Function read_varint

nodedb-array/src/codec/coord_delta.rs:48–62

Returns (value, bytes_consumed). Returns None on truncated input.

(data: &[u8])

/// Returns (value, bytes_consumed). Returns None on truncated input.
fn read_varint(data: &[u8]) -> Option<(u64, usize)> {
    let mut val: u64 = 0;
    let mut shift = 0u32;
    for (i, &b) in data.iter().enumerate() {
        val |= ((b & 0x7F) as u64) << shift;
        if b & 0x80 == 0 {
            return Some((val, i + 1));
        }
        shift += 7;
        if shift >= 70 {
            return None;
        }
    }
    None
}

// ---------------------------------------------------------------------------
// Public API