tinyxml.h

/*
www.sourceforge.net/projects/tinyxml
Original code (2.0 and earlier )copyright (c) 2000-2002 Lee Thomason (www.grinninglizard.com)

This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any
damages arising from the use of this software.

Permission is granted to anyone to use this software for any
purpose, including commercial applications, and to alter it and
redistribute it freely, subject to the following restrictions:

1. The origin of this software must not be misrepresented; you must
not claim that you wrote the original software. If you use this
software in a product, an acknowledgment in the product documentation
would be appreciated but is not required.

2. Altered source versions must be plainly marked as such, and
must not be misrepresented as being the original software.

3. This notice may not be removed or altered from any source
distribution.

 F.Gaede, DESY : added #define TIXML_USE_STL  for use with gear
               : put everything in namespace gear

   $Id$
*/

#ifndef TIXML_USE_STL
#define TIXML_USE_STL
#endif

#ifndef TINYXML_INCLUDED
#define TINYXML_INCLUDED

#ifdef _MSC_VER
#pragma warning( disable : 4530 )
#pragma warning( disable : 4786 )
#endif

#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>

// Help out windows:
#if defined( _DEBUG ) && !defined( DEBUG )
#define DEBUG
#endif

#if defined( DEBUG ) && defined( _MSC_VER )
#include <windows.h>
#define TIXML_LOG OutputDebugString
#else
#define TIXML_LOG printf
#endif

#ifdef TIXML_USE_STL
        #include <string>
        #include <iostream>
        #define TIXML_STRING    std::string
        #define TIXML_ISTREAM   std::istream
        #define TIXML_OSTREAM   std::ostream
#else
        #include "tinystr.h"
        #define TIXML_STRING    TiXmlString
        #define TIXML_OSTREAM   TiXmlOutStream
#endif


//fg: put it namespace gear
namespace gear {

class TiXmlDocument;
class TiXmlElement;
class TiXmlComment;
class TiXmlUnknown;
class TiXmlAttribute;
class TiXmlText;
class TiXmlDeclaration;
class TiXmlParsingData;

const int TIXML_MAJOR_VERSION = 2;
const int TIXML_MINOR_VERSION = 3;
const int TIXML_PATCH_VERSION = 4;

/*      Internal structure for tracking location of items 
        in the XML file.
*/
struct TiXmlCursor
{
        TiXmlCursor()           { Clear(); }
        void Clear()            { row = col = -1; }

        int row{};      // 0 based.
        int col{};      // 0 based.
};


// Only used by Attribute::Query functions
enum 
{ 
        TIXML_SUCCESS,
        TIXML_NO_ATTRIBUTE,
        TIXML_WRONG_TYPE
};


// Used by the parsing routines.
enum TiXmlEncoding
{
        TIXML_ENCODING_UNKNOWN,
        TIXML_ENCODING_UTF8,
        TIXML_ENCODING_LEGACY
};

const TiXmlEncoding TIXML_DEFAULT_ENCODING = TIXML_ENCODING_UNKNOWN;

class TiXmlBase
{
        friend class TiXmlNode;
        friend class TiXmlElement;
        friend class TiXmlDocument;

public:
        TiXmlBase()     :       userData(0) {}
        virtual ~TiXmlBase()                                    {}

        virtual void Print( FILE* cfile, int depth ) const = 0;

        static void SetCondenseWhiteSpace( bool condense )              { condenseWhiteSpace = condense; }

        static bool IsWhiteSpaceCondensed()                                             { return condenseWhiteSpace; }

        int Row() const                 { return location.row + 1; }
        int Column() const              { return location.col + 1; }    

        void  SetUserData( void* user )                 { userData = user; }
        void* GetUserData()                                             { return userData; }

        // Table that returs, for a given lead byte, the total number of bytes
        // in the UTF-8 sequence.
        static const int utf8ByteTable[256];

        virtual const char* Parse(      const char* p, 
                                                                TiXmlParsingData* data, 
                                                                TiXmlEncoding encoding /*= TIXML_ENCODING_UNKNOWN */ ) = 0;

        enum
        {
                TIXML_NO_ERROR = 0,
                TIXML_ERROR,
                TIXML_ERROR_OPENING_FILE,
                TIXML_ERROR_OUT_OF_MEMORY,
                TIXML_ERROR_PARSING_ELEMENT,
                TIXML_ERROR_FAILED_TO_READ_ELEMENT_NAME,
                TIXML_ERROR_READING_ELEMENT_VALUE,
                TIXML_ERROR_READING_ATTRIBUTES,
                TIXML_ERROR_PARSING_EMPTY,
                TIXML_ERROR_READING_END_TAG,
                TIXML_ERROR_PARSING_UNKNOWN,
                TIXML_ERROR_PARSING_COMMENT,
                TIXML_ERROR_PARSING_DECLARATION,
                TIXML_ERROR_DOCUMENT_EMPTY,
                TIXML_ERROR_EMBEDDED_NULL,

