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309 lines
7.0 KiB
C
309 lines
7.0 KiB
C
/* Test and measure strncpy functions.
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Copyright (C) 1999-2012 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Written by Jakub Jelinek <jakub@redhat.com>, 1999.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef STRNCPY_RESULT
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# define STRNCPY_RESULT(dst, len, n) dst
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# define TEST_MAIN
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# define TEST_NAME "strncpy"
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# include "test-string.h"
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char *simple_strncpy (char *, const char *, size_t);
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char *stupid_strncpy (char *, const char *, size_t);
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IMPL (stupid_strncpy, 0)
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IMPL (simple_strncpy, 0)
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IMPL (strncpy, 1)
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char *
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simple_strncpy (char *dst, const char *src, size_t n)
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{
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char *ret = dst;
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while (n--)
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if ((*dst++ = *src++) == '\0')
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{
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while (n--)
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*dst++ = '\0';
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return ret;
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}
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return ret;
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}
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char *
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stupid_strncpy (char *dst, const char *src, size_t n)
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{
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size_t nc = strnlen (src, n);
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size_t i;
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for (i = 0; i < nc; ++i)
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dst[i] = src[i];
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for (; i < n; ++i)
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dst[i] = '\0';
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return dst;
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}
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#endif
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typedef char *(*proto_t) (char *, const char *, size_t);
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static void
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do_one_test (impl_t *impl, char *dst, const char *src, size_t len, size_t n)
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{
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if (CALL (impl, dst, src, n) != STRNCPY_RESULT (dst, len, n))
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{
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error (0, 0, "Wrong result in function %s %p %p", impl->name,
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CALL (impl, dst, src, n), dst);
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ret = 1;
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return;
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}
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if (memcmp (dst, src, len > n ? n : len) != 0)
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{
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error (0, 0, "Wrong result in function %s", impl->name);
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ret = 1;
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return;
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}
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if (n > len)
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{
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size_t i;
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for (i = len; i < n; ++i)
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if (dst [i] != '\0')
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{
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error (0, 0, "Wrong result in function %s", impl->name);
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ret = 1;
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return;
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}
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}
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if (HP_TIMING_AVAIL)
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{
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hp_timing_t start __attribute__ ((unused));
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hp_timing_t stop __attribute__ ((unused));
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hp_timing_t best_time = ~ (hp_timing_t) 0;
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size_t i;
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for (i = 0; i < 32; ++i)
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{
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HP_TIMING_NOW (start);
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CALL (impl, dst, src, n);
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HP_TIMING_NOW (stop);
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HP_TIMING_BEST (best_time, start, stop);
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}
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printf ("\t%zd", (size_t) best_time);
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}
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}
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static void
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do_test (size_t align1, size_t align2, size_t len, size_t n, int max_char)
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{
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size_t i;
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char *s1, *s2;
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align1 &= 7;
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if (align1 + len >= page_size)
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return;
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align2 &= 7;
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if (align2 + len >= page_size)
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return;
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s1 = (char *) (buf1 + align1);
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s2 = (char *) (buf2 + align2);
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for (i = 0; i < len; ++i)
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s1[i] = 32 + 23 * i % (max_char - 32);
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s1[len] = 0;
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for (i = len + 1; i + align1 < page_size && i < len + 64; ++i)
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s1[i] = 32 + 32 * i % (max_char - 32);
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if (HP_TIMING_AVAIL)
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printf ("Length %4zd, n %4zd, alignment %2zd/%2zd:", len, n, align1, align2);
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FOR_EACH_IMPL (impl, 0)
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do_one_test (impl, s2, s1, len, n);
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if (HP_TIMING_AVAIL)
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putchar ('\n');
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}
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static void
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do_random_tests (void)
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{
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size_t i, j, n, align1, align2, len, size, mode;
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unsigned char *p1 = buf1 + page_size - 512;
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unsigned char *p2 = buf2 + page_size - 512;
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unsigned char *res;
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for (n = 0; n < ITERATIONS; n++)
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{
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mode = random ();
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if (mode & 1)
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{
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size = random () & 255;
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align1 = 512 - size - (random () & 15);
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if (mode & 2)
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align2 = align1 - (random () & 24);
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else
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align2 = align1 - (random () & 31);
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if (mode & 4)
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{
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j = align1;
