vlEncodingHelpers.h

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/******************************************************************************
** Copyright (c) 1992-2010 VT MAK
** All rights reserved.
******************************************************************************/

#pragma once

#include <stdint.h>

#ifdef DtUSE_UTILITIES_NAMESPACE
namespace DtUSE_UTILITIES_NAMESPACE
{
#endif

const int endianChecker = 1;
#define is_bigendian() ( (*(char*)&endianChecker) == 0 )

static void swapByteArray( char * byteArray, int theSize )
{
   int theEnd = 0;
   for( int i = 0; i < ( theSize >> 1 ); ++i )
   {
      theEnd = ( theSize - 1 ) - i;
      byteArray[ i ] ^= byteArray[ theEnd ];
      byteArray[ theEnd ] ^= byteArray[ i ];
      byteArray[ i ] ^= byteArray[ theEnd ];
   }
}

static DtU16 endianSwap16Bit( DtU16 rhs )
{
   unsigned short msbyte = rhs & 0x00ff;
   unsigned short lsbyte = ( rhs & 0xff00 ) >> 8;
   return ( msbyte << 8 ) | lsbyte;
}

static DtU32 endianSwap32Bit( DtU32 rhs )
{
   unsigned short msword = endianSwap16Bit( rhs & 0x0000ffff );
   unsigned short lsword = endianSwap16Bit(( rhs & 0xffff0000 ) >> 16 );
   return ( msword << 16 ) | lsword;
}

static DtU64 endianSwap64Bit( DtU64 rhs )
{
   unsigned int mspart = endianSwap32Bit( static_cast<unsigned int>(rhs & 0xffffffff) );
   unsigned int lspart = endianSwap32Bit(static_cast<unsigned int>(( rhs >> 32 ) & 0xffffffff) );
   return ( DtU64  ( mspart ) << 32 ) | lspart;
}

#ifdef DtUSE_UTILITIES_NAMESPACE
} 
#endif