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AK: Move parts for searching CircularBuffer into a new class

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We will be adding extra logic to the CircularBuffer to optimize
searching, but this would negatively impact the performance of
CircularBuffer users that don't need that functionality.
This commit is contained in:
Tim Schumacher 2023-06-01 20:48:35 +02:00 • committed by Linus Groh
parent 40c0dd67dd
commit 9e82ad758e
6 changed files with 50 additions and 16 deletions
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4
Userland/Libraries/LibCompress/Lzma.cpp
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@ -1214,7 +1214,7 @@ void LzmaDecompressor::close()
ErrorOr<NonnullOwnPtr<LzmaCompressor>> LzmaCompressor::create_container(MaybeOwned<Stream> stream, LzmaCompressorOptions const& options)
{
auto dictionary = TRY(try_make<CircularBuffer>(TRY(CircularBuffer::create_empty(options.dictionary_size + largest_real_match_length))));
auto dictionary = TRY(try_make<SearchableCircularBuffer>(TRY(SearchableCircularBuffer::create_empty(options.dictionary_size + largest_real_match_length))));
// "The LZMA Decoder uses (1 << (lc + lp)) tables with CProb values, where each table contains 0x300 CProb values."
auto literal_probabilities = TRY(FixedArray<Probability>::create(literal_probability_table_size * (1 << (options.literal_context_bits + options.literal_position_bits))));
@ -1227,7 +1227,7 @@ ErrorOr<NonnullOwnPtr<LzmaCompressor>> LzmaCompressor::create_container(MaybeOwn
return compressor;
}
LzmaCompressor::LzmaCompressor(MaybeOwned<AK::Stream> stream, Compress::LzmaCompressorOptions options, MaybeOwned<CircularBuffer> dictionary, FixedArray<Compress::LzmaState::Probability> literal_probabilities)
LzmaCompressor::LzmaCompressor(MaybeOwned<AK::Stream> stream, Compress::LzmaCompressorOptions options, MaybeOwned<SearchableCircularBuffer> dictionary, FixedArray<Compress::LzmaState::Probability> literal_probabilities)
: LzmaState(move(literal_probabilities))
, m_stream(move(stream))
, m_options(move(options))