[thirdparty/glibc.git] / string / test-strncpy.c

/* Test and measure strncpy functions.
   Copyright (C) 1999, 2002, 2003 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, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#ifndef STRNCPY_RESULT
# define STRNCPY_RESULT(dst, len, n) dst
# define TEST_MAIN
# include "test-string.h"

char *simple_strncpy (char *, const char *, size_t);
char *stupid_strncpy (char *, const char *, size_t);

IMPL (stupid_strncpy, 0)
IMPL (simple_strncpy, 0)
IMPL (strncpy, 1)

char *
simple_strncpy (char *dst, const char *src, size_t n)
{
  char *ret = dst;
  while (n--)
    if ((*dst++ = *src++) == '\0')
      {
	while (n--)
	  *dst++ = '\0';
	return ret;
      }
  return ret;
}

char *
stupid_strncpy (char *dst, const char *src, size_t n)
{
  size_t nc = strnlen (src, n);
  size_t i;

  for (i = 0; i < nc; ++i)
    dst[i] = src[i];
  for (; i < n; ++i)
    dst[i] = '\0';
  return dst;
}
#endif

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

static void
do_one_test (impl_t *impl, char *dst, const char *src, size_t len, size_t n)
{
  if (CALL (impl, dst, src, n) != STRNCPY_RESULT (dst, len, n))
    {
      error (0, 0, "Wrong result in function %s %p %p", impl->name,
	     CALL (impl, dst, src, n), dst);
      ret = 1;
      return;
    }

  if (memcmp (dst, src, len > n ? n : len) != 0)
    {
      error (0, 0, "Wrong result in function %s", impl->name);
      ret = 1;
      return;
    }

  if (n > len)
    {
      size_t i;

      for (i = len; i < n; ++i)
	if (dst [i] != '\0')
	  {
	    error (0, 0, "Wrong result in function %s", impl->name);
	    ret = 1;
	    return;
	  }
    }

  if (HP_TIMING_AVAIL)
    {
      hp_timing_t start __attribute__ ((unused));
      hp_timing_t stop __attribute__ ((unused));
      hp_timing_t best_time = ~ (hp_timing_t) 0;
      size_t i;

      for (i = 0; i < 32; ++i)
	{
	  HP_TIMING_NOW (start);
	  CALL (impl, dst, src, n);
	  HP_TIMING_NOW (stop);
	  HP_TIMING_BEST (best_time, start, stop);
	}

      printf ("\t%zd", (size_t) best_time);
    }
}

static void
do_test (size_t align1, size_t align2, size_t len, size_t n, int max_char)
{
  size_t i;
  char *s1, *s2;

  align1 &= 7;
  if (align1 + len >= page_size)
    return;

  align2 &= 7;
  if (align2 + len >= page_size)
    return;

  s1 = buf1 + align1;
  s2 = buf2 + align2;

  for (i = 0; i < len; ++i)
    s1[i] = 32 + 23 * i % (max_char - 32);
  s1[len] = 0;
  for (i = len + 1; i + align1 < page_size && i < len + 64; ++i)
    s1[i] = 32 + 32 * i % (max_char - 32);

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

  FOR_EACH_IMPL (impl, 0)
    do_one_test (impl, s2, s1, len, n);

  if (HP_TIMING_AVAIL)
    putchar ('\n');
}

static void
do_random_tests (void)
{
  size_t i, j, n, align1, align2, len, size, mode;
  unsigned char *p1 = buf1 + page_size - 512;
  unsigned char *p2 = buf2 + page_size - 512;
  unsigned char *res;

  for (n = 0; n < ITERATIONS; n++)
    {
      mode = random ();
      if (mode & 1)
	{
	  size = random () & 255;
	  align1 = 512 - size - (random () & 15);
	  if (mode & 2)
	    align2 = align1 - (random () & 24);
	  else
	    align2 = align1 - (random () & 31);
	  if (mode & 4)
	    {
	      j = align1;
	      align1 = align2;
	      align2 = j;
	    }
	  if (mode & 8)
	    len = size - (random () & 31);
	  else
	    len = 512;
	  if (len >= 512)
	    len = random () & 511;
	}
      else
	{
	  align1 = random () & 31;
	  if (mode & 2)
	    align2 = random () & 31;
	  else
	    align2 = align1 + (random () & 24);
	  len = random () & 511;
	  j = align1;
	  if (align2 > j)
	    j = align2;
	  if (mode & 4)
	    {
	      size = random () & 511;
	      if (size + j > 512)
		size = 512 - j - (random() & 31);
	    }
	  else
	    size = 512 - j;
	  if ((mode & 8) && len + j >= 512)
	    len = 512 - j - (random () & 7);
	}
      j = len + align1 + 64;
      if (j > 512)
	j = 512;
      for (i = 0; i < j; i++)
	{
	  if (i == len + align1)
	    p1[i] = 0;
	  else
	    {
	      p1[i] = random () & 255;
	      if (i >= align1 && i < len + align1 && !p1[i])
		p1[i] = (random () & 127) + 3;
	    }
	}

