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58 lines
1001 B
C
58 lines
1001 B
C
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/*
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File: EndianAware.h
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Contains: macros for 68K clients that are aware of platform endian-ness
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Written by: Craig Prouse
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Copyright: <EFBFBD> 1993 by Apple Computer, Inc., all rights reserved.
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Change History (most recent first):
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<SM2> 12/1/93 chp Give inline functions external C linkage to make #pragma
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parameter work in C++ builds.
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<SM1> 11/10/93 fau first checked in
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*/
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#ifndef __ENDIANAWARE__
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#define __ENDIANAWARE__
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#ifndef littleEndian
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#define littleEndian 1
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#endif
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#if littleEndian
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#ifdef __cplusplus
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extern "C" {
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#endif
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#pragma parameter __D0 EndianSwap16 (__D0)
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unsigned short EndianSwap16 (unsigned short) =
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{
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0xE158 // ROL.W #8,D0
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};
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#pragma parameter __D0 EndianSwap32 (__D0)
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unsigned long EndianSwap32 (unsigned long) =
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{
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0xE158, // ROL.W #8,D0
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0x4840, // SWAP D0
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0xE158 // ROL.W #8,D0
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};
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#ifdef __cplusplus
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}
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#endif
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#else
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#define EndianSwap16(a) (a)
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#define EndianSwap32(a) (a)
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#endif litteEndian
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#endif __ENDIANAWARE__
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