<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="generator" content="rustdoc">
    <meta name="description" content="Source to the Rust file `/home/travis/.cargo/registry/src/github.com-1ecc6299db9ec823/solicit-0.4.4/src/http/frame/mod.rs`.">
    <meta name="keywords" content="rust, rustlang, rust-lang">

    <title>mod.rs.html -- source</title>

    <link rel="stylesheet" type="text/css" href="../../../../rustdoc.css">
    <link rel="stylesheet" type="text/css" href="../../../../main.css">
    

    
    
</head>
<body class="rustdoc">
    <!--[if lte IE 8]>
    <div class="warning">
        This old browser is unsupported and will most likely display funky
        things.
    </div>
    <![endif]-->

    

    <nav class="sidebar">
        
        
    </nav>

    <nav class="sub">
        <form class="search-form js-only">
            <div class="search-container">
                <input class="search-input" name="search"
                       autocomplete="off"
                       placeholder="Click or press ‘S’ to search, ‘?’ for more options…"
                       type="search">
            </div>
        </form>
    </nav>

    <section id='main' class="content source"><pre class="line-numbers"><span id="1">  1</span>
<span id="2">  2</span>
<span id="3">  3</span>
<span id="4">  4</span>
<span id="5">  5</span>
<span id="6">  6</span>
<span id="7">  7</span>
<span id="8">  8</span>
<span id="9">  9</span>
<span id="10"> 10</span>
<span id="11"> 11</span>
<span id="12"> 12</span>
<span id="13"> 13</span>
<span id="14"> 14</span>
<span id="15"> 15</span>
<span id="16"> 16</span>
<span id="17"> 17</span>
<span id="18"> 18</span>
<span id="19"> 19</span>
<span id="20"> 20</span>
<span id="21"> 21</span>
<span id="22"> 22</span>
<span id="23"> 23</span>
<span id="24"> 24</span>
<span id="25"> 25</span>
<span id="26"> 26</span>
<span id="27"> 27</span>
<span id="28"> 28</span>
<span id="29"> 29</span>
<span id="30"> 30</span>
<span id="31"> 31</span>
<span id="32"> 32</span>
<span id="33"> 33</span>
<span id="34"> 34</span>
<span id="35"> 35</span>
<span id="36"> 36</span>
<span id="37"> 37</span>
<span id="38"> 38</span>
<span id="39"> 39</span>
<span id="40"> 40</span>
<span id="41"> 41</span>
<span id="42"> 42</span>
<span id="43"> 43</span>
<span id="44"> 44</span>
<span id="45"> 45</span>
<span id="46"> 46</span>
<span id="47"> 47</span>
<span id="48"> 48</span>
<span id="49"> 49</span>
<span id="50"> 50</span>
<span id="51"> 51</span>
<span id="52"> 52</span>
<span id="53"> 53</span>
<span id="54"> 54</span>
<span id="55"> 55</span>
<span id="56"> 56</span>
<span id="57"> 57</span>
<span id="58"> 58</span>
<span id="59"> 59</span>
<span id="60"> 60</span>
<span id="61"> 61</span>
<span id="62"> 62</span>
<span id="63"> 63</span>
<span id="64"> 64</span>
<span id="65"> 65</span>
<span id="66"> 66</span>
<span id="67"> 67</span>
<span id="68"> 68</span>
<span id="69"> 69</span>
<span id="70"> 70</span>
<span id="71"> 71</span>
<span id="72"> 72</span>
<span id="73"> 73</span>
<span id="74"> 74</span>
<span id="75"> 75</span>
<span id="76"> 76</span>
<span id="77"> 77</span>
<span id="78"> 78</span>
<span id="79"> 79</span>
<span id="80"> 80</span>
<span id="81"> 81</span>
<span id="82"> 82</span>
<span id="83"> 83</span>
<span id="84"> 84</span>
<span id="85"> 85</span>
<span id="86"> 86</span>
<span id="87"> 87</span>
<span id="88"> 88</span>
<span id="89"> 89</span>
<span id="90"> 90</span>
<span id="91"> 91</span>
<span id="92"> 92</span>
<span id="93"> 93</span>
<span id="94"> 94</span>
<span id="95"> 95</span>
<span id="96"> 96</span>
<span id="97"> 97</span>
<span id="98"> 98</span>
<span id="99"> 99</span>
<span id="100">100</span>
<span id="101">101</span>
<span id="102">102</span>
<span id="103">103</span>
<span id="104">104</span>
<span id="105">105</span>
<span id="106">106</span>
<span id="107">107</span>
<span id="108">108</span>
<span id="109">109</span>
<span id="110">110</span>
<span id="111">111</span>
<span id="112">112</span>
<span id="113">113</span>
<span id="114">114</span>
<span id="115">115</span>
<span id="116">116</span>
<span id="117">117</span>
<span id="118">118</span>
<span id="119">119</span>
<span id="120">120</span>
<span id="121">121</span>
<span id="122">122</span>
<span id="123">123</span>
<span id="124">124</span>
<span id="125">125</span>
<span id="126">126</span>
<span id="127">127</span>
<span id="128">128</span>
<span id="129">129</span>
<span id="130">130</span>
<span id="131">131</span>
<span id="132">132</span>
<span id="133">133</span>
<span id="134">134</span>
<span id="135">135</span>
<span id="136">136</span>
<span id="137">137</span>
<span id="138">138</span>
<span id="139">139</span>
<span id="140">140</span>
<span id="141">141</span>
<span id="142">142</span>
<span id="143">143</span>
<span id="144">144</span>
<span id="145">145</span>
<span id="146">146</span>
<span id="147">147</span>
<span id="148">148</span>
<span id="149">149</span>
<span id="150">150</span>
<span id="151">151</span>
<span id="152">152</span>
<span id="153">153</span>
<span id="154">154</span>
<span id="155">155</span>
<span id="156">156</span>
<span id="157">157</span>
<span id="158">158</span>
<span id="159">159</span>
<span id="160">160</span>
<span id="161">161</span>
<span id="162">162</span>
<span id="163">163</span>
<span id="164">164</span>
<span id="165">165</span>
<span id="166">166</span>
<span id="167">167</span>
<span id="168">168</span>
<span id="169">169</span>
<span id="170">170</span>
<span id="171">171</span>
<span id="172">172</span>
<span id="173">173</span>
<span id="174">174</span>
<span id="175">175</span>
<span id="176">176</span>
<span id="177">177</span>
<span id="178">178</span>
<span id="179">179</span>
<span id="180">180</span>
<span id="181">181</span>
<span id="182">182</span>
<span id="183">183</span>
<span id="184">184</span>
<span id="185">185</span>
<span id="186">186</span>
<span id="187">187</span>
<span id="188">188</span>
<span id="189">189</span>
<span id="190">190</span>
<span id="191">191</span>
<span id="192">192</span>
<span id="193">193</span>
<span id="194">194</span>
<span id="195">195</span>
<span id="196">196</span>
<span id="197">197</span>
<span id="198">198</span>
<span id="199">199</span>
<span id="200">200</span>
<span id="201">201</span>
<span id="202">202</span>
<span id="203">203</span>
<span id="204">204</span>
<span id="205">205</span>
<span id="206">206</span>
<span id="207">207</span>
<span id="208">208</span>
<span id="209">209</span>
<span id="210">210</span>
<span id="211">211</span>
<span id="212">212</span>
<span id="213">213</span>
<span id="214">214</span>
<span id="215">215</span>
<span id="216">216</span>
<span id="217">217</span>
<span id="218">218</span>
<span id="219">219</span>
<span id="220">220</span>
<span id="221">221</span>
<span id="222">222</span>
<span id="223">223</span>
<span id="224">224</span>
<span id="225">225</span>
<span id="226">226</span>
<span id="227">227</span>
<span id="228">228</span>
<span id="229">229</span>
<span id="230">230</span>
<span id="231">231</span>
<span id="232">232</span>
<span id="233">233</span>
<span id="234">234</span>
<span id="235">235</span>
<span id="236">236</span>
<span id="237">237</span>
<span id="238">238</span>
<span id="239">239</span>
<span id="240">240</span>
<span id="241">241</span>
<span id="242">242</span>
<span id="243">243</span>
<span id="244">244</span>
<span id="245">245</span>
<span id="246">246</span>
<span id="247">247</span>
<span id="248">248</span>
<span id="249">249</span>
<span id="250">250</span>
<span id="251">251</span>
<span id="252">252</span>
<span id="253">253</span>
<span id="254">254</span>
<span id="255">255</span>
<span id="256">256</span>
<span id="257">257</span>
<span id="258">258</span>
<span id="259">259</span>
<span id="260">260</span>
<span id="261">261</span>
<span id="262">262</span>
<span id="263">263</span>
<span id="264">264</span>
<span id="265">265</span>
<span id="266">266</span>
<span id="267">267</span>
<span id="268">268</span>
<span id="269">269</span>
<span id="270">270</span>
<span id="271">271</span>
<span id="272">272</span>
<span id="273">273</span>
<span id="274">274</span>
<span id="275">275</span>
<span id="276">276</span>
<span id="277">277</span>
