From 0de43ce2dd69804ee4a9470b713a991d37192209 Mon Sep 17 00:00:00 2001 From: Jakub Zawadzki Date: Tue, 17 Dec 2013 21:36:33 +0000 Subject: Create sign extension routines in , use it in few places. svn path=/trunk/; revision=54197 --- wsutil/sign_ext.h | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 wsutil/sign_ext.h (limited to 'wsutil/sign_ext.h') diff --git a/wsutil/sign_ext.h b/wsutil/sign_ext.h new file mode 100644 index 0000000000..ef911829ae --- /dev/null +++ b/wsutil/sign_ext.h @@ -0,0 +1,50 @@ +/* + * sign_ext.h + * + * $Id$ + * + * Wireshark - Network traffic analyzer + * By Gerald Combs + * Copyright 1998 Gerald Combs + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#ifndef __WSUTIL_SIGN_EXT_H__ +#define __WSUTIL_SIGN_EXT_H__ + +#include + +/* sign extension routines */ + +static inline guint32 +ws_sign_ext32(guint32 val, int no_of_bits) +{ + if (val & (1 << (no_of_bits-1))) + val |= (-1 << no_of_bits); + + return val; +} _U_ + +static inline guint64 +ws_sign_ext64(guint64 val, int no_of_bits) +{ + if (val & (1LL << (no_of_bits-1))) + val |= (-1 << no_of_bits); + + return val; +} _U_ + +#endif /* __WSUTIL_SIGN_EXT_H__ */ -- cgit v1.2.1