207 lines
7.0 KiB
C
207 lines
7.0 KiB
C
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/****************************************************************************
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*
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* Open Watcom Project
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*
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* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
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*
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* ========================================================================
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*
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* This file contains Original Code and/or Modifications of Original
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* Code as defined in and that are subject to the Sybase Open Watcom
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* Public License version 1.0 (the 'License'). You may not use this file
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* except in compliance with the License. BY USING THIS FILE YOU AGREE TO
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* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
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* provided with the Original Code and Modifications, and is also
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* available at www.sybase.com/developer/opensource.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
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* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
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* NON-INFRINGEMENT. Please see the License for the specific language
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* governing rights and limitations under the License.
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*
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* ========================================================================
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*
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* Description: Common type definitions and macros widely used by Open
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* Watcom tools.
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*
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****************************************************************************/
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#ifndef _WATCOM_H_INCLUDED_
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#define _WATCOM_H_INCLUDED_
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#include <errno.h>
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#ifndef __WATCOMC__
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#include "clibext.h"
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#endif
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#if !defined(__sun__) && !defined(sun) && !defined(__sgi) && !defined(__hppa) && !defined(_AIX) && !defined(__alpha) && !defined(_TYPES_H_) && !defined(_SYS_TYPES_H)
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typedef unsigned uint;
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#endif
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typedef unsigned char uint_8;
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typedef unsigned short uint_16;
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#if defined (LONG_IS_64BITS)
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typedef unsigned int uint_32;
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#else
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typedef unsigned long uint_32;
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#endif
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typedef unsigned char unsigned_8;
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typedef unsigned short unsigned_16;
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#if defined (LONG_IS_64BITS)
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typedef unsigned int unsigned_32;
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#else
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typedef unsigned long unsigned_32;
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#endif
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typedef signed char int_8;
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typedef signed short int_16;
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#if defined (LONG_IS_64BITS)
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typedef signed int int_32;
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#else
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typedef signed long int_32;
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#endif
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typedef signed char signed_8;
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typedef signed short signed_16;
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#if defined (LONG_IS_64BITS)
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typedef signed int signed_32;
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#else
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typedef signed long signed_32;
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#endif
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typedef struct {
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union {
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unsigned_32 _32[2];
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unsigned_16 _16[4];
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unsigned_8 _8[8];
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struct {
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#if defined( __BIG_ENDIAN__ )
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unsigned v : 1;
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unsigned : 15;
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unsigned : 16;
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unsigned : 16;
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unsigned : 16;
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#else
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unsigned : 16;
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unsigned : 16;
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unsigned : 16;
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unsigned : 15;
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unsigned v : 1;
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#endif
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} sign;
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#if defined(__WATCOM_INT64__) || defined(__GNUC__)
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unsigned long long _64[1];
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#endif
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} u;
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} unsigned_64;
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typedef unsigned_64 signed_64;
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/* Macros for low/high end access on little and big endian machines */
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#if defined( __BIG_ENDIAN__ )
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#define I64LO32 1
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#define I64HI32 0
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#define I64LO16 3
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#define I64HI16 0
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#define I64LO8 7
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#define I64HI8 0
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#else
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#define I64LO32 0
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#define I64HI32 1
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#define I64LO16 0
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#define I64HI16 3
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#define I64LO8 0
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#define I64HI8 7
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#endif
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/* Define _crtn for prototypes for external C routines called from C++.
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* Eg. extern _crtn void Foo();
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*/
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#if !defined( _crtn )
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#if defined( __cplusplus )
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#define _crtn "C"
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#else
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#define _crtn
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#endif
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#endif
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/* Macros for little/big endian conversion; These exist to simplify writing
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* code that handles both little and big endian data on either little or big
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* endian host platforms. Some of these macros could be implemented as inline
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* assembler where instructions to byte swap data in registers or read/write
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* memory access with byte swapping is available.
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*
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* NOTE: The SWAP_XX macros will swap data in place. If you only want to take a
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* a copy of the data and leave the original intact, then use the SWAPNC_XX
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* macros.
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*/
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#define SWAPNC_16(w) (\
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(((w) & 0x000000FFUL) << 8) |\
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(((w) & 0x0000FF00UL) >> 8)\
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)
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#define SWAPNC_32(w) (\
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(((w) & 0x000000FFUL) << 24) |\
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(((w) & 0x0000FF00UL) << 8) |\
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(((w) & 0x00FF0000UL) >> 8) |\
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(((w) & 0xFF000000UL) >> 24)\
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)
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#define SWAPNC_64(w) (\
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(((w) & 0x00000000000000FFULL) << 56) |\
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(((w) & 0x000000000000FF00ULL) << 40) |\
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(((w) & 0x0000000000FF0000ULL) << 24) |\
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(((w) & 0x00000000FF000000ULL) << 8) |\
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(((w) & 0x000000FF00000000ULL) >> 8) |\
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(((w) & 0x0000FF0000000000ULL) >> 24) |\
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(((w) & 0x00FF000000000000ULL) >> 40) |\
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(((w) & 0xFF00000000000000ULL) >> 56)\
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)
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#if defined( __BIG_ENDIAN__ )
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/* Macros to get little endian data */
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#define GET_LE_16(w) SWAPNC_16(w)
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#define GET_LE_32(w) SWAPNC_32(w)
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#define GET_LE_64(w) SWAPNC_64(w)
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/* Macros to get big endian data */
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#define GET_BE_16(w) (w)
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#define GET_BE_32(w) (w)
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#define GET_BE_64(w) (w)
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/* Macros to convert little endian data in place */
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#define CONV_LE_16(w) (w) = SWAPNC_16(w)
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#define CONV_LE_32(w) (w) = SWAPNC_32(w)
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#define CONV_LE_64(w) (w) = SWAPNC_64(w)
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/* Macros to convert big endian data in place */
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#define CONV_BE_16(w)
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#define CONV_BE_32(w)
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#define CONV_BE_64(w)
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/* Macros to swap byte order */
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#define SWAP_16 CONV_LE_16
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#define SWAP_32 CONV_LE_32
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#define SWAP_64 CONV_LE_64
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#else
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/* Macros to get little endian data */
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#define GET_LE_16(w) (w)
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#define GET_LE_32(w) (w)
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#define GET_LE_64(w) (w)
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/* Macros to get big endian data */
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#define GET_BE_16(w) SWAPNC_16(w)
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#define GET_BE_32(w) SWAPNC_32(w)
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#define GET_BE_64(w) SWAPNC_64(w)
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/* Macros to convert little endian data in place */
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#define CONV_LE_16(w)
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#define CONV_LE_32(w)
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#define CONV_LE_64(w)
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/* Macros to convert big endian data in place */
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#define CONV_BE_16(w) (w) = SWAPNC_16(w)
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#define CONV_BE_32(w) (w) = SWAPNC_32(w)
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#define CONV_BE_64(w) (w) = SWAPNC_64(w)
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/* Macros to swap byte order */
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#define SWAP_16 CONV_BE_16
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#define SWAP_32 CONV_BE_32
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#define SWAP_64 CONV_BE_64
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#endif
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#endif
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