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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2008 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.v);
}
/* }}} */
void copy_zend_constant(zend_constant *c) /* {{{ */
{
TSRMLS_FETCH();
if (UG(unicode)) {
c->name.u = zend_ustrndup(c->name.u, c->name_len - 1);
} else {
c->name.s = zend_strndup(c->name.s, 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(const 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(const zend_constant *c TSRMLS_DC) /* {{{ */
{
return (c->flags & CONST_PERSISTENT) ? 0 : 1;
}
/* }}} */
static int clean_module_constant(const 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_u_hash_init(EG(zend_constants), 20, NULL, ZEND_CONSTANT_DTOR, 1, UG(unicode))==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_DEPRECATED", E_DEPRECATED, 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_USER_DEPRECATED", E_USER_DEPRECATED, CONST_PERSISTENT | CONST_CS);
REGISTER_MAIN_LONG_CONSTANT("E_ALL", E_ALL, CONST_PERSISTENT | CONST_CS);
REGISTER_MAIN_LONG_CONSTANT("U_CONV_ERROR_STOP", ZEND_CONV_ERROR_STOP, CONST_PERSISTENT | CONST_CS);
REGISTER_MAIN_LONG_CONSTANT("U_CONV_ERROR_SKIP", ZEND_CONV_ERROR_SKIP, CONST_PERSISTENT | CONST_CS);
REGISTER_MAIN_LONG_CONSTANT("U_CONV_ERROR_SUBST", ZEND_CONV_ERROR_SUBST, CONST_PERSISTENT | CONST_CS);
REGISTER_MAIN_LONG_CONSTANT("U_CONV_ERROR_ESCAPE_UNICODE", ZEND_CONV_ERROR_ESCAPE_UNICODE, CONST_PERSISTENT | CONST_CS);
REGISTER_MAIN_LONG_CONSTANT("U_CONV_ERROR_ESCAPE_ICU", ZEND_CONV_ERROR_ESCAPE_ICU, CONST_PERSISTENT | CONST_CS);
REGISTER_MAIN_LONG_CONSTANT("U_CONV_ERROR_ESCAPE_JAVA", ZEND_CONV_ERROR_ESCAPE_JAVA, CONST_PERSISTENT | CONST_CS);
REGISTER_MAIN_LONG_CONSTANT("U_CONV_ERROR_ESCAPE_XML_DEC", ZEND_CONV_ERROR_ESCAPE_XML_DEC, CONST_PERSISTENT | CONST_CS);
REGISTER_MAIN_LONG_CONSTANT("U_CONV_ERROR_ESCAPE_XML_HEX", ZEND_CONV_ERROR_ESCAPE_XML_HEX, CONST_PERSISTENT | CONST_CS);
REGISTER_MAIN_LONG_CONSTANT("FROM_UNICODE", ZEND_FROM_UNICODE, CONST_PERSISTENT | CONST_CS);
REGISTER_MAIN_LONG_CONSTANT("TO_UNICODE", ZEND_TO_UNICODE, CONST_PERSISTENT | CONST_CS);
/* true/false constants */
{
zend_constant c;
Z_TYPE(c.value) = IS_BOOL;
c.flags = CONST_PERSISTENT | CONST_CT_SUBST;
c.module_number = 0;
c.name.s = zend_strndup(ZEND_STRL("TRUE"));
c.name_len = sizeof("TRUE");
Z_LVAL(c.value) = 1;
Z_TYPE(c.value) = IS_BOOL;
zend_register_constant(&c TSRMLS_CC);
c.name.s = zend_strndup(ZEND_STRL("FALSE"));
c.name_len = sizeof("FALSE");
Z_LVAL(c.value) = 0;
Z_TYPE(c.value) = IS_BOOL;
zend_register_constant(&c TSRMLS_CC);
c.name.s = zend_strndup(ZEND_STRL("NULL"));
c.name_len = sizeof("NULL");
Z_TYPE(c.value) = IS_NULL;
zend_register_constant(&c TSRMLS_CC);
c.flags = CONST_PERSISTENT;
c.name.s = zend_strndup(ZEND_STRL("ZEND_THREAD_SAFE"));
c.name_len = sizeof("ZEND_THREAD_SAFE");
Z_LVAL(c.value) = ZTS_V;
Z_TYPE(c.value) = IS_BOOL;
zend_register_constant(&c TSRMLS_CC);
c.name.s = zend_strndup(ZEND_STRL("ZEND_DEBUG_BUILD"));
c.name_len = sizeof("ZEND_DEBUG_BUILD");
Z_LVAL(c.value) = ZEND_DEBUG;
Z_TYPE(c.value) = 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(const char *name, uint name_len, long lval, int flags, int module_number TSRMLS_DC) /* {{{ */
{
zend_constant c;
