root/Zend/zend_ptr_stack.c

DEFINITIONS

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

/*
   +----------------------------------------------------------------------+
   | Zend Engine                                                          |
   +----------------------------------------------------------------------+
   | Copyright (c) 1998-2008 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: zend_ptr_stack.c,v 1.23.2.1.2.2 2007/12/31 07:20:03 sebastian Exp $ */

#include "zend.h"
#include "zend_ptr_stack.h"
#ifdef HAVE_STDARG_H
# include <stdarg.h>
#endif

ZEND_API void zend_ptr_stack_init(zend_ptr_stack *stack)
{
        stack->top_element = stack->elements = (void **) emalloc(sizeof(void *)*PTR_STACK_BLOCK_SIZE);
        stack->max = PTR_STACK_BLOCK_SIZE;
        stack->top = 0;
}


ZEND_API void zend_ptr_stack_n_push(zend_ptr_stack *stack, int count, ...)
{
        va_list ptr;
        void *elem;
        
        ZEND_PTR_STACK_RESIZE_IF_NEEDED(stack, count)

        va_start(ptr, count);
        while (count>0) {
                elem = va_arg(ptr, void *);
                stack->top++;
                *(stack->top_element++) = elem;
                count--;
        }
        va_end(ptr);
}


ZEND_API void zend_ptr_stack_n_pop(zend_ptr_stack *stack, int count, ...)
{
        va_list ptr;
        void **elem;
        
        va_start(ptr, count);
        while (count>0) {
                elem = va_arg(ptr, void **);
                *elem = *(--stack->top_element);
                stack->top--;
                count--;
        }
        va_end(ptr);
}



ZEND_API void zend_ptr_stack_destroy(zend_ptr_stack *stack)
{
        if (stack->elements) {
                efree(stack->elements);
        }
}


ZEND_API void zend_ptr_stack_apply(zend_ptr_stack *stack, void (*func)(void *))
{
        int i = stack->top;

        while (--i >= 0) {
                func(stack->elements[i]);
        }
}


ZEND_API void zend_ptr_stack_clean(zend_ptr_stack *stack, void (*func)(void *), zend_bool free_elements)
{
        zend_ptr_stack_apply(stack, func);
        if (free_elements) {
                int i = stack->top;

                while (--i >= 0) {
                        efree(stack->elements[i]);
                }
        }
        stack->top = 0;
        stack->top_element = stack->elements;
}


ZEND_API int zend_ptr_stack_num_elements(zend_ptr_stack *stack)
{
        return stack->top;
}

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