| 0,0 → 1,75 |
|---|
| /* |
| byteswap.h - C preprocessor macros for byte swapping. |
| Copyright (C) 1995, 1996 Michael Riepe <michael@stud.uni-hannover.de> |
| |
| This library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Library General Public |
| License as published by the Free Software Foundation; either |
| version 2 of the License, or (at your option) any later version. |
| |
| This library 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 |
| Library General Public License for more details. |
| |
| You should have received a copy of the GNU Library General Public |
| License along with this library; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| */ |
| |
| /* @(#) $Id: byteswap.h,v 1.2 1996/10/22 16:45:54 michael Exp $ */ |
| |
| #ifndef _BYTESWAP_H |
| #define _BYTESWAP_H |
| |
| #define lu(from,i,s) (((long)((unsigned char*)(from))[i])<<(s)) |
| #define li(from,i,s) (((long)((signed char*)(from))[i])<<(s)) |
| |
| #define __load_u16L(from) ((unsigned long)(lu(from,1,8)|lu(from,0,0))) |
| #define __load_u16M(from) ((unsigned long)(lu(from,0,8)|lu(from,1,0))) |
| #define __load_i16L(from) ((long)(li(from,1,8)|lu(from,0,0))) |
| #define __load_i16M(from) ((long)(li(from,0,8)|lu(from,1,0))) |
| |
| #define __load_u32L(from) ((unsigned long)(lu(from,3,24)| \ |
| lu(from,2,16)| \ |
| lu(from,1,8)| \ |
| lu(from,0,0))) |
| #define __load_u32M(from) ((unsigned long)(lu(from,0,24)| \ |
| lu(from,1,16)| \ |
| lu(from,2,8)| \ |
| lu(from,3,0))) |
| #define __load_i32L(from) ((long)(li(from,3,24)| \ |
| lu(from,2,16)| \ |
| lu(from,1,8)| \ |
| lu(from,0,0))) |
| #define __load_i32M(from) ((long)(li(from,0,24)| \ |
| lu(from,1,16)| \ |
| lu(from,2,8)| \ |
| lu(from,3,0))) |
| |
| #define su(to,i,v,s) (((char*)(to))[i]=((unsigned long)(v)>>(s))) |
| #define si(to,i,v,s) (((char*)(to))[i]=((long)(v)>>(s))) |
| |
| #define __store_u16L(to,v) (su(to,1,v,8),su(to,0,v,0)) |
| #define __store_u16M(to,v) (su(to,0,v,8),su(to,1,v,0)) |
| #define __store_i16L(to,v) (si(to,1,v,8),si(to,0,v,0)) |
| #define __store_i16M(to,v) (si(to,0,v,8),si(to,1,v,0)) |
| |
| #define __store_u32L(to,v) (su(to,3,v,24), \ |
| su(to,2,v,16), \ |
| su(to,1,v,8), \ |
| su(to,0,v,0)) |
| #define __store_u32M(to,v) (su(to,0,v,24), \ |
| su(to,1,v,16), \ |
| su(to,2,v,8), \ |
| su(to,3,v,0)) |
| #define __store_i32L(to,v) (si(to,3,v,24), \ |
| si(to,2,v,16), \ |
| si(to,1,v,8), \ |
| si(to,0,v,0)) |
| #define __store_i32M(to,v) (si(to,0,v,24), \ |
| si(to,1,v,16), \ |
| si(to,2,v,8), \ |
| si(to,3,v,0)) |
| |
| #endif /* _BYTESWAP_H */ |