GroovX: src/tcl/channelbuf.h Source File

00001 
00004 
00005 //
00006 // Copyright (c) 2004-2004 California Institute of Technology
00007 // Copyright (c) 2004-2007 University of Southern California
00008 // Rob Peters <rjpeters at usc dot edu>
00009 //
00010 // created: Wed Jun 30 17:01:08 2004
00011 // commit: $Id: channelbuf.h 10065 2007-04-12 05:54:56Z rjpeters $
00012 // $HeadURL: file:///lab/rjpeters/svnrepo/code/trunk/groovx/src/tcl/channelbuf.h $
00013 //
00014 // --------------------------------------------------------------------
00015 //
00016 // This file is part of GroovX.
00017 //   [http://ilab.usc.edu/rjpeters/groovx/]
00018 //
00019 // GroovX is free software; you can redistribute it and/or modify it
00020 // under the terms of the GNU General Public License as published by
00021 // the Free Software Foundation; either version 2 of the License, or
00022 // (at your option) any later version.
00023 //
00024 // GroovX is distributed in the hope that it will be useful, but
00025 // WITHOUT ANY WARRANTY; without even the implied warranty of
00026 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00027 // General Public License for more details.
00028 //
00029 // You should have received a copy of the GNU General Public License
00030 // along with GroovX; if not, write to the Free Software Foundation,
00031 // Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
00032 //
00034 
00035 #ifndef GROOVX_TCL_CHANNELBUF_H_UTC20050628162420_DEFINED
00036 #define GROOVX_TCL_CHANNELBUF_H_UTC20050628162420_DEFINED
00037 
00038 #include <iostream>
00039 #include <ostream>
00040 #include <streambuf>
00041 #include <tcl.h>
00042 
00043 namespace rutz
00044 {
00045   template <class T> class shared_ptr;
00046 }
00047 
00048 namespace tcl
00049 {
00051   class channel_buf : public std::streambuf
00052   {
00053   private:
00054     bool opened;
00055     bool owned;
00056     int mode;
00057     Tcl_Interp* m_interp;
00058     Tcl_Channel chan;
00059 
00060     channel_buf(const channel_buf&);
00061     channel_buf& operator=(const channel_buf&);
00062 
00063     static const int s_buf_size = 4092;
00064     static const int s_pback_size = 4;
00065     char m_buffer[s_buf_size];
00066 
00067     int flushoutput();
00068 
00069   public:
00070     channel_buf(Tcl_Interp* interp, const char* channame, int om);
00071     ~channel_buf() { close(); }
00072 
00073     bool is_open() { return opened; }
00074 
00075     void ensure_open();
00076 
00077     void close();
00078 
00079     virtual int underflow();
00080 
00081     virtual int overflow(int c);
00082 
00083     virtual int sync();
00084   };
00085 }
00086 
00087 namespace tcl
00088 {
00089   rutz::shared_ptr<std::ostream>
00090   ochanopen(Tcl_Interp* interp,
00091             const char* channame,
00092             std::ios::openmode flags = std::ios::openmode(0));
00093 
00094   rutz::shared_ptr<std::istream>
00095   ichanopen(Tcl_Interp* interp,
00096             const char* channame,
00097             std::ios::openmode flags = std::ios::openmode(0));
00098 }
00099 
00100 static const char __attribute__((used)) vcid_groovx_tcl_channelbuf_h_utc20050628162420[] = "$Id: channelbuf.h 10065 2007-04-12 05:54:56Z rjpeters $ $HeadURL: file:
00101 #endif // !GROOVX_TCL_CHANNELBUF_H_UTC20050628162420_DEFINED