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tinyxml.cpp

/*
Copyright (c) 2000 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 <iostream>
#include <sstream>
#include <fstream>
#include "tinyxml.h"
using namespace std;


bool TiXmlBase::condenseWhiteSpace = true;


void TiXmlBase::PutString( const std::string& str, std::ostream* stream )
{
      // Scan for the all important '&'
      unsigned int i=0, j=0;

      while ( i < str.length() )
      {
            unsigned next = str.find( '&', i );

            if ( next == string::npos )
            {
                  stream->write( &str.at( i ), str.length() - i );
                  return;
            }

            // We found an entity.
            if ( next - i > 0 )
                  stream->write( &str.at( i ), next - i );
            i = next;

            // Check for the special "&#x" entitity
            if (    i < str.length() - 2
                 && str[i] == '&'
                   && str[i+1] == '#'
                   && str[i+2] == 'x' )
            {
                  stream->put( str[i] );
            }
            else
            {
                  for ( j=0; j<NUM_ENTITY; ++j )
                  {
                        if ( str[i] == entity[j].chr )
                        {
                              stream->write( entity[j].str, entity[j].strLength );
                              break;
                        }
                  }
                  if ( j == NUM_ENTITY )
                  {
                        stream->put( str[i] );
                  }
            }
            ++i;
      }
}


TiXmlNode::TiXmlNode( NodeType _type )
{
      parent = 0;
      type = _type;
      firstChild = 0;
      lastChild = 0;
      prev = 0;
      next = 0;
}


TiXmlNode::~TiXmlNode()
{
      TiXmlNode* node = firstChild;
      TiXmlNode* temp = 0;

      while ( node )
      {
            temp = node;
            node = node->next;
            delete temp;
      }     
}


00107 void TiXmlNode::Clear()
{
      TiXmlNode* node = firstChild;
      TiXmlNode* temp = 0;

      while ( node )
      {
            temp = node;
            node = node->next;
            delete temp;
      }     

      firstChild = 0;
      lastChild = 0;
}


TiXmlNode* TiXmlNode::LinkEndChild( TiXmlNode* node )
{
      node->parent = this;
      
      node->prev = lastChild;
      node->next = 0;

      if ( lastChild )
            lastChild->next = node;
      else
            firstChild = node;                  // it was an empty list.

      lastChild = node;
      return node;
}
      

00141 TiXmlNode* TiXmlNode::InsertEndChild( const TiXmlNode& addThis )
{
      TiXmlNode* node = addThis.Clone();
      if ( !node )
            return 0;

      return LinkEndChild( node );
}


00151 TiXmlNode* TiXmlNode::InsertBeforeChild( TiXmlNode* beforeThis, const TiXmlNode& addThis )
{
      if ( beforeThis->parent != this )
            return 0;
      
      TiXmlNode* node = addThis.Clone();
      if ( !node )
            return 0;
      node->parent = this;
      
      node->next = beforeThis;
      node->prev = beforeThis->prev;
      beforeThis->prev->next = node;
      beforeThis->prev = node;
      return node;
}


00169 TiXmlNode* TiXmlNode::InsertAfterChild( TiXmlNode* afterThis, const TiXmlNode& addThis )
{
      if ( afterThis->parent != this )
            return 0;
      
      TiXmlNode* node = addThis.Clone();
      if ( !node )
            return 0;
      node->parent = this;
      
      node->prev = afterThis;
      node->next = afterThis->next;
      afterThis->next->prev = node;
      afterThis->next = node;
      return node;
}


00187 TiXmlNode* TiXmlNode::ReplaceChild( TiXmlNode* replaceThis, const TiXmlNode& withThis )
{
      if ( replaceThis->parent != this )
            return 0;
      
      TiXmlNode* node = withThis.Clone();
      if ( !node )
            return 0;

      node->next = replaceThis->next;
      node->prev = replaceThis->prev;

      if ( replaceThis->next )
            replaceThis->next->prev = node;
      else
            lastChild = node;

      if ( replaceThis->prev )
            replaceThis->prev->next = node;
      else
            firstChild = node;

      delete replaceThis;
      node->parent = this;
      return node;
}


00215 bool TiXmlNode::RemoveChild( TiXmlNode* removeThis )
{
      if ( removeThis->parent != this )
      {     
            assert( 0 );
            return false;
      }
      
      if ( removeThis->next )
            removeThis->next->prev = removeThis->prev;
      else
            lastChild = removeThis->prev;

      if ( removeThis->prev )
            removeThis->prev->next = removeThis->next;
      else
            firstChild = removeThis->next;

      delete removeThis;
      return true;
}


00238 TiXmlNode* TiXmlNode::FirstChild( const std::string& value ) const
{
      TiXmlNode* node;
      for ( node = firstChild; node; node = node->next )
      {
            if ( node->Value() == value )
                  return node;
      }
      return 0;
}


