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507 lines
15 KiB
C
507 lines
15 KiB
C
/*
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+----------------------------------------------------------------------+
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| Zend Engine |
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+----------------------------------------------------------------------+
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| Copyright (c) 1998-2010 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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str_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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if (!IS_INTERNED(c->name)) {
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c->name = zend_strndup(c->name, c->name_len - 1);
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}
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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(const 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(const 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(const 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_DEPRECATED", E_DEPRECATED, 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_USER_DEPRECATED", E_USER_DEPRECATED, 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(const 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(const 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(const 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(const 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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static int zend_get_halt_offset_constant(const char *name, uint name_len, zend_constant **c TSRMLS_DC)
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{
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int ret;
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static char haltoff[] = "__COMPILER_HALT_OFFSET__";
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if (!EG(in_execution)) {
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return 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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ret = zend_hash_find(EG(zend_constants), haltname, len+1, (void **) c);
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efree(haltname);
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return (ret == SUCCESS);
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} else {
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return 0;
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}
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}
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ZEND_API int zend_get_constant(const 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) {
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retval=0;
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}
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} else {
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retval = zend_get_halt_offset_constant(name, name_len, &c TSRMLS_CC);
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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(const 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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const char *colon;
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zend_class_entry *ce = NULL;
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char *class_name;
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zval **ret_constant;
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/* Skip leading \\ */
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if (name[0] == '\\') {
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name += 1;
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name_len -= 1;
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}
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if ((colon = zend_memrchr(name, ':', name_len)) &&
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colon > name && (*(colon - 1) == ':')) {
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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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const char *constant_name = colon + 1;
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char *lcname;
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class_name = estrndup(name, class_name_len);
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lcname = zend_str_tolower_dup(class_name, class_name_len);
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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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efree(lcname);
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ce = zend_fetch_class(class_name, class_name_len, flags TSRMLS_CC);
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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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if ((flags & ZEND_FETCH_CLASS_SILENT) == 0) {
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zend_error(E_ERROR, "Undefined class constant '%s::%s'", class_name, constant_name);
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}
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}
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} else if (!ce) {
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retval = 0;
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}
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efree(class_name);
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goto finish;
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}
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/* non-class constant */
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if ((colon = zend_memrchr(name, '\\', name_len)) != NULL) {
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/* compound constant name */
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int prefix_len = colon - name;
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int const_name_len = name_len - prefix_len - 1;
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const char *constant_name = colon + 1;
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char *lcname;
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int found_const = 0;
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lcname = zend_str_tolower_dup(name, prefix_len);
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/* Check for namespace constant */
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/* Concatenate lowercase namespace name and constant name */
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lcname = erealloc(lcname, prefix_len + 1 + const_name_len + 1);
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lcname[prefix_len] = '\\';