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align1 = align2;
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align2 = j;
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}
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if (mode & 8)
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len = size - (random () & 31);
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else
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len = 512;
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if (len >= 512)
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len = random () & 511;
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}
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else
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{
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align1 = random () & 31;
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if (mode & 2)
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align2 = random () & 31;
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else
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align2 = align1 + (random () & 24);
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len = random () & 511;
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j = align1;
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if (align2 > j)
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j = align2;
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if (mode & 4)
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{
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size = random () & 511;
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if (size + j > 512)
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size = 512 - j - (random() & 31);
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}
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else
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size = 512 - j;
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if ((mode & 8) && len + j >= 512)
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len = 512 - j - (random () & 7);
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}
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j = len + align1 + 64;
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if (j > 512)
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j = 512;
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for (i = 0; i < j; i++)
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{
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if (i == len + align1)
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p1[i] = 0;
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else
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{
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p1[i] = random () & 255;
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if (i >= align1 && i < len + align1 && !p1[i])
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p1[i] = (random () & 127) + 3;
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}
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}
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FOR_EACH_IMPL (impl, 1)
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{
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memset (p2 - 64, '\1', 512 + 64);
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res = (unsigned char *) CALL (impl,
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(char *) (p2 + align2),
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(char *) (p1 + align1), size);
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if (res != STRNCPY_RESULT (p2 + align2, len, size))
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{
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error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p",
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n, impl->name, align1, align2, len, res,
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STRNCPY_RESULT (p2 + align2, len, size));
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ret = 1;
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}
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for (j = 0; j < align2 + 64; ++j)
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{
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if (p2[j - 64] != '\1')
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{
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error (0, 0, "Iteration %zd - garbage before, %s (%zd, %zd, %zd)",
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n, impl->name, align1, align2, len);
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ret = 1;
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break;
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}
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}
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j = align2 + len + 1;
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if (size + align2 > j)
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j = size + align2;
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for (; j < 512; ++j)
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{
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if (p2[j] != '\1')
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{
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error (0, 0, "Iteration %zd - garbage after, %s (%zd, %zd, %zd)",
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n, impl->name, align1, align2, len);
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ret = 1;
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break;
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}
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}
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for (j = align2 + len + 1; j < align2 + size; ++j)
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if (p2[j])
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{
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error (0, 0, "Iteration %zd - garbage after size, %s (%zd, %zd, %zd)",
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n, impl->name, align1, align2, len);
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ret = 1;
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break;
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}
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j = len + 1;
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if (size < j)
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j = size;
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if (memcmp (p1 + align1, p2 + align2, j))
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{
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error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd)",
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n, impl->name, align1, align2, len);
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ret = 1;
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}
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}
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}
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}
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int
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test_main (void)
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{
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size_t i;
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test_init ();
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printf ("%28s", "");
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FOR_EACH_IMPL (impl, 0)
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printf ("\t%s", impl->name);
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putchar ('\n');
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for (i = 1; i < 8; ++i)
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{
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do_test (i, i, 16, 16, 127);
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do_test (i, i, 16, 16, 255);
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do_test (i, 2 * i, 16, 16, 127);
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do_test (2 * i, i, 16, 16, 255);
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do_test (8 - i, 2 * i, 1 << i, 2 << i, 127);
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do_test (2 * i, 8 - i, 2 << i, 1 << i, 127);
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do_test (8 - i, 2 * i, 1 << i, 2 << i, 255);
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do_test (2 * i, 8 - i, 2 << i, 1 << i, 255);
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}
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for (i = 1; i < 8; ++i)
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{
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do_test (0, 0, 4 << i, 8 << i, 127);
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do_test (0, 0, 16 << i, 8 << i, 127);
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do_test (8 - i, 2 * i, 4 << i, 8 << i, 127);
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do_test (8 - i, 2 * i, 16 << i, 8 << i, 127);
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}
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do_random_tests ();
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return ret;
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}
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#include "../test-skeleton.c"
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