benchtests/bench-stpncpy.c

   1 /* Measure stpncpy functions.
   2    Copyright (C) 2013-2019 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    <http://www.gnu.org/licenses/>.  */
  18
  19 #define STRNCPY_RESULT(dst, len, n) ((dst) + ((len) > (n) ? (n) : (len)))
  20 #define TEST_MAIN
  21 #ifndef WIDE
  22 # define TEST_NAME "stpncpy"
  23 #else
  24 # define TEST_NAME "wcpncpy"
  25 #endif /* WIDE */
  26 #include "bench-string.h"
  27 #ifndef WIDE
  28 # define SIMPLE_STPNCPY simple_stpncpy
  29 # define STUPID_STPNCPY stupid_stpncpy
  30 #else
  31 # define SIMPLE_STPNCPY simple_wcpncpy
  32 # define STUPID_STPNCPY stupid_wcpncpy
  33 #endif /* WIDE */
  34
  35 CHAR *SIMPLE_STPNCPY (CHAR *, const CHAR *, size_t);
  36 CHAR *STUPID_STPNCPY (CHAR *, const CHAR *, size_t);
  37
  38 IMPL (STUPID_STPNCPY, 0)
  39 IMPL (SIMPLE_STPNCPY, 0)
  40 IMPL (STPNCPY, 1)
  41
  42 CHAR *
  43 SIMPLE_STPNCPY (CHAR *dst, const CHAR *src, size_t n)
  44 {
  45   while (n--)
  46     if ((*dst++ = *src++) == '\0')
  47       {
  48         size_t i;
  49
  50         for (i = 0; i < n; ++i)
  51           dst[i] = '\0';
  52         return dst - 1;
  53       }
  54   return dst;
  55 }
  56
  57 CHAR *
  58 STUPID_STPNCPY (CHAR *dst, const CHAR *src, size_t n)
  59 {
  60   size_t nc = STRNLEN (src, n);
  61   size_t i;
  62
  63   for (i = 0; i < nc; ++i)
  64     dst[i] = src[i];
  65   for (; i < n; ++i)
  66     dst[i] = '\0';
  67   return dst + nc;
  68 }
  69
  70 #include "bench-strncpy.c"