static void* zend_hash_add_constant(HashTable *ht, zend_string *key, zend_constant *c)
{
void *ret;
zend_constant *copy = pemalloc(sizeof(zend_constant), ZEND_CONSTANT_FLAGS(c) & CONST_PERSISTENT);
memcpy(copy, c, sizeof(zend_constant));
ret = zend_hash_add_ptr(ht, key, copy);
if (!ret) {
pefree(copy, ZEND_CONSTANT_FLAGS(c) & CONST_PERSISTENT);
}
return ret;
}
static inline zend_constant *zend_get_constant_impl(zend_string *name)
{
zval *zv;
zend_constant *c;
ALLOCA_FLAG(use_heap)
zv = zend_hash_find(EG(zend_constants), name);
if (zv == NULL) {
char *lcname = do_alloca(ZSTR_LEN(name) + 1, use_heap);
zend_str_tolower_copy(lcname, ZSTR_VAL(name), ZSTR_LEN(name));
zv = zend_hash_str_find(EG(zend_constants), lcname, ZSTR_LEN(name));
if (zv != NULL) {
c = Z_PTR_P(zv);
if (ZEND_CONSTANT_FLAGS(c) & CONST_CS) {
c = NULL;
}
} else {
c = zend_get_special_constant(ZSTR_VAL(name), ZSTR_LEN(name));
}
free_alloca(lcname, use_heap);
return c;
} else {
return (zend_constant *) Z_PTR_P(zv);
}
}
ZEND_API int zend_register_constant(zend_constant *c)
{
zend_string *lowercase_name = NULL;
zend_string *name;
int ret = SUCCESS;
#if 0
printf("Registering constant for module %d\n", c->module_number);
#endif
if (!(ZEND_CONSTANT_FLAGS(c) & CONST_CS)) {
lowercase_name = zend_string_tolower_ex(c->name, ZEND_CONSTANT_FLAGS(c) & CONST_PERSISTENT);
lowercase_name = zend_new_interned_string(lowercase_name);
name = lowercase_name;
} else {
char *slash = strrchr(ZSTR_VAL(c->name), '\\');
if (slash) {
lowercase_name = zend_string_init(ZSTR_VAL(c->name), ZSTR_LEN(c->name), ZEND_CONSTANT_FLAGS(c) & CONST_PERSISTENT);
zend_str_tolower(ZSTR_VAL(lowercase_name), slash - ZSTR_VAL(c->name));
lowercase_name = zend_new_interned_string(lowercase_name);
name = lowercase_name;
} else {
name = c->name;
}
}
/* Check if the user is trying to define the internal pseudo constant name __COMPILER_HALT_OFFSET__ */
if (zend_string_equals_literal(name, "__COMPILER_HALT_OFFSET__")
|| zend_hash_add_constant(EG(zend_constants), name, c) == NULL) {
/* The internal __COMPILER_HALT_OFFSET__ is prefixed by NULL byte */
if (ZSTR_VAL(c->name)[0] == '\0' && ZSTR_LEN(c->name) > sizeof("\0__COMPILER_HALT_OFFSET__")-1
&& memcmp(ZSTR_VAL(name), "\0__COMPILER_HALT_OFFSET__", sizeof("\0__COMPILER_HALT_OFFSET__")) == 0) {
}
zend_error(E_NOTICE,"Constant %s already defined", ZSTR_VAL(name));
zend_string_release(c->name);
if (!(ZEND_CONSTANT_FLAGS(c) & CONST_PERSISTENT)) {
zval_ptr_dtor_nogc(&c->value);
}
ret = FAILURE;
}
if (lowercase_name) {
zend_string_release(lowercase_name);
}
return ret;
}
static void copy_zend_constant(zval *zv)
{
zend_constant *c = Z_PTR_P(zv);
ZEND_ASSERT(ZEND_CONSTANT_FLAGS(c) & CONST_PERSISTENT);
Z_PTR_P(zv) = pemalloc(sizeof(zend_constant), 1);
memcpy(Z_PTR_P(zv), c, sizeof(zend_constant));
c = Z_PTR_P(zv);
c->name = zend_string_copy(c->name);
if (Z_TYPE(c->value) == IS_STRING) {
Z_STR(c->value) = zend_string_dup(Z_STR(c->value), 1);
}
}
void free_zend_constant(zval *zv)
{
zend_constant *c = Z_PTR_P(zv);
if (!(ZEND_CONSTANT_FLAGS(c) & CONST_PERSISTENT)) {