00250 TiXmlNode* TiXmlNode::LastChild( const std::string& value ) const
{
      TiXmlNode* node;
      for ( node = lastChild; node; node = node->prev )
      {
            if ( node->Value() == value )
                  return node;
      }
      return 0;
}


00262 TiXmlNode* TiXmlNode::IterateChildren( TiXmlNode* previous ) const
{
      if ( !previous )
      {
            return FirstChild();
      }
      else
      {
            assert( previous->parent == this );
            return previous->NextSibling();
      }
}


00276 TiXmlNode* TiXmlNode::IterateChildren( const std::string& val, TiXmlNode* previous ) const
{
      if ( !previous )
      {
            return FirstChild( val );
      }
      else
      {
            assert( previous->parent == this );
            return previous->NextSibling( val );
      }
}


00290 TiXmlNode* TiXmlNode::NextSibling( const std::string& value ) const
{
      TiXmlNode* node;
      for ( node = next; node; node = node->next )
      {
            if ( node->Value() == value )
                  return node;
      }
      return 0;
}


00302 TiXmlNode* TiXmlNode::PreviousSibling( const std::string& value ) const
{
      TiXmlNode* node;
      for ( node = prev; node; node = node->prev )
      {
            if ( node->Value() == value )
                  return node;
      }
      return 0;
}


00314 void TiXmlElement::RemoveAttribute( const std::string& name )
{
      TiXmlAttribute* node = attributeSet.Find( name );
      if ( node )
      {
            attributeSet.Remove( node );
            delete node;
      }
}


00325 TiXmlElement* TiXmlNode::FirstChildElement() const
{
      TiXmlNode* node;

      for ( node = FirstChild();
                  node;
                  node = node->NextSibling() )
      {
            if ( node->ToElement() )
                  return node->ToElement();
      }
      return 0;
}


00340 TiXmlElement* TiXmlNode::FirstChildElement( const std::string& value ) const
{
      TiXmlNode* node;

      for ( node = FirstChild( value );
                  node;
                  node = node->NextSibling( value ) )
      {
            if ( node->ToElement() )
                  return node->ToElement();
      }
      return 0;
}


00355 TiXmlElement* TiXmlNode::NextSiblingElement() const
{
      TiXmlNode* node;

      for ( node = NextSibling();
                  node;
                  node = node->NextSibling() )
      {
            if ( node->ToElement() )
                  return node->ToElement();
      }
      return 0;
}


00370 TiXmlElement* TiXmlNode::NextSiblingElement( const std::string& value ) const
{
      TiXmlNode* node;

      for ( node = NextSibling( value );
                  node;
                  node = node->NextSibling( value ) )
      {
            if ( node->ToElement() )
                  return node->ToElement();
      }
      return 0;
}



00386 TiXmlDocument* TiXmlNode::GetDocument() const
{
      const TiXmlNode* node;

      for( node = this; node; node = node->parent )
      {
            if ( node->ToDocument() )
                  return node->ToDocument();
      }
      return 0;
}


// TiXmlElement::TiXmlElement() 
//    : TiXmlNode( TiXmlNode::ELEMENT )
// {
// }

00404 TiXmlElement::TiXmlElement( const std::string& _value ) 
      : TiXmlNode( TiXmlNode::ELEMENT )
{
      firstChild = lastChild = 0;
      value = _value;
}

TiXmlElement::~TiXmlElement()
{
      while( attributeSet.First() )
      {
            TiXmlAttribute* node = attributeSet.First();
            attributeSet.Remove( node );
            delete node;
      }
}

00421 const std::string* TiXmlElement::Attribute( const std::string& name ) const
{
      TiXmlAttribute* node = attributeSet.Find( name );

      if ( node )
            return &(node->Value() );

      return 0;
}


00432 const std::string* TiXmlElement::Attribute( const std::string& name, int* i ) const
{
      const std::string* s = Attribute( name );
      if ( s )
            *i = atoi( s->c_str() );
      else
            *i = 0;
      return s;
}


