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zend_dynamic_array.c

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/*

+----------------------------------------------------------------------+

| Zend Engine |

+----------------------------------------------------------------------+

| Copyright (c) 1998-2013 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> |

+----------------------------------------------------------------------+

*/

/* $Id$ */

#include "zend.h"

typedef struct _dynamic_array {

char *array;

unsigned int element_size;

unsigned int current;

unsigned int allocated;

} dynamic_array;

ZEND_API int zend_dynamic_array_init(dynamic_array *da, unsigned int element_size, unsigned int size)

{

da->element_size = element_size;

da->allocated = size;

da->current = 0;

da->array = (char *) emalloc(size*element_size);

if (da->array == NULL) {

return 1;

}

return 0;

}

ZEND_API void *zend_dynamic_array_push(dynamic_array *da)

{

if (da->current == da->allocated) {

da->allocated *= 2;

da->array = (char *) erealloc(da->array, da->allocated*da->element_size);

}

return (void *)(da->array+(da->current++)*da->element_size);

}

ZEND_API void *zend_dynamic_array_pop(dynamic_array *da)

{

return (void *)(da->array+(--(da->current))*da->element_size);

}

ZEND_API void *zend_dynamic_array_get_element(dynamic_array *da, unsigned int index)

{

if (index >= da->current) {

return NULL;

}

return (void *)(da->array+index*da->element_size);

}

/*

* Local variables:

* tab-width: 4

* c-basic-offset: 4

* indent-tabs-mode: t

* End:

*/