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| </pre><pre class="rust"><code><span class="doccomment">//! Implementation for `miniz_oxide` rust backend. |
| |
| </span><span class="kw">use </span>std::convert::TryInto; |
| <span class="kw">use </span>std::fmt; |
| |
| <span class="kw">use </span>miniz_oxide::deflate::core::CompressorOxide; |
| <span class="kw">use </span>miniz_oxide::inflate::stream::InflateState; |
| <span class="kw">pub use </span>miniz_oxide::<span class="kw-2">*</span>; |
| |
| <span class="kw">pub const </span>MZ_NO_FLUSH: isize = MZFlush::None <span class="kw">as </span>isize; |
| <span class="kw">pub const </span>MZ_PARTIAL_FLUSH: isize = MZFlush::Partial <span class="kw">as </span>isize; |
| <span class="kw">pub const </span>MZ_SYNC_FLUSH: isize = MZFlush::Sync <span class="kw">as </span>isize; |
| <span class="kw">pub const </span>MZ_FULL_FLUSH: isize = MZFlush::Full <span class="kw">as </span>isize; |
| <span class="kw">pub const </span>MZ_FINISH: isize = MZFlush::Finish <span class="kw">as </span>isize; |
| |
| <span class="kw">use super</span>::<span class="kw-2">*</span>; |
| <span class="kw">use </span><span class="kw">crate</span>::mem; |
| |
| <span class="comment">// miniz_oxide doesn't provide any error messages (yet?) |
| </span><span class="attribute">#[derive(Default)] |
| </span><span class="kw">pub struct </span>ErrorMessage; |
| |
| <span class="kw">impl </span>ErrorMessage { |
| <span class="kw">pub fn </span>get(<span class="kw-2">&</span><span class="self">self</span>) -> <span class="prelude-ty">Option</span><<span class="kw-2">&</span>str> { |
| <span class="prelude-val">None |
| </span>} |
| } |
| |
| <span class="kw">fn </span>format_from_bool(zlib_header: bool) -> DataFormat { |
| <span class="kw">if </span>zlib_header { |
| DataFormat::Zlib |
| } <span class="kw">else </span>{ |
| DataFormat::Raw |
| } |
| } |
| |
| <span class="kw">pub struct </span>Inflate { |
| inner: Box<InflateState>, |
| total_in: u64, |
| total_out: u64, |
| } |
| |
| <span class="kw">impl </span>fmt::Debug <span class="kw">for </span>Inflate { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter) -> <span class="prelude-ty">Result</span><(), fmt::Error> { |
| <span class="macro">write!</span>( |
| f, |
| <span class="string">"miniz_oxide inflate internal state. total_in: {}, total_out: {}"</span>, |
| <span class="self">self</span>.total_in, <span class="self">self</span>.total_out, |
| ) |
| } |
| } |
| |
| <span class="kw">impl </span>InflateBackend <span class="kw">for </span>Inflate { |
| <span class="kw">fn </span>make(zlib_header: bool, _window_bits: u8) -> <span class="self">Self </span>{ |
| <span class="kw">let </span>format = format_from_bool(zlib_header); |
| |
| Inflate { |
| inner: InflateState::new_boxed(format), |
| total_in: <span class="number">0</span>, |
| total_out: <span class="number">0</span>, |
| } |
| } |
| |
| <span class="kw">fn </span>decompress( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| input: <span class="kw-2">&</span>[u8], |
| output: <span class="kw-2">&mut </span>[u8], |
| flush: FlushDecompress, |
| ) -> <span class="prelude-ty">Result</span><Status, DecompressError> { |
| <span class="kw">let </span>flush = MZFlush::new(flush <span class="kw">as </span>i32).unwrap(); |
| |
| <span class="kw">let </span>res = inflate::stream::inflate(<span class="kw-2">&mut </span><span class="self">self</span>.inner, input, output, flush); |
| <span class="self">self</span>.total_in += res.bytes_consumed <span class="kw">as </span>u64; |
| <span class="self">self</span>.total_out += res.bytes_written <span class="kw">as </span>u64; |
| |
| <span class="kw">match </span>res.status { |
| <span class="prelude-val">Ok</span>(status) => <span class="kw">match </span>status { |
| MZStatus::Ok => <span class="prelude-val">Ok</span>(Status::Ok), |
| MZStatus::StreamEnd => <span class="prelude-val">Ok</span>(Status::StreamEnd), |
| MZStatus::NeedDict => { |
| mem::decompress_need_dict(<span class="self">self</span>.inner.decompressor().adler32().unwrap_or(<span class="number">0</span>)) |
| } |
| }, |
| <span class="prelude-val">Err</span>(status) => <span class="kw">match </span>status { |
| MZError::Buf => <span class="prelude-val">Ok</span>(Status::BufError), |
| <span class="kw">_ </span>=> mem::decompress_failed(ErrorMessage), |
| }, |
| } |
| } |
| |
| <span class="kw">fn </span>reset(<span class="kw-2">&mut </span><span class="self">self</span>, zlib_header: bool) { |
