1 /*
2 +----------------------------------------------------------------------+
3 | Zend Engine |
4 +----------------------------------------------------------------------+
5 | Copyright (c) Zend Technologies Ltd. (http://www.zend.com) |
6 +----------------------------------------------------------------------+
7 | This source file is subject to version 2.00 of the Zend license, |
8 | that is bundled with this package in the file LICENSE, and is |
9 | available through the world-wide-web at the following url: |
10 | http://www.zend.com/license/2_00.txt. |
11 | If you did not receive a copy of the Zend license and are unable to |
12 | obtain it through the world-wide-web, please send a note to |
13 | license@zend.com so we can mail you a copy immediately. |
14 +----------------------------------------------------------------------+
15 | Authors: Andi Gutmans <andi@php.net> |
16 | Zeev Suraski <zeev@php.net> |
17 +----------------------------------------------------------------------+
18 */
19
20 #include "zend.h"
21 #include "zend_constants.h"
22 #include "zend_exceptions.h"
23 #include "zend_execute.h"
24 #include "zend_variables.h"
25 #include "zend_operators.h"
26 #include "zend_globals.h"
27 #include "zend_API.h"
28 #include "zend_constants_arginfo.h"
29
30 /* Protection from recursive self-referencing class constants */
31 #define IS_CONSTANT_VISITED_MARK 0x80
32
33 #define IS_CONSTANT_VISITED(zv) (Z_CONSTANT_FLAGS_P(zv) & IS_CONSTANT_VISITED_MARK)
34 #define MARK_CONSTANT_VISITED(zv) Z_CONSTANT_FLAGS_P(zv) |= IS_CONSTANT_VISITED_MARK
35 #define RESET_CONSTANT_VISITED(zv) Z_CONSTANT_FLAGS_P(zv) &= ~IS_CONSTANT_VISITED_MARK
36
37 /* Use for special null/true/false constants. */
38 static zend_constant *null_const, *true_const, *false_const;
39
free_zend_constant(zval * zv)40 void free_zend_constant(zval *zv)
41 {
42 zend_constant *c = Z_PTR_P(zv);
43
44 if (!(ZEND_CONSTANT_FLAGS(c) & CONST_PERSISTENT)) {
45 zval_ptr_dtor_nogc(&c->value);
46 if (c->name) {
47 zend_string_release_ex(c->name, 0);
48 }
49 efree(c);
50 } else {
51 zval_internal_ptr_dtor(&c->value);
52 if (c->name) {
53 zend_string_release_ex(c->name, 1);
54 }
55 free(c);
56 }
57 }
58
59
60 #ifdef ZTS
copy_zend_constant(zval * zv)61 static void copy_zend_constant(zval *zv)
62 {
63 zend_constant *c = Z_PTR_P(zv);
64
65 ZEND_ASSERT(ZEND_CONSTANT_FLAGS(c) & CONST_PERSISTENT);
66 Z_PTR_P(zv) = pemalloc(sizeof(zend_constant), 1);
67 memcpy(Z_PTR_P(zv), c, sizeof(zend_constant));
68
69 c = Z_PTR_P(zv);
70 c->name = zend_string_copy(c->name);
71 if (Z_TYPE(c->value) == IS_STRING) {
72 Z_STR(c->value) = zend_string_dup(Z_STR(c->value), 1);
73 }
74 }
75
76
zend_copy_constants(HashTable * target,HashTable * source)77 void zend_copy_constants(HashTable *target, HashTable *source)
78 {
79 zend_hash_copy(target, source, copy_zend_constant);
80 }
81 #endif
82
83
clean_module_constant(zval * el,void * arg)84 static int clean_module_constant(zval *el, void *arg)
85 {
86 zend_constant *c = (zend_constant *)Z_PTR_P(el);
87 int module_number = *(int *)arg;
88
89 if (ZEND_CONSTANT_MODULE_NUMBER(c) == module_number) {
90 return ZEND_HASH_APPLY_REMOVE;
91 } else {
92 return ZEND_HASH_APPLY_KEEP;
93 }
94 }
95
96
clean_module_constants(int module_number)97 void clean_module_constants(int module_number)
98 {
99 zend_hash_apply_with_argument(EG(zend_constants), clean_module_constant, (void *) &module_number);
100 }
101
zend_startup_constants(void)102 void zend_startup_constants(void)
