pco 1.0.0-rc

Good compression for numerical sequences
Documentation 
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use crate::constants::{Bitlen, OVERSHOOT_PADDING};

// ascii for pco!
pub const MAGIC_HEADER: [u8; 4] = [112, 99, 111, 33];
pub const MAGIC_TERMINATION_BYTE: u8 = 0;
pub const BITS_TO_ENCODE_N_ENTRIES: Bitlen = 24;
pub const BITS_TO_ENCODE_STANDALONE_VERSION: Bitlen = 8;
pub const BITS_TO_ENCODE_VARINT_POWER: Bitlen = 6;
pub const CURRENT_STANDALONE_VERSION: usize = 3;

// padding
pub const STANDALONE_CHUNK_PREAMBLE_PADDING: usize =
  1 + BITS_TO_ENCODE_N_ENTRIES as usize + OVERSHOOT_PADDING;
pub const STANDALONE_HEADER_PADDING: usize = 31;

#[cfg(test)]
mod tests {
  use crate::constants::MAX_ENTRIES;
  use crate::standalone::constants::*;

  #[test]
  fn test_enough_bits() {
    assert!(1 << BITS_TO_ENCODE_N_ENTRIES >= MAX_ENTRIES);
  }
}