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/***************************************************************************
kbinarybytecodec.cpp - description
-------------------
begin : Mo Nov 29 2004
copyright : (C) 2004 by Friedrich W. H. Kossebau
email : [email protected]
***************************************************************************/
/***************************************************************************
* *
* This library is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Library General Public *
* License version 2 as published by the Free Software Foundation. *
* *
***************************************************************************/
// lib specific
#include "kbinarybytecodec.h"
using namespace KHE;
void KBinaryByteCodec::encode( QString &Digits, unsigned int Pos, const unsigned char Char ) const
{
for( unsigned char M=1<<7; M>0; M>>=1 )
Digits.at(Pos++) = (Char & M) ? '1' : '0';
}
void KBinaryByteCodec::encodeShort( QString &Digits, unsigned int Pos, unsigned char Char ) const
{
unsigned char M = 1<<7;
// find first set bit
for( ; M>0; M>>=1 )
if( Char & M )
break;
// now set the
for( ; M>0; M>>=1 )
Digits.at(Pos++) = (Char & M) ? '1' : '0';
}
bool KBinaryByteCodec::isValidDigit( unsigned char Digit ) const
{
return Digit == '0' || Digit == '1';
}
bool KBinaryByteCodec::turnToValue( unsigned char *Digit ) const
{
if( isValidDigit(*Digit) )
{
*Digit -= '0';
return true;
}
return false;
}
bool KBinaryByteCodec::appendDigit( unsigned char *Byte, unsigned char Digit ) const
{
if( turnToValue(&Digit) )
{
unsigned char B = *Byte;
if( B < 128 )
{
B <<= 1;
B += Digit;
*Byte = B;
return true;
}
}
return false;
}
void KBinaryByteCodec::removeLastDigit( unsigned char *Byte ) const
{
*Byte >>= 1;
}
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