if (UG(unicode)) {
c.name.u = malloc(UBYTES(name_len));
u_charsToUChars(name, c.name.u, name_len);
c.name_len = name_len;
} else {
c.name.s = zend_strndup(name, name_len-1);
c.name_len = name_len;
}
Z_TYPE(c.value) = IS_LONG;
Z_LVAL(c.value) = lval;
c.flags = flags;
c.module_number = module_number;
zend_u_register_constant(ZEND_STR_TYPE, &c TSRMLS_CC);
}
/* }}} */
ZEND_API void zend_register_double_constant(const char *name, uint name_len, double dval, int flags, int module_number TSRMLS_DC) /* {{{ */
{
zend_constant c;
if (UG(unicode)) {
c.name.u = malloc(UBYTES(name_len));
u_charsToUChars(name, c.name.u, name_len);
c.name_len = name_len;
} else {
c.name.s = zend_strndup(name, name_len-1);
c.name_len = name_len;
}
Z_TYPE(c.value) = IS_DOUBLE;
Z_DVAL(c.value) = dval;
c.flags = flags;
c.module_number = module_number;
zend_u_register_constant(ZEND_STR_TYPE, &c TSRMLS_CC);
}
/* }}} */
ZEND_API void zend_register_stringl_constant(const char *name, uint name_len, char *strval, uint strlen, int flags, int module_number TSRMLS_DC) /* {{{ */
{
zend_constant c;
if (UG(unicode)) {
c.name.u = malloc(UBYTES(name_len));
u_charsToUChars(name, c.name.u, name_len);
c.name_len = name_len;
Z_TYPE(c.value) = IS_UNICODE;
if (flags & CONST_PERSISTENT) {
Z_USTRVAL(c.value) = malloc(UBYTES(strlen+1));
} else {
Z_USTRVAL(c.value) = emalloc(UBYTES(strlen+1));
}
u_charsToUChars(strval, Z_USTRVAL(c.value), strlen+1);
Z_USTRLEN(c.value) = strlen;
if (!(flags & CONST_PERSISTENT)) {
efree(strval);
}
} else {
c.name.s = zend_strndup(name, name_len-1);
c.name_len = name_len;
Z_TYPE(c.value) = IS_STRING;
Z_STRVAL(c.value) = strval;
Z_STRLEN(c.value) = strlen;
}
c.flags = flags;
c.module_number = module_number;
zend_u_register_constant(ZEND_STR_TYPE, &c TSRMLS_CC);
}
/* }}} */
ZEND_API void zend_register_string_constant(const 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_u_get_constant(zend_uchar type, zstr name, uint name_len, zval *result TSRMLS_DC) /* {{{ */
{
zend_constant *c;
int retval = 1;
zstr lookup_name;
if (zend_u_hash_find(EG(zend_constants), type, name, name_len+1, (void **) &c) == FAILURE) {
unsigned int lookup_name_len;
lookup_name = zend_u_str_case_fold(type, name, name_len, 1, &lookup_name_len);
if (zend_u_hash_find(EG(zend_constants), type, lookup_name, lookup_name_len+1, (void **) &c)==SUCCESS) {
if (c->flags & CONST_CS) {
retval=0;
}
} else {
if (!EG(in_execution)) {
retval = 0;
} else if (name_len == sizeof(ZEND_HALT_CONSTANT_NAME)-1 && ZEND_U_EQUAL(type, name, name_len, ZEND_HALT_CONSTANT_NAME, sizeof(ZEND_HALT_CONSTANT_NAME)-1)) {
char *cfilename;
zstr haltname;
int len, clen;
cfilename = zend_get_executed_filename(TSRMLS_C);
clen = strlen(cfilename);
/* check for __COMPILER_HALT_OFFSET__ */
zend_mangle_property_name(&haltname.s, &len, ZEND_HALT_CONSTANT_NAME,
sizeof(ZEND_HALT_CONSTANT_NAME) - 1, cfilename, clen, 0);
if (zend_u_hash_find(EG(zend_constants), IS_STRING, haltname, len+1, (void **) &c) == SUCCESS) {
retval=1;
} else {
retval=0;
}
pefree(haltname.s, 0);
} else {
retval=0;
}
}
efree(lookup_name.v);
}
if (retval) {
*result = c->value;
zval_copy_ctor(result);
Z_SET_REFCOUNT_P(result, 1);
Z_UNSET_ISREF_P(result);
}
return retval;
}
/* }}} */
