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 REGISTER_MAIN_LONG_CONSTANT("DEBUG_BACKTRACE_PROVIDE_OBJECT", DEBUG_BACKTRACE_PROVIDE_OBJECT, CONST_PERSISTENT | CONST_CS);
115 REGISTER_MAIN_LONG_CONSTANT("DEBUG_BACKTRACE_IGNORE_ARGS", DEBUG_BACKTRACE_IGNORE_ARGS, CONST_PERSISTENT | CONST_CS);
116 REGISTER_MAIN_BOOL_CONSTANT("ZEND_THREAD_SAFE", ZTS_V, CONST_PERSISTENT | CONST_CS);
117 REGISTER_MAIN_BOOL_CONSTANT("ZEND_DEBUG_BUILD", ZEND_DEBUG, CONST_PERSISTENT | CONST_CS);
118
119 /* Special constants true/false/null. */
120 REGISTER_MAIN_BOOL_CONSTANT("TRUE", 1, CONST_PERSISTENT);
121 REGISTER_MAIN_BOOL_CONSTANT("FALSE", 0, CONST_PERSISTENT);
122 REGISTER_MAIN_NULL_CONSTANT("NULL", CONST_PERSISTENT);
123
124 true_const = zend_hash_str_find_ptr(EG(zend_constants), "TRUE", sizeof("TRUE")-1);
125 false_const = zend_hash_str_find_ptr(EG(zend_constants), "FALSE", sizeof("FALSE")-1);
126 null_const = zend_hash_str_find_ptr(EG(zend_constants), "NULL", sizeof("NULL")-1);
127 }
128
129
zend_shutdown_constants(void)130 void zend_shutdown_constants(void)
131 {
132 zend_hash_destroy(EG(zend_constants));
133 free(EG(zend_constants));
134 }
135
zend_register_null_constant(const char * name,size_t name_len,int flags,int module_number)136 ZEND_API void zend_register_null_constant(const char *name, size_t name_len, int flags, int module_number)
137 {
138 zend_constant c;
139
140 ZVAL_NULL(&c.value);
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_bool_constant(const char * name,size_t name_len,bool bval,int flags,int module_number)146 ZEND_API void zend_register_bool_constant(const char *name, size_t name_len, bool bval, int flags, int module_number)
147 {
148 zend_constant c;
149
150 ZVAL_BOOL(&c.value, bval);
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
zend_register_long_constant(const char * name,size_t name_len,zend_long lval,int flags,int module_number)156 ZEND_API void zend_register_long_constant(const char *name, size_t name_len, zend_long lval, int flags, int module_number)
157 {
158 zend_constant c;
159
160 ZVAL_LONG(&c.value, lval);
161 ZEND_CONSTANT_SET_FLAGS(&c, flags, module_number);
162 c.name = zend_string_init_interned(name, name_len, flags & CONST_PERSISTENT);
163 zend_register_constant(&c);
164 }
165
166
zend_register_double_constant(const char * name,size_t name_len,double dval,int flags,int module_number)167 ZEND_API void zend_register_double_constant(const char *name, size_t name_len, double dval, int flags, int module_number)
168 {
169 zend_constant c;
170
171 ZVAL_DOUBLE(&c.value, dval);
172 ZEND_CONSTANT_SET_FLAGS(&c, flags, module_number);
173 c.name = zend_string_init_interned(name, name_len, flags & CONST_PERSISTENT);
174 zend_register_constant(&c);
175 }
176
177
zend_register_stringl_constant(const char * name,size_t name_len,const char * strval,size_t strlen,int flags,int module_number)178 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)
179 {
180 zend_constant c;
181
182 ZVAL_STR(&c.value, zend_string_init_interned(strval, strlen, flags & CONST_PERSISTENT));
183 ZEND_CONSTANT_SET_FLAGS(&c, flags, module_number);
184 c.name = zend_string_init_interned(name, name_len, flags & CONST_PERSISTENT);
185 zend_register_constant(&c);
186 }
187
188
zend_register_string_constant(const char * name,size_t name_len,const char * strval,int flags,int module_number)189 ZEND_API void zend_register_string_constant(const char *name, size_t name_len, const char *strval, int flags, int module_number)
