ganit-core 0.4.2

Spreadsheet formula engine — parser and evaluator for Excel-compatible formulas
Documentation 
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use crate::eval::coercion::to_string_val;
use crate::eval::functions::check_arity;
use crate::types::Value;

/// `ENCODEURL(url)` — percent-encodes a URL string per RFC 3986.
///
/// Characters that are unreserved in RFC 3986 (A-Z, a-z, 0-9, -, _, ., ~)
/// are left unchanged. All other characters are percent-encoded.
pub fn encodeurl_fn(args: &[Value]) -> Value {
    if let Some(err) = check_arity(args, 1, 1) {
        return err;
    }
    let text = match to_string_val(args[0].clone()) {
        Ok(s) => s,
        Err(e) => return e,
    };
    Value::Text(percent_encode(&text))
}

fn percent_encode(s: &str) -> String {
    let mut out = String::with_capacity(s.len());
    for byte in s.bytes() {
        match byte {
            b'A'..=b'Z' | b'a'..=b'z' | b'0'..=b'9'
            | b'-' | b'_' | b'.' | b'~' => {
                out.push(byte as char);
            }
            _ => {
                out.push('%');
                out.push(hex_digit(byte >> 4));
                out.push(hex_digit(byte & 0x0f));
            }
        }
    }
    out
}

fn hex_digit(n: u8) -> char {
    match n {
        0..=9 => (b'0' + n) as char,
        _ => (b'A' + n - 10) as char,
    }
}

#[cfg(test)]
mod tests;