//
  // StreamUtil.h
  //
  // $Id:\; //poco/1.3/Foundation/include/Poco/StreamUtil.h\#2$
  //
  // Library: Foundation
  // Package: Streams
  // Module:  StreamUtil
  //
  // Stream implementation support.
  //
  // Copyright (c) 2005-2006, Applied Informatics Software Engineering GmbH.
  // and Contributors.
  //
  // Permission is hereby granted, free of charge, to any person or organization
  // obtaining a copy of the software and accompanying documentation covered by
  // this license (the "Software") to use, reproduce, display, distribute,
  // execute, and transmit the Software, and to prepare derivative works of the
  // Software, and to permit third-parties to whom the Software is furnished to
  // do so, all subject to the following:
  // 
  // The copyright notices in the Software and this entire statement, including
  // the above license grant, this restriction and the following disclaimer,
  // must be included in all copies of the Software, in whole or in part, and
  // all derivative works of the Software, unless such copies or derivative
  // works are solely in the form of machine-executable object code generated by
  // a source language processor.
  // 
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
  // SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
  // FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
  // ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  // DEALINGS IN THE SOFTWARE.
  //
  
  ifndef Foundation_StreamUtil_INCLUDED
  define Foundation_StreamUtil_INCLUDED
  
  include "Poco/Foundation.h"
  
  // poco_ios_init
  //
  // This is a workaround for a bug in the Dinkumware
  // implementation of iostreams.
  //
  // Calling basic_ios::init() multiple times for the
  // same basic_ios instance results in a memory leak
  // caused by the ios' locale being allocated more than
  // once, each time overwriting the old pointer.
  // This usually occurs in the following scenario:
  //
  // class MyStreamBuf: public std::streambuf
  // {
  //     ...
  // };
  //
  // class MyIOS: public virtual std::ios
  // {
  // public:
  //     MyIOS()
  //     {
  //         init(&_buf);
  //     }
  // protected:
  //     MyStreamBuf _buf;
  // };
  //
  // class MyIStream: public MyIOS, public std::istream
  // {
  //     ...
  // };
  //
  // In this scenario, std::ios::init() is called twice
  // (the first time by the MyIOS constructor, the second
  // time by the std::istream constructor), resulting in 
  // two locale objects being allocated, the pointer second 
  // one overwriting the pointer to the first one and thus 
  // causing a memory leak.
  // 
  // The workaround is to call init() only once for each
  // stream object - by the istream, ostream or iostream
  // constructor, and not calling init() in ios-derived
  // base classes.
  //
  // Some stream implementations, however, require that
  // init() is called in the MyIOS constructor.
  // Therefore we replace each call to init() with
  // the poco_ios_init macro defined below.
  
  if !defined(POCO_IOS_INIT_HACK)
          // Microsoft Visual Studio with Dinkumware STL (but not STLport)
  #        if defined(_MSC_VER) && (!defined(_STLP_MSVC) || defined(_STLP_NO_OWN_IOSTREAMS))
  #                define POCO_IOS_INIT_HACK 1
      // QNX with Dinkumware but not GNU C++ Library
  #        elif defined(__QNX__) && !defined(__GLIBCPP__)
  #                define POCO_IOS_INIT_HACK 1
  #        endif
  endif
  
  if defined(POCO_IOS_INIT_HACK)
  #        define poco_ios_init(buf)
  else
  #        define poco_ios_init(buf) init(buf)
  endif
  
  endif // Foundation_StreamUtil_INCLUDED