190 {
191 zend_register_stringl_constant(name, name_len, strval, strlen(strval), flags, module_number);
192 }
193
zend_get_halt_offset_constant(const char * name,size_t name_len)194 static zend_constant *zend_get_halt_offset_constant(const char *name, size_t name_len)
195 {
196 zend_constant *c;
197 static const char haltoff[] = "__COMPILER_HALT_OFFSET__";
198
199 if (!EG(current_execute_data)) {
200 return NULL;
201 } else if (name_len == sizeof("__COMPILER_HALT_OFFSET__")-1 &&
202 !memcmp(name, "__COMPILER_HALT_OFFSET__", sizeof("__COMPILER_HALT_OFFSET__")-1)) {
203 const char *cfilename;
204 zend_string *haltname;
205 size_t clen;
206
207 cfilename = zend_get_executed_filename();
208 clen = strlen(cfilename);
209 /* check for __COMPILER_HALT_OFFSET__ */
210 haltname = zend_mangle_property_name(haltoff,
211 sizeof("__COMPILER_HALT_OFFSET__") - 1, cfilename, clen, 0);
212 c = zend_hash_find_ptr(EG(zend_constants), haltname);
213 zend_string_efree(haltname);
214 return c;
215 } else {
216 return NULL;
217 }
218 }
219
_zend_get_special_const(const char * name,size_t len)220 ZEND_API zend_constant *_zend_get_special_const(const char *name, size_t len) /* {{{ */
221 {
222 if (len == 4) {
223 if ((name[0] == 'n' || name[0] == 'N') &&
224 (name[1] == 'u' || name[1] == 'U') &&
225 (name[2] == 'l' || name[2] == 'L') &&
226 (name[3] == 'l' || name[3] == 'L')
227 ) {
228 return null_const;
229 }
230 if ((name[0] == 't' || name[0] == 'T') &&
231 (name[1] == 'r' || name[1] == 'R') &&
232 (name[2] == 'u' || name[2] == 'U') &&
233 (name[3] == 'e' || name[3] == 'E')
234 ) {
235 return true_const;
236 }
237 } else {
238 if ((name[0] == 'f' || name[0] == 'F') &&
239 (name[1] == 'a' || name[1] == 'A') &&
240 (name[2] == 'l' || name[2] == 'L') &&
241 (name[3] == 's' || name[3] == 'S') &&
242 (name[4] == 'e' || name[4] == 'E')
243 ) {
244 return false_const;
245 }
246 }
247 return NULL;
248 }
249 /* }}} */
250
zend_verify_const_access(zend_class_constant * c,zend_class_entry * scope)251 ZEND_API bool zend_verify_const_access(zend_class_constant *c, zend_class_entry *scope) /* {{{ */
252 {
253 if (ZEND_CLASS_CONST_FLAGS(c) & ZEND_ACC_PUBLIC) {
254 return 1;
255 } else if (ZEND_CLASS_CONST_FLAGS(c) & ZEND_ACC_PRIVATE) {
256 return (c->ce == scope);
257 } else {
258 ZEND_ASSERT(ZEND_CLASS_CONST_FLAGS(c) & ZEND_ACC_PROTECTED);
259 return zend_check_protected(c->ce, scope);
260 }
261 }
262 /* }}} */
263
zend_get_constant_str_impl(const char * name,size_t name_len)264 static zend_constant *zend_get_constant_str_impl(const char *name, size_t name_len)
265 {
266 zend_constant *c = zend_hash_str_find_ptr(EG(zend_constants), name, name_len);
267 if (c) {
268 return c;
269 }
270
271 c = zend_get_halt_offset_constant(name, name_len);
272 if (c) {
273 return c;
274 }
275
276 return zend_get_special_const(name, name_len);
277 }
278
zend_get_constant_str(const char * name,size_t name_len)279 ZEND_API zval *zend_get_constant_str(const char *name, size_t name_len)
280 {
281 zend_constant *c = zend_get_constant_str_impl(name, name_len);
282 if (c) {
283 return &c->value;
284 }
285 return NULL;
286 }
287
zend_get_constant_impl(zend_string * name)288 static zend_constant *zend_get_constant_impl(zend_string *name)
289 {
