text: // Copyright (C) 2002-2012 Nikolaus Gebhardt
  // This file is part of the "Irrlicht Engine".
  // For conditions of distribution and use, see copyright notice in irrlicht.h
  
  #include "CWriteFile.h"
  #include <stdio.h>
  
  namespace irr
  {
  namespace io
  {
  
  
  CWriteFile::CWriteFile(const io::path& fileName, bool append)
  : FileSize(0)
  {
  	#ifdef _DEBUG
  	setDebugName("CWriteFile");
  	#endif
  
  	Filename = fileName;
  	openFile(append);
  }
  
  
  
  CWriteFile::~CWriteFile()
  {
  	if (File)
  		fclose(File);
  }
  
  
  
  //! returns if file is open
  inline bool CWriteFile::isOpen() const
  {
  	return File != 0;
  }
  
  
  
  //! returns how much was read
  s32 CWriteFile::write(const void* buffer, u32 sizeToWrite)
  {
  	if (!isOpen())
  		return 0;
  
  	return (s32)fwrite(buffer, 1, sizeToWrite, File);
  }
  
  
  
  //! changes position in file, returns true if successful
  //! if relativeMovement==true, the pos is changed relative to current pos,
  //! otherwise from begin of file
  bool CWriteFile::seek(long finalPos, bool relativeMovement)
  {
  	if (!isOpen())
  		return false;
  
  	return fseek(File, finalPos, relativeMovement ? SEEK_CUR : SEEK_SET) == 0;
  }
  
  
  
  //! returns where in the file we are.
  long CWriteFile::getPos() const
  {
  	return ftell(File);
  }
  
  
  
  //! opens the file
  void CWriteFile::openFile(bool append)
  {
  	if (Filename.size() == 0)
  	{
  		File = 0;
  		return;
  	}
  
  #if defined(_IRR_WCHAR_FILESYSTEM)
  	File = _wfopen(Filename.c_str(), append ? L"ab" : L"wb");
  #else
  	File = fopen(Filename.c_str(), append ? "ab" : "wb");
  #endif
  
  	if (File)
  	{
  		// get FileSize
  
  		fseek(File, 0, SEEK_END);
  		FileSize = ftell(File);
  		fseek(File, 0, SEEK_SET);
  	}
  }
  
  
  
  //! returns name of file
  const io::path& CWriteFile::getFileName() const
  {
  	return Filename;
  }
  
  
  
  IWriteFile* createWriteFile(const io::path& fileName, bool append)
  {
  	CWriteFile* file = new CWriteFile(fileName, append);
  	if (file->isOpen())
  		return file;
  
  	file->drop();
  	return 0;
  }
  
  
  } // end namespace io
  } // end namespace irr
  
  