Sun Mar 17 07:19:33 1996 Roland McGrath <roland@charlie-brown.gnu.ai.mit.edu>cvs/libc-960318

	* db/Makefile (CFLAGS-hash_func.c): New variable; pass -Wno-unused.
	(CFLAGS): Append -Wno-unitialized.

	* sysdeps/alpha/memchr.S: New file.
	* sysdeps/alpha/memchr.c: Obsolete file removed.
	* string/tester.c: Soup up memchr tests.

1 files changed, 25 insertions, 0 deletions

diff --git a/string/tester.c b/string/tester.c
index 34d4e1c..d826ff7 100644
--- a/string/tester.c
+++ b/string/tester.c
@@ -375,6 +375,7 @@ DEFUN(main, (argc, argv), int argc AND char **argv)
   check(memchr("abcd", 'z', 4) == NULL, 1);	/* Not found. */
   (void) strcpy(one, "abcd");
   check(memchr(one, 'c', 4) == one+2, 2);	/* Basic test. */
+  check(memchr(one, ~0xff|'c', 4) == one+2, 2);	/* ignore highorder bits. */
   check(memchr(one, 'd', 4) == one+3, 3);	/* End of string. */
   check(memchr(one, 'a', 4) == one, 4);	/* Beginning. */
   check(memchr(one, '\0', 5) == one+4, 5);	/* Finding NUL. */
@@ -385,6 +386,30 @@ DEFUN(main, (argc, argv), int argc AND char **argv)
   (void) strcpy(one, "a\203b");
   check(memchr(one, 0203, 3) == one+1, 9);	/* Unsignedness. */
 
+  /* now test all possible alignment and length combinations to catch
+     bugs due to unrolled loops (assuming unrolling is limited to no
+     more than 128 byte chunks: */
+  {
+    char buf[128 + sizeof(long)];
+    long align, len, i, pos;
+
+    for (align = 0; align < sizeof(long); ++align) {
+      for (len = 0; len < sizeof(buf) - align; ++len) {
+	for (i = 0; i < len; ++i) {
+	  buf[align + i] = 'x';		/* don't depend on memset... */
+	}
+	for (pos = 0; pos < len; ++pos) {
+#if 0
+	  printf("align %d, len %d, pos %d\n", align, len, pos);
+#endif
+	  check(memchr(buf + align, 'x', len) == buf + align + pos, 10);
+	  check(memchr(buf + align, 'x', pos) == NULL, 11);
+	  buf[align + pos] = '-';
+	}
+      }
+    }
+  }
+
   /* memcpy - need not work for overlap.  */
   it = "memcpy";
   check(memcpy(one, "abc", 4) == one, 1);	/* Returned value. */