From owner-freebsd-hackers@FreeBSD.ORG  Wed Jun  6 10:04:09 2012
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: hackers@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52])
	by hub.freebsd.org (Postfix) with ESMTP id F2F6C1065670
	for <hackers@freebsd.org>; Wed,  6 Jun 2012 10:04:09 +0000 (UTC)
	(envelope-from andrew@fubar.geek.nz)
Received: from smtp4.clear.net.nz (smtp4.clear.net.nz [203.97.37.64])
	by mx1.freebsd.org (Postfix) with ESMTP id B93728FC16
	for <hackers@freebsd.org>; Wed,  6 Jun 2012 10:04:09 +0000 (UTC)
Received: from mxin1-orange.clear.net.nz
	(lb2-srcnat.clear.net.nz [203.97.32.237])
	by smtp4.clear.net.nz (CLEAR Net Mail)
	with ESMTP id <0M5600DGTXADMS40@smtp4.clear.net.nz> for
	hackers@freebsd.org; Wed, 06 Jun 2012 22:04:02 +1200 (NZST)
Received: from 202-0-48-19.paradise.net.nz (HELO localhost) ([202.0.48.19])
	by smtpin1.paradise.net.nz with ESMTP; Wed, 06 Jun 2012 22:04:02 +1200
Date: Wed, 06 Jun 2012 22:03:33 +1200
From: Andrew Turner <andrew@fubar.geek.nz>
To: hackers@freebsd.org
Message-id: <20120606220333.28686407@fubar.geek.nz>
MIME-version: 1.0
X-Mailer: Claws Mail 3.8.0 (GTK+ 2.24.6; i386-portbld-freebsd8.0)
Content-type: text/plain; charset=US-ASCII
Content-transfer-encoding: 7bit
X-Pirate: Arrrr
Cc: 
Subject: Wide character types
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 06 Jun 2012 10:04:10 -0000

I've been working on getting the ARM EABI working with FreeBSD.

As part of the EABI spec the Procedure Call Standard for the ARM
Architecture (AAPCS) defines wchar_t as either an unsigned int or an
unsigned short with the former as the preferred type. FreeBSD defines
wchar_t as a __wchar_t, which is defined as a __ct_rune_t, which is
defined as an int.

wint_t and rune_t are also defined in terms of __ct_rune_t. wint_t must
be a signed type as it needs to hols a WEOF which is defined as -1.

The type of rune_t appears to need to be the same as wint_t as the tow*
and isw* functions are defined as taking a wint_t by the documentation
but __ct_rune_t in the code and compare this value against __rune_t
values.

My question is am I correct in thinking rune_t and wint_t should be
defined as __ct_rune_t with __ct_rune_t defined as an int while wchar_t
should be defined as an unsigned int in ARM EABI and defined as an int
elsewhere?

Andrew