<h2>Editing File: /opt/alt/php82/usr/include/php/Zend/zend_ptr_stack.h</h2><form method='post'><textarea name='content' class='file-edit'>/*
   +----------------------------------------------------------------------+
   | Zend Engine                                                          |
   +----------------------------------------------------------------------+
   | Copyright (c) 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 &lt;andi@php.net&gt;                                 |
   |          Zeev Suraski &lt;zeev@php.net&gt;                                 |
   +----------------------------------------------------------------------+
*/

#ifndef ZEND_PTR_STACK_H
#define ZEND_PTR_STACK_H

typedef struct _zend_ptr_stack {
	int top, max;
	void **elements;
	void **top_element;
	bool persistent;
} zend_ptr_stack;


#define PTR_STACK_BLOCK_SIZE 64

BEGIN_EXTERN_C()
ZEND_API void zend_ptr_stack_init(zend_ptr_stack *stack);
ZEND_API void zend_ptr_stack_init_ex(zend_ptr_stack *stack, bool persistent);
ZEND_API void zend_ptr_stack_n_push(zend_ptr_stack *stack, int count, ...);
ZEND_API void zend_ptr_stack_n_pop(zend_ptr_stack *stack, int count, ...);
ZEND_API void zend_ptr_stack_destroy(zend_ptr_stack *stack);
ZEND_API void zend_ptr_stack_apply(zend_ptr_stack *stack, void (*func)(void *));
ZEND_API void zend_ptr_stack_reverse_apply(zend_ptr_stack *stack, void (*func)(void *));
ZEND_API void zend_ptr_stack_clean(zend_ptr_stack *stack, void (*func)(void *), bool free_elements);
ZEND_API int zend_ptr_stack_num_elements(zend_ptr_stack *stack);
END_EXTERN_C()

#define ZEND_PTR_STACK_RESIZE_IF_NEEDED(stack, count)		\
	if (stack-&gt;top+count &gt; stack-&gt;max) {					\
		/* we need to allocate more memory */				\
		do {												\
			stack-&gt;max += PTR_STACK_BLOCK_SIZE;				\
		} while (stack-&gt;top+count &gt; stack-&gt;max);			\
		stack-&gt;elements = (void **) safe_perealloc(stack-&gt;elements, sizeof(void *), (stack-&gt;max), 0, stack-&gt;persistent);	\
		stack-&gt;top_element = stack-&gt;elements+stack-&gt;top;	\
	}

/*	Not doing this with a macro because of the loop unrolling in the element assignment.
	Just using a macro for 3 in the body for readability sake. */
static zend_always_inline void zend_ptr_stack_3_push(zend_ptr_stack *stack, void *a, void *b, void *c)
{
#define ZEND_PTR_STACK_NUM_ARGS 3

	ZEND_PTR_STACK_RESIZE_IF_NEEDED(stack, ZEND_PTR_STACK_NUM_ARGS)

	stack-&gt;top += ZEND_PTR_STACK_NUM_ARGS;
	*(stack-&gt;top_element++) = a;
	*(stack-&gt;top_element++) = b;
	*(stack-&gt;top_element++) = c;

#undef ZEND_PTR_STACK_NUM_ARGS
}

static zend_always_inline void zend_ptr_stack_2_push(zend_ptr_stack *stack, void *a, void *b)
{
#define ZEND_PTR_STACK_NUM_ARGS 2

	ZEND_PTR_STACK_RESIZE_IF_NEEDED(stack, ZEND_PTR_STACK_NUM_ARGS)

	stack-&gt;top += ZEND_PTR_STACK_NUM_ARGS;
	*(stack-&gt;top_element++) = a;
	*(stack-&gt;top_element++) = b;

#undef ZEND_PTR_STACK_NUM_ARGS
}

static zend_always_inline void zend_ptr_stack_3_pop(zend_ptr_stack *stack, void **a, void **b, void **c)
{
	*a = *(--stack-&gt;top_element);
	*b = *(--stack-&gt;top_element);
	*c = *(--stack-&gt;top_element);
	stack-&gt;top -= 3;
}

static zend_always_inline void zend_ptr_stack_2_pop(zend_ptr_stack *stack, void **a, void **b)
{
	*a = *(--stack-&gt;top_element);
	*b = *(--stack-&gt;top_element);
	stack-&gt;top -= 2;
}

static zend_always_inline void zend_ptr_stack_push(zend_ptr_stack *stack, void *ptr)
{
	ZEND_PTR_STACK_RESIZE_IF_NEEDED(stack, 1)

	stack-&gt;top++;
	*(stack-&gt;top_element++) = ptr;
}

static zend_always_inline void *zend_ptr_stack_pop(zend_ptr_stack *stack)
{
	stack-&gt;top--;
	return *(--stack-&gt;top_element);
}

static zend_always_inline void *zend_ptr_stack_top(zend_ptr_stack *stack)
{
    return stack-&gt;elements[stack-&gt;top - 1];
}

#endif /* ZEND_PTR_STACK_H */
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