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LibWeb: Add ReadableBSControllerProcessPullIntoDescriptorsUsingQueue

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Shannon Booth 2023-11-19 12:21:47 +13:00 • committed by Andreas Kling
parent 737dc6ce4e
commit 1443715775
2 changed files with 30 additions and 0 deletions
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29
Userland/Libraries/LibWeb/Streams/AbstractOperations.cpp
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@ -1848,6 +1848,35 @@ void readable_byte_stream_controller_commit_pull_into_descriptor(ReadableStream&
}
}
// https://streams.spec.whatwg.org/#readable-byte-stream-controller-process-pull-into-descriptors-using-queue
void readable_byte_stream_controller_process_pull_into_descriptors_using_queue(ReadableByteStreamController& controller)
{
// 1. Assert: controller.[[closeRequested]] is false.
VERIFY(!controller.close_requested());
// 2. While controller.[[pendingPullIntos]] is not empty,
while (!controller.pending_pull_intos().is_empty()) {
// 1. If controller.[[queueTotalSize]] is 0, return.
if (controller.queue_total_size() == 0)
return;
// 2. Let pullIntoDescriptor be controller.[[pendingPullIntos]][0].
auto& pull_into_descriptor = controller.pending_pull_intos().first();
// 3. If ! ReadableByteStreamControllerFillPullIntoDescriptorFromQueue(controller, pullIntoDescriptor) is true,
if (readable_byte_stream_controller_fill_pull_into_descriptor_from_queue(controller, pull_into_descriptor)) {
// NOTE: We store the returned pull into descriptor here as the 'shift pending pull into' will remove
// the first entry into the list which we have a reference to above.
// 1. Perform ! ReadableByteStreamControllerShiftPendingPullInto(controller).
auto descriptor = readable_byte_stream_controller_shift_pending_pull_into(controller);
// 2. Perform ! ReadableByteStreamControllerCommitPullIntoDescriptor(controller.[[stream]], pullIntoDescriptor).
readable_byte_stream_controller_commit_pull_into_descriptor(*controller.stream(), descriptor);
}
}
}
// https://streams.spec.whatwg.org/#abstract-opdef-readablebytestreamcontrollerprocessreadrequestsusingqueue
WebIDL::ExceptionOr<void> readable_byte_stream_controller_process_read_requests_using_queue(ReadableByteStreamController& controller)
{