      FOR_EACH_IMPL (impl, 1)
	{
	  memset (p2 - 64, '\1', 512 + 64);
	  res = CALL (impl, p2 + align2, p1 + align1, size);
	  if (res != STRNCPY_RESULT (p2 + align2, len, size))
	    {
	      error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p",
		     n, impl->name, align1, align2, len, res,
		     STRNCPY_RESULT (p2 + align2, len, size));
	      ret = 1;
	    }
	  for (j = 0; j < align2 + 64; ++j)
	    {
	      if (p2[j - 64] != '\1')
		{
		  error (0, 0, "Iteration %zd - garbage before, %s (%zd, %zd, %zd)",
			 n, impl->name, align1, align2, len);
		  ret = 1;
		  break;
		}
	    }
	  j = align2 + len + 1;
	  if (size + align2 > j)
	    j = size + align2;
	  for (; j < 512; ++j)
	    {
	      if (p2[j] != '\1')
		{
		  error (0, 0, "Iteration %zd - garbage after, %s (%zd, %zd, %zd)",
			 n, impl->name, align1, align2, len);
		  ret = 1;
		  break;
		}
	    }
	  for (j = align2 + len + 1; j < align2 + size; ++j)
	    if (p2[j])
	      {
		error (0, 0, "Iteration %zd - garbage after size, %s (%zd, %zd, %zd)",
		       n, impl->name, align1, align2, len);
		ret = 1;
		break;
	      }
	  j = len + 1;
	  if (size < j)
	    j = size;
	  if (memcmp (p1 + align1, p2 + align2, j))
	    {
	      error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd)",
		     n, impl->name, align1, align2, len);
	      ret = 1;
	    }
	}
    }
}

int
test_main (void)
{
  size_t i;

  test_init ();

  printf ("%28s", "");
  FOR_EACH_IMPL (impl, 0)
    printf ("\t%s", impl->name);
  putchar ('\n');

  for (i = 1; i < 8; ++i)
    {
      do_test (i, i, 16, 16, 127);
      do_test (i, i, 16, 16, 255);
      do_test (i, 2 * i, 16, 16, 127);
      do_test (2 * i, i, 16, 16, 255);
      do_test (8 - i, 2 * i, 1 << i, 2 << i, 127);
      do_test (2 * i, 8 - i, 2 << i, 1 << i, 127);
      do_test (8 - i, 2 * i, 1 << i, 2 << i, 255);
      do_test (2 * i, 8 - i, 2 << i, 1 << i, 255);
    }

  for (i = 1; i < 8; ++i)
    {
      do_test (0, 0, 4 << i, 8 << i, 127);
      do_test (0, 0, 16 << i, 8 << i, 127);
      do_test (8 - i, 2 * i, 4 << i, 8 << i, 127);
      do_test (8 - i, 2 * i, 16 << i, 8 << i, 127);
    }

