aboutsummaryrefslogtreecommitdiff
path: root/string/test-strncmp.c
diff options
context:
space:
mode:
authorRoland McGrath <roland@gnu.org>2002-11-07 19:15:01 +0000
committerRoland McGrath <roland@gnu.org>2002-11-07 19:15:01 +0000
commit58ef9ef7bcbe3df172d9ff5fa840a63d89a19df4 (patch)
tree707f53302db4e5a0d10362716902c53222dfb939 /string/test-strncmp.c
parentcbf900b43010058d8489ce32ae43fb06a66410c1 (diff)
downloadglibc-58ef9ef7bcbe3df172d9ff5fa840a63d89a19df4.zip
glibc-58ef9ef7bcbe3df172d9ff5fa840a63d89a19df4.tar.gz
glibc-58ef9ef7bcbe3df172d9ff5fa840a63d89a19df4.tar.bz2
* string/test-string.h: New file.
* string/test-strlen.c: New file. * string/test-string.h: New file. * string/test-strcmp.c: New file. * string/test-strchr.c: New file. * string/test-strrchr.c: New file. * string/test-strcpy.c: New file. * string/test-stpcpy.c: New file. * string/test-strncpy.c: New file. * string/test-stpncpy.c: New file. * string/test-strpbrk.c: New file. * string/test-strcspn.c: New file. * string/test-strspn.c: New file. * string/test-strcat.c: New file. * string/test-strncmp.c: New file. * string/test-memchr.c: New file. * string/test-memcmp.c: New file. * string/test-memset.c: New file. * string/test-memcpy.c: New file. * string/test-mempcpy.c: New file. * string/test-memmove.c: New file. * string/Makefile (strop-tests): New variable. (tests): Add strop-tests. (distribute): Add test-string.h.
Diffstat (limited to 'string/test-strncmp.c')
-rw-r--r--string/test-strncmp.c259
1 files changed, 259 insertions, 0 deletions
diff --git a/string/test-strncmp.c b/string/test-strncmp.c
new file mode 100644
index 0000000..b02b987
--- /dev/null
+++ b/string/test-strncmp.c
@@ -0,0 +1,259 @@
+/* Test and measure strncmp functions.
+ Copyright (C) 1999, 2002 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. */
+
+#define TEST_MAIN
+#include "test-string.h"
+
+typedef int (*proto_t) (const char *, const char *, size_t);
+int simple_strncmp (const char *, const char *, size_t);
+
+IMPL (simple_strncmp, 0)
+IMPL (strncmp, 1)
+
+int
+simple_strncmp (const char *s1, const char *s2, size_t n)
+{
+ int ret = 0;
+
+ while (n-- && (ret = *(unsigned char *) s1 - * (unsigned char *) s2++) == 0
+ && *s1++);
+ return ret;
+}
+
+static void
+do_one_test (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;
+ }
+
+ if (HP_TIMING_AVAIL)
+ {
+ hp_timing_t start, stop, best_time = ~ (hp_timing_t) 0;
+ size_t i;
+
+ for (i = 0; i < 32; ++i)
+ {
+ HP_TIMING_NOW (start);
+ CALL (impl, s1, s2, 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,
+ int exp_result)
+{
+ size_t i;
+ char *s1, *s2;
+
+ if (n == 0)
+ return;
+
+ align1 &= 7;
+ if (align1 + n + 1 >= page_size)
+ return;
+
+ align2 &= 7;
+ if (align2 + n + 1 >= page_size)
+ return;
+
+ s1 = buf1 + align1;
+ s2 = buf2 + align2;
+
+ for (i = 0; i < n; i++)
+ s1[i] = s2[i] = 1 + 23 * i % max_char;
+
+ s1[n] = 24 + exp_result;
+ s2[n] = 23;
+ s1[len] = 0;
+ s2[len] = 0;
+ if (exp_result < 0)