290 zend_constant *c = zend_hash_find_ptr(EG(zend_constants), name);
291 if (c) {
292 return c;
293 }
294
295 c = zend_get_halt_offset_constant(ZSTR_VAL(name), ZSTR_LEN(name));
296 if (c) {
297 return c;
298 }
299
300 return zend_get_special_const(ZSTR_VAL(name), ZSTR_LEN(name));
301 }
302
zend_get_constant(zend_string * name)303 ZEND_API zval *zend_get_constant(zend_string *name)
304 {
305 zend_constant *c = zend_get_constant_impl(name);
306 if (c) {
307 return &c->value;
308 }
309 return NULL;
310 }
311
zend_get_class_constant_ex(zend_string * class_name,zend_string * constant_name,zend_class_entry * scope,uint32_t flags)312 ZEND_API zval *zend_get_class_constant_ex(zend_string *class_name, zend_string *constant_name, zend_class_entry *scope, uint32_t flags)
313 {
314 zend_class_entry *ce = NULL;
315 zend_class_constant *c = NULL;
316 zval *ret_constant = NULL;
317
318 if (ZSTR_HAS_CE_CACHE(class_name)) {
319 ce = ZSTR_GET_CE_CACHE(class_name);
320 if (!ce) {
321 ce = zend_fetch_class(class_name, flags);
322 }
323 } else if (zend_string_equals_literal_ci(class_name, "self")) {
324 if (UNEXPECTED(!scope)) {
325 zend_throw_error(NULL, "Cannot access \"self\" when no class scope is active");
326 goto failure;
327 }
328 ce = scope;
329 } else if (zend_string_equals_literal_ci(class_name, "parent")) {
330 if (UNEXPECTED(!scope)) {
331 zend_throw_error(NULL, "Cannot access \"parent\" when no class scope is active");
332 goto failure;
333 } else if (UNEXPECTED(!scope->parent)) {
334 zend_throw_error(NULL, "Cannot access \"parent\" when current class scope has no parent");
335 goto failure;
336 } else {
337 ce = scope->parent;
338 }
339 } else if (zend_string_equals_literal_ci(class_name, "static")) {
340 ce = zend_get_called_scope(EG(current_execute_data));
341 if (UNEXPECTED(!ce)) {
342 zend_throw_error(NULL, "Cannot access \"static\" when no class scope is active");
343 goto failure;
344 }
345 } else {
346 ce = zend_fetch_class(class_name, flags);
347 }
348 if (ce) {
349 c = zend_hash_find_ptr(CE_CONSTANTS_TABLE(ce), constant_name);
350 if (c == NULL) {
351 if ((flags & ZEND_FETCH_CLASS_SILENT) == 0) {
352 zend_throw_error(NULL, "Undefined constant %s::%s", ZSTR_VAL(class_name), ZSTR_VAL(constant_name));
353 goto failure;
354 }
355 ret_constant = NULL;
356 } else {
357 if (!zend_verify_const_access(c, scope)) {
358 if ((flags & ZEND_FETCH_CLASS_SILENT) == 0) {
359 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));
360 }
361 goto failure;
362 }
363
364 if (UNEXPECTED(ce->ce_flags & ZEND_ACC_TRAIT)) {
365 /** Prevent accessing trait constants directly on cases like \defined() or \constant(), etc. */
366 if ((flags & ZEND_FETCH_CLASS_SILENT) == 0) {
367 zend_throw_error(NULL, "Cannot access trait constant %s::%s directly", ZSTR_VAL(class_name), ZSTR_VAL(constant_name));
368 }
369 goto failure;
370 }
371
372 ret_constant = &c->value;
373 }
374 }
375
376 if (ret_constant && Z_TYPE_P(ret_constant) == IS_CONSTANT_AST) {
377 zend_result ret;
378
379 if (IS_CONSTANT_VISITED(ret_constant)) {
380 zend_throw_error(NULL, "Cannot declare self-referencing constant %s::%s", ZSTR_VAL(class_name), ZSTR_VAL(constant_name));
381 ret_constant = NULL;
382 goto failure;
383 }
384
385 MARK_CONSTANT_VISITED(ret_constant);
386 ret = zval_update_constant_ex(ret_constant, c->ce);
387 RESET_CONSTANT_VISITED(ret_constant);
388
