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 int
  83 check_result (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 -1;
  92     }
  93   return 0;
  94 }
  95
  96 static void
  97 do_one_test (impl_t *impl, const CHAR *s, int c, const CHAR *exp_res)
  98 {
  99   if (check_result (impl, s, c, exp_res) < 0)
 100     return;
 101
 102   if (HP_TIMING_AVAIL)
 103     {
 104       hp_timing_t start __attribute ((unused));
 105       hp_timing_t stop __attribute ((unused));
 106       hp_timing_t best_time = ~ (hp_timing_t) 0;
 107       size_t i;
 108
 109       for (i = 0; i < 32; ++i)
 110         {
 111           HP_TIMING_NOW (start);
 112           CALL (impl, s, c);
 113           HP_TIMING_NOW (stop);
 114           HP_TIMING_BEST (best_time, start, stop);
 115         }
 116
 117       printf ("\t%zd", (size_t) best_time);
 118     }
 119 }
 120
 121 static void
 122 do_test (size_t align, size_t pos, size_t len, int seek_char, int max_char)
 123 /* For wcschr: align here means align not in bytes,
 124    but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t))
 125    len for wcschr here isn't in bytes but it's number of wchar_t symbols.  */
 126 {
 127   size_t i;
 128   CHAR *result;
 129   CHAR *buf = (CHAR *) buf1;
 130   align &= 15;
 131   if ((align + len) * sizeof (CHAR) >= page_size)
 132     return;
 133
 134   for (i = 0; i < len; ++i)
 135     {
 136       buf[align + i] = 32 + 23 * i % max_char;
 137       if (buf[align + i] == seek_char)
 138         buf[align + i] = seek_char + 1;
 139       else if (buf[align + i] == 0)
 140         buf[align + i] = 1;
 141     }
 142   buf[align + len] = 0;
 143
 144   if (pos < len)
 145     {
 146       buf[align + pos] = seek_char;
 147       result = buf + align + pos;
 148     }
 149   else if (seek_char == 0)
 150     result = buf + align + len;
 151   else
 152     result = NULLRET (buf + align + len);
 153
 154   if (HP_TIMING_AVAIL)
 155     printf ("Length %4zd, alignment in bytes %2zd:",
 156             pos, align * sizeof (CHAR));
 157
 158   FOR_EACH_IMPL (impl, 0)
 159     do_one_test (impl, buf + align, seek_char, result);
 160
 161   if (HP_TIMING_AVAIL)
 162     putchar ('\n');
 163 }
 164
 165 static void
 166 do_random_tests (void)
 167 {
 168   size_t i, j, n, align, pos, len;
 169   int seek_char;
 170   CHAR *result;
 171   UCHAR *p = (UCHAR *) (buf1 + page_size - 512 * sizeof (CHAR));
 172
 173   for (n = 0; n < ITERATIONS; n++)
 174     {
 175       /* For wcschr: align here means align not in bytes, but in wchar_ts,
 176          in bytes it will equal to align * (sizeof (wchar_t)).  */
 177       align = random () & 15;
 178       pos = random () & 511;
 179       seek_char = random () & 255;
 180       if (pos + align >= 511)
 181         pos = 510 - align - (random () & 7);
 182       /* len for wcschr here isn't in bytes but it's number of wchar_t
 183          symbols.  */
 184       len = random () & 511;
 185       if ((pos == len && seek_char)
 186           || (pos > len && (random () & 1)))
 187         len = pos + 1 + (random () & 7);
 188       if (len + align >= 512)
 189         len = 511 - align - (random () & 7);
 190       if (pos == len && seek_char)
 191         len = pos + 1;
 192       j = (pos > len ? pos : len) + align + 64;
 193       if (j > 512)
 194         j = 512;
 195
 196       for (i = 0; i < j; i++)
 197         {
 198           if (i == pos + align)
 199             p[i] = seek_char;
 200           else if (i == len + align)
 201             p[i] = 0;
 202           else
 203             {
 204               p[i] = random () & 255;
 205               if (i < pos + align && p[i] == seek_char)
 206                 p[i] = seek_char + 13;
 207               if (i < len + align && !p[i])
 208                 {
 209                   p[i] = seek_char - 13;
 210                   if (!p[i])
 211                     p[i] = 140;
 212                 }
 213             }
 214         }
 215
 216       if (pos <= len)
 217         result = (CHAR *) (p + pos + align);
 218       else if (seek_char == 0)
 219         result = (CHAR *) (p + len + align);
 220       else
 221         result = NULLRET ((CHAR *) (p + len + align));
 222
 223       FOR_EACH_IMPL (impl, 1)
 224         if (CALL (impl, (CHAR *) (p + align), seek_char) != result)
 225           {
 226             error (0, 0, "Iteration %zd - wrong result in function \
 227                    %s (align in bytes: %zd, seek_char: %d, len: %zd, pos: %zd) %p != %p, p %p",
 228                    n, impl->name, align * sizeof (CHAR), seek_char, len, pos,
 229                    CALL (impl, (CHAR *) (p + align), seek_char), result, p);
 230             ret = 1;
 231           }
 232     }
 233 }
 234
 235 static void
 236 check1 (void)
 237 {
 238   char s[] __attribute__((aligned(16))) = "\xff";
 239   char c = '\xfe';
 240   char *exp_result = stupid_STRCHR (s, c);
 241
 242   FOR_EACH_IMPL (impl, 0)
 243     check_result (impl, s, c, exp_result);
 244 }
 245
 246 int
 247 test_main (void)
 248 {
 249   size_t i;
 250
 251   test_init ();
 252
 253   check1 ();
 254
 255   printf ("%20s", "");
 256   FOR_EACH_IMPL (impl, 0)
 257     printf ("\t%s", impl->name);
 258   putchar ('\n');
 259
 260   for (i = 1; i < 8; ++i)
 261     {
 262       do_test (0, 16 << i, 2048, SMALL_CHAR, MIDDLE_CHAR);
 263       do_test (i, 16 << i, 2048, SMALL_CHAR, MIDDLE_CHAR);
 264     }
 265
 266   for (i = 1; i < 8; ++i)
 267     {
 268       do_test (i, 64, 256, SMALL_CHAR, MIDDLE_CHAR);
 269       do_test (i, 64, 256, SMALL_CHAR, BIG_CHAR);
 270     }
 271
 272   for (i = 0; i < 32; ++i)
 273     {
 274       do_test (0, i, i + 1, SMALL_CHAR, MIDDLE_CHAR);
 275       do_test (0, i, i + 1, SMALL_CHAR, BIG_CHAR);
 276     }
 277
 278   for (i = 1; i < 8; ++i)
 279     {
 280       do_test (0, 16 << i, 2048, 0, MIDDLE_CHAR);
 281       do_test (i, 16 << i, 2048, 0, MIDDLE_CHAR);
 282     }
 283
 284   for (i = 1; i < 8; ++i)
 285     {
 286       do_test (i, 64, 256, 0, MIDDLE_CHAR);
 287       do_test (i, 64, 256, 0, BIG_CHAR);
 288     }
 289
 290   for (i = 0; i < 32; ++i)
 291     {
 292       do_test (0, i, i + 1, 0, MIDDLE_CHAR);
 293       do_test (0, i, i + 1, 0, BIG_CHAR);
 294     }
 295
 296   do_random_tests ();
 297   return ret;
 298 }
 299
 300 #include "../test-skeleton.c"