usr/src/cmd/audio/include/archdep.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 1992-2001 by Sun Microsystems, Inc.
  24  * All rights reserved.
  25  */
  26
  27 #ifndef _MULTIMEDIA_ARCHDEP_H
  28 #define _MULTIMEDIA_ARCHDEP_H
  29
  30 #pragma ident   "%Z%%M% %I%     %E% SMI"
  31
  32 #ifdef __cplusplus
  33 extern "C" {
  34 #endif
  35
  36 /*
  37  * Machine-dependent and implementation-dependent definitions
  38  * are placed here so that source code can be portable among a wide
  39  * variety of machines.
  40  */
  41
  42 /*
  43  * The following macros are used to generate architecture-specific
  44  * code for handling byte-ordering correctly.
  45  *
  46  * Note that these macros *do not* work for in-place transformations.
  47  */
  48
  49 #if defined(mc68000) || defined(sparc)
  50 #define DECODE_SHORT(from, to)  *((short *)(to)) = *((short *)(from))
  51 #define DECODE_LONG(from, to)   *((long *)(to)) = *((long *)(from))
  52 #define DECODE_FLOAT(from, to)  *((float *)(to)) = *((float *)(from))
  53 #define DECODE_DOUBLE(from, to) *((double *)(to)) = *((double *)(from))
  54 #endif /* big-endian */
  55
  56 #if defined(i386) || defined(__ppc)
  57 #define DECODE_SHORT(from, to)                                          \
  58                             ((char *)(to))[0] = ((char *)(from))[1];    \
  59                             ((char *)(to))[1] = ((char *)(from))[0];
  60 #define DECODE_LONG(from, to)                                           \
  61                             ((char *)(to))[0] = ((char *)(from))[3];    \
  62                             ((char *)(to))[1] = ((char *)(from))[2];    \
  63                             ((char *)(to))[2] = ((char *)(from))[1];    \
  64                             ((char *)(to))[3] = ((char *)(from))[0];
  65
  66 #define DECODE_FLOAT(from, to)          DECODE_LONG((to), (from))
  67
  68 #define DECODE_DOUBLE(from, to)                                         \
  69                             ((char *)(to))[0] = ((char *)(from))[7];    \
  70                             ((char *)(to))[1] = ((char *)(from))[6];    \
  71                             ((char *)(to))[2] = ((char *)(from))[5];    \
  72                             ((char *)(to))[3] = ((char *)(from))[4];    \
  73                             ((char *)(to))[4] = ((char *)(from))[3];    \
  74                             ((char *)(to))[5] = ((char *)(from))[2];    \
  75                             ((char *)(to))[6] = ((char *)(from))[1];    \
  76                             ((char *)(to))[7] = ((char *)(from))[0];
  77 #endif /* little-endian */
  78
  79
  80 /* Most architectures are symmetrical with respect to conversions. */
  81 #if defined(mc68000) || defined(sparc) || defined(i386) || defined(__ppc)
  82 #define ENCODE_SHORT(from, to)          DECODE_SHORT((from), (to))
  83 #define ENCODE_LONG(from, to)           DECODE_LONG((from), (to))
  84 #define ENCODE_FLOAT(from, to)          DECODE_FLOAT((from), (to))
  85 #define ENCODE_DOUBLE(from, to)         DECODE_DOUBLE((from), (to))
  86
  87 /* Define types of specific length */
  88 typedef char            i_8;
  89 typedef short           i_16;
  90 typedef int             i_32;
  91 typedef unsigned char   u_8;
  92 typedef unsigned short  u_16;
  93 typedef unsigned        u_32;
  94
  95 #endif /* Sun machines */
  96
  97 #ifdef __cplusplus
  98 }
  99 #endif
 100
 101 #endif /* !_MULTIMEDIA_ARCHDEP_H */