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forked from 0ad/0ad
0ad/source/scriptinterface/NativeWrapperDefns.h
Ykkrosh 7c2e9027c2 # Rewrite of the game's simulation system
Giant merge from
http://svn.wildfiregames.com/hg-source/file/5fb522019d5e
Infrastructure is largely complete, gameplay is largely missing
Disabled by default; use command-line flag "-sim2"
(Second attempt at commit...)

This was SVN commit r7259.
2010-01-09 19:20:14 +00:00

117 lines
4.2 KiB
C++

/* Copyright (C) 2009 Wildfire Games.
* This file is part of 0 A.D.
*
* 0 A.D. 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.
*
* 0 A.D. 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 0 A.D. If not, see <http://www.gnu.org/licenses/>.
*/
// (NativeWrapperDecls.h set up a lot of the macros we use here)
// ScriptInterface_NativeWrapper<T>::call(cx, rval, fptr, args...) will call fptr(cbdata, args...),
// and if T != void then it will store the result in rval:
// Templated on the return type so void can be handled separately
template <typename R>
struct ScriptInterface_NativeWrapper {
#define OVERLOADS(z, i, data) \
template<TYPENAME_T0_HEAD(z,i) typename F> \
static void call(JSContext* cx, jsval& rval, F fptr T0_A0(z,i)) { \
rval = ScriptInterface::ToJSVal<R>(cx, fptr(ScriptInterface::GetCallbackData(cx) A0_TAIL(z,i))); \
}
BOOST_PP_REPEAT(SCRIPT_INTERFACE_MAX_ARGS, OVERLOADS, ~)
#undef OVERLOADS
};
// Overloaded to ignore the return value from void functions
template <>
struct ScriptInterface_NativeWrapper<void> {
#define OVERLOADS(z, i, data) \
template<TYPENAME_T0_HEAD(z,i) typename F> \
static void call(JSContext* cx, jsval& /*rval*/, F fptr T0_A0(z,i)) { \
fptr(ScriptInterface::GetCallbackData(cx) A0_TAIL(z,i)); \
}
BOOST_PP_REPEAT(SCRIPT_INTERFACE_MAX_ARGS, OVERLOADS, ~)
#undef OVERLOADS
};
// Same idea but for method calls:
template <typename R, typename TC>
struct ScriptInterface_NativeMethodWrapper {
#define OVERLOADS(z, i, data) \
template<TYPENAME_T0_HEAD(z,i) typename F> \
static void call(JSContext* cx, jsval& rval, TC* c, F fptr T0_A0(z,i)) { \
rval = ScriptInterface::ToJSVal<R>(cx, (c->*fptr)( A0(z,i) )); \
}
BOOST_PP_REPEAT(SCRIPT_INTERFACE_MAX_ARGS, OVERLOADS, ~)
#undef OVERLOADS
};
template <typename TC>
struct ScriptInterface_NativeMethodWrapper<void, TC> {
#define OVERLOADS(z, i, data) \
template<TYPENAME_T0_HEAD(z,i) typename F> \
static void call(JSContext* /*cx*/, jsval& /*rval*/, TC* c, F fptr T0_A0(z,i)) { \
(c->*fptr)( A0(z,i) ); \
}
BOOST_PP_REPEAT(SCRIPT_INTERFACE_MAX_ARGS, OVERLOADS, ~)
#undef OVERLOADS
};
// JSNative-compatible function that wraps the function identified in the template argument list
#define OVERLOADS(z, i, data) \
template <typename R, TYPENAME_T0_HEAD(z,i) R (*fptr) ( void* T0_TAIL(z,i) )> \
JSBool ScriptInterface::call(JSContext* cx, JSObject* /*obj*/, uintN /*argc*/, jsval* argv, jsval* rval) { \
(void)argv; /* avoid 'unused parameter' warnings */ \
BOOST_PP_REPEAT_##z (i, CONVERT_ARG, ~) \
ScriptInterface_NativeWrapper<R>::call(cx, *rval, fptr A0_TAIL(z,i)); \
return (ScriptInterface::IsExceptionPending(cx) ? JS_FALSE : JS_TRUE); \
}
BOOST_PP_REPEAT(SCRIPT_INTERFACE_MAX_ARGS, OVERLOADS, ~)
#undef OVERLOADS
// Same idea but for methods
#define OVERLOADS(z, i, data) \
template <typename R, TYPENAME_T0_HEAD(z,i) JSClass* CLS, typename TC, R (TC::*fptr) ( T0(z,i) )> \
JSBool ScriptInterface::callMethod(JSContext* cx, JSObject* obj, uintN /*argc*/, jsval* argv, jsval* rval) { \
(void)argv; /* avoid 'unused parameter' warnings */ \
if (ScriptInterface::GetClass(cx, obj) != CLS) return JS_FALSE; \
TC* c = static_cast<TC*>(ScriptInterface::GetPrivate(cx, obj)); \
if (! c) return JS_FALSE; \
BOOST_PP_REPEAT_##z (i, CONVERT_ARG, ~) \
ScriptInterface_NativeMethodWrapper<R, TC>::call(cx, *rval, c, fptr A0_TAIL(z,i)); \
return (ScriptInterface::IsExceptionPending(cx) ? JS_FALSE : JS_TRUE); \
}
BOOST_PP_REPEAT(SCRIPT_INTERFACE_MAX_ARGS, OVERLOADS, ~)
#undef OVERLOADS
// Clean up our mess
#undef NUMBERED_LIST_HEAD
#undef NUMBERED_LIST_TAIL
#undef NUMBERED_LIST_BALANCED
#undef TYPED_ARGS
#undef CONVERT_ARG
#undef TYPENAME_T0_HEAD
#undef TYPENAME_T0_TAIL
#undef T0
#undef T0_HEAD
#undef T0_TAIL
#undef T0_A0
#undef A0
#undef A0_TAIL