/*
 * Copyright (C) 2007-2013 Xagasoft, All rights reserved.
 *
 * This file is part of the libbu++ library and is released under the
 * terms of the license contained in the file LICENSE.
 */

#ifndef BU_XML_READER_H
#define BU_XML_READER_H

#include "bu/string.h"
#include "bu/exceptionbase.h"

namespace Bu
{
    class Stream;

    subExceptionDecl( XmlException );

    class XmlReader
    {
    public:
        XmlReader( Stream &rInput );
        virtual ~XmlReader();

    private:
        Stream &rInput;
        int iCurToken;
        int iNextToken;
        Bu::String sBuf;
        Bu::String sStr;
        bool bIgnoreWS;
        typedef struct StreamPos
        {
            StreamPos() : iLine( 1 ), iChar( 1 ) { }
            int iLine;
            int iChar;
        } StreamPos;
        StreamPos spCurToken;
        StreamPos spNextToken;


        enum
        {
            tokXmlDeclHead  =   0x100,
            tokXmlDeclEnd,
            tokWS,
            tokIdent,
            tokString
        };

        void fillBuffer();
        void cleanupBuffer( int iUsed );
        int nextToken();

        void stDocument();
        void stProlog();
        void stXmlDecl();

        void error( const char *sMessage );
    };
};

#endif