Return to zend_stack.c CVS log

Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / php / Zend

php 5.4.29

    1: /*
    2:    +----------------------------------------------------------------------+
    3:    | Zend Engine                                                          |
    4:    +----------------------------------------------------------------------+
    5:    | Copyright (c) 1998-2014 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_stack.c,v 1.1.1.4 2014/06/15 20:04:04 misho Exp $ */
   21: 
   22: #include "zend.h"
   23: #include "zend_stack.h"
   24: 
   25: ZEND_API int zend_stack_init(zend_stack *stack)
   26: {
   27: 	stack->top = 0;
   28: 	stack->max = 0;
   29: 	stack->elements = NULL;
   30: 	return SUCCESS;
   31: }
   32: 
   33: ZEND_API int zend_stack_push(zend_stack *stack, const void *element, int size)
   34: {
   35: 	if (stack->top >= stack->max) {		/* we need to allocate more memory */
   36: 		stack->elements = (void **) erealloc(stack->elements,
   37: 				   (sizeof(void **) * (stack->max += STACK_BLOCK_SIZE)));
   38: 		if (!stack->elements) {
   39: 			return FAILURE;
   40: 		}
   41: 	}
   42: 	stack->elements[stack->top] = (void *) emalloc(size);
   43: 	memcpy(stack->elements[stack->top], element, size);
   44: 	return stack->top++;
   45: }
   46: 
   47: 
   48: ZEND_API int zend_stack_top(const zend_stack *stack, void **element)
   49: {
   50: 	if (stack->top > 0) {
   51: 		*element = stack->elements[stack->top - 1];
   52: 		return SUCCESS;
   53: 	} else {
   54: 		*element = NULL;
   55: 		return FAILURE;
   56: 	}
   57: }
   58: 
   59: 
   60: ZEND_API int zend_stack_del_top(zend_stack *stack)
   61: {
   62: 	if (stack->top > 0) {
   63: 		efree(stack->elements[--stack->top]);
   64: 	}
   65: 	return SUCCESS;
   66: }
   67: 
   68: 
   69: ZEND_API int zend_stack_int_top(const zend_stack *stack)
   70: {
   71: 	int *e;
   72: 
   73: 	if (zend_stack_top(stack, (void **) &e) == FAILURE) {
   74: 		return FAILURE;			/* this must be a negative number, since negative numbers can't be address numbers */
   75: 	} else {
   76: 		return *e;
   77: 	}
   78: }
   79: 
   80: 
   81: ZEND_API int zend_stack_is_empty(const zend_stack *stack)
   82: {
   83: 	if (stack->top == 0) {
   84: 		return 1;
   85: 	} else {
   86: 		return 0;
   87: 	}
   88: }
   89: 
   90: 
   91: ZEND_API int zend_stack_destroy(zend_stack *stack)
   92: {
   93: 	int i;
   94: 
   95: 	if (stack->elements) {
   96: 		for (i = 0; i < stack->top; i++) {
   97: 			efree(stack->elements[i]);
   98: 		}
   99: 		efree(stack->elements);
  100: 		stack->elements = NULL;
  101: 	}
  102: 
  103: 	return SUCCESS;
  104: }
  105: 
  106: 
  107: ZEND_API void **zend_stack_base(const zend_stack *stack)
  108: {
  109: 	return stack->elements;
  110: }
  111: 
  112: 
  113: ZEND_API int zend_stack_count(const zend_stack *stack)
  114: {
  115: 	return stack->top;
  116: }
  117: 
  118: 
  119: ZEND_API void zend_stack_apply(zend_stack *stack, int type, int (*apply_function)(void *element))
  120: {
  121: 	int i;
  122: 
  123: 	switch (type) {
  124: 		case ZEND_STACK_APPLY_TOPDOWN:
  125: 			for (i=stack->top-1; i>=0; i--) {
  126: 				if (apply_function(stack->elements[i])) {
  127: 					break;
  128: 				}
  129: 			}
  130: 			break;
  131: 		case ZEND_STACK_APPLY_BOTTOMUP:
  132: 			for (i=0; i<stack->top; i++) {
  133: 				if (apply_function(stack->elements[i])) {
  134: 					break;
  135: 				}
  136: 			}
  137: 			break;
  138: 	}
  139: }
  140: 
  141: 
  142: ZEND_API void zend_stack_apply_with_argument(zend_stack *stack, int type, int (*apply_function)(void *element, void *arg), void *arg)
  143: {
  144: 	int i;
  145: 
  146: 	switch (type) {
  147: 		case ZEND_STACK_APPLY_TOPDOWN:
  148: 			for (i=stack->top-1; i>=0; i--) {
  149: 				if (apply_function(stack->elements[i], arg)) {
  150: 					break;
  151: 				}
  152: 			}
  153: 			break;
  154: 		case ZEND_STACK_APPLY_BOTTOMUP:
  155: 			for (i=0; i<stack->top; i++) {
  156: 				if (apply_function(stack->elements[i], arg)) {
  157: 					break;
  158: 				}
  159: 			}
  160: 			break;
  161: 	}
  162: }
  163: 
  164: /*
  165:  * Local variables:
  166:  * tab-width: 4
  167:  * c-basic-offset: 4
  168:  * indent-tabs-mode: t
  169:  * End:
  170:  */