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Annotation of elwix/tools/oldlzma/SRC/Common/CRC.h, revision 1.1.1.1

1.1       misho       1: // Common/CRC.h
                      2: 
                      3: #ifndef __COMMON_CRC_H
                      4: #define __COMMON_CRC_H
                      5: 
                      6: #include "Types.h"
                      7: 
                      8: class CCRC
                      9: {
                     10:   UInt32 _value;
                     11: public:
                     12:        static UInt32 Table[256];
                     13:        static void InitTable();
                     14: 
                     15:   CCRC():  _value(0xFFFFFFFF){};
                     16:   void Init() { _value = 0xFFFFFFFF; }
                     17:   void UpdateByte(Byte v);
                     18:   void UpdateUInt16(UInt16 v);
                     19:   void UpdateUInt32(UInt32 v);
                     20:   void UpdateUInt64(UInt64 v);
                     21:   void Update(const void *data, UInt32 size);
                     22:   UInt32 GetDigest() const { return _value ^ 0xFFFFFFFF; } 
                     23:   static UInt32 CalculateDigest(const void *data, UInt32 size)
                     24:   {
                     25:     CCRC crc;
                     26:     crc.Update(data, size);
                     27:     return crc.GetDigest();
                     28:   }
                     29:   static bool VerifyDigest(UInt32 digest, const void *data, UInt32 size)
                     30:   {
                     31:     return (CalculateDigest(data, size) == digest);
                     32:   }
                     33: };
                     34: 
                     35: #endif