103 {
104 EG(zend_constants) = (HashTable *) malloc(sizeof(HashTable));
105 zend_hash_init(EG(zend_constants), 128, NULL, ZEND_CONSTANT_DTOR, 1);
106 }
107
108
109
zend_register_standard_constants(void)110 void zend_register_standard_constants(void)
111 {
112 register_zend_constants_symbols(0);
113
114 true_const = zend_hash_str_find_ptr(EG(zend_constants), "TRUE", sizeof("TRUE")-1);
115 false_const = zend_hash_str_find_ptr(EG(zend_constants), "FALSE", sizeof("FALSE")-1);
116 null_const = zend_hash_str_find_ptr(EG(zend_constants), "NULL", sizeof("NULL")-1);
117 }
118
119
zend_shutdown_constants(void)120 void zend_shutdown_constants(void)
121 {
122 zend_hash_destroy(EG(zend_constants));
123 free(EG(zend_constants));
124 }
125
zend_register_null_constant(const char * name,size_t name_len,int flags,int module_number)126 ZEND_API void zend_register_null_constant(const char *name, size_t name_len, int flags, int module_number)
127 {
128 zend_constant c;
129
130 ZVAL_NULL(&c.value);
131 ZEND_CONSTANT_SET_FLAGS(&c, flags, module_number);
132 c.name = zend_string_init_interned(name, name_len, flags & CONST_PERSISTENT);
133 zend_register_constant(&c);
134 }
135
zend_register_bool_constant(const char * name,size_t name_len,bool bval,int flags,int module_number)136 ZEND_API void zend_register_bool_constant(const char *name, size_t name_len, bool bval, int flags, int module_number)
137 {
138 zend_constant c;
139
140 ZVAL_BOOL(&c.value, bval);
141 ZEND_CONSTANT_SET_FLAGS(&c, flags, module_number);
142 c.name = zend_string_init_interned(name, name_len, flags & CONST_PERSISTENT);
143 zend_register_constant(&c);
144 }
145
zend_register_long_constant(const char * name,size_t name_len,zend_long lval,int flags,int module_number)146 ZEND_API void zend_register_long_constant(const char *name, size_t name_len, zend_long lval, int flags, int module_number)
147 {
148 zend_constant c;
149
150 ZVAL_LONG(&c.value, lval);
151 ZEND_CONSTANT_SET_FLAGS(&c, flags, module_number);
152 c.name = zend_string_init_interned(name, name_len, flags & CONST_PERSISTENT);
153 zend_register_constant(&c);
154 }
155
156
zend_register_double_constant(const char * name,size_t name_len,double dval,int flags,int module_number)157 ZEND_API void zend_register_double_constant(const char *name, size_t name_len, double dval, int flags, int module_number)
158 {
159 zend_constant c;
160
161 ZVAL_DOUBLE(&c.value, dval);
162 ZEND_CONSTANT_SET_FLAGS(&c, flags, module_number);
163 c.name = zend_string_init_interned(name, name_len, flags & CONST_PERSISTENT);
164 zend_register_constant(&c);
165 }
166
167
zend_register_stringl_constant(const char * name,size_t name_len,const char * strval,size_t strlen,int flags,int module_number)168 ZEND_API void zend_register_stringl_constant(const char *name, size_t name_len, const char *strval, size_t strlen, int flags, int module_number)
169 {
170 zend_constant c;
171
172 ZVAL_STR(&c.value, zend_string_init_interned(strval, strlen, flags & CONST_PERSISTENT));
173 ZEND_CONSTANT_SET_FLAGS(&c, flags, module_number);
174 c.name = zend_string_init_interned(name, name_len, flags & CONST_PERSISTENT);
175 zend_register_constant(&c);
176 }
177
178
zend_register_string_constant(const char * name,size_t name_len,const char * strval,int flags,int module_number)179 ZEND_API void zend_register_string_constant(const char *name, size_t name_len, const char *strval, int flags, int module_number)
180 {
