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</pre><pre class='rust '>
<span class='doccomment'>//! A module implementing HPACK functionality. Exposes a simple API for</span>
<span class='doccomment'>//! performing the encoding and decoding of header sets, according to the</span>
<span class='doccomment'>//! HPACK spec.</span>

<span class='attribute'>#[<span class='ident'>macro_use</span>]</span> <span class='kw'>extern</span> <span class='kw'>crate</span> <span class='ident'>log</span>;
<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>feature</span><span class='op'>=</span><span class='string'>&quot;interop_tests&quot;</span>)]</span>
<span class='kw'>extern</span> <span class='kw'>crate</span> <span class='ident'>rustc_serialize</span>;

<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>fmt</span>;
<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>iter</span>;
<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>slice</span>;
<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>collections</span>::<span class='ident'>VecDeque</span>;
<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>collections</span>::<span class='ident'>vec_deque</span>;

<span class='comment'>// Re-export the main HPACK API entry points.</span>
<span class='kw'>pub</span> <span class='kw'>use</span> <span class='self'>self</span>::<span class='ident'>decoder</span>::<span class='ident'>Decoder</span>;
<span class='kw'>pub</span> <span class='kw'>use</span> <span class='self'>self</span>::<span class='ident'>encoder</span>::<span class='ident'>Encoder</span>;

<span class='kw'>pub</span> <span class='kw'>mod</span> <span class='ident'>encoder</span>;
<span class='kw'>pub</span> <span class='kw'>mod</span> <span class='ident'>decoder</span>;
<span class='kw'>pub</span> <span class='kw'>mod</span> <span class='ident'>huffman</span>;

<span class='doccomment'>/// An `Iterator` through elements of the `DynamicTable`.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// The implementation of the iterator itself is very tightly coupled</span>
<span class='doccomment'>/// to the implementation of the `DynamicTable`.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// This iterator returns tuples of slices. The tuples themselves are</span>
<span class='doccomment'>/// constructed as new instances, containing a borrow from the `Vec`s</span>
<span class='doccomment'>/// representing the underlying Headers.</span>
<span class='kw'>struct</span> <span class='ident'>DynamicTableIter</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span><span class='op'>&gt;</span> {
    <span class='doccomment'>/// Stores an iterator through the underlying structure that the</span>
    <span class='doccomment'>/// `DynamicTable` uses</span>
    <span class='ident'>inner</span>: <span class='ident'>vec_deque</span>::<span class='ident'>Iter</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span>, (<span class='ident'>Vec</span><span class='op'>&lt;</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='op'>&gt;</span>,
}

<span class='kw'>impl</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span><span class='op'>&gt;</span> <span class='ident'>Iterator</span> <span class='kw'>for</span> <span class='ident'>DynamicTableIter</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span><span class='op'>&gt;</span> {
    <span class='kw'>type</span> <span class='ident'>Item</span> <span class='op'>=</span> (<span class='kw-2'>&amp;</span><span class='lifetime'>&#39;a</span> [<span class='ident'>u8</span>], <span class='kw-2'>&amp;</span><span class='lifetime'>&#39;a</span> [<span class='ident'>u8</span>]);

    <span class='kw'>fn</span> <span class='ident'>next</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</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='kw-2'>&amp;</span><span class='lifetime'>&#39;a</span> [<span class='ident'>u8</span>])<span class='op'>&gt;</span> {
        <span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>inner</span>.<span class='ident'>next</span>() {
            <span class='prelude-val'>Some</span>(<span class='kw-2'>ref</span> <span class='ident'>header</span>) <span class='op'>=&gt;</span> <span class='prelude-val'>Some</span>((<span class='kw-2'>&amp;</span><span class='ident'>header</span>.<span class='number'>0</span>, <span class='kw-2'>&amp;</span><span class='ident'>header</span>.<span class='number'>1</span>)),
            <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> <span class='prelude-val'>None</span>,
        }
    }
}

<span class='doccomment'>/// A struct representing the dynamic table that needs to be maintained by the</span>
<span class='doccomment'>/// coder.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// The dynamic table contains a number of recently used headers. The size of</span>
<span class='doccomment'>/// the table is constrained to a certain number of octets. If on insertion of</span>
<span class='doccomment'>/// a new header into the table, the table would exceed the maximum size,</span>
<span class='doccomment'>/// headers are evicted in a FIFO fashion until there is enough room for the</span>
<span class='doccomment'>/// new header to be inserted. (Therefore, it is possible that though all</span>
<span class='doccomment'>/// elements end up being evicted, there is still not enough space for the new</span>
<span class='doccomment'>/// header: when the size of this individual header exceeds the maximum size of</span>
<span class='doccomment'>/// the table.)</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// The current size of the table is calculated, based on the IETF definition,</span>
<span class='doccomment'>/// as the sum of sizes of each header stored within the table, where the size</span>
<span class='doccomment'>/// of an individual header is</span>
<span class='doccomment'>/// `len_in_octets(header_name) + len_in_octets(header_value) + 32`.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// Note: the maximum size of the dynamic table does not have to be equal to</span>
<span class='doccomment'>/// the maximum header table size as defined by a &quot;higher level&quot; protocol</span>
<span class='doccomment'>/// (such as the `SETTINGS_HEADER_TABLE_SIZE` setting in HTTP/2), since HPACK</span>
<span class='doccomment'>/// can choose to modify the dynamic table size on the fly (as long as it keeps</span>
<span class='doccomment'>/// it below the maximum value set by the protocol). So, the `DynamicTable`</span>
<span class='doccomment'>/// only cares about the maximum size as set by the HPACK {en,de}coder and lets</span>
<span class='doccomment'>/// *it* worry about making certain that the changes are valid according to</span>
<span class='doccomment'>/// the (current) constraints of the protocol.</span>
<span class='kw'>struct</span> <span class='ident'>DynamicTable</span> {
    <span class='ident'>table</span>: <span class='ident'>VecDeque</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;</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'>size</span>: <span class='ident'>usize</span>,
    <span class='ident'>max_size</span>: <span class='ident'>usize</span>,
}

<span class='kw'>impl</span> <span class='ident'>DynamicTable</span> {
    <span class='doccomment'>/// Creates a new empty dynamic table with a default size.</span>
    <span class='kw'>fn</span> <span class='ident'>new</span>() <span class='op'>-&gt;</span> <span class='ident'>DynamicTable</span> {
        <span class='comment'>// The default maximum size corresponds to the default HTTP/2</span>
        <span class='comment'>// setting</span>
        <span class='ident'>DynamicTable</span>::<span class='ident'>with_size</span>(<span class='number'>4096</span>)
    }

    <span class='doccomment'>/// Creates a new empty dynamic table with the given maximum size.</span>
    <span class='kw'>fn</span> <span class='ident'>with_size</span>(<span class='ident'>max_size</span>: <span class='ident'>usize</span>) <span class='op'>-&gt;</span> <span class='ident'>DynamicTable</span> {
        <span class='ident'>DynamicTable</span> {
            <span class='ident'>table</span>: <span class='ident'>VecDeque</span>::<span class='ident'>new</span>(),
            <span class='ident'>size</span>: <span class='number'>0</span>,
            <span class='ident'>max_size</span>: <span class='ident'>max_size</span>,
        }
    }

    <span class='doccomment'>/// Returns the current size of the table in octets, as defined by the IETF</span>
    <span class='doccomment'>/// HPACK spec.</span>
    <span class='kw'>fn</span> <span class='ident'>get_size</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='ident'>usize</span> {
        <span class='self'>self</span>.<span class='ident'>size</span>
    }

    <span class='doccomment'>/// Returns an `Iterator` through the headers stored in the `DynamicTable`.</span>
    <span class='doccomment'>///</span>
    <span class='doccomment'>/// The iterator will yield elements of type `(&amp;[u8], &amp;[u8])`,</span>
    <span class='doccomment'>/// corresponding to a single header name and value. The name and value</span>
    <span class='doccomment'>/// slices are borrowed from their representations in the `DynamicTable`</span>
    <span class='doccomment'>/// internal implementation, which means that it is possible only to</span>
    <span class='doccomment'>/// iterate through the headers, not mutate them.</span>
    <span class='kw'>fn</span> <span class='ident'>iter</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='ident'>DynamicTableIter</span> {
        <span class='ident'>DynamicTableIter</span> {
            <span class='ident'>inner</span>: <span class='self'>self</span>.<span class='ident'>table</span>.<span class='ident'>iter</span>(),
        }
    }

