avl-cmp.c

   1 /*
   2  * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16 #include <string.h>
  17 #include "avl-cmp.h"
  18 #include "blob.h"
  19
  20 static inline int _min(int v1, int v2)
  21 {
  22         return v1 < v2 ? v1 : v2;
  23 }
  24
  25 int
  26 avl_strcmp(const void *k1, const void *k2, void *ptr)
  27 {
  28         return strcmp(k1, k2);
  29 }
  30
  31 int
  32 avl_blobcmp(const void *k1, const void *k2, void *ptr)
  33 {
  34         int len = _min(blob_raw_len(k1), blob_raw_len(k2));
  35
  36         return memcmp(k1, k2, len);
  37 }