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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_dynamic_array.c,v 1.1.1.2 2012/05/29 12:34:35 misho Exp $ */
   21: 
   22: #include "zend.h"
   23: 
   24: typedef struct _dynamic_array {
   25:         char *array;
   26:         unsigned int element_size;
   27:         unsigned int current;
   28:         unsigned int allocated;
   29: } dynamic_array;
   30: 
   31: ZEND_API int zend_dynamic_array_init(dynamic_array *da, unsigned int element_size, unsigned int size)
   32: {
   33: 	da->element_size = element_size;
   34: 	da->allocated = size;
   35: 	da->current = 0;
   36: 	da->array = (char *) emalloc(size*element_size);
   37: 	if (da->array == NULL) {
   38: 		return 1;
   39: 	}
   40: 	return 0;
   41: }
   42: 
   43: ZEND_API void *zend_dynamic_array_push(dynamic_array *da)
   44: {
   45: 	if (da->current == da->allocated) {
   46: 		da->allocated *= 2;
   47: 		da->array = (char *) erealloc(da->array, da->allocated*da->element_size);
   48: 	}
   49: 	return (void *)(da->array+(da->current++)*da->element_size);
   50: }
   51: 
   52: ZEND_API void *zend_dynamic_array_pop(dynamic_array *da)
   53: {
   54: 	return (void *)(da->array+(--(da->current))*da->element_size);
   55: 
   56: }
   57: 
   58: ZEND_API void *zend_dynamic_array_get_element(dynamic_array *da, unsigned int index)
   59: {
   60: 	if (index >= da->current) {
   61: 		return NULL;
   62: 	}
   63: 	return (void *)(da->array+index*da->element_size);
   64: }
   65: 
   66: /*
   67:  * Local variables:
   68:  * tab-width: 4
   69:  * c-basic-offset: 4
   70:  * indent-tabs-mode: t
   71:  * End:
   72:  */