                TIXML_ERROR_STRING_COUNT
        };

protected:

        // See STL_STRING_BUG
        // Utility class to overcome a bug.
        class StringToBuffer
        {
          public:
                StringToBuffer(const StringToBuffer&) = default ;
                StringToBuffer& operator=(const StringToBuffer&) = default ;
                StringToBuffer( const TIXML_STRING& str );
                ~StringToBuffer();
                char* buffer{};
        };

        static const char*      SkipWhiteSpace( const char*, TiXmlEncoding encoding );
        inline static bool      IsWhiteSpace( char c )          
        { 
                return ( isspace( (unsigned char) c ) || c == '\n' || c == '\r' ); 
        }

        virtual void StreamOut (TIXML_OSTREAM *) const = 0;

        #ifdef TIXML_USE_STL
            static bool StreamWhiteSpace( TIXML_ISTREAM * in, TIXML_STRING * tag );
            static bool StreamTo( TIXML_ISTREAM * in, int character, TIXML_STRING * tag );
        #endif

        /*      Reads an XML name into the string provided. Returns
                a pointer just past the last character of the name,
                or 0 if the function has an error.
        */
        static const char* ReadName( const char* p, TIXML_STRING* name, TiXmlEncoding encoding );

        /*      Reads text. Returns a pointer past the given end tag.
                Wickedly complex options, but it keeps the (sensitive) code in one place.
        */
        static const char* ReadText(    const char* in,                         // where to start
                                                                        TIXML_STRING* text,                     // the string read
                                                                        bool ignoreWhiteSpace,          // whether to keep the white space
                                                                        const char* endTag,                     // what ends this text
                                                                        bool ignoreCase,                        // whether to ignore case in the end tag
                                                                        TiXmlEncoding encoding );       // the current encoding

        // If an entity has been found, transform it into a character.
        static const char* GetEntity( const char* in, char* value, int* length, TiXmlEncoding encoding );

        // Get a character, while interpreting entities.
        // The length can be from 0 to 4 bytes.
        inline static const char* GetChar( const char* p, char* _value, int* length, TiXmlEncoding encoding )
        {
                assert( p );
                if ( encoding == TIXML_ENCODING_UTF8 )
                {
                        *length = utf8ByteTable[ *((unsigned char*)p) ];
                        assert( *length >= 0 && *length < 5 );
                }
                else
                {
                        *length = 1;
                }

                if ( *length == 1 )
                {
                        if ( *p == '&' )
                                return GetEntity( p, _value, length, encoding );
                        *_value = *p;
                        return p+1;
                }
                else if ( *length )
                {
                        strncpy( _value, p, *length );
                        return p + (*length);
                }
                else
                {
                        // Not valid text.
                        return 0;
                }
        }

        // Puts a string to a stream, expanding entities as it goes.
        // Note this should not contian the '<', '>', etc, or they will be transformed into entities!
        static void PutString( const TIXML_STRING& str, TIXML_OSTREAM* out );

        static void PutString( const TIXML_STRING& str, TIXML_STRING* out );

        // Return true if the next characters in the stream are any of the endTag sequences.
        // Ignore case only works for english, and should only be relied on when comparing
        // to Engilish words: StringEqual( p, "version", true ) is fine.
        static bool StringEqual(        const char* p,
                                                                const char* endTag,
                                                                bool ignoreCase,
                                                                TiXmlEncoding encoding );

        static const char* errorString[ TIXML_ERROR_STRING_COUNT ];

        TiXmlCursor location{};

        void*                   userData;
        
        // None of these methods are reliable for any language except English.
        // Good for approximation, not great for accuracy.
        static int IsAlpha( unsigned char anyByte, TiXmlEncoding encoding );
        static int IsAlphaNum( unsigned char anyByte, TiXmlEncoding encoding );
        inline static int ToLower( int v, TiXmlEncoding encoding )
        {
                if ( encoding == TIXML_ENCODING_UTF8 )
                {
                        if ( v < 128 ) return tolower( v );
                        return v;
                }
                else
                {
                        return tolower( v );
                }
        }
        static void ConvertUTF32ToUTF8( unsigned long input, char* output, int* length );

private:
        TiXmlBase( const TiXmlBase& );                          // not implemented.
        void operator=( const TiXmlBase& base );        // not allowed.

