string/test-strcasestr.c

   1 /* Test and measure strcasestr 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 STRCASESTR simple_strcasestr
  26 #define NO_ALIAS
  27 #define __strncasecmp strncasecmp
  28 #include "strcasestr.c"
  29
  30
  31 static char *
  32 stupid_strcasestr (const char *s1, const char *s2)
  33 {
  34   ssize_t s1len = strlen (s1);
  35   ssize_t s2len = strlen (s2);
  36
  37   if (s2len > s1len)
  38     return NULL;
  39
  40   for (ssize_t i = 0; i <= s1len - s2len; ++i)
  41     {
  42       size_t j;
  43       for (j = 0; j < s2len; ++j)
  44         if (tolower (s1[i + j]) != tolower (s2[j]))
  45           break;
  46       if (j == s2len)
  47         return (char *) s1 + i;
  48     }
  49
  50   return NULL;
  51 }
  52
  53
  54 typedef char *(*proto_t) (const char *, const char *);
  55
  56 IMPL (stupid_strcasestr, 0)
  57 IMPL (simple_strcasestr, 0)
  58 IMPL (strcasestr, 1)
  59
  60
  61 static void
  62 do_one_test (impl_t *impl, const char *s1, const char *s2, char *exp_result)
  63 {
  64   char *result = CALL (impl, s1, s2);
  65   if (result != exp_result)
  66     {
  67       error (0, 0, "Wrong result in function %s %s %s", impl->name,
  68              result, exp_result);
  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, s1, s2);
  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
  93 static void
  94 do_test (size_t align1, size_t align2, size_t len1, size_t len2,
  95          int fail)
  96 {
  97   char *s1 = (char *) (buf1 + align1);
  98   char *s2 = (char *) (buf2 + align2);
  99
 100   static const char d[] = "1234567890abcxyz";
 101 #define dl (sizeof (d) - 1)
 102   char *ss2 = s2;
 103   for (size_t l = len2; l > 0; l = l > dl ? l - dl : 0)
 104     {
 105       size_t t = l > dl ? dl : l;
 106       ss2 = mempcpy (ss2, d, t);
 107     }
 108   s2[len2] = '\0';
 109
 110   if (fail)
 111     {
 112       char *ss1 = s1;
 113       for (size_t l = len1; l > 0; l = l > dl ? l - dl : 0)
 114         {
 115           size_t t = l > dl ? dl : l;
 116           memcpy (ss1, d, t);
 117           ++ss1[len2 > 7 ? 7 : len2 - 1];
 118           ss1 += t;
 119         }
 120     }
 121   else
 122     {
 123       memset (s1, '0', len1);
 124       for (size_t i = 0; i < len2; ++i)
 125         s1[len1 - len2 + i] = toupper (s2[i]);
 126     }
 127   s1[len1] = '\0';
 128
 129   if (HP_TIMING_AVAIL)
 130     printf ("Length %4zd/%zd, alignment %2zd/%2zd, %s:",
 131             len1, len2, align1, align2, fail ? "fail" : "found");
 132
 133   FOR_EACH_IMPL (impl, 0)
 134     do_one_test (impl, s1, s2, fail ? NULL : s1 + len1 - len2);
 135
 136   if (HP_TIMING_AVAIL)
 137     putchar ('\n');
 138 }
 139
 140
 141 static int
 142 test_main (void)
 143 {
 144   test_init ();
 145
 146   printf ("%23s", "");
 147   FOR_EACH_IMPL (impl, 0)
 148     printf ("\t%s", impl->name);
 149   putchar ('\n');
 150
 151   for (size_t klen = 2; klen < 32; ++klen)
 152     for (size_t hlen = 2 * klen; hlen < 16 * klen; hlen += klen)
 153       {
 154         do_test (0, 0, hlen, klen, 0);
 155         do_test (0, 0, hlen, klen, 1);
 156         do_test (0, 3, hlen, klen, 0);
 157         do_test (0, 3, hlen, klen, 1);
 158         do_test (0, 9, hlen, klen, 0);
 159         do_test (0, 9, hlen, klen, 1);
 160         do_test (0, 15, hlen, klen, 0);
 161         do_test (0, 15, hlen, klen, 1);
 162
 163         do_test (3, 0, hlen, klen, 0);
 164         do_test (3, 0, hlen, klen, 1);
 165         do_test (3, 3, hlen, klen, 0);
 166         do_test (3, 3, hlen, klen, 1);
 167         do_test (3, 9, hlen, klen, 0);
 168         do_test (3, 9, hlen, klen, 1);
 169         do_test (3, 15, hlen, klen, 0);
 170         do_test (3, 15, hlen, klen, 1);
 171
 172         do_test (9, 0, hlen, klen, 0);
 173         do_test (9, 0, hlen, klen, 1);
 174         do_test (9, 3, hlen, klen, 0);
 175         do_test (9, 3, hlen, klen, 1);
 176         do_test (9, 9, hlen, klen, 0);
 177         do_test (9, 9, hlen, klen, 1);
 178         do_test (9, 15, hlen, klen, 0);
 179         do_test (9, 15, hlen, klen, 1);
 180
 181         do_test (15, 0, hlen, klen, 0);
 182         do_test (15, 0, hlen, klen, 1);
 183         do_test (15, 3, hlen, klen, 0);
 184         do_test (15, 3, hlen, klen, 1);
 185         do_test (15, 9, hlen, klen, 0);
 186         do_test (15, 9, hlen, klen, 1);
 187         do_test (15, 15, hlen, klen, 0);
 188         do_test (15, 15, hlen, klen, 1);
 189       }
 190
 191   do_test (0, 0, page_size - 1, 16, 0);
 192   do_test (0, 0, page_size - 1, 16, 1);
 193
 194   return ret;
 195 }
 196
 197 #include "../test-skeleton.c"