string/test-strchr.c

   1 /* Test and measure STRCHR functions.
   2    Copyright (C) 1999-2015 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Written by Jakub Jelinek <jakub@redhat.com>, 1999.
   5    Added wcschr support by Liubov Dmitrieva <liubov.dmitrieva@gmail.com>, 2011
   6
   7    The GNU C Library is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU Lesser General Public
   9    License as published by the Free Software Foundation; either
  10    version 2.1 of the License, or (at your option) any later version.
  11
  12    The GNU C Library is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    Lesser General Public License for more details.
  16
  17    You should have received a copy of the GNU Lesser General Public
  18    License along with the GNU C Library; if not, see
  19    <http://www.gnu.org/licenses/>.  */
  20
  21 #define TEST_MAIN
  22 #ifndef WIDE
  23 # ifdef USE_FOR_STRCHRNUL
  24 #  define TEST_NAME "strchrnul"
  25 # else
  26 #  define TEST_NAME "strchr"
  27 # endif
  28 #else
  29 # define TEST_NAME "wcschr"
  30 #endif
  31 #include "test-string.h"
  32
  33 #ifndef WIDE
  34 # ifdef USE_FOR_STRCHRNUL
  35 #  define STRCHR strchrnul
  36 #  define stupid_STRCHR stupid_STRCHRNUL
  37 #  define simple_STRCHR simple_STRCHRNUL
  38 # else
  39 #  define STRCHR strchr
  40 # endif
  41 # define STRLEN strlen
  42 # define CHAR char
  43 # define BIG_CHAR CHAR_MAX
  44 # define MIDDLE_CHAR 127
  45 # define SMALL_CHAR 23
  46 # define UCHAR unsigned char
  47 # define L(s) s
  48 #else
  49 # include <wchar.h>
  50 # define STRCHR wcschr
  51 # define STRLEN wcslen
  52 # define CHAR wchar_t
  53 # define BIG_CHAR WCHAR_MAX
  54 # define MIDDLE_CHAR 1121
  55 # define SMALL_CHAR 851
  56 # define UCHAR wchar_t
  57 # define L(s) L ## s
  58 #endif
  59
  60 #ifdef USE_FOR_STRCHRNUL
  61 # define NULLRET(endptr) endptr
  62 #else
  63 # define NULLRET(endptr) NULL
  64 #endif
  65
  66
  67 typedef CHAR *(*proto_t) (const CHAR *, int);
  68
  69 CHAR *
  70 simple_STRCHR (const CHAR *s, int c)
  71 {
  72   for (; *s != (CHAR) c; ++s)
  73     if (*s == '\0')
  74       return NULLRET ((CHAR *) s);
  75   return (CHAR *) s;
  76 }
  77
  78 CHAR *
  79 stupid_STRCHR (const CHAR *s, int c)
  80 {
  81   size_t n = STRLEN (s) + 1;
  82
  83   while (n--)
  84     if (*s++ == (CHAR) c)
  85       return (CHAR *) s - 1;
  86   return NULLRET ((CHAR *) s - 1);
  87 }
  88
  89 IMPL (stupid_STRCHR, 0)
  90 IMPL (simple_STRCHR, 0)
  91 IMPL (STRCHR, 1)
  92
  93 static int
  94 check_result (impl_t *impl, const CHAR *s, int c, const CHAR *exp_res)
  95 {
  96   CHAR *res = CALL (impl, s, c);
  97   if (res != exp_res)
  98     {
  99       error (0, 0, "Wrong result in function %s %#x %p %p", impl->name,
 100              c, res, exp_res);
 101       ret = 1;
 102       return -1;
 103     }
 104   return 0;
 105 }
 106
 107 static void
 108 do_one_test (impl_t *impl, const CHAR *s, int c, const CHAR *exp_res)
 109 {
 110   if (check_result (impl, s, c, exp_res) < 0)
 111     return;
 112 }
 113
 114 static void
 115 do_test (size_t align, size_t pos, size_t len, int seek_char, int max_char)
 116 /* For wcschr: align here means align not in bytes,
 117    but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t))
 118    len for wcschr here isn't in bytes but it's number of wchar_t symbols.  */
 119 {
 120   size_t i;
 121   CHAR *result;
 122   CHAR *buf = (CHAR *) buf1;
 123   align &= 15;
 124   if ((align + len) * sizeof (CHAR) >= page_size)
 125     return;
 126
 127   for (i = 0; i < len; ++i)
 128     {
 129       buf[align + i] = 32 + 23 * i % max_char;
 130       if (buf[align + i] == seek_char)
 131         buf[align + i] = seek_char + 1;
 132       else if (buf[align + i] == 0)
 133         buf[align + i] = 1;
 134     }
 135   buf[align + len] = 0;
 136
 137   if (pos < len)
 138     {
 139       buf[align + pos] = seek_char;
 140       result = buf + align + pos;
 141     }
 142   else if (seek_char == 0)
 143     result = buf + align + len;
 144   else
 145     result = NULLRET (buf + align + len);
 146
 147   FOR_EACH_IMPL (impl, 0)
