string/test-strcasestr.c

   1 /* Test and measure strcasestr functions.
   2    Copyright (C) 2010-2022 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #define TEST_MAIN
  20 #define TEST_NAME "strcasestr"
  21 #include "test-string.h"
  22
  23
  24 #define STRCASESTR simple_strcasestr
  25 #define NO_ALIAS
  26 #define __strncasecmp strncasecmp
  27 #define __strnlen strnlen
  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 == NULL) ? "(null)" : result,
  70              (exp_result == NULL) ? "(null)" : exp_result);
  71       ret = 1;
  72       return -1;
  73     }
  74   return 0;
  75 }
  76
  77 static void
  78 do_one_test (impl_t *impl, const char *s1, const char *s2, char *exp_result)
  79 {
  80   if (check_result (impl, s1, s2, exp_result) < 0)
  81     return;
  82 }
  83
  84
  85 static void
  86 do_test (size_t align1, size_t align2, size_t len1, size_t len2,
  87          int fail)
  88 {
  89   char *s1 = (char *) (buf1 + align1);
  90   char *s2 = (char *) (buf2 + align2);
  91
  92   static const char d[] = "1234567890abcxyz";
  93 #define dl (sizeof (d) - 1)
  94   char *ss2 = s2;
  95   for (size_t l = len2; l > 0; l = l > dl ? l - dl : 0)
  96     {
  97       size_t t = l > dl ? dl : l;
  98       ss2 = mempcpy (ss2, d, t);
  99     }
 100   s2[len2] = '\0';
 101
 102   if (fail)
 103     {
 104       char *ss1 = s1;
 105       for (size_t l = len1; l > 0; l = l > dl ? l - dl : 0)
 106         {
 107           size_t t = l > dl ? dl : l;
 108           memcpy (ss1, d, t);
 109           ++ss1[len2 > 7 ? 7 : len2 - 1];
 110           ss1 += t;
 111         }
 112     }
 113   else
 114     {
 115       memset (s1, '0', len1);
 116       for (size_t i = 0; i < len2; ++i)
 117         s1[len1 - len2 + i] = toupper (s2[i]);
 118     }
 119   s1[len1] = '\0';
 120
 121   FOR_EACH_IMPL (impl, 0)
 122     do_one_test (impl, s1, s2, fail ? NULL : s1 + len1 - len2);
 123 }
 124
 125 static void
 126 check1 (void)
 127 {
 128   const char s1[] = "AOKB";
 129   const char s2[] = "OK";
 130   char *exp_result;
 131
 132   exp_result = stupid_strcasestr (s1, s2);
 133   FOR_EACH_IMPL (impl, 0)
 134     check_result (impl, s1, s2, exp_result);
 135 }
 136
 137 static int
 138 test_main (void)
 139 {
 140   test_init ();
 141
 142   check1 ();
 143
 144   printf ("%23s", "");
 145   FOR_EACH_IMPL (impl, 0)
 146     printf ("\t%s", impl->name);
 147   putchar ('\n');
 148
 149   for (size_t klen = 2; klen < 32; ++klen)
 150     for (size_t hlen = 2 * klen; hlen < 16 * klen; hlen += klen)
 151       {
 152         do_test (0, 0, hlen, klen, 0);
 153         do_test (0, 0, hlen, klen, 1);
 154         do_test (0, 3, hlen, klen, 0);
 155         do_test (0, 3, hlen, klen, 1);
 156         do_test (0, 9, hlen, klen, 0);
 157         do_test (0, 9, hlen, klen, 1);
 158         do_test (0, 15, hlen, klen, 0);
 159         do_test (0, 15, hlen, klen, 1);
 160
 161         do_test (3, 0, hlen, klen, 0);
 162         do_test (3, 0, hlen, klen, 1);
 163         do_test (3, 3, hlen, klen, 0);
 164         do_test (3, 3, hlen, klen, 1);
 165         do_test (3, 9, hlen, klen, 0);
 166         do_test (3, 9, hlen, klen, 1);
 167         do_test (3, 15, hlen, klen, 0);
 168         do_test (3, 15, hlen, klen, 1);
 169
 170         do_test (9, 0, hlen, klen, 0);
 171         do_test (9, 0, hlen, klen, 1);
 172         do_test (9, 3, hlen, klen, 0);
 173         do_test (9, 3, hlen, klen, 1);
 174         do_test (9, 9, hlen, klen, 0);
 175         do_test (9, 9, hlen, klen, 1);
 176         do_test (9, 15, hlen, klen, 0);
 177         do_test (9, 15, hlen, klen, 1);
 178
 179         do_test (15, 0, hlen, klen, 0);
 180         do_test (15, 0, hlen, klen, 1);
 181         do_test (15, 3, hlen, klen, 0);
 182         do_test (15, 3, hlen, klen, 1);
 183         do_test (15, 9, hlen, klen, 0);
 184         do_test (15, 9, hlen, klen, 1);
 185         do_test (15, 15, hlen, klen, 0);
 186         do_test (15, 15, hlen, klen, 1);
 187       }
 188
 189   do_test (0, 0, page_size - 1, 16, 0);
 190   do_test (0, 0, page_size - 1, 16, 1);
 191
 192   return ret;
 193 }
 194
 195 #include <support/test-driver.c>