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<section id='main' class="content source"><pre class="line-numbers"><span id="1"> 1</span>
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</pre><pre class='rust '>
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<span class='kw'>pub</span> <span class='kw'>const</span> <span class='ident'>ECMA</span>: <span class='ident'>u64</span> <span class='op'>=</span> <span class='number'>0xc96c5795d7870f42</span>;
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<span class='kw'>pub</span> <span class='kw'>const</span> <span class='ident'>ISO</span>: <span class='ident'>u64</span> <span class='op'>=</span> <span class='number'>0xd800000000000000</span>;
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<span class='macro'>lazy_static</span><span class='macro'>!</span> {
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<span class='kw'>pub</span> <span class='kw'>static</span> <span class='kw-2'>ref</span> <span class='ident'>ECMA_TABLE</span>: [<span class='ident'>u64</span>; <span class='number'>256</span>] <span class='op'>=</span> <span class='ident'>make_table</span>(<span class='ident'>ECMA</span>);
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<span class='kw'>pub</span> <span class='kw'>static</span> <span class='kw-2'>ref</span> <span class='ident'>ISO_TABLE</span>: [<span class='ident'>u64</span>; <span class='number'>256</span>] <span class='op'>=</span> <span class='ident'>make_table</span>(<span class='ident'>ISO</span>);
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}
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<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>Digest</span> {
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<span class='ident'>table</span>: [<span class='ident'>u64</span>; <span class='number'>256</span>],
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<span class='ident'>initial</span>: <span class='ident'>u64</span>,
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<span class='ident'>value</span>: <span class='ident'>u64</span>
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}
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<span class='kw'>pub</span> <span class='kw'>trait</span> <span class='ident'>Hasher64</span> {
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<span class='kw'>fn</span> <span class='ident'>reset</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>);
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<span class='kw'>fn</span> <span class='ident'>write</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>bytes</span>: <span class='kw-2'>&</span>[<span class='ident'>u8</span>]);
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<span class='kw'>fn</span> <span class='ident'>sum64</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>u64</span>;
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}
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<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>make_table</span>(<span class='ident'>poly</span>: <span class='ident'>u64</span>) <span class='op'>-></span> [<span class='ident'>u64</span>; <span class='number'>256</span>] {
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<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>table</span> <span class='op'>=</span> [<span class='number'>0u64</span>; <span class='number'>256</span>];
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<span class='kw'>for</span> <span class='ident'>i</span> <span class='kw'>in</span> <span class='number'>0</span>..<span class='number'>256</span> {
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<span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>value</span> <span class='op'>=</span> <span class='ident'>i</span> <span class='kw'>as</span> <span class='ident'>u64</span>;
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<span class='kw'>for</span> _ <span class='kw'>in</span> <span class='number'>0</span>..<span class='number'>8</span> {
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<span class='ident'>value</span> <span class='op'>=</span> <span class='kw'>if</span> (<span class='ident'>value</span> <span class='kw-2'>&</span> <span class='number'>1</span>) <span class='op'>==</span> <span class='number'>1</span> {
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(<span class='ident'>value</span> <span class='op'>>></span> <span class='number'>1</span>) <span class='op'>^</span> <span class='ident'>poly</span>
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} <span class='kw'>else</span> {
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<span class='ident'>value</span> <span class='op'>>></span> <span class='number'>1</span>
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}
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}
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<span class='ident'>table</span>[<span class='ident'>i</span>] <span class='op'>=</span> <span class='ident'>value</span>;
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}
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<span class='ident'>table</span>
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}
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<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>update</span>(<span class='kw-2'>mut</span> <span class='ident'>value</span>: <span class='ident'>u64</span>, <span class='ident'>table</span>: <span class='kw-2'>&</span>[<span class='ident'>u64</span>; <span class='number'>256</span>], <span class='ident'>bytes</span>: <span class='kw-2'>&</span>[<span class='ident'>u8</span>]) <span class='op'>-></span> <span class='ident'>u64</span> {
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<span class='ident'>value</span> <span class='op'>=</span> <span class='op'>!</span><span class='ident'>value</span>;
