string/test-strchr.c

   1 /* Test and measure STRCHR functions.
   2    Copyright (C) 1999, 2002, 2003, 2011 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 #include "test-string.h"
  23
  24 #ifndef WIDE
  25 # ifdef USE_FOR_STRCHRNUL
  26 #  define STRCHR strchrnul
  27 #  define stupid_STRCHR stupid_STRCHRNUL
  28 #  define simple_STRCHR simple_STRCHRNUL
  29 # else
  30 #  define STRCHR strchr
  31 # endif
  32 # define STRLEN strlen
  33 # define CHAR char
  34 # define BIG_CHAR CHAR_MAX
  35 # define MIDDLE_CHAR 127
  36 # define SMALL_CHAR 23
  37 # define UCHAR unsigned char
  38 #else
  39 # include <wchar.h>
  40 # define STRCHR wcschr
  41 # define STRLEN wcslen
  42 # define CHAR wchar_t
  43 # define BIG_CHAR WCHAR_MAX
  44 # define MIDDLE_CHAR 1121
  45 # define SMALL_CHAR 851
  46 # define UCHAR wchar_t
  47 #endif
  48
  49 #ifdef USE_FOR_STRCHRNUL
  50 # define NULLRET(endptr) endptr
  51 #else
  52 # define NULLRET(endptr) NULL
  53 #endif
  54
  55
  56 typedef CHAR *(*proto_t) (const CHAR *, int);
  57
  58 CHAR *
  59 simple_STRCHR (const CHAR *s, int c)
  60 {
  61   for (; *s != (CHAR) c; ++s)
  62     if (*s == '\0')
  63       return NULLRET ((CHAR *) s);
  64   return (CHAR *) s;
  65 }
  66
  67 CHAR *
  68 stupid_STRCHR (const CHAR *s, int c)
  69 {
  70   size_t n = STRLEN (s) + 1;
  71
  72   while (n--)
  73     if (*s++ == (CHAR) c)
  74       return (CHAR *) s - 1;
  75   return NULLRET ((CHAR *) s - 1);
  76 }
  77
  78 IMPL (stupid_STRCHR, 0)
  79 IMPL (simple_STRCHR, 0)
  80 IMPL (STRCHR, 1)
  81
  82 static void
  83 do_one_test (impl_t *impl, const CHAR *s, int c, const CHAR *exp_res)
  84 {
  85   CHAR *res = CALL (impl, s, c);
  86   if (res != exp_res)
  87     {
  88       error (0, 0, "Wrong result in function %s %#x %p %p", impl->name,
  89              c, res, exp_res);
  90       ret = 1;
  91       return;
  92     }
  93
  94   if (HP_TIMING_AVAIL)
  95     {
  96       hp_timing_t start __attribute ((unused));
  97       hp_timing_t stop __attribute ((unused));
  98       hp_timing_t best_time = ~ (hp_timing_t) 0;
  99       size_t i;
 100
 101       for (i = 0; i < 32; ++i)
 102         {
 103           HP_TIMING_NOW (start);
 104           CALL (impl, s, c);
 105           HP_TIMING_NOW (stop);
 106           HP_TIMING_BEST (best_time, start, stop);
 107         }
 108
 109       printf ("\t%zd", (size_t) best_time);
 110     }
 111 }
 112
 113 static void
 114 do_test (size_t align, size_t pos, size_t len, int seek_char, int max_char)
 115 /* For wcschr: align here means align not in bytes,
 116    but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t))
 117    len for wcschr here isn't in bytes but it's number of wchar_t symbols.  */
 118 {
 119   size_t i;
 120   CHAR *result;
 121   CHAR *buf = (CHAR *) buf1;
 122   align &= 15;
 123   if ((align + len) * sizeof (CHAR) >= page_size)
 124     return;
 125
 126   for (i = 0; i < len; ++i)
 127     {
 128       buf[align + i] = 32 + 23 * i % max_char;
 129       if (buf[align + i] == seek_char)
 130         buf[align + i] = seek_char + 1;
 131       else if (buf[align + i] == 0)
 132         buf[align + i] = 1;
 133     }
 134   buf[align + len] = 0;
 135
 136   if (pos < len)
 137     {
 138       buf[align + pos] = seek_char;
 139       result = buf + align + pos;
 140     }
 141   else if (seek_char == 0)
 142     result = buf + align + len;
 143   else
 144     result = NULLRET (buf + align + len);
 145
 146   if (HP_TIMING_AVAIL)
 147     printf ("Length %4zd, alignment in bytes %2zd:",
 148             pos, align * sizeof (CHAR));
 149
 150   FOR_EACH_IMPL (impl, 0)
 151     do_one_test (impl, buf + align, seek_char, result);
 152
 153   if (HP_TIMING_AVAIL)
 154     putchar ('\n');
 155 }
 156
 157 static void
 158 do_random_tests (void)
