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114 lines
3.1 KiB
114 lines
3.1 KiB
/***************************************************************************
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khexadecimalbytecodec.cpp - description
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-------------------
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begin : Mo Nov 29 2004
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copyright : (C) 2004 by Friedrich W. H. Kossebau
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email : Friedrich.W.H@Kossebau.de
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***************************************************************************/
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/***************************************************************************
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* *
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* This library is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU Library General Public *
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* License version 2 as published by the Free Software Foundation. *
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* *
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***************************************************************************/
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// lib specific
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#include "khexadecimalbytecodec.h"
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using namespace KHE;
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static const TQChar BigDigit[16] =
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{ '0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F' };
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static const TQChar SmallDigit[16] =
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{ '0','1','2','3','4','5','6','7','8','9','a','b','c','d','e','f' };
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KHexadecimalByteCodec::KHexadecimalByteCodec( bool S ) : Digit( S?SmallDigit:BigDigit ) {}
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bool KHexadecimalByteCodec::setSmallDigits( bool S )
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{
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bool Change = ( S && Digit == BigDigit );
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Digit = S?SmallDigit:BigDigit;
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return Change;
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}
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bool KHexadecimalByteCodec::smallDigits() const { return Digit != BigDigit; }
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void KHexadecimalByteCodec::encode( TQString &Digits, unsigned int Pos, unsigned char Char ) const
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{
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Digits.at(Pos++) = Digit[Char>>4];
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Digits.at(Pos) = Digit[Char&0x0F];
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}
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void KHexadecimalByteCodec::encodeShort( TQString &Digits, unsigned int Pos, unsigned char Char ) const
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{
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unsigned char C;
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if( (C = (Char>>4)) )
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Digits.at(Pos++) = Digit[C];
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Digits.at(Pos) = Digit[Char&0x0F];
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}
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static inline bool isValidBigDigit( unsigned char Digit )
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{
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return (Digit >= 'A' && Digit <= 'F');
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}
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static inline bool isValidSmallDigit( unsigned char Digit )
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{
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return (Digit >= 'a' && Digit <= 'f');
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}
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static inline bool isValidDecimalDigit( unsigned char Digit )
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{
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return Digit >= '0' && Digit <= '9';
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}
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bool KHexadecimalByteCodec::isValidDigit( unsigned char Digit ) const
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{
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return isValidDecimalDigit(Digit) || isValidBigDigit(Digit) || isValidSmallDigit(Digit);
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}
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bool KHexadecimalByteCodec::turnToValue( unsigned char *Digit ) const
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{
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if( isValidDecimalDigit(*Digit) )
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*Digit -= '0';
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else if( isValidBigDigit(*Digit) )
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*Digit -= 'A' - 10;
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else if( isValidSmallDigit(*Digit) )
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*Digit -= 'a' - 10;
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else
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return false;
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return true;
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}
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bool KHexadecimalByteCodec::appendDigit( unsigned char *Byte, unsigned char Digit ) const
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{
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if( turnToValue(&Digit) )
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{
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unsigned char B = *Byte;
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if( B < 16 )
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{
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B <<= 4;
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B += Digit;
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*Byte = B;
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return true;
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}
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}
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return false;
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}
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void KHexadecimalByteCodec::removeLastDigit( unsigned char *Byte ) const
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{
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*Byte >>= 4;
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}
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