推荐一个优秀的c++源代码，TinyXml2

tinyxml2.h

/*
Original code by 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.

*/

#ifndef TINYXML2_INCLUDED
#define TINYXML2_INCLUDED

#if defined(ANDROID_NDK) || defined(__BORLANDC__) || defined(__QNXNTO__)
  include 
  include 
  include 
  include 
  include 
  include 
#else
  include 
  include 
  include 
  include 
  include 
  include 
#endif

/*
   TODO: intern strings instead of allocation.

*/
/*
    gcc:
        g++ -Wall -DDEBUG tinyxml2.cpp xmltest.cpp -o gccxmltest.exe

    Formatting, Artistic Style:
        AStyle.exe --style=1tbs --indent-switches --break-closing-brackets --indent-preprocessor tinyxml2.cpp tinyxml2.h
*/

#if defined( _DEBUG ) || defined( DEBUG ) || defined (__DEBUG__)
  ifndef DEBUG
      define DEBUG
  endif
#endif

#ifdef _MSC_VER
  pragma warning(push)
  pragma warning(disable: 4251)
#endif

#ifdef _WIN32
  ifdef TINYXML2_EXPORT
      define TINYXML2_LIB __declspec(dllexport)
  elif defined(TINYXML2_IMPORT)
      define TINYXML2_LIB __declspec(dllimport)
  else
      define TINYXML2_LIB
  endif
#else
  define TINYXML2_LIB
#endif

#if defined(DEBUG)
  if defined(_MSC_VER)
      // "(void)0," is for suppressing C4127 warning in "assert(false)", "assert(true)" and the like
      define TIXMLASSERT( x )           if ( !((void)0,(x))) { __debugbreak(); } //if ( !(x)) WinDebugBreak()
  elif defined (ANDROID_NDK)
      include 
      define TIXMLASSERT( x )           if ( !(x)) { __android_log_assert( "assert", "grinliz", "ASSERT in '%s' at %d.", __FILE__, __LINE__ ); }
  else
      include 
      define TIXMLASSERT                assert
  endif
  else
      define TIXMLASSERT( x )           {}
#endif

#if defined(_MSC_VER) && (_MSC_VER >= 1400 ) && (!defined WINCE)
// Microsoft visual studio, version 2005 and higher.

/*int _snprintf_s(
   char *buffer,
   size_t sizeOfBuffer,
   size_t count,
   const char *format [,
      argument] ...

);*/
inline int TIXML_SNPRINTF( char* buffer, size_t size, const char* format, ... )
{
    va_list va;
    va_start( va, format );
    int result = vsnprintf_s( buffer, size, _TRUNCATE, format, va );
    va_end( va );
    return result;
}
#define TIXML_SSCANF   sscanf_s
#elif defined WINCE
#define TIXML_SNPRINTF _snprintf
#define TIXML_SSCANF   sscanf
#else
// GCC version 3 and higher
//#warning( "Using sn* functions." )
#define TIXML_SNPRINTF snprintf
#define TIXML_SSCANF   sscanf
#endif

/* Versioning, past 1.0.14:
    http://semver.org/
*/
static const int TIXML2_MAJOR_VERSION = 3;
static const int TIXML2_MINOR_VERSION = 0;
static const int TIXML2_PATCH_VERSION = 0;

namespace tinyxml2
{
class XMLDocument;
class XMLElement;
class XMLAttribute;
class XMLComment;
class XMLText;
class XMLDeclaration;
class XMLUnknown;
class XMLPrinter;

/*
    A class that wraps strings. Normally stores the start and end
    pointers into the XML file itself, and will apply normalization
    and entity translation if actually read. Can also store (and memory
    manage) a traditional char[]
*/
class StrPair
{
public:
    enum {
        NEEDS_ENTITY_PROCESSING         = 0x01,
        NEEDS_NEWLINE_NORMALIZATION     = 0x02,
        COLLAPSE_WHITESPACE                 = 0x04,

        TEXT_ELEMENT                        = NEEDS_ENTITY_PROCESSING | NEEDS_NEWLINE_NORMALIZATION,
        TEXT_ELEMENT_LEAVE_ENTITIES     = NEEDS_NEWLINE_NORMALIZATION,
        ATTRIBUTE_NAME                      = 0,
        ATTRIBUTE_VALUE                     = NEEDS_ENTITY_PROCESSING | NEEDS_NEWLINE_NORMALIZATION,
        ATTRIBUTE_VALUE_LEAVE_ENTITIES      = NEEDS_NEWLINE_NORMALIZATION,
        COMMENT                     = NEEDS_NEWLINE_NORMALIZATION
    };

    StrPair() : _flags( 0 ), _start( 0 ), _end( 0 ) {}
    ~StrPair();

    void Set( char* start, char* end, int flags ) {
        Reset();
        _start  = start;
        _end    = end;
        _flags  = flags | NEEDS_FLUSH;
    }

    const char* GetStr();

    bool Empty() const {
        return _start == _end;
    }

    void SetInternedStr( const char* str ) {
        Reset();
        _start = const_cast(str);
    }

    void SetStr( const char* str, int flags=0 );

    char* ParseText( char* in, const char* endTag, int strFlags );
    char* ParseName( char* in );

    void TransferTo( StrPair* other );

private:
    void Reset();
    void CollapseWhitespace();

    enum {
        NEEDS_FLUSH = 0x100,
        NEEDS_DELETE = 0x200
    };

    // After parsing, if *_end != 0, it can be set to zero.

    int     _flags;
    char*   _start;
    char*   _end;

    StrPair( const StrPair& other );    // not supported
    void operator=( StrPair& other );   // not supported, use TransferTo()
};

/*
    A dynamic array of Plain Old Data. Doesn't support constructors, etc.
    Has a small initial memory pool, so that low or no usage will not
    cause a call to new/delete
*/
template 
class DynArray
{
public:
    DynArray() {
        _mem = _pool;
        _allocated = INITIAL_SIZE;
        _size = 0;
    }

    ~DynArray() {
        if ( _mem != _pool ) {
            delete [] _mem;
        }
    }

    void Clear() {
        _size = 0;
    }

    void Push( T t ) {
        TIXMLASSERT( _size < INT_MAX );
        EnsureCapacity( _size+1 );
        _mem[_size++] = t;
    }

    T* PushArr( int count ) {
        TIXMLASSERT( count >= 0 );
        TIXMLASSERT( _size  0 );
        return _mem[--_size];
    }

    void PopArr( int count ) {
        TIXMLASSERT( _size >= count );
        _size -= count;
    }

    bool Empty() const                  {
        return _size == 0;
    }

    T& operator[](int i)                {
        TIXMLASSERT( i>= 0 && i < _size );
        return _mem[i];
    }

    const T& operator[](int i) const    {
        TIXMLASSERT( i>= 0 && i < _size );
        return _mem[i];
    }

    const T& PeekTop() const            {
        TIXMLASSERT( _size > 0 );
        return _mem[ _size - 1];
    }

    int Size() const                    {
        TIXMLASSERT( _size >= 0 );
        return _size;
    }

    int Capacity() const                {
        return _allocated;
    }

    const T* Mem() const                {
        return _mem;
    }

    T* Mem()                            {
        return _mem;
    }

private:
    DynArray( const DynArray& ); // not supported
    void operator=( const DynArray& ); // not supported

    void EnsureCapacity( int cap ) {
        TIXMLASSERT( cap > 0 );
        if ( cap > _allocated ) {
            TIXMLASSERT( cap 
class MemPoolT : public MemPool
{
public:
    MemPoolT() : _root(0), _currentAllocs(0), _nAllocs(0), _maxAllocs(0), _nUntracked(0)    {}
    ~MemPoolT() {
        Clear();
    }

    void Clear() {
        // Delete the blocks.

        while( !_blockPtrs.Empty()) {
            Block* b  = _blockPtrs.Pop();
            delete b;
        }
        _root = 0;
        _currentAllocs = 0;
        _nAllocs = 0;
        _maxAllocs = 0;
        _nUntracked = 0;
    }

    virtual int ItemSize() const    {
        return SIZE;
    }
    int CurrentAllocs() const       {
        return _currentAllocs;
    }

    virtual void* Alloc() {
        if ( !_root ) {
            // Need a new block.

            Block* block = new Block();
            _blockPtrs.Push( block );

            for( int i=0; ichunk[i].next = &block->chunk[i+1];
            }
            block->chunk[COUNT-1].next = 0;
            _root = block->chunk;
        }
        void* result = _root;
        _root = _root->next;

        ++_currentAllocs;
        if ( _currentAllocs > _maxAllocs ) {
            _maxAllocs = _currentAllocs;
        }
        _nAllocs++;
        _nUntracked++;
        return result;
    }

    virtual void Free( void* mem ) {
        if ( !mem ) {
            return;
        }
        --_currentAllocs;
        Chunk* chunk = static_cast( mem );
#ifdef DEBUG
        memset( chunk, 0xfe, sizeof(Chunk) );
#endif
        chunk->next = _root;
        _root = chunk;
    }
    void Trace( const char* name ) {
        printf( "Mempool %s watermark=%d [%dk] current=%d size=%d nAlloc=%d blocks=%d\n",
                name, _maxAllocs, _maxAllocs*SIZE/1024, _currentAllocs, SIZE, _nAllocs, _blockPtrs.Size() );
    }

    void SetTracked() {
        _nUntracked--;
    }

    int Untracked() const {
        return _nUntracked;
    }

    // This number is perf sensitive. 4k seems like a good tradeoff on my machine.
    // The test file is large, 170k.
    // Release:     VS2010 gcc(no opt)
    //      1k:     4000
    //      2k:     4000
    //      4k:     3900    21000
    //      16k:    5200
    //      32k:    4300
    //      64k:    4000    21000
    enum { COUNT = (4*1024)/SIZE }; // Some compilers do not accept to use COUNT in private part if COUNT is private

private:
    MemPoolT( const MemPoolT& ); // not supported
    void operator=( const MemPoolT& ); // not supported

    union Chunk {
        Chunk*  next;
        char    mem[SIZE];
    };
    struct Block {
        Chunk chunk[COUNT];
    };
    DynArray< Block*, 10 > _blockPtrs;
    Chunk* _root;

    int _currentAllocs;
    int _nAllocs;
    int _maxAllocs;
    int _nUntracked;
};

/**
    Implements the interface to the "Visitor pattern" (see the Accept() method.)
    If you call the Accept() method, it requires being passed a XMLVisitor
    class to handle callbacks. For nodes that contain other nodes (Document, Element)
    you will get called with a VisitEnter/VisitExit pair. Nodes that are always leafs
    are simply called with Visit().

    If you return 'true' from a Visit method, recursive parsing will continue. If you return
    false, no children of this node or its siblings will be visited.

    All flavors of Visit methods have a default implementation that returns 'true' (continue
    visiting). You need to only override methods that are interesting to you.

    Generally Accept() is called on the XMLDocument, although all nodes support visiting.

    You should never change the document from a callback.

    @sa XMLNode::Accept()
*/
class TINYXML2_LIB XMLVisitor
{
public:
    virtual ~XMLVisitor() {}

    /// Visit a document.

    virtual bool VisitEnter( const XMLDocument& /*doc*/ )           {
        return true;
    }
    /// Visit a document.

    virtual bool VisitExit( const XMLDocument& /*doc*/ )            {
        return true;
    }

    /// Visit an element.

    virtual bool VisitEnter( const XMLElement& /*element*/, const XMLAttribute* /*firstAttribute*/ )    {
        return true;
    }
    /// Visit an element.

    virtual bool VisitExit( const XMLElement& /*element*/ )         {
        return true;
    }

    /// Visit a declaration.

    virtual bool Visit( const XMLDeclaration& /*declaration*/ )     {
        return true;
    }
    /// Visit a text node.

    virtual bool Visit( const XMLText& /*text*/ )                   {
        return true;
    }
    /// Visit a comment node.

    virtual bool Visit( const XMLComment& /*comment*/ )             {
        return true;
    }
    /// Visit an unknown node.

    virtual bool Visit( const XMLUnknown& /*unknown*/ )             {
        return true;
    }
};

// WARNING: must match XMLDocument::_errorNames[]
enum XMLError {
    XML_SUCCESS = 0,
    XML_NO_ERROR = 0,
    XML_NO_ATTRIBUTE,
    XML_WRONG_ATTRIBUTE_TYPE,
    XML_ERROR_FILE_NOT_FOUND,
    XML_ERROR_FILE_COULD_NOT_BE_OPENED,
    XML_ERROR_FILE_READ_ERROR,
    XML_ERROR_ELEMENT_MISMATCH,
    XML_ERROR_PARSING_ELEMENT,
    XML_ERROR_PARSING_ATTRIBUTE,
    XML_ERROR_IDENTIFYING_TAG,
    XML_ERROR_PARSING_TEXT,
    XML_ERROR_PARSING_CDATA,
    XML_ERROR_PARSING_COMMENT,
    XML_ERROR_PARSING_DECLARATION,
    XML_ERROR_PARSING_UNKNOWN,
    XML_ERROR_EMPTY_DOCUMENT,
    XML_ERROR_MISMATCHED_ELEMENT,
    XML_ERROR_PARSING,
    XML_CAN_NOT_CONVERT_TEXT,
    XML_NO_TEXT_NODE,

    XML_ERROR_COUNT
};

/*
    Utility functionality.

*/
class XMLUtil
{
public:
    static const char* SkipWhiteSpace( const char* p )  {
        TIXMLASSERT( p );
        while( IsWhiteSpace(*p) ) {
            ++p;
        }
        TIXMLASSERT( p );
        return p;
    }
    static char* SkipWhiteSpace( char* p )              {
        return const_cast( SkipWhiteSpace( const_cast(p) ) );
    }

    // Anything in the high order range of UTF-8 is assumed to not be whitespace. This isn't
    // correct, but simple, and usually works.

    static bool IsWhiteSpace( char p )                  {
        return !IsUTF8Continuation(p) && isspace( static_cast(p) );
    }

    inline static bool IsNameStartChar( unsigned char ch ) {
        if ( ch >= 128 ) {
            // This is a heuristic guess in attempt to not implement Unicode-aware isalpha()
            return true;
        }
        if ( isalpha( ch ) ) {
            return true;
        }
        return ch == ':' || ch == '_';
    }

    inline static bool IsNameChar( unsigned char ch ) {
        return IsNameStartChar( ch )
               || isdigit( ch )
               || ch == '.'
               || ch == '-';
    }

    inline static bool StringEqual( const char* p, const char* q, int nChar=INT_MAX )  {
        if ( p == q ) {
            return true;
        }
        int n = 0;
        while( *p && *q && *p == *q && n(const_cast(this)->FirstChildElement( value ));
    }

    /// Get the last child node, or null if none exists.

    const XMLNode*  LastChild() const                       {
        return _lastChild;
    }

    XMLNode*        LastChild()                             {
        return _lastChild;
    }

    /** Get the last child element or optionally the last child
        element with the specified name.

    */
    const XMLElement* LastChildElement( const char* value=0 ) const;

    XMLElement* LastChildElement( const char* value=0 ) {
        return const_cast(const_cast(this)->LastChildElement(value) );
    }

    /// Get the previous (left) sibling node of this node.

    const XMLNode*  PreviousSibling() const                 {
        return _prev;
    }

    XMLNode*    PreviousSibling()                           {
        return _prev;
    }

    /// Get the previous (left) sibling element of this node, with an optionally supplied name.

    const XMLElement*   PreviousSiblingElement( const char* value=0 ) const ;

    XMLElement* PreviousSiblingElement( const char* value=0 ) {
        return const_cast(const_cast(this)->PreviousSiblingElement( value ) );
    }

    /// Get the next (right) sibling node of this node.

    const XMLNode*  NextSibling() const                     {
        return _next;
    }

    XMLNode*    NextSibling()                               {
        return _next;
    }

    /// Get the next (right) sibling element of this node, with an optionally supplied name.

    const XMLElement*   NextSiblingElement( const char* value=0 ) const;

    XMLElement* NextSiblingElement( const char* value=0 )   {
        return const_cast(const_cast(this)->NextSiblingElement( value ) );
    }

    /**
        Add a child node as the last (right) child.
        If the child node is already part of the document,
        it is moved from its old location to the new location.
        Returns the addThis argument or 0 if the node does not
        belong to the same document.

    */
    XMLNode* InsertEndChild( XMLNode* addThis );

    XMLNode* LinkEndChild( XMLNode* addThis )   {
        return InsertEndChild( addThis );
    }
    /**
        Add a child node as the first (left) child.
        If the child node is already part of the document,
        it is moved from its old location to the new location.
        Returns the addThis argument or 0 if the node does not
        belong to the same document.

    */
    XMLNode* InsertFirstChild( XMLNode* addThis );
    /**
        Add a node after the specified child node.
        If the child node is already part of the document,
        it is moved from its old location to the new location.
        Returns the addThis argument or 0 if the afterThis node
        is not a child of this node, or if the node does not
        belong to the same document.

    */
    XMLNode* InsertAfterChild( XMLNode* afterThis, XMLNode* addThis );

    /**
        Delete all the children of this node.

    */
    void DeleteChildren();

    /**
        Delete a child of this node.

    */
    void DeleteChild( XMLNode* node );

    /**
        Make a copy of this node, but not its children.

        You may pass in a Document pointer that will be
        the owner of the new Node. If the 'document' is
        null, then the node returned will be allocated
        from the current Document. (this->GetDocument())

        Note: if called on a XMLDocument, this will return null.

    */
    virtual XMLNode* ShallowClone( XMLDocument* document ) const = 0;

    /**
        Test if 2 nodes are the same, but don't test children.

        The 2 nodes do not need to be in the same Document.

        Note: if called on a XMLDocument, this will return false.

    */
    virtual bool ShallowEqual( const XMLNode* compare ) const = 0;

    /** Accept a hierarchical visit of the nodes in the TinyXML-2 DOM. Every node in the
        XML tree will be conditionally visited and the host will be called back
        via the XMLVisitor interface.

        This is essentially a SAX interface for TinyXML-2. (Note however it doesn't re-parse
        the XML for the callbacks, so the performance of TinyXML-2 is unchanged by using this
        interface versus any other.)

        The interface has been based on ideas from:

        - http://www.saxproject.org/
        - http://c2.com/cgi/wiki?HierarchicalVisitorPattern

        Which are both good references for "visiting".

        An example of using Accept():
        @verbatim
        XMLPrinter printer;
        tinyxmlDoc.Accept( &printer );
        const char* xmlcstr = printer.CStr();
        @endverbatim
    */
    virtual bool Accept( XMLVisitor* visitor ) const = 0;

protected:
    XMLNode( XMLDocument* );
    virtual ~XMLNode();

    virtual char* ParseDeep( char*, StrPair* );

    XMLDocument*    _document;
    XMLNode*        _parent;
    mutable StrPair _value;

    XMLNode*        _firstChild;
    XMLNode*        _lastChild;

    XMLNode*        _prev;
    XMLNode*        _next;

private:
    MemPool*        _memPool;
    void Unlink( XMLNode* child );
    static void DeleteNode( XMLNode* node );
    void InsertChildPreamble( XMLNode* insertThis ) const;

    XMLNode( const XMLNode& );  // not supported
    XMLNode& operator=( const XMLNode& );   // not supported
};

/** XML text.