181 zend_register_stringl_constant(name, name_len, strval, strlen(strval), flags, module_number);
182 }
183
zend_get_halt_offset_constant(const char * name,size_t name_len)184 static zend_constant *zend_get_halt_offset_constant(const char *name, size_t name_len)
185 {
186 zend_constant *c;
187 static const char haltoff[] = "__COMPILER_HALT_OFFSET__";
188
189 if (!EG(current_execute_data)) {
190 return NULL;
191 } else if (name_len == sizeof("__COMPILER_HALT_OFFSET__")-1 &&
192 !memcmp(name, "__COMPILER_HALT_OFFSET__", sizeof("__COMPILER_HALT_OFFSET__")-1)) {
193 const char *cfilename;
194 zend_string *haltname;
195 size_t clen;
196
197 cfilename = zend_get_executed_filename();
198 clen = strlen(cfilename);
199 /* check for __COMPILER_HALT_OFFSET__ */
200 haltname = zend_mangle_property_name(haltoff,
201 sizeof("__COMPILER_HALT_OFFSET__") - 1, cfilename, clen, 0);
202 c = zend_hash_find_ptr(EG(zend_constants), haltname);
203 zend_string_efree(haltname);
204 return c;
205 } else {
206 return NULL;
207 }
208 }
209
_zend_get_special_const(const char * name,size_t len)210 ZEND_API zend_constant *_zend_get_special_const(const char *name, size_t len) /* {{{ */
211 {
212 if (len == 4) {
213 if ((name[0] == 'n' || name[0] == 'N') &&
214 (name[1] == 'u' || name[1] == 'U') &&
215 (name[2] == 'l' || name[2] == 'L') &&
216 (name[3] == 'l' || name[3] == 'L')
217 ) {
218 return null_const;
219 }
220 if ((name[0] == 't' || name[0] == 'T') &&
221 (name[1] == 'r' || name[1] == 'R') &&
222 (name[2] == 'u' || name[2] == 'U') &&
223 (name[3] == 'e' || name[3] == 'E')
224 ) {
225 return true_const;
226 }
227 } else {
228 if ((name[0] == 'f' || name[0] == 'F') &&
229 (name[1] == 'a' || name[1] == 'A') &&
230 (name[2] == 'l' || name[2] == 'L') &&
231 (name[3] == 's' || name[3] == 'S') &&
232 (name[4] == 'e' || name[4] == 'E')
233 ) {
234 return false_const;
235 }
236 }
237 return NULL;
238 }
239 /* }}} */
240
zend_verify_const_access(zend_class_constant * c,zend_class_entry * scope)241 ZEND_API bool zend_verify_const_access(zend_class_constant *c, zend_class_entry *scope) /* {{{ */
242 {
243 if (ZEND_CLASS_CONST_FLAGS(c) & ZEND_ACC_PUBLIC) {
244 return 1;
245 } else if (ZEND_CLASS_CONST_FLAGS(c) & ZEND_ACC_PRIVATE) {
246 return (c->ce == scope);
247 } else {
248 ZEND_ASSERT(ZEND_CLASS_CONST_FLAGS(c) & ZEND_ACC_PROTECTED);
249 return zend_check_protected(c->ce, scope);
250 }
251 }
252 /* }}} */
253
zend_get_constant_str_impl(const char * name,size_t name_len)254 static zend_constant *zend_get_constant_str_impl(const char *name, size_t name_len)
255 {
256 zend_constant *c = zend_hash_str_find_ptr(EG(zend_constants), name, name_len);
257 if (c) {
258 return c;
259 }
260
261 c = zend_get_halt_offset_constant(name, name_len);
262 if (c) {
263 return c;
264 }
265
266 return zend_get_special_const(name, name_len);
267 }
268
zend_get_constant_str(const char * name,size_t name_len)269 ZEND_API zval *zend_get_constant_str(const char *name, size_t name_len)
270 {
271 zend_constant *c = zend_get_constant_str_impl(name, name_len);
272 if (c) {
273 return &c->value;
274 }
275 return NULL;
276 }
277
zend_get_constant_impl(zend_string * name)278 static zend_constant *zend_get_constant_impl(zend_string *name)
279 {
280 zend_constant *c = zend_hash_find_ptr(EG(zend_constants), name);
281 if (c) {
282 return c;
283 }
284
285 c = zend_get_halt_offset_constant(ZSTR_VAL(name), ZSTR_LEN(name));
286 if (c) {
287 return c;
288 }
289
