string/test-strstr.c

   1 /* Test and measure strstr functions.
   2    Copyright (C) 2010-2018 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 #define libc_hidden_builtin_def(arg) /* nothing */
  27 #include "strstr.c"
  28
  29
  30 static char *
  31 stupid_strstr (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 (s1[i + j] != 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_strstr, 0)
  56 IMPL (simple_strstr, 0)
  57 IMPL (strstr, 1)
  58
  59
  60 static int
  61 check_result (impl_t *impl, const char *s1, const char *s2,
  62               char *exp_result)
  63 {
  64   char *result = CALL (impl, s1, s2);
  65   if (result != exp_result)
  66     {
  67       error (0, 0, "Wrong result in function %s %s %s", impl->name,
  68              result, exp_result);
  69       ret = 1;
  70       return -1;
  71     }
  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[] = "1234567890abcdef";
  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       memcpy (s1 + len1 - len2, s2, len2);
 116     }
 117   s1[len1] = '\0';
 118
 119   FOR_EACH_IMPL (impl, 0)
 120     do_one_test (impl, s1, s2, fail ? NULL : s1 + len1 - len2);
 121
 122 }
 123
 124 static void
 125 check1 (void)
 126 {
 127   const char s1[] =
 128     "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";
 129   const char s2[] = "_EF_BF_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD_EF_BF_BD";
 130   char *exp_result;
 131
 132   exp_result = stupid_strstr (s1, s2);
 133   FOR_EACH_IMPL (impl, 0)
 134     check_result (impl, s1, s2, exp_result);
 135 }
 136
 137 static void
 138 check2 (void)
 139 {
 140   const char s1[] = ", enable_static, \0, enable_shared, ";
 141   char *exp_result;
 142   char *s2 = (void *) buf1 + page_size - 18;
 143
 144   strcpy (s2, s1);
 145   exp_result = stupid_strstr (s1, s1 + 18);
 146   FOR_EACH_IMPL (impl, 0)
 147     {
 148       check_result (impl, s1, s1 + 18, exp_result);
 149       check_result (impl, s2, s1 + 18, exp_result);
 150     }
 151 }
 152
 153 static int
 154 test_main (void)
 155 {
 156   test_init ();
 157
 158   check1 ();
 159   check2 ();
 160
 161   printf ("%23s", "");
 162   FOR_EACH_IMPL (impl, 0)
 163     printf ("\t%s", impl->name);
 164   putchar ('\n');
 165
 166   for (size_t klen = 2; klen < 32; ++klen)
 167     for (size_t hlen = 2 * klen; hlen < 16 * klen; hlen += klen)
 168       {
 169         do_test (0, 0, hlen, klen, 0);
 170         do_test (0, 0, hlen, klen, 1);
 171         do_test (0, 3, hlen, klen, 0);
 172         do_test (0, 3, hlen, klen, 1);
 173         do_test (0, 9, hlen, klen, 0);
 174         do_test (0, 9, hlen, klen, 1);
 175         do_test (0, 15, hlen, klen, 0);
 176         do_test (0, 15, hlen, klen, 1);
 177
 178         do_test (3, 0, hlen, klen, 0);
 179         do_test (3, 0, hlen, klen, 1);
 180         do_test (3, 3, hlen, klen, 0);
 181         do_test (3, 3, hlen, klen, 1);
 182         do_test (3, 9, hlen, klen, 0);
 183         do_test (3, 9, hlen, klen, 1);
 184         do_test (3, 15, hlen, klen, 0);
 185         do_test (3, 15, hlen, klen, 1);
 186
 187         do_test (9, 0, hlen, klen, 0);
 188         do_test (9, 0, hlen, klen, 1);
 189         do_test (9, 3, hlen, klen, 0);
 190         do_test (9, 3, hlen, klen, 1);
 191         do_test (9, 9, hlen, klen, 0);
 192         do_test (9, 9, hlen, klen, 1);
 193         do_test (9, 15, hlen, klen, 0);
 194         do_test (9, 15, hlen, klen, 1);
 195
 196         do_test (15, 0, hlen, klen, 0);
 197         do_test (15, 0, hlen, klen, 1);
 198         do_test (15, 3, hlen, klen, 0);
 199         do_test (15, 3, hlen, klen, 1);
 200         do_test (15, 9, hlen, klen, 0);
 201         do_test (15, 9, hlen, klen, 1);
 202         do_test (15, 15, hlen, klen, 0);
 203         do_test (15, 15, hlen, klen, 1);
 204       }
 205
 206   do_test (0, 0, page_size - 1, 16, 0);
 207   do_test (0, 0, page_size - 1, 16, 1);
 208
 209   return ret;
 210 }
 211
 212 #include <support/test-driver.c>