_constants), 20, NULL, ZEND_CONSTANT_DTOR, 1)==FAILURE) {
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return FAILURE;
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}
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return SUCCESS;
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}
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void zend_register_standard_constants(TSRMLS_D)
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{
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REGISTER_MAIN_LONG_CONSTANT("E_ERROR", E_ERROR, CONST_PERSISTENT | CONST_CS);
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REGISTER_MAIN_LONG_CONSTANT("E_RECOVERABLE_ERROR", E_RECOVERABLE_ERROR, CONST_PERSISTENT | CONST_CS);
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REGISTER_MAIN_LONG_CONSTANT("E_WARNING", E_WARNING, CONST_PERSISTENT | CONST_CS);
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REGISTER_MAIN_LONG_CONSTANT("E_PARSE", E_PARSE, CONST_PERSISTENT | CONST_CS);
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REGISTER_MAIN_LONG_CONSTANT("E_NOTICE", E_NOTICE, CONST_PERSISTENT | CONST_CS);
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REGISTER_MAIN_LONG_CONSTANT("E_STRICT", E_STRICT, CONST_PERSISTENT | CONST_CS);
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REGISTER_MAIN_LONG_CONSTANT("E_CORE_ERROR", E_CORE_ERROR, CONST_PERSISTENT | CONST_CS);
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REGISTER_MAIN_LONG_CONSTANT("E_CORE_WARNING", E_CORE_WARNING, CONST_PERSISTENT | CONST_CS);
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REGISTER_MAIN_LONG_CONSTANT("E_COMPILE_ERROR", E_COMPILE_ERROR, CONST_PERSISTENT | CONST_CS);
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REGISTER_MAIN_LONG_CONSTANT("E_COMPILE_WARNING", E_COMPILE_WARNING, CONST_PERSISTENT | CONST_CS);
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REGISTER_MAIN_LONG_CONSTANT("E_USER_ERROR", E_USER_ERROR, CONST_PERSISTENT | CONST_CS);
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REGISTER_MAIN_LONG_CONSTANT("E_USER_WARNING", E_USER_WARNING, CONST_PERSISTENT | CONST_CS);
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REGISTER_MAIN_LONG_CONSTANT("E_USER_NOTICE", E_USER_NOTICE, CONST_PERSISTENT | CONST_CS);
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REGISTER_MAIN_LONG_CONSTANT("E_ALL", E_ALL, CONST_PERSISTENT | CONST_CS);
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/* true/false constants */
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{
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zend_constant c;
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c.flags = CONST_PERSISTENT | CONST_CT_SUBST;
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c.module_number = 0;
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c.name = zend_strndup(ZEND_STRL("TRUE"));
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c.name_len = sizeof("TRUE");
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c.value.value.lval = 1;
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c.value.type = IS_BOOL;
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zend_register_constant(&c TSRMLS_CC);
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c.name = zend_strndup(ZEND_STRL("FALSE"));
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c.name_len = sizeof("FALSE");
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c.value.value.lval = 0;
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c.value.type = IS_BOOL;
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zend_register_constant(&c TSRMLS_CC);
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c.name = zend_strndup(ZEND_STRL("NULL"));
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c.name_len = sizeof("NULL");
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c.value.type = IS_NULL;
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zend_register_constant(&c TSRMLS_CC);
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c.flags = CONST_PERSISTENT;
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c.name = zend_strndup(ZEND_STRL("ZEND_THREAD_SAFE"));
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c.name_len = sizeof("ZEND_THREAD_SAFE");
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c.value.value.lval = ZTS_V;
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c.value.type = IS_BOOL;
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zend_register_constant(&c TSRMLS_CC);
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c.name = zend_strndup(ZEND_STRL("ZEND_DEBUG_BUILD"));
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c.name_len = sizeof("ZEND_DEBUG_BUILD");
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c.value.value.lval = ZEND_DEBUG;
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c.value.type = IS_BOOL;
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zend_register_constant(&c TSRMLS_CC);
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}
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}
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int zend_shutdown_constants(TSRMLS_D)
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{
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zend_hash_destroy(EG(zend_constants));
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free(EG(zend_constants));
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return SUCCESS;
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}
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void clean_non_persistent_constants(TSRMLS_D)
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{
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if (EG(full_tables_cleanup)) {
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zend_hash_apply(EG(zend_constants), (apply_func_t) clean_non_persistent_constant_full TSRMLS_CC);
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} else {
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zend_hash_reverse_apply(EG(zend_constants), (apply_func_t) clean_non_persistent_constant TSRMLS_CC);
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}
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}
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ZEND_API void zend_register_long_constant(char *name, uint name_len, long lval, int flags, int module_number TSRMLS_DC)
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{
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zend_constant c;
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c.value.type = IS_LONG;
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c.value.value.lval = lval;
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c.flags = flags;
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c.name = zend_strndup(name, name_len-1);
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c.name_len = name_len;
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c.module_number = module_number;
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zend_register_constant(&c TSRMLS_CC);
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}
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ZEND_API void zend_register_double_constant(char *name, uint name_len, double dval, int flags, int module_number TSRMLS_DC)
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{
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zend_constant c;
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c.value.type = IS_DOUBLE;
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c.value.value.dval = dval;
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c.flags = flags;
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c.name = zend_strndup(name, name_len-1);
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c.name_len = name_len;
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c.module_number = module_number;
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zend_register_constant(&c TSRMLS_CC);
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}
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ZEND_API void zend_register_stringl_constant(char *name, uint name_len, char *strval, uint strlen, int flags, int module_number TSRMLS_DC)
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{
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zend_constant c;
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c.value.type = IS_STRING;
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c.value.value.str.val = strval;
