This source file includes following definitions.
- free_zend_constant
- copy_zend_constant
- zend_copy_constants
- clean_non_persistent_constant
- clean_non_persistent_constant_full
- clean_module_constant
- clean_module_constants
- zend_startup_constants
- zend_register_standard_constants
- zend_shutdown_constants
- clean_non_persistent_constants
- zend_register_null_constant
- zend_register_bool_constant
- zend_register_long_constant
- zend_register_double_constant
- zend_register_stringl_constant
- zend_register_string_constant
- zend_get_special_constant
- zend_get_constant_str
- zend_get_constant
- zend_get_constant_ex
- zend_quick_get_constant
- zend_hash_add_constant
- zend_register_constant
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22 #include "zend.h"
23 #include "zend_constants.h"
24 #include "zend_exceptions.h"
25 #include "zend_execute.h"
26 #include "zend_variables.h"
27 #include "zend_operators.h"
28 #include "zend_globals.h"
29 #include "zend_API.h"
30
31 void free_zend_constant(zval *zv)
32 {
33 zend_constant *c = Z_PTR_P(zv);
34
35 if (!(c->flags & CONST_PERSISTENT)) {
36 zval_dtor(&c->value);
37 } else {
38 zval_internal_dtor(&c->value);
39 }
40 if (c->name) {
41 zend_string_release(c->name);
42 }
43 pefree(c, c->flags & CONST_PERSISTENT);
44 }
45
46
47 static void copy_zend_constant(zval *zv)
48 {
49 zend_constant *c = Z_PTR_P(zv);
50
51 Z_PTR_P(zv) = pemalloc(sizeof(zend_constant), c->flags & CONST_PERSISTENT);
52 memcpy(Z_PTR_P(zv), c, sizeof(zend_constant));
53
54 c = Z_PTR_P(zv);
55 c->name = zend_string_copy(c->name);
56 if (!(c->flags & CONST_PERSISTENT)) {
57 zval_copy_ctor(&c->value);
58 } else {
59 if (Z_TYPE(c->value) == IS_STRING) {
60 Z_STR(c->value) = zend_string_dup(Z_STR(c->value), 1);
61 }
62 }
63 }
64
65
66 void zend_copy_constants(HashTable *target, HashTable *source)
67 {
68 zend_hash_copy(target, source, copy_zend_constant);
69 }
70
71
72 static int clean_non_persistent_constant(zval *zv)
73 {
74 zend_constant *c = Z_PTR_P(zv);
75 return (c->flags & CONST_PERSISTENT) ? ZEND_HASH_APPLY_STOP : ZEND_HASH_APPLY_REMOVE;
76 }
77
78
79 static int clean_non_persistent_constant_full(zval *zv)
80 {
81 zend_constant *c = Z_PTR_P(zv);
82 return (c->flags & CONST_PERSISTENT) ? 0 : 1;
83 }
84
85
86 static int clean_module_constant(zval *el, void *arg)
87 {
88 zend_constant *c = (zend_constant *)Z_PTR_P(el);
89 int module_number = *(int *)arg;
90
91 if (c->module_number == module_number) {
92 return 1;
93 } else {
94 return 0;
95 }
96 }
97
98
99 void clean_module_constants(int module_number)
100 {
101 zend_hash_apply_with_argument(EG(zend_constants), clean_module_constant, (void *) &module_number);
102 }
103
104
105 int zend_startup_constants(void)
106 {
107 EG(zend_constants) = (HashTable *) malloc(sizeof(HashTable));
108
109 zend_hash_init(EG(zend_constants), 128, NULL, ZEND_CONSTANT_DTOR, 1);
110 return SUCCESS;
111 }
112
113
114
115 void zend_register_standard_constants(void)
116 {
117 REGISTER_MAIN_LONG_CONSTANT("E_ERROR", E_ERROR, CONST_PERSISTENT | CONST_CS);
118 REGISTER_MAIN_LONG_CONSTANT("E_RECOVERABLE_ERROR", E_RECOVERABLE_ERROR, CONST_PERSISTENT | CONST_CS);
119 REGISTER_MAIN_LONG_CONSTANT("E_WARNING", E_WARNING, CONST_PERSISTENT | CONST_CS);
120 REGISTER_MAIN_LONG_CONSTANT("E_PARSE", E_PARSE, CONST_PERSISTENT | CONST_CS);
