/* Test STRCHR functions.

   Copyright (C) 1999-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Written by Jakub Jelinek <jakub@redhat.com>, 1999.

   Added wcschr support by Liubov Dmitrieva <liubov.dmitrieva@gmail.com>, 2011

   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

# ifdef USE_FOR_STRCHRNUL

#  define TEST_NAME "strchrnul"

# else

#  define TEST_NAME "strchr"

# endif /* !USE_FOR_STRCHRNUL */

#else

# ifdef USE_FOR_STRCHRNUL

#  define TEST_NAME "wcschrnul"

# else

#  define TEST_NAME "wcschr"

# endif /* !USE_FOR_STRCHRNUL */

#endif /* WIDE */

#include "test-string.h"

#ifndef WIDE

# ifdef USE_FOR_STRCHRNUL

#  define STRCHR strchrnul

#  define stupid_STRCHR stupid_STRCHRNUL

#  define simple_STRCHR simple_STRCHRNUL

# else

#  define STRCHR strchr

# endif /* !USE_FOR_STRCHRNUL */

# define STRLEN strlen

# define CHAR char

# define BIG_CHAR CHAR_MAX

# define MIDDLE_CHAR 127

# define SMALL_CHAR 23

# define UCHAR unsigned char

# define L(s) s

#else

# include <wchar.h>

# ifdef USE_FOR_STRCHRNUL

#  define STRCHR wcschrnul

#  define stupid_STRCHR stupid_WCSCHRNUL

#  define simple_STRCHR simple_WCSCHRNUL

# else

#  define STRCHR wcschr

# endif /* !USE_FOR_STRCHRNUL */

# define STRLEN wcslen

# define CHAR wchar_t

# define BIG_CHAR WCHAR_MAX

# define MIDDLE_CHAR 1121

# define SMALL_CHAR 851

# define UCHAR wchar_t

# define L(s) L ## s

#endif /* WIDE */

#ifdef USE_FOR_STRCHRNUL

# define NULLRET(endptr) endptr

#else

# define NULLRET(endptr) NULL

#endif /* !USE_FOR_STRCHRNUL */

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

CHAR *

simple_STRCHR (const CHAR *s, int c)

{

  for (; *s != (CHAR) c; ++s)

    if (*s == '\0')

      return NULLRET ((CHAR *) s);

  return (CHAR *) s;

}

CHAR *

stupid_STRCHR (const CHAR *s, int c)

{

  size_t n = STRLEN (s) + 1;

  while (n--)

    if (*s++ == (CHAR) c)

      return (CHAR *) s - 1;

  return NULLRET ((CHAR *) s - 1);

}

IMPL (stupid_STRCHR, 0)

IMPL (simple_STRCHR, 0)

IMPL (STRCHR, 1)

static int

check_result (impl_t *impl, const CHAR *s, int c, const CHAR *exp_res)

{

  CHAR *res = CALL (impl, s, c);

  if (res != exp_res)

    {

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

	     c, res, exp_res);

      ret = 1;

      return -1;

    }

  return 0;

}

static void

do_one_test (impl_t *impl, const CHAR *s, int c, const CHAR *exp_res)

{

  if (check_result (impl, s, c, exp_res) < 0)

    return;

}

static void

do_test (size_t align, size_t pos, size_t len, int seek_char, int max_char)

/* For wcschr: align here means align 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.  */

{

  size_t i;

  CHAR *result;

  CHAR *buf = (CHAR *) buf1;

  align &= 15;

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

    return;

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

    {

      buf[align + i] = 32 + 23 * i % max_char;

      if (buf[align + i] == seek_char)

	buf[align + i] = seek_char + 1;

      else if (buf[align + i] == 0)

	buf[align + i] = 1;

    }

  buf[align + len] = 0;

  if (pos < len)

    {

      buf[align + pos] = seek_char;

      result = buf + align + pos;

    }

  else if (seek_char == 0)

    result = buf + align + len;

  else

    result = NULLRET (buf + align + len);