    Note that a text node can have child element nodes, for example:
    @verbatim
    This is bold
    @endverbatim

    A text node can have 2 ways to output the next. "normal" output
    and CDATA. It will default to the mode it was parsed from the XML file and
    you generally want to leave it alone, but you can change the output mode with
    SetCData() and query it with CData().

*/
class TINYXML2_LIB XMLText : public XMLNode
{
    friend class XMLBase;
    friend class XMLDocument;
public:
    virtual bool Accept( XMLVisitor* visitor ) const;

    virtual XMLText* ToText()           {
        return this;
    }
    virtual const XMLText* ToText() const   {
        return this;
    }

    /// Declare whether this should be CDATA or standard text.

    void SetCData( bool isCData )           {
        _isCData = isCData;
    }
    /// Returns true if this is a CDATA text element.

    bool CData() const                      {
        return _isCData;
    }

    virtual XMLNode* ShallowClone( XMLDocument* document ) const;
    virtual bool ShallowEqual( const XMLNode* compare ) const;

protected:
    XMLText( XMLDocument* doc ) : XMLNode( doc ), _isCData( false ) {}
    virtual ~XMLText()                                              {}

    char* ParseDeep( char*, StrPair* endTag );

private:
    bool _isCData;

    XMLText( const XMLText& );  // not supported
    XMLText& operator=( const XMLText& );   // not supported
};

/** An XML Comment. */
class TINYXML2_LIB XMLComment : public XMLNode
{
    friend class XMLDocument;
public:
    virtual XMLComment* ToComment()                 {
        return this;
    }
    virtual const XMLComment* ToComment() const     {
        return this;
    }

    virtual bool Accept( XMLVisitor* visitor ) const;

    virtual XMLNode* ShallowClone( XMLDocument* document ) const;
    virtual bool ShallowEqual( const XMLNode* compare ) const;

protected:
    XMLComment( XMLDocument* doc );
    virtual ~XMLComment();

    char* ParseDeep( char*, StrPair* endTag );

private:
    XMLComment( const XMLComment& );    // not supported
    XMLComment& operator=( const XMLComment& ); // not supported
};

/** In correct XML the declaration is the first entry in the file.
    @verbatim
        
    @endverbatim

    TinyXML-2 will happily read or write files without a declaration,
    however.

    The text of the declaration isn't interpreted. It is parsed
    and written as a string.

*/
class TINYXML2_LIB XMLDeclaration : public XMLNode
{
    friend class XMLDocument;
public:
    virtual XMLDeclaration* ToDeclaration()                 {
        return this;
    }
    virtual const XMLDeclaration* ToDeclaration() const     {
        return this;
    }

    virtual bool Accept( XMLVisitor* visitor ) const;

    virtual XMLNode* ShallowClone( XMLDocument* document ) const;
    virtual bool ShallowEqual( const XMLNode* compare ) const;

protected:
    XMLDeclaration( XMLDocument* doc );
    virtual ~XMLDeclaration();

    char* ParseDeep( char*, StrPair* endTag );

private:
    XMLDeclaration( const XMLDeclaration& );    // not supported
    XMLDeclaration& operator=( const XMLDeclaration& ); // not supported
};

/** Any tag that TinyXML-2 doesn't recognize is saved as an
    unknown. It is a tag of text, but should not be modified.
    It will be written back to the XML, unchanged, when the file
    is saved.

    DTD tags get thrown into XMLUnknowns.

*/
class TINYXML2_LIB XMLUnknown : public XMLNode
{
    friend class XMLDocument;
public:
    virtual XMLUnknown* ToUnknown()                 {
        return this;
    }
    virtual const XMLUnknown* ToUnknown() const     {
        return this;
    }

    virtual bool Accept( XMLVisitor* visitor ) const;

    virtual XMLNode* ShallowClone( XMLDocument* document ) const;
    virtual bool ShallowEqual( const XMLNode* compare ) const;

protected:
    XMLUnknown( XMLDocument* doc );
    virtual ~XMLUnknown();

    char* ParseDeep( char*, StrPair* endTag );

private:
    XMLUnknown( const XMLUnknown& );    // not supported
    XMLUnknown& operator=( const XMLUnknown& ); // not supported
};

/** An attribute is a name-value pair. Elements have an arbitrary
    number of attributes, each with a unique name.

    @note The attributes are not XMLNodes. You may only query the
    Next() attribute in a list.

*/
class TINYXML2_LIB XMLAttribute
{
    friend class XMLElement;
public:
    /// The name of the attribute.

    const char* Name() const;

    /// The value of the attribute.

    const char* Value() const;

    /// The next attribute in the list.

    const XMLAttribute* Next() const {
        return _next;
    }

    /** IntValue interprets the attribute as an integer, and returns the value.

        If the value isn't an integer, 0 will be returned. There is no error checking;
        use QueryIntValue() if you need error checking.

    */
    int      IntValue() const               {
        int i=0;
        QueryIntValue( &i );
        return i;
    }
    /// Query as an unsigned integer. See IntValue()
    unsigned UnsignedValue() const          {
        unsigned i=0;
        QueryUnsignedValue( &i );
        return i;
    }
    /// Query as a boolean. See IntValue()
    bool     BoolValue() const              {
        bool b=false;
        QueryBoolValue( &b );
        return b;
    }
    /// Query as a double. See IntValue()
    double   DoubleValue() const            {
        double d=0;
        QueryDoubleValue( &d );
        return d;
    }
    /// Query as a float. See IntValue()
    float    FloatValue() const             {
        float f=0;
        QueryFloatValue( &f );
        return f;
    }

    /** QueryIntValue interprets the attribute as an integer, and returns the value
        in the provided parameter. The function will return XML_NO_ERROR on success,
        and XML_WRONG_ATTRIBUTE_TYPE if the conversion is not successful.

    */
    XMLError QueryIntValue( int* value ) const;
    /// See QueryIntValue
    XMLError QueryUnsignedValue( unsigned int* value ) const;
    /// See QueryIntValue
    XMLError QueryBoolValue( bool* value ) const;
    /// See QueryIntValue
    XMLError QueryDoubleValue( double* value ) const;
    /// See QueryIntValue
    XMLError QueryFloatValue( float* value ) const;

    /// Set the attribute to a string value.

    void SetAttribute( const char* value );
    /// Set the attribute to value.

    void SetAttribute( int value );
    /// Set the attribute to value.

    void SetAttribute( unsigned value );
    /// Set the attribute to value.

    void SetAttribute( bool value );
    /// Set the attribute to value.

    void SetAttribute( double value );
    /// Set the attribute to value.

    void SetAttribute( float value );

private:
    enum { BUF_SIZE = 200 };

    XMLAttribute() : _next( 0 ), _memPool( 0 ) {}
    virtual ~XMLAttribute() {}

    XMLAttribute( const XMLAttribute& );    // not supported
    void operator=( const XMLAttribute& );  // not supported
    void SetName( const char* name );

    char* ParseDeep( char* p, bool processEntities );

    mutable StrPair _name;
    mutable StrPair _value;
    XMLAttribute*   _next;
    MemPool*        _memPool;
};

/** The element is a container class. It has a value, the element name,
    and can contain other elements, text, comments, and unknowns.
    Elements also contain an arbitrary number of attributes.

*/
class TINYXML2_LIB XMLElement : public XMLNode
{
    friend class XMLBase;
    friend class XMLDocument;
public:
    /// Get the name of an element (which is the Value() of the node.)
    const char* Name() const        {
        return Value();
    }
    /// Set the name of the element.

    void SetName( const char* str, bool staticMem=false )   {
        SetValue( str, staticMem );
    }

    virtual XMLElement* ToElement()             {
        return this;
    }
    virtual const XMLElement* ToElement() const {
        return this;
    }
    virtual bool Accept( XMLVisitor* visitor ) const;

    /** Given an attribute name, Attribute() returns the value
        for the attribute of that name, or null if none
        exists. For example:

        @verbatim
        const char* value = ele->Attribute( "foo" );
        @endverbatim

        The 'value' parameter is normally null. However, if specified,
        the attribute will only be returned if the 'name' and 'value'
        match. This allow you to write code:

        @verbatim
        if ( ele->Attribute( "foo", "bar" ) ) callFooIsBar();
        @endverbatim

        rather than:
        @verbatim
        if ( ele->Attribute( "foo" ) ) {
            if ( strcmp( ele->Attribute( "foo" ), "bar" ) == 0 ) callFooIsBar();
        }
        @endverbatim
    */
    const char* Attribute( const char* name, const char* value=0 ) const;

    /** Given an attribute name, IntAttribute() returns the value
        of the attribute interpreted as an integer. 0 will be
        returned if there is an error. For a method with error
        checking, see QueryIntAttribute()
    */
    int      IntAttribute( const char* name ) const     {
        int i=0;
        QueryIntAttribute( name, &i );
        return i;
    }
    /// See IntAttribute()
    unsigned UnsignedAttribute( const char* name ) const {
        unsigned i=0;
        QueryUnsignedAttribute( name, &i );
        return i;
    }
    /// See IntAttribute()
    bool     BoolAttribute( const char* name ) const    {
        bool b=false;
        QueryBoolAttribute( name, &b );
        return b;
    }
    /// See IntAttribute()
    double   DoubleAttribute( const char* name ) const  {
        double d=0;
        QueryDoubleAttribute( name, &d );
        return d;
    }
    /// See IntAttribute()
    float    FloatAttribute( const char* name ) const   {
        float f=0;
        QueryFloatAttribute( name, &f );
        return f;
    }

    /** Given an attribute name, QueryIntAttribute() returns
        XML_NO_ERROR, XML_WRONG_ATTRIBUTE_TYPE if the conversion
        can't be performed, or XML_NO_ATTRIBUTE if the attribute
        doesn't exist. If successful, the result of the conversion
        will be written to 'value'. If not successful, nothing will
        be written to 'value'. This allows you to provide default
        value:

        @verbatim
        int value = 10;
        QueryIntAttribute( "foo", &value );       // if "foo" isn't found, value will still be 10
        @endverbatim
    */
    XMLError QueryIntAttribute( const char* name, int* value ) const                {
        const XMLAttribute* a = FindAttribute( name );
        if ( !a ) {
            return XML_NO_ATTRIBUTE;
        }
        return a->QueryIntValue( value );
    }
    /// See QueryIntAttribute()
    XMLError QueryUnsignedAttribute( const char* name, unsigned int* value ) const  {
        const XMLAttribute* a = FindAttribute( name );
        if ( !a ) {
            return XML_NO_ATTRIBUTE;
        }
        return a->QueryUnsignedValue( value );
    }
    /// See QueryIntAttribute()
    XMLError QueryBoolAttribute( const char* name, bool* value ) const              {
        const XMLAttribute* a = FindAttribute( name );
        if ( !a ) {
            return XML_NO_ATTRIBUTE;
        }
        return a->QueryBoolValue( value );
    }
    /// See QueryIntAttribute()
    XMLError QueryDoubleAttribute( const char* name, double* value ) const          {
        const XMLAttribute* a = FindAttribute( name );
        if ( !a ) {
            return XML_NO_ATTRIBUTE;
        }
        return a->QueryDoubleValue( value );
    }
    /// See QueryIntAttribute()
    XMLError QueryFloatAttribute( const char* name, float* value ) const            {
        const XMLAttribute* a = FindAttribute( name );
        if ( !a ) {
            return XML_NO_ATTRIBUTE;
        }
        return a->QueryFloatValue( value );
    }

    /** Given an attribute name, QueryAttribute() returns
        XML_NO_ERROR, XML_WRONG_ATTRIBUTE_TYPE if the conversion
        can't be performed, or XML_NO_ATTRIBUTE if the attribute
        doesn't exist. It is overloaded for the primitive types,
        and is a generally more convenient replacement of
        QueryIntAttribute() and related functions.

        If successful, the result of the conversion
        will be written to 'value'. If not successful, nothing will
        be written to 'value'. This allows you to provide default
        value:

        @verbatim
        int value = 10;
        QueryAttribute( "foo", &value );      // if "foo" isn't found, value will still be 10
        @endverbatim
    */
    int QueryAttribute( const char* name, int* value ) const {
        return QueryIntAttribute( name, value );
    }

    int QueryAttribute( const char* name, unsigned int* value ) const {
        return QueryUnsignedAttribute( name, value );
    }

    int QueryAttribute( const char* name, bool* value ) const {
        return QueryBoolAttribute( name, value );
    }

    int QueryAttribute( const char* name, double* value ) const {
        return QueryDoubleAttribute( name, value );
    }

    int QueryAttribute( const char* name, float* value ) const {
        return QueryFloatAttribute( name, value );
    }

    /// Sets the named attribute to value.

    void SetAttribute( const char* name, const char* value )    {
        XMLAttribute* a = FindOrCreateAttribute( name );
        a->SetAttribute( value );
    }
    /// Sets the named attribute to value.

    void SetAttribute( const char* name, int value )            {
        XMLAttribute* a = FindOrCreateAttribute( name );
        a->SetAttribute( value );
    }
    /// Sets the named attribute to value.

    void SetAttribute( const char* name, unsigned value )       {
        XMLAttribute* a = FindOrCreateAttribute( name );
        a->SetAttribute( value );
    }
    /// Sets the named attribute to value.

    void SetAttribute( const char* name, bool value )           {
        XMLAttribute* a = FindOrCreateAttribute( name );
        a->SetAttribute( value );
    }
    /// Sets the named attribute to value.

    void SetAttribute( const char* name, double value )     {
        XMLAttribute* a = FindOrCreateAttribute( name );
        a->SetAttribute( value );
    }
    /// Sets the named attribute to value.

    void SetAttribute( const char* name, float value )      {
        XMLAttribute* a = FindOrCreateAttribute( name );
        a->SetAttribute( value );
    }

    /**
        Delete an attribute.

    */
    void DeleteAttribute( const char* name );

    /// Return the first attribute in the list.

    const XMLAttribute* FirstAttribute() const {
        return _rootAttribute;
    }
    /// Query a specific attribute in the list.

    const XMLAttribute* FindAttribute( const char* name ) const;

    /** Convenience function for easy access to the text inside an element. Although easy
        and concise, GetText() is limited compared to getting the XMLText child
        and accessing it directly.

        If the first child of 'this' is a XMLText, the GetText()
        returns the character string of the Text node, else null is returned.

        This is a convenient method for getting the text of simple contained text:
        @verbatim
        This is text
            const char* str = fooElement->GetText();
        @endverbatim

        'str' will be a pointer to "This is text".

        Note that this function can be misleading. If the element foo was created from
        this XML:
        @verbatim
            This is text
        @endverbatim

        then the value of str would be null. The first child node isn't a text node, it is
        another element. From this XML:
        @verbatim
            This is text
        @endverbatim
        GetText() will return "This is ".

    */
    const char* GetText() const;

    /** Convenience function for easy access to the text inside an element. Although easy
        and concise, SetText() is limited compared to creating an XMLText child
        and mutating it directly.

        If the first child of 'this' is a XMLText, SetText() sets its value to
        the given string, otherwise it will create a first child that is an XMLText.

        This is a convenient method for setting the text of simple contained text:
        @verbatim
        This is text
            fooElement->SetText( "Hullaballoo!" );
        Hullaballoo!
        @endverbatim

        Note that this function can be misleading. If the element foo was created from
        this XML:
        @verbatim
            This is text
        @endverbatim

        then it will not change "This is text", but rather prefix it with a text element:
        @verbatim
            Hullaballoo!This is text
        @endverbatim

        For this XML:
        @verbatim
            
        @endverbatim
        SetText() will generate
        @verbatim
            Hullaballoo!
        @endverbatim
    */
    void SetText( const char* inText );
    /// Convenience method for setting text inside and element. See SetText() for important limitations.

    void SetText( int value );
    /// Convenience method for setting text inside and element. See SetText() for important limitations.

    void SetText( unsigned value );
    /// Convenience method for setting text inside and element. See SetText() for important limitations.

    void SetText( bool value );
    /// Convenience method for setting text inside and element. See SetText() for important limitations.

    void SetText( double value );
    /// Convenience method for setting text inside and element. See SetText() for important limitations.

    void SetText( float value );

    /**
        Convenience method to query the value of a child text node. This is probably best
        shown by example. Given you have a document is this form:
        @verbatim
            
                1
                1.4
            
        @endverbatim

        The QueryIntText() and similar functions provide a safe and easier way to get to the
        "value" of x and y.

        @verbatim
            int x = 0;
            float y = 0;    // types of x and y are contrived for example
            const XMLElement* xElement = pointElement->FirstChildElement( "x" );
            const XMLElement* yElement = pointElement->FirstChildElement( "y" );
            xElement->QueryIntText( &x );
            yElement->QueryFloatText( &y );
        @endverbatim

        @returns XML_SUCCESS (0) on success, XML_CAN_NOT_CONVERT_TEXT if the text cannot be converted
                 to the requested type, and XML_NO_TEXT_NODE if there is no child text to query.

    */
    XMLError QueryIntText( int* ival ) const;
    /// See QueryIntText()
    XMLError QueryUnsignedText( unsigned* uval ) const;
    /// See QueryIntText()
    XMLError QueryBoolText( bool* bval ) const;
    /// See QueryIntText()
    XMLError QueryDoubleText( double* dval ) const;
    /// See QueryIntText()
    XMLError QueryFloatText( float* fval ) const;

    // internal:
    enum {
        OPEN,       // 
        CLOSED,     // 
        CLOSING     // 
    };
    int ClosingType() const {
        return _closingType;
    }
    virtual XMLNode* ShallowClone( XMLDocument* document ) const;
    virtual bool ShallowEqual( const XMLNode* compare ) const;

protected:
    char* ParseDeep( char* p, StrPair* endTag );

private:
    XMLElement( XMLDocument* doc );
    virtual ~XMLElement();
    XMLElement( const XMLElement& );    // not supported
    void operator=( const XMLElement& );    // not supported

    XMLAttribute* FindAttribute( const char* name ) {
        return const_cast(const_cast(this)->FindAttribute( name ));
    }
    XMLAttribute* FindOrCreateAttribute( const char* name );
    //void LinkAttribute( XMLAttribute* attrib );
    char* ParseAttributes( char* p );
    static void DeleteAttribute( XMLAttribute* attribute );

    enum { BUF_SIZE = 200 };
    int _closingType;
    // The attribute list is ordered; there is no 'lastAttribute'
    // because the list needs to be scanned for dupes before adding
    // a new attribute.

    XMLAttribute* _rootAttribute;
};

enum Whitespace {
    PRESERVE_WHITESPACE,
    COLLAPSE_WHITESPACE
};

/** A Document binds together all the functionality.
    It can be saved, loaded, and printed to the screen.
    All Nodes are connected and allocated to a Document.
    If the Document is deleted, all its Nodes are also deleted.

