libaegis/wide_output/to_narrow.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_WIDE_OUTPUT_TO_NARROW_H
#define LIBAEGIS_WIDE_OUTPUT_TO_NARROW_H

#include <libaegis/output.h>
#include <libaegis/wide_output.h>

class wide_output_to_narrow:
    public wide_output
{
public:
    virtual ~wide_output_to_narrow();

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

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

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

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

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

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

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

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

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

private:
    output::pointer deeper;
    mbstate_t state;
    bool prev_was_newline;

    wide_output_to_narrow();

    wide_output_to_narrow(const wide_output_to_narrow &);

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

#endif // LIBAEGIS_WIDE_OUTPUT_TO_NARROW_H