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<span class='kw'>for</span> <span class='kw-2'>&</span><span class='ident'>i</span> <span class='kw'>in</span> <span class='ident'>bytes</span>.<span class='ident'>iter</span>() {
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<span class='ident'>value</span> <span class='op'>=</span> <span class='ident'>table</span>[((<span class='ident'>value</span> <span class='kw'>as</span> <span class='ident'>u8</span>) <span class='op'>^</span> <span class='ident'>i</span>) <span class='kw'>as</span> <span class='ident'>usize</span>] <span class='op'>^</span> (<span class='ident'>value</span> <span class='op'>>></span> <span class='number'>8</span>)
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}
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<span class='op'>!</span><span class='ident'>value</span>
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||
}
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||
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<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>checksum_ecma</span>(<span class='ident'>bytes</span>: <span class='kw-2'>&</span>[<span class='ident'>u8</span>]) <span class='op'>-></span> <span class='ident'>u64</span> {
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<span class='kw'>return</span> <span class='ident'>update</span>(<span class='number'>0</span>, <span class='kw-2'>&</span><span class='ident'>ECMA_TABLE</span>, <span class='ident'>bytes</span>);
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||
}
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||
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<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>checksum_iso</span>(<span class='ident'>bytes</span>: <span class='kw-2'>&</span>[<span class='ident'>u8</span>]) <span class='op'>-></span> <span class='ident'>u64</span> {
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<span class='kw'>return</span> <span class='ident'>update</span>(<span class='number'>0</span>, <span class='kw-2'>&</span><span class='ident'>ISO_TABLE</span>, <span class='ident'>bytes</span>);
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||
}
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||
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||
<span class='kw'>impl</span> <span class='ident'>Digest</span> {
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||
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>new</span>(<span class='ident'>poly</span>: <span class='ident'>u64</span>) <span class='op'>-></span> <span class='ident'>Digest</span> {
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<span class='ident'>Digest</span> {
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<span class='ident'>table</span>: <span class='ident'>make_table</span>(<span class='ident'>poly</span>),
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<span class='ident'>initial</span>: <span class='number'>0</span>,
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<span class='ident'>value</span>: <span class='number'>0</span>
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}
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}
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||
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<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>new_with_initial</span>(<span class='ident'>poly</span>: <span class='ident'>u64</span>, <span class='ident'>initial</span>: <span class='ident'>u64</span>) <span class='op'>-></span> <span class='ident'>Digest</span> {
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||
<span class='ident'>Digest</span> {
|
||
<span class='ident'>table</span>: <span class='ident'>make_table</span>(<span class='ident'>poly</span>),
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||
<span class='ident'>initial</span>: <span class='ident'>initial</span>,
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||
<span class='ident'>value</span>: <span class='ident'>initial</span>
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||
}
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||
}
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||
}
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||
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<span class='kw'>impl</span> <span class='ident'>Hasher64</span> <span class='kw'>for</span> <span class='ident'>Digest</span> {
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||
<span class='kw'>fn</span> <span class='ident'>reset</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>) {
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||
<span class='self'>self</span>.<span class='ident'>value</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>initial</span>;
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||
}
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||
<span class='kw'>fn</span> <span class='ident'>write</span>(<span class='kw-2'>&</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>bytes</span>: <span class='kw-2'>&</span>[<span class='ident'>u8</span>]) {
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||
<span class='self'>self</span>.<span class='ident'>value</span> <span class='op'>=</span> <span class='ident'>update</span>(<span class='self'>self</span>.<span class='ident'>value</span>, <span class='kw-2'>&</span><span class='self'>self</span>.<span class='ident'>table</span>, <span class='ident'>bytes</span>);
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||
}
|
||
<span class='kw'>fn</span> <span class='ident'>sum64</span>(<span class='kw-2'>&</span><span class='self'>self</span>) <span class='op'>-></span> <span class='ident'>u64</span> {
|
||
<span class='self'>self</span>.<span class='ident'>value</span>
|
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}
|
||
}
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</pre>
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