tinyxml2.h

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/*
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.
*/
/*
This file has been modified from its original version by Amazon:
  (1) Memory management operations use aws memory management api
  (2) Import-export preproccesor logic tweaked for better integration into core library
  (3) Wrapped everything in Amazon namespace to prevent static linking issues if the user includes a version of this code through another dependency
*/
#ifndef TINYXML2_INCLUDED
#define TINYXML2_INCLUDED

#if defined(ANDROID_NDK) || defined(__BORLANDC__) || defined(__QNXNTO__)
#   include <ctype.h>
#   include <limits.h>
#   include <stdio.h>
#   include <stdlib.h>
#   include <string.h>
#   include <stdarg.h>
#else
#   include <cctype>
#   include <climits>
#   include <cstdio>
#   include <cstdlib>
#   include <cstring>
#   include <cstdarg>
#endif

#include <aws/core/utils/memory/AWSMemory.h>

/*
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 USE_IMPORT_EXPORT
        #ifdef AWS_CORE_EXPORTS
            #define TINYXML2_LIB __declspec(dllexport)
        #else
            #define TINYXML2_LIB __declspec(dllimport)
        #endif // AWS_CORE_EXPORTS
    #endif // USE_IMPORT_EXPORT
#endif

#ifndef TINYXML2_LIB
    #define TINYXML2_LIB
#endif // TINYXML2_LIB


#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 <android/log.h>
#       define TIXMLASSERT( x )           if ( !(x)) { __android_log_assert( "assert", "grinliz", "ASSERT in '%s' at %d.", __FILE__, __LINE__ ); }
#   else
#       include <assert.h>
#       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 = 2;
static const int TIXML2_MINOR_VERSION = 2;
static const int TIXML2_PATCH_VERSION = 0;

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

  static const char* ALLOCATION_TAG = "AWS::TinyXML";

  /*
  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 TINYXML2_LIB 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<char*>(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 T, int INIT>
  class DynArray
  {
  public:
    DynArray() {
      _mem = _pool;
      _allocated = INIT;
      _size = 0;
    }

    ~DynArray() {
      if (_mem != _pool) {
        Aws::DeleteArray<T>(_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 <= INT_MAX - count);
      EnsureCapacity(_size + count);
      T* ret = &_mem[_size];
      _size += count;
      return ret;
    }

    T Pop() {
      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 <= INT_MAX / 2);
        int newAllocated = cap * 2;
        T* newMem = Aws::NewArray<T>(newAllocated, ALLOCATION_TAG);
        memcpy(newMem, _mem, sizeof(T)*_size);  // warning: not using constructors, only works for PODs
        if (_mem != _pool) {
          Aws::DeleteArray<T>(_mem);
        }
        _mem = newMem;
        _allocated = newAllocated;
      }
    }

    T*  _mem;
    T   _pool[INIT];
    int _allocated;     // objects allocated
    int _size;          // number objects in use
  };


  /*
  Parent virtual class of a pool for fast allocation
  and deallocation of objects.
  */
  class MemPool
  {
  public:
    MemPool() {}
    virtual ~MemPool() {}

    virtual int ItemSize() const = 0;
    virtual void* Alloc() = 0;
    virtual void Free(void*) = 0;
    virtual void SetTracked() = 0;
    virtual void Clear() = 0;
  };


  /*
  Template child class to create pools of the correct type.
  */
  template< int SIZE >
  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();
        Aws::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 = Aws::New<Block>(ALLOCATION_TAG);
        _blockPtrs.Push(block);

        for (int i = 0; i<COUNT - 1; ++i) {
          block->chunk[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<Chunk*>(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;
  };



  class TINYXML2_LIB XMLVisitor
  {
  public:
    virtual ~XMLVisitor() {}

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

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

    virtual bool Visit(const XMLDeclaration& /*declaration*/)       {
      return true;
    }
    virtual bool Visit(const XMLText& /*text*/)                 {
      return true;
    }
    virtual bool Visit(const XMLComment& /*comment*/)               {
      return true;
    }
    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<char*>(SkipWhiteSpace(const_cast<const char*>(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<unsigned char>(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<nChar) {
        ++p;
        ++q;
        ++n;
      }
      if ((n == nChar) || (*p == 0 && *q == 0)) {
        return true;
      }
      return false;
    }

    inline static bool IsUTF8Continuation(const char p) {
      return (p & 0x80) != 0;
    }

    static const char* ReadBOM(const char* p, bool* hasBOM);
    // p is the starting location,
    // the UTF-8 value of the entity will be placed in value, and length filled in.
    static const char* GetCharacterRef(const char* p, char* value, int* length);
    static void ConvertUTF32ToUTF8(unsigned long input, char* output, int* length);

    // converts primitive types to strings
    static void ToStr(int v, char* buffer, int bufferSize);
    static void ToStr(unsigned v, char* buffer, int bufferSize);
    static void ToStr(bool v, char* buffer, int bufferSize);
    static void ToStr(float v, char* buffer, int bufferSize);
    static void ToStr(double v, char* buffer, int bufferSize);

