coco
37 lines
820 B
C++
37 lines
820 B
C++
// Crc16.h: interface for the Crc16 class.
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//
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//////////////////////////////////////////////////////////////////////
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#if !defined(AFX_CRC16_H__8BE9FD91_A066_4984_AEBA_EA04F8836263__INCLUDED_)
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#define AFX_CRC16_H__8BE9FD91_A066_4984_AEBA_EA04F8836263__INCLUDED_
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#if _MSC_VER > 1000
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#pragma once
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#endif // _MSC_VER > 1000
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class Crc16
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{
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private :
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static unsigned short table[ 256 ];
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static int initialized;
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unsigned short crc;
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public :
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Crc16( unsigned short init_value );
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void update( int c );
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unsigned short value( void ){ return crc; }
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// public:
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// Crc16();
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// virtual ~Crc16();
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};
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inline void Crc16::update( int c )
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{
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crc = (unsigned short)
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( table[ (( crc >> 8 ) & 0xff ) ] ^
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( crc << 8 ) ^ ( c & 0xff ) );
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}
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#endif // !defined(AFX_CRC16_H__8BE9FD91_A066_4984_AEBA_EA04F8836263__INCLUDED_)
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