google3/third_party/grte/v4_src/glibc-2.19/string/test-memcmp.c - GRTEv4 - Git at Google

 /* Test and measure memcmp functions.
    Copyright (C) 1999-2014 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Written by Jakub Jelinek <jakub@redhat.com>, 1999.
    Added wmemcmp 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
 #ifdef WIDE
 # define TEST_NAME "wmemcmp"
 #else
 # define TEST_NAME "memcmp"
 #endif
 #include "test-string.h"
 #ifdef WIDE
 # include <inttypes.h>
 # include <wchar.h>

 # define MEMCMP wmemcmp
 # define MEMCPY wmemcpy
 # define SIMPLE_MEMCMP simple_wmemcmp
 # define CHAR wchar_t
 # define UCHAR wchar_t
 # define CHARBYTES 4
 # define CHAR__MIN WCHAR_MIN
 # define CHAR__MAX WCHAR_MAX
 int
 simple_wmemcmp (const wchar_t *s1, const wchar_t *s2, size_t n)
 {
   int ret = 0;
   /* Warning!
 	wmemcmp has to use SIGNED comparison for elements.
 	memcmp has to use UNSIGNED comparison for elemnts.
   */
   while (n-- && (ret = *s1 < *s2 ? -1 : *s1 == *s2 ? 0 : 1) == 0) {s1++; s2++;}
   return ret;
 }
 #else
 # include <limits.h>

 # define MEMCMP memcmp
 # define MEMCPY memcpy
 # define SIMPLE_MEMCMP simple_memcmp
 # define CHAR char
 # define MAX_CHAR 255
 # define UCHAR unsigned char
 # define CHARBYTES 1
 # define CHAR__MIN CHAR_MIN
 # define CHAR__MAX CHAR_MAX

 int
 simple_memcmp (const char *s1, const char *s2, size_t n)
 {
   int ret = 0;

   while (n-- && (ret = *(unsigned char *) s1++ - *(unsigned char *) s2++) == 0);
   return ret;
 }
 #endif

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

 IMPL (SIMPLE_MEMCMP, 0)
 IMPL (MEMCMP, 1)

 static int
 check_result (impl_t *impl, const CHAR *s1, const CHAR *s2, size_t len,
 	      int exp_result)
 {
   int result = CALL (impl, s1, s2, len);
   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 len,
 	     int exp_result)
 {
   if (check_result (impl, s1, s2, len, exp_result) < 0)
     return;
 }

 static void
 do_test (size_t align1, size_t align2, size_t len, int exp_result)
 {
   size_t i;
   CHAR *s1, *s2;

   if (len == 0)
     return;

   align1 &= 63;
   if (align1 + (len + 1) * CHARBYTES >= page_size)
     return;

   align2 &= 63;
   if (align2 + (len + 1) * CHARBYTES >= page_size)
     return;

   s1 = (CHAR *) (buf1 + align1);
   s2 = (CHAR *) (buf2 + align2);

   for (i = 0; i < len; i++)
     s1[i] = s2[i] = 1 + (23 << ((CHARBYTES - 1) * 8)) * i % CHAR__MAX;

   s1[len] = align1;
   s2[len] = align2;
   s2[len - 1] -= exp_result;

   FOR_EACH_IMPL (impl, 0)
     do_one_test (impl, s1, s2, len, exp_result);
 }

 static void
 do_random_tests (void)
 {
   size_t i, j, n, align1, align2, pos, len;
   int result;
   long r;
   UCHAR *p1 =  (UCHAR *) (buf1 + page_size - 512 * CHARBYTES);
   UCHAR *p2 =  (UCHAR *) (buf2 + page_size - 512 * CHARBYTES);

