C++ (Cpp) Handle::CanMakeExternal示例

StringType v8StringToWebCoreString(v8::Handle<v8::String> v8String, ExternalMode external)
{
    WebCoreStringResource* stringResource = WebCoreStringResource::toStringResource(v8String);
    if (stringResource)
        return StringTraits<StringType>::fromStringResource(stringResource);

    int length = v8String->Length();
    if (!length)
        return String("");

    StringType result(StringTraits<StringType>::fromV8String(v8String, length));

    if (external == Externalize && v8String->CanMakeExternal()) {
        stringResource = new WebCoreStringResource(result);
        if (!v8String->MakeExternal(stringResource)) {
            // In case of a failure delete the external resource as it was not used.
            delete stringResource;
        }
    }
    return result;
}

示例#2

显示文件

文件： V8Binding.cpp 项目： azrul2202/WebKit-Smartphone

StringType v8StringToWebCoreString(v8::Handle<v8::String> v8String, ExternalMode external)
{
    WebCoreStringResource* stringResource = WebCoreStringResource::toStringResource(v8String);
    if (stringResource)
        return StringTraits<StringType>::fromStringResource(stringResource);

    int length = v8String->Length();
    if (!length) {
        // Avoid trying to morph empty strings, as they do not have enough room to contain the external reference.
        return StringImpl::empty();
    }

    StringType result(StringTraits<StringType>::fromV8String(v8String, length));

    if (external == Externalize && v8String->CanMakeExternal()) {
        stringResource = new WebCoreStringResource(result);
        if (!v8String->MakeExternal(stringResource)) {
            // In case of a failure delete the external resource as it was not used.
            delete stringResource;
        }
    }
    return result;
}

示例#3

显示文件

文件： V8StringResource.cpp 项目： kjthegod/WebKit

StringType v8StringToWebCoreString(v8::Handle<v8::String> v8String, ExternalMode external)
{
    {
        // This portion of this function is very hot in certain Dromeao benchmarks.
        v8::String::Encoding encoding;
        v8::String::ExternalStringResourceBase* resource = v8String->GetExternalStringResourceBase(&encoding);
        if (LIKELY(!!resource)) {
            WebCoreStringResourceBase* base;
            if (encoding == v8::String::ONE_BYTE_ENCODING)
                base = static_cast<WebCoreStringResource8*>(resource);
            else
                base = static_cast<WebCoreStringResource16*>(resource);
            return StringTraits<StringType>::fromStringResource(base);
        }
    }

    int length = v8String->Length();
    if (UNLIKELY(!length))
        return StringType("");

    bool oneByte = v8String->ContainsOnlyOneByte();
    StringType result(oneByte ? StringTraits<StringType>::template fromV8String<V8StringOneByteTrait>(v8String, length) : StringTraits<StringType>::template fromV8String<V8StringTwoBytesTrait>(v8String, length));

    if (external != Externalize || !v8String->CanMakeExternal())
        return result;

    if (result.is8Bit()) {
        WebCoreStringResource8* stringResource = new WebCoreStringResource8(result);
        if (UNLIKELY(!v8String->MakeExternal(stringResource)))
            delete stringResource;
    } else {
        WebCoreStringResource16* stringResource = new WebCoreStringResource16(result);
        if (UNLIKELY(!v8String->MakeExternal(stringResource)))
            delete stringResource;
    }
    return result;
}