lib/memcmp2.c

   1 /* Compare two memory areas with possibly different lengths.
   2    Copyright (C) 2009-2019 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify it
   5    under the terms of the GNU Lesser General Public License as published
   6    by the Free Software Foundation; either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 #include <config.h>
  18
  19 /* Specification.  */
  20 #include "memcmp2.h"
  21
  22 #include <string.h>
  23
  24 int
  25 memcmp2 (const char *s1, size_t n1, const char *s2, size_t n2)
  26 {
  27   int cmp = memcmp (s1, s2, n1 <= n2 ? n1 : n2);
  28   if (cmp == 0)
  29     {
  30       if (n1 < n2)
  31         cmp = -1;
  32       else if (n1 > n2)
  33         cmp = 1;
  34     }
  35   return cmp;
  36 }