   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;
       if (align2 > j)
 	j = align2;
       if (pos + j >= 512)
 	pos = 511 - j - (random () & 7);
       len = random () & 511;
       if (len + j >= 512)
 	len = 511 - j - (random () & 7);
       j = len + align1 + 64;
       if (j > 512) j = 512;
       for (i = 0; i < j; ++i)
 	p1[i] = random () & 255;
       for (i = 0; i < j; ++i)
 	p2[i] = random () & 255;

       result = 0;
       if (pos >= len)
 	MEMCPY ((CHAR *) p2 + align2, (const CHAR *) p1 + align1, len);
       else
 	{
 	  MEMCPY ((CHAR *) p2 + align2, (const CHAR *) p1 + align1, pos);
 	  if (p2[align2 + pos] == p1[align1 + pos])
 	    {
 	      p2[align2 + pos] = random () & 255;
 	      if (p2[align2 + pos] == p1[align1 + pos])
 		p2[align2 + pos] = p1[align1 + pos] + 3 + (random () & 127);
 	    }

 	  if (p1[align1 + pos] < p2[align2 + pos])
 	    result = -1;
 	  else
 	    result = 1;
 	}

       FOR_EACH_IMPL (impl, 1)
 	{
 	  r = CALL (impl, (CHAR *) p1 + align1, (const CHAR *) p2 + align2,
 		    len);
 	  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) %ld != %d, p1 %p p2 %p",
 		     n, impl->name, align1 * CHARBYTES & 63,  align2 * CHARBYTES & 63, len, pos, r, result, p1, p2);
 	      ret = 1;
 	    }
 	}
     }
 }

 static void
 check1 (void)
 {
   CHAR s1[116], s2[116];
   int n, exp_result;

