[src/trunk]: src/sys/sys Cast the sizeof operator to unsigned int in the __NF...

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/769556bbec0a
branches:  trunk
changeset: 572420:769556bbec0a
user:      christos <christos%NetBSD.org@localhost>
date:      Sun Jan 02 18:33:14 2005 +0000

description:
Cast the sizeof operator to unsigned int in the __NFDBITS macro because it
is used as the RHS of a << operator. On machines where size_t is unsigned
long, and _LP64, we effectively get int32 << uint64 which is handled
differently in ansi c than K&R. In K&R the int32 would get promoted.

diffstat:

 sys/sys/types.h |  6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diffs (20 lines):

diff -r 85877c5e84ec -r 769556bbec0a sys/sys/types.h
--- a/sys/sys/types.h   Sun Jan 02 18:32:38 2005 +0000
+++ b/sys/sys/types.h   Sun Jan 02 18:33:14 2005 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: types.h,v 1.63 2004/04/21 01:05:43 christos Exp $      */
+/*     $NetBSD: types.h,v 1.64 2005/01/02 18:33:14 christos Exp $      */
 
 /*-
  * Copyright (c) 1982, 1986, 1991, 1993, 1994
@@ -298,7 +298,9 @@
  */
 #define        __NBBY  8               /* number of bits in a byte */
 typedef int32_t        __fd_mask;
-#define __NFDBITS      (sizeof(__fd_mask) * __NBBY)    /* bits per mask */
+
+/* bits per mask */
+#define __NFDBITS      ((unsigned int)sizeof(__fd_mask) * __NBBY)
 
 #ifndef howmany
 #define        __howmany(x, y) (((x) + ((y) - 1)) / (y))