389 if (UNEXPECTED(ret != SUCCESS)) {
390 ret_constant = NULL;
391 goto failure;
392 }
393 }
394 failure:
395 return ret_constant;
396 }
397
zend_get_constant_ex(zend_string * cname,zend_class_entry * scope,uint32_t flags)398 ZEND_API zval *zend_get_constant_ex(zend_string *cname, zend_class_entry *scope, uint32_t flags)
399 {
400 zend_constant *c;
401 const char *colon;
402 const char *name = ZSTR_VAL(cname);
403 size_t name_len = ZSTR_LEN(cname);
404
405 /* Skip leading \\ */
406 if (name[0] == '\\') {
407 name += 1;
408 name_len -= 1;
409 cname = NULL;
410 }
411
412 if ((colon = zend_memrchr(name, ':', name_len)) &&
413 colon > name && (*(colon - 1) == ':')) {
414 int class_name_len = colon - name - 1;
415 size_t const_name_len = name_len - class_name_len - 2;
416 zend_string *constant_name = zend_string_init(colon + 1, const_name_len, 0);
417 zend_string *class_name = zend_string_init_interned(name, class_name_len, 0);
418 zval *ret_constant = zend_get_class_constant_ex(class_name, constant_name, scope, flags);
419
420 zend_string_release_ex(class_name, 0);
421 zend_string_efree(constant_name);
422 return ret_constant;
423 /*
424 zend_class_entry *ce = NULL;
425 zend_class_constant *c = NULL;
426 zval *ret_constant = NULL;
427
428 if (zend_string_equals_literal_ci(class_name, "self")) {
429 if (UNEXPECTED(!scope)) {
430 zend_throw_error(NULL, "Cannot access \"self\" when no class scope is active");
431 goto failure;
432 }
433 ce = scope;
434 } else if (zend_string_equals_literal_ci(class_name, "parent")) {
435 if (UNEXPECTED(!scope)) {
436 zend_throw_error(NULL, "Cannot access \"parent\" when no class scope is active");
437 goto failure;
438 } else if (UNEXPECTED(!scope->parent)) {
439 zend_throw_error(NULL, "Cannot access \"parent\" when current class scope has no parent");
440 goto failure;
441 } else {
442 ce = scope->parent;
443 }
444 } else if (zend_string_equals_literal_ci(class_name, "static")) {
445 ce = zend_get_called_scope(EG(current_execute_data));
446 if (UNEXPECTED(!ce)) {
447 zend_throw_error(NULL, "Cannot access \"static\" when no class scope is active");
448 goto failure;
449 }
450 } else {
451 ce = zend_fetch_class(class_name, flags);
452 }
453 if (ce) {
454 c = zend_hash_find_ptr(CE_CONSTANTS_TABLE(ce), constant_name);
455 if (c == NULL) {
456 if ((flags & ZEND_FETCH_CLASS_SILENT) == 0) {
457 zend_throw_error(NULL, "Undefined constant %s::%s", ZSTR_VAL(class_name), ZSTR_VAL(constant_name));
458 goto failure;
459 }
460 ret_constant = NULL;
461 } else {
462 if (!zend_verify_const_access(c, scope)) {
463 if ((flags & ZEND_FETCH_CLASS_SILENT) == 0) {
464 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));
465 }
466 goto failure;
467 }
468 ret_constant = &c->value;
469 }
470 }
471
472 if (ret_constant && Z_TYPE_P(ret_constant) == IS_CONSTANT_AST) {
473 zend_result ret;
474
475 if (IS_CONSTANT_VISITED(ret_constant)) {
476 zend_throw_error(NULL, "Cannot declare self-referencing constant %s::%s", ZSTR_VAL(class_name), ZSTR_VAL(constant_name));
477 ret_constant = NULL;
478 goto failure;
479 }
480
481 MARK_CONSTANT_VISITED(ret_constant);
482 ret = zval_update_constant_ex(ret_constant, c->ce);
483 RESET_CONSTANT_VISITED(ret_constant);
484
485 if (UNEXPECTED(ret != SUCCESS)) {
486 ret_constant = NULL;
487 goto failure;
488 }
489 }
490 failure:
491 zend_string_release_ex(class_name, 0);
