/* Measure strncasecmp 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/>.  */

#include <ctype.h>

#define TEST_MAIN

#define TEST_NAME "strncasecmp"

#include "bench-string.h"

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

static int simple_strncasecmp (const char *, const char *, size_t);

static int stupid_strncasecmp (const char *, const char *, size_t);

IMPL (stupid_strncasecmp, 0)

IMPL (simple_strncasecmp, 0)

IMPL (strncasecmp, 1)

static int

simple_strncasecmp (const char *s1, const char *s2, size_t n)

{

  int ret;

  if (n == 0)

    return 0;

  while ((ret = ((unsigned char) tolower (*s1)

		 - (unsigned char) tolower (*s2))) == 0

	 && *s1++)

    {

      if (--n == 0)

	return 0;

      ++s2;

    }

  return ret;

}

static int

stupid_strncasecmp (const char *s1, const char *s2, size_t max)

{

  size_t ns1 = strlen (s1) + 1;

  size_t ns2 = strlen (s2) + 1;

  size_t n = ns1 < ns2 ? ns1 : ns2;

  if (n > max)

    n = max;

  int ret = 0;

  while (n--)

    {

      if ((ret = ((unsigned char) tolower (*s1)

		  - (unsigned char) tolower (*s2))) != 0)

	break;

      ++s1;

      ++s2;

    }

  return ret;

}

static void

do_one_test (impl_t *impl, const char *s1, const char *s2, size_t n,

	     int exp_result)

{

  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, n);

    }

  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 n, size_t len, int max_char,

	 int exp_result)

{

  size_t i;

  char *s1, *s2;

  if (len == 0)

    return;

  align1 &= 7;

  if (align1 + len + 1 >= page_size)

    return;

  align2 &= 7;

  if (align2 + len + 1 >= page_size)

    return;

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

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

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

    {

      s1[i] = toupper (1 + 23 * i % max_char);

      s2[i] = tolower (s1[i]);

    }

  s1[len] = s2[len] = 0;

  s1[len + 1] = 23;

  s2[len + 1] = 24 + exp_result;

  if ((s2[len - 1] == 'z' && exp_result == -1)

      || (s2[len - 1] == 'a' && exp_result == 1))

    s1[len - 1] += exp_result;

  else

    s2[len - 1] -= exp_result;

  printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2);

  FOR_EACH_IMPL (impl, 0)

    do_one_test (impl, s1, s2, n, exp_result);

  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 = 1; i < 16; ++i)

    {

      do_test (i, i, i - 1, i, 127, 0);

      do_test (i, i, i, i, 127, 0);

      do_test (i, i, i, i, 127, 1);

      do_test (i, i, i, i, 127, -1);

      do_test (i, i, i + 1, i, 127, 0);

      do_test (i, i, i + 1, i, 127, 1);

      do_test (i, i, i + 1, i, 127, -1);

    }

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

    {

      do_test (0, 0, (2 << i) - 1, 2 << i, 127, 0);

      do_test (0, 0, 2 << i, 2 << i, 254, 0);

      do_test (0, 0, (2 << i) + 1, 2 << i, 127, 0);

      do_test (0, 0, (2 << i) + 1, 2 << i, 254, 0);

      do_test (0, 0, 2 << i, 2 << i, 127, 1);

      do_test (0, 0, (2 << i) + 10, 2 << i, 127, 1);

      do_test (0, 0, 2 << i, 2 << i, 254, 1);

      do_test (0, 0, (2 << i) + 10, 2 << i, 254, 1);

      do_test (0, 0, 2 << i, 2 << i, 127, -1);

      do_test (0, 0, (2 << i) + 10, 2 << i, 127, -1);

      do_test (0, 0, 2 << i, 2 << i, 254, -1);

      do_test (0, 0, (2 << i) + 10, 2 << i, 254, -1);

    }

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

    {

      do_test (i, 2 * i, (8 << i) - 1, 8 << i, 127, 0);

      do_test (i, 2 * i, 8 << i, 8 << i, 127, 0);

      do_test (i, 2 * i, (8 << i) + 100, 8 << i, 127, 0);

      do_test (2 * i, i, (8 << i) - 1, 8 << i, 254, 0);

      do_test (2 * i, i, 8 << i, 8 << i, 254, 0);

      do_test (2 * i, i, (8 << i) + 100, 8 << i, 254, 0);

      do_test (i, 2 * i, 8 << i, 8 << i, 127, 1);

      do_test (i, 2 * i, (8 << i) + 100, 8 << i, 127, 1);

      do_test (2 * i, i, 8 << i, 8 << i, 254, 1);

      do_test (2 * i, i, (8 << i) + 100, 8 << i, 254, 1);

      do_test (i, 2 * i, 8 << i, 8 << i, 127, -1);

      do_test (i, 2 * i, (8 << i) + 100, 8 << i, 127, -1);

      do_test (2 * i, i, 8 << i, 8 << i, 254, -1);

      do_test (2 * i, i, (8 << i) + 100, 8 << i, 254, -1);

    }

  return ret;

}

#include <support/test-driver.c>