  FOR_EACH_IMPL (impl, 0)

    do_one_test (impl, buf + align, seek_char, result);

}

static void

do_random_tests (void)

{

  size_t i, j, n, align, pos, len;

  int seek_char;

  CHAR *result;

  UCHAR *p = (UCHAR *) (buf1 + page_size - 512 * sizeof (CHAR));

  for (n = 0; n < ITERATIONS; n++)

    {

      /* For wcschr: align here means align not in bytes, but in wchar_ts,

	 in bytes it will equal to align * (sizeof (wchar_t)).  */

      align = random () & 15;

      pos = random () & 511;

      seek_char = random () & 255;

      if (pos + align >= 511)

	pos = 510 - align - (random () & 7);

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

	 symbols.  */

      len = random () & 511;

      if ((pos == len && seek_char)

	  || (pos > len && (random () & 1)))

	len = pos + 1 + (random () & 7);

      if (len + align >= 512)

	len = 511 - align - (random () & 7);

      if (pos == len && seek_char)

	len = pos + 1;

      j = (pos > len ? pos : len) + align + 64;

      if (j > 512)

	j = 512;

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

	{

	  if (i == pos + align)

	    p[i] = seek_char;

	  else if (i == len + align)

	    p[i] = 0;

	  else

	    {

	      p[i] = random () & 255;

	      if (i < pos + align && p[i] == seek_char)

		p[i] = seek_char + 13;

	      if (i < len + align && !p[i])

		{

		  p[i] = seek_char - 13;

		  if (!p[i])

		    p[i] = 140;

		}

	    }

	}

      if (pos <= len)

	result = (CHAR *) (p + pos + align);

      else if (seek_char == 0)

	result = (CHAR *) (p + len + align);

      else

	result = NULLRET ((CHAR *) (p + len + align));

      FOR_EACH_IMPL (impl, 1)

	if (CALL (impl, (CHAR *) (p + align), seek_char) != result)

	  {

	    error (0, 0, "Iteration %zd - wrong result in function \

		   %s (align in bytes: %zd, seek_char: %d, len: %zd, pos: %zd) %p != %p, p %p",

		   n, impl->name, align * sizeof (CHAR), seek_char, len, pos,

		   CALL (impl, (CHAR *) (p + align), seek_char), result, p);

	    ret = 1;

	  }

    }

}

static void

check1 (void)

{

  CHAR s[] __attribute__((aligned(16))) = L ("\xff");

  CHAR c = L ('\xfe');

  CHAR *exp_result = stupid_STRCHR (s, c);

  FOR_EACH_IMPL (impl, 0)

    check_result (impl, s, c, exp_result);

}

int

test_main (void)

{

  size_t i;

  test_init ();

  check1 ();

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

  FOR_EACH_IMPL (impl, 0)

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

  putchar ('\n');

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

    {

      do_test (0, 16 << i, 2048, SMALL_CHAR, MIDDLE_CHAR);

      do_test (i, 16 << i, 2048, SMALL_CHAR, MIDDLE_CHAR);

    }

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

    {

      do_test (i, 64, 256, SMALL_CHAR, MIDDLE_CHAR);

      do_test (i, 64, 256, SMALL_CHAR, BIG_CHAR);

    }

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

    {

      do_test (0, i, i + 1, SMALL_CHAR, MIDDLE_CHAR);

      do_test (0, i, i + 1, SMALL_CHAR, BIG_CHAR);

    }

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

    {

      do_test (0, 16 << i, 2048, 0, MIDDLE_CHAR);

      do_test (i, 16 << i, 2048, 0, MIDDLE_CHAR);

    }

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

    {

      do_test (i, 64, 256, 0, MIDDLE_CHAR);

      do_test (i, 64, 256, 0, BIG_CHAR);

    }

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

    {

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

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

    }

  do_random_tests ();

  return ret;

}

#include <support/test-driver.c>