*/
class TINYXML2_LIB XMLDocument : public XMLNode
{
    friend class XMLElement;
public:
    /// constructor
    XMLDocument( bool processEntities = true, Whitespace = PRESERVE_WHITESPACE );
    ~XMLDocument();

    virtual XMLDocument* ToDocument()               {
        return this;
    }
    virtual const XMLDocument* ToDocument() const   {
        return this;
    }

    /**
        Parse an XML file from a character string.

        Returns XML_NO_ERROR (0) on success, or
        an errorID.

        You may optionally pass in the 'nBytes', which is
        the number of bytes which will be parsed. If not
        specified, TinyXML-2 will assume 'xml' points to a
        null terminated string.

    */
    XMLError Parse( const char* xml, size_t nBytes=(size_t)(-1) );

    /**
        Load an XML file from disk.

        Returns XML_NO_ERROR (0) on success, or
        an errorID.

    */
    XMLError LoadFile( const char* filename );

    /**
        Load an XML file from disk. You are responsible
        for providing and closing the FILE*.

        NOTE: The file should be opened as binary ("rb")
        not text in order for TinyXML-2 to correctly
        do newline normalization.

        Returns XML_NO_ERROR (0) on success, or
        an errorID.

    */
    XMLError LoadFile( FILE* );

    /**
        Save the XML file to disk.

        Returns XML_NO_ERROR (0) on success, or
        an errorID.

    */
    XMLError SaveFile( const char* filename, bool compact = false );

    /**
        Save the XML file to disk. You are responsible
        for providing and closing the FILE*.

        Returns XML_NO_ERROR (0) on success, or
        an errorID.

    */
    XMLError SaveFile( FILE* fp, bool compact = false );

    bool ProcessEntities() const        {
        return _processEntities;
    }
    Whitespace WhitespaceMode() const   {
        return _whitespace;
    }

    /**
        Returns true if this document has a leading Byte Order Mark of UTF8.

    */
    bool HasBOM() const {
        return _writeBOM;
    }
    /** Sets whether to write the BOM when writing the file.

    */
    void SetBOM( bool useBOM ) {
        _writeBOM = useBOM;
    }

    /** Return the root element of DOM. Equivalent to FirstChildElement().

        To get the first node, use FirstChild().

    */
    XMLElement* RootElement()               {
        return FirstChildElement();
    }
    const XMLElement* RootElement() const   {
        return FirstChildElement();
    }

    /** Print the Document. If the Printer is not provided, it will
        print to stdout. If you provide Printer, this can print to a file:
        @verbatim
        XMLPrinter printer( fp );
        doc.Print( &printer );
        @endverbatim

        Or you can use a printer to print to memory:
        XMLPrinter printer;
        doc.Print( &printer );
        // printer.CStr() has a const char* to the XML
        @endverbatim
    */
    void Print( XMLPrinter* streamer=0 ) const;
    virtual bool Accept( XMLVisitor* visitor ) const;

    /**
        Create a new Element associated with
        this Document. The memory for the Element
        is managed by the Document.

    */
    XMLElement* NewElement( const char* name );
    /**
        Create a new Comment associated with
        this Document. The memory for the Comment
        is managed by the Document.

    */
    XMLComment* NewComment( const char* comment );
    /**
        Create a new Text associated with
        this Document. The memory for the Text
        is managed by the Document.

    */
    XMLText* NewText( const char* text );
    /**
        Create a new Declaration associated with
        this Document. The memory for the object
        is managed by the Document.

        If the 'text' param is null, the standard
        declaration is used.:
        @verbatim
            
        @endverbatim
    */
    XMLDeclaration* NewDeclaration( const char* text=0 );
    /**
        Create a new Unknown associated with
        this Document. The memory for the object
        is managed by the Document.

    */
    XMLUnknown* NewUnknown( const char* text );

    /**
        Delete a node associated with this document.

        It will be unlinked from the DOM.

    */
    void DeleteNode( XMLNode* node );

    void SetError( XMLError error, const char* str1, const char* str2 );

    /// Return true if there was an error parsing the document.

    bool Error() const {
        return _errorID != XML_NO_ERROR;
    }
    /// Return the errorID.

    XMLError  ErrorID() const {
        return _errorID;
    }
    const char* ErrorName() const;

    /// Return a possibly helpful diagnostic location or string.

    const char* GetErrorStr1() const {
        return _errorStr1;
    }
    /// Return a possibly helpful secondary diagnostic location or string.

    const char* GetErrorStr2() const {
        return _errorStr2;
    }
    /// If there is an error, print it to stdout.

    void PrintError() const;

    /// Clear the document, resetting it to the initial state.

    void Clear();

    // internal
    char* Identify( char* p, XMLNode** node );

    virtual XMLNode* ShallowClone( XMLDocument* /*document*/ ) const    {
        return 0;
    }
    virtual bool ShallowEqual( const XMLNode* /*compare*/ ) const   {
        return false;
    }

private:
    XMLDocument( const XMLDocument& );  // not supported
    void operator=( const XMLDocument& );   // not supported

    bool        _writeBOM;
    bool        _processEntities;
    XMLError    _errorID;
    Whitespace  _whitespace;
    const char* _errorStr1;
    const char* _errorStr2;
    char*       _charBuffer;

    MemPoolT< sizeof(XMLElement) >     _elementPool;
    MemPoolT< sizeof(XMLAttribute) > _attributePool;
    MemPoolT< sizeof(XMLText) >        _textPool;
    MemPoolT< sizeof(XMLComment) >     _commentPool;

    static const char* _errorNames[XML_ERROR_COUNT];

    void Parse();
};

/**
    A XMLHandle is a class that wraps a node pointer with null checks; this is
    an incredibly useful thing. Note that XMLHandle is not part of the TinyXML-2
    DOM structure. It is a separate utility class.

    Take an example:
    @verbatim
    
        
            
            
        
    
    @endverbatim

    Assuming you want the value of "attributeB" in the 2nd "Child" element, it's very
    easy to write a *lot* of code that looks like:

    @verbatim
    XMLElement* root = document.FirstChildElement( "Document" );
    if ( root )
    {
        XMLElement* element = root->FirstChildElement( "Element" );
        if ( element )
        {
            XMLElement* child = element->FirstChildElement( "Child" );
            if ( child )
            {
                XMLElement* child2 = child->NextSiblingElement( "Child" );
                if ( child2 )
                {
                    // Finally do something useful.
    @endverbatim

    And that doesn't even cover "else" cases. XMLHandle addresses the verbosity
    of such code. A XMLHandle checks for null pointers so it is perfectly safe
    and correct to use:

    @verbatim
    XMLHandle docHandle( &document );
    XMLElement* child2 = docHandle.FirstChildElement( "Document" ).FirstChildElement( "Element" ).FirstChildElement().NextSiblingElement();
    if ( child2 )
    {
        // do something useful
    @endverbatim

    Which is MUCH more concise and useful.

    It is also safe to copy handles - internally they are nothing more than node pointers.
    @verbatim
    XMLHandle handleCopy = handle;
    @endverbatim

    See also XMLConstHandle, which is the same as XMLHandle, but operates on const objects.

*/
class TINYXML2_LIB XMLHandle
{
public:
    /// Create a handle from any node (at any depth of the tree.) This can be a null pointer.

    XMLHandle( XMLNode* node )                                              {
        _node = node;
    }
    /// Create a handle from a node.

    XMLHandle( XMLNode& node )                                              {
        _node = &node;
    }
    /// Copy constructor
    XMLHandle( const XMLHandle& ref )                                       {
        _node = ref._node;
    }
    /// Assignment
    XMLHandle& operator=( const XMLHandle& ref )                            {
        _node = ref._node;
        return *this;
    }

    /// Get the first child of this handle.

    XMLHandle FirstChild()                                                  {
        return XMLHandle( _node ? _node->FirstChild() : 0 );
    }
    /// Get the first child element of this handle.

    XMLHandle FirstChildElement( const char* value=0 )                      {
        return XMLHandle( _node ? _node->FirstChildElement( value ) : 0 );
    }
    /// Get the last child of this handle.

    XMLHandle LastChild()                                                   {
        return XMLHandle( _node ? _node->LastChild() : 0 );
    }
    /// Get the last child element of this handle.

    XMLHandle LastChildElement( const char* _value=0 )                      {
        return XMLHandle( _node ? _node->LastChildElement( _value ) : 0 );
    }
    /// Get the previous sibling of this handle.

    XMLHandle PreviousSibling()                                             {
        return XMLHandle( _node ? _node->PreviousSibling() : 0 );
    }
    /// Get the previous sibling element of this handle.

    XMLHandle PreviousSiblingElement( const char* _value=0 )                {
        return XMLHandle( _node ? _node->PreviousSiblingElement( _value ) : 0 );
    }
    /// Get the next sibling of this handle.

    XMLHandle NextSibling()                                                 {
        return XMLHandle( _node ? _node->NextSibling() : 0 );
    }
    /// Get the next sibling element of this handle.

    XMLHandle NextSiblingElement( const char* _value=0 )                    {
        return XMLHandle( _node ? _node->NextSiblingElement( _value ) : 0 );
    }

    /// Safe cast to XMLNode. This can return null.

    XMLNode* ToNode()                           {
        return _node;
    }
    /// Safe cast to XMLElement. This can return null.

    XMLElement* ToElement()                     {
        return ( ( _node == 0 ) ? 0 : _node->ToElement() );
    }
    /// Safe cast to XMLText. This can return null.

    XMLText* ToText()                           {
        return ( ( _node == 0 ) ? 0 : _node->ToText() );
    }
    /// Safe cast to XMLUnknown. This can return null.

    XMLUnknown* ToUnknown()                     {
        return ( ( _node == 0 ) ? 0 : _node->ToUnknown() );
    }
    /// Safe cast to XMLDeclaration. This can return null.

    XMLDeclaration* ToDeclaration()             {
        return ( ( _node == 0 ) ? 0 : _node->ToDeclaration() );
    }

private:
    XMLNode* _node;
};

/**
    A variant of the XMLHandle class for working with const XMLNodes and Documents. It is the
    same in all regards, except for the 'const' qualifiers. See XMLHandle for API.

*/
class TINYXML2_LIB XMLConstHandle
{
public:
    XMLConstHandle( const XMLNode* node )                                           {
        _node = node;
    }
    XMLConstHandle( const XMLNode& node )                                           {
        _node = &node;
    }
    XMLConstHandle( const XMLConstHandle& ref )                                     {
        _node = ref._node;
    }

    XMLConstHandle& operator=( const XMLConstHandle& ref )                          {
        _node = ref._node;
        return *this;
    }

    const XMLConstHandle FirstChild() const                                         {
        return XMLConstHandle( _node ? _node->FirstChild() : 0 );
    }
    const XMLConstHandle FirstChildElement( const char* value=0 ) const             {
        return XMLConstHandle( _node ? _node->FirstChildElement( value ) : 0 );
    }
    const XMLConstHandle LastChild()    const                                       {
        return XMLConstHandle( _node ? _node->LastChild() : 0 );
    }
    const XMLConstHandle LastChildElement( const char* _value=0 ) const             {
        return XMLConstHandle( _node ? _node->LastChildElement( _value ) : 0 );
    }
    const XMLConstHandle PreviousSibling() const                                    {
        return XMLConstHandle( _node ? _node->PreviousSibling() : 0 );
    }
    const XMLConstHandle PreviousSiblingElement( const char* _value=0 ) const       {
        return XMLConstHandle( _node ? _node->PreviousSiblingElement( _value ) : 0 );
    }
    const XMLConstHandle NextSibling() const                                        {
        return XMLConstHandle( _node ? _node->NextSibling() : 0 );
    }
    const XMLConstHandle NextSiblingElement( const char* _value=0 ) const           {
        return XMLConstHandle( _node ? _node->NextSiblingElement( _value ) : 0 );
    }

    const XMLNode* ToNode() const               {
        return _node;
    }
    const XMLElement* ToElement() const         {
        return ( ( _node == 0 ) ? 0 : _node->ToElement() );
    }
    const XMLText* ToText() const               {
        return ( ( _node == 0 ) ? 0 : _node->ToText() );
    }
    const XMLUnknown* ToUnknown() const         {
        return ( ( _node == 0 ) ? 0 : _node->ToUnknown() );
    }
    const XMLDeclaration* ToDeclaration() const {
        return ( ( _node == 0 ) ? 0 : _node->ToDeclaration() );
    }

private:
    const XMLNode* _node;
};

/**
    Printing functionality. The XMLPrinter gives you more
    options than the XMLDocument::Print() method.

    It can:
    -# Print to memory.
    -# Print to a file you provide.
    -# Print XML without a XMLDocument.

    Print to Memory

    @verbatim
    XMLPrinter printer;
    doc.Print( &printer );
    SomeFunction( printer.CStr() );
    @endverbatim

    Print to a File

    You provide the file pointer.
    @verbatim
    XMLPrinter printer( fp );
    doc.Print( &printer );
    @endverbatim

    Print without a XMLDocument

    When loading, an XML parser is very useful. However, sometimes
    when saving, it just gets in the way. The code is often set up
    for streaming, and constructing the DOM is just overhead.

    The Printer supports the streaming case. The following code
    prints out a trivially simple XML file without ever creating
    an XML document.

    @verbatim
    XMLPrinter printer( fp );
    printer.OpenElement( "foo" );
    printer.PushAttribute( "foo", "bar" );
    printer.CloseElement();
    @endverbatim
*/
class TINYXML2_LIB XMLPrinter : public XMLVisitor
{
public:
    /** Construct the printer. If the FILE* is specified,
        this will print to the FILE. Else it will print
        to memory, and the result is available in CStr().

        If 'compact' is set to true, then output is created
        with only required whitespace and newlines.

    */
    XMLPrinter( FILE* file=0, bool compact = false, int depth = 0 );
    virtual ~XMLPrinter()   {}

    /** If streaming, write the BOM and declaration. */
    void PushHeader( bool writeBOM, bool writeDeclaration );
    /** If streaming, start writing an element.

        The element must be closed with CloseElement()
    */
    void OpenElement( const char* name, bool compactMode=false );
    /// If streaming, add an attribute to an open element.

    void PushAttribute( const char* name, const char* value );
    void PushAttribute( const char* name, int value );
    void PushAttribute( const char* name, unsigned value );
    void PushAttribute( const char* name, bool value );
    void PushAttribute( const char* name, double value );
    /// If streaming, close the Element.

    virtual void CloseElement( bool compactMode=false );

    /// Add a text node.

    void PushText( const char* text, bool cdata=false );
    /// Add a text node from an integer.

    void PushText( int value );
    /// Add a text node from an unsigned.

    void PushText( unsigned value );
    /// Add a text node from a bool.

    void PushText( bool value );
    /// Add a text node from a float.

    void PushText( float value );
    /// Add a text node from a double.

    void PushText( double value );

    /// Add a comment
    void PushComment( const char* comment );

    void PushDeclaration( const char* value );
    void PushUnknown( const char* value );

    virtual bool VisitEnter( const XMLDocument& /*doc*/ );
    virtual bool VisitExit( const XMLDocument& /*doc*/ )            {
        return true;
    }

    virtual bool VisitEnter( const XMLElement& element, const XMLAttribute* attribute );
    virtual bool VisitExit( const XMLElement& element );

    virtual bool Visit( const XMLText& text );
    virtual bool Visit( const XMLComment& comment );
    virtual bool Visit( const XMLDeclaration& declaration );
    virtual bool Visit( const XMLUnknown& unknown );

    /**
        If in print to memory mode, return a pointer to
        the XML file in memory.

    */
    const char* CStr() const {
        return _buffer.Mem();
    }
    /**
        If in print to memory mode, return the size
        of the XML file in memory. (Note the size returned
        includes the terminating null.)
    */
    int CStrSize() const {
        return _buffer.Size();
    }
    /**
        If in print to memory mode, reset the buffer to the
        beginning.

    */
    void ClearBuffer() {
        _buffer.Clear();
        _buffer.Push(0);
    }

protected:
    virtual bool CompactMode( const XMLElement& )   { return _compactMode; }

    /** Prints out the space before an element. You may override to change
        the space and tabs used. A PrintSpace() override should call Print().
    */
    virtual void PrintSpace( int depth );
    void Print( const char* format, ... );

    void SealElementIfJustOpened();
    bool _elementJustOpened;
    DynArray< const char*, 10 > _stack;

private:
    void PrintString( const char*, bool restrictedEntitySet );  // prints out, after detecting entities.

    bool _firstElement;
    FILE* _fp;
    int _depth;
    int _textDepth;
    bool _processEntities;
    bool _compactMode;

    enum {
        ENTITY_RANGE = 64,
        BUF_SIZE = 200
    };
    bool _entityFlag[ENTITY_RANGE];
    bool _restrictedEntityFlag[ENTITY_RANGE];

    DynArray< char, 20 > _buffer;
};

}   // tinyxml2

#if defined(_MSC_VER)
  pragma warning(pop)
#endif

#endif // TINYXML2_INCLUDED
*>*>*>*>*>*>;>*>

tinyxml2.cpp

/*
Original code by 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.

*/

#include "tinyxml2.h"

#include       // yes, this one new style header, is in the Android SDK.

#if defined(ANDROID_NDK) || defined(__QNXNTO__)
  include 
#else
  include 
#endif

static const char LINE_FEED             = (char)0x0a;           // all line endings are normalized to LF
static const char LF = LINE_FEED;
static const char CARRIAGE_RETURN       = (char)0x0d;           // CR gets filtered out
static const char CR = CARRIAGE_RETURN;
static const char SINGLE_QUOTE          = '\'';
static const char DOUBLE_QUOTE          = '\"';

// Bunch of unicode info at:
//      http://www.unicode.org/faq/utf_bom.html
//  ef bb bf (Microsoft "lead bytes") - designates UTF-8

static const unsigned char TIXML_UTF_LEAD_0 = 0xefU;
static const unsigned char TIXML_UTF_LEAD_1 = 0xbbU;
static const unsigned char TIXML_UTF_LEAD_2 = 0xbfU;

namespace tinyxml2
{

struct Entity {
    const char* pattern;
    int length;
    char value;
};

static const int NUM_ENTITIES = 5;
static const Entity entities[NUM_ENTITIES] = {
    { "quot", 4,  DOUBLE_QUOTE },
    { "amp", 3,       '&'  },
    { "apos", 4,  SINGLE_QUOTE },
    { "lt",   2,      ''  }
};

StrPair::~StrPair()
{
    Reset();
}

void StrPair::TransferTo( StrPair* other )
{
    if ( this == other ) {
        return;
    }
    // This in effect implements the assignment operator by "moving"
    // ownership (as in auto_ptr).

