/* Measure strtok functions.

   Copyright (C) 2013-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#define TEST_MAIN

#define TEST_NAME "strtok"

#include "bench-string.h"

char *

oldstrtok (char *s, const char *delim)

{

  static char *olds;

  char *token;

  if (s == NULL)

    s = olds;

  /* Scan leading delimiters.  */

  s += strspn (s, delim);

  if (*s == '\0')

    {

      olds = s;

      return NULL;

    }

  /* Find the end of the token.  */

  token = s;

  s = strpbrk (token, delim);

  if (s == NULL)

    /* This token finishes the string.  */

    olds = rawmemchr (token, '\0');

  else

    {

      /* Terminate the token and make OLDS point past it.  */

      *s = '\0';

      olds = s + 1;

    }

  return token;

}

typedef char *(*proto_t) (const char *, const char *);

IMPL (oldstrtok, 0)

IMPL (strtok, 1)

static void

do_one_test (impl_t * impl, const char *s1, const char *s2)

{

  size_t i, iters = INNER_LOOP_ITERS;

  timing_t start, stop, cur;

  TIMING_NOW (start);

  for (i = 0; i < iters; ++i)

    {

      CALL (impl, s1, s2);

      CALL (impl, NULL, s2);

      CALL (impl, NULL, s2);

    }

  TIMING_NOW (stop);

  TIMING_DIFF (cur, start, stop);

  TIMING_PRINT_MEAN ((double) cur, (double) iters);

}

static void

do_test (size_t align1, size_t align2, size_t len1, size_t len2, int fail)

{

  char *s2 = (char *) (buf2 + align2);

  static const char d[] = "1234567890abcdef";

#define dl (sizeof (d) - 1)

  char *ss2 = s2;

  for (size_t l = len2; l > 0; l = l > dl ? l - dl : 0)

    {

      size_t t = l > dl ? dl : l;

      ss2 = mempcpy (ss2, d, t);

    }

  s2[len2] = '\0';

  printf ("Length %4zd/%zd, alignment %2zd/%2zd, %s:",

	  len1, len2, align1, align2, fail ? "fail" : "found");

  FOR_EACH_IMPL (impl, 0)

  {

    char *s1 = (char *) (buf1 + align1);

    if (fail)

      {

	char *ss1 = s1;

	for (size_t l = len1; l > 0; l = l > dl ? l - dl : 0)

	  {

	    size_t t = l > dl ? dl : l;

	    memcpy (ss1, d, t);

	    ++ss1[len2 > 7 ? 7 : len2 - 1];

	    ss1 += t;

	  }

      }

    else

      {

	memset (s1, '0', len1);

	memcpy (s1 + (len1 - len2) - 2, s2, len2);

	if ((len1 / len2) > 4)

	  memcpy (s1 + (len1 - len2) - (3 * len2), s2, len2);

      }

    s1[len1] = '\0';

    do_one_test (impl, s1, s2);

  }

  putchar ('\n');

}

static int

test_main (void)

{

  test_init ();

  printf ("%23s", "");

  FOR_EACH_IMPL (impl, 0)

    printf ("\t%s", impl->name);

  putchar ('\n');

  for (size_t klen = 2; klen < 32; ++klen)

    for (size_t hlen = 2 * klen; hlen < 16 * klen; hlen += klen)

      {

	do_test (0, 0, hlen, klen, 0);

	do_test (0, 0, hlen, klen, 1);

	do_test (0, 3, hlen, klen, 0);

	do_test (0, 3, hlen, klen, 1);

	do_test (0, 9, hlen, klen, 0);

	do_test (0, 9, hlen, klen, 1);

	do_test (0, 15, hlen, klen, 0);

	do_test (0, 15, hlen, klen, 1);

	do_test (3, 0, hlen, klen, 0);

	do_test (3, 0, hlen, klen, 1);

	do_test (3, 3, hlen, klen, 0);

	do_test (3, 3, hlen, klen, 1);

	do_test (3, 9, hlen, klen, 0);

	do_test (3, 9, hlen, klen, 1);

	do_test (3, 15, hlen, klen, 0);

	do_test (3, 15, hlen, klen, 1);

	do_test (9, 0, hlen, klen, 0);

	do_test (9, 0, hlen, klen, 1);

	do_test (9, 3, hlen, klen, 0);

	do_test (9, 3, hlen, klen, 1);

	do_test (9, 9, hlen, klen, 0);

	do_test (9, 9, hlen, klen, 1);

	do_test (9, 15, hlen, klen, 0);

	do_test (9, 15, hlen, klen, 1);

	do_test (15, 0, hlen, klen, 0);

	do_test (15, 0, hlen, klen, 1);

	do_test (15, 3, hlen, klen, 0);

	do_test (15, 3, hlen, klen, 1);

	do_test (15, 9, hlen, klen, 0);

	do_test (15, 9, hlen, klen, 1);

	do_test (15, 15, hlen, klen, 0);

	do_test (15, 15, hlen, klen, 1);

      }

  do_test (0, 0, page_size - 1, 16, 0);

  do_test (0, 0, page_size - 1, 16, 1);

  return ret;

}

#include <support/test-driver.c>