/******************************************************************************
**  libDXFrw - Library to read/write DXF files (ascii & binary)              **
**                                                                           **
**  Copyright (C) 2011-2015 José F. Soriano, rallazz@gmail.com               **
**                                                                           **
**  This library is free software, licensed 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.  **
**  You should have received a copy of the GNU General Public License        **
**  along with this program.  If not, see <http://www.gnu.org/licenses/>.    **
******************************************************************************/

#ifndef DXFREADER_H
#define DXFREADER_H

#include "drw_textcodec.h"

class dxfReader {
public:
    enum TYPE {
        STRING,
        INT32,
        INT64,
        DOUBLE,
        BOOL,
        INVALID
    };
    enum TYPE type;
public:
    dxfReader(std::istream *stream){
        filestr = stream;
        type = INVALID;
    }
    virtual ~dxfReader(){}
    bool readRec(int *code);

    std::string getString() {return strData;}
    int getHandleString();//Convert hex string to int
    std::string toUtf8String(std::string t) {return decoder.toUtf8(t);}
    std::string getUtf8String() {return decoder.toUtf8(strData);}
    double getDouble() {return doubleData;}
    int getInt32() {return intData;}
    unsigned long long int getInt64() {return int64;}
    bool getBool() { return (intData==0) ? false : true;}
    int getVersion(){return decoder.getVersion();}
    void setVersion(std::string *v, bool dxfFormat){decoder.setVersion(v, dxfFormat);}
    void setCodePage(std::string *c){decoder.setCodePage(c, true);}
    std::string getCodePage(){ return decoder.getCodePage();}

protected:
    virtual bool readCode(int *code) = 0; //return true if sucesful (not EOF)
    virtual bool readString(std::string *text) = 0;
    virtual bool readString() = 0;
    virtual bool readInt16() = 0;
    virtual bool readInt32() = 0;
    virtual bool readInt64() = 0;
    virtual bool readDouble() = 0;
    virtual bool readBool() = 0;

protected:
    std::istream *filestr;
    std::string strData;
    double doubleData;
    signed int intData; //32 bits integer
    unsigned long long int int64; //64 bits integer
    bool skip; //set to true for ascii dxf, false for binary
private:
    DRW_TextCodec decoder;
};

class dxfReaderBinary : public dxfReader {
public:
    dxfReaderBinary(std::istream *stream):dxfReader(stream){skip = false; }
    virtual ~dxfReaderBinary() {}
    virtual bool readCode(int *code);
    virtual bool readString(std::string *text);
    virtual bool readString();
    virtual bool readInt16();
    virtual bool readInt32();
    virtual bool readInt64();
    virtual bool readDouble();
    virtual bool readBool();
};

class dxfReaderAscii : public dxfReader {
public:
    dxfReaderAscii(std::istream *stream):dxfReader(stream){skip = true; }
    virtual ~dxfReaderAscii(){}
    virtual bool readCode(int *code);
    virtual bool readString(std::string *text);
    virtual bool readString();
    virtual bool readInt16();
    virtual bool readDouble();
    virtual bool readInt32();
    virtual bool readInt64();
    virtual bool readBool();
};

#endif // DXFREADER_H