   s1[0] = -108;
   s2[0] = -108;
   s1[1] = 99;
   s2[1] = 99;
   s1[2] = -113;
   s2[2] = -113;
   s1[3] = 1;
   s2[3] = 1;
   s1[4] = 116;
   s2[4] = 116;
   s1[5] = 99;
   s2[5] = 99;
   s1[6] = -113;
   s2[6] = -113;
   s1[7] = 1;
   s2[7] = 1;
   s1[8] = 84;
   s2[8] = 84;
   s1[9] = 99;
   s2[9] = 99;
   s1[10] = -113;
   s2[10] = -113;
   s1[11] = 1;
   s2[11] = 1;
   s1[12] = 52;
   s2[12] = 52;
   s1[13] = 99;
   s2[13] = 99;
   s1[14] = -113;
   s2[14] = -113;
   s1[15] = 1;
   s2[15] = 1;
   s1[16] = -76;
   s2[16] = -76;
   s1[17] = -14;
   s2[17] = -14;
   s1[18] = -109;
   s2[18] = -109;
   s1[19] = 1;
   s2[19] = 1;
   s1[20] = -108;
   s2[20] = -108;
   s1[21] = -14;
   s2[21] = -14;
   s1[22] = -109;
   s2[22] = -109;
   s1[23] = 1;
   s2[23] = 1;
   s1[24] = 84;
   s2[24] = 84;
   s1[25] = -15;
   s2[25] = -15;
   s1[26] = -109;
   s2[26] = -109;
   s1[27] = 1;
   s2[27] = 1;
   s1[28] = 52;
   s2[28] = 52;
   s1[29] = -15;
   s2[29] = -15;
   s1[30] = -109;
   s2[30] = -109;
   s1[31] = 1;
   s2[31] = 1;
   s1[32] = 20;
   s2[32] = 20;
   s1[33] = -15;
   s2[33] = -15;
   s1[34] = -109;
   s2[34] = -109;
   s1[35] = 1;
   s2[35] = 1;
   s1[36] = 20;
   s2[36] = 20;
   s1[37] = -14;
   s2[37] = -14;
   s1[38] = -109;
   s2[38] = -109;
   s1[39] = 1;
   s2[39] = 1;
   s1[40] = 52;
   s2[40] = 52;
   s1[41] = -14;
   s2[41] = -14;
   s1[42] = -109;
   s2[42] = -109;
   s1[43] = 1;
   s2[43] = 1;
   s1[44] = 84;
   s2[44] = 84;
   s1[45] = -14;
   s2[45] = -14;
   s1[46] = -109;
   s2[46] = -109;
   s1[47] = 1;
   s2[47] = 1;
   s1[48] = 116;
   s2[48] = 116;
   s1[49] = -14;
   s2[49] = -14;
   s1[50] = -109;
   s2[50] = -109;
   s1[51] = 1;
   s2[51] = 1;
   s1[52] = 116;
   s2[52] = 116;
   s1[53] = -15;
   s2[53] = -15;
   s1[54] = -109;
   s2[54] = -109;
   s1[55] = 1;
   s2[55] = 1;
   s1[56] = -44;
   s2[56] = -44;
   s1[57] = -14;
   s2[57] = -14;
   s1[58] = -109;
   s2[58] = -109;
   s1[59] = 1;
   s2[59] = 1;
   s1[60] = -108;
   s2[60] = -108;
   s1[61] = -15;
   s2[61] = -15;
   s1[62] = -109;
   s2[62] = -109;
   s1[63] = 1;
   s2[63] = 1;
   s1[64] = -76;
   s2[64] = -76;
   s1[65] = -15;
   s2[65] = -15;
   s1[66] = -109;
   s2[66] = -109;
   s1[67] = 1;
   s2[67] = 1;
   s1[68] = -44;
   s2[68] = -44;
   s1[69] = -15;
   s2[69] = -15;
   s1[70] = -109;
   s2[70] = -109;
   s1[71] = 1;
   s2[71] = 1;
   s1[72] = -12;
   s2[72] = -12;
   s1[73] = -15;
   s2[73] = -15;
   s1[74] = -109;
   s2[74] = -109;
   s1[75] = 1;
   s2[75] = 1;
   s1[76] = -12;
   s2[76] = -12;
   s1[77] = -14;
   s2[77] = -14;
   s1[78] = -109;
   s2[78] = -109;
   s1[79] = 1;
   s2[79] = 1;
   s1[80] = 20;
   s2[80] = -68;
   s1[81] = -12;
   s2[81] = 64;
   s1[82] = -109;
   s2[82] = -106;
   s1[83] = 1;
   s2[83] = 1;
   s1[84] = -12;
   s2[84] = -12;
   s1[85] = -13;
   s2[85] = -13;
   s1[86] = -109;
   s2[86] = -109;
   s1[87] = 1;
   s2[87] = 1;
   s1[88] = -44;
   s2[88] = -44;
   s1[89] = -13;
   s2[89] = -13;
   s1[90] = -109;
   s2[90] = -109;
   s1[91] = 1;
   s2[91] = 1;
   s1[92] = -76;
   s2[92] = -76;
   s1[93] = -13;
   s2[93] = -13;
   s1[94] = -109;
   s2[94] = -109;
   s1[95] = 1;
   s2[95] = 1;
   s1[96] = -108;
   s2[96] = -108;
   s1[97] = -13;
   s2[97] = -13;
   s1[98] = -109;
   s2[98] = -109;
   s1[99] = 1;
   s2[99] = 1;
   s1[100] = 116;
   s2[100] = 116;
   s1[101] = CHAR__MIN;
   s2[101] = CHAR__MAX;
   s1[102] = -109;
   s2[102] = -109;
   s1[103] = 1;
   s2[103] = 1;
   s1[104] = 84;
   s2[104] = 84;
   s1[105] = -13;
   s2[105] = -13;
   s1[106] = -109;
   s2[106] = -109;
   s1[107] = 1;
   s2[107] = 1;
   s1[108] = 52;
   s2[108] = 52;
   s1[109] = -13;
   s2[109] = -13;
   s1[110] = -109;
   s2[110] = -109;
   s1[111] = 1;
   s2[111] = 1;
   s1[112] = CHAR__MAX;
   s2[112] = CHAR__MIN;
   s1[113] = -13;
   s2[113] = -13;
   s1[114] = -109;
   s2[114] = -109;
   s1[115] = 1;
   s2[115] = 1;

   n = 116;
   for (size_t i = 0; i < n; i++)
     {
       exp_result = SIMPLE_MEMCMP (s1 + i, s2 + i, n - i);
       FOR_EACH_IMPL (impl, 0)
 	check_result (impl, s1 + i, s2 + i, n - i, exp_result);
     }
 }

 /* This test checks that memcmp doesn't overrun buffers.  */
 static void
 check2 (void)
 {
   size_t max_length = page_size / sizeof (CHAR);