121 REGISTER_MAIN_LONG_CONSTANT("E_NOTICE", E_NOTICE, CONST_PERSISTENT | CONST_CS);
122 REGISTER_MAIN_LONG_CONSTANT("E_STRICT", E_STRICT, CONST_PERSISTENT | CONST_CS);
123 REGISTER_MAIN_LONG_CONSTANT("E_DEPRECATED", E_DEPRECATED, CONST_PERSISTENT | CONST_CS);
124 REGISTER_MAIN_LONG_CONSTANT("E_CORE_ERROR", E_CORE_ERROR, CONST_PERSISTENT | CONST_CS);
125 REGISTER_MAIN_LONG_CONSTANT("E_CORE_WARNING", E_CORE_WARNING, CONST_PERSISTENT | CONST_CS);
126 REGISTER_MAIN_LONG_CONSTANT("E_COMPILE_ERROR", E_COMPILE_ERROR, CONST_PERSISTENT | CONST_CS);
127 REGISTER_MAIN_LONG_CONSTANT("E_COMPILE_WARNING", E_COMPILE_WARNING, CONST_PERSISTENT | CONST_CS);
128 REGISTER_MAIN_LONG_CONSTANT("E_USER_ERROR", E_USER_ERROR, CONST_PERSISTENT | CONST_CS);
129 REGISTER_MAIN_LONG_CONSTANT("E_USER_WARNING", E_USER_WARNING, CONST_PERSISTENT | CONST_CS);
130 REGISTER_MAIN_LONG_CONSTANT("E_USER_NOTICE", E_USER_NOTICE, CONST_PERSISTENT | CONST_CS);
131 REGISTER_MAIN_LONG_CONSTANT("E_USER_DEPRECATED", E_USER_DEPRECATED, CONST_PERSISTENT | CONST_CS);
132
133 REGISTER_MAIN_LONG_CONSTANT("E_ALL", E_ALL, CONST_PERSISTENT | CONST_CS);
134
135 REGISTER_MAIN_LONG_CONSTANT("DEBUG_BACKTRACE_PROVIDE_OBJECT", DEBUG_BACKTRACE_PROVIDE_OBJECT, CONST_PERSISTENT | CONST_CS);
136 REGISTER_MAIN_LONG_CONSTANT("DEBUG_BACKTRACE_IGNORE_ARGS", DEBUG_BACKTRACE_IGNORE_ARGS, CONST_PERSISTENT | CONST_CS);
137
138 {
139 REGISTER_MAIN_BOOL_CONSTANT("TRUE", 1, CONST_PERSISTENT | CONST_CT_SUBST);
140 REGISTER_MAIN_BOOL_CONSTANT("FALSE", 0, CONST_PERSISTENT | CONST_CT_SUBST);
141 REGISTER_MAIN_BOOL_CONSTANT("ZEND_THREAD_SAFE", ZTS_V, CONST_PERSISTENT | CONST_CS);
142 REGISTER_MAIN_BOOL_CONSTANT("ZEND_DEBUG_BUILD", ZEND_DEBUG, CONST_PERSISTENT | CONST_CS);
143 }
144 REGISTER_MAIN_NULL_CONSTANT("NULL", CONST_PERSISTENT | CONST_CT_SUBST);
145 }
146
147
148 int zend_shutdown_constants(void)
149 {
150 zend_hash_destroy(EG(zend_constants));
151 free(EG(zend_constants));
152 return SUCCESS;
153 }
154
155
156 void clean_non_persistent_constants(void)
157 {
158 if (EG(full_tables_cleanup)) {
159 zend_hash_apply(EG(zend_constants), clean_non_persistent_constant_full);
160 } else {
161 zend_hash_reverse_apply(EG(zend_constants), clean_non_persistent_constant);
162 }
163 }
164
165 ZEND_API void zend_register_null_constant(const char *name, size_t name_len, int flags, int module_number)
166 {
167 zend_constant c;
168
169 ZVAL_NULL(&c.value);
170 c.flags = flags;
171 c.name = zend_string_init(name, name_len, flags & CONST_PERSISTENT);
172 c.module_number = module_number;
173 zend_register_constant(&c);
174 }
175
176 ZEND_API void zend_register_bool_constant(const char *name, size_t name_len, zend_bool bval, int flags, int module_number)
177 {
178 zend_constant c;
179
180 ZVAL_BOOL(&c.value, bval);
181 c.flags = flags;
182 c.name = zend_string_init(name, name_len, flags & CONST_PERSISTENT);
183 c.module_number = module_number;
184 zend_register_constant(&c);
185 }
186
187 ZEND_API void zend_register_long_constant(const char *name, size_t name_len, zend_long lval, int flags, int module_number)
188 {
189 zend_constant c;
190
191 ZVAL_LONG(&c.value, lval);
192 c.flags = flags;
193 c.name = zend_string_init(name, name_len, flags & CONST_PERSISTENT);
194 c.module_number = module_number;
195 zend_register_constant(&c);
196 }
197
198
199 ZEND_API void zend_register_double_constant(const char *name, size_t name_len, double dval, int flags, int module_number)