    <span class='doccomment'>/// Sets the new maximum table size.</span>
    <span class='doccomment'>///</span>
    <span class='doccomment'>/// If the current size of the table is larger than the new maximum size,</span>
    <span class='doccomment'>/// existing headers are evicted in a FIFO fashion until the size drops</span>
    <span class='doccomment'>/// below the new maximum.</span>
    <span class='kw'>fn</span> <span class='ident'>set_max_table_size</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>new_max_size</span>: <span class='ident'>usize</span>) {
        <span class='self'>self</span>.<span class='ident'>max_size</span> <span class='op'>=</span> <span class='ident'>new_max_size</span>;
        <span class='comment'>// Make the table size fit within the new constraints.</span>
        <span class='self'>self</span>.<span class='ident'>consolidate_table</span>();
    }

    <span class='doccomment'>/// Returns the maximum size of the table in octets.</span>
    <span class='kw'>fn</span> <span class='ident'>get_max_table_size</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='ident'>usize</span> {
        <span class='self'>self</span>.<span class='ident'>max_size</span>
    }

    <span class='doccomment'>/// Add a new header to the dynamic table.</span>
    <span class='doccomment'>///</span>
    <span class='doccomment'>/// The table automatically gets resized, if necessary.</span>
    <span class='doccomment'>///</span>
    <span class='doccomment'>/// Do note that, under the HPACK rules, it is possible the given header</span>
    <span class='doccomment'>/// is not found in the dynamic table after this operation finishes, in</span>
    <span class='doccomment'>/// case the total size of the given header exceeds the maximum size of the</span>
    <span class='doccomment'>/// dynamic table.</span>
    <span class='kw'>fn</span> <span class='ident'>add_header</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>name</span>: <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>, <span class='ident'>value</span>: <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>) {
        <span class='comment'>// This is how the HPACK spec makes us calculate the size.  The 32 is</span>
        <span class='comment'>// a magic number determined by them (under reasonable assumptions of</span>
        <span class='comment'>// how the table is stored).</span>
        <span class='self'>self</span>.<span class='ident'>size</span> <span class='op'>+=</span> <span class='ident'>name</span>.<span class='ident'>len</span>() <span class='op'>+</span> <span class='ident'>value</span>.<span class='ident'>len</span>() <span class='op'>+</span> <span class='number'>32</span>;
        <span class='macro'>debug</span><span class='macro'>!</span>(<span class='string'>&quot;New dynamic table size {}&quot;</span>, <span class='self'>self</span>.<span class='ident'>size</span>);
        <span class='comment'>// Now add it to the internal buffer</span>
        <span class='self'>self</span>.<span class='ident'>table</span>.<span class='ident'>push_front</span>((<span class='ident'>name</span>, <span class='ident'>value</span>));
        <span class='comment'>// ...and make sure we&#39;re not over the maximum size.</span>
        <span class='self'>self</span>.<span class='ident'>consolidate_table</span>();
        <span class='macro'>debug</span><span class='macro'>!</span>(<span class='string'>&quot;After consolidation dynamic table size {}&quot;</span>, <span class='self'>self</span>.<span class='ident'>size</span>);
    }

    <span class='doccomment'>/// Consolidates the table entries so that the table size is below the</span>
    <span class='doccomment'>/// maximum allowed size, by evicting headers from the table in a FIFO</span>
    <span class='doccomment'>/// fashion.</span>
    <span class='kw'>fn</span> <span class='ident'>consolidate_table</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>) {
        <span class='kw'>while</span> <span class='self'>self</span>.<span class='ident'>size</span> <span class='op'>&gt;</span> <span class='self'>self</span>.<span class='ident'>max_size</span> {
            {
                <span class='kw'>let</span> <span class='ident'>last_header</span> <span class='op'>=</span> <span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>table</span>.<span class='ident'>back</span>() {
                    <span class='prelude-val'>Some</span>(<span class='ident'>x</span>) <span class='op'>=&gt;</span> <span class='ident'>x</span>,
                    <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> {
                        <span class='comment'>// Can never happen as the size of the table must reach</span>
                        <span class='comment'>// 0 by the time we&#39;ve exhausted all elements.</span>
                        <span class='macro'>panic</span><span class='macro'>!</span>(<span class='string'>&quot;Size of table != 0, but no headers left!&quot;</span>);
                    }
                };
                <span class='self'>self</span>.<span class='ident'>size</span> <span class='op'>-=</span> <span class='ident'>last_header</span>.<span class='number'>0</span>.<span class='ident'>len</span>() <span class='op'>+</span> <span class='ident'>last_header</span>.<span class='number'>1</span>.<span class='ident'>len</span>() <span class='op'>+</span> <span class='number'>32</span>;
            }
            <span class='self'>self</span>.<span class='ident'>table</span>.<span class='ident'>pop_back</span>();
        }
    }

    <span class='doccomment'>/// Returns the number of headers in the dynamic table.</span>
    <span class='doccomment'>///</span>
    <span class='doccomment'>/// This is different than the size of the dynamic table.</span>
    <span class='kw'>fn</span> <span class='ident'>len</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='ident'>usize</span> {
        <span class='self'>self</span>.<span class='ident'>table</span>.<span class='ident'>len</span>()
    }

    <span class='doccomment'>/// Converts the current state of the table to a `Vec`</span>
    <span class='kw'>fn</span> <span class='ident'>to_vec</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'>Vec</span><span class='op'>&lt;</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='op'>&gt;</span> {
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>ret</span>: <span class='ident'>Vec</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;</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='op'>=</span> <span class='ident'>Vec</span>::<span class='ident'>new</span>();
        <span class='kw'>for</span> <span class='ident'>elem</span> <span class='kw'>in</span> <span class='self'>self</span>.<span class='ident'>table</span>.<span class='ident'>iter</span>() {
            <span class='ident'>ret</span>.<span class='ident'>push</span>(<span class='ident'>elem</span>.<span class='ident'>clone</span>());
        }

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

    <span class='doccomment'>/// Returns a reference to the header at the given index, if found in the</span>
    <span class='doccomment'>/// dynamic table.</span>
    <span class='kw'>fn</span> <span class='ident'>get</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>, <span class='ident'>index</span>: <span class='ident'>usize</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='ident'>Vec</span><span class='op'>&lt;</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='op'>&gt;</span> {
        <span class='self'>self</span>.<span class='ident'>table</span>.<span class='ident'>get</span>(<span class='ident'>index</span>)
    }
}

<span class='kw'>impl</span> <span class='ident'>fmt</span>::<span class='ident'>Debug</span> <span class='kw'>for</span> <span class='ident'>DynamicTable</span> {
    <span class='kw'>fn</span> <span class='ident'>fmt</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>, <span class='ident'>formatter</span>: <span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='ident'>fmt</span>::<span class='ident'>Formatter</span>) <span class='op'>-&gt;</span> <span class='ident'>fmt</span>::<span class='prelude-ty'>Result</span> {
        <span class='macro'>write</span><span class='macro'>!</span>(<span class='ident'>formatter</span>, <span class='string'>&quot;{:?}&quot;</span>, <span class='self'>self</span>.<span class='ident'>table</span>)
    }
}

<span class='doccomment'>/// Represents the type of the static table, as defined by the HPACK spec.</span>
<span class='kw'>type</span> <span class='ident'>StaticTable</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span><span class='op'>&gt;</span> <span class='op'>=</span> <span class='kw-2'>&amp;</span><span class='lifetime'>&#39;a</span> [(<span class='kw-2'>&amp;</span><span class='lifetime'>&#39;a</span> [<span class='ident'>u8</span>], <span class='kw-2'>&amp;</span><span class='lifetime'>&#39;a</span> [<span class='ident'>u8</span>])];