00443 void TiXmlElement::SetAttribute( const std::string& name, int val )
{     
      char buf[64];
      sprintf( buf, "%d", val );

      std::string v = buf;

      SetAttribute( name, v );
}


00454 void TiXmlElement::SetAttribute( const std::string& name, const std::string& value )
{
      TiXmlAttribute* node = attributeSet.Find( name );
      if ( node )
      {
            node->SetValue( value );
            return;
      }

      TiXmlAttribute* attrib = new TiXmlAttribute( name, value );
      if ( attrib )
      {
            attributeSet.Add( attrib );
      }
      else
      {
            TiXmlDocument* document = GetDocument();
            if ( document ) document->SetError( TIXML_ERROR_OUT_OF_MEMORY );
      }
}


00476 void TiXmlElement::Print( FILE* cfile, int depth ) const
{
      int i;
      for ( i=0; i<depth; i++ )
      {
            fprintf( cfile, "    " );
      }

      fprintf( cfile, "<%s", value.c_str() );

      TiXmlAttribute* attrib;
      for ( attrib = attributeSet.First(); attrib; attrib = attrib->Next() )
      {
            fprintf( cfile, " " );
            attrib->Print( cfile, depth );
      }

      // There are 3 different formatting approaches:
      // 1) An element without children is printed as a <foo /> node
      // 2) An element with only a text child is printed as <foo> text </foo>
      // 3) An element with children is printed on multiple lines.
      TiXmlNode* node;
      if ( !firstChild )
      {
            fprintf( cfile, " />" );
      }
      else if ( firstChild == lastChild && firstChild->ToText() )
      {
            fprintf( cfile, ">" );
            firstChild->Print( cfile, depth + 1 );
            fprintf( cfile, "</%s>", value.c_str() );
      }
      else
      {
            fprintf( cfile, ">" );

            for ( node = firstChild; node; node=node->NextSibling() )
            {
                  if ( !node->ToText() )
                  {
                        fprintf( cfile, "\n" );
                  }
                  node->Print( cfile, depth+1 );
            }
            fprintf( cfile, "\n" );
            for( i=0; i<depth; ++i )
                  fprintf( cfile, "    " );
            fprintf( cfile, "</%s>", value.c_str() );
      }
}


void TiXmlElement::StreamOut( std::ostream* stream ) const
{
      (*stream) << "<" << value;

      TiXmlAttribute* attrib;
      for ( attrib = attributeSet.First(); attrib; attrib = attrib->Next() )
      {     
            (*stream) << " ";
            attrib->StreamOut( stream );
      }

      // If this node has children, give it a closing tag. Else
      // make it an empty tag.
      TiXmlNode* node;
      if ( firstChild )
      {           
            (*stream) << ">";

            for ( node = firstChild; node; node=node->NextSibling() )
            {
                  node->StreamOut( stream );
            }
            (*stream) << "</" << value << ">";
      }
      else
      {
            (*stream) << " />";
      }
}


TiXmlNode* TiXmlElement::Clone() const
{
      TiXmlElement* clone = new TiXmlElement( Value() );

      if ( !clone )
            return 0;
      
      CopyToClone( clone );

      // Clone the attributes, then clone the children.
      TiXmlAttribute* attribute = 0;
      for(  attribute = attributeSet.First(); 
                  attribute; 
                  attribute = attribute->Next() )
      {
            clone->SetAttribute( attribute->Name(), attribute->Value() );
      }
      
      TiXmlNode* node = 0;
      for ( node = firstChild; node; node = node->NextSibling() )
      {
            clone->LinkEndChild( node->Clone() );
      }
      return clone;
}


00586 TiXmlDocument::TiXmlDocument() : TiXmlNode( TiXmlNode::DOCUMENT )
{
      error = false;
//    ignoreWhiteSpace = true;
}


00593 TiXmlDocument::TiXmlDocument( const std::string& documentName ) : TiXmlNode( TiXmlNode::DOCUMENT )
{
//    ignoreWhiteSpace = true;
      value = documentName;
      error = false;
}


00601 bool TiXmlDocument::LoadFile()
{
      return LoadFile( value );
}


00607 bool TiXmlDocument::SaveFile() const
{
      return SaveFile( value );
}


00613 bool TiXmlDocument::LoadFile( const std::string& filename )
{     
      // Delete the existing data:
      Clear();
      value = filename;
      
      FILE* file = fopen( filename.c_str(), "r" );

      if ( file )
      {
            // Get the file size, so we can pre-allocate the string. HUGE speed impact.
            long length = 0;
            fseek( file, 0, SEEK_END );
            length = ftell( file );
            fseek( file, 0, SEEK_SET );

