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/*
* Copyright (C) 2007-2012 Xagasoft, All rights reserved.
*
* This file is part of the libbu++ library and is released under the
* terms of the license contained in the file LICENSE.
*/
#include "bu/hex.h"
Bu::Hex::Hex( Bu::Stream &rNext, bool bUpperCase, int iChunk ) :
Bu::Filter( rNext ),
iChunk( iChunk ),
iPos( 0 ),
iIn( 0 ),
sChrs(bUpperCase?"0123456789ABCDEF":"0123456789abcdef")
{
}
Bu::Hex::~Hex()
{
}
void Bu::Hex::start()
{
iPos = iIn = 0;
}
Bu::size Bu::Hex::stop()
{
return iPos;
}
Bu::size Bu::Hex::read( void *pBuf, Bu::size iBytes )
{
Bu::size j;
uint8_t *puBuf = (uint8_t *)pBuf;
for( j = 0; j < iBytes; j++ )
{
for(; iIn < 2; iIn++ )
{
if( rNext.read( &cIn[iIn], 1 ) == 0 )
return j;
if( cIn[iIn] == ' ' || cIn[iIn] == '\t' ||
cIn[iIn] == '\n' || cIn[iIn] == '\r' )
iIn--;
}
#define chr2nibble( c ) ((c>='0'&&c<='9')?(c-'0'):((c|0x60)-'a'+10))
puBuf[j] = ((chr2nibble(cIn[0])<<4)|chr2nibble(cIn[1]));
iIn = 0;
}
return j;
}
Bu::size Bu::Hex::write( const void *pBuf, Bu::size iBytes )
{
char cOut[2];
uint8_t *puBuf = (uint8_t *)pBuf;
for( Bu::size j = 0; j < iBytes; j++ )
{
cOut[0] = sChrs[(puBuf[j]&0xf0)>>4];
cOut[1] = sChrs[(puBuf[j]&0x0f)];
if( iChunk > 0 && iPos%iChunk == 0 && iPos>0 )
rNext.write(" ", 1 );
rNext.write( cOut, 2 );
iPos++;
}
return iBytes;
}
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