   /* Initialize buf2 to the same values as buf1.  The bug requires the
      last compared byte to be different.  */
   memcpy (buf2, buf1, page_size);
   ((char *) buf2)[page_size - 1] ^= 0x11;

   for (size_t length = 1; length < max_length; length++)
     {
       CHAR *s1 = (CHAR *) buf1 + max_length - length;
       CHAR *s2 = (CHAR *) buf2 + max_length - length;

       const int exp_result = SIMPLE_MEMCMP (s1, s2, length);

       FOR_EACH_IMPL (impl, 0)
 	check_result (impl, s1, s2, length, exp_result);
     }
 }

 int
 test_main (void)
 {
   size_t i;

   test_init ();

   check1 ();
   check2 ();

   printf ("%23s", "");
   FOR_EACH_IMPL (impl, 0)
     printf ("\t%s", impl->name);
   putchar ('\n');

   for (i = 1; i < 16; ++i)
     {
       do_test (i * CHARBYTES, i * CHARBYTES, i, 0);
       do_test (i * CHARBYTES, i * CHARBYTES, i, 1);
       do_test (i * CHARBYTES, i * CHARBYTES, i, -1);
     }

   for (i = 0; i < 16; ++i)
     {
       do_test (0, 0, i, 0);
       do_test (0, 0, i, 1);
       do_test (0, 0, i, -1);
     }

   for (i = 1; i < 10; ++i)
     {
       do_test (0, 0, 2 << i, 0);
       do_test (0, 0, 2 << i, 1);
       do_test (0, 0, 2 << i, -1);
       do_test (0, 0, 16 << i, 0);
       do_test ((8 - i) * CHARBYTES, (2 * i) * CHARBYTES, 16 << i, 0);
       do_test (0, 0, 16 << i, 1);
       do_test (0, 0, 16 << i, -1);
     }

   for (i = 1; i < 8; ++i)
     {
       do_test (i * CHARBYTES, 2 * (i * CHARBYTES), 8 << i, 0);
       do_test (i * CHARBYTES, 2 * (i * CHARBYTES), 8 << i, 1);
       do_test (i * CHARBYTES, 2 * (i * CHARBYTES), 8 << i, -1);
     }

   do_random_tests ();
   return ret;
 }
 #include "../test-skeleton.c"
	/* Test and measure memcmp functions.
	Copyright (C) 1999-2014 Free Software Foundation, Inc.
	This file is part of the GNU C Library.
	Written by Jakub Jelinek <jakub@redhat.com>, 1999.
	Added wmemcmp 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
	#ifdef WIDE
	# define TEST_NAME "wmemcmp"
	#else
	# define TEST_NAME "memcmp"
	#endif
	#include "test-string.h"
	#ifdef WIDE
	# include <inttypes.h>
	# include <wchar.h>

	# define MEMCMP wmemcmp
	# define MEMCPY wmemcpy
	# define SIMPLE_MEMCMP simple_wmemcmp
	# define CHAR wchar_t
	# define UCHAR wchar_t
	# define CHARBYTES 4
	# define CHAR__MIN WCHAR_MIN
	# define CHAR__MAX WCHAR_MAX
	int
	simple_wmemcmp (const wchar_t s1, const wchar_t s2, size_t n)
	{
	int ret = 0;
	/* Warning!
	wmemcmp has to use SIGNED comparison for elements.
	memcmp has to use UNSIGNED comparison for elemnts.
	*/
	while (n-- && (ret = s1 < s2 ? -1 : s1 == s2 ? 0 : 1) == 0) {s1++; s2++;}
	return ret;
	}
	#else
	# include <limits.h>

	# define MEMCMP memcmp
	# define MEMCPY memcpy
	# define SIMPLE_MEMCMP simple_memcmp
	# define CHAR char
	# define MAX_CHAR 255
	# define UCHAR unsigned char
	# define CHARBYTES 1
	# define CHAR__MIN CHAR_MIN
	# define CHAR__MAX CHAR_MAX

	int
	simple_memcmp (const char s1, const char s2, size_t n)
	{
	int ret = 0;

	while (n-- && (ret = (unsigned char ) s1++ - (unsigned char ) s2++) == 0);
	return ret;
	}
	#endif