            // If we have a file, assume it is all one big XML file, and read it in.
            // The document parser may decide the document ends sooner than the entire file, however.
            std::string data;
            data.reserve( length );

            const int BUF_SIZE = 2048;
            char buf[BUF_SIZE];

            while( fgets( buf, BUF_SIZE, file ) )
            {
                  data += buf;
            }
            fclose( file );

            Parse( data.c_str() );
            if (  !Error() )
            {
                  return true;
            }
      }
      SetError( TIXML_ERROR_OPENING_FILE );
      return false;
}


00654 bool TiXmlDocument::SaveFile( const std::string& filename ) const
{
      // The old c stuff lives on...
      FILE* fp = fopen( filename.c_str(), "w" );
      if ( fp )
      {
            Print( fp, 0 );
            fclose( fp );
            return true;
      }
      return false;
}


TiXmlNode* TiXmlDocument::Clone() const
{
      TiXmlDocument* clone = new TiXmlDocument();
      if ( !clone )
            return 0;

      CopyToClone( clone );
      clone->error = error;
      clone->errorDesc = errorDesc;

      TiXmlNode* node = 0;
      for ( node = firstChild; node; node = node->NextSibling() )
      {
            clone->LinkEndChild( node->Clone() );
      }
      return clone;
}


00687 void TiXmlDocument::Print( FILE* cfile, int depth ) const
{
      TiXmlNode* node;
      for ( node=FirstChild(); node; node=node->NextSibling() )
      {
            node->Print( cfile, depth );
            fprintf( cfile, "\n" );
      }
}


void TiXmlDocument::StreamOut( std::ostream* out ) const
{
      TiXmlNode* node;
      for ( node=FirstChild(); node; node=node->NextSibling() )
      {
            node->StreamOut( out );

            // Special rule for streams: stop after the root element.
            // The stream in code will only read one element, so don't 
            // write more than one.
            if ( node->ToElement() )
                  break;
      }
}


00714 TiXmlAttribute* TiXmlAttribute::Next() const
{
      // We are using knowledge of the sentinel. The sentinel
      // have a value or name.
      if ( next->value.empty() && next->name.empty() )
            return 0;
      return next;
}


00724 TiXmlAttribute* TiXmlAttribute::Previous() const
{
      // We are using knowledge of the sentinel. The sentinel
      // have a value or name.
      if ( prev->value.empty() && prev->name.empty() )
            return 0;
      return prev;
}


00734 void TiXmlAttribute::Print( FILE* cfile, int /*depth*/ ) const
{
      ostringstream stream( ostringstream::out );
      stream.str().reserve( 500 );
      
      StreamOut( &stream );
      fprintf( cfile, "%s", stream.str().c_str() );
}


void TiXmlAttribute::StreamOut( std::ostream* stream ) const
{
      if ( value.find( '\"' ) != std::string::npos )
      {
            PutString( name, stream );
            (*stream) << "=" << "'";
            PutString( value, stream );
            (*stream) << "'";
      }
      else
      {
            PutString( name, stream );
            (*stream) << "=" << "\"";
            PutString( value, stream );
            (*stream) << "\"";
      }
}


00763 void TiXmlAttribute::SetIntValue( int value )
{
      std::string s;
      std::ostringstream stream( s );
      stream << value;
      SetValue( stream.str() );
}


00772 void TiXmlAttribute::SetDoubleValue( double value )
{
      std::string s;
      std::ostringstream stream( s );
      stream << value;
      SetValue( stream.str() );
}


00781 const int TiXmlAttribute::IntValue() const
{
      int v;
      std::istringstream string( value );
      string >> v;
      return v;
}


00790 const double  TiXmlAttribute::DoubleValue() const
{
      double v;
      std::istringstream string( value );
      string >> v;
      return v;
}


00799 void TiXmlComment::Print( FILE* cfile, int depth ) const
{
      ostringstream stream( ostringstream::out );
      stream.str().reserve( 1000 );
      
      for ( int i=0; i<depth; i++ )
      {
            fprintf( cfile, "    " );
      }
      StreamOut( &stream );
      fprintf( cfile, "%s", stream.str().c_str() );
}


void TiXmlComment::StreamOut( std::ostream* stream ) const
{
      (*stream) << "<!--";
      PutString( value, stream );
      (*stream) << "-->";
}