<span id="278">278</span>
<span id="279">279</span>
<span id="280">280</span>
<span id="281">281</span>
<span id="282">282</span>
<span id="283">283</span>
<span id="284">284</span>
<span id="285">285</span>
<span id="286">286</span>
<span id="287">287</span>
<span id="288">288</span>
<span id="289">289</span>
<span id="290">290</span>
<span id="291">291</span>
<span id="292">292</span>
<span id="293">293</span>
<span id="294">294</span>
<span id="295">295</span>
<span id="296">296</span>
<span id="297">297</span>
<span id="298">298</span>
<span id="299">299</span>
<span id="300">300</span>
<span id="301">301</span>
<span id="302">302</span>
<span id="303">303</span>
<span id="304">304</span>
<span id="305">305</span>
<span id="306">306</span>
<span id="307">307</span>
<span id="308">308</span>
<span id="309">309</span>
<span id="310">310</span>
<span id="311">311</span>
<span id="312">312</span>
<span id="313">313</span>
<span id="314">314</span>
<span id="315">315</span>
<span id="316">316</span>
<span id="317">317</span>
<span id="318">318</span>
<span id="319">319</span>
<span id="320">320</span>
<span id="321">321</span>
<span id="322">322</span>
<span id="323">323</span>
<span id="324">324</span>
<span id="325">325</span>
<span id="326">326</span>
<span id="327">327</span>
<span id="328">328</span>
<span id="329">329</span>
<span id="330">330</span>
<span id="331">331</span>
<span id="332">332</span>
<span id="333">333</span>
<span id="334">334</span>
<span id="335">335</span>
<span id="336">336</span>
<span id="337">337</span>
<span id="338">338</span>
<span id="339">339</span>
<span id="340">340</span>
<span id="341">341</span>
<span id="342">342</span>
<span id="343">343</span>
<span id="344">344</span>
<span id="345">345</span>
<span id="346">346</span>
<span id="347">347</span>
<span id="348">348</span>
<span id="349">349</span>
<span id="350">350</span>
<span id="351">351</span>
<span id="352">352</span>
<span id="353">353</span>
<span id="354">354</span>
<span id="355">355</span>
<span id="356">356</span>
<span id="357">357</span>
<span id="358">358</span>
<span id="359">359</span>
<span id="360">360</span>
<span id="361">361</span>
<span id="362">362</span>
<span id="363">363</span>
<span id="364">364</span>
<span id="365">365</span>
<span id="366">366</span>
<span id="367">367</span>
<span id="368">368</span>
<span id="369">369</span>
<span id="370">370</span>
<span id="371">371</span>
<span id="372">372</span>
<span id="373">373</span>
<span id="374">374</span>
<span id="375">375</span>
<span id="376">376</span>
<span id="377">377</span>
<span id="378">378</span>
<span id="379">379</span>
<span id="380">380</span>
<span id="381">381</span>
<span id="382">382</span>
<span id="383">383</span>
<span id="384">384</span>
<span id="385">385</span>
<span id="386">386</span>
<span id="387">387</span>
<span id="388">388</span>
<span id="389">389</span>
<span id="390">390</span>
<span id="391">391</span>
<span id="392">392</span>
<span id="393">393</span>
<span id="394">394</span>
<span id="395">395</span>
<span id="396">396</span>
<span id="397">397</span>
<span id="398">398</span>
<span id="399">399</span>
<span id="400">400</span>
<span id="401">401</span>
<span id="402">402</span>
<span id="403">403</span>
<span id="404">404</span>
<span id="405">405</span>
<span id="406">406</span>
<span id="407">407</span>
<span id="408">408</span>
<span id="409">409</span>
<span id="410">410</span>
<span id="411">411</span>
<span id="412">412</span>
<span id="413">413</span>
<span id="414">414</span>
<span id="415">415</span>
<span id="416">416</span>
<span id="417">417</span>
<span id="418">418</span>
<span id="419">419</span>
<span id="420">420</span>
<span id="421">421</span>
<span id="422">422</span>
<span id="423">423</span>
<span id="424">424</span>
<span id="425">425</span>
<span id="426">426</span>
<span id="427">427</span>
<span id="428">428</span>
<span id="429">429</span>
<span id="430">430</span>
<span id="431">431</span>
<span id="432">432</span>
<span id="433">433</span>
<span id="434">434</span>
<span id="435">435</span>
<span id="436">436</span>
<span id="437">437</span>
<span id="438">438</span>
<span id="439">439</span>
<span id="440">440</span>
<span id="441">441</span>
<span id="442">442</span>
<span id="443">443</span>
<span id="444">444</span>
<span id="445">445</span>
<span id="446">446</span>
<span id="447">447</span>
<span id="448">448</span>
<span id="449">449</span>
<span id="450">450</span>
<span id="451">451</span>
<span id="452">452</span>
<span id="453">453</span>
<span id="454">454</span>
<span id="455">455</span>
<span id="456">456</span>
<span id="457">457</span>
<span id="458">458</span>
<span id="459">459</span>
<span id="460">460</span>
<span id="461">461</span>
<span id="462">462</span>
<span id="463">463</span>
<span id="464">464</span>
<span id="465">465</span>
<span id="466">466</span>
<span id="467">467</span>
<span id="468">468</span>
<span id="469">469</span>
<span id="470">470</span>
<span id="471">471</span>
<span id="472">472</span>
<span id="473">473</span>
<span id="474">474</span>
<span id="475">475</span>
<span id="476">476</span>
<span id="477">477</span>
<span id="478">478</span>
<span id="479">479</span>
<span id="480">480</span>
<span id="481">481</span>
<span id="482">482</span>
<span id="483">483</span>
<span id="484">484</span>
<span id="485">485</span>
<span id="486">486</span>
<span id="487">487</span>
<span id="488">488</span>
<span id="489">489</span>
<span id="490">490</span>
<span id="491">491</span>
<span id="492">492</span>
<span id="493">493</span>
<span id="494">494</span>
<span id="495">495</span>
<span id="496">496</span>
<span id="497">497</span>
<span id="498">498</span>
<span id="499">499</span>
<span id="500">500</span>
<span id="501">501</span>
<span id="502">502</span>
<span id="503">503</span>
<span id="504">504</span>
<span id="505">505</span>
<span id="506">506</span>
<span id="507">507</span>
<span id="508">508</span>
<span id="509">509</span>
<span id="510">510</span>
<span id="511">511</span>
<span id="512">512</span>
<span id="513">513</span>
<span id="514">514</span>
<span id="515">515</span>
<span id="516">516</span>
<span id="517">517</span>
<span id="518">518</span>
<span id="519">519</span>
<span id="520">520</span>
<span id="521">521</span>
<span id="522">522</span>
<span id="523">523</span>
<span id="524">524</span>
<span id="525">525</span>
<span id="526">526</span>
<span id="527">527</span>
<span id="528">528</span>
<span id="529">529</span>
<span id="530">530</span>
<span id="531">531</span>
<span id="532">532</span>
<span id="533">533</span>
<span id="534">534</span>
<span id="535">535</span>
<span id="536">536</span>
<span id="537">537</span>
<span id="538">538</span>
<span id="539">539</span>
<span id="540">540</span>
<span id="541">541</span>
<span id="542">542</span>
<span id="543">543</span>
<span id="544">544</span>
<span id="545">545</span>
<span id="546">546</span>
<span id="547">547</span>
<span id="548">548</span>
<span id="549">549</span>
<span id="550">550</span>
<span id="551">551</span>
<span id="552">552</span>
<span id="553">553</span>
<span id="554">554</span>
<span id="555">555</span>
<span id="556">556</span>
<span id="557">557</span>
<span id="558">558</span>
<span id="559">559</span>
<span id="560">560</span>
<span id="561">561</span>
<span id="562">562</span>
<span id="563">563</span>
<span id="564">564</span>
<span id="565">565</span>
<span id="566">566</span>
<span id="567">567</span>
<span id="568">568</span>
<span id="569">569</span>
<span id="570">570</span>
<span id="571">571</span>
<span id="572">572</span>
<span id="573">573</span>
<span id="574">574</span>
<span id="575">575</span>
<span id="576">576</span>
<span id="577">577</span>
<span id="578">578</span>
<span id="579">579</span>
<span id="580">580</span>
<span id="581">581</span>
<span id="582">582</span>
<span id="583">583</span>
<span id="584">584</span>
<span id="585">585</span>
<span id="586">586</span>
<span id="587">587</span>
<span id="588">588</span>
<span id="589">589</span>
<span id="590">590</span>
<span id="591">591</span>
<span id="592">592</span>
</pre><pre class='rust '>
<span class='doccomment'>//! The module contains the implementation of HTTP/2 frames.</span>

