ebml/EbmlUnicodeString.h

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/****************************************************************************
** libebml : parse EBML files, see http://embl.sourceforge.net/
**
** <file/class description>
**
** Copyright (C) 2002-2010 Steve Lhomme.  All rights reserved.
**
** This file is part of libebml.
**
** 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 2.1 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, write to the Free Software
** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
**
** See http://www.matroska.org/license/lgpl/ for LGPL licensing information.
**
** Contact license@matroska.org if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/

#ifndef LIBEBML_UNICODE_STRING_H
#define LIBEBML_UNICODE_STRING_H

#include <string>

#include "EbmlTypes.h"
#include "EbmlElement.h"

START_LIBEBML_NAMESPACE

class EBML_DLL_API UTFstring {
public:
        typedef wchar_t value_type;

        UTFstring();
        UTFstring(const wchar_t *); // should be NULL terminated
        UTFstring(const UTFstring &);
        
        virtual ~UTFstring();
        bool operator==(const UTFstring&) const;
        inline bool operator!=(const UTFstring &cmp) const
        {
                return !(*this == cmp);
        }
        UTFstring & operator=(const UTFstring &);
        UTFstring & operator=(const wchar_t *);
        UTFstring & operator=(wchar_t);

        size_t length() const {return _Length;}

        operator const wchar_t*() const {return _Data;}
        const wchar_t* c_str() const {return _Data;}

        const std::string & GetUTF8() const {return UTF8string;}
        void SetUTF8(const std::string &);

#if defined(EBML_STRICT_API)
    private:
#else
    protected:
#endif
        size_t _Length; 
        wchar_t* _Data; 
        std::string UTF8string;
        static bool wcscmp_internal(const wchar_t *str1, const wchar_t *str2);
        void UpdateFromUTF8();
        void UpdateFromUCS2();
};


class EBML_DLL_API EbmlUnicodeString : public EbmlElement {
        public:
                EbmlUnicodeString();
                EbmlUnicodeString(const UTFstring & DefaultValue);
                EbmlUnicodeString(const EbmlUnicodeString & ElementToClone);
        
                virtual ~EbmlUnicodeString() {}
        
                virtual bool ValidateSize() const {return IsFiniteSize();} // any size is possible
                filepos_t RenderData(IOCallback & output, bool bForceRender, bool bWithDefault = false);
                filepos_t ReadData(IOCallback & input, ScopeMode ReadFully = SCOPE_ALL_DATA);
                filepos_t UpdateSize(bool bWithDefault = false, bool bForceRender = false);
        
                EbmlUnicodeString & operator=(const UTFstring &); 
                operator const UTFstring &() const {return Value;}
        
                void SetDefaultValue(UTFstring &);
    
                const UTFstring & DefaultVal() const;

                bool IsDefaultValue() const {
                        return (DefaultISset() && Value == DefaultValue);
                }

#if defined(EBML_STRICT_API)
    private:
#else
    protected:
#endif
                UTFstring Value; 
                UTFstring DefaultValue;
};

END_LIBEBML_NAMESPACE

#endif // LIBEBML_UNICODE_STRING_H

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