benchtests/bench-strpbrk.c

   1 /* Measure strpbrk 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 #ifndef STRPBRK_RESULT
  20 # define STRPBRK_RESULT(s, pos) ((s)[(pos)] ? (s) + (pos) : NULL)
  21 # define RES_TYPE char *
  22 # define TEST_MAIN
  23 # define TEST_NAME "strpbrk"
  24 # include "bench-string.h"
  25
  26 typedef char *(*proto_t) (const char *, const char *);
  27 char *simple_strpbrk (const char *, const char *);
  28 char *stupid_strpbrk (const char *, const char *);
  29
  30 IMPL (stupid_strpbrk, 0)
  31 IMPL (simple_strpbrk, 0)
  32 IMPL (strpbrk, 1)
  33
  34 char *
  35 simple_strpbrk (const char *s, const char *rej)
  36 {
  37   const char *r;
  38   char c;
  39
  40   while ((c = *s++) != '\0')
  41     for (r = rej; *r != '\0'; ++r)
  42       if (*r == c)
  43         return (char *) s - 1;
  44   return NULL;
  45 }
  46
  47 char *
  48 stupid_strpbrk (const char *s, const char *rej)
  49 {
  50   size_t ns = strlen (s), nrej = strlen (rej);
  51   size_t i, j;
  52
  53   for (i = 0; i < ns; ++i)
  54     for (j = 0; j < nrej; ++j)
  55       if (s[i] == rej[j])
  56         return (char *) s + i;
  57   return NULL;
  58 }
  59 #endif
  60
  61 static void
  62 do_one_test (impl_t *impl, const char *s, const char *rej, RES_TYPE exp_res)
  63 {
  64   RES_TYPE res = CALL (impl, s, rej);
  65   if (res != exp_res)
  66     {
  67       error (0, 0, "Wrong result in function %s %p %p", impl->name,
  68              (void *) res, (void *) exp_res);
  69       ret = 1;
  70       return;
  71     }
  72
  73   if (HP_TIMING_AVAIL)
  74     {
  75       hp_timing_t start __attribute ((unused));
  76       hp_timing_t stop __attribute ((unused));
  77       hp_timing_t best_time = ~ (hp_timing_t) 0;
  78       size_t i;
  79
  80       for (i = 0; i < 32; ++i)
  81         {
  82           HP_TIMING_NOW (start);
  83           CALL (impl, s, rej);
  84           HP_TIMING_NOW (stop);
  85           HP_TIMING_BEST (best_time, start, stop);
  86         }
  87
  88       printf ("\t%zd", (size_t) best_time);
  89     }
  90 }
  91
  92 static void
  93 do_test (size_t align, size_t pos, size_t len)
  94 {
  95   size_t i;
  96   int c;
  97   RES_TYPE result;
  98   char *rej, *s;
  99
 100   align &= 7;
 101   if (align + pos + 10 >= page_size || len > 240)
 102     return;
 103
 104   rej = (char *) (buf2 + (random () & 255));
 105   s = (char *) (buf1 + align);
 106
 107   for (i = 0; i < len; ++i)
 108     {
 109       rej[i] = random () & 255;
 110       if (!rej[i])
 111         rej[i] = random () & 255;
 112       if (!rej[i])
 113         rej[i] = 1 + (random () & 127);
 114     }
 115   rej[len] = '\0';
 116   for (c = 1; c <= 255; ++c)
 117     if (strchr (rej, c) == NULL)
 118       break;
 119
 120   for (i = 0; i < pos; ++i)
 121     {
 122       s[i] = random () & 255;
 123       if (strchr (rej, s[i]))
 124         {
 125           s[i] = random () & 255;
 126           if (strchr (rej, s[i]))
 127             s[i] = c;
 128         }
 129     }
 130   s[pos] = rej[random () % (len + 1)];
 131   if (s[pos])
 132     {
 133       for (i = pos + 1; i < pos + 10; ++i)
 134         s[i] = random () & 255;
 135       s[i] = '\0';
 136     }
 137   result = STRPBRK_RESULT (s, pos);
 138
 139   if (HP_TIMING_AVAIL)
 140     printf ("Length %4zd, alignment %2zd, rej len %2zd:", pos, align, len);
 141
 142   FOR_EACH_IMPL (impl, 0)
 143     do_one_test (impl, s, rej, result);
 144
 145   if (HP_TIMING_AVAIL)
 146     putchar ('\n');
 147 }
 148
 149 int
 150 test_main (void)
 151 {
 152   size_t i;
 153
 154   test_init ();
 155
 156   printf ("%32s", "");
 157   FOR_EACH_IMPL (impl, 0)
 158     printf ("\t%s", impl->name);
 159   putchar ('\n');
 160
 161   for (i = 0; i < 32; ++i)
 162     {
 163       do_test (0, 512, i);
 164       do_test (i, 512, i);
 165     }
 166
 167   for (i = 1; i < 8; ++i)
 168     {
 169       do_test (0, 16 << i, 4);
 170       do_test (i, 16 << i, 4);
 171     }
 172
 173   for (i = 1; i < 8; ++i)
 174     do_test (i, 64, 10);
 175
 176   for (i = 0; i < 64; ++i)
 177     do_test (0, i, 6);
 178
 179   return ret;
 180 }
 181
 182 #include "../test-skeleton.c"