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    1: /*
    2:    +----------------------------------------------------------------------+
    3:    | Zend Engine                                                          |
    4:    +----------------------------------------------------------------------+
    5:    | Copyright (c) 1998-2012 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@zend.com>                                |
   16:    |          Zeev Suraski <zeev@zend.com>                                |
   17:    +----------------------------------------------------------------------+
   18: */
   19: 
   20: /* $Id: zend_ptr_stack.c,v 1.1.1.2 2012/05/29 12:34:36 misho Exp $ */
   21: 
   22: #include "zend.h"
   23: #include "zend_ptr_stack.h"
   24: #ifdef HAVE_STDARG_H
   25: # include <stdarg.h>
   26: #endif
   27: 
   28: ZEND_API void zend_ptr_stack_init_ex(zend_ptr_stack *stack, zend_bool persistent)
   29: {
   30: 	stack->top_element = stack->elements = NULL;
   31: 	stack->top = stack->max = 0;
   32: 	stack->persistent = persistent;
   33: }
   34: 
   35: ZEND_API void zend_ptr_stack_init(zend_ptr_stack *stack)
   36: {
   37: 	zend_ptr_stack_init_ex(stack, 0);
   38: }
   39: 
   40: 
   41: ZEND_API void zend_ptr_stack_n_push(zend_ptr_stack *stack, int count, ...)
   42: {
   43: 	va_list ptr;
   44: 	void *elem;
   45: 	
   46: 	ZEND_PTR_STACK_RESIZE_IF_NEEDED(stack, count)
   47: 
   48: 	va_start(ptr, count);
   49: 	while (count>0) {
   50: 		elem = va_arg(ptr, void *);
   51: 		stack->top++;
   52: 		*(stack->top_element++) = elem;
   53: 		count--;
   54: 	}
   55: 	va_end(ptr);
   56: }
   57: 
   58: 
   59: ZEND_API void zend_ptr_stack_n_pop(zend_ptr_stack *stack, int count, ...)
   60: {
   61: 	va_list ptr;
   62: 	void **elem;
   63: 	
   64: 	va_start(ptr, count);
   65: 	while (count>0) {
   66: 		elem = va_arg(ptr, void **);
   67: 		*elem = *(--stack->top_element);
   68: 		stack->top--;
   69: 		count--;
   70: 	}
   71: 	va_end(ptr);
   72: }
   73: 
   74: 
   75: 
   76: ZEND_API void zend_ptr_stack_destroy(zend_ptr_stack *stack)
   77: {
   78: 	if (stack->elements) {
   79: 		pefree(stack->elements, stack->persistent);
   80: 	}
   81: }
   82: 
   83: 
   84: ZEND_API void zend_ptr_stack_apply(zend_ptr_stack *stack, void (*func)(void *))
   85: {
   86: 	int i = stack->top;
   87: 
   88: 	while (--i >= 0) {
   89: 		func(stack->elements[i]);
   90: 	}
   91: }
   92: 
   93: 
   94: ZEND_API void zend_ptr_stack_clean(zend_ptr_stack *stack, void (*func)(void *), zend_bool free_elements)
   95: {
   96: 	zend_ptr_stack_apply(stack, func);
   97: 	if (free_elements) {
   98: 		int i = stack->top;
   99: 
  100: 		while (--i >= 0) {
  101: 			pefree(stack->elements[i], stack->persistent);
  102: 		}
  103: 	}
  104: 	stack->top = 0;
  105: 	stack->top_element = stack->elements;
  106: }
  107: 
  108: 
  109: ZEND_API int zend_ptr_stack_num_elements(zend_ptr_stack *stack)
  110: {
  111: 	return stack->top;
  112: }
  113: 
  114: /*
  115:  * Local variables:
  116:  * tab-width: 4
  117:  * c-basic-offset: 4
  118:  * indent-tabs-mode: t
  119:  * End:
  120:  */