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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2007 Zend Technologies Ltd. (http://www.zend.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 2.00 of the Zend 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.zend.com/license/2_00.txt. |
| If you did not receive a copy of the Zend license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@zend.com so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <andi@zend.com> |
| Zeev Suraski <zeev@zend.com> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include "zend.h"
#include "zend_constants.h"
#include "zend_execute.h"
#include "zend_variables.h"
#include "zend_operators.h"
#include "zend_globals.h"
void free_zend_constant(zend_constant *c)
{
if (!(c->flags & CONST_PERSISTENT)) {
zval_dtor(&c->value);
}
free(c->name);
}
void copy_zend_constant(zend_constant *c)
{
c->name = zend_strndup(c->name, c->name_len - 1);
if (!(c->flags & CONST_PERSISTENT)) {
zval_copy_ctor(&c->value);
}
}
void zend_copy_constants(HashTable *target, HashTable *source)
{
zend_constant tmp_constant;
zend_hash_copy(target, source, (copy_ctor_func_t) copy_zend_constant, &tmp_constant, sizeof(zend_constant));
}
static int clean_non_persistent_constant(zend_constant *c TSRMLS_DC)
{
return (c->flags & CONST_PERSISTENT) ? ZEND_HASH_APPLY_STOP : ZEND_HASH_APPLY_REMOVE;
}
static int clean_non_persistent_constant_full(zend_constant *c TSRMLS_DC)
{
return (c->flags & CONST_PERSISTENT) ? 0 : 1;
}
static int clean_module_constant(zend_constant *c, int *module_number TSRMLS_DC)
{
if (c->module_number == *module_number) {
return 1;
} else {
return 0;
}
}
void clean_module_constants(int module_number TSRMLS_DC)
{
zend_hash_apply_with_argument(EG(zend_constants), (apply_func_arg_t) clean_module_constant, (void *) &module_number TSRMLS_CC);
}
int zend_startup_constants(TSRMLS_D)
{
EG(zend_constants) = (HashTable *) malloc(sizeof(HashTable));
if (zend_hash_init(EG(zend_constants), 20, NULL, ZEND_CONSTANT_DTOR, 1)==FAILURE) {
return FAILURE;
}
return SUCCESS;
}
void zend_register_standard_constants(TSRMLS_D)
{
REGISTER_MAIN_LONG_CONSTANT("E_ERROR", E_ERROR, CONST_PERSISTENT | CONST_CS);
REGISTER_MAIN_LONG_CONSTANT("E_RECOVERABLE_ERROR", E_RECOVERABLE_ERROR, CONST_PERSISTENT | CONST_CS);
REGISTER_MAIN_LONG_CONSTANT("E_WARNING", E_WARNING, CONST_PERSISTENT | CONST_CS);
REGISTER_MAIN_LONG_CONSTANT("E_PARSE", E_PARSE, CONST_PERSISTENT | CONST_CS);
REGISTER_MAIN_LONG_CONSTANT("E_NOTICE", E_NOTICE, CONST_PERSISTENT | CONST_CS);
REGISTER_MAIN_LONG_CONSTANT("E_STRICT", E_STRICT, CONST_PERSISTENT | CONST_CS);
REGISTER_MAIN_LONG_CONSTANT("E_CORE_ERROR", E_CORE_ERROR, CONST_PERSISTENT | CONST_CS);
REGISTER_MAIN_LONG_CONSTANT("E_CORE_WARNING", E_CORE_WARNING, CONST_PERSISTENT | CONST_CS);
REGISTER_MAIN_LONG_CONSTANT("E_COMPILE_ERROR", E_COMPILE_ERROR, CONST_PERSISTENT | CONST_CS);
REGISTER_MAIN_LONG_CONSTANT("E_COMPILE_WARNING", E_COMPILE_WARNING, CONST_PERSISTENT | CONST_CS);
REGISTER_MAIN_LONG_CONSTANT("E_USER_ERROR", E_USER_ERROR, CONST_PERSISTENT | CONST_CS);
REGISTER_MAIN_LONG_CONSTANT("E_USER_WARNING", E_USER_WARNING, CONST_PERSISTENT | CONST_CS);
