string/test-strcpy.c

   1 /* Test and measure strcpy functions.
   2    Copyright (C) 1999-2012 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 wcscpy 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 #ifdef WIDE
  22 # include <wchar.h>
  23 # define CHAR wchar_t
  24 # define UCHAR wchar_t
  25 # define sfmt "ls"
  26 # define BIG_CHAR WCHAR_MAX
  27 # define SMALL_CHAR 1273
  28 # define STRCMP wcscmp
  29 # define MEMCMP wmemcmp
  30 # define MEMSET wmemset
  31 #else
  32 # define CHAR char
  33 # define UCHAR unsigned char
  34 # define sfmt "s"
  35 # define BIG_CHAR CHAR_MAX
  36 # define SMALL_CHAR 127
  37 # define STRCMP strcmp
  38 # define MEMCMP memcmp
  39 # define MEMSET memset
  40 #endif
  41
  42 #ifndef STRCPY_RESULT
  43 # define STRCPY_RESULT(dst, len) dst
  44 # define TEST_MAIN
  45 # ifndef WIDE
  46 #  define TEST_NAME "strcpy"
  47 # else
  48 #  define TEST_NAME "wcscpy"
  49 # endif
  50 # include "test-string.h"
  51 # ifndef WIDE
  52 #  define SIMPLE_STRCPY simple_strcpy
  53 #  define STRCPY strcpy
  54 # else
  55 #  define SIMPLE_STRCPY simple_wcscpy
  56 #  define STRCPY wcscpy
  57 # endif
  58
  59 CHAR *SIMPLE_STRCPY (CHAR *, const CHAR *);
  60
  61 IMPL (SIMPLE_STRCPY, 0)
  62 IMPL (STRCPY, 1)
  63
  64 CHAR *
  65 SIMPLE_STRCPY (CHAR *dst, const CHAR *src)
  66 {
  67   CHAR *ret = dst;
  68   while ((*dst++ = *src++) != '\0');
  69   return ret;
  70 }
  71 #endif
  72
  73 typedef CHAR *(*proto_t) (CHAR *, const CHAR *);
  74
  75 static void
  76 do_one_test (impl_t *impl, CHAR *dst, const CHAR *src,
  77              size_t len __attribute__((unused)))
  78 {
  79   if (CALL (impl, dst, src) != STRCPY_RESULT (dst, len))
  80     {
  81       error (0, 0, "Wrong result in function %s %p %p", impl->name,
  82              CALL (impl, dst, src), STRCPY_RESULT (dst, len));
  83       ret = 1;
  84       return;
  85     }
  86
  87   if (STRCMP (dst, src) != 0)
  88     {
  89       error (0, 0,
  90              "Wrong result in function %s dst \"%" sfmt "\" src \"%" sfmt "\"",
  91              impl->name, dst, src);
  92       ret = 1;
  93       return;
  94     }
  95
  96   if (HP_TIMING_AVAIL)
  97     {
  98       hp_timing_t start __attribute ((unused));
  99       hp_timing_t stop __attribute ((unused));;
 100       hp_timing_t best_time = ~ (hp_timing_t) 0;
 101       size_t i;
 102
 103       for (i = 0; i < 32; ++i)
 104         {
 105           HP_TIMING_NOW (start);
 106           CALL (impl, dst, src);
 107           HP_TIMING_NOW (stop);
 108           HP_TIMING_BEST (best_time, start, stop);
 109         }
 110
 111       printf ("\t%zd", (size_t) best_time);
 112     }
 113 }
 114
 115 static void
 116 do_test (size_t align1, size_t align2, size_t len, int max_char)
 117 {
 118   size_t i;
 119   CHAR *s1, *s2;
 120 /* For wcscpy: align1 and align2 here mean alignment not in bytes,
 121    but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t))
 122    len for wcschr here isn't in bytes but it's number of wchar_t symbols.  */
 123   align1 &= 7;
 124   if ((align1 + len) * sizeof(CHAR) >= page_size)
 125     return;
 126
 127   align2 &= 7;
 128   if ((align2 + len) * sizeof(CHAR) >= page_size)
 129     return;
 130
 131   s1 = (CHAR *) (buf1) + align1;
 132   s2 = (CHAR *) (buf2) + align2;
 133
 134   for (i = 0; i < len; i++)
 135     s1[i] = 32 + 23 * i % (max_char - 32);
 136   s1[len] = 0;
 137
 138   if (HP_TIMING_AVAIL)
 139     printf ("Length %4zd, alignments in bytes %2zd/%2zd:", len, align1 * sizeof(CHAR), align2 * sizeof(CHAR));
 140
 141   FOR_EACH_IMPL (impl, 0)
 142     do_one_test (impl, s2, s1, len);
 143
 144   if (HP_TIMING_AVAIL)
 145     putchar ('\n');
 146 }
 147
 148 static void
 149 do_random_tests (void)
 150 {
 151   size_t i, j, n, align1, align2, len;
 152   UCHAR *p1 = (UCHAR *) (buf1 + page_size) - 512;
