Crc32EthernetFast.h

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#ifndef Cpl_Checksum_Crc32EthernetFast_h_
#define Cpl_Checksum_Crc32EthernetFast_h_
/*-----------------------------------------------------------------------------
* This file is part of the Colony.Core Project.  The Colony.Core Project is an
* open source project with a BSD type of licensing agreement.  See the license
* agreement (license.txt) in the top/ directory or on the Internet at
* http://integerfox.com/colony.core/license.txt
*
* Copyright (c) 2014-2022  John T. Taylor
*
* Redistributions of the source code must retain the above copyright notice.
*----------------------------------------------------------------------------*/
/** @file */
 
#include "Cpl/Checksum/Api32.h"
 
 
 
///
namespace Cpl {
///
namespace Checksum {
 
/** This class provides an implementation for the 32 Bit "Ethernet"
    standard.  The CRC has following characteristics:
        o The polynomial is: x32 + x26 + x23 + x22 + x16 + x12 + x11 + x10 + x8 + x7 + x5 + x4 + x2 + x + 1
        o The Data bytes are NOT reflected
        o The remainder is NOT reflected.
        o The final remainder is NOT XOR'd
 */
class Crc32EthernetFast : public Api32
{
private:
    /// Calculated CRC value
    uint32_t    m_crc;
 
public:
    /// Constructor
    Crc32EthernetFast() noexcept;
 
 
public:
    /// See Cpl::Checksum::Api32
    void reset( void ) noexcept;
 
    /// See Cpl::Checksum::Api32
    void accumulate( const void* bytes, unsigned numbytes=1 ) noexcept;
 
    /// See Cpl::Checksum::Api32
    uint32_t finalize( void* destBuffer=0 ) noexcept;
 
    /// See Cpl::Checksum::Api32
    bool isOkay( void ) noexcept;
};
 
};      // end namespaces
};
#endif  // end header latch