290 return zend_get_special_const(ZSTR_VAL(name), ZSTR_LEN(name));
291 }
292
zend_get_constant(zend_string * name)293 ZEND_API zval *zend_get_constant(zend_string *name)
294 {
295 zend_constant *c = zend_get_constant_impl(name);
296 if (c) {
297 return &c->value;
298 }
299 return NULL;
300 }
301
zend_get_class_constant_ex(zend_string * class_name,zend_string * constant_name,zend_class_entry * scope,uint32_t flags)302 ZEND_API zval *zend_get_class_constant_ex(zend_string *class_name, zend_string *constant_name, zend_class_entry *scope, uint32_t flags)
303 {
304 zend_class_entry *ce = NULL;
305 zend_class_constant *c = NULL;
306 zval *ret_constant = NULL;
307
308 if (ZSTR_HAS_CE_CACHE(class_name)) {
309 ce = ZSTR_GET_CE_CACHE(class_name);
310 if (!ce) {
311 ce = zend_fetch_class(class_name, flags);
312 }
313 } else if (zend_string_equals_literal_ci(class_name, "self")) {
314 if (UNEXPECTED(!scope)) {
315 zend_throw_error(NULL, "Cannot access \"self\" when no class scope is active");
316 goto failure;
317 }
318 ce = scope;
319 } else if (zend_string_equals_literal_ci(class_name, "parent")) {
320 if (UNEXPECTED(!scope)) {
321 zend_throw_error(NULL, "Cannot access \"parent\" when no class scope is active");
322 goto failure;
323 } else if (UNEXPECTED(!scope->parent)) {
324 zend_throw_error(NULL, "Cannot access \"parent\" when current class scope has no parent");
325 goto failure;
326 } else {
327 ce = scope->parent;
328 }
329 } else if (zend_string_equals_ci(class_name, ZSTR_KNOWN(ZEND_STR_STATIC))) {
330 ce = zend_get_called_scope(EG(current_execute_data));
331 if (UNEXPECTED(!ce)) {
332 zend_throw_error(NULL, "Cannot access \"static\" when no class scope is active");
333 goto failure;
334 }
335 } else {
336 ce = zend_fetch_class(class_name, flags);
337 }
338 if (ce) {
339 c = zend_hash_find_ptr(CE_CONSTANTS_TABLE(ce), constant_name);
340 if (c == NULL) {
341 if ((flags & ZEND_FETCH_CLASS_SILENT) == 0) {
342 zend_throw_error(NULL, "Undefined constant %s::%s", ZSTR_VAL(class_name), ZSTR_VAL(constant_name));
343 goto failure;
344 }
345 ret_constant = NULL;
346 } else {
347 if (!zend_verify_const_access(c, scope)) {
348 if ((flags & ZEND_FETCH_CLASS_SILENT) == 0) {
349 zend_throw_error(NULL, "Cannot access %s constant %s::%s", zend_visibility_string(ZEND_CLASS_CONST_FLAGS(c)), ZSTR_VAL(class_name), ZSTR_VAL(constant_name));
350 }
351 goto failure;
352 }
353
354 if (UNEXPECTED(ce->ce_flags & ZEND_ACC_TRAIT)) {
355 /** Prevent accessing trait constants directly on cases like \defined() or \constant(), etc. */
356 if ((flags & ZEND_FETCH_CLASS_SILENT) == 0) {
357 zend_throw_error(NULL, "Cannot access trait constant %s::%s directly", ZSTR_VAL(class_name), ZSTR_VAL(constant_name));
358 }
359 goto failure;
360 }
361
362 if (UNEXPECTED(ZEND_CLASS_CONST_FLAGS(c) & ZEND_ACC_DEPRECATED)) {
363 if ((flags & ZEND_FETCH_CLASS_SILENT) == 0) {
364 zend_error(E_DEPRECATED, "Constant %s::%s is deprecated", ZSTR_VAL(class_name), ZSTR_VAL(constant_name));
365 if (EG(exception)) {
366 goto failure;
367 }
368 }
369 }
370 ret_constant = &c->value;
371 }
372 }
373
374 if (ret_constant && Z_TYPE_P(ret_constant) == IS_CONSTANT_AST) {
375 zend_result ret;
376
377 if (IS_CONSTANT_VISITED(ret_constant)) {
378 zend_throw_error(NULL, "Cannot declare self-referencing constant %s::%s", ZSTR_VAL(class_name), ZSTR_VAL(constant_name));
379 ret_constant = NULL;
380 goto failure;
381 }
382
383 MARK_CONSTANT_VISITED(ret_constant);
384 ret = zend_update_class_constant(c, constant_name, c->ce);