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

	IMPL (SIMPLE_MEMCMP, 0)
	IMPL (MEMCMP, 1)

	static int
	check_result (impl_t impl, const CHAR s1, const CHAR *s2, size_t len,
	int exp_result)
	{
	int result = CALL (impl, s1, s2, len);
	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 len,
	int exp_result)
	{
	if (check_result (impl, s1, s2, len, exp_result) < 0)
	return;
	}

	static void
	do_test (size_t align1, size_t align2, size_t len, int exp_result)
	{
	size_t i;
	CHAR s1, s2;

	if (len == 0)
	return;

	align1 &= 63;
	if (align1 + (len + 1) * CHARBYTES >= page_size)
	return;

	align2 &= 63;
	if (align2 + (len + 1) * CHARBYTES >= page_size)
	return;

	s1 = (CHAR *) (buf1 + align1);
	s2 = (CHAR *) (buf2 + align2);

	for (i = 0; i < len; i++)
	s1[i] = s2[i] = 1 + (23 << ((CHARBYTES - 1) * 8)) * i % CHAR__MAX;

	s1[len] = align1;
	s2[len] = align2;
	s2[len - 1] -= exp_result;

	FOR_EACH_IMPL (impl, 0)
	do_one_test (impl, s1, s2, len, exp_result);
	}

	static void
	do_random_tests (void)
	{
	size_t i, j, n, align1, align2, pos, len;
	int result;
	long r;
	UCHAR p1 = (UCHAR ) (buf1 + page_size - 512 * CHARBYTES);
	UCHAR p2 = (UCHAR ) (buf2 + page_size - 512 * CHARBYTES);

	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;
	if (align2 > j)
	j = align2;
	if (pos + j >= 512)
	pos = 511 - j - (random () & 7);
	len = random () & 511;
	if (len + j >= 512)
	len = 511 - j - (random () & 7);
	j = len + align1 + 64;
	if (j > 512) j = 512;
	for (i = 0; i < j; ++i)
	p1[i] = random () & 255;
	for (i = 0; i < j; ++i)
	p2[i] = random () & 255;

	result = 0;
	if (pos >= len)
	MEMCPY ((CHAR ) p2 + align2, (const CHAR ) p1 + align1, len);
	else
	{
	MEMCPY ((CHAR ) p2 + align2, (const CHAR ) p1 + align1, pos);
	if (p2[align2 + pos] == p1[align1 + pos])
	{
	p2[align2 + pos] = random () & 255;
	if (p2[align2 + pos] == p1[align1 + pos])
	p2[align2 + pos] = p1[align1 + pos] + 3 + (random () & 127);
	}

	if (p1[align1 + pos] < p2[align2 + pos])
	result = -1;
	else
	result = 1;
	}

	FOR_EACH_IMPL (impl, 1)
	{
	r = CALL (impl, (CHAR ) p1 + align1, (const CHAR ) p2 + align2,
	len);
	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) %ld != %d, p1 %p p2 %p",
	n, impl->name, align1 * CHARBYTES & 63, align2 * CHARBYTES & 63, len, pos, r, result, p1, p2);
	ret = 1;
	}
	}
	}
	}

	static void
	check1 (void)
	{
	CHAR s1[116], s2[116];
	int n, exp_result;

