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- /*
- +----------------------------------------------------------------------+
- | Zend Engine |
- +----------------------------------------------------------------------+
- | Copyright (c) 1998-2000 Zend Technologies Ltd. (http://www.zend.com) |
- +----------------------------------------------------------------------+
- | This source file is subject to version 0.92 of the Zend license, |
- | that is bundled with this package in the file LICENSE, and is |
- | available at through the world-wide-web at |
- | http://www.zend.com/license/0_92.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> |
- +----------------------------------------------------------------------+
- */
-
-
- #ifndef ZEND_EXECUTE_H
- #define ZEND_EXECUTE_H
-
- #include "zend_compile.h"
- #include "zend_hash.h"
- #include "zend_variables.h"
- #include "zend_execute_locks.h"
-
- typedef union _temp_variable {
- zval tmp_var;
- struct {
- zval **ptr_ptr;
- zval *ptr;
- } var;
- struct {
- zval tmp_var; /* a dummy */
-
- union {
- struct {
- zval *str;
- int offset;
- } str_offset;
- zend_property_reference overloaded_element;
- } data;
-
- unsigned char type;
- } EA;
- } temp_variable;
-
-
- ZEND_API extern void (*zend_execute)(zend_op_array *op_array ELS_DC);
-
- void init_executor(CLS_D ELS_DC);
- void shutdown_executor(ELS_D);
- void execute(zend_op_array *op_array ELS_DC);
- ZEND_API int zend_is_true(zval *op);
- static inline void safe_free_zval_ptr(zval *p)
- {
- ELS_FETCH();
-
- if (p!=EG(uninitialized_zval_ptr)) {
- FREE_ZVAL(p);
- }
- }
-
- ZEND_API int zend_eval_string(char *str, zval *retval_ptr, char *string_name CLS_DC ELS_DC);
- static inline int i_zend_is_true(zval *op)
- {
- int result;
-
- switch (op->type) {
- case IS_NULL:
- result = 0;
- break;
- case IS_LONG:
- case IS_BOOL:
- case IS_RESOURCE:
- result = (op->value.lval?1:0);
- break;
- case IS_DOUBLE:
- result = (op->value.dval ? 1 : 0);
- break;
- case IS_STRING:
- if (op->value.str.len == 0
- || (op->value.str.len==1 && op->value.str.val[0]=='0')) {
- result = 0;
- } else {
- result = 1;
- }
- break;
- case IS_ARRAY:
- result = (zend_hash_num_elements(op->value.ht)?1:0);
- break;
- case IS_OBJECT:
- result = (zend_hash_num_elements(op->value.obj.properties)?1:0);
- break;
- default:
- result = 0;
- break;
- }
- return result;
- }
-
- ZEND_API int zval_update_constant(zval **pp, void *arg);
-
- /* dedicated Zend executor functions - do not use! */
- static inline void zend_ptr_stack_clear_multiple(ELS_D)
- {
- void **p = EG(argument_stack).top_element-2;
- int delete_count = (ulong) *p;
-
- EG(argument_stack).top -= (delete_count+2);
- while (--delete_count>=0) {
- zval_ptr_dtor((zval **) --p);
- }
- EG(argument_stack).top_element = p;
- }
-
- static inline int zend_ptr_stack_get_arg(int requested_arg, void **data ELS_DC)
- {
- void **p = EG(argument_stack).top_element-2;
- int arg_count = (ulong) *p;
-
- if (requested_arg>arg_count) {
- return FAILURE;
- }
- *data = (p-arg_count+requested_arg-1);
- return SUCCESS;
- }
-
- #if SUPPORT_INTERACTIVE
- void execute_new_code(CLS_D);
- #endif
-
-
- /* services */
- ZEND_API char *get_active_function_name(void);
- ZEND_API char *zend_get_executed_filename(ELS_D);
- ZEND_API uint zend_get_executed_lineno(ELS_D);
- ZEND_API zend_bool zend_is_executing(void);
-
- ZEND_API void zend_set_timeout(long seconds);
- ZEND_API void zend_unset_timeout(void);
- ZEND_API void zend_timeout(int dummy);
-
- #ifdef ZEND_WIN32
- void zend_init_timeout_thread();
- void zend_shutdown_timeout_thread();
- #define WM_REGISTER_ZEND_TIMEOUT (WM_USER+1)
- #define WM_UNREGISTER_ZEND_TIMEOUT (WM_USER+2)
- #endif
-
- #define zendi_zval_copy_ctor(p) zval_copy_ctor(&(p))
- #define zendi_zval_dtor(p) zval_dtor(&(p))
-
- #define active_opline (*EG(opline_ptr))
-
- static inline void zend_assign_to_variable_reference(znode *result, zval **variable_ptr_ptr, zval **value_ptr_ptr, temp_variable *Ts ELS_DC)
- {
- zval *variable_ptr;
- zval *value_ptr;
-
- if (!value_ptr_ptr || !variable_ptr_ptr) {
- zend_error(E_ERROR, "Cannot create references to/from string offsets nor overloaded objects");
- return;
- }
-
- variable_ptr = *variable_ptr_ptr;
- value_ptr = *value_ptr_ptr;
-
- if (variable_ptr == EG(error_zval_ptr) || value_ptr==EG(error_zval_ptr)) {
- variable_ptr_ptr = &EG(uninitialized_zval_ptr);
- /* } else if (variable_ptr==&EG(uninitialized_zval) || variable_ptr!=value_ptr) { */
- } else if (variable_ptr_ptr != value_ptr_ptr) {
- variable_ptr->refcount--;
- if (variable_ptr->refcount==0) {
- zendi_zval_dtor(*variable_ptr);
- FREE_ZVAL(variable_ptr);
- }
-
- if (!PZVAL_IS_REF(value_ptr)) {
- /* break it away */
- value_ptr->refcount--;
- if (value_ptr->refcount>0) {
- ALLOC_ZVAL(*value_ptr_ptr);
- **value_ptr_ptr = *value_ptr;
- value_ptr = *value_ptr_ptr;
- zendi_zval_copy_ctor(*value_ptr);
- }
- value_ptr->refcount = 1;
- value_ptr->is_ref = 1;
- }
-
- *variable_ptr_ptr = value_ptr;
- value_ptr->refcount++;
- } else {
- if (variable_ptr->refcount>1) { /* we need to break away */
- SEPARATE_ZVAL(variable_ptr_ptr);
- }
- (*variable_ptr_ptr)->is_ref = 1;
- }
-
- if (result && !(result->u.EA.type & EXT_TYPE_UNUSED)) {
- Ts[result->u.var].var.ptr_ptr = variable_ptr_ptr;
- SELECTIVE_PZVAL_LOCK(*variable_ptr_ptr, result);
- AI_USE_PTR(Ts[result->u.var].var);
- }
- }
-
- #define IS_OVERLOADED_OBJECT 1
- #define IS_STRING_OFFSET 2
-
- #endif /* ZEND_EXECUTE_H */
-