zval_ptr_dtor_nogc(&c->value);
if (c->name) {
zend_string_release_ex(c->name, 0);
}
efree(c);
} else {
zval_internal_ptr_dtor(&c->value);
if (c->name) {
zend_string_release_ex(c->name, 1);
}
free(c);
}
}
static inline zend_constant *zend_get_constant_str_impl(const char *name, size_t name_len)
{
zend_constant *c;
ALLOCA_FLAG(use_heap)
if ((c = zend_hash_str_find_ptr(EG(zend_constants), name, name_len)) == NULL) {
char *lcname = do_alloca(name_len + 1, use_heap);
zend_str_tolower_copy(lcname, name, name_len);
if ((c = zend_hash_str_find_ptr(EG(zend_constants), lcname, name_len)) != NULL) {
if (ZEND_CONSTANT_FLAGS(c) & CONST_CS) {
c = NULL;
}
} else {
c = zend_get_special_constant(name, name_len);
}
free_alloca(lcname, use_heap);
}
return c;
}
ZEND_API int zend_register_constant(zend_constant *c)
{
zend_string *lowercase_name = NULL;
zend_string *name;
int ret = SUCCESS;
zend_bool persistent = (ZEND_CONSTANT_FLAGS(c) & CONST_PERSISTENT) != 0;
#if 0
printf("Registering constant for module %d\n", c->module_number);
#endif
char *slash = strrchr(ZSTR_VAL(c->name), '\\');
if (slash) {
lowercase_name = zend_string_init(ZSTR_VAL(c->name), ZSTR_LEN(c->name), persistent);
zend_str_tolower(ZSTR_VAL(lowercase_name), slash - ZSTR_VAL(c->name));
lowercase_name = zend_new_interned_string(lowercase_name);
name = lowercase_name;
} else {
name = c->name;
}
/* Check if the user is trying to define any special constant */
if (zend_string_equals_literal(name, "__COMPILER_HALT_OFFSET__")
|| (!persistent && zend_get_special_const(ZSTR_VAL(name), ZSTR_LEN(name)))
|| zend_hash_add_constant(EG(zend_constants), name, c) == NULL
) {
zend_error(E_NOTICE,"Constant %s already defined", ZSTR_VAL(name));
zend_string_release(c->name);
if (!persistent) {
zval_ptr_dtor_nogc(&c->value);
}
ret = FAILURE;
}
if (lowercase_name) {
zend_string_release(lowercase_name);
}
return ret;
}
ZEND_API zval *zend_get_constant_ex(zend_string *cname, zend_class_entry *scope, uint32_t flags)
{
zend_constant *c;
const char *colon;
zend_class_entry *ce = NULL;
const char *name = ZSTR_VAL(cname);
size_t name_len = ZSTR_LEN(cname);
/* Skip leading \\ */
if (name[0] == '\\') {
name += 1;
name_len -= 1;
cname = NULL;
}
if ((colon = zend_memrchr(name, ':', name_len)) &&
colon > name && (*(colon - 1) == ':')) {
int class_name_len = colon - name - 1;
size_t const_name_len = name_len - class_name_len - 2;
zend_string *constant_name = zend_string_init(colon + 1, const_name_len, 0);
zend_string *class_name = zend_string_init(name, class_name_len, 0);
zend_class_constant *c = NULL;
zval *ret_constant = NULL;
if (zend_string_equals_literal_ci(class_name, "self")) {
if (UNEXPECTED(!scope)) {
zend_throw_error(NULL, "Cannot access self:: when no class scope is active");
goto failure;
}
ce = scope;
} else if (zend_string_equals_literal_ci(class_name, "parent")) {
if (UNEXPECTED(!scope)) {
zend_throw_error(NULL, "Cannot access parent:: when no class scope is active");
goto failure;
} else if (UNEXPECTED(!scope->parent)) {
zend_throw_error(NULL, "Cannot access parent:: when current class scope has no parent");