TiXmlNode* TiXmlComment::Clone() const
{
      TiXmlComment* clone = new TiXmlComment();

      if ( !clone )
            return 0;

      CopyToClone( clone );
      return clone;
}


00833 void TiXmlText::Print( FILE* cfile, int depth ) const
{
      ostringstream stream( ostringstream::out );
      stream.str().reserve( 1000 );
      StreamOut( &stream );
      fprintf( cfile, "%s", stream.str().c_str() );
}


void TiXmlText::StreamOut( std::ostream* stream ) const
{
      PutString( value, stream );
}


TiXmlNode* TiXmlText::Clone() const
{     
      TiXmlText* clone = 0;
      clone = new TiXmlText( "" );
      
      if ( !clone )
            return 0;

      CopyToClone( clone );
      return clone;
}


00861 TiXmlDeclaration::TiXmlDeclaration( const std::string& _version, 
                                                      const std::string& _encoding,
                                                      const std::string& _standalone )
      : TiXmlNode( TiXmlNode::DECLARATION ) 
{
      version = _version;
      encoding = _encoding;
      standalone = _standalone;
}


00872 void TiXmlDeclaration::Print( FILE* cfile, int depth ) const
{
      ostringstream stream( ostringstream::out );
      stream.str().reserve( 200 );
      StreamOut( &stream );
      fprintf( cfile, "%s", stream.str().c_str() );
}


void TiXmlDeclaration::StreamOut( std::ostream* stream ) const
{
      (*stream) << "<?xml ";

      if ( !version.empty() )
      {
            (*stream) << "version=\"";
            PutString( version, stream );
            (*stream) << "\" ";
      }
      if ( !encoding.empty() )
      {
            (*stream) << "encoding=\"";
            PutString( encoding, stream );
            (*stream ) << "\" ";
      }
      if ( !standalone.empty() )
      {
            (*stream) << "standalone=\"";
            PutString( standalone, stream );
            (*stream) << "\" ";
      }
      (*stream) << "?>";
}


TiXmlNode* TiXmlDeclaration::Clone() const
{     
      TiXmlDeclaration* clone = new TiXmlDeclaration();

      if ( !clone )
            return 0;

      CopyToClone( clone );
      clone->version = version;
      clone->encoding = encoding;
      clone->standalone = standalone;
      return clone;
}


00922 void TiXmlUnknown::Print( FILE* cfile, int depth ) const
{
      ostringstream stream( ostringstream::out );
      stream.str().reserve( 200 );
      StreamOut( &stream );

      for ( int i=0; i<depth; i++ )
            fprintf( cfile, "    " );
      fprintf( cfile, "%s", stream.str().c_str() );
}


void TiXmlUnknown::StreamOut( std::ostream* stream ) const
{
      (*stream) << "<" << value << ">";         // Don't use entities hear! It is unknown.
}


TiXmlNode* TiXmlUnknown::Clone() const
{
      TiXmlUnknown* clone = new TiXmlUnknown();

      if ( !clone )
            return 0;

      CopyToClone( clone );
      return clone;
}


TiXmlAttributeSet::TiXmlAttributeSet()
{
      sentinel.next = &sentinel;
      sentinel.prev = &sentinel;
}


TiXmlAttributeSet::~TiXmlAttributeSet()
{
      assert( sentinel.next == &sentinel );
      assert( sentinel.prev == &sentinel );
}


void TiXmlAttributeSet::Add( TiXmlAttribute* addMe )
{
      assert( !Find( addMe->Name() ) );   // Shouldn't be multiply adding to the set.
      
      addMe->next = &sentinel;
      addMe->prev = sentinel.prev;

      sentinel.prev->next = addMe;
      sentinel.prev      = addMe;
}

void TiXmlAttributeSet::Remove( TiXmlAttribute* removeMe )
{
      TiXmlAttribute* node;

      for( node = sentinel.next; node != &sentinel; node = node->next )
      {
            if ( node == removeMe )
            {
                  node->prev->next = node->next;
                  node->next->prev = node->prev;
                  node->next = 0;
                  node->prev = 0;
                  return;
            }
      }
      assert( 0 );            // we tried to remove a non-linked attribute.
}


TiXmlAttribute*   TiXmlAttributeSet::Find( const std::string& name ) const
{
      TiXmlAttribute* node;

      for( node = sentinel.next; node != &sentinel; node = node->next )
      {
            if ( node->Name() == name )
                  return node;
      }
      return 0;
}


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