/*

    Copyright 2005-2007 Adobe Systems Incorporated

   

    Use, modification and distribution are subject to the Boost Software License,

    Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at

    http://www.boost.org/LICENSE_1_0.txt).



    See http://opensource.adobe.com/gil for most recent version including documentation.

*/

/*************************************************************************************************/



#ifndef GIL_IO_ERROR_H

#define GIL_IO_ERROR_H



/// \file

/// \brief  Handle input-output errors

/// \author Lubomir Bourdev and Hailin Jin \n

///         Adobe Systems Incorporated

/// \date   2005-2007 \n  Last updated on May 30, 2006



#include <ios>

#include "../../gil_config.hpp"

#include <boost/shared_ptr.hpp>



namespace boost { namespace gil {



inline void io_error(const char* descr) { throw std::ios_base::failure(descr); }

inline void io_error_if(bool expr, const char* descr="") { if (expr) io_error(descr); }



namespace detail {

    class file_mgr {

    protected:

        shared_ptr<FILE> _fp;



        struct null_deleter { void operator()(void const*) const {} };

        file_mgr(FILE* file) : _fp(file, null_deleter()) {}



        file_mgr(const char* filename, const char* flags) {

            FILE* fp;

            io_error_if((fp=fopen(filename,flags))==NULL, "file_mgr: failed to open file");

            _fp=shared_ptr<FILE>(fp,fclose);

        }



    public:

        FILE* get() { return _fp.get(); }

    };

}



} }  // namespace boost::gil



#endif