    TIXMLASSERT( other->_flags == 0 );
    TIXMLASSERT( other->_start == 0 );
    TIXMLASSERT( other->_end == 0 );

    other->Reset();

    other->_flags = _flags;
    other->_start = _start;
    other->_end = _end;

    _flags = 0;
    _start = 0;
    _end = 0;
}

void StrPair::Reset()
{
    if ( _flags & NEEDS_DELETE ) {
        delete [] _start;
    }
    _flags = 0;
    _start = 0;
    _end = 0;
}

void StrPair::SetStr( const char* str, int flags )
{
    Reset();
    size_t len = strlen( str );
    _start = new char[ len+1 ];
    memcpy( _start, str, len+1 );
    _end = _start + len;
    _flags = flags | NEEDS_DELETE;
}

char* StrPair::ParseText( char* p, const char* endTag, int strFlags )
{
    TIXMLASSERT( endTag && *endTag );

    char* start = p;
    char  endChar = *endTag;
    size_t length = strlen( endTag );

    // Inner loop of text parsing.

    while ( *p ) {
        if ( *p == endChar && strncmp( p, endTag, length ) == 0 ) {
            Set( start, p, strFlags );
            return p + length;
        }
        ++p;
    }
    return 0;
}

char* StrPair::ParseName( char* p )
{
    if ( !p || !(*p) ) {
        return 0;
    }
    if ( !XMLUtil::IsNameStartChar( *p ) ) {
        return 0;
    }

    char* const start = p;
    ++p;
    while ( *p && XMLUtil::IsNameChar( *p ) ) {
        ++p;
    }

    Set( start, p, 0 );
    return p;
}

void StrPair::CollapseWhitespace()
{
    // Adjusting _start would cause undefined behavior on delete[]
    TIXMLASSERT( ( _flags & NEEDS_DELETE ) == 0 );
    // Trim leading space.

    _start = XMLUtil::SkipWhiteSpace( _start );

    if ( *_start ) {
        char* p = _start;   // the read pointer
        char* q = _start;   // the write pointer

        while( *p ) {
            if ( XMLUtil::IsWhiteSpace( *p )) {
                p = XMLUtil::SkipWhiteSpace( p );
                if ( *p == 0 ) {
                    break;    // don't write to q; this trims the trailing space.

                }
                *q = ' ';
                ++q;
            }
            *q = *p;
            ++q;
            ++p;
        }
        *q = 0;
    }
}

const char* StrPair::GetStr()
{
    TIXMLASSERT( _start );
    TIXMLASSERT( _end );
    if ( _flags & NEEDS_FLUSH ) {
        *_end = 0;
        _flags ^= NEEDS_FLUSH;

        if ( _flags ) {
            char* p = _start;   // the read pointer
            char* q = _start;   // the write pointer

            while( p < _end ) {
                if ( (_flags & NEEDS_NEWLINE_NORMALIZATION) && *p == CR ) {
                    // CR-LF pair becomes LF
                    // CR alone becomes LF
                    // LF-CR becomes LF
                    if ( *(p+1) == LF ) {
                        p += 2;
                    }
                    else {
                        ++p;
                    }
                    *q++ = LF;
                }
                else if ( (_flags & NEEDS_NEWLINE_NORMALIZATION) && *p == LF ) {
                    if ( *(p+1) == CR ) {
                        p += 2;
                    }
                    else {
                        ++p;
                    }
                    *q++ = LF;
                }
                else if ( (_flags & NEEDS_ENTITY_PROCESSING) && *p == '&' ) {
                    // Entities handled by tinyXML2:
                    // - special entities in the entity table [in/out]
                    // - numeric character reference [in]
                    //   中 or 中

                    if ( *(p+1) == '#' ) {
                        const int buflen = 10;
                        char buf[buflen] = { 0 };
                        int len = 0;
                        char* adjusted = const_cast( XMLUtil::GetCharacterRef( p, buf, &len ) );
                        if ( adjusted == 0 ) {
                            *q = *p;
                            ++p;
                            ++q;
                        }
                        else {
                            TIXMLASSERT( 0 (p);
    // Check for BOM:
    if (    *(pu+0) == TIXML_UTF_LEAD_0
            && *(pu+1) == TIXML_UTF_LEAD_1
            && *(pu+2) == TIXML_UTF_LEAD_2 ) {
        *bom = true;
        p += 3;
    }
    TIXMLASSERT( p );
    return p;
}

void XMLUtil::ConvertUTF32ToUTF8( unsigned long input, char* output, int* length )
{
    const unsigned long BYTE_MASK = 0xBF;
    const unsigned long BYTE_MARK = 0x80;
    const unsigned long FIRST_BYTE_MARK[7] = { 0x00, 0x00, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC };

    if (input < 0x80) {
        *length = 1;
    }
    else if ( input < 0x800 ) {
        *length = 2;
    }
    else if ( input < 0x10000 ) {
        *length = 3;
    }
    else if ( input < 0x200000 ) {
        *length = 4;
    }
    else {
        *length = 0;    // This code won't convert this correctly anyway.

        return;
    }

    output += *length;

    // Scary scary fall throughs.

    switch (*length) {
        case 4:
            --output;
            *output = (char)((input | BYTE_MARK) & BYTE_MASK);
            input >>= 6;
        case 3:
            --output;
            *output = (char)((input | BYTE_MARK) & BYTE_MASK);
            input >>= 6;
        case 2:
            --output;
            *output = (char)((input | BYTE_MARK) & BYTE_MASK);
            input >>= 6;
        case 1:
            --output;
            *output = (char)(input | FIRST_BYTE_MARK[*length]);
            break;
        default:
            TIXMLASSERT( false );
    }
}

const char* XMLUtil::GetCharacterRef( const char* p, char* value, int* length )
{
    // Presume an entity, and pull it out.

    *length = 0;

    if ( *(p+1) == '#' && *(p+2) ) {
        unsigned long ucs = 0;
        TIXMLASSERT( sizeof( ucs ) >= 4 );
        ptrdiff_t delta = 0;
        unsigned mult = 1;
        static const char SEMICOLON = ';';

        if ( *(p+2) == 'x' ) {
            // Hexadecimal.

            const char* q = p+3;
            if ( !(*q) ) {
                return 0;
            }

            q = strchr( q, SEMICOLON );

            if ( !q ) {
                return 0;
            }
            TIXMLASSERT( *q == SEMICOLON );

            delta = q-p;
            --q;

            while ( *q != 'x' ) {
                unsigned int digit = 0;

                if ( *q >= '0' && *q = 'a' && *q = 'A' && *q = 0 && digit < 16);
                TIXMLASSERT( digit == 0 || mult = '0' && *q = 0 && digit < 10);
                    TIXMLASSERT( digit == 0 || mult _memPool = &_commentPool;
        p += xmlHeaderLen;
    }
    else if ( XMLUtil::StringEqual( p, commentHeader, commentHeaderLen ) ) {
        TIXMLASSERT( sizeof( XMLComment ) == _commentPool.ItemSize() );
        returnNode = new (_commentPool.Alloc()) XMLComment( this );
        returnNode->_memPool = &_commentPool;
        p += commentHeaderLen;
    }
    else if ( XMLUtil::StringEqual( p, cdataHeader, cdataHeaderLen ) ) {
        TIXMLASSERT( sizeof( XMLText ) == _textPool.ItemSize() );
        XMLText* text = new (_textPool.Alloc()) XMLText( this );
        returnNode = text;
        returnNode->_memPool = &_textPool;
        p += cdataHeaderLen;
        text->SetCData( true );
    }
    else if ( XMLUtil::StringEqual( p, dtdHeader, dtdHeaderLen ) ) {
        TIXMLASSERT( sizeof( XMLUnknown ) == _commentPool.ItemSize() );
        returnNode = new (_commentPool.Alloc()) XMLUnknown( this );
        returnNode->_memPool = &_commentPool;
        p += dtdHeaderLen;
    }
    else if ( XMLUtil::StringEqual( p, elementHeader, elementHeaderLen ) ) {
        TIXMLASSERT( sizeof( XMLElement ) == _elementPool.ItemSize() );
        returnNode = new (_elementPool.Alloc()) XMLElement( this );
        returnNode->_memPool = &_elementPool;
        p += elementHeaderLen;
    }
    else {
        TIXMLASSERT( sizeof( XMLText ) == _textPool.ItemSize() );
        returnNode = new (_textPool.Alloc()) XMLText( this );
        returnNode->_memPool = &_textPool;
        p = start;  // Back it up, all the text counts.

    }

    TIXMLASSERT( returnNode );
    TIXMLASSERT( p );
    *node = returnNode;
    return p;
}

bool XMLDocument::Accept( XMLVisitor* visitor ) const
{
    TIXMLASSERT( visitor );
    if ( visitor->VisitEnter( *this ) ) {
        for ( const XMLNode* node=FirstChild(); node; node=node->NextSibling() ) {
            if ( !node->Accept( visitor ) ) {
                break;
            }
        }
    }
    return visitor->VisitExit( *this );
}

// --------- XMLNode ----------- //

XMLNode::XMLNode( XMLDocument* doc ) :
    _document( doc ),
    _parent( 0 ),
    _firstChild( 0 ), _lastChild( 0 ),
    _prev( 0 ), _next( 0 ),
    _memPool( 0 )
{
}

XMLNode::~XMLNode()
{
    DeleteChildren();
    if ( _parent ) {
        _parent->Unlink( this );
    }
}

const char* XMLNode::Value() const
{
    return _value.GetStr();
}

void XMLNode::SetValue( const char* str, bool staticMem )
{
    if ( staticMem ) {
        _value.SetInternedStr( str );
    }
    else {
        _value.SetStr( str );
    }
}

void XMLNode::DeleteChildren()
{
    while( _firstChild ) {
        TIXMLASSERT( _lastChild );
        TIXMLASSERT( _firstChild->_document == _document );
        XMLNode* node = _firstChild;
        Unlink( node );

        DeleteNode( node );
    }
    _firstChild = _lastChild = 0;
}

void XMLNode::Unlink( XMLNode* child )
{
    TIXMLASSERT( child );
    TIXMLASSERT( child->_document == _document );
    TIXMLASSERT( child->_parent == this );
    if ( child == _firstChild ) {
        _firstChild = _firstChild->_next;
    }
    if ( child == _lastChild ) {
        _lastChild = _lastChild->_prev;
    }

    if ( child->_prev ) {
        child->_prev->_next = child->_next;
    }
    if ( child->_next ) {
        child->_next->_prev = child->_prev;
    }
    child->_parent = 0;
}

void XMLNode::DeleteChild( XMLNode* node )
{
    TIXMLASSERT( node );
    TIXMLASSERT( node->_document == _document );
    TIXMLASSERT( node->_parent == this );
    DeleteNode( node );
}

XMLNode* XMLNode::InsertEndChild( XMLNode* addThis )
{
    TIXMLASSERT( addThis );
    if ( addThis->_document != _document ) {
        TIXMLASSERT( false );
        return 0;
    }
    InsertChildPreamble( addThis );

    if ( _lastChild ) {
        TIXMLASSERT( _firstChild );
        TIXMLASSERT( _lastChild->_next == 0 );
        _lastChild->_next = addThis;
        addThis->_prev = _lastChild;
        _lastChild = addThis;

        addThis->_next = 0;
    }
    else {
        TIXMLASSERT( _firstChild == 0 );
        _firstChild = _lastChild = addThis;

        addThis->_prev = 0;
        addThis->_next = 0;
    }
    addThis->_parent = this;
    return addThis;
}

XMLNode* XMLNode::InsertFirstChild( XMLNode* addThis )
{
    TIXMLASSERT( addThis );
    if ( addThis->_document != _document ) {
        TIXMLASSERT( false );
        return 0;
    }
    InsertChildPreamble( addThis );

    if ( _firstChild ) {
        TIXMLASSERT( _lastChild );
        TIXMLASSERT( _firstChild->_prev == 0 );

        _firstChild->_prev = addThis;
        addThis->_next = _firstChild;
        _firstChild = addThis;

        addThis->_prev = 0;
    }
    else {
        TIXMLASSERT( _lastChild == 0 );
        _firstChild = _lastChild = addThis;

        addThis->_prev = 0;
        addThis->_next = 0;
    }
    addThis->_parent = this;
    return addThis;
}

XMLNode* XMLNode::InsertAfterChild( XMLNode* afterThis, XMLNode* addThis )
{
    TIXMLASSERT( addThis );
    if ( addThis->_document != _document ) {
        TIXMLASSERT( false );
        return 0;
    }

    TIXMLASSERT( afterThis );

    if ( afterThis->_parent != this ) {
        TIXMLASSERT( false );
        return 0;
    }

    if ( afterThis->_next == 0 ) {
        // The last node or the only node.

        return InsertEndChild( addThis );
    }
    InsertChildPreamble( addThis );
    addThis->_prev = afterThis;
    addThis->_next = afterThis->_next;
    afterThis->_next->_prev = addThis;
    afterThis->_next = addThis;
    addThis->_parent = this;
    return addThis;
}

const XMLElement* XMLNode::FirstChildElement( const char* value ) const
{
    for( const XMLNode* node = _firstChild; node; node = node->_next ) {
        const XMLElement* element = node->ToElement();
        if ( element ) {
            if ( !value || XMLUtil::StringEqual( element->Name(), value ) ) {
                return element;
            }
        }
    }
    return 0;
}

const XMLElement* XMLNode::LastChildElement( const char* value ) const
{
    for( const XMLNode* node = _lastChild; node; node = node->_prev ) {
        const XMLElement* element = node->ToElement();
        if ( element ) {
            if ( !value || XMLUtil::StringEqual( element->Name(), value ) ) {
                return element;
            }
        }
    }
    return 0;
}

const XMLElement* XMLNode::NextSiblingElement( const char* value ) const
{
    for( const XMLNode* node = _next; node; node = node->_next ) {
        const XMLElement* element = node->ToElement();
        if ( element
                && (!value || XMLUtil::StringEqual( value, node->Value() ))) {
            return element;
        }
    }
    return 0;
}

const XMLElement* XMLNode::PreviousSiblingElement( const char* value ) const
{
    for( const XMLNode* node = _prev; node; node = node->_prev ) {
        const XMLElement* element = node->ToElement();
        if ( element
                && (!value || XMLUtil::StringEqual( value, node->Value() ))) {
            return element;
        }
    }
    return 0;
}

char* XMLNode::ParseDeep( char* p, StrPair* parentEnd )
{
    // This is a recursive method, but thinking about it "at the current level"
    // it is a pretty simple flat list:
    //      
    //      
    //
    // With a special case:
    //      
    //      
    //      
    //
    // Where the closing element (/foo) *must* be the next thing after the opening
    // element, and the names must match. BUT the tricky bit is that the closing
    // element will be read by the child.

    //
    // 'endTag' is the end tag for this node, it is returned by a call to a child.

    // 'parentEnd' is the end tag for the parent, which is filled in and returned.

    while( p && *p ) {
        XMLNode* node = 0;

        p = _document->Identify( p, &node );
        if ( node == 0 ) {
            break;
        }

        StrPair endTag;
        p = node->ParseDeep( p, &endTag );
        if ( !p ) {
            DeleteNode( node );
            if ( !_document->Error() ) {
                _document->SetError( XML_ERROR_PARSING, 0, 0 );
            }
            break;
        }

        XMLElement* ele = node->ToElement();
        if ( ele ) {
            // We read the end tag. Return it to the parent.

            if ( ele->ClosingType() == XMLElement::CLOSING ) {
                if ( parentEnd ) {
                    ele->_value.TransferTo( parentEnd );
                }
                node->_memPool->SetTracked();   // created and then immediately deleted.

                DeleteNode( node );
                return p;
            }

            // Handle an end tag returned to this level.

            // And handle a bunch of annoying errors.

            bool mismatch = false;
            if ( endTag.Empty() ) {
                if ( ele->ClosingType() == XMLElement::OPEN ) {
                    mismatch = true;
                }
            }
            else {
                if ( ele->ClosingType() != XMLElement::OPEN ) {
                    mismatch = true;
                }
                else if ( !XMLUtil::StringEqual( endTag.GetStr(), node->Value() ) ) {
                    mismatch = true;
                }
            }
            if ( mismatch ) {
                _document->SetError( XML_ERROR_MISMATCHED_ELEMENT, node->Value(), 0 );
                DeleteNode( node );
                break;
            }
        }
        InsertEndChild( node );
    }
    return 0;
}

void XMLNode::DeleteNode( XMLNode* node )
{
    if ( node == 0 ) {
        return;
    }
    MemPool* pool = node->_memPool;
    node->~XMLNode();
    pool->Free( node );
}

void XMLNode::InsertChildPreamble( XMLNode* insertThis ) const
{
    TIXMLASSERT( insertThis );
    TIXMLASSERT( insertThis->_document == _document );

    if ( insertThis->_parent )
        insertThis->_parent->Unlink( insertThis );
    else
        insertThis->_memPool->SetTracked();
}

// --------- XMLText ---------- //
char* XMLText::ParseDeep( char* p, StrPair* )
{
    const char* start = p;
    if ( this->CData() ) {
        p = _value.ParseText( p, "]]>", StrPair::NEEDS_NEWLINE_NORMALIZATION );
        if ( !p ) {
            _document->SetError( XML_ERROR_PARSING_CDATA, start, 0 );
        }
        return p;
    }
    else {
        int flags = _document->ProcessEntities() ? StrPair::TEXT_ELEMENT : StrPair::TEXT_ELEMENT_LEAVE_ENTITIES;
        if ( _document->WhitespaceMode() == COLLAPSE_WHITESPACE ) {
            flags |= StrPair::COLLAPSE_WHITESPACE;
        }

        p = _value.ParseText( p, "SetError( XML_ERROR_PARSING_TEXT, start, 0 );
        }
    }
    return 0;
}

XMLNode* XMLText::ShallowClone( XMLDocument* doc ) const
{
    if ( !doc ) {
        doc = _document;
    }
    XMLText* text = doc->NewText( Value() ); // fixme: this will always allocate memory. Intern?

    text->SetCData( this->CData() );
    return text;
}

bool XMLText::ShallowEqual( const XMLNode* compare ) const
{
    const XMLText* text = compare->ToText();
    return ( text && XMLUtil::StringEqual( text->Value(), Value() ) );
}

bool XMLText::Accept( XMLVisitor* visitor ) const
{
    TIXMLASSERT( visitor );
    return visitor->Visit( *this );
}

// --------- XMLComment ---------- //

XMLComment::XMLComment( XMLDocument* doc ) : XMLNode( doc )
{
}

XMLComment::~XMLComment()
{
}

char* XMLComment::ParseDeep( char* p, StrPair* )
{
    // Comment parses as text.

    const char* start = p;
    p = _value.ParseText( p, "-->", StrPair::COMMENT );
    if ( p == 0 ) {
        _document->SetError( XML_ERROR_PARSING_COMMENT, start, 0 );
    }
    return p;
}

XMLNode* XMLComment::ShallowClone( XMLDocument* doc ) const
{
    if ( !doc ) {
        doc = _document;
    }
    XMLComment* comment = doc->NewComment( Value() );    // fixme: this will always allocate memory. Intern?

