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logserverstreambuf.h

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00001 /* -*- mode: c++; c-basic-offset: 4; indent-tabs-mode: nil -*-
00002 
00003    this file is part of rcssserver3D
00004    Fri May 9 2003
00005    Copyright (C) 2002,2003 Koblenz University
00006    Copyright (C) 2003 RoboCup Soccer Server 3D Maintenance Group
00007    $Id: logserverstreambuf.h,v 1.4 2005/05/18 14:55:21 jamu Exp $
00008 
00009    This program is free software; you can redistribute it and/or modify
00010    it under the terms of the GNU General Public License as published by
00011    the Free Software Foundation; version 2 of the License.
00012 
00013    This program is distributed in the hope that it will be useful,
00014    but WITHOUT ANY WARRANTY; without even the implied warranty of
00015    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00016    GNU General Public License for more details.
00017 
00018    You should have received a copy of the GNU General Public License
00019    along with this program; if not, write to the Free Software
00020    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
00021 */
00022 #ifndef ZEITGEIST_LOGSERVERSTREAMBUF_H
00023 #define ZEITGEIST_LOGSERVERSTREAMBUF_H
00024 
00048 #include <functional>
00049 #include <vector>
00050 #include <streambuf>
00051 
00052 namespace zeitgeist
00053 {
00054 
00055 class LogServerStreamBuf : public std::streambuf
00056 {
00057     // types
00058     //
00059 protected:
00060     typedef std::char_traits<char>      TTraitsType;
00061     typedef traits_type::int_type       TIntType;
00062 
00063 private:
00064     typedef std::pair<unsigned int, std::ostream*> TMaskStream;
00065     typedef std::vector<TMaskStream> TMaskStreams;
00066 
00067     // functions
00068     //
00069 public:
00070     LogServerStreamBuf(unsigned int size);
00071     virtual ~LogServerStreamBuf();
00072 
00082     void AddStream(std::ostream *stream, unsigned int mask);
00087     bool RemoveStream(const std::ostream *stream);
00093     bool SetPriorityMask(const std::ostream *stream, unsigned int mask);
00098     unsigned int GetPriorityMask(const std::ostream *stream) const;
00099 
00108     void SetCurrentPriority(unsigned int priority);
00109 
00110 protected:
00111     // these functions implement the streambuf interface ... handle with care
00112     TIntType    overflow(TIntType c);
00113     int                 sync();
00114 
00115 private:
00116     LogServerStreamBuf(const LogServerStreamBuf &obj);
00117     LogServerStreamBuf& operator=(const LogServerStreamBuf &obj);
00118 
00120     void Forward(const char *buffer, unsigned int length);
00122     void PutBuffer();
00124     void PutChar(TIntType chr);
00125 
00127     class MaskStreamEQ : public std::unary_function<TMaskStream, bool>
00128     {
00129     private:
00130         const std::ostream      *stream;
00131     public:
00132         explicit MaskStreamEQ(const std::ostream *str) : stream(str) {}
00133         bool operator ()(const TMaskStream &ms)
00134         { return ms.second == stream; }
00135     };
00136 
00137     // members
00138     //
00139 private:
00141     unsigned int    mSize;
00142     unsigned int    mCurrentPriority;
00143     TMaskStreams     mStreams;
00144 };
00145 
00146 } //namespace
00147 
00148 #endif // ZEITGEIST_LOGSERVERSTREAMBUF_H

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