binaryfilereader.h

Go to the documentation of this file.

// -*- C++ -*-
//
// This file is part of libgvectors.
// libgvectors is a C++ library intended for visualizing mathematical vectors.
// Copyright (C) 2007  Rafael Ostertag
//
// 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 2
// 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, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
// USA.
//
// $Id: binaryfilereader_8h-source.html,v 1.1 2007-09-08 19:02:23 rafi Exp $
//
// File:   binaryfilereader.h
// Author: Rafael Ostertag
//
// Created on August 18, 2007, 12:04 AM
//

#ifndef _BINARYFILEREADER_H
#define _BINARYFILEREADER_H

#include "gvectors-config.h"

#ifdef HAVE_GFILEIO

#include <stdlib.h>
#include <string.h>
#include <string>
#include <gfileio.h>

#include <gvectortypes.h>
#include <gvexceptions.h>
#include <vectorstore.h>
#include <filereader.h>
#include <visualvector.h>
#include <color.h>

namespace GVectors {
    template<class Fct> class BinaryReader : public FileReader<Fct> {
    private:
        GFileIO::GFile file;
        
    public:
        BinaryReader(std::string filename, VectorStore& vs, Fct callback) : FileReader<Fct>(vs, callback), file(filename) {
            
        }
        BinaryReader(const BinaryReader& br) : FileReader<Fct>(br), file(br.file) {
            
        }
        
        virtual ~BinaryReader() {
            file.close();
        }
        
        void read(){
            file.open();
            
            // Read header
            BFileHeaderV_0_1 header;
            bool ret_val = file.read<BFileHeaderV_0_1>(header);
            
            if (header.version != BWVER_0_1)
                throw GVEWrongFileVersion();
            
            while (ret_val) {
                // Read the length of the tag
                size_t taglen;
                ret_val = file.read<size_t>(taglen);
                if (!ret_val)
                    break;
                
                // Read the tag
                char* tag = (char*)malloc(taglen + 1);
                ret_val = file.read<char>(*tag, taglen);
                if (!ret_val) {
                    free(tag);
                }
                tag[taglen] = '\0';

                // Read the vector
                BFileVectorV_0_1 vector;
                ret_val = file.read<BFileVectorV_0_1>(vector);
                
                // Create the visual vector
                VisualVector vvector(tag, vector.x, vector.y, vector.z);
                Color color(vector.r, vector.g, vector.b);
                vvector.set_color(color);
                // Put the visual vector into the vector store
                FileReader<Fct>::put(vector.level, vvector);
                
                free(tag);
            }
        }
    };
}

#endif /* HAVE_GFILEIO */

#endif  /* _BINARYFILEREADER_H */

---