200 {
201 zend_constant c;
202
203 ZVAL_DOUBLE(&c.value, dval);
204 c.flags = flags;
205 c.name = zend_string_init(name, name_len, flags & CONST_PERSISTENT);
206 c.module_number = module_number;
207 zend_register_constant(&c);
208 }
209
210
211 ZEND_API void zend_register_stringl_constant(const char *name, size_t name_len, char *strval, size_t strlen, int flags, int module_number)
212 {
213 zend_constant c;
214
215 ZVAL_NEW_STR(&c.value, zend_string_init(strval, strlen, flags & CONST_PERSISTENT));
216 c.flags = flags;
217 c.name = zend_string_init(name, name_len, flags & CONST_PERSISTENT);
218 c.module_number = module_number;
219 zend_register_constant(&c);
220 }
221
222
223 ZEND_API void zend_register_string_constant(const char *name, size_t name_len, char *strval, int flags, int module_number)
224 {
225 zend_register_stringl_constant(name, name_len, strval, strlen(strval), flags, module_number);
226 }
227
228 static zend_constant *zend_get_special_constant(const char *name, size_t name_len)
229 {
230 zend_constant *c;
231 static char haltoff[] = "__COMPILER_HALT_OFFSET__";
232
233 if (!EG(current_execute_data)) {
234 return NULL;
235 } else if (name_len == sizeof("__COMPILER_HALT_OFFSET__")-1 &&
236 !memcmp(name, "__COMPILER_HALT_OFFSET__", sizeof("__COMPILER_HALT_OFFSET__")-1)) {
237 const char *cfilename;
238 zend_string *haltname;
239 size_t clen;
240
241 cfilename = zend_get_executed_filename();
242 clen = strlen(cfilename);
243
244 haltname = zend_mangle_property_name(haltoff,
245 sizeof("__COMPILER_HALT_OFFSET__") - 1, cfilename, clen, 0);
246 c = zend_hash_find_ptr(EG(zend_constants), haltname);
247 zend_string_free(haltname);
248 return c;
249 } else {
250 return NULL;
251 }
252 }
253
254
255 ZEND_API zval *zend_get_constant_str(const char *name, size_t name_len)
256 {
257 zend_constant *c;
258 ALLOCA_FLAG(use_heap)
259
260 if ((c = zend_hash_str_find_ptr(EG(zend_constants), name, name_len)) == NULL) {
261 char *lcname = do_alloca(name_len + 1, use_heap);
262 zend_str_tolower_copy(lcname, name, name_len);
263 if ((c = zend_hash_str_find_ptr(EG(zend_constants), lcname, name_len)) != NULL) {
264 if (c->flags & CONST_CS) {
265 c = NULL;
266 }
267 } else {
268 c = zend_get_special_constant(name, name_len);
269 }
270 free_alloca(lcname, use_heap);
271 }
272
273 return c ? &c->value : NULL;
274 }
275
276 ZEND_API zval *zend_get_constant(zend_string *name)
277 {
278 zend_constant *c;
279 ALLOCA_FLAG(use_heap)
280
281 if ((c = zend_hash_find_ptr(EG(zend_constants), name)) == NULL) {
282 char *lcname = do_alloca(ZSTR_LEN(name) + 1, use_heap);
283 zend_str_tolower_copy(lcname, ZSTR_VAL(name), ZSTR_LEN(name));
284 if ((c = zend_hash_str_find_ptr(EG(zend_constants), lcname, ZSTR_LEN(name))) != NULL) {
285 if (c->flags & CONST_CS) {
286 c = NULL;
287 }
288 } else {
289 c = zend_get_special_constant(ZSTR_VAL(name), ZSTR_LEN(name));
290 }
291 free_alloca(lcname, use_heap);
292 }
293
294 return c ? &c->value : NULL;
295 }
296
297 ZEND_API zval *zend_get_constant_ex(zend_string *cname, zend_class_entry *scope, zend_ulong flags)
298 {
299 zend_constant *c;
300 const char *colon;
301 zend_class_entry *ce = NULL;
302 zend_string *class_name;
303 const char *name = ZSTR_VAL(cname);
304 size_t name_len = ZSTR_LEN(cname);
305
306
307 if (name[0] == '\\') {
