tar.h

[詳解]

/*==========================================================================*/
/* Lhaz TARクラス                                           lhaz@chitora.jp */
/*==========================================================================*/
#ifndef _CTAR_H
#define _CTAR_H
 
#include <stdio.h>
#include <time.h>
#include "lhazarc.h"
#include "../zlib/zlib.h"
#include "mybuf.h"
#include "mystr.h"
 
class CTAR {
public:
    enum COMPLETE { ARC_NO_ERROR, ARC_CANCELED, ARC_STOPPED, ARC_ERROR, ARC_CANTOPEN };
    //
    CTAR(const MYSTR& arcname);
    virtual ‾CTAR(void);
    //
    static long     CalcSum(char* s, size_t size);
    static CTAR*    Create(ARCHIVE::TYPE type, gzFile fptar, FILE* fp, const char* arcname = NULL);
    //
    bool            Compress(const char* name);
    COMPLETE        Extract(bool& overwrite, bool& skipflag, bool verify, bool show_progress);
    bool            Get(unsigned long* crc = NULL);
    char*           GetMagicCode(void)          { return MagicCode; }
    char*           GetName(void) const         { return Name;      }
    LONGLONG        GetSize(void) const         { return Size;      }
    time_t          GetTime(void) const         { return Time;      }
    char            GetType(void) const         { return Type;      }
    bool            IsDir(void) const           { return mIsDir;    }
    void            SetZoneIdentifer(const MYBUF& zi) { ZoneIdentifier = zi; }
    bool            SkipData(void);
    virtual size_t  TarRead(void *buf, size_t size, unsigned long* crc = NULL) = 0;
    bool            WriteBlank(void);
    bool            WriteHeader(FILE* fp);
 
protected:
    LONGLONG        Size;
    MYBUF           ZoneIdentifier;
 
private:
    static const char MAGIC_CODE[8];
    static const char MAGIC_CODE_GNU[8];
    static const char LONG_LINK[];
    //
    char*           Name;
    char            Atrib[8];
    char            UserID[8];
    char            GroupID[8];
    char            SizeOct[12];
    time_t          Time;
    char            TimeOct[12];
    long            CheckSum;
    char            CheckSumOct[8];
    char            Type;
    char            Link[100];
    char            MagicCode[8];
    char            UserName[32];
    char            GroupName[32];
    char            MjDeviceNum[8];
    char            MnDeviceNum[8];
    char            LastAccessTime[12];
    char            CreateTime[12];
    char            Offset[12];
    char            Dummy[512 - 100 - 8 - 8 - 8 - 12 - 12 - 8 - 1 - 100 - 8 - 32 - 32 - 8 - 8 - 12 - 12 - 12];
    char            Prefix[155];
    char            Pad[12];
    //
    MYSTR           ArcName;
    long            CalcedSum;
    bool            mIsDir;
    //
    bool            ReadCalcSum(char* d, size_t size, long& sum, unsigned long* crc = NULL);
    bool            WriteHeader(void);
    bool            WriteData(const char* name);
    bool            isDir(char type, char* name);
    virtual int     TarSeek(fpos_t offset, int origin) = 0;
    virtual size_t  TarWrite(const void* buf, size_t size, bool eof = false) = 0;
 
};
 
#endif