 159 {
 160   size_t i, j, n, align, pos, len;
 161   int seek_char;
 162   CHAR *result;
 163   UCHAR *p = (UCHAR *) (buf1 + page_size - 512 * sizeof (CHAR));
 164
 165   for (n = 0; n < ITERATIONS; n++)
 166     {
 167       /* For wcschr: align here means align not in bytes, but in wchar_ts,
 168          in bytes it will equal to align * (sizeof (wchar_t)).  */
 169       align = random () & 15;
 170       pos = random () & 511;
 171       seek_char = random () & 255;
 172       if (pos + align >= 511)
 173         pos = 510 - align - (random () & 7);
 174       /* len for wcschr here isn't in bytes but it's number of wchar_t
 175          symbols.  */
 176       len = random () & 511;
 177       if ((pos == len && seek_char)
 178           || (pos > len && (random () & 1)))
 179         len = pos + 1 + (random () & 7);
 180       if (len + align >= 512)
 181         len = 511 - align - (random () & 7);
 182       if (pos == len && seek_char)
 183         len = pos + 1;
 184       j = (pos > len ? pos : len) + align + 64;
 185       if (j > 512)
 186         j = 512;
 187
 188       for (i = 0; i < j; i++)
 189         {
 190           if (i == pos + align)
 191             p[i] = seek_char;
 192           else if (i == len + align)
 193             p[i] = 0;
 194           else
 195             {
 196               p[i] = random () & 255;
 197               if (i < pos + align && p[i] == seek_char)
 198                 p[i] = seek_char + 13;
 199               if (i < len + align && !p[i])
 200                 {
 201                   p[i] = seek_char - 13;
 202                   if (!p[i])
 203                     p[i] = 140;
 204                 }
 205             }
 206         }
 207
 208       if (pos <= len)
 209         result = (CHAR *) (p + pos + align);
 210       else if (seek_char == 0)
 211         result = (CHAR *) (p + len + align);
 212       else
 213         result = NULLRET ((CHAR *) (p + len + align));
 214
 215       FOR_EACH_IMPL (impl, 1)
 216         if (CALL (impl, (CHAR *) (p + align), seek_char) != result)
 217           {
 218             error (0, 0, "Iteration %zd - wrong result in function \
 219                    %s (align in bytes: %zd, seek_char: %d, len: %zd, pos: %zd) %p != %p, p %p",
 220                    n, impl->name, align * sizeof (CHAR), seek_char, len, pos,
 221                    CALL (impl, (CHAR *) (p + align), seek_char), result, p);
 222             ret = 1;
 223           }
 224     }
 225 }
 226
 227 int
 228 test_main (void)
 229 {
 230   size_t i;
 231
 232   test_init ();
 233
 234   printf ("%20s", "");
 235   FOR_EACH_IMPL (impl, 0)
 236     printf ("\t%s", impl->name);
 237   putchar ('\n');
 238
 239   for (i = 1; i < 8; ++i)
 240     {
 241       do_test (0, 16 << i, 2048, SMALL_CHAR, MIDDLE_CHAR);
 242       do_test (i, 16 << i, 2048, SMALL_CHAR, MIDDLE_CHAR);
 243     }
 244
 245   for (i = 1; i < 8; ++i)
 246     {
 247       do_test (i, 64, 256, SMALL_CHAR, MIDDLE_CHAR);
 248       do_test (i, 64, 256, SMALL_CHAR, BIG_CHAR);
 249     }
 250
 251   for (i = 0; i < 32; ++i)
 252     {
 253       do_test (0, i, i + 1, SMALL_CHAR, MIDDLE_CHAR);
 254       do_test (0, i, i + 1, SMALL_CHAR, BIG_CHAR);
 255     }
 256
 257   for (i = 1; i < 8; ++i)
 258     {
 259       do_test (0, 16 << i, 2048, 0, MIDDLE_CHAR);
 260       do_test (i, 16 << i, 2048, 0, MIDDLE_CHAR);
 261     }
 262
 263   for (i = 1; i < 8; ++i)
 264     {
 265       do_test (i, 64, 256, 0, MIDDLE_CHAR);
 266       do_test (i, 64, 256, 0, BIG_CHAR);
 267     }
 268
 269   for (i = 0; i < 32; ++i)
 270     {
 271       do_test (0, i, i + 1, 0, MIDDLE_CHAR);
 272       do_test (0, i, i + 1, 0, BIG_CHAR);
 273     }
 274
 275   do_random_tests ();
 276   return ret;
 277 }
 278
 279 #include "../test-skeleton.c"