	s1[0] = -108;
	s2[0] = -108;
	s1[1] = 99;
	s2[1] = 99;
	s1[2] = -113;
	s2[2] = -113;
	s1[3] = 1;
	s2[3] = 1;
	s1[4] = 116;
	s2[4] = 116;
	s1[5] = 99;
	s2[5] = 99;
	s1[6] = -113;
	s2[6] = -113;
	s1[7] = 1;
	s2[7] = 1;
	s1[8] = 84;
	s2[8] = 84;
	s1[9] = 99;
	s2[9] = 99;
	s1[10] = -113;
	s2[10] = -113;
	s1[11] = 1;
	s2[11] = 1;
	s1[12] = 52;
	s2[12] = 52;
	s1[13] = 99;
	s2[13] = 99;
	s1[14] = -113;
	s2[14] = -113;
	s1[15] = 1;
	s2[15] = 1;
	s1[16] = -76;
	s2[16] = -76;
	s1[17] = -14;
	s2[17] = -14;
	s1[18] = -109;
	s2[18] = -109;
	s1[19] = 1;
	s2[19] = 1;
	s1[20] = -108;
	s2[20] = -108;
	s1[21] = -14;
	s2[21] = -14;
	s1[22] = -109;
	s2[22] = -109;
	s1[23] = 1;
	s2[23] = 1;
	s1[24] = 84;
	s2[24] = 84;
	s1[25] = -15;
	s2[25] = -15;
	s1[26] = -109;
	s2[26] = -109;
	s1[27] = 1;
	s2[27] = 1;
	s1[28] = 52;
	s2[28] = 52;
	s1[29] = -15;
	s2[29] = -15;
	s1[30] = -109;
	s2[30] = -109;
	s1[31] = 1;
	s2[31] = 1;
	s1[32] = 20;
	s2[32] = 20;
	s1[33] = -15;
	s2[33] = -15;
	s1[34] = -109;
	s2[34] = -109;
	s1[35] = 1;
	s2[35] = 1;
	s1[36] = 20;
	s2[36] = 20;
	s1[37] = -14;
	s2[37] = -14;
	s1[38] = -109;
	s2[38] = -109;
	s1[39] = 1;
	s2[39] = 1;
	s1[40] = 52;
	s2[40] = 52;
	s1[41] = -14;
	s2[41] = -14;
	s1[42] = -109;
	s2[42] = -109;
	s1[43] = 1;
	s2[43] = 1;
	s1[44] = 84;
	s2[44] = 84;
	s1[45] = -14;
	s2[45] = -14;
	s1[46] = -109;
	s2[46] = -109;
	s1[47] = 1;
	s2[47] = 1;
	s1[48] = 116;
	s2[48] = 116;
	s1[49] = -14;
	s2[49] = -14;
	s1[50] = -109;
	s2[50] = -109;
	s1[51] = 1;
	s2[51] = 1;
	s1[52] = 116;
	s2[52] = 116;
	s1[53] = -15;
	s2[53] = -15;
	s1[54] = -109;
	s2[54] = -109;
	s1[55] = 1;
	s2[55] = 1;
	s1[56] = -44;
	s2[56] = -44;
	s1[57] = -14;
	s2[57] = -14;
	s1[58] = -109;
	s2[58] = -109;
	s1[59] = 1;
	s2[59] = 1;
	s1[60] = -108;
	s2[60] = -108;
	s1[61] = -15;
	s2[61] = -15;
	s1[62] = -109;
	s2[62] = -109;
	s1[63] = 1;
	s2[63] = 1;
	s1[64] = -76;
	s2[64] = -76;
	s1[65] = -15;
	s2[65] = -15;
	s1[66] = -109;
	s2[66] = -109;
	s1[67] = 1;
	s2[67] = 1;
	s1[68] = -44;
	s2[68] = -44;
	s1[69] = -15;
	s2[69] = -15;
	s1[70] = -109;
	s2[70] = -109;
	s1[71] = 1;
	s2[71] = 1;
	s1[72] = -12;
	s2[72] = -12;
	s1[73] = -15;
	s2[73] = -15;
	s1[74] = -109;
	s2[74] = -109;
	s1[75] = 1;
	s2[75] = 1;
	s1[76] = -12;
	s2[76] = -12;
	s1[77] = -14;
	s2[77] = -14;
	s1[78] = -109;
	s2[78] = -109;
	s1[79] = 1;
	s2[79] = 1;
	s1[80] = 20;
	s2[80] = -68;
	s1[81] = -12;
	s2[81] = 64;
	s1[82] = -109;
	s2[82] = -106;
	s1[83] = 1;
	s2[83] = 1;
	s1[84] = -12;
	s2[84] = -12;
	s1[85] = -13;
	s2[85] = -13;
	s1[86] = -109;
	s2[86] = -109;
	s1[87] = 1;
	s2[87] = 1;
	s1[88] = -44;
	s2[88] = -44;
	s1[89] = -13;
	s2[89] = -13;
	s1[90] = -109;
	s2[90] = -109;
	s1[91] = 1;
	s2[91] = 1;
	s1[92] = -76;
	s2[92] = -76;
	s1[93] = -13;
	s2[93] = -13;
	s1[94] = -109;
	s2[94] = -109;
	s1[95] = 1;
	s2[95] = 1;
	s1[96] = -108;
	s2[96] = -108;
	s1[97] = -13;
	s2[97] = -13;
	s1[98] = -109;
	s2[98] = -109;
	s1[99] = 1;
	s2[99] = 1;
	s1[100] = 116;
	s2[100] = 116;
	s1[101] = CHAR__MIN;
	s2[101] = CHAR__MAX;
	s1[102] = -109;
	s2[102] = -109;
	s1[103] = 1;
	s2[103] = 1;
	s1[104] = 84;
	s2[104] = 84;
	s1[105] = -13;
	s2[105] = -13;
	s1[106] = -109;
	s2[106] = -109;
	s1[107] = 1;
	s2[107] = 1;
	s1[108] = 52;
	s2[108] = 52;
	s1[109] = -13;
	s2[109] = -13;
	s1[110] = -109;
	s2[110] = -109;
	s1[111] = 1;
	s2[111] = 1;
	s1[112] = CHAR__MAX;
	s2[112] = CHAR__MIN;
	s1[113] = -13;
	s2[113] = -13;
	s1[114] = -109;
	s2[114] = -109;
	s1[115] = 1;
	s2[115] = 1;