  do_random_tests ();
  return ret;
}

#include "../test-skeleton.c"
Commit	Line	Data
58ef9ef7	1	/* Test and measure strncpy functions.
a334319f	2	Copyright (C) 1999, 2002, 2003 Free Software Foundation, Inc.
58ef9ef7 RM	3	This file is part of the GNU C Library.
	4	Written by Jakub Jelinek <jakub@redhat.com>, 1999.
	5
	6	The GNU C Library is free software; you can redistribute it and/or
	7	modify it under the terms of the GNU Lesser General Public
	8	License as published by the Free Software Foundation; either
	9	version 2.1 of the License, or (at your option) any later version.
	10
	11	The GNU C Library is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	14	Lesser General Public License for more details.
	15
	16	You should have received a copy of the GNU Lesser General Public
	17	License along with the GNU C Library; if not, write to the Free
	18	Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
	19	02111-1307 USA. */
	20
	21	#ifndef STRNCPY_RESULT
	22	# define STRNCPY_RESULT(dst, len, n) dst
	23	# define TEST_MAIN
	24	# include "test-string.h"
	25
	26	char simple_strncpy (char , const char *, size_t);
e8c1660f	27	char stupid_strncpy (char , const char *, size_t);
58ef9ef7	28
e8c1660f	29	IMPL (stupid_strncpy, 0)
58ef9ef7 RM	30	IMPL (simple_strncpy, 0)
	31	IMPL (strncpy, 1)
	32
	33	char *
	34	simple_strncpy (char dst, const char src, size_t n)
	35	{
	36	char *ret = dst;
	37	while (n--)
	38	if ((dst++ = src++) == '\0')
	39	{
	40	while (n--)
	41	*dst++ = '\0';
	42	return ret;
	43	}
	44	return ret;
	45	}
e8c1660f RM	46
	47	char *
	48	stupid_strncpy (char dst, const char src, size_t n)
	49	{
9372c958 RM	50	size_t nc = strnlen (src, n);
9372c958 RM	51	size_t i;
e8c1660f RM	52
	53	for (i = 0; i < nc; ++i)
	54	dst[i] = src[i];
	55	for (; i < n; ++i)
	56	dst[i] = '\0';
	57	return dst;
	58	}
58ef9ef7 RM	59	#endif
	60
	61	typedef char (proto_t) (char , const char , size_t);
	62
	63	static void
	64	do_one_test (impl_t impl, char dst, const char *src, size_t len, size_t n)
	65	{
	66	if (CALL (impl, dst, src, n) != STRNCPY_RESULT (dst, len, n))
	67	{
	68	error (0, 0, "Wrong result in function %s %p %p", impl->name,
	69	CALL (impl, dst, src, n), dst);
	70	ret = 1;
	71	return;
	72	}
	73
	74	if (memcmp (dst, src, len > n ? n : len) != 0)
	75	{
	76	error (0, 0, "Wrong result in function %s", impl->name);
	77	ret = 1;
	78	return;
	79	}
	80
	81	if (n > len)
	82	{
	83	size_t i;
	84
	85	for (i = len; i < n; ++i)
	86	if (dst [i] != '\0')
	87	{
	88	error (0, 0, "Wrong result in function %s", impl->name);
	89	ret = 1;
	90	return;
	91	}
	92	}
	93
	94	if (HP_TIMING_AVAIL)
	95	{
0aa72cf1 UD	96	hp_timing_t start __attribute__ ((unused));
	97	hp_timing_t stop __attribute__ ((unused));
	98	hp_timing_t best_time = ~ (hp_timing_t) 0;
58ef9ef7 RM	99	size_t i;
	100
	101	for (i = 0; i < 32; ++i)
	102	{
	103	HP_TIMING_NOW (start);
	104	CALL (impl, dst, src, n);
	105	HP_TIMING_NOW (stop);
	106	HP_TIMING_BEST (best_time, start, stop);
	107	}
	108
	109	printf ("\t%zd", (size_t) best_time);
	110	}
	111	}
	112
	113	static void
	114	do_test (size_t align1, size_t align2, size_t len, size_t n, int max_char)
	115	{
	116	size_t i;
	117	char s1, s2;
	118
	119	align1 &= 7;
	120	if (align1 + len >= page_size)
	121	return;
	122
	123	align2 &= 7;
	124	if (align2 + len >= page_size)
	125	return;
	126
a334319f UD	127	s1 = buf1 + align1;
a334319f UD	128	s2 = buf2 + align2;
58ef9ef7 RM	129
	130	for (i = 0; i < len; ++i)
	131	s1[i] = 32 + 23 * i % (max_char - 32);
	132	s1[len] = 0;
	133	for (i = len + 1; i + align1 < page_size && i < len + 64; ++i)
	134	s1[i] = 32 + 32 * i % (max_char - 32);
	135
	136	if (HP_TIMING_AVAIL)
	137	printf ("Length %4zd, n %4zd, alignment %2zd/%2zd:", len, n, align1, align2);
	138
	139	FOR_EACH_IMPL (impl, 0)
	140	do_one_test (impl, s2, s1, len, n);
	141
	142	if (HP_TIMING_AVAIL)
	143	putchar ('\n');
	144	}
	145
	146	static void
