rust_keylock 0.3.0

A password manager with goals to be Secure, Simple to use, Portable and Extensible
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</pre><pre class='rust '>
<span class='doccomment'>//! Private utility functions</span>

<span class='kw'>const</span> <span class='ident'>TAG_CONT</span>: <span class='ident'>u8</span> <span class='op'>=</span> <span class='number'>0b1000_0000</span>;
<span class='kw'>const</span> <span class='ident'>TAG_TWO_B</span>: <span class='ident'>u8</span> <span class='op'>=</span> <span class='number'>0b1100_0000</span>;
<span class='kw'>const</span> <span class='ident'>TAG_THREE_B</span>: <span class='ident'>u8</span> <span class='op'>=</span> <span class='number'>0b1110_0000</span>;
<span class='kw'>const</span> <span class='ident'>TAG_FOUR_B</span>: <span class='ident'>u8</span> <span class='op'>=</span> <span class='number'>0b1111_0000</span>;
<span class='kw'>const</span> <span class='ident'>MAX_ONE_B</span>: <span class='ident'>u32</span> <span class='op'>=</span> <span class='number'>0x80</span>;
<span class='kw'>const</span> <span class='ident'>MAX_TWO_B</span>: <span class='ident'>u32</span> <span class='op'>=</span> <span class='number'>0x800</span>;
<span class='kw'>const</span> <span class='ident'>MAX_THREE_B</span>: <span class='ident'>u32</span> <span class='op'>=</span> <span class='number'>0x10000</span>;

<span class='attribute'>#[<span class='ident'>inline</span>]</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>encode_utf8</span>(<span class='ident'>c</span>: <span class='ident'>char</span>) <span class='op'>-&gt;</span> <span class='ident'>EncodeUtf8</span> {
    <span class='kw'>let</span> <span class='ident'>code</span> <span class='op'>=</span> <span class='ident'>c</span> <span class='kw'>as</span> <span class='ident'>u32</span>;
    <span class='kw'>let</span> <span class='kw-2'>mut</span> <span class='ident'>buf</span> <span class='op'>=</span> [<span class='number'>0</span>; <span class='number'>4</span>];
    <span class='kw'>let</span> <span class='ident'>pos</span> <span class='op'>=</span> <span class='kw'>if</span> <span class='ident'>code</span> <span class='op'>&lt;</span> <span class='ident'>MAX_ONE_B</span> {
        <span class='ident'>buf</span>[<span class='number'>3</span>] <span class='op'>=</span> <span class='ident'>code</span> <span class='kw'>as</span> <span class='ident'>u8</span>;
        <span class='number'>3</span>
    } <span class='kw'>else</span> <span class='kw'>if</span> <span class='ident'>code</span> <span class='op'>&lt;</span> <span class='ident'>MAX_TWO_B</span> {
        <span class='ident'>buf</span>[<span class='number'>2</span>] <span class='op'>=</span> (<span class='ident'>code</span> <span class='op'>&gt;&gt;</span> <span class='number'>6</span> <span class='op'>&amp;</span> <span class='number'>0x1F</span>) <span class='kw'>as</span> <span class='ident'>u8</span> <span class='op'>|</span> <span class='ident'>TAG_TWO_B</span>;
        <span class='ident'>buf</span>[<span class='number'>3</span>] <span class='op'>=</span> (<span class='ident'>code</span> <span class='op'>&amp;</span> <span class='number'>0x3F</span>) <span class='kw'>as</span> <span class='ident'>u8</span> <span class='op'>|</span> <span class='ident'>TAG_CONT</span>;
        <span class='number'>2</span>
    } <span class='kw'>else</span> <span class='kw'>if</span> <span class='ident'>code</span> <span class='op'>&lt;</span> <span class='ident'>MAX_THREE_B</span> {
        <span class='ident'>buf</span>[<span class='number'>1</span>] <span class='op'>=</span> (<span class='ident'>code</span> <span class='op'>&gt;&gt;</span> <span class='number'>12</span> <span class='op'>&amp;</span> <span class='number'>0x0F</span>) <span class='kw'>as</span> <span class='ident'>u8</span> <span class='op'>|</span> <span class='ident'>TAG_THREE_B</span>;
        <span class='ident'>buf</span>[<span class='number'>2</span>] <span class='op'>=</span> (<span class='ident'>code</span> <span class='op'>&gt;&gt;</span> <span class='number'>6</span> <span class='op'>&amp;</span> <span class='number'>0x3F</span>) <span class='kw'>as</span> <span class='ident'>u8</span> <span class='op'>|</span> <span class='ident'>TAG_CONT</span>;
        <span class='ident'>buf</span>[<span class='number'>3</span>] <span class='op'>=</span> (<span class='ident'>code</span> <span class='op'>&amp;</span> <span class='number'>0x3F</span>) <span class='kw'>as</span> <span class='ident'>u8</span> <span class='op'>|</span> <span class='ident'>TAG_CONT</span>;
        <span class='number'>1</span>
    } <span class='kw'>else</span> {
        <span class='ident'>buf</span>[<span class='number'>0</span>] <span class='op'>=</span> (<span class='ident'>code</span> <span class='op'>&gt;&gt;</span> <span class='number'>18</span> <span class='op'>&amp;</span> <span class='number'>0x07</span>) <span class='kw'>as</span> <span class='ident'>u8</span> <span class='op'>|</span> <span class='ident'>TAG_FOUR_B</span>;
        <span class='ident'>buf</span>[<span class='number'>1</span>] <span class='op'>=</span> (<span class='ident'>code</span> <span class='op'>&gt;&gt;</span> <span class='number'>12</span> <span class='op'>&amp;</span> <span class='number'>0x3F</span>) <span class='kw'>as</span> <span class='ident'>u8</span> <span class='op'>|</span> <span class='ident'>TAG_CONT</span>;
        <span class='ident'>buf</span>[<span class='number'>2</span>] <span class='op'>=</span> (<span class='ident'>code</span> <span class='op'>&gt;&gt;</span> <span class='number'>6</span> <span class='op'>&amp;</span> <span class='number'>0x3F</span>) <span class='kw'>as</span> <span class='ident'>u8</span> <span class='op'>|</span> <span class='ident'>TAG_CONT</span>;
        <span class='ident'>buf</span>[<span class='number'>3</span>] <span class='op'>=</span> (<span class='ident'>code</span> <span class='op'>&amp;</span> <span class='number'>0x3F</span>) <span class='kw'>as</span> <span class='ident'>u8</span> <span class='op'>|</span> <span class='ident'>TAG_CONT</span>;
        <span class='number'>0</span>
    };
    <span class='ident'>EncodeUtf8</span> {
        <span class='ident'>buf</span>: <span class='ident'>buf</span>,
        <span class='ident'>pos</span>: <span class='ident'>pos</span>,
    }
}

