ref: 54838652fce0316fa8bd186265be50d3f631b5e4
dir: /sys/src/games/doom/m_swap.c/
// Emacs style mode select -*- C++ -*- //----------------------------------------------------------------------------- // // $Id:$ // // Copyright (C) 1993-1996 by id Software, Inc. // // This source is available for distribution and/or modification // only under the terms of the DOOM Source Code License as // published by id Software. All rights reserved. // // The source is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License // for more details. // // $Log:$ // // DESCRIPTION: // Endianess handling, swapping 16bit and 32bit. // //----------------------------------------------------------------------------- static const char rcsid[] = "$Id: m_bbox.c,v 1.1 1997/02/03 22:45:10 b1 Exp $"; #ifdef __GNUG__ #pragma implementation "m_swap.h" #endif #include "m_swap.h" // Not needed with little endian. #ifdef __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