// Emacs style mode select -*- C++ -*- //----------------------------------------------------------------------------- // // $Id: m_swap.c 8 2005-07-23 16:44:57Z fraggle $ // // Copyright(C) 1993-1996 Id Software, Inc. // Copyright(C) 2005 Simon Howard // // 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., 59 Temple Place - Suite 330, Boston, MA // 02111-1307, USA. // // $Log$ // Revision 1.2 2005/07/23 16:44:56 fraggle // Update copyright to GNU GPL // // Revision 1.1.1.1 2005/07/23 16:19:58 fraggle // Initial import // // // DESCRIPTION: // Endianess handling, swapping 16bit and 32bit. // //----------------------------------------------------------------------------- static const char rcsid[] = "$Id: m_swap.c 8 2005-07-23 16:44:57Z fraggle $"; #ifdef __GNUG__ #pragma implementation "m_swap.h" #endif #include "m_swap.h" // Not needed with big endian. #ifndef __BIG_ENDIAN__ // Swap 16bit, that is, MSB and LSB byte. unsigned short SwapSHORT(unsigned short x) { // No masking with 0xFF should be necessary. return (x>>8) | (x<<8); } // Swapping 32bit. unsigned long SwapLONG( unsigned long x) { return (x>>24) | ((x>>8) & 0xff00) | ((x<<8) & 0xff0000) | (x<<24); } #endif