<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>mem</span>;

<span class='kw'>use</span> <span class='ident'>http</span>::<span class='ident'>StreamId</span>;

<span class='doccomment'>/// A helper macro that unpacks a sequence of 4 bytes found in the buffer with</span>
<span class='doccomment'>/// the given identifier, starting at the given offset, into the given integer</span>
<span class='doccomment'>/// type. Obviously, the integer type should be able to support at least 4</span>
<span class='doccomment'>/// bytes.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// # Examples</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// ```rust</span>
<span class='doccomment'>/// let buf: [u8; 4] = [0, 0, 0, 1];</span>
<span class='doccomment'>/// assert_eq!(1u32, unpack_octets_4!(buf, 0, u32));</span>
<span class='doccomment'>/// ```</span>
<span class='attribute'>#[<span class='ident'>macro_escape</span>]</span>
<span class='macro'>macro_rules</span><span class='macro'>!</span> <span class='ident'>unpack_octets_4</span> {
    (<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>buf</span>:<span class='ident'>ident</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>offset</span>:<span class='ident'>expr</span>, <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>tip</span>:<span class='ident'>ty</span>) <span class='op'>=&gt;</span> (
        ((<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>buf</span>[<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>offset</span> <span class='op'>+</span> <span class='number'>0</span>] <span class='kw'>as</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>tip</span>) <span class='op'>&lt;&lt;</span> <span class='number'>24</span>) <span class='op'>|</span>
        ((<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>buf</span>[<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>offset</span> <span class='op'>+</span> <span class='number'>1</span>] <span class='kw'>as</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>tip</span>) <span class='op'>&lt;&lt;</span> <span class='number'>16</span>) <span class='op'>|</span>
        ((<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>buf</span>[<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>offset</span> <span class='op'>+</span> <span class='number'>2</span>] <span class='kw'>as</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>tip</span>) <span class='op'>&lt;&lt;</span>  <span class='number'>8</span>) <span class='op'>|</span>
        ((<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>buf</span>[<span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>offset</span> <span class='op'>+</span> <span class='number'>3</span>] <span class='kw'>as</span> <span class='macro-nonterminal'>$</span><span class='macro-nonterminal'>tip</span>) <span class='op'>&lt;&lt;</span>  <span class='number'>0</span>)
    );
}

<span class='kw'>pub</span> <span class='kw'>mod</span> <span class='ident'>data</span>;
<span class='kw'>pub</span> <span class='kw'>mod</span> <span class='ident'>headers</span>;
<span class='kw'>pub</span> <span class='kw'>mod</span> <span class='ident'>settings</span>;

<span class='doccomment'>/// Rexports related to the `DATA` frame.</span>
<span class='kw'>pub</span> <span class='kw'>use</span> <span class='self'>self</span>::<span class='ident'>data</span>::{<span class='ident'>DataFlag</span>, <span class='ident'>DataFrame</span>};
<span class='doccomment'>/// Rexports related to the `HEADERS` frame.</span>
<span class='kw'>pub</span> <span class='kw'>use</span> <span class='self'>self</span>::<span class='ident'>headers</span>::{<span class='ident'>HeadersFlag</span>, <span class='ident'>HeadersFrame</span>};
<span class='doccomment'>/// Rexports related to the `SETTINGS` frame.</span>
<span class='kw'>pub</span> <span class='kw'>use</span> <span class='self'>self</span>::<span class='ident'>settings</span>::{<span class='ident'>SettingsFlag</span>, <span class='ident'>SettingsFrame</span>, <span class='ident'>HttpSetting</span>};

<span class='doccomment'>/// An alias for the 9-byte buffer that each HTTP/2 frame header must be stored</span>
<span class='doccomment'>/// in.</span>
<span class='kw'>pub</span> <span class='kw'>type</span> <span class='ident'>FrameHeaderBuffer</span> <span class='op'>=</span> [<span class='ident'>u8</span>; <span class='number'>9</span>];
<span class='doccomment'>/// An alias for the 4-tuple representing the components of each HTTP/2 frame</span>
<span class='doccomment'>/// header.</span>
<span class='kw'>pub</span> <span class='kw'>type</span> <span class='ident'>FrameHeader</span> <span class='op'>=</span> (<span class='ident'>u32</span>, <span class='ident'>u8</span>, <span class='ident'>u8</span>, <span class='ident'>u32</span>);

<span class='doccomment'>/// Deconstructs a `FrameHeader` into its corresponding 4 components,</span>
<span class='doccomment'>/// represented as a 4-tuple: `(length, frame_type, flags, stream_id)`.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// The frame `type` and `flags` components are returned as their original</span>
<span class='doccomment'>/// octet representation, rather than reinterpreted.</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>unpack_header</span>(<span class='ident'>header</span>: <span class='kw-2'>&amp;</span><span class='ident'>FrameHeaderBuffer</span>) <span class='op'>-&gt;</span> <span class='ident'>FrameHeader</span> {
    <span class='kw'>let</span> <span class='ident'>length</span>: <span class='ident'>u32</span> <span class='op'>=</span>
        ((<span class='ident'>header</span>[<span class='number'>0</span>] <span class='kw'>as</span> <span class='ident'>u32</span>) <span class='op'>&lt;&lt;</span> <span class='number'>16</span>) <span class='op'>|</span>
        ((<span class='ident'>header</span>[<span class='number'>1</span>] <span class='kw'>as</span> <span class='ident'>u32</span>) <span class='op'>&lt;&lt;</span>  <span class='number'>8</span>) <span class='op'>|</span>
        ((<span class='ident'>header</span>[<span class='number'>2</span>] <span class='kw'>as</span> <span class='ident'>u32</span>) <span class='op'>&lt;&lt;</span>  <span class='number'>0</span>);
    <span class='kw'>let</span> <span class='ident'>frame_type</span> <span class='op'>=</span> <span class='ident'>header</span>[<span class='number'>3</span>];
    <span class='kw'>let</span> <span class='ident'>flags</span> <span class='op'>=</span> <span class='ident'>header</span>[<span class='number'>4</span>];
    <span class='kw'>let</span> <span class='ident'>stream_id</span>: <span class='ident'>u32</span> <span class='op'>=</span> <span class='macro'>unpack_octets_4</span><span class='macro'>!</span>(<span class='ident'>header</span>, <span class='number'>5</span>, <span class='ident'>u32</span>);

    (<span class='ident'>length</span>, <span class='ident'>frame_type</span>, <span class='ident'>flags</span>, <span class='ident'>stream_id</span>)
}

<span class='doccomment'>/// Constructs a buffer of 9 bytes that represents the given `FrameHeader`.</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>pack_header</span>(<span class='ident'>header</span>: <span class='kw-2'>&amp;</span><span class='ident'>FrameHeader</span>) <span class='op'>-&gt;</span> <span class='ident'>FrameHeaderBuffer</span> {
    <span class='kw'>let</span> <span class='kw-2'>&amp;</span>(<span class='ident'>length</span>, <span class='ident'>frame_type</span>, <span class='ident'>flags</span>, <span class='ident'>stream_id</span>) <span class='op'>=</span> <span class='ident'>header</span>;