ZEND_API int zend_u_get_constant_ex(zend_uchar type, zstr name, uint name_len, zval *result, zend_class_entry *scope, ulong flags TSRMLS_DC) /* {{{ */
{
zend_constant *c;
int retval = 1;
zstr colon;
/* Skip leading :: */
if (type == IS_UNICODE &&
name.u[0] == ':' &&
name.u[1] == ':') {
name.u += 2;
name_len -= 2;
flags &= ZEND_FETCH_CLASS_SILENT;
} else if (type == IS_STRING &&
name.s[0] == ':' &&
name.s[1] == ':') {
name.s += 2;
name_len -= 2;
flags &= ZEND_FETCH_CLASS_SILENT;
}
if ((type == IS_UNICODE && (colon.u = u_memrchr(name.u, ':', name_len)) && colon.u > name.u && *(colon.u-1) == ':') ||
(!type == IS_STRING && (colon.s = zend_memrchr(name.s, ':', name_len))&& colon.s > name.s && *(colon.s-1) == ':')) {
/* compound constant name */
zend_class_entry *ce = NULL;
int class_name_len = (type == IS_UNICODE) ? colon.u-name.u-1 : colon.s-name.s-1;
int const_name_len = name_len - class_name_len - 2;
zstr constant_name, class_name;
zval **ret_constant;
zstr lcname;
unsigned int lcname_len;
if (type == IS_UNICODE) {
constant_name.u = colon.u + 1;
} else {
constant_name.s = colon.s + 1;
}
if (!scope) {
if (EG(in_execution)) {
scope = EG(scope);
} else {
scope = CG(active_class_entry);
}
}
if (type == IS_UNICODE) {
class_name.u = eustrndup(name.u, class_name_len);
} else {
class_name.s = estrndup(name.s, class_name_len);
}
lcname = zend_u_str_case_fold(type, class_name, class_name_len, 0, &lcname_len);
if (lcname_len == sizeof("self")-1 &&
ZEND_U_EQUAL(type, lcname, lcname_len, "self", sizeof("self")-1)) {
if (scope) {
ce = scope;
} else {
zend_error(E_ERROR, "Cannot access self:: when no class scope is active");
retval = 0;
}
efree(lcname.v);
} else if (lcname_len == sizeof("parent")-1 &&
ZEND_U_EQUAL(type, lcname, lcname_len, "parent", sizeof("parent")-1)) {
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;
}
efree(lcname.v);
} else if (lcname_len == sizeof("static")-1 &&
ZEND_U_EQUAL(type, lcname, lcname_len, "static", sizeof("static")-1)) {
if (EG(called_scope)) {
ce = EG(called_scope);
} else {
zend_error(E_ERROR, "Cannot access static:: when no class scope is active");
}
efree(lcname.v);
} else {
/* Check for namespace constant */
zstr nsname;
unsigned int nsname_len;
/* Concatenate lowercase namespace name and constant name */
if (type == IS_UNICODE) {
lcname.u = erealloc(lcname.u, UBYTES(lcname_len + 2 + const_name_len + 1));
lcname.u[lcname_len] = ':';
lcname.u[lcname_len+1] = ':';
memcpy(lcname.u+lcname_len+2, constant_name.u, UBYTES(const_name_len + 1));
} else {
lcname.s = erealloc(lcname.s, lcname_len + 2 + const_name_len + 1);
lcname.s[lcname_len] = ':';
lcname.s[lcname_len+1] = ':';
memcpy(lcname.s+lcname_len+2, constant_name.s, const_name_len + 1);
}
lcname_len += 2 + const_name_len;
nsname = lcname;
nsname_len = lcname_len;
if (flags & ZEND_FETCH_CLASS_RT_NS_NAME) {
/* Remove namespace name */
if (type == IS_UNICODE) {
nsname.u = u_memchr(nsname.u, ':', nsname_len) + 2;
nsname_len -= (nsname.u - lcname.u);
} else {
nsname.s = (char *)memchr(nsname.s, ':', nsname_len) + 2;
nsname_len -= (nsname.s - lcname.s);
}
}
if (zend_u_hash_find(EG(zend_constants), type, nsname, nsname_len+1, (void **) &c) == SUCCESS) {
efree(lcname.v);
efree(class_name.v);
*result = c->value;
zval_update_constant_ex(&result, (void*)1, NULL TSRMLS_CC);