    return comment;
}

bool XMLComment::ShallowEqual( const XMLNode* compare ) const
{
    TIXMLASSERT( compare );
    const XMLComment* comment = compare->ToComment();
    return ( comment && XMLUtil::StringEqual( comment->Value(), Value() ));
}

bool XMLComment::Accept( XMLVisitor* visitor ) const
{
    TIXMLASSERT( visitor );
    return visitor->Visit( *this );
}

// --------- XMLDeclaration ---------- //

XMLDeclaration::XMLDeclaration( XMLDocument* doc ) : XMLNode( doc )
{
}

XMLDeclaration::~XMLDeclaration()
{
    //printf( "~XMLDeclaration\n" );
}

char* XMLDeclaration::ParseDeep( char* p, StrPair* )
{
    // Declaration parses as text.

    const char* start = p;
    p = _value.ParseText( p, "?>", StrPair::NEEDS_NEWLINE_NORMALIZATION );
    if ( p == 0 ) {
        _document->SetError( XML_ERROR_PARSING_DECLARATION, start, 0 );
    }
    return p;
}

XMLNode* XMLDeclaration::ShallowClone( XMLDocument* doc ) const
{
    if ( !doc ) {
        doc = _document;
    }
    XMLDeclaration* dec = doc->NewDeclaration( Value() );    // fixme: this will always allocate memory. Intern?

    return dec;
}

bool XMLDeclaration::ShallowEqual( const XMLNode* compare ) const
{
    TIXMLASSERT( compare );
    const XMLDeclaration* declaration = compare->ToDeclaration();
    return ( declaration && XMLUtil::StringEqual( declaration->Value(), Value() ));
}

bool XMLDeclaration::Accept( XMLVisitor* visitor ) const
{
    TIXMLASSERT( visitor );
    return visitor->Visit( *this );
}

// --------- XMLUnknown ---------- //

XMLUnknown::XMLUnknown( XMLDocument* doc ) : XMLNode( doc )
{
}

XMLUnknown::~XMLUnknown()
{
}

char* XMLUnknown::ParseDeep( char* p, StrPair* )
{
    // Unknown parses as text.

    const char* start = p;

    p = _value.ParseText( p, ">", StrPair::NEEDS_NEWLINE_NORMALIZATION );
    if ( !p ) {
        _document->SetError( XML_ERROR_PARSING_UNKNOWN, start, 0 );
    }
    return p;
}

XMLNode* XMLUnknown::ShallowClone( XMLDocument* doc ) const
{
    if ( !doc ) {
        doc = _document;
    }
    XMLUnknown* text = doc->NewUnknown( Value() );   // fixme: this will always allocate memory. Intern?

    return text;
}

bool XMLUnknown::ShallowEqual( const XMLNode* compare ) const
{
    TIXMLASSERT( compare );
    const XMLUnknown* unknown = compare->ToUnknown();
    return ( unknown && XMLUtil::StringEqual( unknown->Value(), Value() ));
}

bool XMLUnknown::Accept( XMLVisitor* visitor ) const
{
    TIXMLASSERT( visitor );
    return visitor->Visit( *this );
}

// --------- XMLAttribute ---------- //

const char* XMLAttribute::Name() const
{
    return _name.GetStr();
}

const char* XMLAttribute::Value() const
{
    return _value.GetStr();
}

char* XMLAttribute::ParseDeep( char* p, bool processEntities )
{
    // Parse using the name rules: bug fix, was using ParseText before
    p = _name.ParseName( p );
    if ( !p || !*p ) {
        return 0;
    }

    // Skip white space before =
    p = XMLUtil::SkipWhiteSpace( p );
    if ( *p != '=' ) {
        return 0;
    }

    ++p;    // move up to opening quote
    p = XMLUtil::SkipWhiteSpace( p );
    if ( *p != '\"' && *p != '\'' ) {
        return 0;
    }

    char endTag[2] = { *p, 0 };
    ++p;    // move past opening quote

    p = _value.ParseText( p, endTag, processEntities ? StrPair::ATTRIBUTE_VALUE : StrPair::ATTRIBUTE_VALUE_LEAVE_ENTITIES );
    return p;
}

void XMLAttribute::SetName( const char* n )
{
    _name.SetStr( n );
}

XMLError XMLAttribute::QueryIntValue( int* value ) const
{
    if ( XMLUtil::ToInt( Value(), value )) {
        return XML_NO_ERROR;
    }
    return XML_WRONG_ATTRIBUTE_TYPE;
}

XMLError XMLAttribute::QueryUnsignedValue( unsigned int* value ) const
{
    if ( XMLUtil::ToUnsigned( Value(), value )) {
        return XML_NO_ERROR;
    }
    return XML_WRONG_ATTRIBUTE_TYPE;
}

XMLError XMLAttribute::QueryBoolValue( bool* value ) const
{
    if ( XMLUtil::ToBool( Value(), value )) {
        return XML_NO_ERROR;
    }
    return XML_WRONG_ATTRIBUTE_TYPE;
}

XMLError XMLAttribute::QueryFloatValue( float* value ) const
{
    if ( XMLUtil::ToFloat( Value(), value )) {
        return XML_NO_ERROR;
    }
    return XML_WRONG_ATTRIBUTE_TYPE;
}

XMLError XMLAttribute::QueryDoubleValue( double* value ) const
{
    if ( XMLUtil::ToDouble( Value(), value )) {
        return XML_NO_ERROR;
    }
    return XML_WRONG_ATTRIBUTE_TYPE;
}

void XMLAttribute::SetAttribute( const char* v )
{
    _value.SetStr( v );
}

void XMLAttribute::SetAttribute( int v )
{
    char buf[BUF_SIZE];
    XMLUtil::ToStr( v, buf, BUF_SIZE );
    _value.SetStr( buf );
}

void XMLAttribute::SetAttribute( unsigned v )
{
    char buf[BUF_SIZE];
    XMLUtil::ToStr( v, buf, BUF_SIZE );
    _value.SetStr( buf );
}

void XMLAttribute::SetAttribute( bool v )
{
    char buf[BUF_SIZE];
    XMLUtil::ToStr( v, buf, BUF_SIZE );
    _value.SetStr( buf );
}

void XMLAttribute::SetAttribute( double v )
{
    char buf[BUF_SIZE];
    XMLUtil::ToStr( v, buf, BUF_SIZE );
    _value.SetStr( buf );
}

void XMLAttribute::SetAttribute( float v )
{
    char buf[BUF_SIZE];
    XMLUtil::ToStr( v, buf, BUF_SIZE );
    _value.SetStr( buf );
}

// --------- XMLElement ---------- //
XMLElement::XMLElement( XMLDocument* doc ) : XMLNode( doc ),
    _closingType( 0 ),
    _rootAttribute( 0 )
{
}

XMLElement::~XMLElement()
{
    while( _rootAttribute ) {
        XMLAttribute* next = _rootAttribute->_next;
        DeleteAttribute( _rootAttribute );
        _rootAttribute = next;
    }
}

const XMLAttribute* XMLElement::FindAttribute( const char* name ) const
{
    for( XMLAttribute* a = _rootAttribute; a; a = a->_next ) {
        if ( XMLUtil::StringEqual( a->Name(), name ) ) {
            return a;
        }
    }
    return 0;
}

const char* XMLElement::Attribute( const char* name, const char* value ) const
{
    const XMLAttribute* a = FindAttribute( name );
    if ( !a ) {
        return 0;
    }
    if ( !value || XMLUtil::StringEqual( a->Value(), value )) {
        return a->Value();
    }
    return 0;
}

const char* XMLElement::GetText() const
{
    if ( FirstChild() && FirstChild()->ToText() ) {
        return FirstChild()->Value();
    }
    return 0;
}

void    XMLElement::SetText( const char* inText )
{
    if ( FirstChild() && FirstChild()->ToText() )
        FirstChild()->SetValue( inText );
    else {
        XMLText*    theText = GetDocument()->NewText( inText );
        InsertFirstChild( theText );
    }
}

void XMLElement::SetText( int v )
{
    char buf[BUF_SIZE];
    XMLUtil::ToStr( v, buf, BUF_SIZE );
    SetText( buf );
}

void XMLElement::SetText( unsigned v )
{
    char buf[BUF_SIZE];
    XMLUtil::ToStr( v, buf, BUF_SIZE );
    SetText( buf );
}

void XMLElement::SetText( bool v )
{
    char buf[BUF_SIZE];
    XMLUtil::ToStr( v, buf, BUF_SIZE );
    SetText( buf );
}

void XMLElement::SetText( float v )
{
    char buf[BUF_SIZE];
    XMLUtil::ToStr( v, buf, BUF_SIZE );
    SetText( buf );
}

void XMLElement::SetText( double v )
{
    char buf[BUF_SIZE];
    XMLUtil::ToStr( v, buf, BUF_SIZE );
    SetText( buf );
}

XMLError XMLElement::QueryIntText( int* ival ) const
{
    if ( FirstChild() && FirstChild()->ToText() ) {
        const char* t = FirstChild()->Value();
        if ( XMLUtil::ToInt( t, ival ) ) {
            return XML_SUCCESS;
        }
        return XML_CAN_NOT_CONVERT_TEXT;
    }
    return XML_NO_TEXT_NODE;
}

XMLError XMLElement::QueryUnsignedText( unsigned* uval ) const
{
    if ( FirstChild() && FirstChild()->ToText() ) {
        const char* t = FirstChild()->Value();
        if ( XMLUtil::ToUnsigned( t, uval ) ) {
            return XML_SUCCESS;
        }
        return XML_CAN_NOT_CONVERT_TEXT;
    }
    return XML_NO_TEXT_NODE;
}

XMLError XMLElement::QueryBoolText( bool* bval ) const
{
    if ( FirstChild() && FirstChild()->ToText() ) {
        const char* t = FirstChild()->Value();
        if ( XMLUtil::ToBool( t, bval ) ) {
            return XML_SUCCESS;
        }
        return XML_CAN_NOT_CONVERT_TEXT;
    }
    return XML_NO_TEXT_NODE;
}

XMLError XMLElement::QueryDoubleText( double* dval ) const
{
    if ( FirstChild() && FirstChild()->ToText() ) {
        const char* t = FirstChild()->Value();
        if ( XMLUtil::ToDouble( t, dval ) ) {
            return XML_SUCCESS;
        }
        return XML_CAN_NOT_CONVERT_TEXT;
    }
    return XML_NO_TEXT_NODE;
}

XMLError XMLElement::QueryFloatText( float* fval ) const
{
    if ( FirstChild() && FirstChild()->ToText() ) {
        const char* t = FirstChild()->Value();
        if ( XMLUtil::ToFloat( t, fval ) ) {
            return XML_SUCCESS;
        }
        return XML_CAN_NOT_CONVERT_TEXT;
    }
    return XML_NO_TEXT_NODE;
}

XMLAttribute* XMLElement::FindOrCreateAttribute( const char* name )
{
    XMLAttribute* last = 0;
    XMLAttribute* attrib = 0;
    for( attrib = _rootAttribute;
            attrib;
            last = attrib, attrib = attrib->_next ) {
        if ( XMLUtil::StringEqual( attrib->Name(), name ) ) {
            break;
        }
    }
    if ( !attrib ) {
        TIXMLASSERT( sizeof( XMLAttribute ) == _document->_attributePool.ItemSize() );
        attrib = new (_document->_attributePool.Alloc() ) XMLAttribute();
        attrib->_memPool = &_document->_attributePool;
        if ( last ) {
            last->_next = attrib;
        }
        else {
            _rootAttribute = attrib;
        }
        attrib->SetName( name );
        attrib->_memPool->SetTracked(); // always created and linked.

    }
    return attrib;
}

void XMLElement::DeleteAttribute( const char* name )
{
    XMLAttribute* prev = 0;
    for( XMLAttribute* a=_rootAttribute; a; a=a->_next ) {
        if ( XMLUtil::StringEqual( name, a->Name() ) ) {
            if ( prev ) {
                prev->_next = a->_next;
            }
            else {
                _rootAttribute = a->_next;
            }
            DeleteAttribute( a );
            break;
        }
        prev = a;
    }
}

char* XMLElement::ParseAttributes( char* p )
{
    const char* start = p;
    XMLAttribute* prevAttribute = 0;

    // Read the attributes.

    while( p ) {
        p = XMLUtil::SkipWhiteSpace( p );
        if ( !(*p) ) {
            _document->SetError( XML_ERROR_PARSING_ELEMENT, start, Name() );
            return 0;
        }

        // attribute.

        if (XMLUtil::IsNameStartChar( *p ) ) {
            TIXMLASSERT( sizeof( XMLAttribute ) == _document->_attributePool.ItemSize() );
            XMLAttribute* attrib = new (_document->_attributePool.Alloc() ) XMLAttribute();
            attrib->_memPool = &_document->_attributePool;
            attrib->_memPool->SetTracked();

            p = attrib->ParseDeep( p, _document->ProcessEntities() );
            if ( !p || Attribute( attrib->Name() ) ) {
                DeleteAttribute( attrib );
                _document->SetError( XML_ERROR_PARSING_ATTRIBUTE, start, p );
                return 0;
            }
            // There is a minor bug here: if the attribute in the source xml
            // document is duplicated, it will not be detected and the
            // attribute will be doubly added. However, tracking the 'prevAttribute'
            // avoids re-scanning the attribute list. Preferring performance for
            // now, may reconsider in the future.

            if ( prevAttribute ) {
                prevAttribute->_next = attrib;
            }
            else {
                _rootAttribute = attrib;
            }
            prevAttribute = attrib;
        }
        // end of the tag
        else if ( *p == '>' ) {
            ++p;
            break;
        }
        // end of the tag
        else if ( *p == '/' && *(p+1) == '>' ) {
            _closingType = CLOSED;
            return p+2; // done; sealed element.

        }
        else {
            _document->SetError( XML_ERROR_PARSING_ELEMENT, start, p );
            return 0;
        }
    }
    return p;
}

void XMLElement::DeleteAttribute( XMLAttribute* attribute )
{
    if ( attribute == 0 ) {
        return;
    }
    MemPool* pool = attribute->_memPool;
    attribute->~XMLAttribute();
    pool->Free( attribute );
}

//
//  
//  foobar
//
char* XMLElement::ParseDeep( char* p, StrPair* strPair )
{
    // Read the element name.

    p = XMLUtil::SkipWhiteSpace( p );

    // The closing element is the  form. It is
    // parsed just like a regular element then deleted from
    // the DOM.

    if ( *p == '/' ) {
        _closingType = CLOSING;
        ++p;
    }

    p = _value.ParseName( p );
    if ( _value.Empty() ) {
        return 0;
    }

    p = ParseAttributes( p );
    if ( !p || !*p || _closingType ) {
        return p;
    }

    p = XMLNode::ParseDeep( p, strPair );
    return p;
}

XMLNode* XMLElement::ShallowClone( XMLDocument* doc ) const
{
    if ( !doc ) {
        doc = _document;
    }
    XMLElement* element = doc->NewElement( Value() );                    // fixme: this will always allocate memory. Intern?

    for( const XMLAttribute* a=FirstAttribute(); a; a=a->Next() ) {
        element->SetAttribute( a->Name(), a->Value() );                    // fixme: this will always allocate memory. Intern?

    }
    return element;
}

bool XMLElement::ShallowEqual( const XMLNode* compare ) const
{
    TIXMLASSERT( compare );
    const XMLElement* other = compare->ToElement();
    if ( other && XMLUtil::StringEqual( other->Value(), Value() )) {

        const XMLAttribute* a=FirstAttribute();
        const XMLAttribute* b=other->FirstAttribute();

        while ( a && b ) {
            if ( !XMLUtil::StringEqual( a->Value(), b->Value() ) ) {
                return false;
            }
            a = a->Next();
            b = b->Next();
        }
        if ( a || b ) {
            // different count
            return false;
        }
        return true;
    }
    return false;
}

bool XMLElement::Accept( XMLVisitor* visitor ) const
{
    TIXMLASSERT( visitor );
    if ( visitor->VisitEnter( *this, _rootAttribute ) ) {
        for ( const XMLNode* node=FirstChild(); node; node=node->NextSibling() ) {
            if ( !node->Accept( visitor ) ) {
                break;
            }
        }
    }
    return visitor->VisitExit( *this );
}

// --------- XMLDocument ----------- //

// Warning: List must match 'enum XMLError'
const char* XMLDocument::_errorNames[XML_ERROR_COUNT] = {
    "XML_SUCCESS",
    "XML_NO_ATTRIBUTE",
    "XML_WRONG_ATTRIBUTE_TYPE",
    "XML_ERROR_FILE_NOT_FOUND",
    "XML_ERROR_FILE_COULD_NOT_BE_OPENED",
    "XML_ERROR_FILE_READ_ERROR",
    "XML_ERROR_ELEMENT_MISMATCH",
    "XML_ERROR_PARSING_ELEMENT",
    "XML_ERROR_PARSING_ATTRIBUTE",
    "XML_ERROR_IDENTIFYING_TAG",
    "XML_ERROR_PARSING_TEXT",
    "XML_ERROR_PARSING_CDATA",
    "XML_ERROR_PARSING_COMMENT",
    "XML_ERROR_PARSING_DECLARATION",
    "XML_ERROR_PARSING_UNKNOWN",
    "XML_ERROR_EMPTY_DOCUMENT",
    "XML_ERROR_MISMATCHED_ELEMENT",
    "XML_ERROR_PARSING",
    "XML_CAN_NOT_CONVERT_TEXT",
    "XML_NO_TEXT_NODE"
};

XMLDocument::XMLDocument( bool processEntities, Whitespace whitespace ) :
    XMLNode( 0 ),
    _writeBOM( false ),
    _processEntities( processEntities ),
    _errorID( XML_NO_ERROR ),
    _whitespace( whitespace ),
    _errorStr1( 0 ),
    _errorStr2( 0 ),
    _charBuffer( 0 )
{
    _document = this;   // avoid warning about 'this' in initializer list
}

XMLDocument::~XMLDocument()
{
    Clear();
}

void XMLDocument::Clear()
{
    DeleteChildren();

#ifdef DEBUG
    const bool hadError = Error();
#endif
    _errorID = XML_NO_ERROR;
    _errorStr1 = 0;
    _errorStr2 = 0;

    delete [] _charBuffer;
    _charBuffer = 0;

#if 0
    _textPool.Trace( "text" );
    _elementPool.Trace( "element" );
    _commentPool.Trace( "comment" );
    _attributePool.Trace( "attribute" );
#endif

#ifdef DEBUG
    if ( !hadError ) {
        TIXMLASSERT( _elementPool.CurrentAllocs()   == _elementPool.Untracked() );
        TIXMLASSERT( _attributePool.CurrentAllocs() == _attributePool.Untracked() );
        TIXMLASSERT( _textPool.CurrentAllocs()      == _textPool.Untracked() );
        TIXMLASSERT( _commentPool.CurrentAllocs()   == _commentPool.Untracked() );
    }
#endif
}

XMLElement* XMLDocument::NewElement( const char* name )
{
    TIXMLASSERT( sizeof( XMLElement ) == _elementPool.ItemSize() );
    XMLElement* ele = new (_elementPool.Alloc()) XMLElement( this );
    ele->_memPool = &_elementPool;
    ele->SetName( name );
    return ele;
}

XMLComment* XMLDocument::NewComment( const char* str )
{
    TIXMLASSERT( sizeof( XMLComment ) == _commentPool.ItemSize() );
    XMLComment* comment = new (_commentPool.Alloc()) XMLComment( this );
    comment->_memPool = &_commentPool;
    comment->SetValue( str );
    return comment;
}

XMLText* XMLDocument::NewText( const char* str )
{
    TIXMLASSERT( sizeof( XMLText ) == _textPool.ItemSize() );
    XMLText* text = new (_textPool.Alloc()) XMLText( this );
    text->_memPool = &_textPool;
    text->SetValue( str );
    return text;
}

XMLDeclaration* XMLDocument::NewDeclaration( const char* str )
{
    TIXMLASSERT( sizeof( XMLDeclaration ) == _commentPool.ItemSize() );
    XMLDeclaration* dec = new (_commentPool.Alloc()) XMLDeclaration( this );
    dec->_memPool = &_commentPool;
    dec->SetValue( str ? str : "xml version=\"1.0\" encoding=\"UTF-8\"" );
    return dec;
}

XMLUnknown* XMLDocument::NewUnknown( const char* str )
{
    TIXMLASSERT( sizeof( XMLUnknown ) == _commentPool.ItemSize() );
    XMLUnknown* unk = new (_commentPool.Alloc()) XMLUnknown( this );
    unk->_memPool = &_commentPool;
    unk->SetValue( str );
    return unk;
}

static FILE* callfopen( const char* filepath, const char* mode )
{
    TIXMLASSERT( filepath );
    TIXMLASSERT( mode );
#if defined(_MSC_VER) && (_MSC_VER >= 1400 ) && (!defined WINCE)
    FILE* fp = 0;
    errno_t err = fopen_s( &fp, filepath, mode );
    if ( err ) {
        return 0;
    }
#else
    FILE* fp = fopen( filepath, mode );
#endif
    return fp;
}

void XMLDocument::DeleteNode( XMLNode* node )   {
    TIXMLASSERT( node );
    TIXMLASSERT(node->_document == this );
    if (node->_parent) {
        node->_parent->DeleteChild( node );
    }
    else {
        // Isn't in the tree.