308 name += 1;
309 name_len -= 1;
310 cname = NULL;
311 }
312
313 if ((colon = zend_memrchr(name, ':', name_len)) &&
314 colon > name && (*(colon - 1) == ':')) {
315 int class_name_len = colon - name - 1;
316 size_t const_name_len = name_len - class_name_len - 2;
317 zend_string *constant_name = zend_string_init(colon + 1, const_name_len, 0);
318 char *lcname;
319 zval *ret_constant = NULL;
320 ALLOCA_FLAG(use_heap)
321
322 class_name = zend_string_init(name, class_name_len, 0);
323 lcname = do_alloca(class_name_len + 1, use_heap);
324 zend_str_tolower_copy(lcname, name, class_name_len);
325 if (!scope) {
326 if (EG(current_execute_data)) {
327 scope = EG(scope);
328 } else {
329 scope = CG(active_class_entry);
330 }
331 }
332
333 if (class_name_len == sizeof("self")-1 &&
334 !memcmp(lcname, "self", sizeof("self")-1)) {
335 if (UNEXPECTED(!scope)) {
336 zend_throw_error(NULL, "Cannot access self:: when no class scope is active");
337 return NULL;
338 }
339 ce = scope;
340 } else if (class_name_len == sizeof("parent")-1 &&
341 !memcmp(lcname, "parent", sizeof("parent")-1)) {
342 if (UNEXPECTED(!scope)) {
343 zend_throw_error(NULL, "Cannot access parent:: when no class scope is active");
344 return NULL;
345 } else if (UNEXPECTED(!scope->parent)) {
346 zend_throw_error(NULL, "Cannot access parent:: when current class scope has no parent");
347 return NULL;
348 } else {
349 ce = scope->parent;
350 }
351 } else if (class_name_len == sizeof("static")-1 &&
352 !memcmp(lcname, "static", sizeof("static")-1)) {
353 ce = zend_get_called_scope(EG(current_execute_data));
354 if (UNEXPECTED(!ce)) {
355 zend_throw_error(NULL, "Cannot access static:: when no class scope is active");
356 return NULL;
357 }
358 } else {
359 ce = zend_fetch_class(class_name, flags);
360 }
361 free_alloca(lcname, use_heap);
362 if (ce) {
363 ret_constant = zend_hash_find(&ce->constants_table, constant_name);
364 if (ret_constant == NULL) {
365 if ((flags & ZEND_FETCH_CLASS_SILENT) == 0) {
366 zend_throw_error(NULL, "Undefined class constant '%s::%s'", ZSTR_VAL(class_name), ZSTR_VAL(constant_name));
367 zend_string_release(class_name);
368 zend_string_free(constant_name);
369 return NULL;
370 }
371 } else if (Z_ISREF_P(ret_constant)) {
372 ret_constant = Z_REFVAL_P(ret_constant);
373 }
374 }
375 zend_string_release(class_name);
376 zend_string_free(constant_name);
377 if (ret_constant && Z_CONSTANT_P(ret_constant)) {
378 if (UNEXPECTED(zval_update_constant_ex(ret_constant, 1, ce) != SUCCESS)) {
379 return NULL;
380 }
381 }
382 return ret_constant;
383 }
384
385
386 if ((colon = zend_memrchr(name, '\\', name_len)) != NULL) {
387
388 int prefix_len = colon - name;
389 size_t const_name_len = name_len - prefix_len - 1;
390 const char *constant_name = colon + 1;
391 char *lcname;
392 size_t lcname_len;
393 ALLOCA_FLAG(use_heap)
394
395 lcname_len = prefix_len + 1 + const_name_len;
396 lcname = do_alloca(lcname_len + 1, use_heap);
397 zend_str_tolower_copy(lcname, name, prefix_len);
398
399
400 lcname[prefix_len] = '\\';
401 memcpy(lcname + prefix_len + 1, constant_name, const_name_len + 1);
402
403 if ((c = zend_hash_str_find_ptr(EG(zend_constants), lcname, lcname_len)) == NULL) {
404
405 zend_str_tolower(lcname + prefix_len + 1, const_name_len);
406 if ((c = zend_hash_str_find_ptr(EG(zend_constants), lcname, lcname_len)) != NULL) {
