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| </pre><pre class="rust"><code><span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>compress_sorted<<span class="lifetime">'a</span>>(input: <span class="kw-2">&</span>[u32], output: <span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>[u8], <span class="kw-2">mut </span>offset: u32) -> <span class="kw-2">&</span><span class="lifetime">'a </span>[u8] { |
| <span class="kw">let </span><span class="kw-2">mut </span>byte_written = <span class="number">0</span>; |
| <span class="kw">for </span><span class="kw-2">&</span>v <span class="kw">in </span>input { |
| <span class="kw">let </span><span class="kw-2">mut </span>to_encode: u32 = v - offset; |
| offset = v; |
| <span class="kw">loop </span>{ |
| <span class="kw">let </span>next_byte: u8 = (to_encode % <span class="number">128u32</span>) <span class="kw">as </span>u8; |
| to_encode /= <span class="number">128u32</span>; |
| <span class="kw">if </span>to_encode == <span class="number">0u32 </span>{ |
| output[byte_written] = next_byte | <span class="number">128u8</span>; |
| byte_written += <span class="number">1</span>; |
| <span class="kw">break</span>; |
| } <span class="kw">else </span>{ |
| output[byte_written] = next_byte; |
| byte_written += <span class="number">1</span>; |
| } |
| } |
| } |
| <span class="kw-2">&</span>output[..byte_written] |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>compress_unsorted<<span class="lifetime">'a</span>>(input: <span class="kw-2">&</span>[u32], output: <span class="kw-2">&</span><span class="lifetime">'a </span><span class="kw-2">mut </span>[u8]) -> <span class="kw-2">&</span><span class="lifetime">'a </span>[u8] { |
| <span class="kw">let </span><span class="kw-2">mut </span>byte_written = <span class="number">0</span>; |
| <span class="kw">for </span><span class="kw-2">&</span>v <span class="kw">in </span>input { |
| <span class="kw">let </span><span class="kw-2">mut </span>to_encode: u32 = v; |
| <span class="kw">loop </span>{ |
| <span class="kw">let </span>next_byte: u8 = (to_encode % <span class="number">128u32</span>) <span class="kw">as </span>u8; |
| to_encode /= <span class="number">128u32</span>; |
| <span class="kw">if </span>to_encode == <span class="number">0u32 </span>{ |
| output[byte_written] = next_byte | <span class="number">128u8</span>; |
| byte_written += <span class="number">1</span>; |
| <span class="kw">break</span>; |
| } <span class="kw">else </span>{ |
| output[byte_written] = next_byte; |
| byte_written += <span class="number">1</span>; |
| } |
| } |
| } |
| <span class="kw-2">&</span>output[..byte_written] |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub fn </span>uncompress_sorted(compressed_data: <span class="kw-2">&</span>[u8], output: <span class="kw-2">&mut </span>[u32], offset: u32) -> usize { |
| <span class="kw">let </span><span class="kw-2">mut </span>read_byte = <span class="number">0</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>result = offset; |
| <span class="kw">for </span>output_mut <span class="kw">in </span>output.iter_mut() { |
| <span class="kw">let </span><span class="kw-2">mut </span>shift = <span class="number">0u32</span>; |
| <span class="kw">loop </span>{ |
| <span class="kw">let </span>cur_byte = compressed_data[read_byte]; |
| read_byte += <span class="number">1</span>; |
| result += u32::from(cur_byte % <span class="number">128u8</span>) << shift; |
| <span class="kw">if </span>cur_byte & <span class="number">128u8 </span>!= <span class="number">0u8 </span>{ |
| <span class="kw">break</span>; |
| } |
| shift += <span class="number">7</span>; |
| } |
| <span class="kw-2">*</span>output_mut = result; |
| } |
| read_byte |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>uncompress_unsorted(compressed_data: <span class="kw-2">&</span>[u8], output_arr: <span class="kw-2">&mut </span>[u32]) -> usize { |
| <span class="kw">let </span><span class="kw-2">mut </span>num_read_bytes = <span class="number">0</span>; |
| <span class="kw">for </span>output_mut <span class="kw">in </span>output_arr.iter_mut() { |
| <span class="kw">let </span><span class="kw-2">mut </span>result = <span class="number">0u32</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>shift = <span class="number">0u32</span>; |
| <span class="kw">loop </span>{ |
| <span class="kw">let </span>cur_byte = compressed_data[num_read_bytes]; |
| num_read_bytes += <span class="number">1</span>; |
| result += u32::from(cur_byte % <span class="number">128u8</span>) << shift; |
| <span class="kw">if </span>cur_byte & <span class="number">128u8 </span>!= <span class="number">0u8 </span>{ |
| <span class="kw">break</span>; |
| } |
| shift += <span class="number">7</span>; |
| } |
| <span class="kw-2">*</span>output_mut = result; |
| } |
| num_read_bytes |
| } |
| |
| <span class="attribute">#[inline] |
| </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>uncompress_unsorted_until_end( |
| compressed_data: <span class="kw-2">&</span>[u8], |
| output_arr: <span class="kw-2">&mut </span>[u32], |
| ) -> usize { |
| <span class="kw">let </span><span class="kw-2">mut </span>num_read_bytes = <span class="number">0</span>; |
| <span class="kw">for </span>(num_ints_written, output_mut) <span class="kw">in </span>output_arr.iter_mut().enumerate() { |
| <span class="kw">if </span>compressed_data.len() == num_read_bytes { |
| <span class="kw">return </span>num_ints_written; |
| } |
| <span class="kw">let </span><span class="kw-2">mut </span>result = <span class="number">0u32</span>; |
| <span class="kw">let </span><span class="kw-2">mut </span>shift = <span class="number">0u32</span>; |
| <span class="kw">loop </span>{ |
| <span class="kw">let </span>cur_byte = compressed_data[num_read_bytes]; |
| num_read_bytes += <span class="number">1</span>; |
| result += u32::from(cur_byte % <span class="number">128u8</span>) << shift; |
| <span class="kw">if </span>cur_byte & <span class="number">128u8 </span>!= <span class="number">0u8 </span>{ |
| <span class="kw">break</span>; |
| } |
| shift += <span class="number">7</span>; |
| } |
| <span class="kw-2">*</span>output_mut = result; |
| } |
| output_arr.len() |
| } |
| </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> |