    // converts strings to primitive types
    static bool ToInt(const char* str, int* value);
    static bool ToUnsigned(const char* str, unsigned* value);
    static bool ToBool(const char* str, bool* value);
    static bool ToFloat(const char* str, float* value);
    static bool ToDouble(const char* str, double* value);
  };


  class TINYXML2_LIB XMLNode
  {
    friend class XMLDocument;
    friend class XMLElement;
  public:

    const XMLDocument* GetDocument() const  {
      return _document;
    }
    XMLDocument* GetDocument()              {
      return _document;
    }

    virtual XMLElement*     ToElement()     {
      return 0;
    }
    virtual XMLText*        ToText()        {
      return 0;
    }
    virtual XMLComment*     ToComment()     {
      return 0;
    }
    virtual XMLDocument*    ToDocument()    {
      return 0;
    }
    virtual XMLDeclaration* ToDeclaration() {
      return 0;
    }
    virtual XMLUnknown*     ToUnknown()     {
      return 0;
    }

    virtual const XMLElement*       ToElement() const       {
      return 0;
    }
    virtual const XMLText*          ToText() const          {
      return 0;
    }
    virtual const XMLComment*       ToComment() const       {
      return 0;
    }
    virtual const XMLDocument*      ToDocument() const      {
      return 0;
    }
    virtual const XMLDeclaration*   ToDeclaration() const   {
      return 0;
    }
    virtual const XMLUnknown*       ToUnknown() const       {
      return 0;
    }

    const char* Value() const;

    void SetValue(const char* val, bool staticMem = false);

    const XMLNode*  Parent() const          {
      return _parent;
    }

    XMLNode* Parent()                       {
      return _parent;
    }

    bool NoChildren() const                 {
      return !_firstChild;
    }

    const XMLNode*  FirstChild() const      {
      return _firstChild;
    }

    XMLNode*        FirstChild()            {
      return _firstChild;
    }

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

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

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

    XMLNode*        LastChild()                             {
      return const_cast<XMLNode*>(const_cast<const XMLNode*>(this)->LastChild());
    }

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

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

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

    XMLNode*    PreviousSibling()                           {
      return _prev;
    }

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

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

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

    XMLNode*    NextSibling()                               {
      return _next;
    }

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

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

    XMLNode* InsertEndChild(XMLNode* addThis);

    XMLNode* LinkEndChild(XMLNode* addThis) {
      return InsertEndChild(addThis);
    }
    XMLNode* InsertFirstChild(XMLNode* addThis);
    XMLNode* InsertAfterChild(XMLNode* afterThis, XMLNode* addThis);

    void DeleteChildren();

    void DeleteChild(XMLNode* node);

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

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

    virtual bool Accept(XMLVisitor* visitor) const = 0;

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

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

    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
  };


  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;
    }

    void SetCData(bool isCData)         {
      _isCData = isCData;
    }
    bool CData() const                      {
      return _isCData;
    }

    char* ParseDeep(char*, StrPair* endTag);
    virtual XMLNode* ShallowClone(XMLDocument* document) const;
    virtual bool ShallowEqual(const XMLNode* compare) const;

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

  private:
    bool _isCData;

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


  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;

    char* ParseDeep(char*, StrPair* endTag);
    virtual XMLNode* ShallowClone(XMLDocument* document) const;
    virtual bool ShallowEqual(const XMLNode* compare) const;

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

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


  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;

    char* ParseDeep(char*, StrPair* endTag);
    virtual XMLNode* ShallowClone(XMLDocument* document) const;
    virtual bool ShallowEqual(const XMLNode* compare) const;

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

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


  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;

    char* ParseDeep(char*, StrPair* endTag);
    virtual XMLNode* ShallowClone(XMLDocument* document) const;
    virtual bool ShallowEqual(const XMLNode* compare) const;

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

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



  class TINYXML2_LIB XMLAttribute
  {
    friend class XMLElement;
  public:
    const char* Name() const;

    const char* Value() const;

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

    int      IntValue() const               {
      int i = 0;
      QueryIntValue(&i);
      return i;
    }
    unsigned UnsignedValue() const          {
      unsigned i = 0;
      QueryUnsignedValue(&i);
      return i;
    }
    bool     BoolValue() const              {
      bool b = false;
      QueryBoolValue(&b);
      return b;
    }
    double   DoubleValue() const            {
      double d = 0;
      QueryDoubleValue(&d);
      return d;
    }
    float    FloatValue() const             {
      float f = 0;
      QueryFloatValue(&f);
      return f;
    }

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

    void SetAttribute(const char* value);
    void SetAttribute(int value);
    void SetAttribute(unsigned value);
    void SetAttribute(bool value);
    void SetAttribute(double 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;
  };


  class TINYXML2_LIB XMLElement : public XMLNode
  {
    friend class XMLBase;
    friend class XMLDocument;
  public:
    const char* Name() const        {
      return Value();
    }
    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;

    const char* Attribute(const char* name, const char* value = 0) const;

    int      IntAttribute(const char* name) const       {
      int i = 0;
      QueryIntAttribute(name, &i);
      return i;
    }
    unsigned UnsignedAttribute(const char* name) const {
      unsigned i = 0;
      QueryUnsignedAttribute(name, &i);
      return i;
    }
    bool     BoolAttribute(const char* name) const  {
      bool b = false;
      QueryBoolAttribute(name, &b);
      return b;
    }
    double   DoubleAttribute(const char* name) const    {
      double d = 0;
      QueryDoubleAttribute(name, &d);
      return d;
    }
    float    FloatAttribute(const char* name) const {
      float f = 0;
      QueryFloatAttribute(name, &f);
      return f;
    }

