archdep.h revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1992-2001 by Sun Microsystems, Inc.
* All rights reserved.
*/
#ifndef _MULTIMEDIA_ARCHDEP_H
#define _MULTIMEDIA_ARCHDEP_H
#pragma ident "%Z%%M% %I% %E% SMI"
#ifdef __cplusplus
extern "C" {
#endif
/*
* Machine-dependent and implementation-dependent definitions
* are placed here so that source code can be portable among a wide
* variety of machines.
*/
/*
* The following macros are used to generate architecture-specific
* code for handling byte-ordering correctly.
*
* Note that these macros *do not* work for in-place transformations.
*/
#if defined(mc68000) || defined(sparc)
#define DECODE_SHORT(from, to) *((short *)(to)) = *((short *)(from))
#define DECODE_LONG(from, to) *((long *)(to)) = *((long *)(from))
#define DECODE_FLOAT(from, to) *((float *)(to)) = *((float *)(from))
#define DECODE_DOUBLE(from, to) *((double *)(to)) = *((double *)(from))
#endif /* big-endian */
#if defined(i386) || defined(__ppc)
#define DECODE_SHORT(from, to) \
((char *)(to))[0] = ((char *)(from))[1]; \
((char *)(to))[1] = ((char *)(from))[0];
#define DECODE_LONG(from, to) \
((char *)(to))[0] = ((char *)(from))[3]; \
((char *)(to))[1] = ((char *)(from))[2]; \
((char *)(to))[2] = ((char *)(from))[1]; \
((char *)(to))[3] = ((char *)(from))[0];
#define DECODE_FLOAT(from, to) DECODE_LONG((to), (from))
#define DECODE_DOUBLE(from, to) \
((char *)(to))[0] = ((char *)(from))[7]; \
((char *)(to))[1] = ((char *)(from))[6]; \
((char *)(to))[2] = ((char *)(from))[5]; \
((char *)(to))[3] = ((char *)(from))[4]; \
((char *)(to))[4] = ((char *)(from))[3]; \
((char *)(to))[5] = ((char *)(from))[2]; \
((char *)(to))[6] = ((char *)(from))[1]; \
((char *)(to))[7] = ((char *)(from))[0];
#endif /* little-endian */
/* Most architectures are symmetrical with respect to conversions. */
#if defined(mc68000) || defined(sparc) || defined(i386) || defined(__ppc)
#define ENCODE_SHORT(from, to) DECODE_SHORT((from), (to))
#define ENCODE_LONG(from, to) DECODE_LONG((from), (to))
#define ENCODE_FLOAT(from, to) DECODE_FLOAT((from), (to))
#define ENCODE_DOUBLE(from, to) DECODE_DOUBLE((from), (to))
/* Define types of specific length */
typedef char i_8;
typedef short i_16;
typedef int i_32;
typedef unsigned char u_8;
typedef unsigned short u_16;
typedef unsigned u_32;
#endif /* Sun machines */
#ifdef __cplusplus
}
#endif
#endif /* !_MULTIMEDIA_ARCHDEP_H */