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, write to the Free
  19    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  20    02111-1307 USA.  */
  21
  22 #define TEST_MAIN
  23 #include "test-string.h"
  24
  25 #ifndef WIDE
  26 # ifdef USE_FOR_STRCHRNUL
  27 #  define STRCHR strchrnul
  28 #  define stupid_STRCHR stupid_STRCHRNUL
  29 #  define simple_STRCHR simple_STRCHRNUL
  30 # else
  31 #  define STRCHR strchr
  32 # endif
  33 # define STRLEN strlen
  34 # define CHAR char
  35 # define BIG_CHAR CHAR_MAX
  36 # define MIDDLE_CHAR 127
  37 # define SMALL_CHAR 23
  38 # define UCHAR unsigned char
  39 #else
  40 # include <wchar.h>
  41 # define STRCHR wcschr
  42 # define STRLEN wcslen
  43 # define CHAR wchar_t
  44 # define BIG_CHAR WCHAR_MAX
  45 # define MIDDLE_CHAR 1121
  46 # define SMALL_CHAR 851
  47 # define UCHAR wchar_t
  48 #endif
  49
  50 #ifdef USE_FOR_STRCHRNUL
  51 # define NULLRET(endptr) endptr
  52 #else
  53 # define NULLRET(endptr) NULL
  54 #endif
  55
  56
  57 typedef CHAR *(*proto_t) (const CHAR *, int);
  58
  59 CHAR *
  60 simple_STRCHR (const CHAR *s, int c)
  61 {
  62   for (; *s != (CHAR) c; ++s)
  63     if (*s == '\0')
  64       return NULLRET ((CHAR *) s);
  65   return (CHAR *) s;
  66 }
  67
  68 CHAR *
  69 stupid_STRCHR (const CHAR *s, int c)
  70 {
  71   size_t n = STRLEN (s) + 1;
  72
  73   while (n--)
  74     if (*s++ == (CHAR) c)
  75       return (CHAR *) s - 1;
  76   return NULLRET ((CHAR *) s - 1);
  77 }
  78
  79 IMPL (stupid_STRCHR, 0)
  80 IMPL (simple_STRCHR, 0)
  81 IMPL (STRCHR, 1)
  82
  83 static void
  84 do_one_test (impl_t *impl, const CHAR *s, int c, const CHAR *exp_res)
  85 {
  86   CHAR *res = CALL (impl, s, c);
  87   if (res != exp_res)
  88     {
  89       error (0, 0, "Wrong result in function %s %#x %p %p", impl->name,
  90              c, res, exp_res);
  91       ret = 1;
  92       return;
  93     }
  94
  95   if (HP_TIMING_AVAIL)
  96     {
  97       hp_timing_t start __attribute ((unused));
  98       hp_timing_t stop __attribute ((unused));
  99       hp_timing_t best_time = ~ (hp_timing_t) 0;
 100       size_t i;
 101
 102       for (i = 0; i < 32; ++i)
 103         {
 104           HP_TIMING_NOW (start);
 105           CALL (impl, s, c);
 106           HP_TIMING_NOW (stop);
 107           HP_TIMING_BEST (best_time, start, stop);
 108         }
 109
 110       printf ("\t%zd", (size_t) best_time);
 111     }
 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   if (HP_TIMING_AVAIL)
 148     printf ("Length %4zd, alignment in bytes %2zd:",
 149             pos, align * sizeof (CHAR));
 150
 151   FOR_EACH_IMPL (impl, 0)
 152     do_one_test (impl, buf + align, seek_char, result);
 153
 154   if (HP_TIMING_AVAIL)
 155     putchar ('\n');
 156 }
 157
 158 static void
 159 do_random_tests (void)
 160 {
 161   size_t i, j, n, align, pos, len;
 162   int seek_char;
 163   CHAR *result;
 164   UCHAR *p = (UCHAR *) (buf1 + page_size - 512 * sizeof (CHAR));
 165
 166   for (n = 0; n < ITERATIONS; n++)
 167     {
 168       /* For wcschr: align here means align not in bytes, but in wchar_ts,
 169          in bytes it will equal to align * (sizeof (wchar_t)).  */
 170       align = random () & 15;
 171       pos = random () & 511;
 172       seek_char = random () & 255;