        struct Entity
        {
                const char*     str;
                unsigned int    strLength;
                char                chr;
        };
        enum
        {
                NUM_ENTITY = 5,
                MAX_ENTITY_LENGTH = 6

        };
        static Entity entity[ NUM_ENTITY ];
        static bool condenseWhiteSpace;
};


class TiXmlNode : public TiXmlBase
{
        friend class TiXmlDocument;
        friend class TiXmlElement;

public:
        #ifdef TIXML_USE_STL    

            friend std::istream& operator >> (std::istream& in, TiXmlNode& base);

            friend std::ostream& operator<< (std::ostream& out, const TiXmlNode& base);

                friend std::string& operator<< (std::string& out, const TiXmlNode& base );

        #else
            // Used internally, not part of the public API.
            friend TIXML_OSTREAM& operator<< (TIXML_OSTREAM& out, const TiXmlNode& base);
        #endif

        enum NodeType
        {
                DOCUMENT,
                ELEMENT,
                COMMENT,
                UNKNOWN,
                TEXT,
                DECLARATION,
                TYPECOUNT
        };

        virtual ~TiXmlNode();

        const char * Value() const { return value.c_str (); }

        void SetValue(const char * _value) { value = _value;}

    #ifdef TIXML_USE_STL
        void SetValue( const std::string& _value )    
        {         
                StringToBuffer buf( _value );
                SetValue( buf.buffer ? buf.buffer : "" );       
        }       
        #endif

        void Clear();

        TiXmlNode* Parent()                                                     { return parent; }
        const TiXmlNode* Parent() const                         { return parent; }

        const TiXmlNode* FirstChild()   const   { return firstChild; }          
        TiXmlNode* FirstChild()                                 { return firstChild; }
        const TiXmlNode* FirstChild( const char * value ) const;                        
        TiXmlNode* FirstChild( const char * value );                                            

        const TiXmlNode* LastChild() const      { return lastChild; }           
        TiXmlNode* LastChild()  { return lastChild; }
        const TiXmlNode* LastChild( const char * value ) const;                 
        TiXmlNode* LastChild( const char * value );     

    #ifdef TIXML_USE_STL
        const TiXmlNode* FirstChild( const std::string& _value ) const  {       return FirstChild (_value.c_str ());    }       
        TiXmlNode* FirstChild( const std::string& _value )                              {       return FirstChild (_value.c_str ());    }       
        const TiXmlNode* LastChild( const std::string& _value ) const   {       return LastChild (_value.c_str ());     }       
        TiXmlNode* LastChild( const std::string& _value )                               {       return LastChild (_value.c_str ());     }       
        #endif

        const TiXmlNode* IterateChildren( const TiXmlNode* previous ) const;
        TiXmlNode* IterateChildren( TiXmlNode* previous );

        const TiXmlNode* IterateChildren( const char * value, const TiXmlNode* previous ) const;
        TiXmlNode* IterateChildren( const char * value, TiXmlNode* previous );

    #ifdef TIXML_USE_STL
        const TiXmlNode* IterateChildren( const std::string& _value, const TiXmlNode* previous ) const  {       return IterateChildren (_value.c_str (), previous);     }       
        TiXmlNode* IterateChildren( const std::string& _value, TiXmlNode* previous ) {  return IterateChildren (_value.c_str (), previous);     }       
        #endif

        TiXmlNode* InsertEndChild( const TiXmlNode& addThis );


        TiXmlNode* LinkEndChild( TiXmlNode* addThis );

        TiXmlNode* InsertBeforeChild( TiXmlNode* beforeThis, const TiXmlNode& addThis );

        TiXmlNode* InsertAfterChild(  TiXmlNode* afterThis, const TiXmlNode& addThis );

        TiXmlNode* ReplaceChild( TiXmlNode* replaceThis, const TiXmlNode& withThis );

        bool RemoveChild( TiXmlNode* removeThis );

        const TiXmlNode* PreviousSibling() const                        { return prev; }
        TiXmlNode* PreviousSibling()                                            { return prev; }

        const TiXmlNode* PreviousSibling( const char * ) const;
        TiXmlNode* PreviousSibling( const char * );

