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, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #define TEST_MAIN
  21 #include "test-string.h"
  22
  23
  24 #define STRCASESTR simple_strcasestr
  25 #define NO_ALIAS
  26 #define __strncasecmp strncasecmp
  27 #include "strcasestr.c"
  28
  29
  30 static char *
  31 stupid_strcasestr (const char *s1, const char *s2)
  32 {
  33   ssize_t s1len = strlen (s1);
  34   ssize_t s2len = strlen (s2);
  35
  36   if (s2len > s1len)
  37     return NULL;
  38
  39   for (ssize_t i = 0; i <= s1len - s2len; ++i)
  40     {
  41       size_t j;
  42       for (j = 0; j < s2len; ++j)
  43         if (tolower (s1[i + j]) != tolower (s2[j]))
  44           break;
  45       if (j == s2len)
  46         return (char *) s1 + i;
  47     }
  48
  49   return NULL;
  50 }
  51
  52
  53 typedef char *(*proto_t) (const char *, const char *);
  54
  55 IMPL (stupid_strcasestr, 0)
  56 IMPL (simple_strcasestr, 0)
  57 IMPL (strcasestr, 1)
  58
  59
  60 static void
  61 do_one_test (impl_t *impl, const char *s1, const char *s2, char *exp_result)
  62 {
  63   char *result = CALL (impl, s1, s2);
  64   if (result != exp_result)
  65     {
  66       error (0, 0, "Wrong result in function %s %s %s", impl->name,
  67              result, exp_result);
  68       ret = 1;
  69       return;
  70     }
  71
  72   if (HP_TIMING_AVAIL)
  73     {
  74       hp_timing_t start __attribute ((unused));
  75       hp_timing_t stop __attribute ((unused));
  76       hp_timing_t best_time = ~(hp_timing_t) 0;
  77       size_t i;
  78
  79       for (i = 0; i < 32; ++i)
  80         {
  81           HP_TIMING_NOW (start);
  82           CALL (impl, s1, s2);
  83           HP_TIMING_NOW (stop);
  84           HP_TIMING_BEST (best_time, start, stop);
  85         }
  86
  87       printf ("\t%zd", (size_t) best_time);
  88     }
  89 }
  90
  91
  92 static void
  93 do_test (size_t align1, size_t align2, size_t len1, size_t len2,
  94          int fail)
  95 {
  96   char *s1 = (char *) (buf1 + align1);
  97   char *s2 = (char *) (buf2 + align2);
  98
  99   static const char d[] = "1234567890abcxyz";
 100 #define dl (sizeof (d) - 1)
 101   char *ss2 = s2;
 102   for (size_t l = len2; l > 0; l = l > dl ? l - dl : 0)
 103     {
 104       size_t t = l > dl ? dl : l;
 105       ss2 = mempcpy (ss2, d, t);
 106     }
 107   s2[len2] = '\0';
 108
 109   if (fail)
 110     {
 111       char *ss1 = s1;
 112       for (size_t l = len1; l > 0; l = l > dl ? l - dl : 0)
 113         {
 114           size_t t = l > dl ? dl : l;
 115           memcpy (ss1, d, t);
 116           ++ss1[len2 > 7 ? 7 : len2 - 1];
 117           ss1 += t;
 118         }
 119     }
 120   else
 121     {
 122       memset (s1, '0', len1);
 123       for (size_t i = 0; i < len2; ++i)
 124         s1[len1 - len2 + i] = toupper (s2[i]);
 125     }
 126   s1[len1] = '\0';
 127
 128   if (HP_TIMING_AVAIL)
 129     printf ("Length %4zd/%zd, alignment %2zd/%2zd, %s:",
 130             len1, len2, align1, align2, fail ? "fail" : "found");
 131
 132   FOR_EACH_IMPL (impl, 0)
 133     do_one_test (impl, s1, s2, fail ? NULL : s1 + len1 - len2);
 134
 135   if (HP_TIMING_AVAIL)
 136     putchar ('\n');
 137 }
 138
 139
 140 static int
 141 test_main (void)
 142 {
 143   test_init ();
 144
 145   printf ("%23s", "");
 146   FOR_EACH_IMPL (impl, 0)
 147     printf ("\t%s", impl->name);
 148   putchar ('\n');
 149
 150   for (size_t klen = 2; klen < 32; ++klen)
 151     for (size_t hlen = 2 * klen; hlen < 16 * klen; hlen += klen)
 152       {
 153         do_test (0, 0, hlen, klen, 0);
 154         do_test (0, 0, hlen, klen, 1);
 155         do_test (0, 3, hlen, klen, 0);
 156         do_test (0, 3, hlen, klen, 1);
 157         do_test (0, 9, hlen, klen, 0);
 158         do_test (0, 9, hlen, klen, 1);
 159         do_test (0, 15, hlen, klen, 0);
 160         do_test (0, 15, hlen, klen, 1);
 161
 162         do_test (3, 0, hlen, klen, 0);
 163         do_test (3, 0, hlen, klen, 1);
 164         do_test (3, 3, hlen, klen, 0);
 165         do_test (3, 3, hlen, klen, 1);
 166         do_test (3, 9, hlen, klen, 0);
 167         do_test (3, 9, hlen, klen, 1);
 168         do_test (3, 15, hlen, klen, 0);
 169         do_test (3, 15, hlen, klen, 1);
 170
 171         do_test (9, 0, hlen, klen, 0);
 172         do_test (9, 0, hlen, klen, 1);
 173         do_test (9, 3, hlen, klen, 0);
 174         do_test (9, 3, hlen, klen, 1);
 175         do_test (9, 9, hlen, klen, 0);
 176         do_test (9, 9, hlen, klen, 1);
 177         do_test (9, 15, hlen, klen, 0);
 178         do_test (9, 15, hlen, klen, 1);
 179
 180         do_test (15, 0, hlen, klen, 0);
 181         do_test (15, 0, hlen, klen, 1);
 182         do_test (15, 3, hlen, klen, 0);
 183         do_test (15, 3, hlen, klen, 1);
 184         do_test (15, 9, hlen, klen, 0);
 185         do_test (15, 9, hlen, klen, 1);
 186         do_test (15, 15, hlen, klen, 0);
 187         do_test (15, 15, hlen, klen, 1);
 188       }
 189
 190   do_test (0, 0, page_size - 1, 16, 0);
 191   do_test (0, 0, page_size - 1, 16, 1);
 192
 193   return ret;
 194 }
 195
 196 #include "../test-skeleton.c"