benchtests/bench-strspn.c

   1 /* Measure strspn functions.
   2    Copyright (C) 2013 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 "strspn"
  21 #include "bench-string.h"
  22
  23 typedef size_t (*proto_t) (const char *, const char *);
  24 size_t simple_strspn (const char *, const char *);
  25 size_t stupid_strspn (const char *, const char *);
  26
  27 IMPL (stupid_strspn, 0)
  28 IMPL (simple_strspn, 0)
  29 IMPL (strspn, 1)
  30
  31 size_t
  32 simple_strspn (const char *s, const char *acc)
  33 {
  34   const char *r, *str = s;
  35   char c;
  36
  37   while ((c = *s++) != '\0')
  38     {
  39       for (r = acc; *r != '\0'; ++r)
  40         if (*r == c)
  41           break;
  42       if (*r == '\0')
  43         return s - str - 1;
  44     }
  45   return s - str - 1;
  46 }
  47
  48 size_t
  49 stupid_strspn (const char *s, const char *acc)
  50 {
  51   size_t ns = strlen (s), nacc = strlen (acc);
  52   size_t i, j;
  53
  54   for (i = 0; i < ns; ++i)
  55     {
  56       for (j = 0; j < nacc; ++j)
  57         if (s[i] == acc[j])
  58           break;
  59       if (j == nacc)
  60         return i;
  61     }
  62   return i;
  63 }
  64
  65 static void
  66 do_one_test (impl_t *impl, const char *s, const char *acc, size_t exp_res)
  67 {
  68   size_t res = CALL (impl, s, acc);
  69   if (res != exp_res)
  70     {
  71       error (0, 0, "Wrong result in function %s %p %p", impl->name,
  72              (void *) res, (void *) exp_res);
  73       ret = 1;
  74       return;
  75     }
  76
  77   if (HP_TIMING_AVAIL)
  78     {
  79       hp_timing_t start __attribute ((unused));
  80       hp_timing_t stop __attribute ((unused));
  81       hp_timing_t best_time = ~ (hp_timing_t) 0;
  82       size_t i;
  83
  84       for (i = 0; i < 32; ++i)
  85         {
  86           HP_TIMING_NOW (start);
  87           CALL (impl, s, acc);
  88           HP_TIMING_NOW (stop);
  89           HP_TIMING_BEST (best_time, start, stop);
  90         }
  91
  92       printf ("\t%zd", (size_t) best_time);
  93     }
  94 }
  95
  96 static void
  97 do_test (size_t align, size_t pos, size_t len)
  98 {
  99   size_t i;
 100   char *acc, *s;
 101
 102   align &= 7;
 103   if (align + pos + 10 >= page_size || len > 240 || ! len)
 104     return;
 105
 106   acc = (char *) (buf2 + (random () & 255));
 107   s = (char *) (buf1 + align);
 108
 109   for (i = 0; i < len; ++i)
 110     {
 111       acc[i] = random () & 255;
 112       if (!acc[i])
 113         acc[i] = random () & 255;
 114       if (!acc[i])
 115         acc[i] = 1 + (random () & 127);
 116     }
 117   acc[len] = '\0';
 118
 119   for (i = 0; i < pos; ++i)
 120     s[i] = acc[random () % len];
 121   s[pos] = random () & 255;
 122   if (strchr (acc, s[pos]))
 123     s[pos] = '\0';
 124   else
 125     {
 126       for (i = pos + 1; i < pos + 10; ++i)
 127         s[i] = random () & 255;
 128       s[i] = '\0';
 129     }
 130
 131   if (HP_TIMING_AVAIL)
 132     printf ("Length %4zd, alignment %2zd, acc len %2zd:", pos, align, len);
 133
 134   FOR_EACH_IMPL (impl, 0)
 135     do_one_test (impl, s, acc, pos);
 136
 137   if (HP_TIMING_AVAIL)
 138     putchar ('\n');
 139 }
 140
 141 int
 142 test_main (void)
 143 {
 144   size_t i;
 145
 146   test_init ();
 147
 148   printf ("%32s", "");
 149   FOR_EACH_IMPL (impl, 0)
 150     printf ("\t%s", impl->name);
 151   putchar ('\n');
 152
 153   for (i = 0; i < 32; ++i)
 154     {
 155       do_test (0, 512, i);
 156       do_test (i, 512, i);
 157     }
 158
 159   for (i = 1; i < 8; ++i)
 160     {
 161       do_test (0, 16 << i, 4);
 162       do_test (i, 16 << i, 4);
 163     }
 164
 165   for (i = 1; i < 8; ++i)
 166     do_test (i, 64, 10);
 167
 168   for (i = 0; i < 64; ++i)
 169     do_test (0, i, 6);
 170
 171   return ret;
 172 }
 173
 174 #include "../test-skeleton.c"