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-rw-r--r--src/common.c41
1 files changed, 41 insertions, 0 deletions
diff --git a/src/common.c b/src/common.c
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+++ b/src/common.c
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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;
+}