benchtests/bench-memrchr.c

   1 /* Measure memrchr functions.
   2    Copyright (C) 2013-2020 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #define TEST_MAIN
  20 #define TEST_NAME "memrchr"
  21 #include "bench-string.h"
  22
  23 typedef char *(*proto_t) (const char *, int, size_t);
  24 char *simple_memrchr (const char *, int, size_t);
  25
  26 IMPL (simple_memrchr, 0)
  27 IMPL (memrchr, 1)
  28
  29 char *
  30 simple_memrchr (const char *s, int c, size_t n)
  31 {
  32   s = s + n;
  33   while (n--)
  34     if (*--s == (char) c)
  35       return (char *) s;
  36   return NULL;
  37 }
  38
  39 #define USE_AS_MEMRCHR
  40 #include "bench-memchr.c"