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/***************************************************************************
khexadecimalbytecodec.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 "khexadecimalbytecodec.h"
using namespace KHE;
static const QChar BigDigit[16] =
{ '0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F' };
static const QChar SmallDigit[16] =
{ '0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f' };
KHexadecimalByteCodec::KHexadecimalByteCodec( bool S ) : Digit( S?SmallDigit:BigDigit ) {}
bool KHexadecimalByteCodec::setSmallDigits( bool S )
{
bool Change = ( S && Digit == BigDigit );
Digit = S?SmallDigit:BigDigit;
return Change;
}
bool KHexadecimalByteCodec::smallDigits() const { return Digit != BigDigit; }
void KHexadecimalByteCodec::encode( QString &Digits, unsigned int Pos, unsigned char Char ) const
{
Digits.at(Pos++) = Digit[Char>>4];
Digits.at(Pos) = Digit[Char&0x0F];
}
void KHexadecimalByteCodec::encodeShort( QString &Digits, unsigned int Pos, unsigned char Char ) const
{
unsigned char C;
if( (C = (Char>>4)) )
Digits.at(Pos++) = Digit[C];
Digits.at(Pos) = Digit[Char&0x0F];
}
static inline bool isValidBigDigit( unsigned char Digit )
{
return (Digit >= 'A' && Digit <= 'F');
}
static inline bool isValidSmallDigit( unsigned char Digit )
{
return (Digit >= 'a' && Digit <= 'f');
}
static inline bool isValidDecimalDigit( unsigned char Digit )
{
return Digit >= '0' && Digit <= '9';
}
bool KHexadecimalByteCodec::isValidDigit( unsigned char Digit ) const
{
return isValidDecimalDigit(Digit) || isValidBigDigit(Digit) || isValidSmallDigit(Digit);
}
bool KHexadecimalByteCodec::turnToValue( unsigned char *Digit ) const
{
if( isValidDecimalDigit(*Digit) )
*Digit -= '0';
else if( isValidBigDigit(*Digit) )
*Digit -= 'A' - 10;
else if( isValidSmallDigit(*Digit) )
*Digit -= 'a' - 10;
else
return false;
return true;
}
bool KHexadecimalByteCodec::appendDigit( unsigned char *Byte, unsigned char Digit ) const
{
if( turnToValue(&Digit) )
{
unsigned char B = *Byte;
if( B < 16 )
{
B <<= 4;
B += Digit;
*Byte = B;
return true;
}
}
return false;
}
void KHexadecimalByteCodec::removeLastDigit( unsigned char *Byte ) const
{
*Byte >>= 4;
}
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