#gmlewis/hash

This package provides hash functions based on Go's implementation: https://cs.opensource.google/go/go/+/refs/tags/go1.23.3:src/hash/hash.go;l=26 which has the copyright notice:

// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

#Status

The code has been updated to support compiler:

$ moon version --all
moon 0.1.20260827 (d0aaa07 2026-08-27) ~/.moon/bin/moon
moonc v0.10.11+6ff76a5f9 (2026-08-28) ~/.moon/bin/moonc
moonrun 0.1.20260827 (d0aaa07 2026-08-27) ~/.moon/bin/moonrun

Hash

source

pub(open) trait Hash {
  fn write(Self, @gmlewis/io.Slice
Slice[Byte]) -> (Int, @gmlewis/io.IOError
IOError?)
  fn sum(Self, @gmlewis/io.Slice
Slice[Byte]) -> @gmlewis/io.Slice
Slice[Byte]
  fn reset(Self) -> Unit
  fn size(Self) -> Int
  fn block_size(Self) -> Int
}

Hash is the common interface implemented by all hash functions.

Hash implementations in the standard library (e.g. [hash/crc32] and [crypto/sha256]) implement the [encoding.BinaryMarshaler] and [encoding.BinaryUnmarshaler] interfaces. Marshaling a hash implementation allows its internal state to be saved and used for additional processing later, without having to re-write the data previously written to the hash. The hash state may contain portions of the input in its original form, which users are expected to handle for any possible security implications.

Compatibility: Any future changes to hash or crypto packages will endeavor to maintain compatibility with state encoded using previous versions. That is, any released versions of the packages should be able to decode data written with any previously released version, subject to issues such as security fixes. See the Go compatibility document for background: https://golang.org/doc/go1compat

Hash32

source

pub(open) trait Hash32 {
  fn sum32(Self) -> UInt
  fn write(Self, @gmlewis/io.Slice
Slice[Byte]) -> (Int, @gmlewis/io.IOError
IOError?)
  fn sum(Self, @gmlewis/io.Slice
Slice[Byte]) -> @gmlewis/io.Slice
Slice[Byte]
  fn reset(Self) -> Unit
  fn size(Self) -> Int
  fn block_size(Self) -> Int
}

Hash32 is the common interface implemented by all 32-bit hash functions.

Hash64

source

pub(open) trait Hash64 {
  fn sum64() -> UInt64
  fn write(Self, @gmlewis/io.Slice
Slice[Byte]) -> (Int, @gmlewis/io.IOError
IOError?)
  fn sum(Self, @gmlewis/io.Slice
Slice[Byte]) -> @gmlewis/io.Slice
Slice[Byte]
  fn reset(Self) -> Unit
  fn size(Self) -> Int
  fn block_size(Self) -> Int
}