REGISTER_MAIN_LONG_CONSTANT("E_USER_NOTICE", E_USER_NOTICE, CONST_PERSISTENT | CONST_CS);
REGISTER_MAIN_LONG_CONSTANT("E_ALL", E_ALL, CONST_PERSISTENT | CONST_CS);
/* true/false constants */
{
zend_constant c;
c.flags = CONST_PERSISTENT | CONST_CT_SUBST;
c.module_number = 0;
c.name = zend_strndup(ZEND_STRL("TRUE"));
c.name_len = sizeof("TRUE");
c.value.value.lval = 1;
c.value.type = IS_BOOL;
zend_register_constant(&c TSRMLS_CC);
c.name = zend_strndup(ZEND_STRL("FALSE"));
c.name_len = sizeof("FALSE");
c.value.value.lval = 0;
c.value.type = IS_BOOL;
zend_register_constant(&c TSRMLS_CC);
c.name = zend_strndup(ZEND_STRL("NULL"));
c.name_len = sizeof("NULL");
c.value.type = IS_NULL;
zend_register_constant(&c TSRMLS_CC);
c.flags = CONST_PERSISTENT;
c.name = zend_strndup(ZEND_STRL("ZEND_THREAD_SAFE"));
c.name_len = sizeof("ZEND_THREAD_SAFE");
c.value.value.lval = ZTS_V;
c.value.type = IS_BOOL;
zend_register_constant(&c TSRMLS_CC);
}
}
int zend_shutdown_constants(TSRMLS_D)
{
zend_hash_destroy(EG(zend_constants));
free(EG(zend_constants));
return SUCCESS;
}
void clean_non_persistent_constants(TSRMLS_D)
{
if (EG(full_tables_cleanup)) {
zend_hash_apply(EG(zend_constants), (apply_func_t) clean_non_persistent_constant_full TSRMLS_CC);
} else {
zend_hash_reverse_apply(EG(zend_constants), (apply_func_t) clean_non_persistent_constant TSRMLS_CC);
}
}
ZEND_API void zend_register_long_constant(char *name, uint name_len, long lval, int flags, int module_number TSRMLS_DC)
{
zend_constant c;
c.value.type = IS_LONG;
c.value.value.lval = lval;
c.flags = flags;
c.name = zend_strndup(name, name_len-1);
c.name_len = name_len;
c.module_number = module_number;
zend_register_constant(&c TSRMLS_CC);
}
ZEND_API void zend_register_double_constant(char *name, uint name_len, double dval, int flags, int module_number TSRMLS_DC)
{
zend_constant c;
c.value.type = IS_DOUBLE;
c.value.value.dval = dval;
c.flags = flags;
c.name = zend_strndup(name, name_len-1);
c.name_len = name_len;
c.module_number = module_number;
zend_register_constant(&c TSRMLS_CC);
}
ZEND_API void zend_register_stringl_constant(char *name, uint name_len, char *strval, uint strlen, int flags, int module_number TSRMLS_DC)
{
zend_constant c;
c.value.type = IS_STRING;
c.value.value.str.val = strval;
c.value.value.str.len = strlen;
c.flags = flags;
c.name = zend_strndup(name, name_len-1);
c.name_len = name_len;
c.module_number = module_number;
zend_register_constant(&c TSRMLS_CC);
}
ZEND_API void zend_register_string_constant(char *name, uint name_len, char *strval, int flags, int module_number TSRMLS_DC)
{
zend_register_stringl_constant(name, name_len, strval, strlen(strval), flags, module_number TSRMLS_CC);
}
ZEND_API int zend_get_constant_ex(char *name, uint name_len, zval *result, zend_class_entry *scope TSRMLS_DC)
{
zend_constant *c;
int retval = 1;
char *lookup_name;
char *colon;
if ((colon = memchr(name, ':', name_len)) && colon[1] == ':') {
/* class constant */
zend_class_entry **ce = NULL;
int class_name_len = colon-name;
int const_name_len = name_len - class_name_len - 2;
char *constant_name = colon+2;