492 zend_string_efree(constant_name);
493 return ret_constant;
494 */
495 }
496
497 /* non-class constant */
498 if ((colon = zend_memrchr(name, '\\', name_len)) != NULL) {
499 /* compound constant name */
500 int prefix_len = colon - name;
501 size_t const_name_len = name_len - prefix_len - 1;
502 const char *constant_name = colon + 1;
503 char *lcname;
504 size_t lcname_len;
505 ALLOCA_FLAG(use_heap)
506
507 /* Lowercase the namespace portion */
508 lcname_len = prefix_len + 1 + const_name_len;
509 lcname = do_alloca(lcname_len + 1, use_heap);
510 zend_str_tolower_copy(lcname, name, prefix_len);
511
512 lcname[prefix_len] = '\\';
513 memcpy(lcname + prefix_len + 1, constant_name, const_name_len + 1);
514
515 c = zend_hash_str_find_ptr(EG(zend_constants), lcname, lcname_len);
516 free_alloca(lcname, use_heap);
517
518 if (!c) {
519 if (flags & IS_CONSTANT_UNQUALIFIED_IN_NAMESPACE) {
520 /* name requires runtime resolution, need to check non-namespaced name */
521 c = zend_get_constant_str_impl(constant_name, const_name_len);
522 }
523 }
524 } else {
525 if (cname) {
526 c = zend_get_constant_impl(cname);
527 } else {
528 c = zend_get_constant_str_impl(name, name_len);
529 }
530 }
531
532 if (!c) {
533 if (!(flags & ZEND_FETCH_CLASS_SILENT)) {
534 zend_throw_error(NULL, "Undefined constant \"%s\"", name);
535 }
536 return NULL;
537 }
538
539 if (!(flags & ZEND_FETCH_CLASS_SILENT) && (ZEND_CONSTANT_FLAGS(c) & CONST_DEPRECATED)) {
540 zend_error(E_DEPRECATED, "Constant %s is deprecated", name);
541 }
542 return &c->value;
543 }
544
zend_hash_add_constant(HashTable * ht,zend_string * key,zend_constant * c)545 static void* zend_hash_add_constant(HashTable *ht, zend_string *key, zend_constant *c)
546 {
547 void *ret;
548 zend_constant *copy = pemalloc(sizeof(zend_constant), ZEND_CONSTANT_FLAGS(c) & CONST_PERSISTENT);
549
550 memcpy(copy, c, sizeof(zend_constant));
551 ret = zend_hash_add_ptr(ht, key, copy);
552 if (!ret) {
553 pefree(copy, ZEND_CONSTANT_FLAGS(c) & CONST_PERSISTENT);
554 }
555 return ret;
556 }
557
zend_register_constant(zend_constant * c)558 ZEND_API zend_result zend_register_constant(zend_constant *c)
559 {
560 zend_string *lowercase_name = NULL;
561 zend_string *name;
562 zend_result ret = SUCCESS;
563 bool persistent = (ZEND_CONSTANT_FLAGS(c) & CONST_PERSISTENT) != 0;
564
565 #if 0
566 printf("Registering constant for module %d\n", c->module_number);
567 #endif
568
569 const char *slash = strrchr(ZSTR_VAL(c->name), '\\');
570 if (slash) {
571 lowercase_name = zend_string_init(ZSTR_VAL(c->name), ZSTR_LEN(c->name), persistent);
572 zend_str_tolower(ZSTR_VAL(lowercase_name), slash - ZSTR_VAL(c->name));
573 lowercase_name = zend_new_interned_string(lowercase_name);
574 name = lowercase_name;
575 } else {
576 name = c->name;
577 }
578
579 /* Check if the user is trying to define any special constant */
580 if (zend_string_equals_literal(name, "__COMPILER_HALT_OFFSET__")
581 || (!persistent && zend_get_special_const(ZSTR_VAL(name), ZSTR_LEN(name)))
582 || zend_hash_add_constant(EG(zend_constants), name, c) == NULL
583 ) {
584 zend_error(E_WARNING, "Constant %s already defined", ZSTR_VAL(name));
585 zend_string_release(c->name);
586 if (!persistent) {
587 zval_ptr_dtor_nogc(&c->value);
588 }
589 ret = FAILURE;
590 }
591 if (lowercase_name) {
592 zend_string_release(lowercase_name);
593 }
594 return ret;
595 }
596
