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** Alternatively, this file may be used under the terms of the GNU
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** Foundation and appearing in the file LICENSE.GPL included in the
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#include <qv4argumentsobject.h>

namespace QQmlJS {
namespace VM {


static Value throwTypeError(SimpleCallContext *ctx)
{
    ctx->throwTypeError();
    return Value::undefinedValue();
}

DEFINE_MANAGED_VTABLE(ArgumentsObject);

ArgumentsObject::ArgumentsObject(CallContext *context, int formalParameterCount, int actualParameterCount)
    : Object(context->engine), context(context)
{
    vtbl = &static_vtbl;
    type = Type_ArgumentsObject;

    defineDefaultProperty(context->engine->id_length, Value::fromInt32(actualParameterCount));
    if (context->strictMode) {
        for (uint i = 0; i < context->argumentCount; ++i)
            Object::put(context, QString::number(i), context->arguments[i]);
        FunctionObject *thrower = context->engine->newBuiltinFunction(context, 0, throwTypeError);
        Property pd = Property::fromAccessor(thrower, thrower);
        __defineOwnProperty__(context, QStringLiteral("callee"), pd, Attr_Accessor|Attr_NotConfigurable|Attr_NotEnumerable);
        __defineOwnProperty__(context, QStringLiteral("caller"), pd, Attr_Accessor|Attr_NotConfigurable|Attr_NotEnumerable);
    } else {
        uint numAccessors = qMin(formalParameterCount, actualParameterCount);
        context->engine->requireArgumentsAccessors(numAccessors);
        for (uint i = 0; i < (uint)numAccessors; ++i) {
            mappedArguments.append(context->argument(i));
            __defineOwnProperty__(context, i, context->engine->argumentsAccessors.at(i), Attr_Accessor);
        }
        for (uint i = numAccessors; i < qMin((uint)actualParameterCount, context->argumentCount); ++i) {
            Property pd = Property::fromValue(context->argument(i));
            __defineOwnProperty__(context, i, pd, Attr_Data);
        }
        defineDefaultProperty(context, QStringLiteral("callee"), Value::fromObject(context->function));
        isNonStrictArgumentsObject = true;
    }
}

void ArgumentsObject::destroy(Managed *that)
{
    static_cast<ArgumentsObject *>(that)->~ArgumentsObject();
}

bool ArgumentsObject::defineOwnProperty(ExecutionContext *ctx, uint index, const Property &desc, PropertyAttributes attrs)
{
    uint pidx = propertyIndexFromArrayIndex(index);
    Property *pd = arrayData + pidx;
    Property map;
    PropertyAttributes mapAttrs;
    bool isMapped = false;
    if (pd && index < (uint)mappedArguments.size())
        isMapped = arrayAttributes && arrayAttributes[pidx].isAccessor() && pd->getter() == context->engine->argumentsAccessors.at(index).getter();

    if (isMapped) {
        map = *pd;
        mapAttrs = arrayAttributes[pidx];
        arrayAttributes[pidx] = Attr_Data;
        pd->value = mappedArguments.at(index);
    }

    isNonStrictArgumentsObject = false;
    bool strict = ctx->strictMode;
    ctx->strictMode = false;
    bool result = Object::__defineOwnProperty__(ctx, index, desc, attrs);
    ctx->strictMode = strict;
    isNonStrictArgumentsObject = true;

    if (isMapped && attrs.isData()) {
        if (!attrs.isGeneric()) {
            Value arg = desc.value;
            map.setter()->call(ctx, Value::fromObject(this), &arg, 1);
        }
        if (attrs.isWritable()) {
            *pd = map;
            arrayAttributes[pidx] = mapAttrs;
        }
    }

    if (ctx->strictMode && !result)
        ctx->throwTypeError();
    return result;
}

DEFINE_MANAGED_VTABLE(ArgumentsGetterFunction);

Value ArgumentsGetterFunction::call(Managed *getter, ExecutionContext *ctx, const Value &thisObject, Value *, int)
{
    ArgumentsGetterFunction *g = static_cast<ArgumentsGetterFunction *>(getter);
    Object *that = thisObject.asObject();
    if (!that)
        ctx->throwTypeError();
    ArgumentsObject *o = that->asArgumentsObject();
    if (!o)
        ctx->throwTypeError();

    assert(g->index < o->context->argumentCount);
    return o->context->argument(g->index);
}

DEFINE_MANAGED_VTABLE(ArgumentsSetterFunction);

Value ArgumentsSetterFunction::call(Managed *setter, ExecutionContext *ctx, const Value &thisObject, Value *args, int argc)
{
    ArgumentsSetterFunction *s = static_cast<ArgumentsSetterFunction *>(setter);
    Object *that = thisObject.asObject();
    if (!that)
        ctx->throwTypeError();
    ArgumentsObject *o = that->asArgumentsObject();
    if (!o)
        ctx->throwTypeError();

    assert(s->index < o->context->argumentCount);
    o->context->arguments[s->index] = argc ? args[0] : Value::undefinedValue();
    return Value::undefinedValue();
}

void ArgumentsObject::markObjects(Managed *that)
{
    ArgumentsObject *o = static_cast<ArgumentsObject *>(that);
    o->context->mark();
    for (int i = 0; i < o->mappedArguments.size(); ++i) {
        Managed *m = o->mappedArguments.at(i).asManaged();
        if (m)
            m->mark();
    }
    Object::markObjects(that);
}

}
}