110 lines
2.6 KiB
C++
110 lines
2.6 KiB
C++
/*
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Copyright (C) 1998-99 Paul Barton-Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id$
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*/
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#ifndef __libmisc_transmitter_h__
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#define __libmisc_transmitter_h__
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#include <sstream>
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#include <iostream>
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#include <sigc++/sigc++.h>
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using std::cout;
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using std::cerr;
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using std::endl;
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class Transmitter : public std::stringstream
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{
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public:
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enum Channel {
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Info,
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Error,
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Warning,
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Fatal,
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Throw
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};
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Transmitter (Channel);
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sigc::signal<void,Channel, const char *> &sender() {
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return *send;
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}
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bool does_not_return ();
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protected:
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virtual void deliver ();
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friend std::ostream& endmsg (std::ostream &);
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private:
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Channel channel;
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sigc::signal<void, Channel, const char *> *send;
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sigc::signal<void, Channel, const char *> info;
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sigc::signal<void, Channel, const char *> warning;
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sigc::signal<void, Channel, const char *> error;
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sigc::signal<void, Channel, const char *> fatal;
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};
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/* for EGCS 2.91.66, if this function is not compiled within the same
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compilation unit as the one where a ThrownError is thrown, then
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nothing will catch the error. This is a pretty small function, so
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inlining it here seems like a reasonable workaround.
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*/
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inline std::ostream &
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endmsg (std::ostream &ostr)
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{
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Transmitter *t;
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/* There is a serious bug in the Cygnus/GCC libstdc++ library:
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cout is not actually an ostream, but a trick was played
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to make the compiler think that it is. This will cause
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the dynamic_cast<> to fail with SEGV. So, first check to
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see if ostr == cout, and handle it specially.
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*/
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if (&ostr == &cout) {
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cout << endl;
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return ostr;
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} else if (&ostr == &cerr) {
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cerr << endl;
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return ostr;
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}
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if ((t = dynamic_cast<Transmitter *> (&ostr)) != 0) {
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t->deliver ();
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} else {
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/* hmm. not a Transmitter, so just put a newline on
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it and assume that that will be enough.
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*/
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ostr << endl;
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}
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return ostr;
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}
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extern "C" { void pbd_c_error (const char *); }
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#endif // __libmisc_transmitter_h__
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