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pcg |
1.1 |
#!/usr/bin/perl |
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print <<EOF; |
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pcg |
1.6 |
// THIS IS A GENERATED FILE: RUN callback.pl to regenerate it |
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// THIS IS A GENERATED FILE: callback.pl is part of the GVPE |
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// THIS IS A GENERATED FILE: distribution. |
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pcg |
1.1 |
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/* |
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callback.h -- C++ callback mechanism |
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pcg |
1.6 |
Copyright (C) 2003-2005 Marc Lehmann <pcg\@goof.com> |
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pcg |
1.1 |
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pcg |
1.4 |
This file is part of GVPE. |
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GVPE is free software; you can redistribute it and/or modify |
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pcg |
1.1 |
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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pcg |
1.4 |
along with gvpe; if not, write to the Free Software |
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pcg |
1.5 |
Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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pcg |
1.1 |
*/ |
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pcg |
1.3 |
#ifndef CALLBACK_H__ |
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#define CALLBACK_H__ |
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pcg |
1.1 |
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EOF |
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for my $a (0..7) { |
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my $CLASS = join "", map ", class A$_", 1..$a; |
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my $TYPE = join ", ", map "A$_", 1..$a; |
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my $ARG = join ", ", map "a$_", 1..$a; |
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my $TYPEARG = join ", ", map "A$_ a$_", 1..$a; |
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my $_ARG = $ARG ? ", $ARG" : ""; |
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my $_TYPEARG = $TYPEARG ? ", $TYPEARG" : ""; |
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print <<EOF; |
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template<class R$CLASS> |
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class callback$a { |
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struct object { }; |
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void *obj; |
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R (object::*meth)($TYPE); |
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/* a proxy is a kind of recipe on how to call a specific class method */ |
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struct proxy_base { |
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virtual R call (void *obj, R (object::*meth)($TYPE)$_TYPEARG) = 0; |
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}; |
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template<class O1, class O2> |
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struct proxy : proxy_base { |
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virtual R call (void *obj, R (object::*meth)($TYPE)$_TYPEARG) |
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{ |
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((reinterpret_cast<O1 *>(obj)) ->* (reinterpret_cast<R (O2::*)($TYPE)>(meth))) |
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($ARG); |
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} |
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}; |
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proxy_base *prxy; |
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public: |
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template<class O1, class O2> |
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callback$a (O1 *object, R (O2::*method)($TYPE)) |
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{ |
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static proxy<O1,O2> p; |
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obj = reinterpret_cast<void *>(object); |
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meth = reinterpret_cast<R (object::*)($TYPE)>(method); |
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prxy = &p; |
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} |
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R call($TYPEARG) const |
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{ |
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return prxy->call (obj, meth$_ARG); |
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} |
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R operator ()($TYPEARG) const |
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{ |
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return call ($ARG); |
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} |
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}; |
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EOF |
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} |
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print <<EOF |
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#endif |
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EOF |
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