/* Measure strcpy 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/>.  */

#ifdef WIDE

# include <wchar.h>

# define CHAR wchar_t

# define UCHAR wchar_t

# define sfmt "ls"

# define BIG_CHAR WCHAR_MAX

# define SMALL_CHAR 1273

# define STRCMP wcscmp

# define MEMCMP wmemcmp

# define MEMSET wmemset

#else

# define CHAR char

# define UCHAR unsigned char

# define sfmt "s"

# define BIG_CHAR CHAR_MAX

# define SMALL_CHAR 127

# define STRCMP strcmp

# define MEMCMP memcmp

# define MEMSET memset

#endif

#ifndef STRCPY_RESULT

# define STRCPY_RESULT(dst, len) dst

# define TEST_MAIN

# ifndef WIDE

#  define TEST_NAME "strcpy"

# else

#  define TEST_NAME "wcscpy"

# endif

# include "bench-string.h"

# ifndef WIDE

#  define SIMPLE_STRCPY simple_strcpy

#  define STRCPY strcpy

# else

#  define SIMPLE_STRCPY simple_wcscpy

#  define STRCPY wcscpy

# endif

CHAR *SIMPLE_STRCPY (CHAR *, const CHAR *);

IMPL (SIMPLE_STRCPY, 0)

IMPL (STRCPY, 1)

CHAR *

SIMPLE_STRCPY (CHAR *dst, const CHAR *src)

{

  CHAR *ret = dst;

  while ((*dst++ = *src++) != '\0');

  return ret;

}

#endif

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

static void

do_one_test (impl_t *impl, CHAR *dst, const CHAR *src,

	     size_t len __attribute__((unused)))

{

  size_t i, iters = INNER_LOOP_ITERS;

  timing_t start, stop, cur;

  if (CALL (impl, dst, src) != STRCPY_RESULT (dst, len))

    {

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

	     CALL (impl, dst, src), STRCPY_RESULT (dst, len));

      ret = 1;

      return;

    }

  if (STRCMP (dst, src) != 0)

    {

      error (0, 0,

	     "Wrong result in function %s dst \"%" sfmt "\" src \"%" sfmt "\"",

	     impl->name, dst, src);

      ret = 1;

      return;

    }

  TIMING_NOW (start);

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

    {

	  CALL (impl, dst, src);

    }

  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 len, int max_char)

{

  size_t i;

  CHAR *s1, *s2;

/* For wcscpy: align1 and align2 here mean alignment not in bytes,

   but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t))

   len for wcschr here isn't in bytes but it's number of wchar_t symbols.  */

  align1 &= 7;

  if ((align1 + len) * sizeof(CHAR) >= page_size)

    return;

  align2 &= 7;

  if ((align2 + len) * sizeof(CHAR) >= page_size)

    return;

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

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

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

    s1[i] = 32 + 23 * i % (max_char - 32);

  s1[len] = 0;

  printf ("Length %4zd, alignments in bytes %2zd/%2zd:", len, align1 * sizeof(CHAR), align2 * sizeof(CHAR));

  FOR_EACH_IMPL (impl, 0)

    do_one_test (impl, s2, s1, len);

  putchar ('\n');

}

int

test_main (void)

{

  size_t i;

  test_init ();

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

  FOR_EACH_IMPL (impl, 0)

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

  putchar ('\n');

  for (i = 0; i < 16; ++i)

    {

      do_test (0, 0, i, SMALL_CHAR);

      do_test (0, 0, i, BIG_CHAR);

      do_test (0, i, i, SMALL_CHAR);

      do_test (i, 0, i, BIG_CHAR);

    }

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

    {

      do_test (0, 0, 8 << i, SMALL_CHAR);

      do_test (8 - i, 2 * i, 8 << i, SMALL_CHAR);

    }

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

    {

      do_test (i, 2 * i, 8 << i, SMALL_CHAR);

      do_test (2 * i, i, 8 << i, BIG_CHAR);

      do_test (i, i, 8 << i, SMALL_CHAR);

      do_test (i, i, 8 << i, BIG_CHAR);

    }

  for (i = 16; i <= 512; i+=4)

    {

      do_test (0, 4, i, SMALL_CHAR);

      do_test (4, 0, i, BIG_CHAR);

      do_test (4, 4, i, SMALL_CHAR);

      do_test (2, 2, i, BIG_CHAR);

      do_test (2, 6, i, SMALL_CHAR);

      do_test (6, 2, i, BIG_CHAR);

      do_test (1, 7, i, SMALL_CHAR);

      do_test (7, 1, i, BIG_CHAR);

      do_test (3, 4, i, SMALL_CHAR);

      do_test (4, 3, i, BIG_CHAR);

      do_test (5, 7, i, SMALL_CHAR);

      do_test (7, 5, i, SMALL_CHAR);

    }

  return ret;

}

#include <support/test-driver.c>