 148     do_one_test (impl, buf + align, seek_char, result);
 149 }
 150
 151 static void
 152 do_random_tests (void)
 153 {
 154   size_t i, j, n, align, pos, len;
 155   int seek_char;
 156   CHAR *result;
 157   UCHAR *p = (UCHAR *) (buf1 + page_size - 512 * sizeof (CHAR));
 158
 159   for (n = 0; n < ITERATIONS; n++)
 160     {
 161       /* For wcschr: align here means align not in bytes, but in wchar_ts,
 162          in bytes it will equal to align * (sizeof (wchar_t)).  */
 163       align = random () & 15;
 164       pos = random () & 511;
 165       seek_char = random () & 255;
 166       if (pos + align >= 511)
 167         pos = 510 - align - (random () & 7);
 168       /* len for wcschr here isn't in bytes but it's number of wchar_t
 169          symbols.  */
 170       len = random () & 511;
 171       if ((pos == len && seek_char)
 172           || (pos > len && (random () & 1)))
 173         len = pos + 1 + (random () & 7);
 174       if (len + align >= 512)
 175         len = 511 - align - (random () & 7);
 176       if (pos == len && seek_char)
 177         len = pos + 1;
 178       j = (pos > len ? pos : len) + align + 64;
 179       if (j > 512)
 180         j = 512;
 181
 182       for (i = 0; i < j; i++)
 183         {
 184           if (i == pos + align)
 185             p[i] = seek_char;
 186           else if (i == len + align)
 187             p[i] = 0;
 188           else
 189             {
 190               p[i] = random () & 255;
 191               if (i < pos + align && p[i] == seek_char)
 192                 p[i] = seek_char + 13;
 193               if (i < len + align && !p[i])
 194                 {
 195                   p[i] = seek_char - 13;
 196                   if (!p[i])
 197                     p[i] = 140;
 198                 }
 199             }
 200         }
 201
 202       if (pos <= len)
 203         result = (CHAR *) (p + pos + align);
 204       else if (seek_char == 0)
 205         result = (CHAR *) (p + len + align);
 206       else
 207         result = NULLRET ((CHAR *) (p + len + align));
 208
 209       FOR_EACH_IMPL (impl, 1)
 210         if (CALL (impl, (CHAR *) (p + align), seek_char) != result)
 211           {
 212             error (0, 0, "Iteration %zd - wrong result in function \
 213                    %s (align in bytes: %zd, seek_char: %d, len: %zd, pos: %zd) %p != %p, p %p",
 214                    n, impl->name, align * sizeof (CHAR), seek_char, len, pos,
 215                    CALL (impl, (CHAR *) (p + align), seek_char), result, p);
 216             ret = 1;
 217           }
 218     }
 219 }
 220
 221 static void
 222 check1 (void)
 223 {
 224   CHAR s[] __attribute__((aligned(16))) = L ("\xff");
 225   CHAR c = L ('\xfe');
 226   CHAR *exp_result = stupid_STRCHR (s, c);
 227
 228   FOR_EACH_IMPL (impl, 0)
 229     check_result (impl, s, c, exp_result);
 230 }
 231
 232 int
 233 test_main (void)
 234 {
 235   size_t i;
 236
 237   test_init ();
 238
 239   check1 ();
 240
 241   printf ("%20s", "");
 242   FOR_EACH_IMPL (impl, 0)
 243     printf ("\t%s", impl->name);
 244   putchar ('\n');
 245
 246   for (i = 1; i < 8; ++i)
 247     {
 248       do_test (0, 16 << i, 2048, SMALL_CHAR, MIDDLE_CHAR);
 249       do_test (i, 16 << i, 2048, SMALL_CHAR, MIDDLE_CHAR);
 250     }
 251
 252   for (i = 1; i < 8; ++i)
 253     {
 254       do_test (i, 64, 256, SMALL_CHAR, MIDDLE_CHAR);
 255       do_test (i, 64, 256, SMALL_CHAR, BIG_CHAR);
 256     }
 257
 258   for (i = 0; i < 32; ++i)
 259     {
 260       do_test (0, i, i + 1, SMALL_CHAR, MIDDLE_CHAR);
 261       do_test (0, i, i + 1, SMALL_CHAR, BIG_CHAR);
 262     }
 263
 264   for (i = 1; i < 8; ++i)
 265     {
 266       do_test (0, 16 << i, 2048, 0, MIDDLE_CHAR);
 267       do_test (i, 16 << i, 2048, 0, MIDDLE_CHAR);
 268     }
 269
 270   for (i = 1; i < 8; ++i)
 271     {
 272       do_test (i, 64, 256, 0, MIDDLE_CHAR);
 273       do_test (i, 64, 256, 0, BIG_CHAR);
 274     }
 275
 276   for (i = 0; i < 32; ++i)
 277     {
 278       do_test (0, i, i + 1, 0, MIDDLE_CHAR);
 279       do_test (0, i, i + 1, 0, BIG_CHAR);
 280     }
 281
 282   do_random_tests ();
 283   return ret;
 284 }
 285
 286 #include "../test-skeleton.c"