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c.value.value.str.len = strlen;
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c.flags = flags;
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c.name = zend_strndup(name, name_len-1);
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c.name_len = name_len;
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c.module_number = module_number;
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zend_register_constant(&c TSRMLS_CC);
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}
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ZEND_API void zend_register_string_constant(char *name, uint name_len, char *strval, int flags, int module_number TSRMLS_DC)
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{
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zend_register_stringl_constant(name, name_len, strval, strlen(strval), flags, module_number TSRMLS_CC);
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}
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ZEND_API int zend_get_constant(char *name, uint name_len, zval *result TSRMLS_DC)
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{
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zend_constant *c;
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int retval = 1;
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char *lookup_name;
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if (zend_hash_find(EG(zend_constants), name, name_len+1, (void **) &c) == FAILURE) {
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lookup_name = zend_str_tolower_dup(name, name_len);
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if (zend_hash_find(EG(zend_constants), lookup_name, name_len+1, (void **) &c)==SUCCESS) {
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if ((c->flags & CONST_CS) && memcmp(c->name, name, name_len) != 0) {
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retval=0;
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}
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} else {
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static char haltoff[] = "__COMPILER_HALT_OFFSET__";
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if (!EG(in_execution)) {
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retval = 0;
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} else if (name_len == sizeof("__COMPILER_HALT_OFFSET__")-1 &&
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!memcmp(name, "__COMPILER_HALT_OFFSET__", sizeof("__COMPILER_HALT_OFFSET__")-1)) {
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char *cfilename, *haltname;
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int len, clen;
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cfilename = zend_get_executed_filename(TSRMLS_C);
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clen = strlen(cfilename);
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/* check for __COMPILER_HALT_OFFSET__ */
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zend_mangle_property_name(&haltname, &len, haltoff,
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sizeof("__COMPILER_HALT_OFFSET__") - 1, cfilename, clen, 0);
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if (zend_hash_find(EG(zend_constants), haltname, len+1, (void **) &c) == SUCCESS) {
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retval = 1;
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} else {
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retval=0;
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}
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pefree(haltname, 0);
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} else {
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retval=0;
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}
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}
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efree(lookup_name);
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}
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if (retval) {
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*result = c->value;
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zval_copy_ctor(result);
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Z_SET_REFCOUNT_P(result, 1);
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Z_UNSET_ISREF_P(result);
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}
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return retval;
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}
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ZEND_API int zend_get_constant_ex(char *name, uint name_len, zval *result, zend_class_entry *scope, ulong flags TSRMLS_DC)
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{
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zend_constant *c;
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int retval = 1;
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char *colon;
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/* Skip leading :: */
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if (name[0] == ':' && name[1] == ':') {
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name += 2;
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name_len -= 2;
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flags &= ZEND_FETCH_CLASS_SILENT;
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}
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if ((colon = zend_memrchr(name, ':', name_len)) &&
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colon > name &&
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*(colon-1) == ':') {
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/* compound constant name */
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zend_class_entry *ce = NULL;
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int class_name_len = colon - name - 1;
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int const_name_len = name_len - class_name_len - 2;
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char *constant_name = constant_name = colon + 1;
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char *class_name = estrndup(name, class_name_len);
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char *lcname = zend_str_tolower_dup(class_name, class_name_len);
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zval **ret_constant;
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if (!scope) {
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if (EG(in_execution)) {
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scope = EG(scope);
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} else {
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scope = CG(active_class_entry);
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}
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}
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if (class_name_len == sizeof("self")-1 &&
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!memcmp(lcname, "self", sizeof("self")-1)) {
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if (scope) {
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ce = scope;
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} else {
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zend_error(E_ERROR, "Cannot access self:: when no class scope is active");
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retval = 0;
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}
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efree(lcname);
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} else if (class_name_len == sizeof("parent")-1 &&
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!memcmp(lcname, "parent", sizeof("parent")-1)) {
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if (!scope) {
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zend_error(E_ERROR, "Cannot access parent:: when no class scope is active");
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} else if (!scope->parent) {
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zend_error(E_ERROR, "Cannot access parent:: when current class scope has no parent");
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} else {
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ce = scope->parent;
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}
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efree(lcname);
