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/* Copyright (C) 2010 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/>.
*/
#ifndef INCLUDED_SCRIPTVAL
#define INCLUDED_SCRIPTVAL
#include "ScriptTypes.h"
#include <boost/shared_ptr.hpp>
/**
* A trivial wrapper around a jsval. Used to avoid template overload ambiguities
* with jsval (which is just an integer), for any code that uses
* ScriptInterface::ToJSVal or ScriptInterface::FromJSVal
*/
class CScriptVal
{
public:
CScriptVal() : m_Val(JSVAL_VOID) { }
CScriptVal(jsval val) : m_Val(val) { }
/**
* Returns the current value.
*/
const jsval& get() const { return m_Val; }
/**
* Returns whether the value is JSVAL_VOID.
*/
bool undefined() const { return JSVAL_IS_VOID(m_Val) ? true : false; }
private:
jsval m_Val;
};
class CScriptValRooted
{
public:
CScriptValRooted() { }
CScriptValRooted(JSContext* cx, jsval val);
CScriptValRooted(JSContext* cx, CScriptVal val);
/**
* Returns the current value (or JSVAL_VOID if uninitialised).
*/
jsval get() const;
/**
* Returns reference to the current value.
* Fails if the value is not yet initialised.
*/
jsval& getRef() const;
/**
* Returns whether the value is uninitialised or is JSVAL_VOID.
*/
bool undefined() const;
/**
* Returns whether the value is uninitialised.
*/
bool uninitialised() const;
private:
boost::shared_ptr<jsval> m_Val;
};
/**
* RAII wrapper for JSIdArray*
*/
class AutoJSIdArray
{
NONCOPYABLE(AutoJSIdArray);
public:
AutoJSIdArray(JSContext* cx, JSIdArray* ida);
~AutoJSIdArray();
JSIdArray* get() const;
size_t length() const;
jsid operator[](size_t i) const;
private:
JSContext* m_Context;
JSIdArray* m_IdArray;
};
#endif // INCLUDED_SCRIPTVAL
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