string/test-strstr.c

   1 /* Test and measure strstr functions.
   2    Copyright (C) 2010-2013 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 #define TEST_NAME "strstr"
  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 int
  60 check_result (impl_t *impl, const char *s1, const char *s2,
  61               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 -1;
  70     }
  71
  72   return 0;
  73 }
  74
  75 static void
  76 do_one_test (impl_t *impl, const char *s1, const char *s2, char *exp_result)
  77 {
  78   if (check_result (impl, s1, s2, exp_result) < 0)
  79     return;
  80
  81   if (HP_TIMING_AVAIL)
  82     {
  83       hp_timing_t start __attribute ((unused));
  84       hp_timing_t stop __attribute ((unused));
  85       hp_timing_t best_time = ~(hp_timing_t) 0;
  86       size_t i;
  87
  88       for (i = 0; i < 32; ++i)
  89         {
  90           HP_TIMING_NOW (start);
  91           CALL (impl, s1, s2);
  92           HP_TIMING_NOW (stop);
  93           HP_TIMING_BEST (best_time, start, stop);
  94         }
  95
  96       printf ("\t%zd", (size_t) best_time);
  97     }
  98 }
  99
 100
 101 static void
 102 do_test (size_t align1, size_t align2, size_t len1, size_t len2,
 103          int fail)
 104 {
 105   char *s1 = (char *) (buf1 + align1);
 106   char *s2 = (char *) (buf2 + align2);
 107
 108   static const char d[] = "1234567890abcdef";
 109 #define dl (sizeof (d) - 1)
 110   char *ss2 = s2;
 111   for (size_t l = len2; l > 0; l = l > dl ? l - dl : 0)
 112     {
 113       size_t t = l > dl ? dl : l;
 114       ss2 = mempcpy (ss2, d, t);
 115     }
 116   s2[len2] = '\0';
 117
 118   if (fail)
 119     {
 120       char *ss1 = s1;
 121       for (size_t l = len1; l > 0; l = l > dl ? l - dl : 0)
 122         {
 123           size_t t = l > dl ? dl : l;
 124           memcpy (ss1, d, t);
 125           ++ss1[len2 > 7 ? 7 : len2 - 1];
 126           ss1 += t;
 127         }
 128     }
 129   else
 130     {
 131       memset (s1, '0', len1);
 132       memcpy (s1 + len1 - len2, s2, len2);
 133     }
 134   s1[len1] = '\0';
 135
 136   if (HP_TIMING_AVAIL)
 137     printf ("Length %4zd/%zd, alignment %2zd/%2zd, %s:",
 138             len1, len2, align1, align2, fail ? "fail" : "found");
 139
 140   FOR_EACH_IMPL (impl, 0)
 141     do_one_test (impl, s1, s2, fail ? NULL : s1 + len1 - len2);
 142
 143   if (HP_TIMING_AVAIL)
 144     putchar ('\n');
 145 }
 146
 147 static void
 148 check1 (void)
 149 {
 150   const char s1[] =
 151     "F_BD_CE_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD_C3_88_20_EF_BF_BD_EF_BF_BD_EF_BF_BD_C3_A7_20_EF_BF_BD";
 152   const char s2[] = "_EF_BF_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD";
 153   char *exp_result;
 154
 155   exp_result = stupid_strstr (s1, s2);
 156   FOR_EACH_IMPL (impl, 0)
 157     check_result (impl, s1, s2, exp_result);
 158 }
 159
 160 static void
 161 check2 (void)
 162 {
 163   const char s1[] = ", enable_static, \0, enable_shared, ";
 164   char *exp_result;
 165   char *s2 = (void *) buf1 + page_size - 18;
 166
 167   strcpy (s2, s1);
 168   exp_result = stupid_strstr (s1, s1 + 18);
 169   FOR_EACH_IMPL (impl, 0)
 170     {
 171       check_result (impl, s1, s1 + 18, exp_result);
 172       check_result (impl, s2, s1 + 18, exp_result);
 173     }
 174 }
 175
 176 static int
 177 test_main (void)
 178 {
 179   test_init ();
 180
 181   check1 ();
 182   check2 ();
 183
 184   printf ("%23s", "");
 185   FOR_EACH_IMPL (impl, 0)
 186     printf ("\t%s", impl->name);
 187   putchar ('\n');
 188
 189   for (size_t klen = 2; klen < 32; ++klen)
 190     for (size_t hlen = 2 * klen; hlen < 16 * klen; hlen += klen)
 191       {
 192         do_test (0, 0, hlen, klen, 0);
 193         do_test (0, 0, hlen, klen, 1);
 194         do_test (0, 3, hlen, klen, 0);
 195         do_test (0, 3, hlen, klen, 1);
 196         do_test (0, 9, hlen, klen, 0);
 197         do_test (0, 9, hlen, klen, 1);
 198         do_test (0, 15, hlen, klen, 0);
 199         do_test (0, 15, hlen, klen, 1);
 200
 201         do_test (3, 0, hlen, klen, 0);
 202         do_test (3, 0, hlen, klen, 1);
 203         do_test (3, 3, hlen, klen, 0);
 204         do_test (3, 3, hlen, klen, 1);
 205         do_test (3, 9, hlen, klen, 0);
 206         do_test (3, 9, hlen, klen, 1);
 207         do_test (3, 15, hlen, klen, 0);
 208         do_test (3, 15, hlen, klen, 1);
 209
 210         do_test (9, 0, hlen, klen, 0);
 211         do_test (9, 0, hlen, klen, 1);
 212         do_test (9, 3, hlen, klen, 0);
 213         do_test (9, 3, hlen, klen, 1);
 214         do_test (9, 9, hlen, klen, 0);
 215         do_test (9, 9, hlen, klen, 1);
 216         do_test (9, 15, hlen, klen, 0);
 217         do_test (9, 15, hlen, klen, 1);
 218
 219         do_test (15, 0, hlen, klen, 0);
 220         do_test (15, 0, hlen, klen, 1);
 221         do_test (15, 3, hlen, klen, 0);
 222         do_test (15, 3, hlen, klen, 1);
 223         do_test (15, 9, hlen, klen, 0);
 224         do_test (15, 9, hlen, klen, 1);
 225         do_test (15, 15, hlen, klen, 0);
 226         do_test (15, 15, hlen, klen, 1);
 227       }
 228
 229   do_test (0, 0, page_size - 1, 16, 0);
 230   do_test (0, 0, page_size - 1, 16, 1);
 231
 232   return ret;
 233 }
 234
 235 #include "../test-skeleton.c"