    XMLError QueryIntAttribute(const char* name, int* value) const              {
      const XMLAttribute* a = FindAttribute(name);
      if (!a) {
        return XML_NO_ATTRIBUTE;
      }
      return a->QueryIntValue(value);
    }
    XMLError QueryUnsignedAttribute(const char* name, unsigned int* value) const    {
      const XMLAttribute* a = FindAttribute(name);
      if (!a) {
        return XML_NO_ATTRIBUTE;
      }
      return a->QueryUnsignedValue(value);
    }
    XMLError QueryBoolAttribute(const char* name, bool* value) const                {
      const XMLAttribute* a = FindAttribute(name);
      if (!a) {
        return XML_NO_ATTRIBUTE;
      }
      return a->QueryBoolValue(value);
    }
    XMLError QueryDoubleAttribute(const char* name, double* value) const            {
      const XMLAttribute* a = FindAttribute(name);
      if (!a) {
        return XML_NO_ATTRIBUTE;
      }
      return a->QueryDoubleValue(value);
    }
    XMLError QueryFloatAttribute(const char* name, float* value) const          {
      const XMLAttribute* a = FindAttribute(name);
      if (!a) {
        return XML_NO_ATTRIBUTE;
      }
      return a->QueryFloatValue(value);
    }


    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);
    }

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

    void DeleteAttribute(const char* name);

    const XMLAttribute* FirstAttribute() const {
      return _rootAttribute;
    }
    const XMLAttribute* FindAttribute(const char* name) const;

    const char* GetText() const;

    void SetText(const char* inText);
    void SetText(int value);
    void SetText(unsigned value);
    void SetText(bool value);
    void SetText(double value);
    void SetText(float value);

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

    // internal:
    enum {
      OPEN,     // <foo>
      CLOSED,       // <foo/>
      CLOSING       // </foo>
    };
    int ClosingType() const {
      return _closingType;
    }
    char* ParseDeep(char* p, StrPair* endTag);
    virtual XMLNode* ShallowClone(XMLDocument* document) const;
    virtual bool ShallowEqual(const XMLNode* compare) const;

  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<XMLAttribute*>(const_cast<const XMLElement*>(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
  };


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

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

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

    XMLError LoadFile(const char* filename);

    XMLError LoadFile(FILE*);

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

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

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

    bool HasBOM() const {
      return _writeBOM;
    }
    void SetBOM(bool useBOM) {
      _writeBOM = useBOM;
    }

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

    void Print(XMLPrinter* streamer = 0) const;
    virtual bool Accept(XMLVisitor* visitor) const;

    XMLElement* NewElement(const char* name);
    XMLComment* NewComment(const char* comment);
    XMLText* NewText(const char* text);
    XMLDeclaration* NewDeclaration(const char* text = 0);
    XMLUnknown* NewUnknown(const char* text);

    void DeleteNode(XMLNode* node);

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

    bool Error() const {
      return _errorID != XML_NO_ERROR;
    }
    XMLError  ErrorID() const {
      return _errorID;
    }
    const char* ErrorName() const;

    const char* GetErrorStr1() const {
      return _errorStr1;
    }
    const char* GetErrorStr2() const {
      return _errorStr2;
    }
    void PrintError() const;

    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();
  };


  class TINYXML2_LIB XMLHandle
  {
  public:
    XMLHandle(XMLNode* node)                                                {
      _node = node;
    }
    XMLHandle(XMLNode& node)                                                {
      _node = &node;
    }
    XMLHandle(const XMLHandle& ref)                                     {
      _node = ref._node;
    }
    XMLHandle& operator=(const XMLHandle& ref)                          {
      _node = ref._node;
      return *this;
    }

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

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

  private:
    XMLNode* _node;
  };


  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;
  };


  class TINYXML2_LIB XMLPrinter : public XMLVisitor
  {
  public:
    XMLPrinter(FILE* file = 0, bool compact = false, int depth = 0);
    virtual ~XMLPrinter()   {}

    void PushHeader(bool writeBOM, bool writeDeclaration);
    void OpenElement(const char* name, bool compactMode = false);
    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);
    virtual void CloseElement(bool compactMode = false);

    void PushText(const char* text, bool cdata = false);
    void PushText(int value);
    void PushText(unsigned value);
    void PushText(bool value);
    void PushText(float value);
    void PushText(double value);

    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);

    const char* CStr() const {
      return _buffer.Mem();
    }
    int CStrSize() const {
      return _buffer.Size();
    }
    void ClearBuffer() {
      _buffer.Clear();
      _buffer.Push(0);
    }

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

    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
}   // namespace External
}   // namespace Aws

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

#endif // TINYXML2_INCLUDED