    #ifdef TIXML_USE_STL
        const TiXmlNode* PreviousSibling( const std::string& _value ) const     {       return PreviousSibling (_value.c_str ());       }       
        TiXmlNode* PreviousSibling( const std::string& _value )                         {       return PreviousSibling (_value.c_str ());       }       
        const TiXmlNode* NextSibling( const std::string& _value) const          {       return NextSibling (_value.c_str ());   }       
        TiXmlNode* NextSibling( const std::string& _value)                                      {       return NextSibling (_value.c_str ());   }       
        #endif

        const TiXmlNode* NextSibling() const                            { return next; }
        TiXmlNode* NextSibling()                                                        { return next; }

        const TiXmlNode* NextSibling( const char * ) const;
        TiXmlNode* NextSibling( const char * );

        const TiXmlElement* NextSiblingElement() const;
        TiXmlElement* NextSiblingElement();

        const TiXmlElement* NextSiblingElement( const char * ) const;
        TiXmlElement* NextSiblingElement( const char * );

    #ifdef TIXML_USE_STL
        const TiXmlElement* NextSiblingElement( const std::string& _value) const        {       return NextSiblingElement (_value.c_str ());    }       
        TiXmlElement* NextSiblingElement( const std::string& _value)                            {       return NextSiblingElement (_value.c_str ());    }       
        #endif

        const TiXmlElement* FirstChildElement() const;
        TiXmlElement* FirstChildElement();

        const TiXmlElement* FirstChildElement( const char * value ) const;
        TiXmlElement* FirstChildElement( const char * value );

    #ifdef TIXML_USE_STL
        const TiXmlElement* FirstChildElement( const std::string& _value ) const        {       return FirstChildElement (_value.c_str ());     }       
        TiXmlElement* FirstChildElement( const std::string& _value )                            {       return FirstChildElement (_value.c_str ());     }       
        #endif

        virtual int Type() const        { return type; }

        const TiXmlDocument* GetDocument() const;
        TiXmlDocument* GetDocument();

        bool NoChildren() const                                         { return !firstChild; }

        const TiXmlDocument* ToDocument()       const           { return (  type == DOCUMENT ) ? (const TiXmlDocument*) this : 0; } 
        const TiXmlElement*  ToElement() const                  { return (  type == ELEMENT  ) ? (const TiXmlElement*)  this : 0; } 
        const TiXmlComment*  ToComment() const                  { return (  type == COMMENT  ) ? (const TiXmlComment*)  this : 0; } 
        const TiXmlUnknown*  ToUnknown() const                  { return (  type == UNKNOWN  ) ? (const TiXmlUnknown*)  this : 0; } 
        const TiXmlText*           ToText()    const            { return (  type == TEXT     ) ? (const TiXmlText*)     this : 0; } 
        const TiXmlDeclaration* ToDeclaration() const   { return (  type == DECLARATION ) ? (const TiXmlDeclaration*) this : 0; } 

        TiXmlDocument* ToDocument()                     { return (  type == DOCUMENT ) ? (TiXmlDocument*) this : 0; } 
        TiXmlElement*  ToElement()                      { return (  type == ELEMENT  ) ? (TiXmlElement*)  this : 0; } 
        TiXmlComment*  ToComment()                      { return (  type == COMMENT  ) ? (TiXmlComment*)  this : 0; } 
        TiXmlUnknown*  ToUnknown()                      { return (  type == UNKNOWN  ) ? (TiXmlUnknown*)  this : 0; } 
        TiXmlText*         ToText()                     { return (  type == TEXT     ) ? (TiXmlText*)     this : 0; } 
        TiXmlDeclaration* ToDeclaration()       { return (  type == DECLARATION ) ? (TiXmlDeclaration*) this : 0; } 

        virtual TiXmlNode* Clone() const = 0;

protected:
        TiXmlNode( NodeType _type );

        // Copy to the allocated object. Shared functionality between Clone, Copy constructor,
        // and the assignment operator.
        void CopyTo( TiXmlNode* target ) const;

        #ifdef TIXML_USE_STL
            // The real work of the input operator.
            virtual void StreamIn( TIXML_ISTREAM* in, TIXML_STRING* tag ) = 0;
        #endif

        // Figure out what is at *p, and parse it. Returns null if it is not an xml node.
        TiXmlNode* Identify( const char* start, TiXmlEncoding encoding );

        // Internal Value function returning a TIXML_STRING
        const TIXML_STRING& SValue() const      { return value ; }

        TiXmlNode*              parent{};
        NodeType                type{};

        TiXmlNode*              firstChild{};
        TiXmlNode*              lastChild{};

        TIXML_STRING    value{};

