endian.h
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上传日期:2007-04-14
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- /*
- * Copyright (c) 1983, 1989, 1993
- * The Regents of the University of California. 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 the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
- *
- * @(#)nameser.h 8.2 (Berkeley) 2/16/94
- * -
- * Portions Copyright (c) 1993 by Digital Equipment Corporation.
- *
- * Permission to use, copy, modify, and distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies, and that
- * the name of Digital Equipment Corporation not be used in advertising or
- * publicity pertaining to distribution of the document or software without
- * specific, written prior permission.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
- * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT
- * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
- * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
- * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
- * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
- * SOFTWARE.
- * -
- * --Copyright--
- */
- #ifndef _ENDIAN_H_
- #define _ENDIAN_H_
- #ifndef BYTE_ORDER
- #define LITTLE_ENDIAN 1234 /* least-significant byte first (vax, pc) */
- #define __LITTLE_ENDIAN 1234
- #define BIG_ENDIAN 4321 /* most-significant byte first (IBM, net) */
- #define __BIG_ENDIAN 4321
- #define PDP_ENDIAN 3412 /* LSB first in word, MSW first in long (pdp)*/
- #define __PDP_ENDIAN 3412
- #if defined(vax) || defined(ns32000) || defined(sun386) || defined(i386) ||
- defined(MIPSEL) || defined(_MIPSEL) || defined(BIT_ZERO_ON_RIGHT) ||
- defined(__alpha__) || defined(__alpha)
- #define BYTE_ORDER LITTLE_ENDIAN
- #define __BYTE_ORDER LITTLE_ENDIAN
- #endif
- #if defined(sel) || defined(pyr) || defined(mc68000) || defined(sparc) ||
- defined(is68k) || defined(tahoe) || defined(ibm032) || defined(ibm370) ||
- defined(MIPSEB) || defined(_MIPSEB) || defined(_IBMR2) ||
- defined(apollo) || defined(hp9000) || defined(hp9000s300) ||
- defined(hp9000s800) ||
- defined (BIT_ZERO_ON_LEFT)
- #define BYTE_ORDER BIG_ENDIAN
- #define __BYTE_ORDER BIG_ENDIAN
- #endif
- #endif /* BYTE_ORDER */
- #if !defined(BYTE_ORDER) || (BYTE_ORDER != BIG_ENDIAN
- && BYTE_ORDER != LITTLE_ENDIAN && BYTE_ORDER != PDP_ENDIAN)
- /* you must determine what the correct bit order is for
- * your compiler - the next line is an intentional error
- * which will force your compiles to bomb until you fix
- * the above macros.
- */
- #error "Undefined or invalid BYTE_ORDER";
- #endif
- #endif /* !_ENDIAN_H */