Author: kevlo
Date: Wed Feb 8 08:42:17 2012
New Revision: 231191
URL: http://svn.freebsd.org/changeset/base/231191
Log:
Add offsetof.3 man page
Obtained from: OpenBSD
Added:
head/share/man/man3/offsetof.3 (contents, props changed)
Modified:
head/share/man/man3/Makefile
Modified: head/share/man/man3/Makefile
==============================================================================
--- head/share/man/man3/Makefile Wed Feb 8 07:34:03 2012
(r231190)
+++ head/share/man/man3/Makefile Wed Feb 8 08:42:17 2012
(r231191)
@@ -10,6 +10,7 @@ MAN= assert.3 \
fpgetround.3 \
intro.3 \
makedev.3 \
+ offsetof.3 \
${PTHREAD_MAN} \
queue.3 \
siginfo.3 \
Added: head/share/man/man3/offsetof.3
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/share/man/man3/offsetof.3 Wed Feb 8 08:42:17 2012
(r231191)
@@ -0,0 +1,47 @@
+.\" $OpenBSD: offsetof.3,v 1.2 2010/02/18 18:30:19 jmc Exp $
+.\"
+.\" Copyright (c) 2010 Thomas Pfaff <tpf...@tp76.info>
+.\"
+.\" Permission to use, copy, modify, and distribute this software for any
+.\" purpose with or without fee is hereby granted, provided that the above
+.\" copyright notice and this permission notice appear in all copies.
+.\"
+.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd February 18 2010
+.Dt OFFSETOF 3
+.Os
+.Sh NAME
+.Nm offsetof
+.Nd offset of a structure member
+.Sh SYNOPSIS
+.Fd #include <stddef.h>
+.Ft size_t
+.Fn offsetof "type" "member"
+.Sh DESCRIPTION
+The
+.Fn offsetof
+macro expands to an integer constant expression of type
+.Ft size_t
+and yields the offset,
+in bytes, of the field
+.Ar member
+from the start of the structure
+.Ar type .
+.Pp
+A compiler error will result if
+.Ar member
+is not aligned to a byte boundary (i.e. it is a bit-field).
+.Sh STANDARDS
+The
+.Fn offsetof
+macro conforms to
+.St -ansiC .
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