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authorMike Frysinger <vapier@gentoo.org>2008-01-05 09:22:58 +0000
committerMike Frysinger <vapier@gentoo.org>2008-01-05 09:22:58 +0000
commitc616287f88aeefcf81125f89978de57aaa52408d (patch)
tree8b541dc6f821bb42ba1c34ade3a4eb1d36d77b8a
parentd08085316bb279f35f41e80a8faa0a964be50b48 (diff)
patch from Mats Erik Andersson for better catching edge cases in optimized string functions
-rw-r--r--test/string/tester.c32
1 files changed, 24 insertions, 8 deletions
diff --git a/test/string/tester.c b/test/string/tester.c
index 71fee0c9b..647b8c174 100644
--- a/test/string/tester.c
+++ b/test/string/tester.c
@@ -1087,15 +1087,31 @@ test_strsep (void)
static void
test_memcmp (void)
{
+ int i, cnt = 1;
+ char one[21], two[21];
+
it = "memcmp";
- check(memcmp("a", "a", 1) == 0, 1); /* Identity. */
- check(memcmp("abc", "abc", 3) == 0, 2); /* Multicharacter. */
- check(memcmp("abcd", "abce", 4) < 0, 3); /* Honestly unequal. */
- check(memcmp("abce", "abcd", 4) > 0, 4);
- check(memcmp("alph", "beta", 4) < 0, 5);
- check(memcmp("a\203", "a\003", 2) > 0, 6);
- check(memcmp("abce", "abcd", 3) == 0, 7); /* Count limited. */
- check(memcmp("abc", "def", 0) == 0, 8); /* Zero count. */
+ check(memcmp("a", "a", 1) == 0, cnt++); /* Identity. */
+ check(memcmp("abc", "abc", 3) == 0, cnt++); /* Multicharacter. */
+ check(memcmp("abcd", "abcf", 4) < 0, cnt++); /* Honestly unequal. */
+ check(memcmp("abcf", "abcd", 4) > 0, cnt++);
+ check(memcmp("alph", "cold", 4) < 0, cnt++);
+ check(memcmp("a\203", "a\003", 2) > 0, cnt++);
+ check(memcmp("a\003", "a\203", 2) < 0, cnt++);
+ check(memcmp("a\003bc", "a\203bc", 2) < 0, cnt++);
+ check(memcmp("abc\203", "abc\003", 4) > 0, cnt++);
+ check(memcmp("abc\003", "abc\203", 4) < 0, cnt++);
+ check(memcmp("abcf", "abcd", 3) == 0, cnt++); /* Count limited. */
+ check(memcmp("abc", "def", 0) == 0, cnt++); /* Zero count. */
+ /* Comparisons with shifting 4-byte boundaries. */
+ for (i=0; i<4; i++)
+ {
+ char *a = one + i, *b = two + i;
+ strncpy( a, "--------11112222", 16);
+ strncpy( b, "--------33334444", 16);
+ check( memcmp(b, a, 16) > 0, cnt++);
+ check( memcmp(a, b, 16) < 0, cnt++);
+ }
}
static void