    [
        (((<span class='ident'>length</span> <span class='op'>&gt;&gt;</span> <span class='number'>16</span>) <span class='kw-2'>&amp;</span> <span class='number'>0x000000FF</span>) <span class='kw'>as</span> <span class='ident'>u8</span>),
        (((<span class='ident'>length</span> <span class='op'>&gt;&gt;</span>  <span class='number'>8</span>) <span class='kw-2'>&amp;</span> <span class='number'>0x000000FF</span>) <span class='kw'>as</span> <span class='ident'>u8</span>),
        (((<span class='ident'>length</span> <span class='op'>&gt;&gt;</span>  <span class='number'>0</span>) <span class='kw-2'>&amp;</span> <span class='number'>0x000000FF</span>) <span class='kw'>as</span> <span class='ident'>u8</span>),
        <span class='ident'>frame_type</span>,
        <span class='ident'>flags</span>,
        (((<span class='ident'>stream_id</span> <span class='op'>&gt;&gt;</span> <span class='number'>24</span>) <span class='kw-2'>&amp;</span> <span class='number'>0x000000FF</span>) <span class='kw'>as</span> <span class='ident'>u8</span>),
        (((<span class='ident'>stream_id</span> <span class='op'>&gt;&gt;</span> <span class='number'>16</span>) <span class='kw-2'>&amp;</span> <span class='number'>0x000000FF</span>) <span class='kw'>as</span> <span class='ident'>u8</span>),
        (((<span class='ident'>stream_id</span> <span class='op'>&gt;&gt;</span>  <span class='number'>8</span>) <span class='kw-2'>&amp;</span> <span class='number'>0x000000FF</span>) <span class='kw'>as</span> <span class='ident'>u8</span>),
        (((<span class='ident'>stream_id</span> <span class='op'>&gt;&gt;</span>  <span class='number'>0</span>) <span class='kw-2'>&amp;</span> <span class='number'>0x000000FF</span>) <span class='kw'>as</span> <span class='ident'>u8</span>),
    ]
}

<span class='doccomment'>/// A helper function that parses the given payload, considering it padded.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// This means that the first byte is the length of the padding with that many</span>
<span class='doccomment'>/// 0 bytes expected to follow the actual payload.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// # Returns</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// A slice of the given payload where the actual one is found and the length</span>
<span class='doccomment'>/// of the padding.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// If the padded payload is invalid (e.g. the length of the padding is equal</span>
<span class='doccomment'>/// to the total length), returns `None`.</span>
<span class='kw'>fn</span> <span class='ident'>parse_padded_payload</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span><span class='op'>&gt;</span>(<span class='ident'>payload</span>: <span class='kw-2'>&amp;</span><span class='lifetime'>&#39;a</span> [<span class='ident'>u8</span>]) <span class='op'>-&gt;</span> <span class='prelude-ty'>Option</span><span class='op'>&lt;</span>(<span class='kw-2'>&amp;</span><span class='lifetime'>&#39;a</span> [<span class='ident'>u8</span>], <span class='ident'>u8</span>)<span class='op'>&gt;</span> {
    <span class='kw'>if</span> <span class='ident'>payload</span>.<span class='ident'>len</span>() <span class='op'>==</span> <span class='number'>0</span> {
        <span class='comment'>// We make sure not to index the payload before we&#39;re sure how</span>
        <span class='comment'>// large the buffer is.</span>
        <span class='comment'>// If this is the case, the frame is invalid as no padding</span>
        <span class='comment'>// length can be extracted, even though the frame should be</span>
        <span class='comment'>// padded.</span>
        <span class='kw'>return</span> <span class='prelude-val'>None</span>;
    }
    <span class='kw'>let</span> <span class='ident'>pad_len</span> <span class='op'>=</span> <span class='ident'>payload</span>[<span class='number'>0</span>] <span class='kw'>as</span> <span class='ident'>usize</span>;
    <span class='kw'>if</span> <span class='ident'>pad_len</span> <span class='op'>&gt;=</span> <span class='ident'>payload</span>.<span class='ident'>len</span>() {
        <span class='comment'>// This is invalid: the padding length MUST be less than the</span>
        <span class='comment'>// total frame size.</span>
        <span class='kw'>return</span> <span class='prelude-val'>None</span>;
    }

    <span class='prelude-val'>Some</span>((<span class='kw-2'>&amp;</span><span class='ident'>payload</span>[<span class='number'>1</span>..<span class='ident'>payload</span>.<span class='ident'>len</span>() <span class='op'>-</span> <span class='ident'>pad_len</span>], <span class='ident'>pad_len</span> <span class='kw'>as</span> <span class='ident'>u8</span>))
}

<span class='doccomment'>/// A trait that all HTTP/2 frame header flags need to implement.</span>
<span class='kw'>pub</span> <span class='kw'>trait</span> <span class='ident'>Flag</span> {
    <span class='doccomment'>/// Returns a bit mask that represents the flag.</span>
    <span class='kw'>fn</span> <span class='ident'>bitmask</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='ident'>u8</span>;
}

<span class='doccomment'>/// A trait that all HTTP/2 frame structs need to implement.</span>
<span class='kw'>pub</span> <span class='kw'>trait</span> <span class='ident'>Frame</span>: <span class='ident'>Sized</span> {
    <span class='doccomment'>/// The type that represents the flags that the particular `Frame` can take.</span>
    <span class='doccomment'>/// This makes sure that only valid `Flag`s are used with each `Frame`.</span>
    <span class='kw'>type</span> <span class='ident'>FlagType</span>: <span class='ident'>Flag</span>;

    <span class='doccomment'>/// Creates a new `Frame` from the given `RawFrame` (i.e. header and</span>
    <span class='doccomment'>/// payload), if possible.</span>
    <span class='doccomment'>///</span>
    <span class='doccomment'>/// # Returns</span>
    <span class='doccomment'>///</span>
    <span class='doccomment'>/// `None` if a valid `Frame` cannot be constructed from the given</span>
    <span class='doccomment'>/// `RawFrame`. Some reasons why this may happen is a wrong frame type in</span>
    <span class='doccomment'>/// the header, a body that cannot be decoded according to the particular</span>
    <span class='doccomment'>/// frame&#39;s rules, etc.</span>
    <span class='doccomment'>///</span>
    <span class='doccomment'>/// Otherwise, returns a newly constructed `Frame`.</span>
    <span class='kw'>fn</span> <span class='ident'>from_raw</span>(<span class='ident'>raw_frame</span>: <span class='ident'>RawFrame</span>) <span class='op'>-&gt;</span> <span class='prelude-ty'>Option</span><span class='op'>&lt;</span><span class='self'>Self</span><span class='op'>&gt;</span>;

    <span class='doccomment'>/// Tests if the given flag is set for the frame.</span>
    <span class='kw'>fn</span> <span class='ident'>is_set</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>, <span class='ident'>flag</span>: <span class='self'>Self</span>::<span class='ident'>FlagType</span>) <span class='op'>-&gt;</span> <span class='ident'>bool</span>;
    <span class='doccomment'>/// Returns the `StreamId` of the stream to which the frame is associated</span>
    <span class='kw'>fn</span> <span class='ident'>get_stream_id</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='ident'>StreamId</span>;
    <span class='doccomment'>/// Returns a `FrameHeader` based on the current state of the `Frame`.</span>
    <span class='kw'>fn</span> <span class='ident'>get_header</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='ident'>FrameHeader</span>;

    <span class='doccomment'>/// Sets the given flag for the frame.</span>
    <span class='kw'>fn</span> <span class='ident'>set_flag</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>flag</span>: <span class='self'>Self</span>::<span class='ident'>FlagType</span>);

    <span class='doccomment'>/// Returns a `Vec` with the serialized representation of the frame.</span>
    <span class='kw'>fn</span> <span class='ident'>serialize</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>;
}

<span class='doccomment'>/// A struct that defines the format of the raw HTTP/2 frame, i.e. the frame</span>
<span class='doccomment'>/// as it is read from the wire.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// This format is defined in section 4.1. of the HTTP/2 spec.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// The `RawFrame` struct simply stores the raw components of an HTTP/2 frame:</span>
<span class='doccomment'>/// its header and the payload as a sequence of bytes.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// It does not try to interpret the payload bytes, nor do any validation in</span>
<span class='doccomment'>/// terms of its validity based on the frame type given in the header.</span>
<span class='doccomment'>/// It is simply a wrapper around the two parts of an HTTP/2 frame.</span>
<span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>PartialEq</span>)]</span>
<span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Debug</span>)]</span>
<span class='attribute'>#[<span class='ident'>derive</span>(<span class='ident'>Clone</span>)]</span>
<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>RawFrame</span> {
    <span class='doccomment'>/// The raw frame representation, including both the raw header representation</span>
    <span class='doccomment'>/// (in the first 9 bytes), followed by the raw payload representation.</span>
    <span class='ident'>raw_content</span>: <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>,
}

