/* Test and measure strcasestr functions.

   Copyright (C) 2010-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Written by Ulrich Drepper <drepper@redhat.com>, 2010.

   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 "strcasestr"

#include "test-string.h"

#define STRCASESTR simple_strcasestr

#define NO_ALIAS

#define __strncasecmp strncasecmp

#define __strnlen strnlen

#include "strcasestr.c"

static char *

stupid_strcasestr (const char *s1, const char *s2)

{

  ssize_t s1len = strlen (s1);

  ssize_t s2len = strlen (s2);

  if (s2len > s1len)

    return NULL;

  for (ssize_t i = 0; i <= s1len - s2len; ++i)

    {

      size_t j;

      for (j = 0; j < s2len; ++j)

	if (tolower (s1[i + j]) != tolower (s2[j]))

	  break;

      if (j == s2len)

	return (char *) s1 + i;

    }

  return NULL;

}

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

IMPL (stupid_strcasestr, 0)

IMPL (simple_strcasestr, 0)

IMPL (strcasestr, 1)

static int

check_result (impl_t *impl, const char *s1, const char *s2,

	      char *exp_result)

{

  char *result = CALL (impl, s1, s2);

  if (result != exp_result)

    {

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

	     result, exp_result);

      ret = 1;

      return -1;

    }

  return 0;

}

static void

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

{

  if (check_result (impl, s1, s2, exp_result) < 0)

    return;

}

static void

do_test (size_t align1, size_t align2, size_t len1, size_t len2,

	 int fail)

{

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

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

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

#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';

  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);

      for (size_t i = 0; i < len2; ++i)

	s1[len1 - len2 + i] = toupper (s2[i]);

    }

  s1[len1] = '\0';

  FOR_EACH_IMPL (impl, 0)

    do_one_test (impl, s1, s2, fail ? NULL : s1 + len1 - len2);

}

static void

check1 (void)

{

  const char s1[] = "AOKB";

  const char s2[] = "OK";

  char *exp_result;

  exp_result = stupid_strcasestr (s1, s2);

  FOR_EACH_IMPL (impl, 0)

    check_result (impl, s1, s2, exp_result);

}

static int

test_main (void)

{

  test_init ();

  check1 ();

  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>