<span class='doccomment'>/// Implements an iterator through the entire `HeaderTable`.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// Yields first the elements from the static table, followed by elements from</span>
<span class='doccomment'>/// the dynamic table, with each element being of type `(&amp;[u8], &amp;[u8])`.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// This struct is tightly coupled to the implementation of the `HeaderTable`,</span>
<span class='doccomment'>/// but its clients are shielded from all that and have a convenient (and</span>
<span class='doccomment'>/// standardized) interface to iterate through all headers of the table.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// The declaration of the inner iterator that is wrapped by this struct is a</span>
<span class='doccomment'>/// monstrosity, that is required because &quot;abstract return types&quot; don&#39;t exist</span>
<span class='doccomment'>/// yet ([https://github.com/rust-lang/rfcs/pull/105]).</span>
<span class='kw'>struct</span> <span class='ident'>HeaderTableIter</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span><span class='op'>&gt;</span> {
    <span class='comment'>// Represents a chain of static-table -&gt; dynamic-table elements.</span>
    <span class='comment'>// The mapper is required to transform the elements yielded from the static</span>
    <span class='comment'>// table to a type that matches the elements yielded from the dynamic table.</span>
    <span class='ident'>inner</span>: <span class='ident'>iter</span>::<span class='ident'>Chain</span><span class='op'>&lt;</span>
            <span class='ident'>iter</span>::<span class='ident'>Map</span><span class='op'>&lt;</span>
                <span class='ident'>slice</span>::<span class='ident'>Iter</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span>, (<span class='kw-2'>&amp;</span><span class='lifetime'>&#39;a</span> [<span class='ident'>u8</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='kw'>fn</span>((<span class='kw-2'>&amp;</span><span class='lifetime'>&#39;a</span> (<span class='kw-2'>&amp;</span><span class='lifetime'>&#39;a</span> [<span class='ident'>u8</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='kw-2'>&amp;</span><span class='lifetime'>&#39;a</span> [<span class='ident'>u8</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='ident'>DynamicTableIter</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span><span class='op'>&gt;&gt;</span>,
}

<span class='kw'>impl</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span><span class='op'>&gt;</span> <span class='ident'>Iterator</span> <span class='kw'>for</span> <span class='ident'>HeaderTableIter</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span><span class='op'>&gt;</span> {
    <span class='kw'>type</span> <span class='ident'>Item</span> <span class='op'>=</span> (<span class='kw-2'>&amp;</span><span class='lifetime'>&#39;a</span> [<span class='ident'>u8</span>], <span class='kw-2'>&amp;</span><span class='lifetime'>&#39;a</span> [<span class='ident'>u8</span>]);

    <span class='kw'>fn</span> <span class='ident'>next</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</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='kw-2'>&amp;</span><span class='lifetime'>&#39;a</span> [<span class='ident'>u8</span>])<span class='op'>&gt;</span> {
        <span class='comment'>// Simply delegates to the wrapped iterator that is constructed by the</span>
        <span class='comment'>// `HeaderTable` and passed into the `HeaderTableIter`.</span>
        <span class='self'>self</span>.<span class='ident'>inner</span>.<span class='ident'>next</span>()
    }
}

<span class='doccomment'>/// A helper function that maps a borrowed tuple containing two borrowed slices</span>
<span class='doccomment'>/// to just a tuple of two borrowed slices.</span>
<span class='doccomment'>///</span>
<span class='doccomment'>/// This helper function is needed because in order to define the type</span>
<span class='doccomment'>/// `HeaderTableIter` we need to be able to refer to a real type for the Fn</span>
<span class='doccomment'>/// template parameter, which means that when instantiating an instance, a</span>
<span class='doccomment'>/// closure cannot be passed, since it cannot be named.</span>
<span class='kw'>fn</span> <span class='ident'>static_table_mapper</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span><span class='op'>&gt;</span>(<span class='ident'>h</span>: <span class='kw-2'>&amp;</span><span class='lifetime'>&#39;a</span> (<span class='kw-2'>&amp;</span><span class='lifetime'>&#39;a</span> [<span class='ident'>u8</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='kw-2'>&amp;</span><span class='lifetime'>&#39;a</span> [<span class='ident'>u8</span>], <span class='kw-2'>&amp;</span><span class='lifetime'>&#39;a</span> [<span class='ident'>u8</span>]) {
    <span class='op'>*</span><span class='ident'>h</span>
}

<span class='doccomment'>/// The struct represents the header table obtained by merging the static and</span>
<span class='doccomment'>/// dynamic tables into a single index address space, as described in section</span>
<span class='doccomment'>/// `2.3.3.` of the HPACK spec.</span>
<span class='kw'>struct</span> <span class='ident'>HeaderTable</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span><span class='op'>&gt;</span> {
    <span class='ident'>static_table</span>: <span class='ident'>StaticTable</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span><span class='op'>&gt;</span>,
    <span class='ident'>dynamic_table</span>: <span class='ident'>DynamicTable</span>,
}

<span class='kw'>impl</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span><span class='op'>&gt;</span> <span class='ident'>HeaderTable</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span><span class='op'>&gt;</span> {
    <span class='doccomment'>/// Creates a new header table where the static part is initialized with</span>
    <span class='doccomment'>/// the given static table.</span>
    <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>with_static_table</span>(<span class='ident'>static_table</span>: <span class='ident'>StaticTable</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span><span class='op'>&gt;</span>) <span class='op'>-&gt;</span> <span class='ident'>HeaderTable</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span><span class='op'>&gt;</span> {
        <span class='ident'>HeaderTable</span> {
            <span class='ident'>static_table</span>: <span class='ident'>static_table</span>,
            <span class='ident'>dynamic_table</span>: <span class='ident'>DynamicTable</span>::<span class='ident'>new</span>(),
        }
    }

    <span class='doccomment'>/// Returns an iterator through *all* headers stored in the header table,</span>
    <span class='doccomment'>/// i.e. it includes both the ones found in the static table and the</span>
    <span class='doccomment'>/// dynamic table, in the order of their indices in the single address</span>
    <span class='doccomment'>/// space (first the headers in the static table, followed by headers in</span>
    <span class='doccomment'>/// the dynamic table).</span>
    <span class='doccomment'>///</span>
    <span class='doccomment'>/// The type yielded by the iterator is `(&amp;[u8], &amp;[u8])`, where the tuple</span>
    <span class='doccomment'>/// corresponds to the header name, value pairs in the described order.</span>
    <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>iter</span>(<span class='kw-2'>&amp;</span><span class='lifetime'>&#39;a</span> <span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='ident'>HeaderTableIter</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span><span class='op'>&gt;</span> {
        <span class='ident'>HeaderTableIter</span> {
            <span class='ident'>inner</span>: <span class='self'>self</span>.<span class='ident'>static_table</span>.<span class='ident'>iter</span>()
                                    .<span class='ident'>map</span>(<span class='ident'>static_table_mapper</span> <span class='kw'>as</span>
                                            <span class='kw'>fn</span>((<span class='kw-2'>&amp;</span><span class='lifetime'>&#39;a</span> (<span class='kw-2'>&amp;</span><span class='lifetime'>&#39;a</span> [<span class='ident'>u8</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='kw-2'>&amp;</span><span class='lifetime'>&#39;a</span> [<span class='ident'>u8</span>], <span class='kw-2'>&amp;</span><span class='lifetime'>&#39;a</span> [<span class='ident'>u8</span>]))
                                    .<span class='ident'>chain</span>(<span class='self'>self</span>.<span class='ident'>dynamic_table</span>.<span class='ident'>iter</span>()),
        }
    }

    <span class='doccomment'>/// Adds the given header to the table. Of course, this means that the new</span>
    <span class='doccomment'>/// header is added to the dynamic part of the table.</span>
    <span class='doccomment'>///</span>
    <span class='doccomment'>/// If the size of the new header is larger than the current maximum table</span>
    <span class='doccomment'>/// size of the dynamic table, the effect will be that the dynamic table</span>
    <span class='doccomment'>/// gets emptied and the new header does *not* get inserted into it.</span>
    <span class='attribute'>#[<span class='ident'>inline</span>]</span>
    <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>add_header</span>(<span class='kw-2'>&amp;</span><span class='kw-2'>mut</span> <span class='self'>self</span>, <span class='ident'>name</span>: <span class='ident'>Vec</span><span class='op'>&lt;</span><span class='ident'>u8</span><span class='op'>&gt;</span>, <span class='ident'>value</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'>dynamic_table</span>.<span class='ident'>add_header</span>(<span class='ident'>name</span>, <span class='ident'>value</span>);
    }

