string/test-strcasestr.c

   1 /* Test and measure strcasestr functions.
   2    Copyright (C) 2010-2017 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 "strcasestr"
  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 int
  62 check_result (impl_t *impl, const char *s1, const char *s2,
  63               char *exp_result)
  64 {
  65   char *result = CALL (impl, s1, s2);
  66   if (result != exp_result)
  67     {
  68       error (0, 0, "Wrong result in function %s %s %s", impl->name,
  69              result, exp_result);
  70       ret = 1;
  71       return -1;
  72     }
  73   return 0;
  74 }
  75
  76 static void
  77 do_one_test (impl_t *impl, const char *s1, const char *s2, char *exp_result)
  78 {
  79   if (check_result (impl, s1, s2, exp_result) < 0)
  80     return;
  81 }
  82
  83
  84 static void
  85 do_test (size_t align1, size_t align2, size_t len1, size_t len2,
  86          int fail)
  87 {
  88   char *s1 = (char *) (buf1 + align1);
  89   char *s2 = (char *) (buf2 + align2);
  90
  91   static const char d[] = "1234567890abcxyz";
  92 #define dl (sizeof (d) - 1)
  93   char *ss2 = s2;
  94   for (size_t l = len2; l > 0; l = l > dl ? l - dl : 0)
  95     {
  96       size_t t = l > dl ? dl : l;
  97       ss2 = mempcpy (ss2, d, t);
  98     }
  99   s2[len2] = '\0';
 100
 101   if (fail)
 102     {
 103       char *ss1 = s1;
 104       for (size_t l = len1; l > 0; l = l > dl ? l - dl : 0)
 105         {
 106           size_t t = l > dl ? dl : l;
 107           memcpy (ss1, d, t);
 108           ++ss1[len2 > 7 ? 7 : len2 - 1];
 109           ss1 += t;
 110         }
 111     }
 112   else
 113     {
 114       memset (s1, '0', len1);
 115       for (size_t i = 0; i < len2; ++i)
 116         s1[len1 - len2 + i] = toupper (s2[i]);
 117     }
 118   s1[len1] = '\0';
 119
 120   FOR_EACH_IMPL (impl, 0)
 121     do_one_test (impl, s1, s2, fail ? NULL : s1 + len1 - len2);
 122 }
 123
 124 static void
 125 check1 (void)
 126 {
 127   const char s1[] = "AOKB";
 128   const char s2[] = "OK";
 129   char *exp_result;
 130
 131   exp_result = stupid_strcasestr (s1, s2);
 132   FOR_EACH_IMPL (impl, 0)
 133     check_result (impl, s1, s2, exp_result);
 134 }
 135
 136 static int
 137 test_main (void)
 138 {
 139   test_init ();
 140
 141   check1 ();
 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 <support/test-driver.c>