benchtests/bench-strpbrk.c

   1 /* Measure strpbrk functions.
   2    Copyright (C) 2013-2019 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    <https://www.gnu.org/licenses/>.  */
  18
  19 #define BIG_CHAR MAX_CHAR
  20
  21 #ifndef WIDE
  22 # define SMALL_CHAR 127
  23 #else
  24 # define SMALL_CHAR 1273
  25 #endif /* WIDE */
  26
  27 #ifndef STRPBRK_RESULT
  28 # define STRPBRK_RESULT(s, pos) ((s)[(pos)] ? (s) + (pos) : NULL)
  29 # define RES_TYPE CHAR *
  30 # define TEST_MAIN
  31 # ifndef WIDE
  32 #  define TEST_NAME "strpbrk"
  33 # else
  34 #  define TEST_NAME "wcspbrk"
  35 # endif /* WIDE */
  36 # include "bench-string.h"
  37
  38 # ifndef WIDE
  39 #  define SIMPLE_STRPBRK simple_strpbrk
  40 # else
  41 #  define SIMPLE_STRPBRK simple_wcspbrk
  42 # endif /* WIDE */
  43
  44 typedef CHAR *(*proto_t) (const CHAR *, const CHAR *);
  45 CHAR *SIMPLE_STRPBRK (const CHAR *, const CHAR *);
  46
  47 IMPL (SIMPLE_STRPBRK, 0)
  48 IMPL (STRPBRK, 1)
  49
  50 CHAR *
  51 SIMPLE_STRPBRK (const CHAR *s, const CHAR *rej)
  52 {
  53   const CHAR *r;
  54   CHAR c;
  55
  56   while ((c = *s++) != '\0')
  57     for (r = rej; *r != '\0'; ++r)
  58       if (*r == c)
  59         return (CHAR *) s - 1;
  60   return NULL;
  61 }
  62
  63 #endif /* !STRPBRK_RESULT */
  64
  65 static void
  66 do_one_test (impl_t *impl, const CHAR *s, const CHAR *rej, RES_TYPE exp_res)
  67 {
  68   RES_TYPE res = CALL (impl, s, rej);
  69   size_t i, iters = INNER_LOOP_ITERS_MEDIUM;
  70   timing_t start, stop, cur;
  71
  72   if (res != exp_res)
  73     {
  74       error (0, 0, "Wrong result in function %s %p %p", impl->name,
  75              (void *) res, (void *) exp_res);
  76       ret = 1;
  77       return;
  78     }
  79
  80   TIMING_NOW (start);
  81   for (i = 0; i < iters; ++i)
  82     {
  83       CALL (impl, s, rej);
  84     }
  85   TIMING_NOW (stop);
  86
  87   TIMING_DIFF (cur, start, stop);
  88
  89   TIMING_PRINT_MEAN ((double) cur, (double) iters);
  90 }
  91
  92 static void
  93 do_test (size_t align, size_t pos, size_t len)
  94 {
  95   size_t i;
  96   int c;
  97   RES_TYPE result;
  98   CHAR *rej, *s;
  99
 100   align &= 7;
 101   if ((align + pos + 10) * sizeof (CHAR) >= page_size || len > 240)
 102     return;
 103
 104   rej = (CHAR *) (buf2) + (random () & 255);
 105   s = (CHAR *) (buf1) + align;
 106
 107   for (i = 0; i < len; ++i)
 108     {
 109       rej[i] = random () & BIG_CHAR;
 110       if (!rej[i])
 111         rej[i] = random () & BIG_CHAR;
 112       if (!rej[i])
 113         rej[i] = 1 + (random () & SMALL_CHAR);
 114     }
 115   rej[len] = '\0';
 116   for (c = 1; c <= BIG_CHAR; ++c)
 117     if (STRCHR (rej, c) == NULL)
 118       break;
 119
 120   for (i = 0; i < pos; ++i)
 121     {
 122       s[i] = random () & BIG_CHAR;
 123       if (STRCHR (rej, s[i]))
 124         {
 125           s[i] = random () & BIG_CHAR;
 126           if (STRCHR (rej, s[i]))
 127             s[i] = c;
 128         }
 129     }
 130   s[pos] = rej[random () % (len + 1)];
 131   if (s[pos])
 132     {
 133       for (i = pos + 1; i < pos + 10; ++i)
 134         s[i] = random () & BIG_CHAR;
 135       s[i] = '\0';
 136     }
 137   result = STRPBRK_RESULT (s, pos);
 138
 139   printf ("Length %4zd, alignment %2zd, rej len %2zd:", pos, align, len);
 140
 141   FOR_EACH_IMPL (impl, 0)
 142     do_one_test (impl, s, rej, result);
 143
 144   putchar ('\n');
 145 }
 146
 147 int
 148 test_main (void)
 149 {
 150   size_t i;
 151
 152   test_init ();
 153
 154   printf ("%32s", "");
 155   FOR_EACH_IMPL (impl, 0)
 156     printf ("\t%s", impl->name);
 157   putchar ('\n');
 158
 159   for (i = 0; i < 32; ++i)
 160     {
 161       do_test (0, 512, i);
 162       do_test (i, 512, i);
 163     }
 164
 165   for (i = 1; i < 8; ++i)
 166     {
 167       do_test (0, 16 << i, 4);
 168       do_test (i, 16 << i, 4);
 169     }
 170
 171   for (i = 1; i < 8; ++i)
 172     do_test (i, 64, 10);
 173
 174   for (i = 0; i < 64; ++i)
 175     do_test (0, i, 6);
 176
 177   return ret;
 178 }
 179
 180 #include <support/test-driver.c>