/usr/include/gnash/asobj/builtin_function.h is in gnash-dev 0.8.11~git20160109-1build1.
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// Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
// Free Software Foundation, Inc
//
// 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 3 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#ifndef GNASH_BUILTIN_FUNCTION_H
#define GNASH_BUILTIN_FUNCTION_H
#include "UserFunction.h"
#include <cassert>
namespace gnash {
class fn_call;
}
namespace gnash {
/// This is a special type of function implementing AS-code in C++
//
/// Many functions (including classes) are implemented in ActionScript in
/// the reference player. Gnash implements them in C++, but they must
/// be treated like swf-defined functions.
//
/// They are distinct from NativeFunctions, which are part of the player and
/// do not go through the ActionScript interpreter.
class builtin_function : public UserFunction
{
typedef as_value (*ASFunction)(const fn_call& fn);
public:
/// Construct a builtin function/class with a default interface
//
/// The default interface will have a constructor member set as 'this'
///
/// @param func
/// The C function to call when this as_function is invoked.
/// For classes, the function pointer is the constructor.
builtin_function(Global_as& gl, ASFunction func)
:
UserFunction(gl),
_func(func)
{
}
/// Return the number of registers required for function execution
//
/// Gnash's C++ implementations of AS functions don't need any registers!
virtual std::uint8_t registers() const {
return 0;
}
/// Invoke this function or this Class constructor
virtual as_value call(const fn_call& fn)
{
FrameGuard guard(getVM(fn), *this);
assert(_func);
return _func(fn);
}
bool isBuiltin() { return true; }
private:
ASFunction _func;
};
} // end of gnash namespace
#endif
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