67 lines
2.1 KiB
C
67 lines
2.1 KiB
C
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/*******************************************************************/
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/* Copyright(c) 1995 Microsoft Corporation */
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/*******************************************************************/
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//***
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//
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// Filename: utils.h
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//
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// Description: Contains miscellaneous utilities
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//
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// Author: Stefan Solomon (stefans) May 10, 1995.
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//
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// Revision History:
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//
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//***
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#ifndef _UTILS_
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#define _UTILS_
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/*
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* The following macros deal with on-the-wire short and long values
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*
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* On the wire format is big-endian i.e. a long value of 0x01020304 is
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* represented as 01 02 03 04.
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* Similarly a short value of 0x0102 is represented as 01 02.
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*
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* The host format is not assumed since it will vary from processor to
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* processor.
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*/
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// Get a short from on-the-wire format to a USHORT in the host format
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#define GETSHORT2USHORT(DstPtr, SrcPtr) \
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*(PUSHORT)(DstPtr) = ((*((PUCHAR)(SrcPtr)+0) << 8) + \
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(*((PUCHAR)(SrcPtr)+1) ))
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// Get a long from on-the-wire format to a ULONG in the host format
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#define GETLONG2ULONG(DstPtr, SrcPtr) \
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*(PULONG)(DstPtr) = ((*((PUCHAR)(SrcPtr)+0) << 24) + \
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(*((PUCHAR)(SrcPtr)+1) << 16) + \
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(*((PUCHAR)(SrcPtr)+2) << 8) + \
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(*((PUCHAR)(SrcPtr)+3) ))
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// Put a USHORT from the host format to a short to on-the-wire format
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#define PUTUSHORT2SHORT(DstPtr, Src) \
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*((PUCHAR)(DstPtr)+0) = (UCHAR) ((USHORT)(Src) >> 8), \
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*((PUCHAR)(DstPtr)+1) = (UCHAR)(Src)
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// Put a ULONG from the host format to an array of 4 UCHARs on-the-wire format
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#define PUTULONG2LONG(DstPtr, Src) \
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*((PUCHAR)(DstPtr)+0) = (UCHAR) ((ULONG)(Src) >> 24), \
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*((PUCHAR)(DstPtr)+1) = (UCHAR) ((ULONG)(Src) >> 16), \
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*((PUCHAR)(DstPtr)+2) = (UCHAR) ((ULONG)(Src) >> 8), \
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*((PUCHAR)(DstPtr)+3) = (UCHAR) (Src)
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// Get a short from on-the-wire format to a USHORT in the host format
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#define GETSHORT2USHORTdirect(SrcPtr) \
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((*((PUCHAR)(SrcPtr)+0) << 8) + (*((PUCHAR)(SrcPtr)+1) ))
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// Get a long from on-the-wire format to a ULONG in the host format
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#define GETLONG2ULONGdirect(SrcPtr) \
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((*((PUCHAR)(SrcPtr)+0) << 24) + \
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(*((PUCHAR)(SrcPtr)+1) << 16) + \
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(*((PUCHAR)(SrcPtr)+2) << 8) + \
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(*((PUCHAR)(SrcPtr)+3) ))
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#endif // _UTILS_
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