/*

 * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

 */

#ifndef APICast_h

#define APICast_h

#include "JSAPIValueWrapper.h"

#include "JSGlobalObject.h"

#include "JSValue.h"

#include <wtf/UnusedParam.h>

namespace JSC {

    class ExecState;

    class PropertyNameArray;

    class JSGlobalData;

    class JSObject;

    class JSValue;

}

typedef const struct OpaqueJSContextGroup* JSContextGroupRef;

typedef const struct OpaqueJSContext* JSContextRef;

typedef struct OpaqueJSContext* JSGlobalContextRef;

typedef struct OpaqueJSPropertyNameAccumulator* JSPropertyNameAccumulatorRef;

typedef const struct OpaqueJSValue* JSValueRef;

typedef struct OpaqueJSValue* JSObjectRef;

/* Opaque typing convenience methods */

inline JSC::ExecState* toJS(JSContextRef c)

{

    ASSERT(c);

    return reinterpret_cast<JSC::ExecState*>(const_cast<OpaqueJSContext*>(c));

}

inline JSC::ExecState* toJS(JSGlobalContextRef c)

{

    ASSERT(c);

    return reinterpret_cast<JSC::ExecState*>(c);

}

inline JSC::JSValue toJS(JSC::ExecState* exec, JSValueRef v)

{

    ASSERT_UNUSED(exec, exec);

    ASSERT(v);

#if USE(JSVALUE32_64)

    JSC::JSCell* jsCell = reinterpret_cast<JSC::JSCell*>(const_cast<OpaqueJSValue*>(v));

    if (!jsCell)

        return JSC::JSValue();

    if (jsCell->isAPIValueWrapper())

        return static_cast<JSC::JSAPIValueWrapper*>(jsCell)->value();

    return jsCell;

#else

    return JSC::JSValue::decode(reinterpret_cast<JSC::EncodedJSValue>(const_cast<OpaqueJSValue*>(v)));

#endif

}

inline JSC::JSValue toJSForGC(JSC::ExecState* exec, JSValueRef v)

{

    ASSERT_UNUSED(exec, exec);

    ASSERT(v);

#if USE(JSVALUE32_64)

    JSC::JSCell* jsCell = reinterpret_cast<JSC::JSCell*>(const_cast<OpaqueJSValue*>(v));

    if (!jsCell)

        return JSC::JSValue();

    return jsCell;

#else

    return JSC::JSValue::decode(reinterpret_cast<JSC::EncodedJSValue>(const_cast<OpaqueJSValue*>(v)));

#endif

}

inline JSC::JSObject* toJS(JSObjectRef o)

{

    return reinterpret_cast<JSC::JSObject*>(o);

}

inline JSC::PropertyNameArray* toJS(JSPropertyNameAccumulatorRef a)

{

    return reinterpret_cast<JSC::PropertyNameArray*>(a);

}

inline JSC::JSGlobalData* toJS(JSContextGroupRef g)

{

    return reinterpret_cast<JSC::JSGlobalData*>(const_cast<OpaqueJSContextGroup*>(g));

}

inline JSValueRef toRef(JSC::ExecState* exec, JSC::JSValue v)

{

#if USE(JSVALUE32_64)

    if (!v)

        return 0;

    if (!v.isCell())

        return reinterpret_cast<JSValueRef>(asCell(JSC::jsAPIValueWrapper(exec, v)));

    return reinterpret_cast<JSValueRef>(asCell(v));

#else

    UNUSED_PARAM(exec);

    return reinterpret_cast<JSValueRef>(JSC::JSValue::encode(v));

#endif

}

inline JSObjectRef toRef(JSC::JSObject* o)

{

    return reinterpret_cast<JSObjectRef>(o);

}

inline JSObjectRef toRef(const JSC::JSObject* o)

{

    return reinterpret_cast<JSObjectRef>(const_cast<JSC::JSObject*>(o));

}

inline JSContextRef toRef(JSC::ExecState* e)

{

    return reinterpret_cast<JSContextRef>(e);

}

inline JSGlobalContextRef toGlobalRef(JSC::ExecState* e)

{

    ASSERT(e == e->lexicalGlobalObject()->globalExec());

    return reinterpret_cast<JSGlobalContextRef>(e);

}

inline JSPropertyNameAccumulatorRef toRef(JSC::PropertyNameArray* l)

{

    return reinterpret_cast<JSPropertyNameAccumulatorRef>(l);

}

inline JSContextGroupRef toRef(JSC::JSGlobalData* g)

{

    return reinterpret_cast<JSContextGroupRef>(g);

}

#endif // APICast_h