<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>EncodeUtf8</span> {
    <span class='ident'>buf</span>: [<span class='ident'>u8</span>; <span class='number'>4</span>],
    <span class='ident'>pos</span>: <span class='ident'>usize</span>,
}

<span class='kw'>impl</span> <span class='ident'>EncodeUtf8</span> {
    <span class='comment'>// FIXME: use this from_utf8_unchecked, since we know it can never fail</span>
    <span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>as_str</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'>str</span> {
        ::<span class='ident'>core</span>::<span class='ident'>str</span>::<span class='ident'>from_utf8</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>.<span class='ident'>buf</span>[<span class='self'>self</span>.<span class='ident'>pos</span>..]).<span class='ident'>unwrap</span>()
    }
}

<span class='attribute'>#[<span class='ident'>allow</span>(<span class='ident'>non_upper_case_globals</span>)]</span>
<span class='kw'>const</span> <span class='ident'>Pattern_White_Space_table</span>: <span class='kw-2'>&amp;</span><span class='lifetime'>&#39;static</span> [(<span class='ident'>char</span>, <span class='ident'>char</span>)] <span class='op'>=</span> <span class='kw-2'>&amp;</span>[(<span class='string'>&#39;\u{9}&#39;</span>, <span class='string'>&#39;\u{d}&#39;</span>),
                                                             (<span class='string'>&#39;\u{20}&#39;</span>, <span class='string'>&#39;\u{20}&#39;</span>),
                                                             (<span class='string'>&#39;\u{85}&#39;</span>, <span class='string'>&#39;\u{85}&#39;</span>),
                                                             (<span class='string'>&#39;\u{200e}&#39;</span>, <span class='string'>&#39;\u{200f}&#39;</span>),
                                                             (<span class='string'>&#39;\u{2028}&#39;</span>, <span class='string'>&#39;\u{2029}&#39;</span>)];

<span class='kw'>fn</span> <span class='ident'>bsearch_range_table</span>(<span class='ident'>c</span>: <span class='ident'>char</span>, <span class='ident'>r</span>: <span class='kw-2'>&amp;</span><span class='lifetime'>&#39;static</span> [(<span class='ident'>char</span>, <span class='ident'>char</span>)]) <span class='op'>-&gt;</span> <span class='ident'>bool</span> {
    <span class='kw'>use</span> <span class='ident'>core</span>::<span class='ident'>cmp</span>::<span class='ident'>Ordering</span>::{<span class='ident'>Equal</span>, <span class='ident'>Less</span>, <span class='ident'>Greater</span>};
    <span class='ident'>r</span>.<span class='ident'>binary_search_by</span>(<span class='op'>|</span><span class='kw-2'>&amp;</span>(<span class='ident'>lo</span>, <span class='ident'>hi</span>)<span class='op'>|</span> <span class='kw'>if</span> <span class='ident'>c</span> <span class='op'>&lt;</span> <span class='ident'>lo</span> {
                              <span class='ident'>Greater</span>
                          } <span class='kw'>else</span> <span class='kw'>if</span> <span class='ident'>hi</span> <span class='op'>&lt;</span> <span class='ident'>c</span> {
            <span class='ident'>Less</span>
        } <span class='kw'>else</span> {
            <span class='ident'>Equal</span>
        })
        .<span class='ident'>is_ok</span>()
}

<span class='attribute'>#[<span class='ident'>allow</span>(<span class='ident'>non_snake_case</span>)]</span>
<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>Pattern_White_Space</span>(<span class='ident'>c</span>: <span class='ident'>char</span>) <span class='op'>-&gt;</span> <span class='ident'>bool</span> {
    <span class='ident'>bsearch_range_table</span>(<span class='ident'>c</span>, <span class='ident'>Pattern_White_Space_table</span>)
}
</pre>
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