    <span class='doccomment'>/// Returns a reference to the header (a `(name, value)` pair) with the</span>
    <span class='doccomment'>/// given index in the table.</span>
    <span class='doccomment'>///</span>
    <span class='doccomment'>/// The table is 1-indexed and constructed in such a way that the first</span>
    <span class='doccomment'>/// entries belong to the static table, followed by entries in the dynamic</span>
    <span class='doccomment'>/// table. They are merged into a single index address space, though.</span>
    <span class='doccomment'>///</span>
    <span class='doccomment'>/// This is according to the [HPACK spec, section 2.3.3.]</span>
    <span class='doccomment'>/// (http://http2.github.io/http2-spec/compression.html#index.address.space)</span>
    <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>get_from_table</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>, <span class='ident'>index</span>: <span class='ident'>usize</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='ident'>u8</span>], <span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>])<span class='op'>&gt;</span> {
        <span class='comment'>// The IETF defined table indexing as 1-based.</span>
        <span class='comment'>// So, before starting, make sure the given index is within the proper</span>
        <span class='comment'>// bounds.</span>
        <span class='kw'>let</span> <span class='ident'>real_index</span> <span class='op'>=</span> <span class='kw'>if</span> <span class='ident'>index</span> <span class='op'>&gt;</span> <span class='number'>0</span> {
            <span class='ident'>index</span> <span class='op'>-</span> <span class='number'>1</span>
        } <span class='kw'>else</span> {
            <span class='kw'>return</span> <span class='prelude-val'>None</span>
        };

        <span class='kw'>if</span> <span class='ident'>real_index</span> <span class='op'>&lt;</span> <span class='self'>self</span>.<span class='ident'>static_table</span>.<span class='ident'>len</span>() {
            <span class='comment'>// It is in the static table so just return that...</span>
            <span class='prelude-val'>Some</span>(<span class='self'>self</span>.<span class='ident'>static_table</span>[<span class='ident'>real_index</span>])
        } <span class='kw'>else</span> {
            <span class='comment'>// Maybe it&#39;s in the dynamic table then?</span>
            <span class='kw'>let</span> <span class='ident'>dynamic_index</span> <span class='op'>=</span> <span class='ident'>real_index</span> <span class='op'>-</span> <span class='self'>self</span>.<span class='ident'>static_table</span>.<span class='ident'>len</span>();
            <span class='kw'>if</span> <span class='ident'>dynamic_index</span> <span class='op'>&lt;</span> <span class='self'>self</span>.<span class='ident'>dynamic_table</span>.<span class='ident'>len</span>() {
                <span class='kw'>match</span> <span class='self'>self</span>.<span class='ident'>dynamic_table</span>.<span class='ident'>get</span>(<span class='ident'>dynamic_index</span>) {
                    <span class='prelude-val'>Some</span>(<span class='kw-2'>&amp;</span>(<span class='kw-2'>ref</span> <span class='ident'>name</span>, <span class='kw-2'>ref</span> <span class='ident'>value</span>)) <span class='op'>=&gt;</span> {
                        <span class='prelude-val'>Some</span>((<span class='ident'>name</span>, <span class='ident'>value</span>))
                    },
                    <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> <span class='prelude-val'>None</span>
                }
            } <span class='kw'>else</span> {
                <span class='comment'>// Index out of bounds!</span>
                <span class='prelude-val'>None</span>
            }
        }
    }

    <span class='doccomment'>/// Finds the given header in the header table. Tries to match both the</span>
    <span class='doccomment'>/// header name and value to one of the headers in the table. If no such</span>
    <span class='doccomment'>/// header exists, then falls back to returning one that matched only the</span>
    <span class='doccomment'>/// name.</span>
    <span class='doccomment'>///</span>
    <span class='doccomment'>/// # Returns</span>
    <span class='doccomment'>///</span>
    <span class='doccomment'>/// An `Option`, where `Some` corresponds to a tuple representing the index</span>
    <span class='doccomment'>/// of the header in the header tables (the 1-based index that HPACK uses)</span>
    <span class='doccomment'>/// and a `bool` indicating whether the value of the header also matched.</span>
    <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>find_header</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>, <span class='ident'>header</span>: (<span class='kw-2'>&amp;</span>[<span class='ident'>u8</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'>usize</span>, <span class='ident'>bool</span>)<span class='op'>&gt;</span> {
        <span class='comment'>// Just does a simple scan of the entire table, searching for a header</span>
        <span class='comment'>// that matches both the name and the value of the given header.</span>
        <span class='comment'>// If no such header is found, then any one of the headers that had a</span>
        <span class='comment'>// matching name is returned, with the appropriate return flag set.</span>
        <span class='comment'>//</span>
        <span class='comment'>// The tables are so small that it is unlikely that the linear scan</span>
        <span class='comment'>// would be a major performance bottlneck. If it does prove to be,</span>
        <span class='comment'>// though, a more efficient lookup/header representation method could</span>
        <span class='comment'>// be devised.</span>
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>matching_name</span>: <span class='prelude-ty'>Option</span><span class='op'>&lt;</span><span class='ident'>usize</span><span class='op'>&gt;</span> <span class='op'>=</span> <span class='prelude-val'>None</span>;
        <span class='kw'>for</span> (<span class='ident'>i</span>, <span class='ident'>h</span>) <span class='kw'>in</span> <span class='self'>self</span>.<span class='ident'>iter</span>().<span class='ident'>enumerate</span>() {
            <span class='kw'>if</span> <span class='ident'>header</span>.<span class='number'>0</span> <span class='op'>==</span> <span class='ident'>h</span>.<span class='number'>0</span> {
                <span class='kw'>if</span> <span class='ident'>header</span>.<span class='number'>1</span> <span class='op'>==</span> <span class='ident'>h</span>.<span class='number'>1</span> {
                    <span class='comment'>// Both name and value matched: returns it immediately</span>
                    <span class='kw'>return</span> <span class='prelude-val'>Some</span>((<span class='ident'>i</span> <span class='op'>+</span> <span class='number'>1</span>, <span class='bool-val'>true</span>));
                }
                <span class='comment'>// If only the name was valid, we continue scanning, hoping to</span>
                <span class='comment'>// find one where both the name and value match. We remember</span>
                <span class='comment'>// this one, in case such a header isn&#39;t found after all.</span>
                <span class='ident'>matching_name</span> <span class='op'>=</span> <span class='prelude-val'>Some</span>(<span class='ident'>i</span> <span class='op'>+</span> <span class='number'>1</span>);
            }
        }

        <span class='comment'>// Finally, if there&#39;s no header with a matching name and value,</span>
        <span class='comment'>// return one that matched only the name, if that *was* found.</span>
        <span class='kw'>match</span> <span class='ident'>matching_name</span> {
            <span class='prelude-val'>Some</span>(<span class='ident'>i</span>) <span class='op'>=&gt;</span> <span class='prelude-val'>Some</span>((<span class='ident'>i</span>, <span class='bool-val'>false</span>)),
            <span class='prelude-val'>None</span> <span class='op'>=&gt;</span> <span class='prelude-val'>None</span>,
        }
    }
}

