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CPIOInputStream.h

Go to the documentation of this file.

#ifndef CLASSLIB_CPIO_INPUT_STREAM_H
# define CLASSLIB_CPIO_INPUT_STREAM_H

//<<<<<< INCLUDES                                                       >>>>>>

# include "classlib/zip/CPIOConstants.h"
# include "classlib/iotools/FilterInputStream.h"
# include <string>

namespace lat {
//<<<<<< PUBLIC DEFINES                                                 >>>>>>
//<<<<<< PUBLIC CONSTANTS                                               >>>>>>
//<<<<<< PUBLIC TYPES                                                   >>>>>>

class CPIOMember;

//<<<<<< PUBLIC VARIABLES                                               >>>>>>
//<<<<<< PUBLIC FUNCTIONS                                               >>>>>>
//<<<<<< CLASS DECLARATIONS                                             >>>>>>

class CPIOInputStream : public FilterInputStream, public CPIOConstants
{
public:
    CPIOInputStream (InputStream *input);
    ~CPIOInputStream (void);
    // no copy constructor
    // no assignment operator

    using FilterInputStream::read;
    virtual CPIOMember *nextMember (void);
    virtual IOSize      available (void);
    virtual IOSize      read (void *into, IOSize n);
    virtual IOSize      skip (IOSize n);
    virtual void        closeMember (void);

    virtual void        close (void);
    virtual void        reset (void);

private:
    CPIOMember *        readPosixHeader (void);
    CPIOMember *        readSvrHeader (bool check);

    bool                checkHex   (const void *buf, IOSize length);
    bool                checkOctal (const void *buf, IOSize length);

    int                 m_format;       //< Archive format (one of magic values)
    CPIOMember          *m_current;     //< Current member
    IOOffset            m_remaining;    //< Bytes left of current member
    unsigned            m_checksum;     //< Checksum for the file contents.
    unsigned            m_sum;          //< Checksum for data read so far.
    bool                m_check;        //< Flag indicating #m_checksum is valid.
};

//<<<<<< INLINE PUBLIC FUNCTIONS                                        >>>>>>
//<<<<<< INLINE MEMBER FUNCTIONS                                        >>>>>>

} // namespace lat
#endif // CLASSLIB_CPIO_INPUT_STREAM_H

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