benchtests/bench-strtok.c

   1 /* Measure strtok functions.
   2    Copyright (C) 2013-2014 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 TEST_MAIN
  20 #define TEST_NAME "strtok"
  21 #include "bench-string.h"
  22
  23 char *
  24 simple_strtok (char *s1, char *s2)
  25 {
  26   static char *saveptr;
  27   char *token;
  28   ssize_t i = 0, j = 0;
  29   int found = 0;
  30   size_t s2len = strlen (s2);
  31
  32   if (s1 == NULL)
  33     s1 = saveptr;
  34   if (s1 == NULL || *s1 == '\0')
  35     return NULL;
  36
  37   while (!found)
  38     {
  39       if (s1[i] == '\0')
  40         {
  41           saveptr = NULL;
  42           return NULL;
  43         }
  44       for (j = 0; j < s2len; j++)
  45         {
  46           if (s1[i] == s2[j])
  47             {
  48               i++;
  49               found = 0;
  50               break;
  51             }
  52           found = 1;
  53         }
  54     }
  55   token = s1 + i;
  56   i++;
  57   found = 0;
  58   while (!found)
  59     {
  60       if (s1[i] == '\0')
  61         {
  62           saveptr = NULL;
  63           return token;
  64         }
  65       for (j = 0; j < s2len; j++)
  66         {
  67           if (s1[i] == s2[j])
  68             {
  69               found = 1;
  70               break;
  71             }
  72         }
  73       i++;
  74     }
  75   s1[i - 1] = '\0';
  76   saveptr = s1 + i;
  77   return token;
  78 }
  79
  80 typedef char *(*proto_t) (const char *, const char *);
  81
  82 IMPL (simple_strtok, 0)
  83 IMPL (strtok, 1)
  84
  85 static void
  86 do_one_test (impl_t * impl, const char *s1, const char *s2)
  87 {
  88   size_t i, iters = INNER_LOOP_ITERS;
  89   timing_t start, stop, cur;
  90   TIMING_NOW (start);
  91   for (i = 0; i < iters; ++i)
  92     {
  93       CALL (impl, s1, s2);
  94       CALL (impl, NULL, s2);
  95       CALL (impl, NULL, s2);
  96     }
  97   TIMING_NOW (stop);
  98
  99   TIMING_DIFF (cur, start, stop);
 100
 101   TIMING_PRINT_MEAN ((double) cur, (double) iters);
 102
 103 }
 104
 105
 106 static void
 107 do_test (size_t align1, size_t align2, size_t len1, size_t len2, int fail)
 108 {
 109   char *s2 = (char *) (buf2 + align2);
 110   static const char d[] = "1234567890abcdef";
 111 #define dl (sizeof (d) - 1)
 112   char *ss2 = s2;
 113   for (size_t l = len2; l > 0; l = l > dl ? l - dl : 0)
 114     {
 115       size_t t = l > dl ? dl : l;
 116       ss2 = mempcpy (ss2, d, t);
 117     }
 118   s2[len2] = '\0';
 119
 120   printf ("Length %4zd/%zd, alignment %2zd/%2zd, %s:",
 121           len1, len2, align1, align2, fail ? "fail" : "found");
 122
 123   FOR_EACH_IMPL (impl, 0)
 124   {
 125     char *s1 = (char *) (buf1 + align1);
 126     if (fail)
 127       {
 128         char *ss1 = s1;
 129         for (size_t l = len1; l > 0; l = l > dl ? l - dl : 0)
 130           {
 131             size_t t = l > dl ? dl : l;
 132             memcpy (ss1, d, t);
 133             ++ss1[len2 > 7 ? 7 : len2 - 1];
 134             ss1 += t;
 135           }
 136       }
 137     else
 138       {
 139         memset (s1, '0', len1);
 140         memcpy (s1 + (len1 - len2) - 2, s2, len2);
 141         if ((len1 / len2) > 4)
 142           memcpy (s1 + (len1 - len2) - (3 * len2), s2, len2);
 143       }
 144     s1[len1] = '\0';
 145     do_one_test (impl, s1, s2);
 146   }
 147   putchar ('\n');
 148 }
 149
 150 static int
 151 test_main (void)
 152 {
 153   test_init ();
 154
 155   printf ("%23s", "");
 156   FOR_EACH_IMPL (impl, 0)
 157     printf ("\t%s", impl->name);
 158   putchar ('\n');
 159
 160   for (size_t klen = 2; klen < 32; ++klen)
 161     for (size_t hlen = 2 * klen; hlen < 16 * klen; hlen += klen)
 162       {
 163         do_test (0, 0, hlen, klen, 0);
 164         do_test (0, 0, hlen, klen, 1);
 165         do_test (0, 3, hlen, klen, 0);
 166         do_test (0, 3, hlen, klen, 1);
 167         do_test (0, 9, hlen, klen, 0);
 168         do_test (0, 9, hlen, klen, 1);
 169         do_test (0, 15, hlen, klen, 0);
 170         do_test (0, 15, hlen, klen, 1);
 171
 172         do_test (3, 0, hlen, klen, 0);
 173         do_test (3, 0, hlen, klen, 1);
 174         do_test (3, 3, hlen, klen, 0);
 175         do_test (3, 3, hlen, klen, 1);
 176         do_test (3, 9, hlen, klen, 0);
 177         do_test (3, 9, hlen, klen, 1);
 178         do_test (3, 15, hlen, klen, 0);
 179         do_test (3, 15, hlen, klen, 1);
 180
 181         do_test (9, 0, hlen, klen, 0);
 182         do_test (9, 0, hlen, klen, 1);
 183         do_test (9, 3, hlen, klen, 0);
 184         do_test (9, 3, hlen, klen, 1);
 185         do_test (9, 9, hlen, klen, 0);
 186         do_test (9, 9, hlen, klen, 1);
 187         do_test (9, 15, hlen, klen, 0);
 188         do_test (9, 15, hlen, klen, 1);
 189
 190         do_test (15, 0, hlen, klen, 0);
 191         do_test (15, 0, hlen, klen, 1);
 192         do_test (15, 3, hlen, klen, 0);
 193         do_test (15, 3, hlen, klen, 1);
 194         do_test (15, 9, hlen, klen, 0);
 195         do_test (15, 9, hlen, klen, 1);
 196         do_test (15, 15, hlen, klen, 0);
 197         do_test (15, 15, hlen, klen, 1);
 198       }
 199   do_test (0, 0, page_size - 1, 16, 0);
 200   do_test (0, 0, page_size - 1, 16, 1);
 201
 202   return ret;
 203 }
 204
 205 #include "../test-skeleton.c"