zval **ret_constant;
char *class_name;
if (!scope) {
if (EG(in_execution)) {
scope = EG(scope);
} else {
scope = CG(active_class_entry);
}
}
class_name = estrndup(name, class_name_len);
if (class_name_len == sizeof("self")-1 && strcmp(class_name, "self") == 0) {
if (scope) {
ce = &scope;
} else {
zend_error(E_ERROR, "Cannot access self:: when no class scope is active");
retval = 0;
}
} else if (class_name_len == sizeof("parent")-1 && strcmp(class_name, "parent") == 0) {
if (!scope) {
zend_error(E_ERROR, "Cannot access parent:: when no class scope is active");
} else if (!scope->parent) {
zend_error(E_ERROR, "Cannot access parent:: when current class scope has no parent");
} else {
ce = &scope->parent;
}
} else {
if (zend_lookup_class(class_name, class_name_len, &ce TSRMLS_CC) != SUCCESS) {
retval = 0;
}
}
if (retval && ce) {
if (zend_hash_find(&((*ce)->constants_table), constant_name, const_name_len+1, (void **) &ret_constant) != SUCCESS) {
retval = 0;
}
} else {
zend_error(E_ERROR, "Class '%s' not found", class_name);
retval = 0;
}
efree(class_name);
if (retval) {
zval_update_constant_ex(ret_constant, (void*)1, *ce TSRMLS_CC);
*result = **ret_constant;
zval_copy_ctor(result);
}
return retval;
}
if (zend_hash_find(EG(zend_constants), name, name_len+1, (void **) &c) == FAILURE) {
lookup_name = estrndup(name, name_len);
zend_str_tolower(lookup_name, name_len);
if (zend_hash_find(EG(zend_constants), lookup_name, name_len+1, (void **) &c)==SUCCESS) {
if ((c->flags & CONST_CS) && memcmp(c->name, name, name_len)!=0) {
retval=0;
}
} else {
char haltoff[] = "__COMPILER_HALT_OFFSET__";
if (!EG(in_execution)) {
retval = 0;
} else if (name_len == sizeof("__COMPILER_HALT_OFFSET__") - 1 && memcmp(haltoff, name, name_len) == 0) {
char *cfilename, *haltname;
int len, clen;
cfilename = zend_get_executed_filename(TSRMLS_C);
clen = strlen(cfilename);
/* check for __COMPILER_HALT_OFFSET__ */
zend_mangle_property_name(&haltname, &len, haltoff,
sizeof("__COMPILER_HALT_OFFSET__") - 1, cfilename, clen, 0);
if (zend_hash_find(EG(zend_constants), haltname, len+1, (void **) &c) == SUCCESS) {
retval = 1;
} else {
retval=0;
}
pefree(haltname, 0);
} else {
retval = 0;
}
}
efree(lookup_name);
}
if (retval) {
*result = c->value;
zval_copy_ctor(result);
result->refcount = 1;
result->is_ref = 0;
}
return retval;
}
ZEND_API int zend_get_constant(char *name, uint name_len, zval *result TSRMLS_DC)
{
return zend_get_constant_ex(name, name_len, result, NULL TSRMLS_CC);
}
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);
name = lowercase_name;
} else {
name = c->name;
}
if ((strncmp(name, "__COMPILER_HALT_OFFSET__", sizeof("__COMPILER_HALT_OFFSET__") - 1) == 0) ||
zend_hash_add(EG(zend_constants), name, c->name_len, (void *) c, sizeof(zend_constant), NULL)==FAILURE) {
zend_error(E_NOTICE,"Constant %s already defined", name);
free(c->name);
if (!(c->flags & CONST_PERSISTENT)) {
zval_dtor(&c->value);
}
ret = FAILURE;
}
if (lowercase_name) {
efree(lowercase_name);
}
return ret;
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* indent-tabs-mode: t
* End:
*/
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