io.h

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#ifndef IO_H
#define IO_H
#pragma once
/***************************************************************************
 *   Copyright (C) 2004, 2006 Symbian Software Ltd.                        *
 *   All rights reserved.                                                  *
 *   Copyright (C) 2007-2013 Mike Kinghan, imk@burroingroingjoing.com      *
 *   All rights reserved.                                                  *
 *                                                                         *
 *   Contributed originally by Mike Kinghan, imk@burroingroingjoing.com    *
 *                                                                         *
 *   Redistribution and use in source and binary forms, with or without    *
 *   modification, are permitted provided that the following conditions    *
 *   are met:                                                              *
 *                                                                         *
 *   Redistributions of source code must retain the above copyright        *
 *   notice, this list of conditions and the following disclaimer.         *
 *                                                                         *
 *   Redistributions in binary form must reproduce the above copyright     *
 *   notice, this list of conditions and the following disclaimer in the   *
 *   documentation and/or other materials provided with the distribution.  *
 *                                                                         *
 *   Neither the name of Symbian Software Ltd. nor the names of its        *
 *   contributors may be used to endorse or promote products derived from  *
 *   this software without specific prior written permission.              *
 *                                                                         *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS   *
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT     *
 *   LIMITED TO, THE IMPLIED WARRANTIES OF  MERCHANTABILITY AND FITNESS    *
 *   FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE        *
 *   COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,   *
 *   INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,  *
 *   BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS *
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 *   AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,*
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 *   DAMAGE.                                                               *
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 **************************************************************************/

#include "filesys.h"
#include <string>
#include <cassert>

struct io {

        static char const * const _stdin_name_; // = "[stdin]"


        static std::string read_filename();

        static FILE * open_file(std::string const & file, const char *mode);

        static void open(std::string const & fname);

        static void close(unsigned error);

        static void close_input();

        static void top();

        static std::string in_file_name() {
                return _in_filename_;
        }

        static std::ostream * output() {
                return _output_;
        }

        static std::istream * input() {
                return _input_;
        }

        static void set_spin_dir(char const *optarg);

        static void set_spin_prefix(char const *optarg);

        static std::string const & spin_dir() {
                return _spin_dir_;
        }

        static bool spin() {
                return !_spin_dir_.empty();
        }

private:

        static void replace_infile();

        static void backup_infile(const char *filename);

        static void backup_infile();

        static void delete_infile();


        static void open_outfile();

        static void open_output();

        static void make_spinfile();

        static void make_tempfile();

        static void make_backup_name(std::string const & filename);

        static std::string _in_filename_;
        static std::ostream * _output_;
        static std::istream * _input_;
        static std::filebuf _infile_;
        static fs::permissions _in_out_permissions_;
        static std::string _out_filename_;
        static std::string _bak_filename_;
        static std::filebuf _outfile_;
        static std::string _spin_dir_;
        static std::string _spin_prefix_;
};

#endif /* EOF*/