| <span class="self">self</span>.inner.reset(format_from_bool(zlib_header)); |
| <span class="self">self</span>.total_in = <span class="number">0</span>; |
| <span class="self">self</span>.total_out = <span class="number">0</span>; |
| } |
| } |
| |
| <span class="kw">impl </span>Backend <span class="kw">for </span>Inflate { |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>total_in(<span class="kw-2">&</span><span class="self">self</span>) -> u64 { |
| <span class="self">self</span>.total_in |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>total_out(<span class="kw-2">&</span><span class="self">self</span>) -> u64 { |
| <span class="self">self</span>.total_out |
| } |
| } |
| |
| <span class="kw">pub struct </span>Deflate { |
| inner: Box<CompressorOxide>, |
| total_in: u64, |
| total_out: u64, |
| } |
| |
| <span class="kw">impl </span>fmt::Debug <span class="kw">for </span>Deflate { |
| <span class="kw">fn </span>fmt(<span class="kw-2">&</span><span class="self">self</span>, f: <span class="kw-2">&mut </span>fmt::Formatter) -> <span class="prelude-ty">Result</span><(), fmt::Error> { |
| <span class="macro">write!</span>( |
| f, |
| <span class="string">"miniz_oxide deflate internal state. total_in: {}, total_out: {}"</span>, |
| <span class="self">self</span>.total_in, <span class="self">self</span>.total_out, |
| ) |
| } |
| } |
| |
| <span class="kw">impl </span>DeflateBackend <span class="kw">for </span>Deflate { |
| <span class="kw">fn </span>make(level: Compression, zlib_header: bool, _window_bits: u8) -> <span class="self">Self </span>{ |
| <span class="comment">// Check in case the integer value changes at some point. |
| </span><span class="macro">debug_assert!</span>(level.level() <= <span class="number">10</span>); |
| |
| <span class="kw">let </span><span class="kw-2">mut </span>inner: Box<CompressorOxide> = Box::default(); |
| <span class="kw">let </span>format = format_from_bool(zlib_header); |
| inner.set_format_and_level(format, level.level().try_into().unwrap_or(<span class="number">1</span>)); |
| |
| Deflate { |
| inner, |
| total_in: <span class="number">0</span>, |
| total_out: <span class="number">0</span>, |
| } |
| } |
| |
| <span class="kw">fn </span>compress( |
| <span class="kw-2">&mut </span><span class="self">self</span>, |
| input: <span class="kw-2">&</span>[u8], |
| output: <span class="kw-2">&mut </span>[u8], |
| flush: FlushCompress, |
| ) -> <span class="prelude-ty">Result</span><Status, CompressError> { |
| <span class="kw">let </span>flush = MZFlush::new(flush <span class="kw">as </span>i32).unwrap(); |
| <span class="kw">let </span>res = deflate::stream::deflate(<span class="kw-2">&mut </span><span class="self">self</span>.inner, input, output, flush); |
| <span class="self">self</span>.total_in += res.bytes_consumed <span class="kw">as </span>u64; |
| <span class="self">self</span>.total_out += res.bytes_written <span class="kw">as </span>u64; |
| |
| <span class="kw">match </span>res.status { |
| <span class="prelude-val">Ok</span>(status) => <span class="kw">match </span>status { |
| MZStatus::Ok => <span class="prelude-val">Ok</span>(Status::Ok), |
| MZStatus::StreamEnd => <span class="prelude-val">Ok</span>(Status::StreamEnd), |
| MZStatus::NeedDict => mem::compress_failed(ErrorMessage), |
| }, |
| <span class="prelude-val">Err</span>(status) => <span class="kw">match </span>status { |
| MZError::Buf => <span class="prelude-val">Ok</span>(Status::BufError), |
| <span class="kw">_ </span>=> mem::compress_failed(ErrorMessage), |
| }, |
| } |
| } |
| |
| <span class="kw">fn </span>reset(<span class="kw-2">&mut </span><span class="self">self</span>) { |
| <span class="self">self</span>.total_in = <span class="number">0</span>; |
| <span class="self">self</span>.total_out = <span class="number">0</span>; |
| <span class="self">self</span>.inner.reset(); |
| } |
| } |
| |
| <span class="kw">impl </span>Backend <span class="kw">for </span>Deflate { |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>total_in(<span class="kw-2">&</span><span class="self">self</span>) -> u64 { |
| <span class="self">self</span>.total_in |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">fn </span>total_out(<span class="kw-2">&</span><span class="self">self</span>) -> u64 { |
| <span class="self">self</span>.total_out |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="flate2" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
