string/test-strcasestr.c

   1 /* Test and measure strcasestr functions.
   2    Copyright (C) 2010-2020 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    <https://www.gnu.org/licenses/>.  */
  19
  20 #define TEST_MAIN
  21 #define TEST_NAME "strcasestr"
  22 #include "test-string.h"
  23
  24
  25 #define STRCASESTR simple_strcasestr
  26 #define NO_ALIAS
  27 #define __strncasecmp strncasecmp
  28 #define __strnlen strnlen
  29 #include "strcasestr.c"
  30
  31
  32 static char *
  33 stupid_strcasestr (const char *s1, const char *s2)
  34 {
  35   ssize_t s1len = strlen (s1);
  36   ssize_t s2len = strlen (s2);
  37
  38   if (s2len > s1len)
  39     return NULL;
  40
  41   for (ssize_t i = 0; i <= s1len - s2len; ++i)
  42     {
  43       size_t j;
  44       for (j = 0; j < s2len; ++j)
  45         if (tolower (s1[i + j]) != tolower (s2[j]))
  46           break;
  47       if (j == s2len)
  48         return (char *) s1 + i;
  49     }
  50
  51   return NULL;
  52 }
  53
  54
  55 typedef char *(*proto_t) (const char *, const char *);
  56
  57 IMPL (stupid_strcasestr, 0)
  58 IMPL (simple_strcasestr, 0)
  59 IMPL (strcasestr, 1)
  60
  61
  62 static int
  63 check_result (impl_t *impl, const char *s1, const char *s2,
  64               char *exp_result)
  65 {
  66   char *result = CALL (impl, s1, s2);
  67   if (result != exp_result)
  68     {
  69       error (0, 0, "Wrong result in function %s %s %s", impl->name,
  70              (result == NULL) ? "(null)" : result,
  71              (exp_result == NULL) ? "(null)" : exp_result);
  72       ret = 1;
  73       return -1;
  74     }
  75   return 0;
  76 }
  77
  78 static void
  79 do_one_test (impl_t *impl, const char *s1, const char *s2, char *exp_result)
  80 {
  81   if (check_result (impl, s1, s2, exp_result) < 0)
  82     return;
  83 }
  84
  85
  86 static void
  87 do_test (size_t align1, size_t align2, size_t len1, size_t len2,
  88          int fail)
  89 {
  90   char *s1 = (char *) (buf1 + align1);
  91   char *s2 = (char *) (buf2 + align2);
  92
  93   static const char d[] = "1234567890abcxyz";
  94 #define dl (sizeof (d) - 1)
  95   char *ss2 = s2;
  96   for (size_t l = len2; l > 0; l = l > dl ? l - dl : 0)
  97     {
  98       size_t t = l > dl ? dl : l;
  99       ss2 = mempcpy (ss2, d, t);
 100     }
 101   s2[len2] = '\0';
 102
 103   if (fail)
 104     {
 105       char *ss1 = s1;
 106       for (size_t l = len1; l > 0; l = l > dl ? l - dl : 0)
 107         {
 108           size_t t = l > dl ? dl : l;
 109           memcpy (ss1, d, t);
 110           ++ss1[len2 > 7 ? 7 : len2 - 1];
 111           ss1 += t;
 112         }
 113     }
 114   else
 115     {
 116       memset (s1, '0', len1);
 117       for (size_t i = 0; i < len2; ++i)
 118         s1[len1 - len2 + i] = toupper (s2[i]);
 119     }
 120   s1[len1] = '\0';
 121
 122   FOR_EACH_IMPL (impl, 0)
 123     do_one_test (impl, s1, s2, fail ? NULL : s1 + len1 - len2);
 124 }
 125
 126 static void
 127 check1 (void)
 128 {
 129   const char s1[] = "AOKB";
 130   const char s2[] = "OK";
 131   char *exp_result;
 132
 133   exp_result = stupid_strcasestr (s1, s2);
 134   FOR_EACH_IMPL (impl, 0)
 135     check_result (impl, s1, s2, exp_result);
 136 }
 137
 138 static int
 139 test_main (void)
 140 {
 141   test_init ();
 142
 143   check1 ();
 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 <support/test-driver.c>