/*
 * The contents of this file are subject to the Netscape Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/NPL/

 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.

 * The Original Code is Rhino code, released
 * May 6, 1999.

 * The Initial Developer of the Original Code is Netscape
 * Communications Corporation.  Portions created by Netscape are
 * Copyright (C) 1997-1999 Netscape Communications Corporation. All
 * Rights Reserved.

 * Contributor(s): 

 * Alternatively, the contents of this file may be used under the
 * terms of the GNU Public License (the "GPL"), in which case the
 * provisions of the GPL are applicable instead of those above.
 * If you wish to allow use of your version of this file only
 * under the terms of the GPL and not to allow others to use your
 * version of this file under the NPL, indicate your decision by
 * deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL.  If you do not delete
 * the provisions above, a recipient may use your version of this
 * file under either the NPL or the GPL.
 */
/**
 * This class implements the Function native object.
 * See ECMA 15.3.
 */

#ifndef _JS_NATIVE_FUNCTION_H_
#define _JS_NATIVE_FUNCTION_H_

#include "js-scriptableobject.h"
#include "js-function.h"

/* Classes */
class JSNativeFunction: public JSScriptableObject, public JSFunction {
    friend class JSArguments;
    friend class JSNativeDate;
    friend class JSScriptRuntime;
    friend class JSNativeCall;

    protected:
        static const int OFFSET = 4;
        static const int SETBACK = 2;
        static const jsBool_t printSource = FALSE;

        jsString_t      *names;
        int             namesLength;
        short           argCount;
        short           version;
        jsChar_t        *source;
        int             sourceLength;
        JSNativeFunction
                        **nestedFunctions;
        int             nestedFunctionsLength;

    public:
        static  const jsString_t        className;

    protected:
        static  void    finishInit(JSContext *cx, JSScriptable *scope,
                                JSFunctionObject *ctor, JSScriptable *proto);
        /* JS methods */
        static  jsVal_t jsConstructor(JSContext *cx, int numArgs,
                                jsVal_t *args, JSFunction *ctorObj,
                                jsBool_t inNewExpr);
        static  jsVal_t jsFunction_toString(JSContext *cx,
                                JSScriptable *thisObj, int numArgs,
                                jsVal_t *args, JSFunction *funObj);
        static  jsVal_t jsFunction_apply(JSContext *cx,
                                JSScriptable *thisObj, int numArgs,
                                jsVal_t *args, JSFunction *funObj);
        static  jsVal_t jsFunction_call(JSContext *cx,
                                JSScriptable *thisObj, int numArgs,
                                jsVal_t *args, JSFunction *funObj);
        static  double  longBitsToDouble(int64_t bits);

        jsBool_t
                nextIs(int i, int token);
        JSNativeCall *
                getActivation(JSContext *cx);

    public:
        static  void    defineClass(JSContext *cx, JSScriptable *scope);

        JSNativeFunction();

        /* getter, setter */
        jsBool_t
                jsGet_length(JSContext *cx, jsVal_t *value);
        jsBool_t
                jsGet_arity(JSContext *cx, jsVal_t *value);
        jsBool_t
                jsGet_name(JSContext *cx, jsVal_t *value);

        jsString_t
                decompile(JSContext *cx, int indent, jsBool_t topLevel,
                        jsBool_t justBody);
        JSScriptable *
                getClassPrototype(JSContext *cx);

        /* instanceof methods */
        jsBool_t
                isInstanceOf(const jsString_t className);

        /* scriptable methods */
        jsString_t
                getClassName(JSContext *cx);
        jsBool_t
                has(JSContext *cx, jsString_t name, JSScriptable *start);
        jsBool_t
                get(JSContext *cx, jsString_t name, JSScriptable *start,
                        jsVal_t *value);

        jsBool_t
                hasInstance(JSContext *cx, JSScriptable *instance);

        /* function methods */
        jsVal_t call(JSContext *cx, JSScriptable *scope, JSScriptable *thisObj,
                        int numArgs, jsVal_t *args);
        JSScriptable
                *construct(JSContext *cx, JSScriptable *scope, int numArgs,
                        jsVal_t *args);

        /* gc methods */
        void    mark(JSContext *cx);
};

#endif /* _JS_NATIVE_FUNCTION_H_ */

