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1.1 ! root 1: /* xpendian.h */ ! 2: ! 3: /* Macros to convert integer "endianness" */ ! 4: ! 5: /* $Id: xpendian.h,v 1.4 2004/08/26 21:51:54 rswindell Exp $ */ ! 6: ! 7: /**************************************************************************** ! 8: * @format.tab-size 4 (Plain Text/Source Code File Header) * ! 9: * @format.use-tabs true (see http://www.synchro.net/ptsc_hdr.html) * ! 10: * * ! 11: * Copyright 2004 Rob Swindell - http://www.synchro.net/copyright.html * ! 12: * * ! 13: * This library is free software; you can redistribute it and/or * ! 14: * modify it under the terms of the GNU Lesser General Public License * ! 15: * as published by the Free Software Foundation; either version 2 * ! 16: * of the License, or (at your option) any later version. * ! 17: * See the GNU Lesser General Public License for more details: lgpl.txt or * ! 18: * http://www.fsf.org/copyleft/lesser.html * ! 19: * * ! 20: * Anonymous FTP access to the most recent released source is available at * ! 21: * ftp://vert.synchro.net, ftp://cvs.synchro.net and ftp://ftp.synchro.net * ! 22: * * ! 23: * Anonymous CVS access to the development source and modification history * ! 24: * is available at cvs.synchro.net:/cvsroot/sbbs, example: * ! 25: * cvs -d :pserver:[email protected]:/cvsroot/sbbs login * ! 26: * (just hit return, no password is necessary) * ! 27: * cvs -d :pserver:[email protected]:/cvsroot/sbbs checkout src * ! 28: * * ! 29: * For Synchronet coding style and modification guidelines, see * ! 30: * http://www.synchro.net/source.html * ! 31: * * ! 32: * You are encouraged to submit any modifications (preferably in Unix diff * ! 33: * format) via e-mail to [email protected] * ! 34: * * ! 35: * Note: If this box doesn't appear square, then you need to fix your tabs. * ! 36: ****************************************************************************/ ! 37: ! 38: #ifndef _XPENDIAN_H ! 39: #define _XPENDIAN_H ! 40: ! 41: /************************/ ! 42: /* byte-swapping macros */ ! 43: /************************/ ! 44: #define BYTE_SWAP_16(x) ((((short)(x)&0xff00)>>8) | (((short)(x)&0x00ff)<<8)) ! 45: #define BYTE_SWAP_32(x) ((((long)(x)&0xff000000)>>24) | (((long)(x)&0x00ff0000)>>8) | (((long)(x)&0x0000ff00)<<8) | (((long)(x)&0x000000ff)<<24)) ! 46: ! 47: /* these may need to be updated for > 32-bit platforms */ ! 48: #define BYTE_SWAP_SHORT(x) BYTE_SWAP_16(x) ! 49: #define BYTE_SWAP_LONG(x) BYTE_SWAP_32(x) ! 50: ! 51: /* auto-detect integer size */ ! 52: #define BYTE_SWAP_INT(x) (sizeof(x)==sizeof(short) ? BYTE_SWAP_SHORT(x) : sizeof(x)==sizeof(long) ? BYTE_SWAP_LONG(x) : (x)) ! 53: ! 54: /********************************/ ! 55: /* Architecture-specific macros */ ! 56: /********************************/ ! 57: #ifdef __BIG_ENDIAN__ /* e.g. Motorola */ ! 58: ! 59: #define BE_SHORT(x) (x) ! 60: #define BE_LONG(x) (x) ! 61: #define BE_INT(x) (x) ! 62: #define LE_SHORT(x) BYTE_SWAP_SHORT(x) ! 63: #define LE_LONG(x) BYTE_SWAP_LONG(x) ! 64: #define LE_INT(x) BYTE_SWAP_INT(x) ! 65: ! 66: #else /* Little Endian (e.g. Intel) */ ! 67: ! 68: #define LE_SHORT(x) (x) ! 69: #define LE_LONG(x) (x) ! 70: #define LE_INT(x) (x) ! 71: #define BE_SHORT(x) BYTE_SWAP_SHORT(x) ! 72: #define BE_LONG(x) BYTE_SWAP_LONG(x) ! 73: #define BE_INT(x) BYTE_SWAP_INT(x) ! 74: ! 75: #endif ! 76: ! 77: #endif /* Don't add anything after this line */
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