zval_copy_ctor(result);
Z_SET_REFCOUNT_P(result, 1);
Z_UNSET_ISREF_P(result);
return 1;
}
efree(lcname.v);
if ((flags & IS_CONSTANT_RT_NS_CHECK) == 0) {
/* Check for class */
ce = zend_u_fetch_class(type, class_name, class_name_len, flags TSRMLS_CC);
}
}
if (retval && ce) {
if (zend_u_hash_find(&ce->constants_table, type, constant_name, const_name_len+1, (void **) &ret_constant) != SUCCESS) {
retval = 0;
}
} else {
if ((flags & ZEND_FETCH_CLASS_RT_NS_NAME) == 0) {
if ((flags & IS_CONSTANT_RT_NS_CHECK) != 0) {
name = constant_name;
name_len = const_name_len;
efree(class_name.v);
return zend_u_get_constant(type, name, name_len, result TSRMLS_CC);
}
if ((flags & ZEND_FETCH_CLASS_SILENT) == 0) {
zend_error(E_ERROR, "Class '%R' not found", type, class_name);
}
}
retval = 0;
}
efree(class_name.v);
if (retval) {
zval_update_constant_ex(ret_constant, (void*)1, ce TSRMLS_CC);
*result = **ret_constant;
zval_copy_ctor(result);
INIT_PZVAL(result);
}
return retval;
}
return zend_u_get_constant(type, name, name_len, result TSRMLS_CC);
}
/* }}} */
ZEND_API int zend_get_constant(const char *name, uint name_len, zval *result TSRMLS_DC) /* {{{ */
{
return zend_u_get_constant_ex(IS_STRING, ZSTR(name), name_len, result, NULL, 0 TSRMLS_CC);
}
/* }}} */
ZEND_API int zend_u_register_constant(zend_uchar type, zend_constant *c TSRMLS_DC) /* {{{ */
{
unsigned int lookup_name_len;
zstr lookup_name;
zstr 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' */
name = lookup_name = zend_u_str_case_fold(type, c->name, c->name_len-1, 1, &lookup_name_len);
lookup_name_len++;
} else {
lookup_name_len = c->name_len;
name = c->name;
lookup_name = NULL_ZSTR;
}
if (EG(in_execution) && lookup_name_len == sizeof(ZEND_HALT_CONSTANT_NAME) && ZEND_U_EQUAL(type, name, lookup_name_len-1, ZEND_HALT_CONSTANT_NAME, sizeof(ZEND_HALT_CONSTANT_NAME)-1)) {
zend_error(E_NOTICE,"Constant %R already defined", type, name);
if (lookup_name.v) {
efree(lookup_name.v);
}
ret = FAILURE;
}
if (zend_u_hash_add(EG(zend_constants), type, name, lookup_name_len, (void *) c, sizeof(zend_constant), NULL)==FAILURE) {
zend_error(E_NOTICE,"Constant %R already defined", type, name);
free(c->name.v);
if (!(c->flags & CONST_PERSISTENT)) {
zval_dtor(&c->value);
}
ret = FAILURE;
}
if (lookup_name.v) {
efree(lookup_name.v);
}
return ret;
}
/* }}} */
ZEND_API int zend_register_constant(zend_constant *c TSRMLS_DC) /* {{{ */
{
if (UG(unicode)) {
UChar *ustr;
if (c->name.s) {
ustr = malloc(UBYTES(c->name_len));
u_charsToUChars(c->name.s, ustr, c->name_len);
free(c->name.s);
c->name.u = ustr;
}
if (Z_TYPE(c->value) == IS_STRING || (Z_TYPE(c->value) & IS_CONSTANT_TYPE_MASK) == IS_CONSTANT) {
ustr = pemalloc(UBYTES(Z_STRLEN(c->value)+1), c->flags & CONST_PERSISTENT);
u_charsToUChars(Z_STRVAL(c->value), ustr, Z_STRLEN(c->value)+1);
pefree(Z_STRVAL(c->value), c->flags & CONST_PERSISTENT);
Z_USTRVAL(c->value) = ustr;
if (Z_TYPE(c->value) == IS_STRING) Z_TYPE(c->value) = IS_UNICODE;
}
return zend_u_register_constant(IS_UNICODE, c TSRMLS_CC);
} else {
return zend_u_register_constant(IS_STRING, c TSRMLS_CC);
}
}
/* }}} */
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* indent-tabs-mode: t
* End:
*/
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