Function encode

nodedb-codec/src/fastlanes/mod.rs:48–68

Encode a slice of i64 values using FOR + bit-packing.

(values: &[i64])

/// Encode a slice of i64 values using FOR + bit-packing.
pub fn encode(values: &[i64]) -> Vec<u8> {
    let total_count = values.len() as u32;
    let block_count = if values.is_empty() {
        0u16
    } else {
        values.len().div_ceil(BLOCK_SIZE) as u16
    };

    let mut out = Vec::with_capacity(GLOBAL_HEADER_SIZE + values.len() * 5);

    // Global header.
    out.extend_from_slice(&total_count.to_le_bytes());
    out.extend_from_slice(&block_count.to_le_bytes());

    // Encode each block.
    for chunk in values.chunks(BLOCK_SIZE) {
        encode_block(chunk, &mut out);
    }

    out
}

/// Decode FOR + bit-packed bytes back to i64 values.
pub fn decode(data: &[u8]) -> Result<Vec<i64>, CodecError> {