385 RESET_CONSTANT_VISITED(ret_constant);
386
387 if (UNEXPECTED(ret != SUCCESS)) {
388 ret_constant = NULL;
389 goto failure;
390 }
391 }
392 failure:
393 return ret_constant;
394 }
395
zend_get_constant_ex(zend_string * cname,zend_class_entry * scope,uint32_t flags)396 ZEND_API zval *zend_get_constant_ex(zend_string *cname, zend_class_entry *scope, uint32_t flags)
397 {
398 zend_constant *c;
399 const char *colon;
400 const char *name = ZSTR_VAL(cname);
401 size_t name_len = ZSTR_LEN(cname);
402
403 /* Skip leading \\ */
404 if (name[0] == '\\') {
405 name += 1;
406 name_len -= 1;
407 cname = NULL;
408 }
409
410 if ((colon = zend_memrchr(name, ':', name_len)) &&
411 colon > name && (*(colon - 1) == ':')) {
412 int class_name_len = colon - name - 1;
413 size_t const_name_len = name_len - class_name_len - 2;
414 zend_string *constant_name = zend_string_init(colon + 1, const_name_len, 0);
415 zend_string *class_name = zend_string_init_interned(name, class_name_len, 0);
416 zval *ret_constant = zend_get_class_constant_ex(class_name, constant_name, scope, flags);
417
418 zend_string_release_ex(class_name, 0);
419 zend_string_efree(constant_name);
420 return ret_constant;
421 /*
422 zend_class_entry *ce = NULL;
423 zend_class_constant *c = NULL;
424 zval *ret_constant = NULL;
425
426 if (zend_string_equals_literal_ci(class_name, "self")) {
427 if (UNEXPECTED(!scope)) {
428 zend_throw_error(NULL, "Cannot access \"self\" when no class scope is active");
429 goto failure;
430 }
431 ce = scope;
432 } else if (zend_string_equals_literal_ci(class_name, "parent")) {
433 if (UNEXPECTED(!scope)) {
434 zend_throw_error(NULL, "Cannot access \"parent\" when no class scope is active");
435 goto failure;
436 } else if (UNEXPECTED(!scope->parent)) {
437 zend_throw_error(NULL, "Cannot access \"parent\" when current class scope has no parent");
438 goto failure;
439 } else {
440 ce = scope->parent;
441 }
442 } else if (zend_string_equals_ci(class_name, ZSTR_KNOWN(ZEND_STR_STATIC))) {
443 ce = zend_get_called_scope(EG(current_execute_data));
444 if (UNEXPECTED(!ce)) {
445 zend_throw_error(NULL, "Cannot access \"static\" when no class scope is active");
446 goto failure;
447 }
448 } else {
449 ce = zend_fetch_class(class_name, flags);
450 }
451 if (ce) {
452 c = zend_hash_find_ptr(CE_CONSTANTS_TABLE(ce), constant_name);
453 if (c == NULL) {
454 if ((flags & ZEND_FETCH_CLASS_SILENT) == 0) {
455 zend_throw_error(NULL, "Undefined constant %s::%s", ZSTR_VAL(class_name), ZSTR_VAL(constant_name));
456 goto failure;
457 }
458 ret_constant = NULL;
459 } else {
460 if (!zend_verify_const_access(c, scope)) {
461 if ((flags & ZEND_FETCH_CLASS_SILENT) == 0) {
462 zend_throw_error(NULL, "Cannot access %s constant %s::%s", zend_visibility_string(ZEND_CLASS_CONST_FLAGS(c)), ZSTR_VAL(class_name), ZSTR_VAL(constant_name));
463 }
464 goto failure;
465 }
466 ret_constant = &c->value;
467 }
468 }
469
470 if (ret_constant && Z_TYPE_P(ret_constant) == IS_CONSTANT_AST) {
471 zend_result ret;
472
473 if (IS_CONSTANT_VISITED(ret_constant)) {
474 zend_throw_error(NULL, "Cannot declare self-referencing constant %s::%s", ZSTR_VAL(class_name), ZSTR_VAL(constant_name));
475 ret_constant = NULL;
476 goto failure;
477 }
478
479 MARK_CONSTANT_VISITED(ret_constant);
480 ret = zval_update_constant_ex(ret_constant, c->ce);
481 RESET_CONSTANT_VISITED(ret_constant);
482
483 if (UNEXPECTED(ret != SUCCESS)) {
484 ret_constant = NULL;
