file.cpp

/* -*- mode:c++; tab-width:4; c-basic-offset:4; indent-tabs-mode:t; -*- */
/*
 * libopenraw - file.cpp
 *
 * Copyright (C) 2006-2018 Hubert Figuière
 *
 * This library is free software: you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library.  If not, see
 * <http://www.gnu.org/licenses/>.
 */
 
#include <fcntl.h>
#include <string>
 
#include "libopenraw/consts.h"
#include "libopenraw/io.h"
 
#include "trace.hpp"
#include "io/stream.hpp"
#include "file.hpp"
 
namespace OpenRaw {
    namespace IO {
 
        File::File(const char *filename)
            : OpenRaw::IO::Stream(filename),
                m_methods(::get_default_io_methods()),
                m_ioRef(NULL)
        {
        }
 
        File::~File()
        {
            if (m_ioRef) {
                close();
            }
        }
 
        File::Error File::open()
        {
            if (m_ioRef) {
                LOGDBG1("Already open\n");
                return OR_ERROR_ALREADY_OPEN;
            }
            m_ioRef = ::raw_open(m_methods, get_path().c_str(), O_RDONLY);
            if (m_ioRef == NULL) {
                return OR_ERROR_CANT_OPEN;
            }
            return OR_ERROR_NONE;
        }
 
        int File::close()
        {
            int result = ::raw_close(m_ioRef);
            m_ioRef = NULL;
            return result;
        }
 
        int File::seek(off_t offset, int whence)
        {
            return ::raw_seek(m_ioRef, offset, whence);
        }
 
        int File::read(void *buf, size_t count)
        {
            return ::raw_read(m_ioRef, buf, count);
        }
 
        off_t File::filesize()
        {
            return ::raw_filesize(m_ioRef);
        }
 
    }
}