407 if ((c->flags & CONST_CS) != 0) {
408 c = NULL;
409 }
410 }
411 }
412 free_alloca(lcname, use_heap);
413 if (c) {
414 return &c->value;
415 }
416
417 if ((flags & IS_CONSTANT_UNQUALIFIED) != 0) {
418 return zend_get_constant_str(constant_name, const_name_len);
419 }
420 return NULL;
421 }
422
423 if (cname) {
424 return zend_get_constant(cname);
425 } else {
426 return zend_get_constant_str(name, name_len);
427 }
428 }
429
430 zend_constant *zend_quick_get_constant(const zval *key, zend_ulong flags)
431 {
432 zend_constant *c;
433
434 if ((c = zend_hash_find_ptr(EG(zend_constants), Z_STR_P(key))) == NULL) {
435 key++;
436 if ((c = zend_hash_find_ptr(EG(zend_constants), Z_STR_P(key))) == NULL ||
437 (c->flags & CONST_CS) != 0) {
438 if ((flags & (IS_CONSTANT_IN_NAMESPACE|IS_CONSTANT_UNQUALIFIED)) == (IS_CONSTANT_IN_NAMESPACE|IS_CONSTANT_UNQUALIFIED)) {
439 key++;
440 if ((c = zend_hash_find_ptr(EG(zend_constants), Z_STR_P(key))) == NULL) {
441 key++;
442 if ((c = zend_hash_find_ptr(EG(zend_constants), Z_STR_P(key))) == NULL ||
443 (c->flags & CONST_CS) != 0) {
444
445 key--;
446 c = NULL;
447 }
448 }
449 } else {
450 key--;
451 c = NULL;
452 }
453 }
454 }
455 return c;
456 }
457
458 static void* zend_hash_add_constant(HashTable *ht, zend_string *key, zend_constant *c)
459 {
460 void *ret;
461 zend_constant *copy = pemalloc(sizeof(zend_constant), c->flags & CONST_PERSISTENT);
462
463 memcpy(copy, c, sizeof(zend_constant));
464 ret = zend_hash_add_ptr(ht, key, copy);
465 if (!ret) {
466 pefree(copy, c->flags & CONST_PERSISTENT);
467 }
468 return ret;
469 }
470
471 ZEND_API int zend_register_constant(zend_constant *c)
472 {
473 zend_string *lowercase_name = NULL;
474 zend_string *name;
475 int ret = SUCCESS;
476
477 #if 0
478 printf("Registering constant for module %d\n", c->module_number);
479 #endif
480
481 if (!(c->flags & CONST_CS)) {
482 lowercase_name = zend_string_alloc(ZSTR_LEN(c->name), c->flags & CONST_PERSISTENT);
483 zend_str_tolower_copy(ZSTR_VAL(lowercase_name), ZSTR_VAL(c->name), ZSTR_LEN(c->name));
484 lowercase_name = zend_new_interned_string(lowercase_name);
485 name = lowercase_name;
486 } else {
487 char *slash = strrchr(ZSTR_VAL(c->name), '\\');
488 if (slash) {
489 lowercase_name = zend_string_init(ZSTR_VAL(c->name), ZSTR_LEN(c->name), c->flags & CONST_PERSISTENT);
490 zend_str_tolower(ZSTR_VAL(lowercase_name), slash - ZSTR_VAL(c->name));
491 lowercase_name = zend_new_interned_string(lowercase_name);
492 name = lowercase_name;
493 } else {
494 name = c->name;
495 }
496 }
497
498
499 if ((ZSTR_LEN(c->name) == sizeof("__COMPILER_HALT_OFFSET__")-1
500 && !memcmp(ZSTR_VAL(name), "__COMPILER_HALT_OFFSET__", sizeof("__COMPILER_HALT_OFFSET__")-1))
501 || zend_hash_add_constant(EG(zend_constants), name, c) == NULL) {
502
503
504 if (ZSTR_VAL(c->name)[0] == '\0' && ZSTR_LEN(c->name) > sizeof("\0__COMPILER_HALT_OFFSET__")-1
505 && memcmp(ZSTR_VAL(name), "\0__COMPILER_HALT_OFFSET__", sizeof("\0__COMPILER_HALT_OFFSET__")) == 0) {
506 }
507 zend_error(E_NOTICE,"Constant %s already defined", ZSTR_VAL(name));
508 zend_string_release(c->name);
509 if (!(c->flags & CONST_PERSISTENT)) {
510 zval_dtor(&c->value);
511 }
512 ret = FAILURE;
513 }
514 if (lowercase_name) {
515 zend_string_release(lowercase_name);
516 }
517 return ret;
518 }
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