goto failure;
} else {
ce = scope->parent;
}
} else if (zend_string_equals_literal_ci(class_name, "static")) {
ce = zend_get_called_scope(EG(current_execute_data));
if (UNEXPECTED(!ce)) {
zend_throw_error(NULL, "Cannot access static:: when no class scope is active");
goto failure;
}
} else {
ce = zend_fetch_class(class_name, flags);
}
if (ce) {
c = zend_hash_find_ptr(&ce->constants_table, constant_name);
if (c == NULL) {
if ((flags & ZEND_FETCH_CLASS_SILENT) == 0) {
zend_throw_error(NULL, "Undefined class constant '%s::%s'", ZSTR_VAL(class_name), ZSTR_VAL(constant_name));
goto failure;
}
ret_constant = NULL;
} else {
if (!zend_verify_const_access(c, scope)) {
zend_throw_error(NULL, "Cannot access %s const %s::%s", zend_visibility_string(Z_ACCESS_FLAGS(c->value)), ZSTR_VAL(class_name), ZSTR_VAL(constant_name));
goto failure;
}
ret_constant = &c->value;
}
}
if (ret_constant && Z_TYPE_P(ret_constant) == IS_CONSTANT_AST) {
int ret;
if (IS_CONSTANT_VISITED(ret_constant)) {
zend_throw_error(NULL, "Cannot declare self-referencing constant '%s::%s'", ZSTR_VAL(class_name), ZSTR_VAL(constant_name));
ret_constant = NULL;
goto failure;
}
MARK_CONSTANT_VISITED(ret_constant);
ret = zval_update_constant_ex(ret_constant, c->ce);
RESET_CONSTANT_VISITED(ret_constant);
if (UNEXPECTED(ret != SUCCESS)) {
ret_constant = NULL;
goto failure;
}
}
failure:
zend_string_release_ex(class_name, 0);
zend_string_efree(constant_name);
return ret_constant;
}
/* non-class constant */
if ((colon = zend_memrchr(name, '\\', name_len)) != NULL) {
/* compound constant name */
int prefix_len = colon - name;
size_t const_name_len = name_len - prefix_len - 1;
const char *constant_name = colon + 1;
char *lcname;
size_t lcname_len;
ALLOCA_FLAG(use_heap)
lcname_len = prefix_len + 1 + const_name_len;
lcname = do_alloca(lcname_len + 1, use_heap);
zend_str_tolower_copy(lcname, name, prefix_len);
/* Check for namespace constant */
lcname[prefix_len] = '\\';
memcpy(lcname + prefix_len + 1, constant_name, const_name_len + 1);
if ((c = zend_hash_str_find_ptr(EG(zend_constants), lcname, lcname_len)) == NULL) {
/* try lowercase */
zend_str_tolower(lcname + prefix_len + 1, const_name_len);
if ((c = zend_hash_str_find_ptr(EG(zend_constants), lcname, lcname_len)) != NULL) {
if ((ZEND_CONSTANT_FLAGS(c) & CONST_CS) != 0) {
c = NULL;
}
}
}
free_alloca(lcname, use_heap);
if (!c) {
if (!(flags & IS_CONSTANT_UNQUALIFIED)) {
return NULL;
}
/* name requires runtime resolution, need to check non-namespaced name */
c = zend_get_constant_str_impl(constant_name, const_name_len);
name = constant_name;
}
} else {
if (cname) {
c = zend_get_constant_impl(cname);
} else {
c = zend_get_constant_str_impl(name, name_len);
}
}
if (!c) {
return NULL;
}
if (!(flags & ZEND_GET_CONSTANT_NO_DEPRECATION_CHECK)) {
if (!(ZEND_CONSTANT_FLAGS(c) & (CONST_CS|CONST_CT_SUBST)) && is_access_deprecated(c, name)) {
zend_error(E_DEPRECATED,
"Case-insensitive constants are deprecated. "
"The correct casing for this constant is \"%s\"",
ZSTR_VAL(c->name));
}
}
return &c->value;
}
