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/* common.c - Alpine Package Keeper (APK)
*
* Copyright (C) 2010 Timo Teräs <timo.teras@iki.fi>
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation. See http://www.gnu.org/ for details.
*/
#include <malloc.h>
#include <string.h>
#include "apk_defines.h"
static int *dummy_array = 0;
void *apk_array_resize(void *array, size_t new_size, size_t elem_size)
{
int old_size, diff;
void *tmp;
if (new_size == 0) {
if (array != &dummy_array)
free(array);
return &dummy_array;
}
old_size = array ? *((int*) array) : 0;
diff = new_size - old_size;
if (array == &dummy_array)
array = NULL;
tmp = realloc(array, sizeof(int) + new_size * elem_size);
if (diff > 0)
memset(tmp + sizeof(int) + old_size * elem_size, 0,
diff * elem_size);
*((int*) tmp) = new_size;
return tmp;
}
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