libstoragemgmt-rust 0.0.2

Rust bindings for libStorageMgmt
Documentation 
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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source of the Rust file `src/misc.rs`."><title>misc.rs - source</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-46f98efaafac5295.ttf.woff2,FiraSans-Regular-018c141bf0843ffd.woff2,FiraSans-Medium-8f9a781e4970d388.woff2,SourceCodePro-Regular-562dcc5011b6de7d.ttf.woff2,SourceCodePro-Semibold-d899c5a5c4aeb14a.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2" crossorigin href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-76eba96aa4d2e634.css"><link rel="stylesheet" href="../../static.files/rustdoc-b0742ba02757f159.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="lsm" data-themes="" data-resource-suffix="" data-rustdoc-version="1.83.0 (90b35a623 2024-11-26) (Fedora 1.83.0-1.fc40)" data-channel="1.83.0" data-search-js="search-f0d225181b97f9a4.js" data-settings-js="settings-805db61a62df4bd2.js" ><script src="../../static.files/storage-1d39b6787ed640ff.js"></script><script defer src="../../static.files/src-script-e66d777a5a92e9b2.js"></script><script defer src="../../src-files.js"></script><script defer src="../../static.files/main-f070b9041d14864c.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-0111fcff984fae8f.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-422f7d1d52889060.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-2c020d218678b618.svg"></head><body class="rustdoc src"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="src-sidebar-title"><h2>Files</h2></div></nav><div class="sidebar-resizer"></div><main><rustdoc-search></rustdoc-search><section id="main-content" class="content"><div class="main-heading"><h1><div class="sub-heading">lsm/</div>misc.rs</h1><rustdoc-toolbar></rustdoc-toolbar></div><div class="example-wrap"><div data-nosnippet><pre class="src-line-numbers">
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<a href="#205" id="205">205</a></pre></div><pre class="rust"><code><span class="comment">// Copyright (C) 2017-2018 Red Hat, Inc.
//
// Permission is hereby granted, free of charge, to any
// person obtaining a copy of this software and associated
// documentation files (the "Software"), to deal in the
// Software without restriction, including without
// limitation the rights to use, copy, modify, merge,
// publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software
// is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice
// shall be included in all copies or substantial portions
// of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
// ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
// TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
// PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
// SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
// IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//
// Author: Gris Ge &lt;fge@redhat.com&gt;

</span><span class="kw">use </span>regex::Regex;

<span class="kw">use </span><span class="kw">super</span>::data::InitiatorType;
<span class="kw">use </span><span class="kw">super</span>::error::<span class="kw-2">*</span>;

<span class="kw">struct </span>SizeUnit&lt;<span class="lifetime">'a</span>&gt; {
    unit: <span class="kw-2">&amp;</span><span class="lifetime">'a </span>str,
    bytes: u64,
}

<span class="kw">const </span>SIZE_CONVS: [SizeUnit&lt;<span class="lifetime">'static</span>&gt;; <span class="number">6</span>] = [
    SizeUnit {
        unit: <span class="string">"EiB"</span>,
        bytes: <span class="number">1u64 </span>&lt;&lt; <span class="number">60</span>,
    },
    SizeUnit {
        unit: <span class="string">"PiB"</span>,
        bytes: <span class="number">1u64 </span>&lt;&lt; <span class="number">50</span>,
    },
    SizeUnit {
        unit: <span class="string">"TiB"</span>,
        bytes: <span class="number">1u64 </span>&lt;&lt; <span class="number">40</span>,
    },
    SizeUnit {
        unit: <span class="string">"GiB"</span>,
        bytes: <span class="number">1u64 </span>&lt;&lt; <span class="number">30</span>,
    },
    SizeUnit {
        unit: <span class="string">"MiB"</span>,
        bytes: <span class="number">1u64 </span>&lt;&lt; <span class="number">20</span>,
    },
    SizeUnit {
        unit: <span class="string">"KiB"</span>,
        bytes: <span class="number">1u64 </span>&lt;&lt; <span class="number">10</span>,
    },
];

<span class="kw">const </span>EXTRA_SIZE_CONVS: [SizeUnit&lt;<span class="lifetime">'static</span>&gt;; <span class="number">7</span>] = [
    SizeUnit {
        unit: <span class="string">"B"</span>,
        bytes: <span class="number">1u64</span>,
    },
    SizeUnit {
        unit: <span class="string">"KB"</span>,
        bytes: <span class="number">1_000u64</span>,
    },
    SizeUnit {
        unit: <span class="string">"MB"</span>,
        bytes: <span class="number">1_000_000u64</span>,
    },
    SizeUnit {
        unit: <span class="string">"GB"</span>,
        bytes: <span class="number">1_000_000_000u64</span>,
    },
    SizeUnit {
        unit: <span class="string">"TB"</span>,
        bytes: <span class="number">1_000_000_000_000u64</span>,
    },
    SizeUnit {
        unit: <span class="string">"PB"</span>,
        bytes: <span class="number">1_000_000_000_000_000u64</span>,
    },
    SizeUnit {
        unit: <span class="string">"EB"</span>,
        bytes: <span class="number">1_000_000_000_000_000_000u64</span>,
    },
];