        TiXmlNode*              prev{};
        TiXmlNode*              next{};

private:
        TiXmlNode( const TiXmlNode& );                          // not implemented.
        void operator=( const TiXmlNode& base );        // not allowed.
};


class TiXmlAttribute : public TiXmlBase
{
        friend class TiXmlAttributeSet;

public:
        TiXmlAttribute() : TiXmlBase()
        {
                document = 0;
                prev = next = 0;
        }

        #ifdef TIXML_USE_STL
        TiXmlAttribute( const std::string& _name, const std::string& _value )
        {
                name = _name;
                value = _value;
                document = 0;
                prev = next = 0;
        }
        #endif

        TiXmlAttribute( const char * _name, const char * _value )
        {
                name = _name;
                value = _value;
                document = 0;
                prev = next = 0;
        }

        const char*             Name()  const           { return name.c_str (); }               
        const char*             Value() const           { return value.c_str (); }              
        int       IntValue() const;                                                                     
        double  DoubleValue() const;                                                            

        int QueryIntValue( int* value ) const;
        int QueryDoubleValue( double* value ) const;

        void SetName( const char* _name )       { name = _name; }                               
        void SetValue( const char* _value )     { value = _value; }                             

        void SetIntValue( int value );                                                                          
        void SetDoubleValue( double value );                                                            

    #ifdef TIXML_USE_STL
        void SetName( const std::string& _name )        
        {       
                StringToBuffer buf( _name );
                SetName ( buf.buffer ? buf.buffer : "error" );  
        }
        void SetValue( const std::string& _value )      
        {       
                StringToBuffer buf( _value );
                SetValue( buf.buffer ? buf.buffer : "error" );  
        }
        #endif

        const TiXmlAttribute* Next() const;
        TiXmlAttribute* Next();
        const TiXmlAttribute* Previous() const;
        TiXmlAttribute* Previous();

        bool operator==( const TiXmlAttribute& rhs ) const { return rhs.name == name; }
        bool operator<( const TiXmlAttribute& rhs )      const { return name < rhs.name; }
        bool operator>( const TiXmlAttribute& rhs )  const { return name > rhs.name; }

        /*      Attribute parsing starts: first letter of the name
                                                 returns: the next char after the value end quote
        */
        virtual const char* Parse( const char* p, TiXmlParsingData* data, TiXmlEncoding encoding );

        // Prints this Attribute to a FILE stream.
        virtual void Print( FILE* cfile, int depth ) const;

        virtual void StreamOut( TIXML_OSTREAM * out ) const;
        // [internal use]
        // Set the document pointer so the attribute can report errors.
        void SetDocument( TiXmlDocument* doc )  { document = doc; }

private:
        TiXmlAttribute( const TiXmlAttribute& );                                // not implemented.
        void operator=( const TiXmlAttribute& base );   // not allowed.

        TiXmlDocument*  document{};     // A pointer back to a document, for error reporting.
        TIXML_STRING name{};
        TIXML_STRING value{};
        TiXmlAttribute* prev{};
        TiXmlAttribute* next{};
};


/*      A class used to manage a group of attributes.
        It is only used internally, both by the ELEMENT and the DECLARATION.
        
        The set can be changed transparent to the Element and Declaration
        classes that use it, but NOT transparent to the Attribute
        which has to implement a next() and previous() method. Which makes
        it a bit problematic and prevents the use of STL.

        This version is implemented with circular lists because:
                - I like circular lists
                - it demonstrates some independence from the (typical) doubly linked list.
*/
class TiXmlAttributeSet
{
public:
        TiXmlAttributeSet();
        ~TiXmlAttributeSet();

        void Add( TiXmlAttribute* attribute );
        void Remove( TiXmlAttribute* attribute );

        const TiXmlAttribute* First()   const   { return ( sentinel.next == &sentinel ) ? 0 : sentinel.next; }
        TiXmlAttribute* First()                                 { return ( sentinel.next == &sentinel ) ? 0 : sentinel.next; }
        const TiXmlAttribute* Last() const              { return ( sentinel.prev == &sentinel ) ? 0 : sentinel.prev; }
        TiXmlAttribute* Last()                                  { return ( sentinel.prev == &sentinel ) ? 0 : sentinel.prev; }

        const TiXmlAttribute*   Find( const char * name ) const;
        TiXmlAttribute* Find( const char * name );

private:
        //*ME:  Because of hidden/disabled copy-construktor in TiXmlAttribute (sentinel-element),
        //*ME:  this class must be also use a hidden/disabled copy-constructor !!!
        TiXmlAttributeSet( const TiXmlAttributeSet& );  // not allowed
        void operator=( const TiXmlAttributeSet& );     // not allowed (as TiXmlAttribute)