485 goto failure;
486 }
487 }
488 failure:
489 zend_string_release_ex(class_name, 0);
490 zend_string_efree(constant_name);
491 return ret_constant;
492 */
493 }
494
495 /* non-class constant */
496 if ((colon = zend_memrchr(name, '\\', name_len)) != NULL) {
497 /* compound constant name */
498 int prefix_len = colon - name;
499 size_t const_name_len = name_len - prefix_len - 1;
500 const char *constant_name = colon + 1;
501 char *lcname;
502 size_t lcname_len;
503 ALLOCA_FLAG(use_heap)
504
505 /* Lowercase the namespace portion */
506 lcname_len = prefix_len + 1 + const_name_len;
507 lcname = do_alloca(lcname_len + 1, use_heap);
508 zend_str_tolower_copy(lcname, name, prefix_len);
509
510 lcname[prefix_len] = '\\';
511 memcpy(lcname + prefix_len + 1, constant_name, const_name_len + 1);
512
513 c = zend_hash_str_find_ptr(EG(zend_constants), lcname, lcname_len);
514 free_alloca(lcname, use_heap);
515
516 if (!c) {
517 if (flags & IS_CONSTANT_UNQUALIFIED_IN_NAMESPACE) {
518 /* name requires runtime resolution, need to check non-namespaced name */
519 c = zend_get_constant_str_impl(constant_name, const_name_len);
520 }
521 }
522 } else {
523 if (cname) {
524 c = zend_get_constant_impl(cname);
525 } else {
526 c = zend_get_constant_str_impl(name, name_len);
527 }
528 }
529
530 if (!c) {
531 if (!(flags & ZEND_FETCH_CLASS_SILENT)) {
532 zend_throw_error(NULL, "Undefined constant \"%s\"", name);
533 }
534 return NULL;
535 }
536
537 if (!(flags & ZEND_FETCH_CLASS_SILENT) && (ZEND_CONSTANT_FLAGS(c) & CONST_DEPRECATED)) {
538 zend_error(E_DEPRECATED, "Constant %s is deprecated", name);
539 }
540 return &c->value;
541 }
542
zend_hash_add_constant(HashTable * ht,zend_string * key,zend_constant * c)543 static void* zend_hash_add_constant(HashTable *ht, zend_string *key, zend_constant *c)
544 {
545 void *ret;
546 zend_constant *copy = pemalloc(sizeof(zend_constant), ZEND_CONSTANT_FLAGS(c) & CONST_PERSISTENT);
547
548 memcpy(copy, c, sizeof(zend_constant));
549 ret = zend_hash_add_ptr(ht, key, copy);
550 if (!ret) {
551 pefree(copy, ZEND_CONSTANT_FLAGS(c) & CONST_PERSISTENT);
552 }
553 return ret;
554 }
555
zend_register_constant(zend_constant * c)556 ZEND_API zend_result zend_register_constant(zend_constant *c)
557 {
558 zend_string *lowercase_name = NULL;
559 zend_string *name;
560 zend_result ret = SUCCESS;
561 bool persistent = (ZEND_CONSTANT_FLAGS(c) & CONST_PERSISTENT) != 0;
562
563 #if 0
564 printf("Registering constant for module %d\n", c->module_number);
565 #endif
566
567 const char *slash = strrchr(ZSTR_VAL(c->name), '\\');
568 if (slash) {
569 lowercase_name = zend_string_init(ZSTR_VAL(c->name), ZSTR_LEN(c->name), persistent);
570 zend_str_tolower(ZSTR_VAL(lowercase_name), slash - ZSTR_VAL(c->name));
571 lowercase_name = zend_new_interned_string(lowercase_name);
572 name = lowercase_name;
573 } else {
574 name = c->name;
575 }
576
577 /* Check if the user is trying to define any special constant */
578 if (zend_string_equals_literal(name, "__COMPILER_HALT_OFFSET__")
579 || (!persistent && zend_get_special_const(ZSTR_VAL(name), ZSTR_LEN(name)))
580 || zend_hash_add_constant(EG(zend_constants), name, c) == NULL
581 ) {
582 zend_error(E_WARNING, "Constant %s already defined", ZSTR_VAL(name));
583 zend_string_release(c->name);
584 if (!persistent) {
585 zval_ptr_dtor_nogc(&c->value);
586 }
587 ret = FAILURE;
588 }
589 if (lowercase_name) {
590 zend_string_release(lowercase_name);
591 }
592 return ret;
593 }
594
