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[/] [openrisc/] [trunk/] [rtos/] [ecos-3.0/] [packages/] [net/] [bsd_tcpip/] [current/] [include/] [sys/] [endian.h] - Rev 856
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//========================================================================== // // include/sys/endian.h // //========================================================================== // ####BSDCOPYRIGHTBEGIN#### // ------------------------------------------- // This file is part of eCos, the Embedded Configurable Operating System. // // Portions of this software may have been derived from FreeBSD // or other sources, and if so are covered by the appropriate copyright // and license included herein. // // Portions created by the Free Software Foundation are // Copyright (C) 2002 Free Software Foundation, Inc. // ------------------------------------------- // ####BSDCOPYRIGHTEND#### //========================================================================== //========================================================================== // // include/sys/endian.h // // // //========================================================================== //#####DESCRIPTIONBEGIN#### // // Author(s): gthomas // Contributors: gthomas // Date: 2000-01-10 // Purpose: // Description: // // //####DESCRIPTIONEND#### // //========================================================================== /* $OpenBSD: endian.h,v 1.4 1999/07/21 05:58:25 csapuntz Exp $ */ /*- * Copyright (c) 1997 Niklas Hallqvist. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Niklas Hallqvist. * 4. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * Generic definitions for little- and big-endian systems. Other endianesses * has to be dealt with in the specific machine/endian.h file for that port. * * This file is meant to be included from a little- or big-endian port's * machine/endian.h after setting BYTE_ORDER to either 1234 for little endian * or 4321 for big.. */ #ifndef _SYS_ENDIAN_H_ #define _SYS_ENDIAN_H_ #include <cyg/hal/basetype.h> #if CYG_BYTEORDER == CYG_MSBFIRST #define BYTE_ORDER BIG_ENDIAN #else #define BYTE_ORDER LITTLE_ENDIAN #endif #ifndef _POSIX_SOURCE #define LITTLE_ENDIAN 1234 #define BIG_ENDIAN 4321 #define PDP_ENDIAN 3412 #ifdef __GNUC__ #define __swap16gen(x) ({ \ cyg_uint16 __swap16gen_x = (x); \ \ (cyg_uint16)((__swap16gen_x & 0xff) << 8 | \ (__swap16gen_x & 0xff00) >> 8); \ }) #define __swap32gen(x) ({ \ cyg_uint32 __swap32gen_x = (x); \ \ (cyg_uint32)((__swap32gen_x & 0xff) << 24 | \ (__swap32gen_x & 0xff00) << 8 | \ (__swap32gen_x & 0xff0000) >> 8 | \ (__swap32gen_x & 0xff000000) >> 24); \ }) #else /* __GNUC__ */ /* Note that these macros evaluate their arguments several times. */ #define __swap16gen(x) \ (cyg_uint16)(((cyg_uint16)(x) & 0xff) << 8 | ((cyg_uint16)(x) & 0xff00) >> 8) #define __swap32gen(x) \ (cyg_uint32)(((cyg_uint32)(x) & 0xff) << 24 | \ ((cyg_uint32)(x) & 0xff00) << 8 | ((cyg_uint32)(x) & 0xff0000) >> 8 | \ ((cyg_uint32)(x) & 0xff000000) >> 24) #endif /* __GNUC__ */ /* * Define MD_SWAP if you provide swap{16,32}md functions/macros that are * optimized for your architecture, These will be used for swap{16,32} * unless the argument is a constant and we are using GCC, where we can * take advantage of the CSE phase much better by using the generic version. */ #ifdef MD_SWAP #if __GNUC__ #define swap16(x) ({ \ cyg_uint16 __swap16_x = (x); \ \ __builtin_constant_p(x) ? __swap16gen(__swap16_x) : \ __swap16md(__swap16_x); \ }) #define swap32(x) ({ \ cyg_uint32 __swap32_x = (x); \ \ __builtin_constant_p(x) ? __swap32gen(__swap32_x) : \ __swap32md(__swap32_x); \ }) #endif /* __GNUC__ */ #else /* MD_SWAP */ #define swap16 __swap16gen #define swap32 __swap32gen #endif /* MD_SWAP */ #define swap16_multi(v, n) do { \ size_t __swap16_multi_n = (n); \ cyg_uint16 *__swap16_multi_v = (v); \ \ while (__swap16_multi_n) { \ *__swap16_multi_v = swap16(*__swap16_multi_v); \ __swap16_multi_v++; \ __swap16_multi_n--; \ } \ } while (0) cyg_uint32 htobe32 __P((cyg_uint32)); cyg_uint16 htobe16 __P((cyg_uint16)); cyg_uint32 betoh32 __P((cyg_uint32)); cyg_uint16 betoh16 __P((cyg_uint16)); cyg_uint32 htole32 __P((cyg_uint32)); cyg_uint16 htole16 __P((cyg_uint16)); cyg_uint32 letoh32 __P((cyg_uint32)); cyg_uint16 letoh16 __P((cyg_uint16)); #if BYTE_ORDER == LITTLE_ENDIAN /* Can be overridden by machine/endian.h before inclusion of this file. */ #ifndef _QUAD_HIGHWORD #define _QUAD_HIGHWORD 1 #endif #ifndef _QUAD_LOWWORD #define _QUAD_LOWWORD 0 #endif #define htobe16 swap16 #define htobe32 swap32 #define betoh16 swap16 #define betoh32 swap32 #define htole16(x) (x) #define htole32(x) (x) #define letoh16(x) (x) #define letoh32(x) (x) #endif /* BYTE_ORDER */ #if BYTE_ORDER == BIG_ENDIAN /* Can be overridden by machine/endian.h before inclusion of this file. */ #ifndef _QUAD_HIGHWORD #define _QUAD_HIGHWORD 0 #endif #ifndef _QUAD_LOWWORD #define _QUAD_LOWWORD 1 #endif #define htole16 swap16 #define htole32 swap32 #define letoh16 swap16 #define letoh32 swap32 #define htobe16(x) (x) #define htobe32(x) (x) #define betoh16(x) (x) #define betoh32(x) (x) #endif /* BYTE_ORDER */ #define htons htobe16 #define htonl htobe32 #define ntohs betoh16 #define ntohl betoh32 #define NTOHL(x) (x) = ntohl((cyg_uint32)(x)) #define NTOHS(x) (x) = ntohs((cyg_uint16)(x)) #define HTONL(x) (x) = htonl((cyg_uint32)(x)) #define HTONS(x) (x) = htons((cyg_uint16)(x)) #endif /* _POSIX_SOURCE */ #endif /* _SYS_ENDIAN_H_ */
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