/* Test and measure strncasecmp 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.

   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 <locale.h>

#include <ctype.h>

#define TEST_MAIN

#define TEST_NAME "strncasecmp"

#include "test-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 int

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

	      int exp_result)

{

  int result = CALL (impl, s1, s2, n);

  if ((exp_result == 0 && result != 0)

      || (exp_result < 0 && result >= 0)

      || (exp_result > 0 && result <= 0))

    {

      error (0, 0, "Wrong result in function %s %d %d", 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, size_t n,

	     int exp_result)

{

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

    return;

}

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;

  FOR_EACH_IMPL (impl, 0)

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

}

static void

do_random_tests (void)

{

  size_t i, j, n, align1, align2, pos, len1, len2;

  int result;

  long r;

  unsigned char *p1 = buf1 + page_size - 512;

  unsigned char *p2 = buf2 + page_size - 512;

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

    {

      align1 = random () & 31;

      if (random () & 1)

	align2 = random () & 31;

      else

	align2 = align1 + (random () & 24);

      pos = random () & 511;

      j = align1 > align2 ? align1 : align2;

      if (pos + j >= 511)

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

      len1 = random () & 511;

      if (pos >= len1 && (random () & 1))

	len1 = pos + (random () & 7);

      if (len1 + j >= 512)

	len1 = 511 - j - (random () & 7);

      if (pos >= len1)

	len2 = len1;

      else

	len2 = len1 + (len1 != 511 - j ? random () % (511 - j - len1) : 0);

      j = (pos > len2 ? pos : len2) + align1 + 64;

      if (j > 512)

	j = 512;

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

	{

	  p1[i] = tolower (random () & 255);

	  if (i < len1 + align1 && !p1[i])

	    {

	      p1[i] = tolower (random () & 255);

	      if (!p1[i])

		p1[i] = tolower (1 + (random () & 127));

	    }

	}

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

	{

	  p2[i] = toupper (random () & 255);

	  if (i < len2 + align2 && !p2[i])

	    {

	      p2[i] = toupper (random () & 255);

	      if (!p2[i])

		toupper (p2[i] = 1 + (random () & 127));

	    }

	}

      result = 0;

      memcpy (p2 + align2, p1 + align1, pos);

      if (pos < len1)

	{

	  if (tolower (p2[align2 + pos]) == p1[align1 + pos])

	    {

	      p2[align2 + pos] = toupper (random () & 255);

	      if (tolower (p2[align2 + pos]) == p1[align1 + pos])

		p2[align2 + pos] = toupper (p1[align1 + pos]

					    + 3 + (random () & 127));

	    }

	  if (p1[align1 + pos] < tolower (p2[align2 + pos]))

	    result = -1;

	  else

	    result = 1;

	}

      p1[len1 + align1] = 0;

      p2[len2 + align2] = 0;

      FOR_EACH_IMPL (impl, 1)

	{

	  r = CALL (impl, (char *) (p1 + align1), (char *) (p2 + align2),

		    pos + 1 + (random () & 255));

	  /* Test whether on 64-bit architectures where ABI requires

	     callee to promote has the promotion been done.  */

	  asm ("" : "=g" (r) : "0" (r));

	  if ((r == 0 && result)

	      || (r < 0 && result >= 0)

	      || (r > 0 && result <= 0))

	    {

	      error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd, %zd, %zd) %ld != %d, p1 %p p2 %p",

		     n, impl->name, align1, align2, len1, len2, pos, r, result, p1, p2);

	      ret = 1;

	    }

	}

    }

}

/* Regression test for BZ #12205 */

static void

bz12205 (void)

{

  static char cp [4096+16] __attribute__ ((aligned(4096)));

  static char gotrel[4096] __attribute__ ((aligned(4096)));

  char *s1 = cp + 0xffa;

  char *s2 = gotrel + 0xcbe;

  int exp_result;

  size_t n = 6;

  strcpy (s1, "gottpoff");

  strcpy (s2, "GOTPLT");

  exp_result = simple_strncasecmp (s1, s2, n);

  FOR_EACH_IMPL (impl, 0)

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

}

/* Regression test for BZ #14195 */

static void

bz14195 (void)

{

  const char *empty_string  = "";

  FOR_EACH_IMPL (impl, 0)

    check_result (impl, empty_string, "", 5, 0);

}

static void

test_locale (const char *locale)

{

  size_t i;

  if (setlocale (LC_CTYPE, locale) == NULL)

    {

      error (0, 0, "cannot set locale \"%s\"", locale);

      ret = 1;

    }

  bz12205 ();

  bz14195 ();

  printf ("%23s", locale);

  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);

    }

  do_random_tests ();

}

int

test_main (void)

{

  test_init ();

  test_locale ("C");

  test_locale ("en_US.ISO-8859-1");

  test_locale ("en_US.UTF-8");

  test_locale ("tr_TR.ISO-8859-9");

  test_locale ("tr_TR.UTF-8");

  return ret;

}

#include <support/test-driver.c>