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
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 */