OXYGENHUB
# 5f3fa151688e oxygenhub / crates / hub / src / render / mod.rs
1.4 KiB · Rust · last changed Cache rendered Markdown and highlighted files by content, in memory-bounded LRUs 1 month ago source blame history raw
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//! Rendering helpers with no knowledge of routes: Markdown, syntax
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//! highlighting, diffs, the history graph, and human times. Each is pure
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//! and unit tested.
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pub mod cache;
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pub mod diff;
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pub mod graph;
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pub mod highlight;
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pub mod markdown;
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pub mod refs;
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pub mod time;
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/// HTML-escape text for insertion into element content or attributes.
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pub fn escape(s: &str) -> String {
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    let mut out = String::with_capacity(s.len());
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    for c in s.chars() {
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        match c {
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            '&' => out.push_str("&"),
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            '<' => out.push_str("&lt;"),
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            '>' => out.push_str("&gt;"),
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            '"' => out.push_str("&quot;"),
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            '\'' => out.push_str("&#39;"),
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            _ => out.push(c),
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        }
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    }
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    out
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}
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/// `1.2 KiB`, `3.4 MiB`, `512 B`.
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pub fn bytes(n: u64) -> String {
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    const UNITS: [&str; 5] = ["B", "KiB", "MiB", "GiB", "TiB"];
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    let mut v = n as f64;
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    let mut i = 0;
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    while v >= 1024.0 && i < UNITS.len() - 1 {
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        v /= 1024.0;
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        i += 1;
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    }
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    if i == 0 {
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        format!("{n} B")
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    } else {
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        format!("{v:.1} {}", UNITS[i])
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    }
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}
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#[cfg(test)]
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mod tests {
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    use super::*;
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    #[test]
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    fn escaping_and_sizes() {
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        assert_eq!(escape("<a href=\"x\">&'"), "&lt;a href=&quot;x&quot;&gt;&amp;&#39;");
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        assert_eq!(bytes(512), "512 B");
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        assert_eq!(bytes(1536), "1.5 KiB");
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        assert_eq!(bytes(5 << 20), "5.0 MiB");
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    }
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}