<span class='kw'>impl</span> <span class='ident'>RawFrame</span> {
    <span class='doccomment'>/// Creates a new `RawFrame` with the given `FrameHeader`. The payload is</span>
    <span class='doccomment'>/// left empty.</span>
    <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>new</span>(<span class='ident'>header</span>: <span class='ident'>FrameHeader</span>) <span class='op'>-&gt;</span> <span class='ident'>RawFrame</span> {
        <span class='ident'>RawFrame</span>::<span class='ident'>with_payload</span>(<span class='ident'>header</span>, <span class='ident'>Vec</span>::<span class='ident'>new</span>())
    }

    <span class='doccomment'>/// Creates a new `RawFrame` with the given header and payload.</span>
    <span class='doccomment'>/// Does not do any validation to determine whether the frame is in a correct</span>
    <span class='doccomment'>/// state as constructed.</span>
    <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>with_payload</span>(<span class='ident'>header</span>: <span class='ident'>FrameHeader</span>, <span class='ident'>payload</span>: <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>) <span class='op'>-&gt;</span> <span class='ident'>RawFrame</span> {
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>raw</span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>new</span>();
        <span class='ident'>raw</span>.<span class='ident'>extend</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&amp;</span><span class='ident'>header</span>).<span class='ident'>into_iter</span>().<span class='ident'>map</span>(<span class='op'>|</span><span class='ident'>x</span><span class='op'>|</span> <span class='op'>*</span><span class='ident'>x</span>));
        <span class='ident'>raw</span>.<span class='ident'>extend</span>(<span class='ident'>payload</span>);

        <span class='ident'>RawFrame</span> {
            <span class='ident'>raw_content</span>: <span class='ident'>raw</span>,
        }
    }

    <span class='doccomment'>/// Creates a new `RawFrame` by parsing the given buffer.</span>
    <span class='doccomment'>///</span>
    <span class='doccomment'>/// # Returns</span>
    <span class='doccomment'>///</span>
    <span class='doccomment'>/// A `RawFrame` instance constructed from the given buffer.</span>
    <span class='doccomment'>///</span>
    <span class='doccomment'>/// If the buffer cannot be parsed into a frame, which includes the payload</span>
    <span class='doccomment'>/// section having a different length than what was found in the header,</span>
    <span class='doccomment'>/// `None` is returned.</span>
    <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>from_buf</span>(<span class='ident'>buf</span>: <span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>]) <span class='op'>-&gt;</span> <span class='prelude-ty'>Option</span><span class='op'>&lt;</span><span class='ident'>RawFrame</span><span class='op'>&gt;</span> {
        <span class='kw'>if</span> <span class='ident'>buf</span>.<span class='ident'>len</span>() <span class='op'>&lt;</span> <span class='number'>9</span> {
            <span class='kw'>return</span> <span class='prelude-val'>None</span>;
        }
        <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> <span class='ident'>unpack_header</span>(<span class='kw'>unsafe</span> {
            <span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>buf</span>.<span class='ident'>len</span>() <span class='op'>&gt;=</span> <span class='number'>9</span>);
            <span class='comment'>// We just asserted that this transmute is safe.</span>
            <span class='ident'>mem</span>::<span class='ident'>transmute</span>(<span class='ident'>buf</span>.<span class='ident'>as_ptr</span>())
        });
        <span class='kw'>let</span> <span class='ident'>payload_len</span> <span class='op'>=</span> <span class='ident'>header</span>.<span class='number'>0</span> <span class='kw'>as</span> <span class='ident'>usize</span>;

        <span class='kw'>if</span> <span class='ident'>buf</span>[<span class='number'>9</span>..].<span class='ident'>len</span>() <span class='op'>!=</span> <span class='ident'>payload_len</span> {
            <span class='kw'>return</span> <span class='prelude-val'>None</span>;
        }

        <span class='prelude-val'>Some</span>(<span class='ident'>RawFrame</span> {
            <span class='ident'>raw_content</span>: <span class='ident'>buf</span>.<span class='ident'>to_vec</span>(),
        })
    }

    <span class='doccomment'>/// Returns a `Vec` of bytes representing the serialized (on-the-wire)</span>
    <span class='doccomment'>/// representation of this raw frame.</span>
    <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>serialize</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span> {
        <span class='self'>self</span>.<span class='ident'>raw_content</span>.<span class='ident'>clone</span>()
    }

    <span class='doccomment'>/// Returns a `FrameHeader` instance corresponding to the headers of the</span>
    <span class='doccomment'>/// `RawFrame`.</span>
    <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>header</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='ident'>FrameHeader</span> {
        <span class='ident'>unpack_header</span>(<span class='kw'>unsafe</span> {
            <span class='macro'>assert</span><span class='macro'>!</span>(<span class='self'>self</span>.<span class='ident'>raw_content</span>.<span class='ident'>len</span>() <span class='op'>&gt;=</span> <span class='number'>9</span>);
            <span class='comment'>// We just asserted that this transmute is safe.</span>
            <span class='ident'>mem</span>::<span class='ident'>transmute</span>(<span class='self'>self</span>.<span class='ident'>raw_content</span>.<span class='ident'>as_ptr</span>())
        })
    }

    <span class='doccomment'>/// Returns a slice representing the payload of the `RawFrame`.</span>
    <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>payload</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>] {
        <span class='kw-2'>&amp;</span><span class='self'>self</span>.<span class='ident'>raw_content</span>[<span class='number'>9</span>..]
    }
}

<span class='doccomment'>/// Provide a conversion into a `Vec`.</span>
<span class='kw'>impl</span> <span class='ident'>Into</span><span class='op'>&lt;</span><span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;&gt;</span> <span class='kw'>for</span> <span class='ident'>RawFrame</span> {
    <span class='kw'>fn</span> <span class='ident'>into</span>(<span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span> { <span class='self'>self</span>.<span class='ident'>raw_content</span> }
}

<span class='doccomment'>/// Provide a conversion from a `Vec`.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// This conversion is unchecked and could cause the resulting `RawFrame` to be an</span>
<span class='doccomment'>/// invalid HTTP/2 frame.</span>
<span class='kw'>impl</span> <span class='ident'>From</span><span class='op'>&lt;</span><span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;&gt;</span> <span class='kw'>for</span> <span class='ident'>RawFrame</span> {
    <span class='kw'>fn</span> <span class='ident'>from</span>(<span class='ident'>raw</span>: <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>) <span class='op'>-&gt;</span> <span class='ident'>RawFrame</span> { <span class='ident'>RawFrame</span> { <span class='ident'>raw_content</span>: <span class='ident'>raw</span> } }
}

<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>test</span>)]</span>
<span class='kw'>mod</span> <span class='ident'>tests</span> {
    <span class='kw'>use</span> <span class='kw'>super</span>::{
        <span class='ident'>unpack_header</span>,
        <span class='ident'>pack_header</span>,
        <span class='ident'>RawFrame</span>,
        <span class='ident'>FrameHeader</span>,
        <span class='ident'>Frame</span>,
    };

