/* Measure strspn 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

#ifndef WIDE

# define TEST_NAME "strspn"

#else

# define TEST_NAME "wcsspn"

#endif /* WIDE */

#include "bench-string.h"

#ifndef WIDE

# define STRSPN strspn

# define CHAR char

# define SIMPLE_STRSPN simple_strspn

# define STUPID_STRSPN stupid_strspn

# define STRLEN strlen

# define STRCHR strchr

# define BIG_CHAR CHAR_MAX

# define SMALL_CHAR 127

#else

# include <wchar.h>

# define STRSPN wcsspn

# define CHAR wchar_t

# define SIMPLE_STRSPN simple_wcsspn

# define STUPID_STRSPN stupid_wcsspn

# define STRLEN wcslen

# define STRCHR wcschr

# define BIG_CHAR WCHAR_MAX

# define SMALL_CHAR 1273

#endif /* WIDE */

typedef size_t (*proto_t) (const CHAR *, const CHAR *);

size_t SIMPLE_STRSPN (const CHAR *, const CHAR *);

size_t STUPID_STRSPN (const CHAR *, const CHAR *);

IMPL (STUPID_STRSPN, 0)

IMPL (SIMPLE_STRSPN, 0)

IMPL (STRSPN, 1)

size_t

SIMPLE_STRSPN (const CHAR *s, const CHAR *acc)

{

  const CHAR *r, *str = s;

  CHAR c;

  while ((c = *s++) != '\0')

    {

      for (r = acc; *r != '\0'; ++r)

	if (*r == c)

	  break;

      if (*r == '\0')

	return s - str - 1;

    }

  return s - str - 1;

}

size_t

STUPID_STRSPN (const CHAR *s, const CHAR *acc)

{

  size_t ns = STRLEN (s), nacc = STRLEN (acc);

  size_t i, j;

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

    {

      for (j = 0; j < nacc; ++j)

	if (s[i] == acc[j])

	  break;

      if (j == nacc)

	return i;

    }

  return i;

}

static void

do_one_test (impl_t *impl, const CHAR *s, const CHAR *acc, size_t exp_res)

{

  size_t res = CALL (impl, s, acc), i, iters = INNER_LOOP_ITERS;

  timing_t start, stop, cur;

  if (res != exp_res)

    {

      error (0, 0, "Wrong result in function %s %p %p", impl->name,

	     (void *) res, (void *) exp_res);

      ret = 1;

      return;

    }

  TIMING_NOW (start);

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

    {

      CALL (impl, s, acc);

    }

  TIMING_NOW (stop);

  TIMING_DIFF (cur, start, stop);

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

}

static void

do_test (size_t align, size_t pos, size_t len)

{

  size_t i;

  CHAR *acc, *s;

  align &= 7;

  if ((align + pos + 10) * sizeof (CHAR) >= page_size || len > 240 || ! len)

    return;

  acc = (CHAR *) (buf2) + (random () & 255);

  s = (CHAR *) (buf1) + align;

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

    {

      acc[i] = random () & BIG_CHAR;

      if (!acc[i])

	acc[i] = random () & BIG_CHAR;

      if (!acc[i])

	acc[i] = 1 + (random () & SMALL_CHAR);

    }

  acc[len] = '\0';

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

    s[i] = acc[random () % len];

  s[pos] = random () & BIG_CHAR;

  if (STRCHR (acc, s[pos]))

    s[pos] = '\0';

  else

    {

      for (i = pos + 1; i < pos + 10; ++i)

	s[i] = random () & BIG_CHAR;

      s[i] = '\0';

    }

  printf ("Length %4zd, alignment %2zd, acc len %2zd:", pos, align, len);

  FOR_EACH_IMPL (impl, 0)

    do_one_test (impl, s, acc, pos);

  putchar ('\n');

}

int

test_main (void)

{

  size_t i;

  test_init ();

  printf ("%32s", "");

  FOR_EACH_IMPL (impl, 0)

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

  putchar ('\n');

  for (i = 0; i < 32; ++i)

    {

      do_test (0, 512, i);

      do_test (i, 512, i);

    }

  for (i = 1; i < 8; ++i)

    {

      do_test (0, 16 << i, 4);

      do_test (i, 16 << i, 4);

    }

  for (i = 1; i < 8; ++i)

    do_test (i, 64, 10);

  for (i = 0; i < 64; ++i)

    do_test (0, i, 6);

  return ret;

}

#include <support/test-driver.c>