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AK+LibCompress: Break when seekback copying to a full CircularBuffer
Otherwise, we just end up infinitely looping while waiting for more space in the destination.
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sideshowbarker
2024-07-16 21:55:16 +09:00
Author: https://github.com/timschumi Commit: https://github.com/SerenityOS/serenity/commit/b88c58b94c Pull-request: https://github.com/SerenityOS/serenity/pull/18180 Reviewed-by: https://github.com/gmta Reviewed-by: https://github.com/trflynn89 ✅
@ -213,6 +213,9 @@ ErrorOr<size_t> CircularBuffer::copy_from_seekback(size_t distance, size_t lengt
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auto remaining_length = length;
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while (remaining_length > 0) {
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if (empty_space() == 0)
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break;
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auto next_span = next_read_span_with_seekback(distance);
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if (next_span.size() == 0)
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break;
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@ -208,7 +208,10 @@ ErrorOr<bool> DeflateDecompressor::CompressedBlock::try_read_more()
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m_decompressor.m_output_buffer.write({ &byte, sizeof(byte) });
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}
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} else {
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TRY(m_decompressor.m_output_buffer.copy_from_seekback(distance, length));
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auto copied_length = TRY(m_decompressor.m_output_buffer.copy_from_seekback(distance, length));
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// TODO: What should we do if the output buffer is full?
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VERIFY(copied_length == length);
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}
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return true;
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