    <span class='doccomment'>/// Tests that the `unpack_header` function correctly returns the</span>
    <span class='doccomment'>/// components of HTTP/2 frame headers.</span>
    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_unpack_header</span>() {
        {
            <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>0</span>; <span class='number'>9</span>];
            <span class='macro'>assert_eq</span><span class='macro'>!</span>((<span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>), <span class='ident'>unpack_header</span>(<span class='kw-2'>&amp;</span><span class='ident'>header</span>));
        }
        {
            <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>, <span class='number'>2</span>, <span class='number'>3</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>4</span>];
            <span class='macro'>assert_eq</span><span class='macro'>!</span>((<span class='number'>1</span>, <span class='number'>2</span>, <span class='number'>3</span>, <span class='number'>4</span>), <span class='ident'>unpack_header</span>(<span class='kw-2'>&amp;</span><span class='ident'>header</span>));
        }
        {
            <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>, <span class='number'>200</span>, <span class='number'>100</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>4</span>];
            <span class='macro'>assert_eq</span><span class='macro'>!</span>((<span class='number'>1</span>, <span class='number'>200</span>, <span class='number'>100</span>, <span class='number'>4</span>), <span class='ident'>unpack_header</span>(<span class='kw-2'>&amp;</span><span class='ident'>header</span>));
        }
        {
            <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>];
            <span class='macro'>assert_eq</span><span class='macro'>!</span>((<span class='number'>1</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>), <span class='ident'>unpack_header</span>(<span class='kw-2'>&amp;</span><span class='ident'>header</span>));
        }
        {
            <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>0</span>, <span class='number'>1</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>];
            <span class='macro'>assert_eq</span><span class='macro'>!</span>((<span class='number'>256</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>), <span class='ident'>unpack_header</span>(<span class='kw-2'>&amp;</span><span class='ident'>header</span>));
        }
        {
            <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>1</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>];
            <span class='macro'>assert_eq</span><span class='macro'>!</span>((<span class='number'>256</span> <span class='op'>*</span> <span class='number'>256</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>), <span class='ident'>unpack_header</span>(<span class='kw-2'>&amp;</span><span class='ident'>header</span>));
        }
        {
            <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>];
            <span class='macro'>assert_eq</span><span class='macro'>!</span>((<span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>), <span class='ident'>unpack_header</span>(<span class='kw-2'>&amp;</span><span class='ident'>header</span>));
        }
        {
            <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>0xFF</span>, <span class='number'>0xFF</span>, <span class='number'>0xFF</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>];
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(((<span class='number'>1</span> <span class='op'>&lt;&lt;</span> <span class='number'>24</span>) <span class='op'>-</span> <span class='number'>1</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>), <span class='ident'>unpack_header</span>(<span class='kw-2'>&amp;</span><span class='ident'>header</span>));
        }
        {
            <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>0xFF</span>, <span class='number'>0xFF</span>, <span class='number'>0xFF</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>, <span class='number'>1</span>, <span class='number'>1</span>, <span class='number'>1</span>];
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(
                ((<span class='number'>1</span> <span class='op'>&lt;&lt;</span> <span class='number'>24</span>) <span class='op'>-</span> <span class='number'>1</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span> <span class='op'>+</span> (<span class='number'>1</span> <span class='op'>&lt;&lt;</span> <span class='number'>8</span>) <span class='op'>+</span> (<span class='number'>1</span> <span class='op'>&lt;&lt;</span> <span class='number'>16</span>) <span class='op'>+</span> (<span class='number'>1</span> <span class='op'>&lt;&lt;</span> <span class='number'>24</span>)),
                <span class='ident'>unpack_header</span>(<span class='kw-2'>&amp;</span><span class='ident'>header</span>));
        }
    }

    <span class='doccomment'>/// Tests that the `pack_header` function correctly returns the buffer</span>
    <span class='doccomment'>/// corresponding to components of HTTP/2 frame headers.</span>
    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_pack_header</span>() {
        {
            <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>0</span>; <span class='number'>9</span>];
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&amp;</span>(<span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>)), <span class='ident'>header</span>);
        }
        {
            <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>, <span class='number'>2</span>, <span class='number'>3</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>4</span>];
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&amp;</span>(<span class='number'>1</span>, <span class='number'>2</span>, <span class='number'>3</span>, <span class='number'>4</span>)), <span class='ident'>header</span>);
        }
        {
            <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>, <span class='number'>200</span>, <span class='number'>100</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>4</span>];
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&amp;</span>(<span class='number'>1</span>, <span class='number'>200</span>, <span class='number'>100</span>, <span class='number'>4</span>)), <span class='ident'>header</span>);
        }
        {
            <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>];
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&amp;</span>(<span class='number'>1</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>)), <span class='ident'>header</span>);
        }
        {
            <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>0</span>, <span class='number'>1</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>];
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&amp;</span>(<span class='number'>256</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>)), <span class='ident'>header</span>);
        }
        {
            <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>1</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>];
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&amp;</span>(<span class='number'>256</span> <span class='op'>*</span> <span class='number'>256</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>)), <span class='ident'>header</span>);
        }
        {
            <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>];
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&amp;</span>(<span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>)), <span class='ident'>header</span>);
        }
        {
            <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>0xFF</span>, <span class='number'>0xFF</span>, <span class='number'>0xFF</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>];
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&amp;</span>((<span class='number'>1</span> <span class='op'>&lt;&lt;</span> <span class='number'>24</span>) <span class='op'>-</span> <span class='number'>1</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>)), <span class='ident'>header</span>);
        }
        {
            <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> [<span class='number'>0xFF</span>, <span class='number'>0xFF</span>, <span class='number'>0xFF</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span>, <span class='number'>1</span>, <span class='number'>1</span>, <span class='number'>1</span>];
            <span class='kw'>let</span> <span class='ident'>header_components</span> <span class='op'>=</span> (
                (<span class='number'>1</span> <span class='op'>&lt;&lt;</span> <span class='number'>24</span>) <span class='op'>-</span> <span class='number'>1</span>, <span class='number'>0</span>, <span class='number'>0</span>, <span class='number'>1</span> <span class='op'>+</span> (<span class='number'>1</span> <span class='op'>&lt;&lt;</span> <span class='number'>8</span>) <span class='op'>+</span> (<span class='number'>1</span> <span class='op'>&lt;&lt;</span> <span class='number'>16</span>) <span class='op'>+</span> (<span class='number'>1</span> <span class='op'>&lt;&lt;</span> <span class='number'>24</span>)
            );
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&amp;</span><span class='ident'>header_components</span>), <span class='ident'>header</span>);
        }
    }

    <span class='doccomment'>/// Builds a test frame of the given type with the given header and</span>
    <span class='doccomment'>/// payload, by using the `Frame::from_raw` method.</span>
    <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>build_test_frame</span><span class='op'>&lt;</span><span class='ident'>F</span>: <span class='ident'>Frame</span><span class='op'>&gt;</span>(<span class='ident'>header</span>: <span class='kw-2'>&amp;</span><span class='ident'>FrameHeader</span>, <span class='ident'>payload</span>: <span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>]) <span class='op'>-&gt;</span> <span class='ident'>F</span> {
        <span class='kw'>let</span> <span class='ident'>raw</span> <span class='op'>=</span> <span class='ident'>RawFrame</span>::<span class='ident'>with_payload</span>(<span class='ident'>header</span>.<span class='ident'>clone</span>(), <span class='ident'>payload</span>.<span class='ident'>to_vec</span>());
        <span class='ident'>Frame</span>::<span class='ident'>from_raw</span>(<span class='ident'>raw</span>).<span class='ident'>unwrap</span>()
    }

    <span class='doccomment'>/// Builds a `Vec` containing the given data as a padded HTTP/2 frame.</span>
    <span class='doccomment'>///</span>
    <span class='doccomment'>/// It first places the length of the padding, followed by the data,</span>
    <span class='doccomment'>/// followed by `pad_len` zero bytes.</span>
    <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>build_padded_frame_payload</span>(<span class='ident'>data</span>: <span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>], <span class='ident'>pad_len</span>: <span class='ident'>u8</span>) <span class='op'>-&gt;</span> <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span> {
        <span class='kw'>let</span> <span class='ident'>sz</span> <span class='op'>=</span> <span class='number'>1</span> <span class='op'>+</span> <span class='ident'>data</span>.<span class='ident'>len</span>() <span class='op'>+</span> <span class='ident'>pad_len</span> <span class='kw'>as</span> <span class='ident'>usize</span>;
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>payload</span>: <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>with_capacity</span>(<span class='ident'>sz</span>);
        <span class='ident'>payload</span>.<span class='ident'>push</span>(<span class='ident'>pad_len</span>);
        <span class='ident'>payload</span>.<span class='ident'>extend</span>(<span class='ident'>data</span>.<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>());
        <span class='kw'>for</span> _ <span class='kw'>in</span> <span class='number'>0</span>..<span class='ident'>pad_len</span> { <span class='ident'>payload</span>.<span class='ident'>push</span>(<span class='number'>0</span>); }