<span class='doccomment'>/// The table represents the static header table defined by the HPACK spec.</span>
<span class='doccomment'>/// (HPACK, Appendix A)</span>
<span class='kw'>static</span> <span class='ident'>STATIC_TABLE</span>: <span class='kw-2'>&amp;</span><span class='lifetime'>&#39;static</span> [(<span class='kw-2'>&amp;</span><span class='lifetime'>&#39;static</span> [<span class='ident'>u8</span>], <span class='kw-2'>&amp;</span><span class='lifetime'>&#39;static</span> [<span class='ident'>u8</span>])] <span class='op'>=</span> <span class='kw-2'>&amp;</span>[
  (<span class='string'>b&quot;:authority&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;:method&quot;</span>, <span class='string'>b&quot;GET&quot;</span>),
  (<span class='string'>b&quot;:method&quot;</span>, <span class='string'>b&quot;POST&quot;</span>),
  (<span class='string'>b&quot;:path&quot;</span>, <span class='string'>b&quot;/&quot;</span>),
  (<span class='string'>b&quot;:path&quot;</span>, <span class='string'>b&quot;/index.html&quot;</span>),
  (<span class='string'>b&quot;:scheme&quot;</span>, <span class='string'>b&quot;http&quot;</span>),
  (<span class='string'>b&quot;:scheme&quot;</span>, <span class='string'>b&quot;https&quot;</span>),
  (<span class='string'>b&quot;:status&quot;</span>, <span class='string'>b&quot;200&quot;</span>),
  (<span class='string'>b&quot;:status&quot;</span>, <span class='string'>b&quot;204&quot;</span>),
  (<span class='string'>b&quot;:status&quot;</span>, <span class='string'>b&quot;206&quot;</span>),
  (<span class='string'>b&quot;:status&quot;</span>, <span class='string'>b&quot;304&quot;</span>),
  (<span class='string'>b&quot;:status&quot;</span>, <span class='string'>b&quot;400&quot;</span>),
  (<span class='string'>b&quot;:status&quot;</span>, <span class='string'>b&quot;404&quot;</span>),
  (<span class='string'>b&quot;:status&quot;</span>, <span class='string'>b&quot;500&quot;</span>),
  (<span class='string'>b&quot;accept-&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;accept-encoding&quot;</span>, <span class='string'>b&quot;gzip, deflate&quot;</span>),
  (<span class='string'>b&quot;accept-language&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;accept-ranges&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;accept&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;access-control-allow-origin&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;age&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;allow&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;authorization&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;cache-control&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;content-disposition&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;content-encoding&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;content-language&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;content-length&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;content-location&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;content-range&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;content-type&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;cookie&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;date&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;etag&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;expect&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;expires&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;from&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;host&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;if-match&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;if-modified-since&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;if-none-match&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;if-range&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;if-unmodified-since&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;last-modified&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;link&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;location&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;max-forwards&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;proxy-authenticate&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;proxy-authorization&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;range&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;referer&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;refresh&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;retry-after&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;server&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;set-cookie&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;strict-transport-security&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;transfer-encoding&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;user-agent&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;vary&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;via&quot;</span>, <span class='string'>b&quot;&quot;</span>),
  (<span class='string'>b&quot;www-authenticate&quot;</span>, <span class='string'>b&quot;&quot;</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'>DynamicTable</span>;
    <span class='kw'>use</span> <span class='kw'>super</span>::<span class='ident'>HeaderTable</span>;
    <span class='kw'>use</span> <span class='kw'>super</span>::<span class='ident'>STATIC_TABLE</span>;

    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_dynamic_table_size_calculation_simple</span>() {
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>table</span> <span class='op'>=</span> <span class='ident'>DynamicTable</span>::<span class='ident'>new</span>();
        <span class='comment'>// Sanity check</span>
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='number'>0</span>, <span class='ident'>table</span>.<span class='ident'>get_size</span>());

        <span class='ident'>table</span>.<span class='ident'>add_header</span>(<span class='string'>b&quot;a&quot;</span>.<span class='ident'>to_vec</span>(), <span class='string'>b&quot;b&quot;</span>.<span class='ident'>to_vec</span>());

        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='number'>32</span> <span class='op'>+</span> <span class='number'>2</span>, <span class='ident'>table</span>.<span class='ident'>get_size</span>());
    }

    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_dynamic_table_size_calculation</span>() {
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>table</span> <span class='op'>=</span> <span class='ident'>DynamicTable</span>::<span class='ident'>new</span>();

        <span class='ident'>table</span>.<span class='ident'>add_header</span>(<span class='string'>b&quot;a&quot;</span>.<span class='ident'>to_vec</span>(), <span class='string'>b&quot;b&quot;</span>.<span class='ident'>to_vec</span>());
        <span class='ident'>table</span>.<span class='ident'>add_header</span>(<span class='string'>b&quot;123&quot;</span>.<span class='ident'>to_vec</span>(), <span class='string'>b&quot;456&quot;</span>.<span class='ident'>to_vec</span>());
        <span class='ident'>table</span>.<span class='ident'>add_header</span>(<span class='string'>b&quot;a&quot;</span>.<span class='ident'>to_vec</span>(), <span class='string'>b&quot;b&quot;</span>.<span class='ident'>to_vec</span>());

        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='number'>3</span> <span class='op'>*</span> <span class='number'>32</span> <span class='op'>+</span> <span class='number'>2</span> <span class='op'>+</span> <span class='number'>6</span> <span class='op'>+</span> <span class='number'>2</span>, <span class='ident'>table</span>.<span class='ident'>get_size</span>());
    }

    <span class='doccomment'>/// Tests that the `DynamicTable` gets correctly resized (by evicting old</span>
    <span class='doccomment'>/// headers) if it exceeds the maximum size on an insertion.</span>
    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_dynamic_table_auto_resize</span>() {
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>table</span> <span class='op'>=</span> <span class='ident'>DynamicTable</span>::<span class='ident'>with_size</span>(<span class='number'>38</span>);
        <span class='ident'>table</span>.<span class='ident'>add_header</span>(<span class='string'>b&quot;a&quot;</span>.<span class='ident'>to_vec</span>(), <span class='string'>b&quot;b&quot;</span>.<span class='ident'>to_vec</span>());
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='number'>32</span> <span class='op'>+</span> <span class='number'>2</span>, <span class='ident'>table</span>.<span class='ident'>get_size</span>());

        <span class='ident'>table</span>.<span class='ident'>add_header</span>(<span class='string'>b&quot;123&quot;</span>.<span class='ident'>to_vec</span>(), <span class='string'>b&quot;456&quot;</span>.<span class='ident'>to_vec</span>());

        <span class='comment'>// Resized?</span>
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='number'>32</span> <span class='op'>+</span> <span class='number'>6</span>, <span class='ident'>table</span>.<span class='ident'>get_size</span>());
        <span class='comment'>// Only has the second header?</span>
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>table</span>.<span class='ident'>to_vec</span>(), <span class='macro'>vec</span><span class='macro'>!</span>[
            (<span class='string'>b&quot;123&quot;</span>.<span class='ident'>to_vec</span>(), <span class='string'>b&quot;456&quot;</span>.<span class='ident'>to_vec</span>())]);
    }

    <span class='doccomment'>/// Tests that when inserting a new header whose size is larger than the</span>
    <span class='doccomment'>/// size of the entire table, the table is fully emptied.</span>
    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_dynamic_table_auto_resize_into_empty</span>() {
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>table</span> <span class='op'>=</span> <span class='ident'>DynamicTable</span>::<span class='ident'>with_size</span>(<span class='number'>38</span>);
        <span class='ident'>table</span>.<span class='ident'>add_header</span>(<span class='string'>b&quot;a&quot;</span>.<span class='ident'>to_vec</span>(), <span class='string'>b&quot;b&quot;</span>.<span class='ident'>to_vec</span>());
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='number'>32</span> <span class='op'>+</span> <span class='number'>2</span>, <span class='ident'>table</span>.<span class='ident'>get_size</span>());

        <span class='ident'>table</span>.<span class='ident'>add_header</span>(<span class='string'>b&quot;123&quot;</span>.<span class='ident'>to_vec</span>(), <span class='string'>b&quot;4567&quot;</span>.<span class='ident'>to_vec</span>());

        <span class='comment'>// Resized and empty?</span>
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='number'>0</span>, <span class='ident'>table</span>.<span class='ident'>get_size</span>());
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='number'>0</span>, <span class='ident'>table</span>.<span class='ident'>to_vec</span>().<span class='ident'>len</span>());
    }

    <span class='doccomment'>/// Tests that when changing the maximum size of the `DynamicTable`, the</span>
    <span class='doccomment'>/// headers are correctly evicted in order to keep its size below the new</span>
    <span class='doccomment'>/// max.</span>
    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_dynamic_table_change_max_size</span>() {
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>table</span> <span class='op'>=</span> <span class='ident'>DynamicTable</span>::<span class='ident'>new</span>();
        <span class='ident'>table</span>.<span class='ident'>add_header</span>(<span class='string'>b&quot;a&quot;</span>.<span class='ident'>to_vec</span>(), <span class='string'>b&quot;b&quot;</span>.<span class='ident'>to_vec</span>());
        <span class='ident'>table</span>.<span class='ident'>add_header</span>(<span class='string'>b&quot;123&quot;</span>.<span class='ident'>to_vec</span>(), <span class='string'>b&quot;456&quot;</span>.<span class='ident'>to_vec</span>());
        <span class='ident'>table</span>.<span class='ident'>add_header</span>(<span class='string'>b&quot;c&quot;</span>.<span class='ident'>to_vec</span>(), <span class='string'>b&quot;d&quot;</span>.<span class='ident'>to_vec</span>());
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='number'>3</span> <span class='op'>*</span> <span class='number'>32</span> <span class='op'>+</span> <span class='number'>2</span> <span class='op'>+</span> <span class='number'>6</span> <span class='op'>+</span> <span class='number'>2</span>, <span class='ident'>table</span>.<span class='ident'>get_size</span>());