<span class="doccomment">/// Convert human readable size string into integer size in bytes.
///
/// Following [rules of IEC binary prefixes on size][1].
/// Supported size string formats:
///
///  * `1.9KiB` gets `(1024 * 1.9) as u64`.
///  * `1 KiB` gets `1 * (1 &lt;&lt; 10)`.
///  * `1B` gets  `1u64`.
///  * `2K` is the same as `2KiB`.
///  * `2k` is the same as `2KiB`.
///  * `2KB` gets `2 * 1000`.
///
/// Return 0 if error.
///
/// [1]: https://en.wikipedia.org/wiki/Gibibyte
</span><span class="kw">pub fn </span>size_human_2_size_bytes(s: <span class="kw-2">&amp;</span>str) -&gt; u64 {
    <span class="kw">let </span>regex_size_human = <span class="kw">match </span>Regex::new(
        <span class="string">r"(?x)
        ^
        ([0-9\.]+)          # 1: number
        [\ \t]*             # might have space between number and unit
        ([a-zA-Z]*)         # 2: units
        $
        "</span>,
    ) {
        <span class="prelude-val">Ok</span>(r) =&gt; r,
        <span class="prelude-val">Err</span>(<span class="kw">_</span>) =&gt; <span class="kw">return </span><span class="number">0</span>,
    };

    <span class="kw">let </span>cap = <span class="kw">match </span>regex_size_human.captures(s) {
        <span class="prelude-val">Some</span>(c) =&gt; c,
        <span class="prelude-val">None </span>=&gt; <span class="kw">return </span><span class="number">0</span>,
    };
    <span class="kw">let </span>number = <span class="kw">match </span>cap.get(<span class="number">1</span>) {
        <span class="prelude-val">Some</span>(n) =&gt; n.as_str().parse::&lt;f64&gt;().unwrap_or(<span class="number">0f64</span>),
        <span class="prelude-val">None </span>=&gt; <span class="kw">return </span><span class="number">0</span>,
    };
    <span class="kw">let </span>unit = <span class="kw">match </span>cap.get(<span class="number">2</span>) {
        <span class="prelude-val">Some</span>(u) =&gt; {
            <span class="kw">let </span>tmp = u.as_str().to_uppercase();
            <span class="macro">println!</span>(<span class="string">"tmp: {}"</span>, tmp);
            <span class="kw">if </span>!tmp.ends_with(<span class="string">'B'</span>) {
                <span class="macro">format!</span>(<span class="string">"{}IB"</span>, tmp)
            } <span class="kw">else </span>{
                tmp
            }
        }
        <span class="prelude-val">None </span>=&gt; <span class="kw">return </span><span class="number">0</span>,
    };
    <span class="kw">for </span>size_conv <span class="kw">in </span><span class="kw-2">&amp;</span>SIZE_CONVS {
        <span class="kw">if </span>size_conv.unit.to_uppercase() == unit {
            <span class="kw">return </span>(size_conv.bytes <span class="kw">as </span>f64 * number) <span class="kw">as </span>u64;
        }
    }
    <span class="kw">for </span>size_conv <span class="kw">in </span><span class="kw-2">&amp;</span>EXTRA_SIZE_CONVS {
        <span class="kw">if </span>size_conv.unit == unit {
            <span class="kw">return </span>(size_conv.bytes <span class="kw">as </span>f64 * number) <span class="kw">as </span>u64;
        }
    }
    <span class="number">0
</span>}

<span class="kw">pub fn </span>size_bytes_2_size_human(i: u64) -&gt; String {
    <span class="kw">let </span><span class="kw-2">mut </span>unit = <span class="string">"B"</span>;
    <span class="kw">let </span><span class="kw-2">mut </span>num: f64 = <span class="number">0f64</span>;
    <span class="kw">for </span>size_conv <span class="kw">in </span><span class="kw-2">&amp;</span>SIZE_CONVS {
        <span class="kw">if </span>i &gt;= size_conv.bytes {
            num = (i <span class="kw">as </span>f64) / (size_conv.bytes <span class="kw">as </span>f64);
            unit = size_conv.unit;
            <span class="kw">break</span>;
        }
    }
    <span class="kw">if </span>num == <span class="number">0f64 </span>{
        num = i <span class="kw">as </span>f64;
    }
    <span class="macro">format!</span>(<span class="string">"{:.2}{}"</span>, num, unit)
}

<span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn </span>verify_init_id_str(init_id: <span class="kw-2">&amp;</span>str, init_type: InitiatorType) -&gt; <span class="prelude-ty">Result</span>&lt;()&gt; {
    <span class="kw">let </span>valid: bool = <span class="kw">match </span>init_type {
        InitiatorType::Wwpn =&gt; {
            <span class="kw">let </span>regex_wwpn = Regex::new(
                <span class="string">r"(?x)
                ^(?:0x|0X)?(?:[0-9A-Fa-f]{2})
                (?:(?:[\.:\-])?[0-9A-Fa-f]{2}){7}$
                "</span>,
            )<span class="question-mark">?</span>;
            regex_wwpn.is_match(init_id)
        }
        InitiatorType::IscsiIqn =&gt; {
            init_id.starts_with(<span class="string">"iqn"</span>) || init_id.starts_with(<span class="string">"eui"</span>) || init_id.starts_with(<span class="string">"naa"</span>)
        }
        <span class="kw">_ </span>=&gt; {
            <span class="kw">return </span><span class="prelude-val">Err</span>(LsmError::InvalidArgument(<span class="macro">format!</span>(
                <span class="string">"Invalid init_type {}, should be \
                 InitiatorType::Wwpn or InitiatorType::IscsiIqn."</span>,
                init_type <span class="kw">as </span>i32
            )))
        }
    };
    <span class="kw">if </span>valid {
        <span class="prelude-val">Ok</span>(())
    } <span class="kw">else </span>{
        <span class="prelude-val">Err</span>(LsmError::InvalidArgument(<span class="macro">format!</span>(
            <span class="string">"Invalid initiator ID string '{}'"</span>,
            init_id
        )))
    }
}
</code></pre></div></section></main></body></html>