Function str_bounds

nodedb-query/src/msgpack_scan/reader.rs:336–357

Return `(data_start, byte_len)` for the string at `offset` without validating UTF-8. Used internally for key comparison.

(buf: &[u8], offset: usize)

/// Return `(data_start, byte_len)` for the string at `offset` without
/// validating UTF-8. Used internally for key comparison.
pub(crate) fn str_bounds(buf: &[u8], offset: usize) -> Option<(usize, usize)> {
    let tag = get(buf, offset)?;
    match tag {
        0xa0..=0xbf => {
            let len = (tag & 0x1f) as usize;
            Some((offset + 1, len))
        }
        STR8 => {
            let len = get(buf, offset + 1)? as usize;
            Some((offset + 2, len))
        }
        STR16 => {
            let len = read_u16_be(buf, offset + 1)? as usize;
            Some((offset + 3, len))
        }
        STR32 => {
            let len = read_u32_be(buf, offset + 1)? as usize;
            Some((offset + 5, len))
        }
        _ => None,
    }
}

/// Read a boolean from the value at `offset`.
pub fn read_bool(buf: &[u8], offset: usize) -> Option<bool> {