        <span class='ident'>table</span>.<span class='ident'>set_max_table_size</span>(<span class='number'>38</span>);

        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='number'>32</span> <span class='op'>+</span> <span class='number'>2</span>, <span class='ident'>table</span>.<span class='ident'>get_size</span>());
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>table</span>.<span class='ident'>to_vec</span>(), <span class='macro'>vec</span><span class='macro'>!</span>[
            (<span class='string'>b&quot;c&quot;</span>.<span class='ident'>to_vec</span>(), <span class='string'>b&quot;d&quot;</span>.<span class='ident'>to_vec</span>())]);
    }

    <span class='doccomment'>/// Tests that setting the maximum table size to 0 clears the dynamic</span>
    <span class='doccomment'>/// table.</span>
    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_dynamic_table_clear</span>() {
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>table</span> <span class='op'>=</span> <span class='ident'>DynamicTable</span>::<span class='ident'>new</span>();
        <span class='ident'>table</span>.<span class='ident'>add_header</span>(<span class='string'>b&quot;a&quot;</span>.<span class='ident'>to_vec</span>(), <span class='string'>b&quot;b&quot;</span>.<span class='ident'>to_vec</span>());
        <span class='ident'>table</span>.<span class='ident'>add_header</span>(<span class='string'>b&quot;123&quot;</span>.<span class='ident'>to_vec</span>(), <span class='string'>b&quot;456&quot;</span>.<span class='ident'>to_vec</span>());
        <span class='ident'>table</span>.<span class='ident'>add_header</span>(<span class='string'>b&quot;c&quot;</span>.<span class='ident'>to_vec</span>(), <span class='string'>b&quot;d&quot;</span>.<span class='ident'>to_vec</span>());
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='number'>3</span> <span class='op'>*</span> <span class='number'>32</span> <span class='op'>+</span> <span class='number'>2</span> <span class='op'>+</span> <span class='number'>6</span> <span class='op'>+</span> <span class='number'>2</span>, <span class='ident'>table</span>.<span class='ident'>get_size</span>());

        <span class='ident'>table</span>.<span class='ident'>set_max_table_size</span>(<span class='number'>0</span>);

        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='number'>0</span>, <span class='ident'>table</span>.<span class='ident'>len</span>());
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='number'>0</span>, <span class='ident'>table</span>.<span class='ident'>to_vec</span>().<span class='ident'>len</span>());
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='number'>0</span>, <span class='ident'>table</span>.<span class='ident'>get_size</span>());
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='number'>0</span>, <span class='ident'>table</span>.<span class='ident'>get_max_table_size</span>());
    }

    <span class='doccomment'>/// Tests that when the initial max size of the table is 0, nothing</span>
    <span class='doccomment'>/// can be added to the table.</span>
    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_dynamic_table_max_size_zero</span>() {
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>table</span> <span class='op'>=</span> <span class='ident'>DynamicTable</span>::<span class='ident'>with_size</span>(<span class='number'>0</span>);

        <span class='ident'>table</span>.<span class='ident'>add_header</span>(<span class='string'>b&quot;a&quot;</span>.<span class='ident'>to_vec</span>(), <span class='string'>b&quot;b&quot;</span>.<span class='ident'>to_vec</span>());

        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='number'>0</span>, <span class='ident'>table</span>.<span class='ident'>len</span>());
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='number'>0</span>, <span class='ident'>table</span>.<span class='ident'>to_vec</span>().<span class='ident'>len</span>());
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='number'>0</span>, <span class='ident'>table</span>.<span class='ident'>get_size</span>());
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='number'>0</span>, <span class='ident'>table</span>.<span class='ident'>get_max_table_size</span>());
    }

    <span class='doccomment'>/// Tests that the iterator through the `DynamicTable` works when there are</span>
    <span class='doccomment'>/// some elements in the dynamic table.</span>
    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_dynamic_table_iter_with_elems</span>() {
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>table</span> <span class='op'>=</span> <span class='ident'>DynamicTable</span>::<span class='ident'>new</span>();
        <span class='ident'>table</span>.<span class='ident'>add_header</span>(<span class='string'>b&quot;a&quot;</span>.<span class='ident'>to_vec</span>(), <span class='string'>b&quot;b&quot;</span>.<span class='ident'>to_vec</span>());
        <span class='ident'>table</span>.<span class='ident'>add_header</span>(<span class='string'>b&quot;123&quot;</span>.<span class='ident'>to_vec</span>(), <span class='string'>b&quot;456&quot;</span>.<span class='ident'>to_vec</span>());
        <span class='ident'>table</span>.<span class='ident'>add_header</span>(<span class='string'>b&quot;c&quot;</span>.<span class='ident'>to_vec</span>(), <span class='string'>b&quot;d&quot;</span>.<span class='ident'>to_vec</span>());

        <span class='kw'>let</span> <span class='ident'>iter_res</span>: <span class='ident'>Vec</span><span class='op'>&lt;</span>(<span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>], <span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>])<span class='op'>&gt;</span> <span class='op'>=</span> <span class='ident'>table</span>.<span class='ident'>iter</span>().<span class='ident'>collect</span>();

        <span class='kw'>let</span> <span class='ident'>expected</span>: <span class='ident'>Vec</span><span class='op'>&lt;</span>(<span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>], <span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>])<span class='op'>&gt;</span> <span class='op'>=</span> <span class='macro'>vec</span><span class='macro'>!</span>[
            (<span class='string'>b&quot;c&quot;</span>, <span class='string'>b&quot;d&quot;</span>),
            (<span class='string'>b&quot;123&quot;</span>, <span class='string'>b&quot;456&quot;</span>),
            (<span class='string'>b&quot;a&quot;</span>, <span class='string'>b&quot;b&quot;</span>),
        ];
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>iter_res</span>, <span class='ident'>expected</span>);
    }

    <span class='doccomment'>/// Tests that the iterator through the `DynamicTable` works when there are</span>
    <span class='doccomment'>/// no elements in the dynamic table.</span>
    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_dynamic_table_iter_no_elems</span>() {
        <span class='kw'>let</span> <span class='ident'>table</span> <span class='op'>=</span> <span class='ident'>DynamicTable</span>::<span class='ident'>new</span>();

        <span class='kw'>let</span> <span class='ident'>iter_res</span>: <span class='ident'>Vec</span><span class='op'>&lt;</span>(<span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>], <span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>])<span class='op'>&gt;</span> <span class='op'>=</span> <span class='ident'>table</span>.<span class='ident'>iter</span>().<span class='ident'>collect</span>();

        <span class='kw'>let</span> <span class='ident'>expected</span> <span class='op'>=</span> <span class='macro'>vec</span><span class='macro'>!</span>[];
        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>iter_res</span>, <span class='ident'>expected</span>);
    }

    <span class='doccomment'>/// Tests that indexing the header table with indices that correspond to</span>
    <span class='doccomment'>/// entries found in the static table works.</span>
    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_header_table_index_static</span>() {
        <span class='kw'>let</span> <span class='ident'>table</span> <span class='op'>=</span> <span class='ident'>HeaderTable</span>::<span class='ident'>with_static_table</span>(<span class='ident'>STATIC_TABLE</span>);

        <span class='kw'>for</span> (<span class='ident'>index</span>, <span class='ident'>entry</span>) <span class='kw'>in</span> <span class='ident'>STATIC_TABLE</span>.<span class='ident'>iter</span>().<span class='ident'>enumerate</span>() {
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>table</span>.<span class='ident'>get_from_table</span>(<span class='ident'>index</span> <span class='op'>+</span> <span class='number'>1</span>).<span class='ident'>unwrap</span>(), <span class='op'>*</span><span class='ident'>entry</span>);
        }
    }