 153   UCHAR *p2 = (UCHAR *) (buf2 + page_size) - 512;
 154   UCHAR *res;
 155
 156   for (n = 0; n < ITERATIONS; n++)
 157     {
 158       /* For wcsrchr: align1 and align2 here mean align not in bytes,
 159          but in wchar_ts, in bytes it will equal to align * (sizeof
 160          (wchar_t)).  For strrchr we need to check all alignments from
 161          0 to 63 since some assembly implementations have separate
 162          prolog for alignments more 48. */
 163
 164       align1 = random () & (63 / sizeof(CHAR));
 165       if (random () & 1)
 166         align2 = random () & (63 / sizeof(CHAR));
 167       else
 168         align2 = align1 + (random () & 24);
 169       len = random () & 511;
 170       j = align1;
 171       if (align2 > j)
 172         j = align2;
 173       if (len + j >= 511)
 174         len = 510 - j - (random () & 7);
 175       j = len + align1 + 64;
 176       if (j > 512)
 177         j = 512;
 178       for (i = 0; i < j; i++)
 179         {
 180           if (i == len + align1)
 181             p1[i] = 0;
 182           else
 183             {
 184               p1[i] = random () & BIG_CHAR;
 185               if (i >= align1 && i < len + align1 && !p1[i])
 186                 p1[i] = (random () & SMALL_CHAR) + 3;
 187             }
 188         }
 189
 190       FOR_EACH_IMPL (impl, 1)
 191         {
 192           MEMSET (p2 - 64, '\1', 512 + 64);
 193           res = (UCHAR *) CALL (impl, (CHAR *) (p2 + align2), (CHAR *) (p1 + align1));
 194           if (res != STRCPY_RESULT (p2 + align2, len))
 195             {
 196               error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p",
 197                      n, impl->name, align1, align2, len, res,
 198                      STRCPY_RESULT (p2 + align2, len));
 199               ret = 1;
 200             }
 201           for (j = 0; j < align2 + 64; ++j)
 202             {
 203               if (p2[j - 64] != '\1')
 204                 {
 205                   error (0, 0, "Iteration %zd - garbage before, %s (%zd, %zd, %zd)",
 206                          n, impl->name, align1, align2, len);
 207                   ret = 1;
 208                   break;
 209                 }
 210             }
 211           for (j = align2 + len + 1; j < 512; ++j)
 212             {
 213               if (p2[j] != '\1')
 214                 {
 215                   error (0, 0, "Iteration %zd - garbage after, %s (%zd, %zd, %zd)",
 216                          n, impl->name, align1, align2, len);
 217                   ret = 1;
 218                   break;
 219                 }
 220             }
 221           if (MEMCMP (p1 + align1, p2 + align2, len + 1))
 222             {
 223               error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd)",
 224                      n, impl->name, align1, align2, len);
 225               ret = 1;
 226             }
 227         }
 228     }
 229 }
 230
 231 int
 232 test_main (void)
 233 {
 234   size_t i;
 235
 236   test_init ();
 237
 238   printf ("%23s", "");
 239   FOR_EACH_IMPL (impl, 0)
 240     printf ("\t%s", impl->name);
 241   putchar ('\n');
 242
 243   for (i = 0; i < 16; ++i)
 244     {
 245       do_test (0, 0, i, SMALL_CHAR);
 246       do_test (0, 0, i, BIG_CHAR);
 247       do_test (0, i, i, SMALL_CHAR);
 248       do_test (i, 0, i, BIG_CHAR);
 249     }
 250
 251   for (i = 1; i < 8; ++i)
 252     {
 253       do_test (0, 0, 8 << i, SMALL_CHAR);
 254       do_test (8 - i, 2 * i, 8 << i, SMALL_CHAR);
 255     }
 256
 257   for (i = 1; i < 8; ++i)
 258     {
 259       do_test (i, 2 * i, 8 << i, SMALL_CHAR);
 260       do_test (2 * i, i, 8 << i, BIG_CHAR);
 261       do_test (i, i, 8 << i, SMALL_CHAR);
 262       do_test (i, i, 8 << i, BIG_CHAR);
 263     }
 264
 265   do_random_tests ();
 266   return ret;
 267 }
 268
 269 #include "../test-skeleton.c"