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| </pre><pre class="rust"><code><span class="kw">use </span>std::io; |
| |
| <span class="kw">use </span>serde::{Deserialize, Serialize}; |
| |
| <span class="kw">use </span><span class="kw">super</span>::Compressor; |
| |
| <span class="kw">pub trait </span>StoreCompressor { |
| <span class="kw">fn </span>compress(<span class="kw-2">&</span><span class="self">self</span>, uncompressed: <span class="kw-2">&</span>[u8], compressed: <span class="kw-2">&mut </span>Vec<u8>) -> io::Result<()>; |
| <span class="kw">fn </span>decompress(<span class="kw-2">&</span><span class="self">self</span>, compressed: <span class="kw-2">&</span>[u8], decompressed: <span class="kw-2">&mut </span>Vec<u8>) -> io::Result<()>; |
| <span class="kw">fn </span>get_compressor_id() -> u8; |
| } |
| |
| <span class="doccomment">/// Decompressor is deserialized from the doc store footer, when opening an index. |
| </span><span class="attribute">#[derive(Clone, Debug, Copy, PartialEq, Eq, Serialize, Deserialize)] |
| </span><span class="kw">pub enum </span>Decompressor { |
| <span class="doccomment">/// No compression |
| </span><span class="prelude-val">None</span>, |
| <span class="doccomment">/// Use the lz4 decompressor (block format) |
| </span>Lz4, |
| <span class="doccomment">/// Use the brotli decompressor |
| </span>Brotli, |
| <span class="doccomment">/// Use the snap decompressor |
| </span>Snappy, |
| <span class="doccomment">/// Use the zstd decompressor |
| </span>Zstd, |
| } |
| |
| <span class="kw">impl </span>From<Compressor> <span class="kw">for </span>Decompressor { |
| <span class="kw">fn </span>from(compressor: Compressor) -> <span class="self">Self </span>{ |
| <span class="kw">match </span>compressor { |
| Compressor::None => Decompressor::None, |
| Compressor::Lz4 => Decompressor::Lz4, |
| Compressor::Brotli => Decompressor::Brotli, |
| Compressor::Snappy => Decompressor::Snappy, |
| Compressor::Zstd(<span class="kw">_</span>) => Decompressor::Zstd, |
| } |
| } |
| } |
| |
| <span class="kw">impl </span>Decompressor { |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>from_id(id: u8) -> Decompressor { |
| <span class="kw">match </span>id { |
| <span class="number">0 </span>=> Decompressor::None, |
| <span class="number">1 </span>=> Decompressor::Lz4, |
| <span class="number">2 </span>=> Decompressor::Brotli, |
| <span class="number">3 </span>=> Decompressor::Snappy, |
| <span class="number">4 </span>=> Decompressor::Zstd, |
| <span class="kw">_ </span>=> <span class="macro">panic!</span>(<span class="string">"unknown compressor id {:?}"</span>, id), |
| } |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>get_id(<span class="kw-2">&</span><span class="self">self</span>) -> u8 { |
| <span class="kw">match </span><span class="self">self </span>{ |
| <span class="self">Self</span>::None => <span class="number">0</span>, |
| <span class="self">Self</span>::Lz4 => <span class="number">1</span>, |
| <span class="self">Self</span>::Brotli => <span class="number">2</span>, |
| <span class="self">Self</span>::Snappy => <span class="number">3</span>, |
| <span class="self">Self</span>::Zstd => <span class="number">4</span>, |
| } |
| } |
| |
| <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>decompress(<span class="kw-2">&</span><span class="self">self</span>, compressed_block: <span class="kw-2">&</span>[u8]) -> io::Result<Vec<u8>> { |
| <span class="kw">let </span><span class="kw-2">mut </span>decompressed_block = <span class="macro">vec!</span>[]; |
| <span class="self">self</span>.decompress_into(compressed_block, <span class="kw-2">&mut </span>decompressed_block)<span class="question-mark">?</span>; |
| <span class="prelude-val">Ok</span>(decompressed_block) |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>decompress_into( |
| <span class="kw-2">&</span><span class="self">self</span>, |
| compressed: <span class="kw-2">&</span>[u8], |
| decompressed: <span class="kw-2">&mut </span>Vec<u8>, |
| ) -> io::Result<()> { |
| <span class="kw">match </span><span class="self">self </span>{ |
| <span class="self">Self</span>::None => { |
| decompressed.clear(); |
| decompressed.extend_from_slice(compressed); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| <span class="self">Self</span>::Lz4 => { |
| <span class="attribute">#[cfg(feature = <span class="string">"lz4-compression"</span>)] |
| </span>{ |
| <span class="kw">super</span>::compression_lz4_block::decompress(compressed, decompressed) |
| } |
| <span class="attribute">#[cfg(not(feature = <span class="string">"lz4-compression"</span>))] |
| </span>{ |
| <span class="macro">panic!</span>(<span class="string">"lz4-compression feature flag not activated"</span>); |
| } |
| } |
| <span class="self">Self</span>::Brotli => { |
| <span class="attribute">#[cfg(feature = <span class="string">"brotli-compression"</span>)] |
| </span>{ |
| <span class="kw">super</span>::compression_brotli::decompress(compressed, decompressed) |
| } |
| <span class="attribute">#[cfg(not(feature = <span class="string">"brotli-compression"</span>))] |
| </span>{ |
| <span class="macro">panic!</span>(<span class="string">"brotli-compression feature flag not activated"</span>); |
| } |
| } |
| <span class="self">Self</span>::Snappy => { |
| <span class="attribute">#[cfg(feature = <span class="string">"snappy-compression"</span>)] |
| </span>{ |
| <span class="kw">super</span>::compression_snap::decompress(compressed, decompressed) |
| } |
| <span class="attribute">#[cfg(not(feature = <span class="string">"snappy-compression"</span>))] |
| </span>{ |
| <span class="macro">panic!</span>(<span class="string">"snappy-compression feature flag not activated"</span>); |
| } |
| } |
| <span class="self">Self</span>::Zstd => { |
| <span class="attribute">#[cfg(feature = <span class="string">"zstd-compression"</span>)] |
| </span>{ |
| <span class="kw">super</span>::compression_zstd_block::decompress(compressed, decompressed) |
| } |
| <span class="attribute">#[cfg(not(feature = <span class="string">"zstd-compression"</span>))] |
| </span>{ |
| <span class="macro">panic!</span>(<span class="string">"zstd-compression feature flag not activated"</span>); |
| } |
| } |
| } |
| } |
| } |
| |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">mod </span>tests { |
| <span class="kw">use super</span>::<span class="kw-2">*</span>; |
| <span class="kw">use </span><span class="kw">crate</span>::store::Compressor; |
| |
| <span class="attribute">#[test] |
| </span><span class="kw">fn </span>compressor_decompressor_id_test() { |
| <span class="macro">assert_eq!</span>(Decompressor::from(Compressor::None), Decompressor::None); |
| <span class="macro">assert_eq!</span>(Decompressor::from(Compressor::Lz4), Decompressor::Lz4); |
| <span class="macro">assert_eq!</span>(Decompressor::from(Compressor::Brotli), Decompressor::Brotli); |
| <span class="macro">assert_eq!</span>(Decompressor::from(Compressor::Snappy), Decompressor::Snappy); |
| <span class="macro">assert_eq!</span>( |
| Decompressor::from(Compressor::Zstd(Default::default())), |
| Decompressor::Zstd |
| ); |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="tantivy" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |