string/test-strstr.c

   1 /* Test and measure strstr functions.
   2    Copyright (C) 2010 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Written by Ulrich Drepper <drepper@redhat.com>, 2010.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #define TEST_MAIN
  22 #include "test-string.h"
  23
  24
  25 #define STRSTR simple_strstr
  26 #include "strstr.c"
  27
  28
  29 static char *
  30 stupid_strstr (const char *s1, const char *s2)
  31 {
  32   ssize_t s1len = strlen (s1);
  33   ssize_t s2len = strlen (s2);
  34
  35   if (s2len > s1len)
  36     return NULL;
  37
  38   for (ssize_t i = 0; i <= s1len - s2len; ++i)
  39     {
  40       size_t j;
  41       for (j = 0; j < s2len; ++j)
  42         if (s1[i + j] != s2[j])
  43           break;
  44       if (j == s2len)
  45         return (char *) s1 + i;
  46     }
  47
  48   return NULL;
  49 }
  50
  51
  52 typedef char *(*proto_t) (const char *, const char *);
  53
  54 IMPL (stupid_strstr, 0)
  55 IMPL (simple_strstr, 0)
  56 IMPL (strstr, 1)
  57
  58
  59 static void
  60 do_one_test (impl_t *impl, const char *s1, const char *s2, char *exp_result)
  61 {
  62   char *result = CALL (impl, s1, s2);
  63   if (result != exp_result)
  64     {
  65       error (0, 0, "Wrong result in function %s %s %s", impl->name,
  66              result, exp_result);
  67       ret = 1;
  68       return;
  69     }
  70
  71   if (HP_TIMING_AVAIL)
  72     {
  73       hp_timing_t start __attribute ((unused));
  74       hp_timing_t stop __attribute ((unused));
  75       hp_timing_t best_time = ~(hp_timing_t) 0;
  76       size_t i;
  77
  78       for (i = 0; i < 32; ++i)
  79         {
  80           HP_TIMING_NOW (start);
  81           CALL (impl, s1, s2);
  82           HP_TIMING_NOW (stop);
  83           HP_TIMING_BEST (best_time, start, stop);
  84         }
  85
  86       printf ("\t%zd", (size_t) best_time);
  87     }
  88 }
  89
  90
  91 static void
  92 do_test (size_t align1, size_t align2, size_t len1, size_t len2,
  93          int fail)
  94 {
  95   char *s1 = (char *) (buf1 + align1);
  96   char *s2 = (char *) (buf2 + align2);
  97
  98   static const char d[] = "1234567890abcdef";
  99 #define dl (sizeof (d) - 1)
 100   char *ss2 = s2;
 101   for (size_t l = len2; l > 0; l = l > dl ? l - dl : 0)
 102     {
 103       size_t t = l > dl ? dl : l;
 104       ss2 = mempcpy (ss2, d, t);
 105     }
 106   s2[len2] = '\0';
 107
 108   if (fail)
 109     {
 110       char *ss1 = s1;
 111       for (size_t l = len1; l > 0; l = l > dl ? l - dl : 0)
 112         {
 113           size_t t = l > dl ? dl : l;
 114           memcpy (ss1, d, t);
 115           ++ss1[len2 > 7 ? 7 : len2 - 1];
 116           ss1 += t;
 117         }
 118     }
 119   else
 120     {
 121       memset (s1, '0', len1);
 122       memcpy (s1 + len1 - len2, s2, len2);
 123     }
 124   s1[len1] = '\0';
 125
 126   if (HP_TIMING_AVAIL)
 127     printf ("Length %4zd/%zd, alignment %2zd/%2zd, %s:",
 128             len1, len2, align1, align2, fail ? "fail" : "found");
 129
 130   FOR_EACH_IMPL (impl, 0)
 131     do_one_test (impl, s1, s2, fail ? NULL : s1 + len1 - len2);
 132
 133   if (HP_TIMING_AVAIL)
 134     putchar ('\n');
 135 }
 136
 137
 138 static int
 139 test_main (void)
 140 {
 141   test_init ();
 142
 143   printf ("%23s", "");
 144   FOR_EACH_IMPL (impl, 0)
 145     printf ("\t%s", impl->name);
 146   putchar ('\n');
 147
 148   for (size_t klen = 2; klen < 32; ++klen)
 149     for (size_t hlen = 2 * klen; hlen < 16 * klen; hlen += klen)
 150       {
 151         do_test (0, 0, hlen, klen, 0);
 152         do_test (0, 0, hlen, klen, 1);
 153         do_test (0, 3, hlen, klen, 0);
 154         do_test (0, 3, hlen, klen, 1);
 155         do_test (0, 9, hlen, klen, 0);
 156         do_test (0, 9, hlen, klen, 1);
 157         do_test (0, 15, hlen, klen, 0);
 158         do_test (0, 15, hlen, klen, 1);
 159
 160         do_test (3, 0, hlen, klen, 0);
 161         do_test (3, 0, hlen, klen, 1);
 162         do_test (3, 3, hlen, klen, 0);
 163         do_test (3, 3, hlen, klen, 1);
 164         do_test (3, 9, hlen, klen, 0);
 165         do_test (3, 9, hlen, klen, 1);
 166         do_test (3, 15, hlen, klen, 0);
 167         do_test (3, 15, hlen, klen, 1);
 168
 169         do_test (9, 0, hlen, klen, 0);
 170         do_test (9, 0, hlen, klen, 1);
 171         do_test (9, 3, hlen, klen, 0);
 172         do_test (9, 3, hlen, klen, 1);
 173         do_test (9, 9, hlen, klen, 0);
 174         do_test (9, 9, hlen, klen, 1);
 175         do_test (9, 15, hlen, klen, 0);
 176         do_test (9, 15, hlen, klen, 1);
 177
 178         do_test (15, 0, hlen, klen, 0);
 179         do_test (15, 0, hlen, klen, 1);
 180         do_test (15, 3, hlen, klen, 0);
 181         do_test (15, 3, hlen, klen, 1);
 182         do_test (15, 9, hlen, klen, 0);
 183         do_test (15, 9, hlen, klen, 1);
 184         do_test (15, 15, hlen, klen, 0);
 185         do_test (15, 15, hlen, klen, 1);
 186       }
 187
 188   do_test (0, 0, page_size - 1, 16, 0);
 189   do_test (0, 0, page_size - 1, 16, 1);
 190
 191   return ret;
 192 }
 193
 194 #include "../test-skeleton.c"