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memcpy(lcname + prefix_len + 1, constant_name, const_name_len + 1);
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if (zend_hash_find(EG(zend_constants), lcname, prefix_len + 1 + const_name_len + 1, (void **) &c) == SUCCESS) {
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found_const = 1;
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} else {
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/* try lowercase */
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zend_str_tolower(lcname + prefix_len + 1, const_name_len);
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if (zend_hash_find(EG(zend_constants), lcname, prefix_len + 1 + const_name_len + 1, (void **) &c) == SUCCESS) {
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if ((c->flags & CONST_CS) == 0) {
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found_const = 1;
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}
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}
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}
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efree(lcname);
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if(found_const) {
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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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/* name requires runtime resolution, need to check non-namespaced name */
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if ((flags & IS_CONSTANT_UNQUALIFIED) != 0) {
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name = constant_name;
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name_len = const_name_len;
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return zend_get_constant(name, name_len, result TSRMLS_CC);
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}
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retval = 0;
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finish:
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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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INIT_PZVAL(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_constant *zend_quick_get_constant(const zend_literal *key, ulong flags TSRMLS_DC)
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{
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zend_constant *c;
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|
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if (zend_hash_quick_find(EG(zend_constants), Z_STRVAL(key->constant), Z_STRLEN(key->constant) + 1, key->hash_value, (void **) &c) == FAILURE) {
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key++;
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if (zend_hash_quick_find(EG(zend_constants), Z_STRVAL(key->constant), Z_STRLEN(key->constant) + 1, key->hash_value, (void **) &c) == FAILURE ||
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(c->flags & CONST_CS) != 0) {
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if ((flags & (IS_CONSTANT_IN_NAMESPACE|IS_CONSTANT_UNQUALIFIED)) == (IS_CONSTANT_IN_NAMESPACE|IS_CONSTANT_UNQUALIFIED)) {
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key++;
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if (zend_hash_quick_find(EG(zend_constants), Z_STRVAL(key->constant), Z_STRLEN(key->constant) + 1, key->hash_value, (void **) &c) == FAILURE) {
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key++;
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if (zend_hash_quick_find(EG(zend_constants), Z_STRVAL(key->constant), Z_STRLEN(key->constant) + 1, key->hash_value, (void **) &c) == FAILURE ||
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(c->flags & CONST_CS) != 0) {
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key--;
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if (!zend_get_halt_offset_constant(Z_STRVAL(key->constant), Z_STRLEN(key->constant), &c TSRMLS_CC)) {
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return NULL;
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}
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}
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}
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} else {
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|
key--;
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if (!zend_get_halt_offset_constant(Z_STRVAL(key->constant), Z_STRLEN(key->constant), &c TSRMLS_CC)) {
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return NULL;
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}
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}
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}
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}
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return c;
|
|
}
|
|
|
|
ZEND_API int zend_register_constant(zend_constant *c TSRMLS_DC)
|
|
{
|
|
char *lowercase_name = NULL;
|
|
char *name;
|
|
int ret = SUCCESS;
|
|
|
|
#if 0
|
|
printf("Registering constant for module %d\n", c->module_number);
|
|
#endif
|
|
|
|
if (!(c->flags & CONST_CS)) {
|
|
/* keep in mind that c->name_len already contains the '\0' */
|
|
lowercase_name = estrndup(c->name, c->name_len-1);
|
|
zend_str_tolower(lowercase_name, c->name_len-1);
|
|
lowercase_name = zend_new_interned_string(lowercase_name, c->name_len, 1 TSRMLS_CC);
|
|
name = lowercase_name;
|
|
} else {
|
|
char *slash = strrchr(c->name, '\\');
|
|
if(slash) {
|
|
lowercase_name = estrndup(c->name, c->name_len-1);
|
|
zend_str_tolower(lowercase_name, slash-c->name);
|
|
lowercase_name = zend_new_interned_string(lowercase_name, c->name_len, 1 TSRMLS_CC);
|
|
name = lowercase_name;
|
|
} else {
|
|
name = c->name;
|
|
}
|
|
}
|
|
|
|
/* Check if the user is trying to define the internal pseudo constant name __COMPILER_HALT_OFFSET__ */
|
|
if ((c->name_len == sizeof("__COMPILER_HALT_OFFSET__")
|
|
&& !memcmp(name, "__COMPILER_HALT_OFFSET__", sizeof("__COMPILER_HALT_OFFSET__")-1))
|
|
|| zend_hash_add(EG(zend_constants), name, c->name_len, (void *) c, sizeof(zend_constant), NULL)==FAILURE) {
|
|
|
|
/* The internal __COMPILER_HALT_OFFSET__ is prefixed by NULL byte */
|
|
if (c->name[0] == '\0' && c->name_len > sizeof("\0__COMPILER_HALT_OFFSET__")
|
|
&& memcmp(name, "\0__COMPILER_HALT_OFFSET__", sizeof("\0__COMPILER_HALT_OFFSET__")) == 0) {
|
|
name++;
|
|
}
|
|
zend_error(E_NOTICE,"Constant %s already defined", name);
|
|
str_free(c->name);
|
|
if (!(c->flags & CONST_PERSISTENT)) {
|
|
zval_dtor(&c->value);
|
|
}
|
|
ret = FAILURE;
|
|
}
|
|
if (lowercase_name && !IS_INTERNED(lowercase_name)) {
|
|
efree(lowercase_name);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|
|
/*
|
|
* Local variables:
|
|
* tab-width: 4
|
|
* c-basic-offset: 4
|
|
* indent-tabs-mode: t
|
|
* End:
|
|
*/
|