benchtests/bench-strpbrk.c

   1 /* Measure strpbrk functions.
   2    Copyright (C) 2013-2017 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef WIDE
  20 # define CHAR char
  21 # define STRLEN strlen
  22 # define STRCHR strchr
  23 # define BIG_CHAR CHAR_MAX
  24 # define SMALL_CHAR 127
  25 #else
  26 # include <wchar.h>
  27 # define CHAR wchar_t
  28 # define STRLEN wcslen
  29 # define STRCHR wcschr
  30 # define BIG_CHAR WCHAR_MAX
  31 # define SMALL_CHAR 1273
  32 #endif /* WIDE */
  33
  34 #ifndef STRPBRK_RESULT
  35 # define STRPBRK_RESULT(s, pos) ((s)[(pos)] ? (s) + (pos) : NULL)
  36 # define RES_TYPE CHAR *
  37 # define TEST_MAIN
  38 # ifndef WIDE
  39 #  define TEST_NAME "strpbrk"
  40 # else
  41 #  define TEST_NAME "wcspbrk"
  42 # endif /* WIDE */
  43 # include "bench-string.h"
  44
  45 # ifndef WIDE
  46 #  define STRPBRK strpbrk
  47 #  define SIMPLE_STRPBRK simple_strpbrk
  48 #  define STUPID_STRPBRK stupid_strpbrk
  49 # else
  50 #  include <wchar.h>
  51 #  define STRPBRK wcspbrk
  52 #  define SIMPLE_STRPBRK simple_wcspbrk
  53 #  define STUPID_STRPBRK stupid_wcspbrk
  54 # endif /* WIDE */
  55
  56 typedef CHAR *(*proto_t) (const CHAR *, const CHAR *);
  57 CHAR *SIMPLE_STRPBRK (const CHAR *, const CHAR *);
  58 CHAR *STUPID_STRPBRK (const CHAR *, const CHAR *);
  59
  60 IMPL (STUPID_STRPBRK, 0)
  61 IMPL (SIMPLE_STRPBRK, 0)
  62 IMPL (STRPBRK, 1)
  63
  64 CHAR *
  65 SIMPLE_STRPBRK (const CHAR *s, const CHAR *rej)
  66 {
  67   const CHAR *r;
  68   CHAR c;
  69
  70   while ((c = *s++) != '\0')
  71     for (r = rej; *r != '\0'; ++r)
  72       if (*r == c)
  73         return (CHAR *) s - 1;
  74   return NULL;
  75 }
  76
  77 CHAR *
  78 STUPID_STRPBRK (const CHAR *s, const CHAR *rej)
  79 {
  80   size_t ns = STRLEN (s), nrej = STRLEN (rej);
  81   size_t i, j;
  82
  83   for (i = 0; i < ns; ++i)
  84     for (j = 0; j < nrej; ++j)
  85       if (s[i] == rej[j])
  86         return (CHAR *) s + i;
  87   return NULL;
  88 }
  89 #endif /* !STRPBRK_RESULT */
  90
  91 static void
  92 do_one_test (impl_t *impl, const CHAR *s, const CHAR *rej, RES_TYPE exp_res)
  93 {
  94   RES_TYPE res = CALL (impl, s, rej);
  95   size_t i, iters = INNER_LOOP_ITERS;
  96   timing_t start, stop, cur;
  97
  98   if (res != exp_res)
  99     {
 100       error (0, 0, "Wrong result in function %s %p %p", impl->name,
 101              (void *) res, (void *) exp_res);
 102       ret = 1;
 103       return;
 104     }
 105
 106   TIMING_NOW (start);
 107   for (i = 0; i < iters; ++i)
 108     {
 109       CALL (impl, s, rej);
 110     }
 111   TIMING_NOW (stop);
 112
 113   TIMING_DIFF (cur, start, stop);
 114
 115   TIMING_PRINT_MEAN ((double) cur, (double) iters);
 116 }
 117
 118 static void
 119 do_test (size_t align, size_t pos, size_t len)
 120 {
 121   size_t i;
 122   int c;
 123   RES_TYPE result;
 124   CHAR *rej, *s;
 125
 126   align &= 7;
 127   if ((align + pos + 10) * sizeof (CHAR) >= page_size || len > 240)
 128     return;
 129
 130   rej = (CHAR *) (buf2) + (random () & 255);
 131   s = (CHAR *) (buf1) + align;
 132
 133   for (i = 0; i < len; ++i)
 134     {
 135       rej[i] = random () & BIG_CHAR;
 136       if (!rej[i])
 137         rej[i] = random () & BIG_CHAR;
 138       if (!rej[i])
 139         rej[i] = 1 + (random () & SMALL_CHAR);
 140     }
 141   rej[len] = '\0';
 142   for (c = 1; c <= BIG_CHAR; ++c)
 143     if (STRCHR (rej, c) == NULL)
 144       break;
 145
 146   for (i = 0; i < pos; ++i)
 147     {
 148       s[i] = random () & BIG_CHAR;
 149       if (STRCHR (rej, s[i]))
 150         {
 151           s[i] = random () & BIG_CHAR;
 152           if (STRCHR (rej, s[i]))
 153             s[i] = c;
 154         }
 155     }
 156   s[pos] = rej[random () % (len + 1)];
 157   if (s[pos])
 158     {
 159       for (i = pos + 1; i < pos + 10; ++i)
 160         s[i] = random () & BIG_CHAR;
 161       s[i] = '\0';
 162     }
 163   result = STRPBRK_RESULT (s, pos);
 164
 165   printf ("Length %4zd, alignment %2zd, rej len %2zd:", pos, align, len);
 166
 167   FOR_EACH_IMPL (impl, 0)
 168     do_one_test (impl, s, rej, result);
 169
 170   putchar ('\n');
 171 }
 172
 173 int
 174 test_main (void)
 175 {
 176   size_t i;
 177
 178   test_init ();
 179
 180   printf ("%32s", "");
 181   FOR_EACH_IMPL (impl, 0)
 182     printf ("\t%s", impl->name);
 183   putchar ('\n');
 184
 185   for (i = 0; i < 32; ++i)
 186     {
 187       do_test (0, 512, i);
 188       do_test (i, 512, i);
 189     }
 190
 191   for (i = 1; i < 8; ++i)
 192     {
 193       do_test (0, 16 << i, 4);
 194       do_test (i, 16 << i, 4);
 195     }
 196
 197   for (i = 1; i < 8; ++i)
 198     do_test (i, 64, 10);
 199
 200   for (i = 0; i < 64; ++i)
 201     do_test (0, i, 6);
 202
 203   return ret;
 204 }
 205
 206 #include <support/test-driver.c>