	147	do_random_tests (void)
	148	{
739ca690	149	size_t i, j, n, align1, align2, len, size, mode;
58ef9ef7 RM	150	unsigned char *p1 = buf1 + page_size - 512;
	151	unsigned char *p2 = buf2 + page_size - 512;
	152	unsigned char *res;
	153
	154	for (n = 0; n < ITERATIONS; n++)
	155	{
739ca690 UD	156	mode = random ();
739ca690 UD	157	if (mode & 1)
58ef9ef7	158	{
739ca690 UD	159	size = random () & 255;
	160	align1 = 512 - size - (random () & 15);
	161	if (mode & 2)
	162	align2 = align1 - (random () & 24);
	163	else
	164	align2 = align1 - (random () & 31);
	165	if (mode & 4)
	166	{
	167	j = align1;
	168	align1 = align2;
	169	align2 = j;
	170	}
	171	if (mode & 8)
	172	len = size - (random () & 31);
	173	else
	174	len = 512;
	175	if (len >= 512)
	176	len = random () & 511;
58ef9ef7 RM	177	}
58ef9ef7 RM	178	else
739ca690 UD	179	{
	180	align1 = random () & 31;
	181	if (mode & 2)
	182	align2 = random () & 31;
	183	else
	184	align2 = align1 + (random () & 24);
	185	len = random () & 511;
	186	j = align1;
	187	if (align2 > j)
	188	j = align2;
	189	if (mode & 4)
	190	{
	191	size = random () & 511;
	192	if (size + j > 512)
	193	size = 512 - j - (random() & 31);
	194	}
	195	else
	196	size = 512 - j;
	197	if ((mode & 8) && len + j >= 512)
	198	len = 512 - j - (random () & 7);
	199	}
58ef9ef7 RM	200	j = len + align1 + 64;
	201	if (j > 512)
	202	j = 512;
	203	for (i = 0; i < j; i++)
	204	{
	205	if (i == len + align1)
	206	p1[i] = 0;
	207	else
	208	{
	209	p1[i] = random () & 255;
	210	if (i >= align1 && i < len + align1 && !p1[i])
	211	p1[i] = (random () & 127) + 3;
	212	}
	213	}
	214
	215	FOR_EACH_IMPL (impl, 1)
	216	{
	217	memset (p2 - 64, '\1', 512 + 64);
a334319f	218	res = CALL (impl, p2 + align2, p1 + align1, size);
58ef9ef7 RM	219	if (res != STRNCPY_RESULT (p2 + align2, len, size))
	220	{
	221	error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p",
	222	n, impl->name, align1, align2, len, res,
	223	STRNCPY_RESULT (p2 + align2, len, size));
	224	ret = 1;
	225	}
	226	for (j = 0; j < align2 + 64; ++j)
	227	{
	228	if (p2[j - 64] != '\1')
	229	{
	230	error (0, 0, "Iteration %zd - garbage before, %s (%zd, %zd, %zd)",
	231	n, impl->name, align1, align2, len);
	232	ret = 1;
	233	break;
	234	}
	235	}
	236	j = align2 + len + 1;
	237	if (size + align2 > j)
	238	j = size + align2;
	239	for (; j < 512; ++j)
	240	{
	241	if (p2[j] != '\1')
	242	{
	243	error (0, 0, "Iteration %zd - garbage after, %s (%zd, %zd, %zd)",
	244	n, impl->name, align1, align2, len);
	245	ret = 1;
	246	break;
	247	}
	248	}
	249	for (j = align2 + len + 1; j < align2 + size; ++j)
	250	if (p2[j])
	251	{
	252	error (0, 0, "Iteration %zd - garbage after size, %s (%zd, %zd, %zd)",
	253	n, impl->name, align1, align2, len);
	254	ret = 1;
	255	break;
	256	}
	257	j = len + 1;
	258	if (size < j)
	259	j = size;
	260	if (memcmp (p1 + align1, p2 + align2, j))
	261	{
	262	error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd)",
	263	n, impl->name, align1, align2, len);
	264	ret = 1;
	265	}
	266	}
	267	}
	268	}
	269
	270	int
	271	test_main (void)
	272	{
	273	size_t i;
	274
	275	test_init ();
	276
	277	printf ("%28s", "");
	278	FOR_EACH_IMPL (impl, 0)
	279	printf ("\t%s", impl->name);
	280	putchar ('\n');
	281
	282	for (i = 1; i < 8; ++i)
283	{
284	do_test (i, i, 16, 16, 127);
285	do_test (i, i, 16, 16, 255);
286	do_test (i, 2 * i, 16, 16, 127);
287	do_test (2 * i, i, 16, 16, 255);
288	do_test (8 - i, 2 * i, 1 << i, 2 << i, 127);
289	do_test (2 * i, 8 - i, 2 << i, 1 << i, 127);
290	do_test (8 - i, 2 * i, 1 << i, 2 << i, 255);
291	do_test (2 * i, 8 - i, 2 << i, 1 << i, 255);
292	}
293
294	for (i = 1; i < 8; ++i)
295	{
296	do_test (0, 0, 4 << i, 8 << i, 127);
297	do_test (0, 0, 16 << i, 8 << i, 127);
298	do_test (8 - i, 2 * i, 4 << i, 8 << i, 127);
299	do_test (8 - i, 2 * i, 16 << i, 8 << i, 127);
300	}
301
302	do_random_tests ();
303	return ret;
304	}
305
306	#include "../test-skeleton.c"