        TiXmlAttribute sentinel{};
};


class TiXmlElement : public TiXmlNode
{
public:
        TiXmlElement (const char * in_value);

        #ifdef TIXML_USE_STL
        TiXmlElement( const std::string& _value );
        #endif

        TiXmlElement( const TiXmlElement& );

        TiXmlElement& operator=( const TiXmlElement& base );

        virtual ~TiXmlElement();

        const char* Attribute( const char* name ) const;

        const char* Attribute( const char* name, int* i ) const;

        const char* Attribute( const char* name, double* d ) const;

        int QueryIntAttribute( const char* name, int* value ) const;
        int QueryDoubleAttribute( const char* name, double* value ) const;
        int QueryDoubleAttribute( const char* name, float* val ) const {
                double d;
                int result = QueryDoubleAttribute( name, &d );
                *val = (float)d;
                return result;
        }

        void SetAttribute( const char* name, const char * value );

    #ifdef TIXML_USE_STL
        const char* Attribute( const std::string& name ) const                          { return Attribute( name.c_str() ); }
        const char* Attribute( const std::string& name, int* i ) const          { return Attribute( name.c_str(), i ); }
        const char* Attribute( const std::string& name, double* d ) const       { return Attribute( name.c_str(), d ); }
        int QueryIntAttribute( const std::string& name, int* val ) const        { return QueryIntAttribute( name.c_str(), val ); }
        int QueryDoubleAttribute( const std::string& name, double* val ) const { return QueryDoubleAttribute( name.c_str(), val ); }

        void SetAttribute( const std::string& name, const std::string& _value ) 
        {       
                StringToBuffer n( name );
                StringToBuffer v( _value );
                if ( n.buffer && v.buffer )
                        SetAttribute (n.buffer, v.buffer );     
        }       
        void SetAttribute( const std::string& name, int _value )        
        {       
                StringToBuffer n( name );
                if ( n.buffer )
                        SetAttribute (n.buffer, _value);        
        }       
        #endif

        void SetAttribute( const char * name, int value );

        void SetDoubleAttribute( const char * name, double value );

        void RemoveAttribute( const char * name );
    #ifdef TIXML_USE_STL
        void RemoveAttribute( const std::string& name ) {       RemoveAttribute (name.c_str ());        }       
        #endif

        const TiXmlAttribute* FirstAttribute() const    { return attributeSet.First(); }                
        TiXmlAttribute* FirstAttribute()                                { return attributeSet.First(); }
        const TiXmlAttribute* LastAttribute()   const   { return attributeSet.Last(); }         
        TiXmlAttribute* LastAttribute()                                 { return attributeSet.Last(); }

        virtual TiXmlNode* Clone() const;
        // Print the Element to a FILE stream.
        virtual void Print( FILE* cfile, int depth ) const;

        /*      Attribtue parsing starts: next char past '<'
                                                 returns: next char past '>'
        */
        virtual const char* Parse( const char* p, TiXmlParsingData* data, TiXmlEncoding encoding );

protected:

        void CopyTo( TiXmlElement* target ) const;
        void ClearThis();       // like clear, but initializes 'this' object as well

        // Used to be public [internal use]
        #ifdef TIXML_USE_STL
            virtual void StreamIn( TIXML_ISTREAM * in, TIXML_STRING * tag );
        #endif
        virtual void StreamOut( TIXML_OSTREAM * out ) const;

        /*      [internal use]
                Reads the "value" of the element -- another element, or text.
                This should terminate with the current end tag.
        */
        const char* ReadValue( const char* in, TiXmlParsingData* prevData, TiXmlEncoding encoding );

private:

        TiXmlAttributeSet attributeSet{};
};


class TiXmlComment : public TiXmlNode
{
public:
        TiXmlComment() : TiXmlNode( TiXmlNode::COMMENT ) {}
        TiXmlComment( const TiXmlComment& );
        TiXmlComment& operator=( const TiXmlComment& base );

        virtual ~TiXmlComment() {}

        virtual TiXmlNode* Clone() const;
        virtual void Print( FILE* cfile, int depth ) const;

        /*      Attribtue parsing starts: at the ! of the !--
                                                 returns: next char past '>'
        */
        virtual const char* Parse( const char* p, TiXmlParsingData* data, TiXmlEncoding encoding );

protected:
        void CopyTo( TiXmlComment* target ) const;