 173       if (pos + align >= 511)
 174         pos = 510 - align - (random () & 7);
 175       /* len for wcschr here isn't in bytes but it's number of wchar_t
 176          symbols.  */
 177       len = random () & 511;
 178       if ((pos == len && seek_char)
 179           || (pos > len && (random () & 1)))
 180         len = pos + 1 + (random () & 7);
 181       if (len + align >= 512)
 182         len = 511 - align - (random () & 7);
 183       if (pos == len && seek_char)
 184         len = pos + 1;
 185       j = (pos > len ? pos : len) + align + 64;
 186       if (j > 512)
 187         j = 512;
 188
 189       for (i = 0; i < j; i++)
 190         {
 191           if (i == pos + align)
 192             p[i] = seek_char;
 193           else if (i == len + align)
 194             p[i] = 0;
 195           else
 196             {
 197               p[i] = random () & 255;
 198               if (i < pos + align && p[i] == seek_char)
 199                 p[i] = seek_char + 13;
 200               if (i < len + align && !p[i])
 201                 {
 202                   p[i] = seek_char - 13;
 203                   if (!p[i])
 204                     p[i] = 140;
 205                 }
 206             }
 207         }
 208
 209       if (pos <= len)
 210         result = (CHAR *) (p + pos + align);
 211       else if (seek_char == 0)
 212         result = (CHAR *) (p + len + align);
 213       else
 214         result = NULLRET ((CHAR *) (p + len + align));
 215
 216       FOR_EACH_IMPL (impl, 1)
 217         if (CALL (impl, (CHAR *) (p + align), seek_char) != result)
 218           {
 219             error (0, 0, "Iteration %zd - wrong result in function \
 220                    %s (align in bytes: %zd, seek_char: %d, len: %zd, pos: %zd) %p != %p, p %p",
 221                    n, impl->name, align * sizeof (CHAR), seek_char, len, pos,
 222                    CALL (impl, (CHAR *) (p + align), seek_char), result, p);
 223             ret = 1;
 224           }
 225     }
 226 }
 227
 228 int
 229 test_main (void)
 230 {
 231   size_t i;
 232
 233   test_init ();
 234
 235   printf ("%20s", "");
 236   FOR_EACH_IMPL (impl, 0)
 237     printf ("\t%s", impl->name);
 238   putchar ('\n');
 239
 240   for (i = 1; i < 8; ++i)
 241     {
 242       do_test (0, 16 << i, 2048, SMALL_CHAR, MIDDLE_CHAR);
 243       do_test (i, 16 << i, 2048, SMALL_CHAR, MIDDLE_CHAR);
 244     }
 245
 246   for (i = 1; i < 8; ++i)
 247     {
 248       do_test (i, 64, 256, SMALL_CHAR, MIDDLE_CHAR);
 249       do_test (i, 64, 256, SMALL_CHAR, BIG_CHAR);
 250     }
 251
 252   for (i = 0; i < 32; ++i)
 253     {
 254       do_test (0, i, i + 1, SMALL_CHAR, MIDDLE_CHAR);
 255       do_test (0, i, i + 1, SMALL_CHAR, BIG_CHAR);
 256     }
 257
 258   for (i = 1; i < 8; ++i)
 259     {
 260       do_test (0, 16 << i, 2048, 0, MIDDLE_CHAR);
 261       do_test (i, 16 << i, 2048, 0, MIDDLE_CHAR);
 262     }
 263
 264   for (i = 1; i < 8; ++i)
 265     {
 266       do_test (i, 64, 256, 0, MIDDLE_CHAR);
 267       do_test (i, 64, 256, 0, BIG_CHAR);
 268     }
 269
 270   for (i = 0; i < 32; ++i)
 271     {
 272       do_test (0, i, i + 1, 0, MIDDLE_CHAR);
 273       do_test (0, i, i + 1, 0, BIG_CHAR);
 274     }
 275
 276   do_random_tests ();
 277   return ret;
 278 }
 279
 280 #include "../test-skeleton.c"