Program Listing for File IfcSpfStream.h

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/********************************************************************************
 *                                                                              *
 * This file is part of IfcOpenShell.                                           *
 *                                                                              *
 * IfcOpenShell is free software: you can redistribute it and/or modify         *
 * it under the terms of the Lesser GNU General Public License as published by  *
 * the Free Software Foundation, either version 3.0 of the License, or          *
 * (at your option) any later version.                                          *
 *                                                                              *
 * IfcOpenShell 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                 *
 * Lesser GNU General Public License for more details.                          *
 *                                                                              *
 * You should have received a copy of the Lesser GNU General Public License     *
 * along with this program. If not, see <http://www.gnu.org/licenses/>.         *
 *                                                                              *
 ********************************************************************************/

/*********************************************************************************
 *                                                                               *
 * Reads a file and provides functions to access its                             *
 * contents randomly and character by character                                  *
 *                                                                               *
 ********************************************************************************/

#ifndef IFCSPFSTREAM_H
#define IFCSPFSTREAM_H

#include <fstream>
#include <string>

#ifdef USE_MMAP
#include <boost/iostreams/device/mapped_file.hpp>
#endif

#include "ifc_parse_api.h"

namespace IfcParse {
    class IFC_PARSE_API IfcSpfStream {
    private:
#ifdef USE_MMAP
        boost::iostreams::mapped_file_source mfs;
#endif
        FILE* stream;
        const char* buffer;
        unsigned int ptr;
        unsigned int len;
    public:
        bool valid;
        bool eof;
        unsigned int size;
#ifdef USE_MMAP
        IfcSpfStream(const std::string& fn, bool mmap=false);
#else
        IfcSpfStream(const std::string& fn);
#endif
        IfcSpfStream(std::istream& f, int len);
        IfcSpfStream(void* data, int len);
        ~IfcSpfStream();
        char Peek();
        char Read(unsigned int offset);
        void Inc();
        void Close();
        void Seek(unsigned int offset);
        unsigned int Tell();

        bool is_eof_at(unsigned int);
        void increment_at(unsigned int&);
        char peek_at(unsigned int);
    };
}

#endif