	n = 116;
	for (size_t i = 0; i < n; i++)
	{
	exp_result = SIMPLE_MEMCMP (s1 + i, s2 + i, n - i);
	FOR_EACH_IMPL (impl, 0)
	check_result (impl, s1 + i, s2 + i, n - i, exp_result);
	}
	}

	/* This test checks that memcmp doesn't overrun buffers. */
	static void
	check2 (void)
	{
	size_t max_length = page_size / sizeof (CHAR);

	/* Initialize buf2 to the same values as buf1. The bug requires the
	last compared byte to be different. */
	memcpy (buf2, buf1, page_size);
	((char *) buf2)[page_size - 1] ^= 0x11;

	for (size_t length = 1; length < max_length; length++)
	{
	CHAR s1 = (CHAR ) buf1 + max_length - length;
	CHAR s2 = (CHAR ) buf2 + max_length - length;

	const int exp_result = SIMPLE_MEMCMP (s1, s2, length);

	FOR_EACH_IMPL (impl, 0)
	check_result (impl, s1, s2, length, exp_result);
	}
	}

	int
	test_main (void)
	{
	size_t i;

	test_init ();

	check1 ();
	check2 ();

	printf ("%23s", "");
	FOR_EACH_IMPL (impl, 0)
	printf ("\t%s", impl->name);
	putchar ('\n');

	for (i = 1; i < 16; ++i)
	{
	do_test (i * CHARBYTES, i * CHARBYTES, i, 0);
	do_test (i * CHARBYTES, i * CHARBYTES, i, 1);
	do_test (i * CHARBYTES, i * CHARBYTES, i, -1);
	}

	for (i = 0; i < 16; ++i)
	{
	do_test (0, 0, i, 0);
	do_test (0, 0, i, 1);
	do_test (0, 0, i, -1);
	}

	for (i = 1; i < 10; ++i)
	{
	do_test (0, 0, 2 << i, 0);
	do_test (0, 0, 2 << i, 1);
	do_test (0, 0, 2 << i, -1);
	do_test (0, 0, 16 << i, 0);
	do_test ((8 - i) * CHARBYTES, (2 * i) * CHARBYTES, 16 << i, 0);
	do_test (0, 0, 16 << i, 1);
	do_test (0, 0, 16 << i, -1);
	}

	for (i = 1; i < 8; ++i)
	{
	do_test (i * CHARBYTES, 2 * (i * CHARBYTES), 8 << i, 0);
	do_test (i * CHARBYTES, 2 * (i * CHARBYTES), 8 << i, 1);
	do_test (i * CHARBYTES, 2 * (i * CHARBYTES), 8 << i, -1);
	}

	do_random_tests ();
	return ret;
	}
	#include "../test-skeleton.c"