        // used to be public
        #ifdef TIXML_USE_STL
            virtual void StreamIn( TIXML_ISTREAM * in, TIXML_STRING * tag );
        #endif
        virtual void StreamOut( TIXML_OSTREAM * out ) const;

private:

};


class TiXmlText : public TiXmlNode
{
        friend class TiXmlElement;
public:
        TiXmlText (const char * initValue) : TiXmlNode (TiXmlNode::TEXT)
        {
                SetValue( initValue );
        }
        virtual ~TiXmlText() {}

        #ifdef TIXML_USE_STL
        TiXmlText( const std::string& initValue ) : TiXmlNode (TiXmlNode::TEXT)
        {
                SetValue( initValue );
        }
        #endif

        TiXmlText( const TiXmlText& copy ) : TiXmlNode( TiXmlNode::TEXT )       { copy.CopyTo( this ); }
        TiXmlText& operator=( const TiXmlText& base )                                   { base.CopyTo( this ); return *this ;}

        virtual void Print( FILE* cfile, int depth ) const;

        virtual const char* Parse( const char* p, TiXmlParsingData* data, TiXmlEncoding encoding );

protected :
        virtual TiXmlNode* Clone() const;
        void CopyTo( TiXmlText* target ) const;

        virtual void StreamOut ( TIXML_OSTREAM * out ) const;
        bool Blank() const;     // returns true if all white space and new lines
        // [internal use]
        #ifdef TIXML_USE_STL
            virtual void StreamIn( TIXML_ISTREAM * in, TIXML_STRING * tag );
        #endif

private:
};


class TiXmlDeclaration : public TiXmlNode
{
public:
        TiXmlDeclaration()   : TiXmlNode( TiXmlNode::DECLARATION ) {}

#ifdef TIXML_USE_STL
        TiXmlDeclaration(       const std::string& _version,
                                                const std::string& _encoding,
                                                const std::string& _standalone );
#endif

        TiXmlDeclaration(       const char* _version,
                                                const char* _encoding,
                                                const char* _standalone );

        TiXmlDeclaration( const TiXmlDeclaration& copy );
        TiXmlDeclaration& operator=( const TiXmlDeclaration& copy );

        virtual ~TiXmlDeclaration()     {}

        const char *Version() const                     { return version.c_str (); }
        const char *Encoding() const            { return encoding.c_str (); }
        const char *Standalone() const          { return standalone.c_str (); }

        virtual TiXmlNode* Clone() const;
        virtual void Print( FILE* cfile, int depth ) const;

        virtual const char* Parse( const char* p, TiXmlParsingData* data, TiXmlEncoding encoding );

protected:
        void CopyTo( TiXmlDeclaration* target ) const;
        // used to be public
        #ifdef TIXML_USE_STL
            virtual void StreamIn( TIXML_ISTREAM * in, TIXML_STRING * tag );
        #endif
        virtual void StreamOut ( TIXML_OSTREAM * out) const;

private:

        TIXML_STRING version{};
        TIXML_STRING encoding{};
        TIXML_STRING standalone{};
};


class TiXmlUnknown : public TiXmlNode
{
public:
        TiXmlUnknown() : TiXmlNode( TiXmlNode::UNKNOWN )        {}
        virtual ~TiXmlUnknown() {}

        TiXmlUnknown( const TiXmlUnknown& copy ) : TiXmlNode( TiXmlNode::UNKNOWN )              { copy.CopyTo( this ); }
        TiXmlUnknown& operator=( const TiXmlUnknown& copy )                                                                             { copy.CopyTo( this ); return *this ;}

        virtual TiXmlNode* Clone() const;
        virtual void Print( FILE* cfile, int depth ) const;

        virtual const char* Parse( const char* p, TiXmlParsingData* data, TiXmlEncoding encoding );

protected:
        void CopyTo( TiXmlUnknown* target ) const;

        #ifdef TIXML_USE_STL
            virtual void StreamIn( TIXML_ISTREAM * in, TIXML_STRING * tag );
        #endif
        virtual void StreamOut ( TIXML_OSTREAM * out ) const;

private:

};


class TiXmlDocument : public TiXmlNode
{
public:
        TiXmlDocument();
        TiXmlDocument( const char * documentName );

        #ifdef TIXML_USE_STL
        TiXmlDocument( const std::string& documentName );
        #endif

