Function gjs_byte_array_from_data_copy

gjs/byteArray.cpp:158–183

}

JSObject* gjs_byte_array_from_data_copy(JSContext* cx, size_t nbytes,
                                        void* data) {
    JS::RootedObject array_buffer(cx);
    // a null data pointer takes precedence over whatever `nbytes` says
    if (data) {
        array_buffer = JS::NewArrayBuffer(cx, nbytes);

        JS::AutoCheckCannotGC nogc{};
        bool unused;
        uint8_t* storage = JS::GetArrayBufferData(array_buffer, &unused, nogc);
        std::copy_n(static_cast<uint8_t*>(data), nbytes, storage);
    } else {
        array_buffer = JS::NewArrayBuffer(cx, 0);
    }
    if (!array_buffer)
        return nullptr;

    JS::RootedObject array(cx,
                           JS_NewUint8ArrayWithBuffer(cx, array_buffer, 0, -1));

    const GjsAtoms& atoms = GjsContextPrivate::atoms(cx);
    if (!JS_DefineFunctionById(cx, array, atoms.to_string(),
                               instance_to_string_func, 1, 0))
        return nullptr;
    return array;
}

JSObject* gjs_byte_array_from_byte_array(JSContext* cx, GByteArray* array) {
    return gjs_byte_array_from_data_copy(cx, array->len, array->data);