+ s2[len] = 32;
+ else if (exp_result > 0)
+ s1[len] = 64;
+ if (len >= n)
+ s2[n - 1] -= exp_result;
+
+ if (HP_TIMING_AVAIL)
+ printf ("Length %4zd/%4zd, alignment %2zd/%2zd:", len, n, align1, align2);
+
+ FOR_EACH_IMPL (impl, 0)
+ do_one_test (impl, s1, s2, n, exp_result);
+
+ if (HP_TIMING_AVAIL)
+ putchar ('\n');
+}
+
+static void
+do_random_tests (void)
+{
+ size_t i, j, n, align1, align2, pos, len, size;
+ int result, 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;
+ size = random () & 511;
+ j = align1;
+ if (align2 > j)
+ j = align2;
+ if (pos + j >= 511)
+ pos = 510 - j - (random () & 7);
+ len = random () & 511;
+ if (pos >= len)
+ len = pos + (random () & 7);
+ 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;
+ if (i < len + align1 && !p1[i])
+ {
+ p1[i] = random () & 255;
+ if (!p1[i])
+ p1[i] = 1 + (random () & 127);
+ }
+ }
+ for (i = 0; i < j; ++i)
+ {
+ p2[i] = random () & 255;
+ if (i < len + align2 && !p2[i])
+ {
+ p2[i] = random () & 255;
+ if (!p2[i])
+ p2[i] = 1 + (random () & 127);
+ }
+ }
+
+ result = 0;
+ memcpy (p2 + align2, p1 + align1, pos);
+ if (pos >= len)
+ {
+ p1[len + align1] = 0;
+ p2[len + align2] = 0;
+ }
+ else
+ {
+ 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 (pos < size)
+ {
+ if (p1[align1 + pos] < p2[align2 + pos])
+ result = -1;
+ else
+ result = 1;
+ }
+ }
+
+ FOR_EACH_IMPL (impl, 1)
+ {
+ r = CALL (impl, p1 + align1, p2 + align2, size);
+ 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) %d != %d, p1 %p p2 %p",
+ n, impl->name, align1, align2, len, pos, size, r, result, p1, p2);
+ ret = 1;
+ }
+ }
+ }
+}
+
+int
+test_main (void)
+{
+ size_t i;
+
+ test_init ();
+
+ printf ("%23s", "");
+ FOR_EACH_IMPL (impl, 0)
+ printf ("\t%s", impl->name);
+ putchar ('\n');
+
+ for (i =0; i < 16; ++i)
+ {
+ do_test (0, 0, 8, i, 127, 0);
+ do_test (0, 0, 8, i, 127, -1);
+ do_test (0, 0, 8, i, 127, 1);
+ do_test (i, i, 8, i, 127, 0);
+ do_test (i, i, 8, i, 127, 1);
+ do_test (i, i, 8, i, 127, -1);
+ do_test (i, 2 * i, 8, i, 127, 0);
+ do_test (2 * i, i, 8, i, 127, 1);
+ do_test (i, 3 * i, 8, i, 127, -1);
+ do_test (0, 0, 8, i, 255, 0);
+ do_test (0, 0, 8, i, 255, -1);
+ do_test (0, 0, 8, i, 255, 1);
+ do_test (i, i, 8, i, 255, 0);
+ do_test (i, i, 8, i, 255, 1);
+ do_test (i, i, 8, i, 255, -1);
+ do_test (i, 2 * i, 8, i, 255, 0);
+ do_test (2 * i, i, 8, i, 255, 1);
+ do_test (i, 3 * i, 8, i, 255, -1);
+ }
+
+ for (i = 1; i < 8; ++i)
+ {
+ do_test (0, 0, 8 << i, 16 << i, 127, 0);
+ do_test (0, 0, 8 << i, 16 << i, 127, 1);
+ do_test (0, 0, 8 << i, 16 << i, 127, -1);
+ do_test (0, 0, 8 << i, 16 << i, 255, 0);
+ do_test (0, 0, 8 << i, 16 << i, 255, 1);
+ do_test (0, 0, 8 << i, 16 << i, 255, -1);
+ do_test (8 - i, 2 * i, 8 << i, 16 << i, 127, 0);
+ do_test (8 - i, 2 * i, 8 << i, 16 << i, 127, 1);
+ do_test (2 * i, i, 8 << i, 16 << i, 255, 0);
+ do_test (2 * i, i, 8 << i, 16 << i, 255, 1);
+ }
+
+ do_random_tests ();
+ return ret;
+}
+
+#include "../test-skeleton.c"