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/*
Copyright (C) 1998-99 Paul Barton-Davis
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __libmisc_transmitter_h__
#define __libmisc_transmitter_h__
#include <sstream>
#include <iostream>
#include <pbd/signals.h>
#include "pbd/libpbd_visibility.h"
class LIBPBD_API Transmitter : public std::stringstream
{
public:
enum Channel {
Info,
Error,
Warning,
Fatal,
Throw
};
Transmitter (Channel);
PBD::Signal2<void,Channel, const char *> &sender() {
return *send;
}
bool does_not_return ();
protected:
virtual void deliver ();
friend std::ostream& endmsg (std::ostream &);
private:
Channel channel;
PBD::Signal2<void, Channel, const char *> *send;
PBD::Signal2<void, Channel, const char *> info;
PBD::Signal2<void, Channel, const char *> warning;
PBD::Signal2<void, Channel, const char *> error;
PBD::Signal2<void, Channel, const char *> fatal;
};
/* for EGCS 2.91.66, if this function is not compiled within the same
compilation unit as the one where a ThrownError is thrown, then
nothing will catch the error. This is a pretty small function, so
inlining it here seems like a reasonable workaround.
*/
inline std::ostream &
endmsg (std::ostream &ostr)
{
Transmitter *t;
/* There is a serious bug in the Cygnus/GCC libstdc++ library:
cout is not actually an ostream, but a trick was played
to make the compiler think that it is. This will cause
the dynamic_cast<> to fail with SEGV. So, first check to
see if ostr == cout, and handle it specially.
*/
if (&ostr == &std::cout) {
std::cout << std::endl;
return ostr;
} else if (&ostr == &std::cerr) {
std::cerr << std::endl;
return ostr;
}
if ((t = dynamic_cast<Transmitter *> (&ostr)) != 0) {
t->deliver ();
} else {
/* hmm. not a Transmitter, so just put a newline on
it and assume that that will be enough.
*/
ostr << std::endl;
}
return ostr;
}
extern "C" { LIBPBD_API void pbd_c_error (const char *); }
#endif // __libmisc_transmitter_h__
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