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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2005 Zend Technologies Ltd. (http://www.zend.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 2.00 of the Zend license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.zend.com/license/2_00.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> |
+----------------------------------------------------------------------+
*/

/* $Id$ */

#ifndef ZEND_EXECUTE_H
#define ZEND_EXECUTE_H

#include "zend_compile.h"
#include "zend_hash.h"
#include "zend_variables.h"
#include "zend_operators.h"

typedef union _temp_variable {
zval tmp_var;
struct {
zval **ptr_ptr;
zval *ptr;
zend_bool fcall_returned_reference;
} var;
struct {
zval **ptr_ptr;
zval *ptr;
zend_bool fcall_returned_reference;
zval *str;
zend_uint offset;
} str_offset;
zend_class_entry *class_entry;
} temp_variable;


BEGIN_EXTERN_C()
ZEND_API extern void (*zend_execute)(zend_op_array *op_array TSRMLS_DC);
ZEND_API extern void (*zend_execute_internal)(zend_execute_data *execute_data_ptr, int return_value_used TSRMLS_DC);

void init_executor(TSRMLS_D);
void shutdown_executor(TSRMLS_D);
void shutdown_destructors(TSRMLS_D);
ZEND_API void execute(zend_op_array *op_array TSRMLS_DC);
ZEND_API void execute_internal(zend_execute_data *execute_data_ptr, int return_value_used TSRMLS_DC);
ZEND_API int zend_is_true(zval *op);
#define safe_free_zval_ptr(p) safe_free_zval_ptr_rel(p ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC)
static inline void safe_free_zval_ptr_rel(zval *p ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
{
TSRMLS_FETCH();

if (p!=EG(uninitialized_zval_ptr)) {
FREE_ZVAL_REL(p);
}
}
ZEND_API int zend_lookup_class(char *name, int name_length, zend_class_entry ***ce TSRMLS_DC);
ZEND_API int zend_lookup_class_ex(char *name, int name_length, int use_autoload, zend_class_entry ***ce TSRMLS_DC);
ZEND_API int zend_eval_string(char *str, zval *retval_ptr, char *string_name TSRMLS_DC);
ZEND_API int zend_eval_string_ex(char *str, zval *retval_ptr, char *string_name, int handle_exceptions TSRMLS_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:
if(IS_ZEND_STD_OBJECT(*op)) {
TSRMLS_FETCH();

if (Z_OBJ_HT_P(op)->cast_object) {
zval tmp;
if (Z_OBJ_HT_P(op)->cast_object(op, &tmp, IS_BOOL, 0 TSRMLS_CC) == SUCCESS) {
result = Z_LVAL(tmp);
break;
}
} else if (Z_OBJ_HT_P(op)->get) {
zval *tmp = Z_OBJ_HT_P(op)->get(op TSRMLS_CC);
if(Z_TYPE_P(tmp) != IS_OBJECT) {
/* for safety - avoid loop */
convert_to_boolean(tmp);
result = Z_LVAL_P(tmp);
zval_ptr_dtor(&tmp);
break;
}
}

if(EG(ze1_compatibility_mode)) {
result = (zend_hash_num_elements(Z_OBJPROP_P(op))?1:0);
} else {
result = 1;
}
} else {
result = 1;
}
break;
default:
result = 0;
break;
}
return result;
}

ZEND_API int zval_update_constant(zval **pp, void *arg TSRMLS_DC);

/* dedicated Zend executor functions - do not use! */
static inline void zend_ptr_stack_clear_multiple(TSRMLS_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 TSRMLS_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;
}

void execute_new_code(TSRMLS_D);


/* services */
ZEND_API char *get_active_class_name(char **space TSRMLS_DC);
ZEND_API char *get_active_function_name(TSRMLS_D);
ZEND_API char *zend_get_executed_filename(TSRMLS_D);
ZEND_API uint zend_get_executed_lineno(TSRMLS_D);
ZEND_API zend_bool zend_is_executing(TSRMLS_D);

ZEND_API void zend_set_timeout(long seconds);
ZEND_API void zend_unset_timeout(TSRMLS_D);
ZEND_API void zend_timeout(int dummy);
ZEND_API zend_class_entry *zend_fetch_class(char *class_name, uint class_name_len, int fetch_type TSRMLS_DC);
void zend_verify_abstract_class(zend_class_entry *ce TSRMLS_DC);

#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))

/* The following tries to resolve the classname of a zval of type object.
* Since it is slow it should be only used in error messages.
*/
#define Z_OBJ_CLASS_NAME_P(zval) ((zval) && (zval)->type == IS_OBJECT && Z_OBJ_HT_P(zval)->get_class_entry != NULL && Z_OBJ_HT_P(zval)->get_class_entry(zval TSRMLS_CC) ? Z_OBJ_HT_P(zval)->get_class_entry(zval TSRMLS_CC)->name : "")

ZEND_API zval** zend_get_compiled_variable_value(zend_execute_data *execute_data_ptr, zend_uint var);

#define ZEND_USER_OPCODE_CONTINUE 0 /* execute next opcode */
#define ZEND_USER_OPCODE_RETURN 1 /* exit from executor (return from function) */
#define ZEND_USER_OPCODE_DISPATCH 2 /* call original opcode handler */

#define ZEND_USER_OPCODE_DISPATCH_TO 0x100 /* call original handler of returned opcode */

ZEND_API int zend_set_user_opcode_handler(zend_uchar opcode, opcode_handler_t handler);
ZEND_API opcode_handler_t zend_get_user_opcode_handler(zend_uchar opcode);

/* former zend_execute_locks.h */
typedef struct _zend_free_op {
zval* var;
/* int is_var; */
} zend_free_op;

ZEND_API zval *zend_get_zval_ptr(znode *node, temp_variable *Ts, zend_free_op *should_free, int type TSRMLS_DC);
ZEND_API zval **zend_get_zval_ptr_ptr(znode *node, temp_variable *Ts, zend_free_op *should_free, int type TSRMLS_DC);

ZEND_API int zend_do_fcall(ZEND_OPCODE_HANDLER_ARGS);

END_EXTERN_C()

#endif /* ZEND_EXECUTE_H */

/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* indent-tabs-mode: t
* End:
*/
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