    <span class='doccomment'>/// Tests that when the given index is out of bounds, the `HeaderTable`</span>
    <span class='doccomment'>/// returns a `None`</span>
    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_header_table_index_out_of_bounds</span>() {
        <span class='kw'>let</span> <span class='ident'>table</span> <span class='op'>=</span> <span class='ident'>HeaderTable</span>::<span class='ident'>with_static_table</span>(<span class='ident'>STATIC_TABLE</span>);

        <span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>table</span>.<span class='ident'>get_from_table</span>(<span class='number'>0</span>).<span class='ident'>is_none</span>());
        <span class='macro'>assert</span><span class='macro'>!</span>(<span class='ident'>table</span>.<span class='ident'>get_from_table</span>(<span class='ident'>STATIC_TABLE</span>.<span class='ident'>len</span>() <span class='op'>+</span> <span class='number'>1</span>).<span class='ident'>is_none</span>());
    }

    <span class='doccomment'>/// Tests that adding entries to the dynamic table through the</span>
    <span class='doccomment'>/// `HeaderTable` interface works.</span>
    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_header_table_add_to_dynamic</span>() {
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>table</span> <span class='op'>=</span> <span class='ident'>HeaderTable</span>::<span class='ident'>with_static_table</span>(<span class='ident'>STATIC_TABLE</span>);
        <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='string'>b&quot;a&quot;</span>.<span class='ident'>to_vec</span>(), <span class='string'>b&quot;b&quot;</span>.<span class='ident'>to_vec</span>());

        <span class='ident'>table</span>.<span class='ident'>add_header</span>(<span class='ident'>header</span>.<span class='number'>0</span>.<span class='ident'>clone</span>(), <span class='ident'>header</span>.<span class='number'>1</span>.<span class='ident'>clone</span>());

        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>table</span>.<span class='ident'>dynamic_table</span>.<span class='ident'>to_vec</span>(), <span class='macro'>vec</span><span class='macro'>!</span>[<span class='ident'>header</span>]);
    }

    <span class='doccomment'>/// Tests that indexing the header table with indices that correspond to</span>
    <span class='doccomment'>/// entries found in the dynamic table works.</span>
    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_header_table_index_dynamic</span>() {
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>table</span> <span class='op'>=</span> <span class='ident'>HeaderTable</span>::<span class='ident'>with_static_table</span>(<span class='ident'>STATIC_TABLE</span>);
        <span class='kw'>let</span> <span class='ident'>header</span> <span class='op'>=</span> (<span class='string'>b&quot;a&quot;</span>.<span class='ident'>to_vec</span>(), <span class='string'>b&quot;b&quot;</span>.<span class='ident'>to_vec</span>());

        <span class='ident'>table</span>.<span class='ident'>add_header</span>(<span class='ident'>header</span>.<span class='number'>0</span>.<span class='ident'>clone</span>(), <span class='ident'>header</span>.<span class='number'>1</span>.<span class='ident'>clone</span>());

        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>table</span>.<span class='ident'>get_from_table</span>(<span class='ident'>STATIC_TABLE</span>.<span class='ident'>len</span>() <span class='op'>+</span> <span class='number'>1</span>).<span class='ident'>unwrap</span>(),
                   ((<span class='kw-2'>&amp;</span><span class='ident'>header</span>.<span class='number'>0</span>[..], <span class='kw-2'>&amp;</span><span class='ident'>header</span>.<span class='number'>1</span>[..])));
    }

    <span class='doccomment'>/// Tests that the `iter` method of the `HeaderTable` returns an iterator</span>
    <span class='doccomment'>/// through *all* the headers found in the header table (static and dynamic</span>
    <span class='doccomment'>/// tables both included)</span>
    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_header_table_iter</span>() {
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>table</span> <span class='op'>=</span> <span class='ident'>HeaderTable</span>::<span class='ident'>with_static_table</span>(<span class='ident'>STATIC_TABLE</span>);
        <span class='kw'>let</span> <span class='ident'>headers</span>: [(<span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>], <span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>]); <span class='number'>2</span>] <span class='op'>=</span> [
            (<span class='string'>b&quot;a&quot;</span>, <span class='string'>b&quot;b&quot;</span>),
            (<span class='string'>b&quot;c&quot;</span>, <span class='string'>b&quot;d&quot;</span>),
        ];
        <span class='kw'>for</span> <span class='ident'>header</span> <span class='kw'>in</span> <span class='ident'>headers</span>.<span class='ident'>iter</span>() {
            <span class='ident'>table</span>.<span class='ident'>add_header</span>(<span class='ident'>header</span>.<span class='number'>0</span>.<span class='ident'>to_vec</span>(), <span class='ident'>header</span>.<span class='number'>1</span>.<span class='ident'>to_vec</span>());
        }

        <span class='kw'>let</span> <span class='ident'>iterated</span>: <span class='ident'>Vec</span><span class='op'>&lt;</span>(<span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>], <span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>])<span class='op'>&gt;</span> <span class='op'>=</span> <span class='ident'>table</span>.<span class='ident'>iter</span>().<span class='ident'>collect</span>();

        <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>iterated</span>.<span class='ident'>len</span>(), <span class='ident'>headers</span>.<span class='ident'>len</span>() <span class='op'>+</span> <span class='ident'>STATIC_TABLE</span>.<span class='ident'>len</span>());
        <span class='comment'>// Part of the static table correctly iterated through</span>
        <span class='kw'>for</span> (<span class='ident'>h1</span>, <span class='ident'>h2</span>) <span class='kw'>in</span> <span class='ident'>iterated</span>.<span class='ident'>iter</span>().<span class='ident'>zip</span>(<span class='ident'>STATIC_TABLE</span>.<span class='ident'>iter</span>()) {
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>h1</span>, <span class='ident'>h2</span>);
        }
        <span class='comment'>// Part of the dynamic table correctly iterated through: the elements</span>
        <span class='comment'>// are in reversed order of insertion in the dynamic table.</span>
        <span class='kw'>for</span> (<span class='ident'>h1</span>, <span class='ident'>h2</span>) <span class='kw'>in</span> <span class='ident'>iterated</span>.<span class='ident'>iter</span>().<span class='ident'>skip</span>(<span class='ident'>STATIC_TABLE</span>.<span class='ident'>len</span>())
                                .<span class='ident'>zip</span>(<span class='ident'>headers</span>.<span class='ident'>iter</span>().<span class='ident'>rev</span>()) {
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>h1</span>, <span class='ident'>h2</span>);
        }
    }

    <span class='doccomment'>/// Tests that searching for an entry in the header table, which should be</span>
    <span class='doccomment'>/// fully in the static table (both name and value), works correctly.</span>
    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_find_header_static_full</span>() {
        <span class='kw'>let</span> <span class='ident'>table</span> <span class='op'>=</span> <span class='ident'>HeaderTable</span>::<span class='ident'>with_static_table</span>(<span class='ident'>STATIC_TABLE</span>);

        <span class='kw'>for</span> (<span class='ident'>i</span>, <span class='ident'>h</span>) <span class='kw'>in</span> <span class='ident'>STATIC_TABLE</span>.<span class='ident'>iter</span>().<span class='ident'>enumerate</span>() {
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>table</span>.<span class='ident'>find_header</span>(<span class='op'>*</span><span class='ident'>h</span>).<span class='ident'>unwrap</span>(),
                       (<span class='ident'>i</span> <span class='op'>+</span> <span class='number'>1</span>, <span class='bool-val'>true</span>));
        }
    }

    <span class='doccomment'>/// Tests that searching for an entry in the header table, which should be</span>
    <span class='doccomment'>/// only partially in the static table (only the name), works correctly.</span>
    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_find_header_static_partial</span>() {
        {
            <span class='kw'>let</span> <span class='ident'>table</span> <span class='op'>=</span> <span class='ident'>HeaderTable</span>::<span class='ident'>with_static_table</span>(<span class='ident'>STATIC_TABLE</span>);
            <span class='kw'>let</span> <span class='ident'>h</span>: (<span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>], <span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>]) <span class='op'>=</span> (<span class='string'>b&quot;:method&quot;</span>, <span class='string'>b&quot;PUT&quot;</span>);

