tee_output_stream.hh

00001 /* vim: set sw=4 sts=4 et foldmethod=syntax : */
00002 
00003 /*
00004  * Copyright (c) 2008, 2009 Ciaran McCreesh
00005  *
00006  * This file is part of the Paludis package manager. Paludis is free software;
00007  * you can redistribute it and/or modify it under the terms of the GNU General
00008  * Public License version 2, as published by the Free Software Foundation.
00009  *
00010  * Paludis is distributed in the hope that it will be useful, but WITHOUT ANY
00011  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
00012  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
00013  * details.
00014  *
00015  * You should have received a copy of the GNU General Public License along with
00016  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
00017  * Place, Suite 330, Boston, MA  02111-1307  USA
00018  */
00019 
00020 #ifndef PALUDIS_GUARD_PALUDIS_UTIL_TEE_OUTPUT_STREAM_HH
00021 #define PALUDIS_GUARD_PALUDIS_UTIL_TEE_OUTPUT_STREAM_HH 1
00022 
00023 #include <paludis/util/tee_output_stream-fwd.hh>
00024 #include <paludis/util/attributes.hh>
00025 #include <paludis/util/private_implementation_pattern.hh>
00026 #include <ostream>
00027 
00028 namespace paludis
00029 {
00030     class PALUDIS_VISIBLE TeeOutputStreamBuf :
00031         public std::streambuf,
00032         private PrivateImplementationPattern<TeeOutputStreamBuf>
00033     {
00034         protected:
00035             virtual int_type
00036             overflow(int_type c);
00037 
00038             virtual std::streamsize
00039             xsputn(const char * s, std::streamsize num);
00040 
00041         public:
00042             TeeOutputStreamBuf();
00043             ~TeeOutputStreamBuf();
00044 
00045             void add_stream(std::ostream * const);
00046     };
00047 
00048     class PALUDIS_VISIBLE TeeOutputStreamBase
00049     {
00050         protected:
00051             TeeOutputStreamBuf buf;
00052     };
00053 
00054     class PALUDIS_VISIBLE TeeOutputStream :
00055         protected TeeOutputStreamBase,
00056         public std::ostream
00057     {
00058         public:
00059             ///\name Basic operations
00060             ///\{
00061 
00062             TeeOutputStream();
00063 
00064             ///\}
00065 
00066             void add_stream(std::ostream * const);
00067     };
00068 
00069 #ifdef PALUDIS_HAVE_EXTERN_TEMPLATE
00070     extern template class PrivateImplementationPattern<TeeOutputStreamBuf>;
00071 #endif
00072 }
00073 
00074 #endif

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