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} else if (class_name_len == sizeof("static")-1 &&
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!memcmp(lcname, "static", sizeof("static")-1)) {
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if (EG(called_scope)) {
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ce = EG(called_scope);
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} else {
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zend_error(E_ERROR, "Cannot access static:: when no class scope is active");
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}
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efree(lcname);
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} else {
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/* Check for namespace constant */
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char *nsname;
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unsigned int nsname_len;
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/* Concatenate lowercase namespace name and constant name */
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lcname = erealloc(lcname, class_name_len + 2 + const_name_len + 1);
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lcname[class_name_len] = ':';
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lcname[class_name_len+1] = ':';
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memcpy(lcname + class_name_len + 2, constant_name, const_name_len + 1);
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nsname = lcname;
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nsname_len = class_name_len + 2 + const_name_len;
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if (flags & ZEND_FETCH_CLASS_RT_NS_NAME) {
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nsname = (char *)memchr(nsname, ':', nsname_len) + 2;
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nsname_len -= (nsname - lcname);
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}
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if (zend_hash_find(EG(zend_constants), nsname, nsname_len+1, (void **) &c) == SUCCESS) {
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efree(lcname);
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efree(class_name);
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*result = c->value;
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zval_update_constant_ex(&result, (void*)1, NULL TSRMLS_CC);
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zval_copy_ctor(result);
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Z_SET_REFCOUNT_P(result, 1);
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Z_UNSET_ISREF_P(result);
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return 1;
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}
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efree(lcname);
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if ((flags & IS_CONSTANT_RT_NS_CHECK) == 0) {
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/* Check for class */
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ce = zend_fetch_class(class_name, class_name_len, flags TSRMLS_CC);
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}
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}
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if (retval && ce) {
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if (zend_hash_find(&ce->constants_table, constant_name, const_name_len+1, (void **) &ret_constant) != SUCCESS) {
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retval = 0;
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}
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} else {
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if ((flags & ZEND_FETCH_CLASS_RT_NS_NAME) == 0) {
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if ((flags & IS_CONSTANT_RT_NS_CHECK) != 0) {
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name = constant_name;
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name_len = const_name_len;
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efree(class_name);
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retval = 1;
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return zend_get_constant(name, name_len, result TSRMLS_CC);
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}
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if ((flags & ZEND_FETCH_CLASS_SILENT) == 0) {
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zend_error(E_ERROR, "Class '%s' not found", class_name);
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}
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}
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retval = 0;
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}
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efree(class_name);
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if (retval) {
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zval_update_constant_ex(ret_constant, (void*)1, ce TSRMLS_CC);
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*result = **ret_constant;
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zval_copy_ctor(result);
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}
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return retval;
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}
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return zend_get_constant(name, name_len, result TSRMLS_CC);
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}
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ZEND_API int zend_register_constant(zend_constant *c TSRMLS_DC)
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{
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char *lowercase_name = NULL;
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char *name;
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int ret = SUCCESS;
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#if 0
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printf("Registering constant for module %d\n", c->module_number);
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#endif
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if (!(c->flags & CONST_CS)) {
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/* keep in mind that c->name_len already contains the '\0' */
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lowercase_name = estrndup(c->name, c->name_len-1);
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zend_str_tolower(lowercase_name, c->name_len-1);
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name = lowercase_name;
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} else {
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name = c->name;
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}
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if ((strncmp(name, "__COMPILER_HALT_OFFSET__", sizeof("__COMPILER_HALT_OFFSET__") - 1) == 0) ||
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zend_hash_add(EG(zend_constants), name, c->name_len, (void *) c, sizeof(zend_constant), NULL)==FAILURE) {
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zend_error(E_NOTICE,"Constant %s already defined", name);
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free(c->name);
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if (!(c->flags & CONST_PERSISTENT)) {
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zval_dtor(&c->value);
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}
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ret = FAILURE;
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}
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if (lowercase_name) {
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efree(lowercase_name);
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}
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return ret;
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}
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/*
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* Local variables:
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* tab-width: 4
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* c-basic-offset: 4
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* indent-tabs-mode: t
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* End:
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*/
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