        TiXmlDocument( const TiXmlDocument& copy );
        TiXmlDocument& operator=( const TiXmlDocument& copy );

        virtual ~TiXmlDocument() {}

        bool LoadFile( TiXmlEncoding encoding = TIXML_DEFAULT_ENCODING );
        bool SaveFile() const;
        bool LoadFile( const char * filename, TiXmlEncoding encoding = TIXML_DEFAULT_ENCODING );
        bool SaveFile( const char * filename ) const;

        #ifdef TIXML_USE_STL
        bool LoadFile( const std::string& filename, TiXmlEncoding encoding = TIXML_DEFAULT_ENCODING )                   
        {
                StringToBuffer f( filename );
                return ( f.buffer && LoadFile( f.buffer, encoding ));
        }
        bool SaveFile( const std::string& filename ) const              
        {
                StringToBuffer f( filename );
                return ( f.buffer && SaveFile( f.buffer ));
        }
        #endif

        virtual const char* Parse( const char* p, TiXmlParsingData* data = 0, TiXmlEncoding encoding = TIXML_DEFAULT_ENCODING );

        const TiXmlElement* RootElement() const         { return FirstChildElement(); }
        TiXmlElement* RootElement()                                     { return FirstChildElement(); }

        bool Error() const                                              { return error; }

        const char * ErrorDesc() const  { return errorDesc.c_str (); }

        int ErrorId()   const                           { return errorId; }

        int ErrorRow()  { return errorLocation.row+1; }
        int ErrorCol()  { return errorLocation.col+1; } 

        void SetTabSize( int _tabsize )         { tabsize = _tabsize; }

        int TabSize() const     { return tabsize; }

        void ClearError()                                               {       error = false; 
                                                                                                errorId = 0; 
                                                                                                errorDesc = ""; 
                                                                                                errorLocation.row = errorLocation.col = 0; 
                                                                                                //errorLocation.last = 0; 
                                                                                        }

        void Print() const                                              { Print( stdout, 0 ); }

        virtual void Print( FILE* cfile, int depth = 0 ) const;
        // [internal use]
        void SetError( int err, const char* errorLocation, TiXmlParsingData* prevData, TiXmlEncoding encoding );

protected :
        virtual void StreamOut ( TIXML_OSTREAM * out) const;
        // [internal use]
        virtual TiXmlNode* Clone() const;
        #ifdef TIXML_USE_STL
            virtual void StreamIn( TIXML_ISTREAM * in, TIXML_STRING * tag );
        #endif

private:
        void CopyTo( TiXmlDocument* target ) const;

        bool error{};
        int  errorId{};
        TIXML_STRING errorDesc{};
        int tabsize{};
        TiXmlCursor errorLocation{};
};


class TiXmlHandle
{
public:
        TiXmlHandle( TiXmlNode* aNode )  { this->node = aNode; }
        TiXmlHandle( const TiXmlHandle& ref )                   { this->node = ref.node; }
        TiXmlHandle& operator=( const TiXmlHandle& ref ) { this->node = ref.node; return *this; }

        TiXmlHandle FirstChild() const;
        TiXmlHandle FirstChild( const char * value ) const;
        TiXmlHandle FirstChildElement() const;
        TiXmlHandle FirstChildElement( const char * value ) const;

        TiXmlHandle Child( const char* value, int index ) const;
        TiXmlHandle Child( int index ) const;
        TiXmlHandle ChildElement( const char* value, int index ) const;
        TiXmlHandle ChildElement( int index ) const;

        #ifdef TIXML_USE_STL
        TiXmlHandle FirstChild( const std::string& _value ) const                               { return FirstChild( _value.c_str() ); }
        TiXmlHandle FirstChildElement( const std::string& _value ) const                { return FirstChildElement( _value.c_str() ); }

        TiXmlHandle Child( const std::string& _value, int index ) const                 { return Child( _value.c_str(), index ); }
        TiXmlHandle ChildElement( const std::string& _value, int index ) const  { return ChildElement( _value.c_str(), index ); }
        #endif

        TiXmlNode* Node() const                 { return node; } 
        TiXmlElement* Element() const   { return ( ( node && node->ToElement() ) ? node->ToElement() : 0 ); }
        TiXmlText* Text() const                 { return ( ( node && node->ToText() ) ? node->ToText() : 0 ); }
        TiXmlUnknown* Unknown() const                   { return ( ( node && node->ToUnknown() ) ? node->ToUnknown() : 0 ); }

private:
        TiXmlNode* node{};
};



//fg: put it namespace gear
} // end namespace gear {



#ifdef _MSC_VER
#pragma warning( default : 4530 )
#pragma warning( default : 4786 )
#endif

#endif