root/Zend/zend_ptr_stack.c

DEFINITIONS

1. zend_ptr_stack_init_ex
2. zend_ptr_stack_init
3. zend_ptr_stack_n_push
4. zend_ptr_stack_n_pop
5. zend_ptr_stack_destroy
6. zend_ptr_stack_apply
7. zend_ptr_stack_clean
8. zend_ptr_stack_num_elements

   1 /*
   2    +----------------------------------------------------------------------+
   3    | Zend Engine                                                          |
   4    +----------------------------------------------------------------------+
   5    | Copyright (c) 1998-2016 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 /* $Id$ */
  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  * Local variables:
 115  * tab-width: 4
 116  * c-basic-offset: 4
 117  * indent-tabs-mode: t
 118  * End:
 119  */