Function write_map_header

nodedb/src/data/executor/handlers/join/mod.rs:54–64

Write a msgpack map header.

(buf: &mut Vec<u8>, len: usize)

/// Write a msgpack map header.
pub fn write_map_header(buf: &mut Vec<u8>, len: usize) {
    if len < 16 {
        buf.push(0x80 | len as u8);
    } else if len <= u16::MAX as usize {
        buf.push(0xDE);
        buf.extend_from_slice(&(len as u16).to_be_bytes());
    } else {
        buf.push(0xDF);
        buf.extend_from_slice(&(len as u32).to_be_bytes());
    }
}

/// Iterate msgpack map entries and write each key prefixed with `prefix.`
/// and its value bytes verbatim.