/* Measure STRLEN 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 "strlen"

#else

# define TEST_NAME "wcslen"

#endif

#include "bench-string.h"

#ifndef WIDE

# define STRLEN strlen

# define CHAR char

# define MAX_CHAR CHAR_MAX

#else

# include <wchar.h>

# define STRLEN wcslen

# define CHAR wchar_t

# define MAX_CHAR WCHAR_MAX

#endif

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

size_t

simple_STRLEN (const CHAR *s)

{

  const CHAR *p;

  for (p = s; *p; ++p);

  return p - s;

}

#ifndef WIDE

size_t

builtin_strlen (const CHAR *p)

{

  return __builtin_strlen (p);

}

IMPL (builtin_strlen, 0)

#endif

IMPL (simple_STRLEN, 0)

IMPL (STRLEN, 1)

static void

do_one_test (impl_t *impl, const CHAR *s, size_t exp_len)

{

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

  timing_t start, stop, cur;

  if (len != exp_len)

    {

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

	     len, exp_len);

      ret = 1;

      return;

    }

  TIMING_NOW (start);

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

    {

      CALL (impl, s);

    }

  TIMING_NOW (stop);

  TIMING_DIFF (cur, start, stop);

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

}

static void

do_test (size_t align, size_t len)

{

  size_t i;

  align &= 63;

  if (align + sizeof(CHAR) * len >= page_size)

    return;

  CHAR *buf = (CHAR *) (buf1);

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

    buf[align + i] = 1 + 11111 * i % MAX_CHAR;

  buf[align + len] = 0;

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

  FOR_EACH_IMPL (impl, 0)

    do_one_test (impl, (CHAR *) (buf + align), len);

  putchar ('\n');

}

int

test_main (void)

{

  size_t i;

  test_init ();

  printf ("%20s", "");

  FOR_EACH_IMPL (impl, 0)

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

  putchar ('\n');

  /* Checking with only 4 * N alignments for wcslen, other alignments are wrong for wchar_t type arrays*/

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

  {

    do_test (sizeof(CHAR) * i, i);

    do_test (0, i);

  }

  for (i = 2; i <= 12; ++i)

    {

      do_test (0, 1 << i);

      do_test (sizeof(CHAR) * 7, 1 << i);

      do_test (sizeof(CHAR) * i, 1 << i);

      do_test (sizeof(CHAR) * i, (size_t)((1 << i) / 1.5));

    }

  return ret;

}

#include <support/test-driver.c>