        // Use the parent delete.

        // Also, we need to mark it tracked: we 'know'
        // it was never used.

        node->_memPool->SetTracked();
        // Call the static XMLNode version:
        XMLNode::DeleteNode(node);
    }
}

XMLError XMLDocument::LoadFile( const char* filename )
{
    Clear();
    FILE* fp = callfopen( filename, "rb" );
    if ( !fp ) {
        SetError( XML_ERROR_FILE_NOT_FOUND, filename, 0 );
        return _errorID;
    }
    LoadFile( fp );
    fclose( fp );
    return _errorID;
}

XMLError XMLDocument::LoadFile( FILE* fp )
{
    Clear();

    fseek( fp, 0, SEEK_SET );
    if ( fgetc( fp ) == EOF && ferror( fp ) != 0 ) {
        SetError( XML_ERROR_FILE_READ_ERROR, 0, 0 );
        return _errorID;
    }

    fseek( fp, 0, SEEK_END );
    const long filelength = ftell( fp );
    fseek( fp, 0, SEEK_SET );
    if ( filelength == -1L ) {
        SetError( XML_ERROR_FILE_READ_ERROR, 0, 0 );
        return _errorID;
    }

    const size_t size = filelength;
    if ( size == 0 ) {
        SetError( XML_ERROR_EMPTY_DOCUMENT, 0, 0 );
        return _errorID;
    }

    _charBuffer = new char[size+1];
    size_t read = fread( _charBuffer, 1, size, fp );
    if ( read != size ) {
        SetError( XML_ERROR_FILE_READ_ERROR, 0, 0 );
        return _errorID;
    }

    _charBuffer[size] = 0;

    Parse();
    return _errorID;
}

XMLError XMLDocument::SaveFile( const char* filename, bool compact )
{
    FILE* fp = callfopen( filename, "w" );
    if ( !fp ) {
        SetError( XML_ERROR_FILE_COULD_NOT_BE_OPENED, filename, 0 );
        return _errorID;
    }
    SaveFile(fp, compact);
    fclose( fp );
    return _errorID;
}

XMLError XMLDocument::SaveFile( FILE* fp, bool compact )
{
    // Clear any error from the last save, otherwise it will get reported
    // for *this* call.

    SetError( XML_NO_ERROR, 0, 0 );
    XMLPrinter stream( fp, compact );
    Print( &stream );
    return _errorID;
}

XMLError XMLDocument::Parse( const char* p, size_t len )
{
    Clear();

    if ( len == 0 || !p || !*p ) {
        SetError( XML_ERROR_EMPTY_DOCUMENT, 0, 0 );
        return _errorID;
    }
    if ( len == (size_t)(-1) ) {
        len = strlen( p );
    }
    _charBuffer = new char[ len+1 ];
    memcpy( _charBuffer, p, len );
    _charBuffer[len] = 0;

    Parse();
    if ( Error() ) {
        // clean up now essentially dangling memory.

        // and the parse fail can put objects in the
        // pools that are dead and inaccessible.

        DeleteChildren();
        _elementPool.Clear();
        _attributePool.Clear();
        _textPool.Clear();
        _commentPool.Clear();
    }
    return _errorID;
}

void XMLDocument::Print( XMLPrinter* streamer ) const
{
    XMLPrinter stdStreamer( stdout );
    if ( !streamer ) {
        streamer = &stdStreamer;
    }
    Accept( streamer );
}

void XMLDocument::SetError( XMLError error, const char* str1, const char* str2 )
{
    TIXMLASSERT( error >= 0 && error < XML_ERROR_COUNT );
    _errorID = error;
    _errorStr1 = str1;
    _errorStr2 = str2;
}

const char* XMLDocument::ErrorName() const
{
    TIXMLASSERT( _errorID >= 0 && _errorID < XML_ERROR_COUNT );
    return _errorNames[_errorID];
}

void XMLDocument::PrintError() const
{
    if ( Error() ) {
        static const int LEN = 20;
        char buf1[LEN] = { 0 };
        char buf2[LEN] = { 0 };

        if ( _errorStr1 ) {
            TIXML_SNPRINTF( buf1, LEN, "%s", _errorStr1 );
        }
        if ( _errorStr2 ) {
            TIXML_SNPRINTF( buf2, LEN, "%s", _errorStr2 );
        }

        // Should check INT_MIN ( _errorID ), ErrorName(), buf1, buf2 );
    }
}

void XMLDocument::Parse()
{
    TIXMLASSERT( NoChildren() ); // Clear() must have been called previously
    TIXMLASSERT( _charBuffer );
    char* p = _charBuffer;
    p = XMLUtil::SkipWhiteSpace( p );
    p = const_cast( XMLUtil::ReadBOM( p, &_writeBOM ) );
    if ( !*p ) {
        SetError( XML_ERROR_EMPTY_DOCUMENT, 0, 0 );
        return;
    }
    ParseDeep(p, 0 );
}

XMLPrinter::XMLPrinter( FILE* file, bool compact, int depth ) :
    _elementJustOpened( false ),
    _firstElement( true ),
    _fp( file ),
    _depth( depth ),
    _textDepth( -1 ),
    _processEntities( true ),
    _compactMode( compact )
{
    for( int i=0; i'] = true;   // not required, but consistency is nice
    _buffer.Push( 0 );
}

void XMLPrinter::Print( const char* format, ... )
{
    va_list     va;
    va_start( va, format );

    if ( _fp ) {
        vfprintf( _fp, format, va );
    }
    else {
#if defined(_MSC_VER) && (_MSC_VER >= 1400 )
        #if defined(WINCE)
        int len = 512;
        do {
            len = len*2;
            char* str = new char[len]();
            len = _vsnprintf(str, len, format, va);
            delete[] str;
        }while (len < 0);
        #else
        int len = _vscprintf( format, va );
        #endif
#else
        int len = vsnprintf( 0, 0, format, va );
#endif
        // Close out and re-start the va-args
        va_end( va );
        va_start( va, format );
        TIXMLASSERT( _buffer.Size() > 0 && _buffer[_buffer.Size() - 1] == 0 );
        char* p = _buffer.PushArr( len ) - 1;   // back up over the null terminator.

#if defined(_MSC_VER) && (_MSC_VER >= 1400 )
        #if defined(WINCE)
        _vsnprintf( p, len+1, format, va );
        #else
        vsnprintf_s( p, len+1, _TRUNCATE, format, va );
        #endif
#else
        vsnprintf( p, len+1, format, va );
#endif
    }
    va_end( va );
}

void XMLPrinter::PrintSpace( int depth )
{
    for( int i=0; i 0 && *q < ENTITY_RANGE ) {
                // Check for entities. If one is found, flush
                // the stream up until the entity, write the
                // entity, and keep looking.

                if ( flag[(unsigned char)(*q)] ) {
                    while ( p < q ) {
                        const size_t delta = q - p;
                        // %.*s accepts type int as "precision"
                        const int toPrint = ( INT_MAX < delta ) ? INT_MAX : delta;
                        Print( "%.*s", toPrint, p );
                        p += toPrint;
                    }
                    for( int i=0; i" );
    }
    else {
        if ( _textDepth < 0 && !compactMode) {
            Print( "\n" );
            PrintSpace( _depth );
        }
        Print( "", name );
    }

    if ( _textDepth == _depth ) {
        _textDepth = -1;
    }
    if ( _depth == 0 && !compactMode) {
        Print( "\n" );
    }
    _elementJustOpened = false;
}

void XMLPrinter::SealElementIfJustOpened()
{
    if ( !_elementJustOpened ) {
        return;
    }
    _elementJustOpened = false;
    Print( ">" );
}

void XMLPrinter::PushText( const char* text, bool cdata )
{
    _textDepth = _depth-1;

    SealElementIfJustOpened();
    if ( cdata ) {
        Print( "", text );
    }
    else {
        PrintString( text, true );
    }
}

void XMLPrinter::PushText( int value )
{
    char buf[BUF_SIZE];
    XMLUtil::ToStr( value, buf, BUF_SIZE );
    PushText( buf, false );
}

void XMLPrinter::PushText( unsigned value )
{
    char buf[BUF_SIZE];
    XMLUtil::ToStr( value, buf, BUF_SIZE );
    PushText( buf, false );
}

void XMLPrinter::PushText( bool value )
{
    char buf[BUF_SIZE];
    XMLUtil::ToStr( value, buf, BUF_SIZE );
    PushText( buf, false );
}

void XMLPrinter::PushText( float value )
{
    char buf[BUF_SIZE];
    XMLUtil::ToStr( value, buf, BUF_SIZE );
    PushText( buf, false );
}

void XMLPrinter::PushText( double value )
{
    char buf[BUF_SIZE];
    XMLUtil::ToStr( value, buf, BUF_SIZE );
    PushText( buf, false );
}

void XMLPrinter::PushComment( const char* comment )
{
    SealElementIfJustOpened();
    if ( _textDepth < 0 && !_firstElement && !_compactMode) {
        Print( "\n" );
        PrintSpace( _depth );
    }
    _firstElement = false;
    Print( "", comment );
}

void XMLPrinter::PushDeclaration( const char* value )
{
    SealElementIfJustOpened();
    if ( _textDepth < 0 && !_firstElement && !_compactMode) {
        Print( "\n" );
        PrintSpace( _depth );
    }
    _firstElement = false;
    Print( "%s?>", value );
}

void XMLPrinter::PushUnknown( const char* value )
{
    SealElementIfJustOpened();
    if ( _textDepth < 0 && !_firstElement && !_compactMode) {
        Print( "\n" );
        PrintSpace( _depth );
    }
    _firstElement = false;
    Print( "", value );
}

bool XMLPrinter::VisitEnter( const XMLDocument& doc )
{
    _processEntities = doc.ProcessEntities();
    if ( doc.HasBOM() ) {
        PushHeader( true, false );
    }
    return true;
}

bool XMLPrinter::VisitEnter( const XMLElement& element, const XMLAttribute* attribute )
{
    const XMLElement* parentElem = 0;
    if ( element.Parent() ) {
        parentElem = element.Parent()->ToElement();
    }
    const bool compactMode = parentElem ? CompactMode( *parentElem ) : _compactMode;
    OpenElement( element.Name(), compactMode );
    while ( attribute ) {
        PushAttribute( attribute->Name(), attribute->Value() );
        attribute = attribute->Next();
    }
    return true;
}

bool XMLPrinter::VisitExit( const XMLElement& element )
{
    CloseElement( CompactMode(element) );
    return true;
}

bool XMLPrinter::Visit( const XMLText& text )
{
    PushText( text.Value(), text.CData() );
    return true;
}

bool XMLPrinter::Visit( const XMLComment& comment )
{
    PushComment( comment.Value() );
    return true;
}

bool XMLPrinter::Visit( const XMLDeclaration& declaration )
{
    PushDeclaration( declaration.Value() );
    return true;
}

bool XMLPrinter::Visit( const XMLUnknown& unknown )
{
    PushUnknown( unknown.Value() );
    return true;
}

}   // namespace tinyxml2

;>;>;>*>*>

测试用例代码：

#if defined( _MSC_VER )
    #if !defined( _CRT_SECURE_NO_WARNINGS )
        #define _CRT_SECURE_NO_WARNINGS     // This test file is not intended to be secure.
    #endif
#endif

#include "tinyxml2.h"
#include 
#include 
#include 

#if defined( _MSC_VER )
    #include      // _mkdir
    #include 
    #define WIN32_LEAN_AND_MEAN
    #include 
    _CrtMemState startMemState;
    _CrtMemState endMemState;
#elif defined(MINGW32) || defined(__MINGW32__)
    #include   // mkdir
#else
    #include   // mkdir
#endif

using namespace tinyxml2;
using namespace std;
int gPass = 0;
int gFail = 0;

bool XMLTest (const char* testString, const char* expected, const char* found, bool echo=true, bool extraNL=false )
{
    bool pass = !strcmp( expected, found );
    if ( pass )
        printf ("[pass]");
    else
        printf ("[fail]");

    if ( !echo ) {
        printf (" %s\n", testString);
    }
    else {
        if ( extraNL ) {
            printf( " %s\n", testString );
            printf( "%s\n", expected );
            printf( "%s\n", found );
        }
        else {
            printf (" %s [%s][%s]\n", testString, expected, found);
        }
    }

    if ( pass )
        ++gPass;
    else
        ++gFail;
    return pass;
}

template< class T > bool XMLTest( const char* testString, T expected, T found, bool echo=true )
{
    bool pass = ( expected == found );
    if ( pass )
        printf ("[pass]");
    else
        printf ("[fail]");

    if ( !echo )
        printf (" %s\n", testString);
    else
        printf (" %s [%d][%d]\n", testString, static_cast(expected), static_cast(found) );

    if ( pass )
        ++gPass;
    else
        ++gFail;
    return pass;
}

void NullLineEndings( char* p )
{
    while( p && *p ) {
        if ( *p == '\n' || *p == '\r' ) {
            *p = 0;
            return;
        }
        ++p;
    }
}

int example_1()
{
    XMLDocument doc;
    doc.LoadFile( "resources/dream.xml" );

    return doc.ErrorID();
}
/** @page Example-1 Load an XML File
 *  @dontinclude ./xmltest.cpp
 *  Basic XML file loading.

 *  The basic syntax to load an XML file from
 *  disk and check for an error. (ErrorID()
 *  will return 0 for no error.)
 *  @skip example_1()
 *  @until }
 */

int example_2()
{
    static const char* xml = "";
    XMLDocument doc;
    doc.Parse( xml );

    return doc.ErrorID();
}
/** @page Example-2 Parse an XML from char buffer
 *  @dontinclude ./xmltest.cpp
 *  Basic XML string parsing.

 *  The basic syntax to parse an XML for
 *  a char* and check for an error. (ErrorID()
 *  will return 0 for no error.)
 *  @skip example_2()
 *  @until }
 */

int example_3()
{
    static const char* xml =
        ""
        ""play.dtd\">"
        ""
        ""
        "";

    XMLDocument doc;
    doc.Parse( xml );

    XMLElement* titleElement = doc.FirstChildElement( "PLAY" )->FirstChildElement( "TITLE" );
    const char* title = titleElement->GetText();
    printf( "Name of play (1): %s\n", title );

    XMLText* textNode = titleElement->FirstChild()->ToText();
    title = textNode->Value();
    printf( "Name of play (2): %s\n", title );

    return doc.ErrorID();
}
/** @page Example-3 Get information out of XML
    @dontinclude ./xmltest.cpp
    In this example, we navigate a simple XML
    file, and read some interesting text. Note
    that this example doesn't use error
    checking; working code should check for null
    pointers when walking an XML tree, or use
    XMLHandle.

    (The XML is an excerpt from "dream.xml").

    @skip example_3()
    @until ";

    The structure of the XML file is:

    

        
(declaration)
        
(dtd stuff)
        
Element "PLAY"
        

            
Element "TITLE"
            

                
Text "A Midsummer Night's Dream"
            
        
    

    For this example, we want to print out the
    title of the play. The text of the title (what
    we want) is child of the "TITLE" element which
    is a child of the "PLAY" element.

    We want to skip the declaration and dtd, so the
    method FirstChildElement() is a good choice. The
    FirstChildElement() of the Document is the "PLAY"
    Element, the FirstChildElement() of the "PLAY" Element
    is the "TITLE" Element.

    @until ( "TITLE" );

    We can then use the convenience function GetText()
    to get the title of the play.

    @until title );

    Text is just another Node in the XML DOM. And in
    fact you should be a little cautious with it, as
    text nodes can contain elements.

    @verbatim
    Consider: A Midsummer Night's Dream
    @endverbatim

    It is more correct to actually query the Text Node
    if in doubt:

    @until title );

    Noting that here we use FirstChild() since we are
    looking for XMLText, not an element, and ToText()
    is a cast from a Node to a XMLText.

*/

bool example_4()
{
    static const char* xml =
        ""
        "  "
        "  "
        "      2"
        "  "
        "";

    XMLDocument doc;
    doc.Parse( xml );

    int v0 = 0;
    int v1 = 0;

    XMLElement* attributeApproachElement = doc.FirstChildElement()->FirstChildElement( "attributeApproach" );
    attributeApproachElement->QueryIntAttribute( "v", &v0 );

    XMLElement* textApproachElement = doc.FirstChildElement()->FirstChildElement( "textApproach" );
    textApproachElement->FirstChildElement( "v" )->QueryIntText( &v1 );

    printf( "Both values are the same: %d and %d\n", v0, v1 );

    return !doc.Error() && ( v0 == v1 );
}
/** @page Example-4 Read attributes and text information.
    @dontinclude ./xmltest.cpp

    There are fundamentally 2 ways of writing a key-value
    pair into an XML file. (Something that's always annoyed
    me about XML.) Either by using attributes, or by writing
    the key name into an element and the value into
    the text node wrapped by the element. Both approaches
    are illustrated in this example, which shows two ways
    to encode the value "2" into the key "v":

    @skip example_4()
    @until "";

    TinyXML-2 has accessors for both approaches.