            <span class='kw'>if</span> <span class='kw'>let</span> (<span class='ident'>index</span>, <span class='bool-val'>false</span>) <span class='op'>=</span> <span class='ident'>table</span>.<span class='ident'>find_header</span>(<span class='ident'>h</span>).<span class='ident'>unwrap</span>() {
                <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>h</span>.<span class='number'>0</span>, <span class='ident'>STATIC_TABLE</span>[<span class='ident'>index</span> <span class='op'>-</span> <span class='number'>1</span>].<span class='number'>0</span>);
                <span class='comment'>// The index is the last one with the corresponding name</span>
                <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='number'>3</span>, <span class='ident'>index</span>);
            } <span class='kw'>else</span> {
                <span class='macro'>panic</span><span class='macro'>!</span>(<span class='string'>&quot;The header should have matched only partially&quot;</span>);
            }
        }
        {
            <span class='kw'>let</span> <span class='ident'>table</span> <span class='op'>=</span> <span class='ident'>HeaderTable</span>::<span class='ident'>with_static_table</span>(<span class='ident'>STATIC_TABLE</span>);
            <span class='kw'>let</span> <span class='ident'>h</span>: (<span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>], <span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>]) <span class='op'>=</span> (<span class='string'>b&quot;:status&quot;</span>, <span class='string'>b&quot;333&quot;</span>);

            <span class='kw'>if</span> <span class='kw'>let</span> (<span class='ident'>index</span>, <span class='bool-val'>false</span>) <span class='op'>=</span> <span class='ident'>table</span>.<span class='ident'>find_header</span>(<span class='ident'>h</span>).<span class='ident'>unwrap</span>() {
                <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>h</span>.<span class='number'>0</span>, <span class='ident'>STATIC_TABLE</span>[<span class='ident'>index</span> <span class='op'>-</span> <span class='number'>1</span>].<span class='number'>0</span>);
                <span class='comment'>// The index is the last one with the corresponding name</span>
                <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='number'>14</span>, <span class='ident'>index</span>);
            } <span class='kw'>else</span> {
                <span class='macro'>panic</span><span class='macro'>!</span>(<span class='string'>&quot;The header should have matched only partially&quot;</span>);
            }
        }
        {
            <span class='kw'>let</span> <span class='ident'>table</span> <span class='op'>=</span> <span class='ident'>HeaderTable</span>::<span class='ident'>with_static_table</span>(<span class='ident'>STATIC_TABLE</span>);
            <span class='kw'>let</span> <span class='ident'>h</span>: (<span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>], <span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>]) <span class='op'>=</span> (<span class='string'>b&quot;:authority&quot;</span>, <span class='string'>b&quot;example.com&quot;</span>);

            <span class='kw'>if</span> <span class='kw'>let</span> (<span class='ident'>index</span>, <span class='bool-val'>false</span>) <span class='op'>=</span> <span class='ident'>table</span>.<span class='ident'>find_header</span>(<span class='ident'>h</span>).<span class='ident'>unwrap</span>() {
                <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>h</span>.<span class='number'>0</span>, <span class='ident'>STATIC_TABLE</span>[<span class='ident'>index</span> <span class='op'>-</span> <span class='number'>1</span>].<span class='number'>0</span>);
            } <span class='kw'>else</span> {
                <span class='macro'>panic</span><span class='macro'>!</span>(<span class='string'>&quot;The header should have matched only partially&quot;</span>);
            }
        }
        {
            <span class='kw'>let</span> <span class='ident'>table</span> <span class='op'>=</span> <span class='ident'>HeaderTable</span>::<span class='ident'>with_static_table</span>(<span class='ident'>STATIC_TABLE</span>);
            <span class='kw'>let</span> <span class='ident'>h</span>: (<span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>], <span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>]) <span class='op'>=</span> (<span class='string'>b&quot;www-authenticate&quot;</span>, <span class='string'>b&quot;asdf&quot;</span>);

            <span class='kw'>if</span> <span class='kw'>let</span> (<span class='ident'>index</span>, <span class='bool-val'>false</span>) <span class='op'>=</span> <span class='ident'>table</span>.<span class='ident'>find_header</span>(<span class='ident'>h</span>).<span class='ident'>unwrap</span>() {
                <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>h</span>.<span class='number'>0</span>, <span class='ident'>STATIC_TABLE</span>[<span class='ident'>index</span> <span class='op'>-</span> <span class='number'>1</span>].<span class='number'>0</span>);
            } <span class='kw'>else</span> {
                <span class='macro'>panic</span><span class='macro'>!</span>(<span class='string'>&quot;The header should have matched only partially&quot;</span>);
            }
        }
    }


    <span class='doccomment'>/// Tests that searching for an entry in the header table, which should be</span>
    <span class='doccomment'>/// fully in the dynamic table (both name and value), works correctly.</span>
    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_find_header_dynamic_full</span>() {
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>table</span> <span class='op'>=</span> <span class='ident'>HeaderTable</span>::<span class='ident'>with_static_table</span>(<span class='ident'>STATIC_TABLE</span>);
        <span class='kw'>let</span> <span class='ident'>h</span>: (<span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>], <span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>]) <span class='op'>=</span> (<span class='string'>b&quot;:method&quot;</span>, <span class='string'>b&quot;PUT&quot;</span>);
        <span class='ident'>table</span>.<span class='ident'>add_header</span>(<span class='ident'>h</span>.<span class='number'>0</span>.<span class='ident'>to_vec</span>(), <span class='ident'>h</span>.<span class='number'>1</span>.<span class='ident'>to_vec</span>());

        <span class='kw'>if</span> <span class='kw'>let</span> (<span class='ident'>index</span>, <span class='bool-val'>true</span>) <span class='op'>=</span> <span class='ident'>table</span>.<span class='ident'>find_header</span>(<span class='ident'>h</span>).<span class='ident'>unwrap</span>() {
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>index</span>, <span class='ident'>STATIC_TABLE</span>.<span class='ident'>len</span>() <span class='op'>+</span> <span class='number'>1</span>);
        } <span class='kw'>else</span> {
            <span class='macro'>panic</span><span class='macro'>!</span>(<span class='string'>&quot;The header should have matched fully&quot;</span>);
        }
    }

    <span class='doccomment'>/// Tests that searching for an entry in the header table, which should be</span>
    <span class='doccomment'>/// only partially in the dynamic table (only the name), works correctly.</span>
    <span class='attribute'>#[<span class='ident'>test</span>]</span>
    <span class='kw'>fn</span> <span class='ident'>test_find_header_dynamic_partial</span>() {
        <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>table</span> <span class='op'>=</span> <span class='ident'>HeaderTable</span>::<span class='ident'>with_static_table</span>(<span class='ident'>STATIC_TABLE</span>);
        <span class='comment'>// First add it to the dynamic table</span>
        {
            <span class='kw'>let</span> <span class='ident'>h</span> <span class='op'>=</span> (<span class='string'>b&quot;X-Custom-Header&quot;</span>, <span class='string'>b&quot;stuff&quot;</span>);
            <span class='ident'>table</span>.<span class='ident'>add_header</span>(<span class='ident'>h</span>.<span class='number'>0</span>.<span class='ident'>to_vec</span>(), <span class='ident'>h</span>.<span class='number'>1</span>.<span class='ident'>to_vec</span>());
        }
        <span class='comment'>// Prepare a search</span>
        <span class='kw'>let</span> <span class='ident'>h</span>: (<span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>], <span class='kw-2'>&amp;</span>[<span class='ident'>u8</span>]) <span class='op'>=</span> (<span class='string'>b&quot;X-Custom-Header&quot;</span>, <span class='string'>b&quot;different-stuff&quot;</span>);

        <span class='comment'>// It must match only partially</span>
        <span class='kw'>if</span> <span class='kw'>let</span> (<span class='ident'>index</span>, <span class='bool-val'>false</span>) <span class='op'>=</span> <span class='ident'>table</span>.<span class='ident'>find_header</span>(<span class='ident'>h</span>).<span class='ident'>unwrap</span>() {
            <span class='comment'>// The index must be the first one in the dynamic table</span>
            <span class='comment'>// segment of the header table.</span>
            <span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>index</span>, <span class='ident'>STATIC_TABLE</span>.<span class='ident'>len</span>() <span class='op'>+</span> <span class='number'>1</span>);
        } <span class='kw'>else</span> {
            <span class='macro'>panic</span><span class='macro'>!</span>(<span class='string'>&quot;The header should have matched only partially&quot;</span>);
        }
    }
}
</pre>
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