        <span class='ident'>payload</span>
    }

    <span class='doccomment'>/// Tests that the `RawFrame::with_payload` method correctly constructs a</span>
    <span class='doccomment'>/// `RawFrame` from the given parts.</span>
    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_raw_frame_with_payload</span>() {
        <span class='comment'>// Correct frame</span>
        {
            <span class='kw'>let</span> <span class='ident'>data</span> <span class='op'>=</span> <span class='string'>b&quot;123&quot;</span>;
            <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='ident'>data</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u32</span>, <span class='number'>0x1</span>, <span class='number'>0</span>, <span class='number'>1</span>);

            <span class='kw'>let</span> <span class='ident'>raw</span> <span class='op'>=</span> <span class='ident'>RawFrame</span>::<span class='ident'>with_payload</span>(<span class='ident'>header</span>, <span class='ident'>data</span>.<span class='ident'>to_vec</span>());

            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>header</span>(), <span class='ident'>header</span>);
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>payload</span>(), <span class='ident'>data</span>)
        }
        <span class='comment'>// Correct frame with trailing data</span>
        {
            <span class='kw'>let</span> <span class='ident'>data</span> <span class='op'>=</span> <span class='string'>b&quot;123456&quot;</span>;
            <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='number'>3</span>, <span class='number'>0x1</span>, <span class='number'>0</span>, <span class='number'>1</span>);

            <span class='kw'>let</span> <span class='ident'>raw</span> <span class='op'>=</span> <span class='ident'>RawFrame</span>::<span class='ident'>with_payload</span>(<span class='ident'>header</span>, <span class='ident'>data</span>.<span class='ident'>to_vec</span>());

            <span class='comment'>// No validation of whether the parts form a correct frame</span>
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>header</span>(), <span class='ident'>header</span>);
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>payload</span>(), <span class='ident'>data</span>)
        }
        <span class='comment'>// Missing payload chunk</span>
        {
            <span class='kw'>let</span> <span class='ident'>data</span> <span class='op'>=</span> <span class='string'>b&quot;123&quot;</span>;
            <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='number'>6</span>, <span class='number'>0x1</span>, <span class='number'>0</span>, <span class='number'>1</span>);

            <span class='kw'>let</span> <span class='ident'>raw</span> <span class='op'>=</span> <span class='ident'>RawFrame</span>::<span class='ident'>with_payload</span>(<span class='ident'>header</span>, <span class='ident'>data</span>.<span class='ident'>to_vec</span>());

            <span class='comment'>// No validation of whether the parts form a correct frame</span>
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>header</span>(), <span class='ident'>header</span>);
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>payload</span>(), <span class='ident'>data</span>)
        }
    }

    <span class='doccomment'>/// Tests that the `RawFrame::from_buf` method correctly constructs a</span>
    <span class='doccomment'>/// `RawFrame` from a given buffer.</span>
    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_raw_frame_from_buffer</span>() {
        <span class='comment'>// Correct frame</span>
        {
            <span class='kw'>let</span> <span class='ident'>data</span> <span class='op'>=</span> <span class='string'>b&quot;123&quot;</span>;
            <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='ident'>data</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u32</span>, <span class='number'>0x1</span>, <span class='number'>0</span>, <span class='number'>1</span>);
            <span class='kw'>let</span> <span class='ident'>buf</span> <span class='op'>=</span> {
                <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>buf</span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>new</span>();
                <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&amp;</span><span class='ident'>header</span>).<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>());
                <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>data</span>.<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>());
                <span class='ident'>buf</span>
            };

            <span class='kw'>let</span> <span class='ident'>raw</span> <span class='op'>=</span> <span class='ident'>RawFrame</span>::<span class='ident'>from_buf</span>(<span class='kw-2'>&amp;</span><span class='ident'>buf</span>).<span class='ident'>unwrap</span>();

            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>header</span>(), <span class='ident'>header</span>);
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>payload</span>(), <span class='ident'>data</span>)
        }
        <span class='comment'>// Correct frame with trailing data</span>
        {
            <span class='kw'>let</span> <span class='ident'>data</span> <span class='op'>=</span> <span class='string'>b&quot;123&quot;</span>;
            <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='ident'>data</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u32</span>, <span class='number'>0x1</span>, <span class='number'>0</span>, <span class='number'>1</span>);
            <span class='kw'>let</span> <span class='ident'>buf</span> <span class='op'>=</span> {
                <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>buf</span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>new</span>();
                <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&amp;</span><span class='ident'>header</span>).<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>());
                <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>data</span>.<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>());
                <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='macro'>vec</span><span class='macro'>!</span>[<span class='number'>1</span>, <span class='number'>2</span>, <span class='number'>3</span>, <span class='number'>4</span>, <span class='number'>5</span>].<span class='ident'>into_iter</span>());
                <span class='ident'>buf</span>
            };

            <span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>RawFrame</span>::<span class='ident'>from_buf</span>(<span class='kw-2'>&amp;</span><span class='ident'>buf</span>).<span class='ident'>is_none</span>());
        }
        <span class='comment'>// Missing payload chunk</span>
        {
            <span class='kw'>let</span> <span class='ident'>data</span> <span class='op'>=</span> <span class='string'>b&quot;123&quot;</span>;
            <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='ident'>data</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u32</span>, <span class='number'>0x1</span>, <span class='number'>0</span>, <span class='number'>1</span>);
            <span class='kw'>let</span> <span class='ident'>buf</span> <span class='op'>=</span> {
                <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>buf</span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>new</span>();
                <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&amp;</span><span class='ident'>header</span>).<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>());
                <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>data</span>[..<span class='number'>2</span>].<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>());
                <span class='ident'>buf</span>
            };

            <span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>RawFrame</span>::<span class='ident'>from_buf</span>(<span class='kw-2'>&amp;</span><span class='ident'>buf</span>).<span class='ident'>is_none</span>());
        }
        <span class='comment'>// Missing header chunk</span>
        {
            <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='number'>0</span>, <span class='number'>0x1</span>, <span class='number'>0</span>, <span class='number'>1</span>);
            <span class='kw'>let</span> <span class='ident'>buf</span> <span class='op'>=</span> {
                <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>buf</span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>new</span>();
                <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&amp;</span><span class='ident'>header</span>)[..<span class='number'>5</span>].<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>());
                <span class='ident'>buf</span>
            };

            <span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>RawFrame</span>::<span class='ident'>from_buf</span>(<span class='kw-2'>&amp;</span><span class='ident'>buf</span>).<span class='ident'>is_none</span>());
        }
        <span class='comment'>// Completely empty buffer</span>
        {
            <span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>RawFrame</span>::<span class='ident'>from_buf</span>(<span class='kw-2'>&amp;</span>[]).<span class='ident'>is_none</span>());
        }
    }

    <span class='doccomment'>/// Tests that constructing a `RawFrame` from a `Vec&lt;u8&gt;` by using the `From&lt;Vec&lt;u8&gt;&gt;`</span>
    <span class='doccomment'>/// trait implementation works as expected.</span>
    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_raw_frame_from_vec_buffer_unchecked</span>() {
        <span class='comment'>// Correct frame</span>
        {
            <span class='kw'>let</span> <span class='ident'>data</span> <span class='op'>=</span> <span class='string'>b&quot;123&quot;</span>;
            <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='ident'>data</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u32</span>, <span class='number'>0x1</span>, <span class='number'>0</span>, <span class='number'>1</span>);
            <span class='kw'>let</span> <span class='ident'>buf</span> <span class='op'>=</span> {
                <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>buf</span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>new</span>();
                <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&amp;</span><span class='ident'>header</span>).<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>());
                <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>data</span>.<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>());
                <span class='ident'>buf</span>
            };
            <span class='kw'>let</span> <span class='ident'>buf_clone</span> <span class='op'>=</span> <span class='ident'>buf</span>.<span class='ident'>clone</span>();

            <span class='kw'>let</span> <span class='ident'>raw</span> <span class='op'>=</span> <span class='ident'>RawFrame</span>::<span class='ident'>from</span>(<span class='ident'>buf</span>);