    When using an attribute, you navigate to the XMLElement
    with that attribute and use the QueryIntAttribute()
    group of methods. (Also QueryFloatAttribute(), etc.)

    @skip XMLElement* attributeApproachElement
    @until &v0 );

    When using the text approach, you need to navigate
    down one more step to the XMLElement that contains
    the text. Note the extra FirstChildElement( "v" )
    in the code below. The value of the text can then
    be safely queried with the QueryIntText() group
    of methods. (Also QueryFloatText(), etc.)

    @skip XMLElement* textApproachElement
    @until &v1 );
*/

int main( int argc, const char ** argv )
{
    #if defined( _MSC_VER ) && defined( DEBUG )
        _CrtMemCheckpoint( &startMemState );
        // Enable MS Visual C++ debug heap memory leaks dump on exit
        _CrtSetDbgFlag(_CrtSetDbgFlag(_CRTDBG_REPORT_FLAG) | _CRTDBG_LEAK_CHECK_DF);
    #endif

    #if defined(_MSC_VER) || defined(MINGW32) || defined(__MINGW32__)
        #if defined __MINGW64_VERSION_MAJOR && defined __MINGW64_VERSION_MINOR
            //MINGW64: both 32 and 64-bit
            mkdir( "resources/out/" );
                #else
                    _mkdir( "resources/out/" );
                #endif
    #else
        mkdir( "resources/out/", S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH);
    #endif

    {
        TIXMLASSERT( true );
    }

    if ( argc > 1 ) {
        XMLDocument* doc = new XMLDocument();
        clock_t startTime = clock();
        doc->LoadFile( argv[1] );
        clock_t loadTime = clock();
        int errorID = doc->ErrorID();
        delete doc; doc = 0;
        clock_t deleteTime = clock();

        printf( "Test file '%s' loaded. ErrorID=%d\n", argv[1], errorID );
        if ( !errorID ) {
            printf( "Load time=%u\n",   (unsigned)(loadTime - startTime) );
            printf( "Delete time=%u\n", (unsigned)(deleteTime - loadTime) );
            printf( "Total time=%u\n",  (unsigned)(deleteTime - startTime) );
        }
        exit(0);
    }

    FILE* fp = fopen( "resources/dream.xml", "r" );
    if ( !fp ) {
        printf( "Error opening test file 'dream.xml'.\n"
                "Is your working directory the same as where \n"
                "the xmltest.cpp and dream.xml file are?\n\n"
    #if defined( _MSC_VER )
                "In windows Visual Studio you may need to set\n"
                "Properties->Debugging->Working Directory to '..'\n"
    #endif
              );
        exit( 1 );
    }
    fclose( fp );

    XMLTest( "Example-1", 0, example_1() );
    XMLTest( "Example-2", 0, example_2() );
    XMLTest( "Example-3", 0, example_3() );
    XMLTest( "Example-4", true, example_4() );

    /* ------ Example 2: Lookup information. ---- */

    {
        static const char* test[] = {   "",
                                        "",
                                        "",
                                        "",
                                        "",
                                        "",
                                        "  \n    \n  ",
                                        "",
                                        "",
                                        "Text inside element.",
                                        "",
                                        "Text inside and bolded in the element.",
                                        "Text inside and bolded in the element.",
                                        "This & That.",
                                        "",
                                        0
        };
        for( int i=0; test[i]; ++i ) {
            XMLDocument doc;
            doc.Parse( test[i] );
            doc.Print();
            printf( "----------------------------------------------\n" );
        }
    }
#if 1
    {
        static const char* test = "";

        XMLDocument doc;
        doc.Parse( test );
        doc.Print();
    }

    {
        static const char* test = "Text before.";
        XMLDocument doc;
        doc.Parse( test );
        XMLElement* root = doc.FirstChildElement();
        XMLElement* newElement = doc.NewElement( "Subelement" );
        root->InsertEndChild( newElement );
        doc.Print();
    }
    {
        XMLDocument* doc = new XMLDocument();
        static const char* test = "";
        doc->Parse( test );
        delete doc;
    }
    {
        // Test: Programmatic DOM
        // Build:
        //      
        //          
        //          
        //          
        //          & Text!
        //      

        XMLDocument* doc = new XMLDocument();
        XMLNode* element = doc->InsertEndChild( doc->NewElement( "element" ) );

        XMLElement* sub[3] = { doc->NewElement( "sub" ), doc->NewElement( "sub" ), doc->NewElement( "sub" ) };
        for( int i=0; iSetAttribute( "attrib", i );
        }
        element->InsertEndChild( sub[2] );
        XMLNode* comment = element->InsertFirstChild( doc->NewComment( "comment" ) );
        element->InsertAfterChild( comment, sub[0] );
        element->InsertAfterChild( sub[0], sub[1] );
        sub[2]->InsertFirstChild( doc->NewText( "& Text!" ));
        doc->Print();
        XMLTest( "Programmatic DOM", "comment", doc->FirstChildElement( "element" )->FirstChild()->Value() );
        XMLTest( "Programmatic DOM", "0", doc->FirstChildElement( "element" )->FirstChildElement()->Attribute( "attrib" ) );
        XMLTest( "Programmatic DOM", 2, doc->FirstChildElement()->LastChildElement( "sub" )->IntAttribute( "attrib" ) );
        XMLTest( "Programmatic DOM", "& Text!",
                 doc->FirstChildElement()->LastChildElement( "sub" )->FirstChild()->ToText()->Value() );

        // And now deletion:
        element->DeleteChild( sub[2] );
        doc->DeleteNode( comment );

        element->FirstChildElement()->SetAttribute( "attrib", true );
        element->LastChildElement()->DeleteAttribute( "attrib" );

        XMLTest( "Programmatic DOM", true, doc->FirstChildElement()->FirstChildElement()->BoolAttribute( "attrib" ) );
        int value = 10;
        int result = doc->FirstChildElement()->LastChildElement()->QueryIntAttribute( "attrib", &value );
        XMLTest( "Programmatic DOM", result, (int)XML_NO_ATTRIBUTE );
        XMLTest( "Programmatic DOM", value, 10 );

        doc->Print();

        {
            XMLPrinter streamer;
            doc->Print( &streamer );
            printf( "%s", streamer.CStr() );
        }
        {
            XMLPrinter streamer( 0, true );
            doc->Print( &streamer );
            XMLTest( "Compact mode", "", streamer.CStr(), false );
        }
        doc->SaveFile( "./resources/out/pretty.xml" );
        doc->SaveFile( "./resources/out/compact.xml", true );
        delete doc;
    }
    {
        // Test: Dream
        // XML1 : 1,187,569 bytes   in 31,209 allocations
        // XML2 :   469,073 bytes   in    323 allocations
        //int newStart = gNew;
        XMLDocument doc;
        doc.LoadFile( "resources/dream.xml" );

        doc.SaveFile( "resources/out/dreamout.xml" );
        doc.PrintError();

        XMLTest( "Dream", "xml version=\"1.0\"",
                          doc.FirstChild()->ToDeclaration()->Value() );
        XMLTest( "Dream", true, doc.FirstChild()->NextSibling()->ToUnknown() ? true : false );
        XMLTest( "Dream", "DOCTYPE PLAY SYSTEM \"play.dtd\"",
                          doc.FirstChild()->NextSibling()->ToUnknown()->Value() );
        XMLTest( "Dream", "And Robin shall restore amends.",
                          doc.LastChild()->LastChild()->LastChild()->LastChild()->LastChildElement()->GetText() );
        XMLTest( "Dream", "And Robin shall restore amends.",
                          doc.LastChild()->LastChild()->LastChild()->LastChild()->LastChildElement()->GetText() );

        XMLDocument doc2;
        doc2.LoadFile( "resources/out/dreamout.xml" );
        XMLTest( "Dream-out", "xml version=\"1.0\"",
                          doc2.FirstChild()->ToDeclaration()->Value() );
        XMLTest( "Dream-out", true, doc2.FirstChild()->NextSibling()->ToUnknown() ? true : false );
        XMLTest( "Dream-out", "DOCTYPE PLAY SYSTEM \"play.dtd\"",
                          doc2.FirstChild()->NextSibling()->ToUnknown()->Value() );
        XMLTest( "Dream-out", "And Robin shall restore amends.",
                          doc2.LastChild()->LastChild()->LastChild()->LastChild()->LastChildElement()->GetText() );

        //gNewTotal = gNew - newStart;
    }

    {
        const char* error = "\n"
                            "\n"
                            "    \n"
                            "";

        XMLDocument doc;
        doc.Parse( error );
        XMLTest( "Bad XML", doc.ErrorID(), XML_ERROR_PARSING_ATTRIBUTE );
    }

    {
        const char* str = "";

        XMLDocument doc;
        doc.Parse( str );

        XMLElement* ele = doc.FirstChildElement();

        int iVal, result;
        double dVal;

        result = ele->QueryDoubleAttribute( "attr0", &dVal );
        XMLTest( "Query attribute: int as double", result, (int)XML_NO_ERROR );
        XMLTest( "Query attribute: int as double", (int)dVal, 1 );
        result = ele->QueryDoubleAttribute( "attr1", &dVal );
        XMLTest( "Query attribute: double as double", result, (int)XML_NO_ERROR );
        XMLTest( "Query attribute: double as double", (int)dVal, 2 );
        result = ele->QueryIntAttribute( "attr1", &iVal );
        XMLTest( "Query attribute: double as int", result, (int)XML_NO_ERROR );
        XMLTest( "Query attribute: double as int", iVal, 2 );
        result = ele->QueryIntAttribute( "attr2", &iVal );
        XMLTest( "Query attribute: not a number", result, (int)XML_WRONG_ATTRIBUTE_TYPE );
        result = ele->QueryIntAttribute( "bar", &iVal );
        XMLTest( "Query attribute: does not exist", result, (int)XML_NO_ATTRIBUTE );
    }

    {
        const char* str = "";

        XMLDocument doc;
        doc.Parse( str );

        XMLElement* ele = doc.FirstChildElement();

        int iVal, iVal2;
        double dVal, dVal2;

        ele->SetAttribute( "str", "strValue" );
        ele->SetAttribute( "int", 1 );
        ele->SetAttribute( "double", -1.0 );

        const char* cStr = ele->Attribute( "str" );
        ele->QueryIntAttribute( "int", &iVal );
        ele->QueryDoubleAttribute( "double", &dVal );

        ele->QueryAttribute( "int", &iVal2 );
        ele->QueryAttribute( "double", &dVal2 );

        XMLTest( "Attribute match test", ele->Attribute( "str", "strValue" ), "strValue" );
        XMLTest( "Attribute round trip. c-string.", "strValue", cStr );
        XMLTest( "Attribute round trip. int.", 1, iVal );
        XMLTest( "Attribute round trip. double.", -1, (int)dVal );
        XMLTest( "Alternate query", true, iVal == iVal2 );
        XMLTest( "Alternate query", true, dVal == dVal2 );
    }

    {
        XMLDocument doc;
        doc.LoadFile( "resources/utf8test.xml" );

        // Get the attribute "value" from the "Russian" element and check it.
        XMLElement* element = doc.FirstChildElement( "document" )->FirstChildElement( "Russian" );
        const unsigned char correctValue[] = {  0xd1U, 0x86U, 0xd0U, 0xb5U, 0xd0U, 0xbdU, 0xd0U, 0xbdU,
                                                0xd0U, 0xbeU, 0xd1U, 0x81U, 0xd1U, 0x82U, 0xd1U, 0x8cU, 0 };

        XMLTest( "UTF-8: Russian value.", (const char*)correctValue, element->Attribute( "value" ) );

        const unsigned char russianElementName[] = {    0xd0U, 0xa0U, 0xd1U, 0x83U,
                                                        0xd1U, 0x81U, 0xd1U, 0x81U,
                                                        0xd0U, 0xbaU, 0xd0U, 0xb8U,
                                                        0xd0U, 0xb9U, 0 };
        const char russianText[] = "";

        XMLText* text = doc.FirstChildElement( "document" )->FirstChildElement( (const char*) russianElementName )->FirstChild()->ToText();
        XMLTest( "UTF-8: Browsing russian element name.",
                 russianText,
                 text->Value() );

        // Now try for a round trip.
        doc.SaveFile( "resources/out/utf8testout.xml" );

        // Check the round trip.
        int okay = 0;

        FILE* saved  = fopen( "resources/out/utf8testout.xml", "r" );
        FILE* verify = fopen( "resources/utf8testverify.xml", "r" );

        if ( saved && verify )
        {
            okay = 1;
            char verifyBuf[256];
            while ( fgets( verifyBuf, 256, verify ) )
            {
                char savedBuf[256];
                fgets( savedBuf, 256, saved );
                NullLineEndings( verifyBuf );
                NullLineEndings( savedBuf );

                if ( strcmp( verifyBuf, savedBuf ) )
                {
                    printf( "verify:%sGetText() );

        str = "This is text";
        doc.Parse( str );
        element = doc.RootElement();

        XMLTest( "GetText() contained element.", element->GetText() == 0, true );
    }

    // --------SetText()-----------
    {
        const char* str = "";
        XMLDocument doc;
        doc.Parse( str );
        XMLElement* element = doc.RootElement();

        element->SetText("darkness.");
        XMLTest( "SetText() normal use (open/close).", "darkness.", element->GetText() );

        element->SetText("blue flame.");
        XMLTest( "SetText() replace.", "blue flame.", element->GetText() );

        str = "";
        doc.Parse( str );
        element = doc.RootElement();

        element->SetText("The driver");
        XMLTest( "SetText() normal use. (self-closing)", "The driver", element->GetText() );

        element->SetText("horses");
        XMLTest( "SetText() replace with tag-like text.", "horses", element->GetText() );
        //doc.Print();

        str = "Text in nested element";
        doc.Parse( str );
        element = doc.RootElement();

        element->SetText("wolves");
        XMLTest( "SetText() prefix to nested non-text children.", "wolves", element->GetText() );

        str = "";
        doc.Parse( str );
        element = doc.RootElement();

        element->SetText( "str" );
        XMLTest( "SetText types", "str", element->GetText() );

        element->SetText( 1 );
        XMLTest( "SetText types", "1", element->GetText() );

        element->SetText( 1U );
        XMLTest( "SetText types", "1", element->GetText() );

        element->SetText( true );
        XMLTest( "SetText types", "1", element->GetText() ); // TODO: should be 'true'?

        element->SetText( 1.5f );
        XMLTest( "SetText types", "1.5", element->GetText() );

        element->SetText( 1.5 );
        XMLTest( "SetText types", "1.5", element->GetText() );
    }

    // ---------- CDATA ---------------
    {
        const char* str =   ""
                                ""
                            "";
        XMLDocument doc;
        doc.Parse( str );
        doc.Print();

        XMLTest( "CDATA parse.", doc.FirstChildElement()->FirstChild()->Value(),
                                 "I am > the rules!\n...since I make symbolic puns",
                                 false );
    }

    // ----------- CDATA -------------
    {
        const char* str =   ""
                                ""
                            "";
        XMLDocument doc;
        doc.Parse( str );
        doc.Print();

        XMLTest( "CDATA parse. [ tixml1:1480107 ]", doc.FirstChildElement()->FirstChild()->Value(),
                                 "I am > the rules!\n...since I make symbolic puns",
                                 false );
    }

    // InsertAfterChild causes crash.
    {
        // InsertBeforeChild and InsertAfterChild causes crash.
        XMLDocument doc;
        XMLElement* parent = doc.NewElement( "Parent" );
        doc.InsertFirstChild( parent );

        XMLElement* childText0 = doc.NewElement( "childText0" );
        XMLElement* childText1 = doc.NewElement( "childText1" );

        XMLNode* childNode0 = parent->InsertEndChild( childText0 );
        XMLNode* childNode1 = parent->InsertAfterChild( childNode0, childText1 );

        XMLTest( "Test InsertAfterChild on empty node. ", ( childNode1 == parent->LastChild() ), true );
    }

    {
        // Entities not being written correctly.
        // From Lynn Allen

        const char* passages =
            ""
            ""
                ", and &, as well as a fake copyright ©.\"> "
            "";

        XMLDocument doc;
        doc.Parse( passages );
        XMLElement* psg = doc.RootElement()->FirstChildElement();
        const char* context = psg->Attribute( "context" );
        const char* expected = "Line 5 has \"quotation marks\" and 'apostrophe marks'. It also has , and &, as well as a fake copyright \xC2\xA9.";

        XMLTest( "Entity transformation: read. ", expected, context, true );

        FILE* textfile = fopen( "resources/out/textfile.txt", "w" );
        if ( textfile )
        {
            XMLPrinter streamer( textfile );
            psg->Accept( &streamer );
            fclose( textfile );
        }

        textfile = fopen( "resources/out/textfile.txt", "r" );
        TIXMLASSERT( textfile );
        if ( textfile )
        {
            char buf[ 1024 ];
            fgets( buf, 1024, textfile );
            XMLTest( "Entity transformation: write. ",
                     ", and &, as well as a fake copyright \xC2\xA9.\"/>\n",
                     buf, false );
            fclose( textfile );
        }
    }

    {
        // Suppress entities.
        const char* passages =
            ""
            ""
                "Crazy &ttk;"
            "";

        XMLDocument doc( false );
        doc.Parse( passages );

        XMLTest( "No entity parsing.", doc.FirstChildElement()->FirstChildElement()->Attribute( "context" ),
                 "Line 5 has "quotation marks" and 'apostrophe marks'." );
        XMLTest( "No entity parsing.", doc.FirstChildElement()->FirstChildElement()->FirstChild()->Value(),
                 "Crazy &ttk;" );
        doc.Print();
    }

    {
        const char* test = "";

        XMLDocument doc;
        doc.Parse( test );
        XMLTest( "dot in names", doc.Error(), false );
        XMLTest( "dot in names", doc.FirstChildElement()->Name(), "a.elem" );
        XMLTest( "dot in names", doc.FirstChildElement()->Attribute( "xmi.version" ), "2.0" );
    }

    {
        const char* test = "1.1 Start easy ignore fin thickness
";

        XMLDocument doc;
        doc.Parse( test );

        XMLText* text = doc.FirstChildElement()->FirstChildElement()->FirstChild()->ToText();
        XMLTest( "Entity with one digit.",
                 text->Value(), "1.1 Start easy ignore fin thickness\n",
                 false );
    }

