Method parse

crates/vm/src/codecs.rs:454–489

(encoding: &str)

    const UTF_32_NE: Self = Self::Utf32Be;

    fn parse(encoding: &str) -> Option<Self> {
        if let Some(encoding) = encoding.to_lowercase().strip_prefix("utf") {
            let encoding = encoding
                .strip_prefix(|c| ['-', '_'].contains(&c))
                .unwrap_or(encoding);
            if encoding == "8" {
                Some(Self::Utf8)
            } else if let Some(encoding) = encoding.strip_prefix("16") {
                if encoding.is_empty() {
                    return Some(Self::UTF_16_NE);
                }
                let encoding = encoding.strip_prefix(['-', '_']).unwrap_or(encoding);
                match encoding {
                    "be" => Some(Self::Utf16Be),
                    "le" => Some(Self::Utf16Le),
                    _ => None,
                }
            } else if let Some(encoding) = encoding.strip_prefix("32") {
                if encoding.is_empty() {
                    return Some(Self::UTF_32_NE);
                }
                let encoding = encoding.strip_prefix(['-', '_']).unwrap_or(encoding);
                match encoding {
                    "be" => Some(Self::Utf32Be),
                    "le" => Some(Self::Utf32Le),
                    _ => None,
                }
            } else {
                None
            }
        } else if encoding == "cp65001" {
            Some(Self::Utf8)
        } else {
            None
        }
    }
}

struct SurrogatePass;