            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>header</span>(), <span class='ident'>header</span>);
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>payload</span>(), <span class='ident'>data</span>);
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>serialize</span>(), <span class='ident'>buf_clone</span>);
        }
        <span class='comment'>// Correct frame with trailing data</span>
        {
            <span class='kw'>let</span> <span class='ident'>data</span> <span class='op'>=</span> <span class='string'>b&quot;123&quot;</span>;
            <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='ident'>data</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u32</span>, <span class='number'>0x1</span>, <span class='number'>0</span>, <span class='number'>1</span>);
            <span class='kw'>let</span> <span class='ident'>buf</span> <span class='op'>=</span> {
                <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>buf</span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>new</span>();
                <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&amp;</span><span class='ident'>header</span>).<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>());
                <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>data</span>.<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>());
                <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='string'>b&quot;12345&quot;</span>.<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>());
                <span class='ident'>buf</span>
            };
            <span class='kw'>let</span> <span class='ident'>buf_clone</span> <span class='op'>=</span> <span class='ident'>buf</span>.<span class='ident'>clone</span>();

            <span class='kw'>let</span> <span class='ident'>raw</span> <span class='op'>=</span> <span class='ident'>RawFrame</span>::<span class='ident'>from</span>(<span class='ident'>buf</span>);

            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>header</span>(), <span class='ident'>header</span>);
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>payload</span>(), <span class='string'>b&quot;12312345&quot;</span>);
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>serialize</span>(), <span class='ident'>buf_clone</span>);
        }
        <span class='comment'>// Missing payload chunk</span>
        {
            <span class='kw'>let</span> <span class='ident'>data</span> <span class='op'>=</span> <span class='string'>b&quot;123&quot;</span>;
            <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='ident'>data</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u32</span>, <span class='number'>0x1</span>, <span class='number'>0</span>, <span class='number'>1</span>);
            <span class='kw'>let</span> <span class='ident'>buf</span> <span class='op'>=</span> {
                <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>buf</span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>new</span>();
                <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&amp;</span><span class='ident'>header</span>).<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>());
                <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>data</span>[..<span class='number'>2</span>].<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>());
                <span class='ident'>buf</span>
            };
            <span class='kw'>let</span> <span class='ident'>buf_clone</span> <span class='op'>=</span> <span class='ident'>buf</span>.<span class='ident'>clone</span>();

            <span class='kw'>let</span> <span class='ident'>raw</span> <span class='op'>=</span> <span class='ident'>RawFrame</span>::<span class='ident'>from</span>(<span class='ident'>buf</span>);

            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>header</span>(), <span class='ident'>header</span>);
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>payload</span>(), <span class='string'>b&quot;12&quot;</span>);
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>serialize</span>(), <span class='ident'>buf_clone</span>);
        }
        <span class='comment'>// Missing header chunk</span>
        {
            <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='number'>0</span>, <span class='number'>0x1</span>, <span class='number'>0</span>, <span class='number'>1</span>);
            <span class='kw'>let</span> <span class='ident'>buf</span> <span class='op'>=</span> {
                <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>buf</span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>new</span>();
                <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&amp;</span><span class='ident'>header</span>)[..<span class='number'>5</span>].<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>());
                <span class='ident'>buf</span>
            };
            <span class='kw'>let</span> <span class='ident'>buf_clone</span> <span class='op'>=</span> <span class='ident'>buf</span>.<span class='ident'>clone</span>();

            <span class='kw'>let</span> <span class='ident'>raw</span> <span class='op'>=</span> <span class='ident'>RawFrame</span>::<span class='ident'>from</span>(<span class='ident'>buf</span>);

            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>serialize</span>(), <span class='ident'>buf_clone</span>);
        }
        <span class='comment'>// Completely empty buffer</span>
        {
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>RawFrame</span>::<span class='ident'>from</span>(<span class='macro'>vec</span><span class='macro'>!</span>[]).<span class='ident'>serialize</span>(), <span class='kw-2'>&amp;</span>[]);
        }
    }

    <span class='doccomment'>/// Tests that the `RawFrame::serialize` method correctly serializes a</span>
    <span class='doccomment'>/// `RawFrame`.</span>
    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_raw_frame_serialize</span>() {
        <span class='kw'>let</span> <span class='ident'>data</span> <span class='op'>=</span> <span class='string'>b&quot;123&quot;</span>;
        <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='ident'>data</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u32</span>, <span class='number'>0x1</span>, <span class='number'>0</span>, <span class='number'>1</span>);
        <span class='kw'>let</span> <span class='ident'>buf</span> <span class='op'>=</span> {
            <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>buf</span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>new</span>();
            <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&amp;</span><span class='ident'>header</span>).<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>());
            <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>data</span>.<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>());
            <span class='ident'>buf</span>
        };
        <span class='kw'>let</span> <span class='ident'>raw</span> <span class='op'>=</span> <span class='ident'>RawFrame</span>::<span class='ident'>from_buf</span>(<span class='kw-2'>&amp;</span><span class='ident'>buf</span>).<span class='ident'>unwrap</span>();

        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>raw</span>.<span class='ident'>serialize</span>(), <span class='ident'>buf</span>);
    }

    <span class='doccomment'>/// Tests that converting a `RawFrame` into a `Vec` works correctly.</span>
    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_raw_frame_into_vec</span>() {
        <span class='kw'>let</span> <span class='ident'>data</span> <span class='op'>=</span> <span class='string'>b&quot;123&quot;</span>;
        <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='ident'>data</span>.<span class='ident'>len</span>() <span class='kw'>as</span> <span class='ident'>u32</span>, <span class='number'>0x1</span>, <span class='number'>0</span>, <span class='number'>1</span>);
        <span class='kw'>let</span> <span class='ident'>buf</span> <span class='op'>=</span> {
            <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>buf</span> <span class='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>new</span>();
            <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>pack_header</span>(<span class='kw-2'>&amp;</span><span class='ident'>header</span>).<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>());
            <span class='ident'>buf</span>.<span class='ident'>extend</span>(<span class='ident'>data</span>.<span class='ident'>to_vec</span>().<span class='ident'>into_iter</span>());
            <span class='ident'>buf</span>
        };
        <span class='kw'>let</span> <span class='ident'>raw</span> <span class='op'>=</span> <span class='ident'>RawFrame</span>::<span class='ident'>from_buf</span>(<span class='kw-2'>&amp;</span><span class='ident'>buf</span>).<span class='ident'>unwrap</span>();

        <span class='kw'>let</span> <span class='ident'>serialized</span> <span class='op'>=</span> <span class='ident'>raw</span>.<span class='ident'>serialize</span>();
        <span class='kw'>let</span> <span class='ident'>vec</span>: <span class='ident'>Vec</span><span class='op'>&lt;</span>_<span class='op'>&gt;</span> <span class='op'>=</span> <span class='ident'>raw</span>.<span class='ident'>into</span>();
        <span class='comment'>// The vector is equivalent to the original buffer?</span>
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>vec</span>, <span class='ident'>buf</span>);
        <span class='comment'>// The vector and the serialized representation are also equivalent</span>
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>vec</span>, <span class='ident'>serialized</span>);
    }
}
</pre>
</section>
    <section id='search' class="content hidden"></section>

    <section class="footer"></section>

    <aside id="help" class="hidden">
        <div>
            <h1 class="hidden">Help</h1>

            <div class="shortcuts">
                <h2>Keyboard Shortcuts</h2>

                <dl>
                    <dt>?</dt>
                    <dd>Show this help dialog</dd>
                    <dt>S</dt>
                    <dd>Focus the search field</dd>
                    <dt>&larrb;</dt>
                    <dd>Move up in search results</dd>
                    <dt>&rarrb;</dt>
                    <dd>Move down in search results</dd>
                    <dt>&#9166;</dt>
                    <dd>Go to active search result</dd>
                    <dt>+</dt>
                    <dd>Collapse/expand all sections</dd>
                </dl>
            </div>

            <div class="infos">
                <h2>Search Tricks</h2>

                <p>
                    Prefix searches with a type followed by a colon (e.g.
                    <code>fn:</code>) to restrict the search to a given type.
                </p>

                <p>
                    Accepted types are: <code>fn</code>, <code>mod</code>,
                    <code>struct</code>, <code>enum</code>,
                    <code>trait</code>, <code>type</code>, <code>macro</code>,
                    and <code>const</code>.
                </p>

                <p>
                    Search functions by type signature (e.g.
                    <code>vec -> usize</code> or <code>* -> vec</code>)
                </p>
            </div>
        </div>
    </aside>

    

    <script>
        window.rootPath = "../../../../";
        window.currentCrate = "solicit";
        window.playgroundUrl = "";
    </script>
    <script src="../../../../jquery.js"></script>
    <script src="../../../../main.js"></script>
    
    <script defer src="../../../../search-index.js"></script>
</body>
</html>