qtdeclarative/qmljs_value.cpp

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#include <qmljs_engine.h>
#include <qv4object.h>
#include <qv4ecmaobjects_p.h>

namespace QQmlJS {
namespace VM {


int Value::toUInt16(ExecutionContext *ctx)
{
    return __qmljs_to_uint16(*this, ctx);
}

Bool Value::toBoolean(ExecutionContext *ctx) const
{
    return __qmljs_to_boolean(*this, ctx);
}

double Value::toInteger(ExecutionContext *ctx) const
{
    return __qmljs_to_integer(*this, ctx);
}

double Value::toNumber(ExecutionContext *ctx) const
{
    return __qmljs_to_number(*this, ctx);
}

String *Value::toString(ExecutionContext *ctx) const
{
    Value v = __qmljs_to_string(*this, ctx);
    assert(v.isString());
    return v.stringValue();
}

Value Value::toObject(ExecutionContext *ctx) const
{
    return __qmljs_to_object(*this, ctx);
}


bool Value::sameValue(Value other) const {
    if (val == other.val)
        return true;
    if (isString() && other.isString())
        return stringValue()->isEqualTo(other.stringValue());
    if (isInteger() && int_32 == 0 && other.dbl == 0)
        return true;
    if (dbl == 0 && other.isInteger() && other.int_32 == 0)
        return true;
    return false;
}

Value Value::fromString(ExecutionContext *ctx, const QString &s)
{
    return fromString(ctx->engine->newString(s));
}

int Value::toInt32(double number)
{
    const double D32 = 4294967296.0;
    const double D31 = D32 / 2.0;

    if ((number >= -D31 && number < D31))
        return static_cast<int>(number);


    if (!std::isfinite(number))
        return 0;

    double d = ::floor(::fabs(number));
    if (std::signbit(number))
        d = -d;

    number = ::fmod(d , D32);

    if (number < -D31)
        number += D32;
    else if (number >= D31)
        number -= D32;

    return int(number);
}

unsigned int Value::toUInt32(double number)
{
    const double D32 = 4294967296.0;
    if ((number >= 0 && number < D32))
        return static_cast<uint>(number);

    if (!std::isfinite(number))
        return +0;

    double d = ::floor(::fabs(number));
    if (std::signbit(number))
        d = -d;

    number = ::fmod(d , D32);

    if (number < 0)
        number += D32;

    return unsigned(number);
}

double Value::toInteger(double number)
{
    if (std::isnan(number))
        return +0;
    else if (! number || std::isinf(number))
        return number;
    const double v = floor(fabs(number));
    return std::signbit(number) ? -v : v;
}

Object *Value::asObject() const
{
    return isObject() ? objectValue() : 0;
}

FunctionObject *Value::asFunctionObject() const
{
    return isObject() ? objectValue()->asFunctionObject() : 0;
}

BooleanObject *Value::asBooleanObject() const
{
    return isObject() ? objectValue()->asBooleanObject() : 0;
}

NumberObject *Value::asNumberObject() const
{
    return isObject() ? objectValue()->asNumberObject() : 0;
}

StringObject *Value::asStringObject() const
{
    return isObject() ? objectValue()->asStringObject() : 0;
}

DateObject *Value::asDateObject() const
{
    return isObject() ? objectValue()->asDateObject() : 0;
}

RegExpObject *Value::asRegExpObject() const
{
    return isObject() ? objectValue()->asRegExpObject() : 0;
}

ArrayObject *Value::asArrayObject() const
{
    return isObject() ? objectValue()->asArrayObject() : 0;
}

ErrorObject *Value::asErrorObject() const
{
    return isObject() ? objectValue()->asErrorObject() : 0;
}

Value Value::property(ExecutionContext *ctx, String *name) const
{
    return isObject() ? objectValue()->__get__(ctx, name) : undefinedValue();
}



} // namespace VM
} // namespace QQmlJS