libaegis/output/gzip.h

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//
//      aegis - project change supervisor
//      Copyright (C) 1999, 2002, 2005, 2006, 2008 Peter Miller
//
//      This program is free software; you can redistribute it and/or modify
//      it under the terms of the GNU General Public License as published by
//      the Free Software Foundation; either version 3 of the License, or
//      (at your option) any later version.
//
//      This program is distributed in the hope that it will be useful,
//      but WITHOUT ANY WARRANTY; without even the implied warranty of
//      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//      GNU General Public License for more details.
//
//      You should have received a copy of the GNU General Public License
//      along with this program. If not, see
//      <http://www.gnu.org/licenses/>.
//

#ifndef LIBAEGIS_OUTPUT_GZIP_H
#define LIBAEGIS_OUTPUT_GZIP_H

#include <common/ac/zlib.h>

#include <libaegis/output.h>

class output_gzip:
    public output
{
public:
    virtual ~output_gzip();

private:
    output_gzip(const output::pointer &deeper);

public:
    static pointer create(const output::pointer &deeper);

protected:
    // See base class for documentation.
    nstring filename() const;

    // See base class for documentation.
    long ftell_inner() const;

    // See base class for documentation.
    void write_inner(const void *data, size_t length);

    // See base class for documentation.
    int page_width() const;

    // See base class for documentation.
    int page_length() const;

    // See base class for documentation.
    const char *type_name() const;

    // See base class for documentation.
    void end_of_line_inner();

private:
    output::pointer deeper;

    z_stream stream;

    Byte *outbuf;

    uLong crc;

    long pos;

    bool bol;

    void drop_dead(int err);

    output_gzip();

    output_gzip(const output_gzip &);

    output_gzip &operator=(const output_gzip &);
};

#endif // LIBAEGIS_OUTPUT_GZIP_H

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