ScriptVal.cpp

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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/>.
 */

#include "precompiled.h"

#include "ScriptVal.h"

#include "js/jsapi.h"

struct Unrooter
{
    Unrooter(JSContext* cx) : cx(cx) { }
    void operator()(jsval* p) { JS_RemoveValueRoot(cx, p); delete p; }
    JSContext* cx;
};

CScriptValRooted::CScriptValRooted(JSContext* cx, jsval val)
{
    jsval* p = new jsval(val);
    JS_AddNamedValueRoot(cx, p, "CScriptValRooted");
    m_Val = boost::shared_ptr<jsval>(p, Unrooter(cx));
}

CScriptValRooted::CScriptValRooted(JSContext* cx, CScriptVal val)
{
    jsval* p = new jsval(val.get());
    JS_AddNamedValueRoot(cx, p, "CScriptValRooted");
    m_Val = boost::shared_ptr<jsval>(p, Unrooter(cx));
}

jsval CScriptValRooted::get() const
{
    if (!m_Val)
        return JSVAL_VOID;
    return *m_Val;
}

jsval& CScriptValRooted::getRef() const
{
    ENSURE(m_Val);
    return *m_Val;
}

bool CScriptValRooted::undefined() const
{
    return (!m_Val || JSVAL_IS_VOID(*m_Val));
}

bool CScriptValRooted::uninitialised() const
{
    return !m_Val;
}

AutoJSIdArray::AutoJSIdArray(JSContext* cx, JSIdArray* ida) :
    m_Context(cx), m_IdArray(ida)
{
}

AutoJSIdArray::~AutoJSIdArray()
{
    if (m_IdArray)
        JS_DestroyIdArray(m_Context, m_IdArray);
}

JSIdArray* AutoJSIdArray::get() const
{
    return m_IdArray;
}

size_t AutoJSIdArray::length() const
{
    if (!m_IdArray)
        return 0;
    return m_IdArray->length;
}

jsid AutoJSIdArray::operator[](size_t i) const
{
    if (!(m_IdArray && i < (size_t)m_IdArray->length))
        return JSID_VOID;
    return m_IdArray->vector[i];
}