    {
        // DOCTYPE not preserved (950171)
        //
        const char* doctype =
            ""
            ""
            ""
            ""
            "";

        XMLDocument doc;
        doc.Parse( doctype );
        doc.SaveFile( "resources/out/test7.xml" );
        doc.DeleteChild( doc.RootElement() );
        doc.LoadFile( "resources/out/test7.xml" );
        doc.Print();

        const XMLUnknown* decl = doc.FirstChild()->NextSibling()->ToUnknown();
        XMLTest( "Correct value of unknown.", "DOCTYPE PLAY SYSTEM 'play.dtd'", decl->Value() );

    }

    {
        // Comments do not stream out correctly.
        const char* doctype =
            "";
        XMLDocument doc;
        doc.Parse( doctype );

        XMLComment* comment = doc.FirstChild()->ToComment();

        XMLTest( "Comment formatting.", " Somewhat ", comment->Value() );
    }
    {
        // Double attributes
        const char* doctype = "";

        XMLDocument doc;
        doc.Parse( doctype );

        XMLTest( "Parsing repeated attributes.", XML_ERROR_PARSING_ATTRIBUTE, doc.ErrorID() );    // is an  error to tinyxml (didn't use to be, but caused issues)
        doc.PrintError();
    }

    {
        // Embedded null in stream.
        const char* doctype = "";

        XMLDocument doc;
        doc.Parse( doctype );
        XMLTest( "Embedded null throws error.", true, doc.Error() );
    }

    {
        // Empty documents should return TIXML_XML_ERROR_PARSING_EMPTY, bug 1070717
        const char* str = "";
        XMLDocument doc;
        doc.Parse( str );
        XMLTest( "Empty document error", XML_ERROR_EMPTY_DOCUMENT, doc.ErrorID() );
    }

    {
        // Documents with all whitespaces should return TIXML_XML_ERROR_PARSING_EMPTY, bug 1070717
        const char* str = "    ";
        XMLDocument doc;
        doc.Parse( str );
        XMLTest( "All whitespaces document error", XML_ERROR_EMPTY_DOCUMENT, doc.ErrorID() );
    }

    {
        // Low entities
        XMLDocument doc;
        doc.Parse( "" );
        const char result[] = { 0x0e, 0 };
        XMLTest( "Low entities.", doc.FirstChildElement()->GetText(), result );
        doc.Print();
    }

    {
        // Attribute values with trailing quotes not handled correctly
        XMLDocument doc;
        doc.Parse( "" );
        XMLTest( "Throw error with bad end quotes.", doc.Error(), true );
    }

    {
        // [ 1663758 ] Failure to report error on bad XML
        XMLDocument xml;
        xml.Parse("");
        XMLTest("Missing end tag at end of input", xml.Error(), true);
        xml.Parse(" ");
        XMLTest("Missing end tag with trailing whitespace", xml.Error(), true);
        xml.Parse("");
        XMLTest("Mismatched tags", xml.ErrorID(), XML_ERROR_MISMATCHED_ELEMENT);
    }

    {
        // [ 1475201 ] TinyXML parses entities in comments
        XMLDocument xml;
        xml.Parse(""
                  "" );

        XMLNode* e0 = xml.FirstChild();
        XMLNode* e1 = e0->NextSibling();
        XMLComment* c0 = e0->ToComment();
        XMLComment* c1 = e1->ToComment();

        XMLTest( "Comments ignore entities.", " declarations for  &  ", c0->Value(), true );
        XMLTest( "Comments ignore entities.", " far & away ", c1->Value(), true );
    }

    {
        XMLDocument xml;
        xml.Parse( ""
                        ""
                        ""
                        ""
                    "" );
        xml.Print();

        int count = 0;

        for( XMLNode* ele = xml.FirstChildElement( "Parent" )->FirstChild();
             ele;
             ele = ele->NextSibling() )
        {
            ++count;
        }

        XMLTest( "Comments iterate correctly.", 3, count );
    }

    {
        // trying to repro ]1874301]. If it doesn't go into an infinite loop, all is well.
        unsigned char buf[] = " ";
        XMLDocument doc;
        doc.Parse( pub );

        XMLDocument clone;
        for( const XMLNode* node=doc.FirstChild(); node; node=node->NextSibling() ) {
            XMLNode* copy = node->ShallowClone( &clone );
            clone.InsertEndChild( copy );
        }

        clone.Print();

        int count=0;
        const XMLNode* a=clone.FirstChild();
        const XMLNode* b=doc.FirstChild();
        for( ; a && b; a=a->NextSibling(), b=b->NextSibling() ) {
            ++count;
            XMLTest( "Clone and Equal", true, a->ShallowEqual( b ));
        }
        XMLTest( "Clone and Equal", 4, count );
    }

    {
        // This shouldn't crash.
        XMLDocument doc;
        if(XML_NO_ERROR != doc.LoadFile( "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" ))
        {
            doc.PrintError();
        }
        XMLTest( "Error in snprinf handling.", true, doc.Error() );
    }

    {
        // Attribute ordering.
        static const char* xml = "";
        XMLDocument doc;
        doc.Parse( xml );
        XMLElement* ele = doc.FirstChildElement();

        const XMLAttribute* a = ele->FirstAttribute();
        XMLTest( "Attribute order", "1", a->Value() );
        a = a->Next();
        XMLTest( "Attribute order", "2", a->Value() );
        a = a->Next();
        XMLTest( "Attribute order", "3", a->Value() );
        XMLTest( "Attribute order", "attrib3", a->Name() );

        ele->DeleteAttribute( "attrib2" );
        a = ele->FirstAttribute();
        XMLTest( "Attribute order", "1", a->Value() );
        a = a->Next();
        XMLTest( "Attribute order", "3", a->Value() );

        ele->DeleteAttribute( "attrib1" );
        ele->DeleteAttribute( "attrib3" );
        XMLTest( "Attribute order (empty)", false, ele->FirstAttribute() ? true : false );
    }

    {
        // Make sure an attribute with a space in it succeeds.
        static const char* xml0 = "";
        static const char* xml1 = "";
        static const char* xml2 = "";
        XMLDocument doc0;
        doc0.Parse( xml0 );
        XMLDocument doc1;
        doc1.Parse( xml1 );
        XMLDocument doc2;
        doc2.Parse( xml2 );

        XMLElement* ele = 0;
        ele = doc0.FirstChildElement();
        XMLTest( "Attribute with space #1", "Test Attribute", ele->Attribute( "attribute1" ) );
        ele = doc1.FirstChildElement();
        XMLTest( "Attribute with space #2", "Test Attribute", ele->Attribute( "attribute1" ) );
        ele = doc2.FirstChildElement();
        XMLTest( "Attribute with space #3", "Test Attribute", ele->Attribute( "attribute1" ) );
    }

    {
        // Make sure we don't go into an infinite loop.
        static const char* xml = "";
        XMLDocument doc;
        doc.Parse( xml );
        XMLElement* ele0 = doc.FirstChildElement()->FirstChildElement();
        XMLElement* ele1 = ele0->NextSiblingElement();
        bool equal = ele0->ShallowEqual( ele1 );

        XMLTest( "Infinite loop in shallow equal.", true, equal );
    }

    // -------- Handles ------------
    {
        static const char* xml = "Text";
        XMLDocument doc;
        doc.Parse( xml );

        XMLElement* ele = XMLHandle( doc ).FirstChildElement( "element" ).FirstChild().ToElement();
        XMLTest( "Handle, success, mutable", ele->Value(), "sub" );

        XMLHandle docH( doc );
        ele = docH.FirstChildElement( "none" ).FirstChildElement( "element" ).ToElement();
        XMLTest( "Handle, dne, mutable", false, ele != 0 );
    }

    {
        static const char* xml = "Text";
        XMLDocument doc;
        doc.Parse( xml );
        XMLConstHandle docH( doc );

        const XMLElement* ele = docH.FirstChildElement( "element" ).FirstChild().ToElement();
        XMLTest( "Handle, success, const", ele->Value(), "sub" );

        ele = docH.FirstChildElement( "none" ).FirstChildElement( "element" ).ToElement();
        XMLTest( "Handle, dne, const", false, ele != 0 );
    }
    {
        // Default Declaration & BOM
        XMLDocument doc;
        doc.InsertEndChild( doc.NewDeclaration() );
        doc.SetBOM( true );

        XMLPrinter printer;
        doc.Print( &printer );

        static const char* result  = "\xef\xbb\xbf";
        XMLTest( "BOM and default declaration", printer.CStr(), result, false );
        XMLTest( "CStrSize", printer.CStrSize(), 42, false );
    }
    {
        const char* xml = " This \nis '  text  ' "
                            "  This is ' text '  \n"
                            "This  is  '  \n\n text '"
                          "";
        XMLDocument doc( true, COLLAPSE_WHITESPACE );
        doc.Parse( xml );

        const XMLElement* element = doc.FirstChildElement();
        for( const XMLElement* parent = element->FirstChildElement();
             parent;
             parent = parent->NextSiblingElement() )
        {
            XMLTest( "Whitespace collapse", "This is ' text '", parent->GetText() );
        }
    }

#if 0
    {
        // Passes if assert doesn't fire.
        XMLDocument xmlDoc;

        xmlDoc.NewDeclaration();
        xmlDoc.NewComment("Configuration file");

        XMLElement *root = xmlDoc.NewElement("settings");
        root->SetAttribute("version", 2);
    }
#endif

    {
        const char* xml = "    ";
        XMLDocument doc( true, COLLAPSE_WHITESPACE );
        doc.Parse( xml );
        XMLTest( "Whitespace  all space", true, 0 == doc.FirstChildElement()->FirstChild() );
    }

    {
        // An assert should not fire.
        const char* xml = "";
        XMLDocument doc;
        doc.Parse( xml );
        XMLElement* ele = doc.NewElement( "unused" );     // This will get cleaned up with the 'doc' going out of scope.
        XMLTest( "Tracking unused elements", true, ele != 0, false );
    }

    {
        const char* xml = "abc";
        XMLDocument doc;
        doc.Parse( xml );
        XMLElement* ele = doc.FirstChildElement( "parent")->FirstChildElement( "child");

        XMLPrinter printer;
        ele->Accept( &printer );
        XMLTest( "Printing of sub-element", "abc\n", printer.CStr(), false );
    }

    {
        XMLDocument doc;
        XMLError error = doc.LoadFile( "resources/empty.xml" );
        XMLTest( "Loading an empty file", XML_ERROR_EMPTY_DOCUMENT, error );
        XMLTest( "Loading an empty file and ErrorName as string", "XML_ERROR_EMPTY_DOCUMENT", doc.ErrorName() );
        doc.PrintError();
    }

    {
        // BOM preservation
        static const char* xml_bom_preservation  = "\xef\xbb\xbf\n";
        {
            XMLDocument doc;
            XMLTest( "BOM preservation (parse)", XML_NO_ERROR, doc.Parse( xml_bom_preservation ), false );
            XMLPrinter printer;
            doc.Print( &printer );

            XMLTest( "BOM preservation (compare)", xml_bom_preservation, printer.CStr(), false, true );
            doc.SaveFile( "resources/bomtest.xml" );
        }
        {
            XMLDocument doc;
            doc.LoadFile( "resources/bomtest.xml" );
            XMLTest( "BOM preservation (load)", true, doc.HasBOM(), false );

            XMLPrinter printer;
            doc.Print( &printer );
            XMLTest( "BOM preservation (compare)", xml_bom_preservation, printer.CStr(), false, true );
        }
    }

    {
        // Insertion with Removal
        const char* xml = ""
            ""
            ""
            ""
            "element 1text"
            ""
            ""
            ""
            "";
        const char* xmlInsideTwo = ""
            ""
            ""
            ""
            ""
            "element 1text"
            ""
            ""
            "";
        const char* xmlAfterOne = ""
            ""
            ""
            ""
            "element 1text"
            ""
            ""
            "";
        const char* xmlAfterTwo = ""
            ""
            ""
            ""
            ""
            "element 1text"
            ""
            "";

        XMLDocument doc;
        doc.Parse(xml);
        XMLElement* subtree = doc.RootElement()->FirstChildElement("one")->FirstChildElement("subtree");
        XMLElement* two = doc.RootElement()->FirstChildElement("two");
        two->InsertFirstChild(subtree);
        XMLPrinter printer1(0, true);
        doc.Accept(&printer1);
        XMLTest("Move node from within  to ", xmlInsideTwo, printer1.CStr());

        doc.Parse(xml);
        subtree = doc.RootElement()->FirstChildElement("one")->FirstChildElement("subtree");
        two = doc.RootElement()->FirstChildElement("two");
        doc.RootElement()->InsertAfterChild(two, subtree);
        XMLPrinter printer2(0, true);
        doc.Accept(&printer2);
        XMLTest("Move node from within  after ", xmlAfterTwo, printer2.CStr(), false);

        doc.Parse(xml);
        XMLNode* one = doc.RootElement()->FirstChildElement("one");
        subtree = one->FirstChildElement("subtree");
        doc.RootElement()->InsertAfterChild(one, subtree);
        XMLPrinter printer3(0, true);
        doc.Accept(&printer3);
        XMLTest("Move node from within  after ", xmlAfterOne, printer3.CStr(), false);

        doc.Parse(xml);
        subtree = doc.RootElement()->FirstChildElement("one")->FirstChildElement("subtree");
        two = doc.RootElement()->FirstChildElement("two");
        doc.RootElement()->InsertEndChild(subtree);
        XMLPrinter printer4(0, true);
        doc.Accept(&printer4);
        XMLTest("Move node from within  after ", xmlAfterTwo, printer4.CStr(), false);
    }

    {
        const char* xml = "";
        XMLDocument doc;
        doc.Parse(xml);
        doc.Print();
    }

    {
        // Test that it doesn't crash.
        const char* xml = "2";
        XMLDocument doc;
        doc.Parse(xml);
        doc.PrintError();
    }

#if 1
        // the question being explored is what kind of print to use:
        // https://github.com/leethomason/tinyxml2/issues/63
    {
        //const char* xml = "";
        const char* xml = "";
        XMLDocument doc;
        doc.Parse( xml );
        doc.FirstChildElement()->SetAttribute( "attrA-f64", 123456789.123456789 );
        doc.FirstChildElement()->SetAttribute( "attrB-f64", 1.001e9 );
        doc.FirstChildElement()->SetAttribute( "attrC-f64", 1.0e9 );
        doc.FirstChildElement()->SetAttribute( "attrC-f64", 1.0e20 );
        doc.FirstChildElement()->SetAttribute( "attrD-f64", 1.0e-10 );
        doc.FirstChildElement()->SetAttribute( "attrD-f64", 0.123456789 );

        doc.FirstChildElement()->SetAttribute( "attrA-f32", 123456789.123456789f );
        doc.FirstChildElement()->SetAttribute( "attrB-f32", 1.001e9f );
        doc.FirstChildElement()->SetAttribute( "attrC-f32", 1.0e9f );
        doc.FirstChildElement()->SetAttribute( "attrC-f32", 1.0e20f );
        doc.FirstChildElement()->SetAttribute( "attrD-f32", 1.0e-10f );
        doc.FirstChildElement()->SetAttribute( "attrD-f32", 0.123456789f );

        doc.Print();

        /* The result of this test is platform, compiler, and library version dependent. :("
        XMLPrinter printer;
        doc.Print( &printer );
        XMLTest( "Float and double formatting.",
            "\n",
            printer.CStr(),
            true );
        */
    }
#endif

    {
        // Issue #184
        // If it doesn't assert, it passes. Caused by objects
        // getting created during parsing which are then
        // inaccessible in the memory pools.

        {
            XMLDocument doc;
            doc.Parse("");
        }
        {
            XMLDocument doc;
            doc.Parse("");
            doc.Clear();
        }
    }

    {
        // If this doesn't assert in DEBUG, all is well.

        tinyxml2::XMLDocument doc;
        tinyxml2::XMLElement *pRoot = doc.NewElement("Root");
        doc.DeleteNode(pRoot);
    }

    {
        // Should not assert in DEBUG
        XMLPrinter printer;
    }

    {
        // Issue 291. Should not crash
        const char* xml = "";
        XMLDocument doc;
        doc.Parse( xml );

        XMLPrinter printer;
        doc.Print( &printer );
    }
    {
        // Issue 299. Can print elements that are not linked in.
        // Will crash if issue not fixed.
        XMLDocument doc;
        XMLElement* newElement = doc.NewElement( "printme" );
        XMLPrinter printer;
        newElement->Accept( &printer );
        // Delete the node to avoid possible memory leak report in debug output
        doc.DeleteNode( newElement );
    }
    {
        // Issue 302. Clear errors from LoadFile/SaveFile
        XMLDocument doc;
        XMLTest( "Issue 302. Should be no error initially", "XML_SUCCESS", doc.ErrorName() );
        doc.SaveFile( "./no/such/path/pretty.xml" );
        XMLTest( "Issue 302. Fail to save", "XML_ERROR_FILE_COULD_NOT_BE_OPENED", doc.ErrorName() );
        doc.SaveFile( "./resources/out/compact.xml", true );
        XMLTest( "Issue 302. Subsequent success in saving", "XML_SUCCESS", doc.ErrorName() );
    }

    {
        // If a document fails to load then subsequent
        // successful loads should clear the error
        XMLDocument doc;
        XMLTest( "Should be no error initially", false, doc.Error() );
        doc.LoadFile( "resources/no-such-file.xml" );
        XMLTest( "No such file - should fail", true, doc.Error() );

        doc.LoadFile( "resources/dream.xml" );
        XMLTest( "Error should be cleared", false, doc.Error() );
    }

    // ----------- Performance tracking --------------
    {
#if defined( _MSC_VER )
        __int64 start, end, freq;
        QueryPerformanceFrequency( (LARGE_INTEGER*) &freq );
#endif

        FILE* fp  = fopen( "resources/dream.xml", "r" );
        fseek( fp, 0, SEEK_END );
        long size = ftell( fp );
        fseek( fp, 0, SEEK_SET );

        char* mem = new char[size+1];
        fread( mem, size, 1, fp );
        fclose( fp );
        mem[size] = 0;

#if defined( _MSC_VER )
        QueryPerformanceCounter( (LARGE_INTEGER*) &start );
#else
        clock_t cstart = clock();
#endif
        static const int COUNT = 10;
        for( int i=0; i


  
    what's your name?
  
  
    How old are you?
  
  
    when is your birthday?
  
  
    what's your gender?
    
    
      Male
      
        
      
    
    
      Female
      
        
      
    
  
  
    Are you happy?
  
  
    Thanks for your time!
  

讨论帖：
如何设计自己的类和tinyxml2交互：(观察者模式访问节点)
如何访问xml中所有标签为label的内容：
递归解析应该怎么写
stl怎么用来交互
如何不用递归，解析出xml中所有Question节点的属性跟子节点
]]-->;>

Original: https://www.cnblogs.com/wangyaning/p/7853966.html
Author: wangyaning
Title: 推荐一个优秀的c++源代码，TinyXml2