application/octet-stream
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;;; Nujel - Copyright (C) 2020-2021 - Benjamin Vincent Schulenburg
;;; This project uses the MIT license, a copy should be included under /LICENSE
;;;
;;; Simple implementation of adler32
[defn hash [data]
:export
[def a 1]
[def b 0]
[when [string? data] [set! data [string->buffer data]]]
[when [not= [type-of data] :buffer] [exception :type-error "Can only hash buffers or strings"]]
[def v [buffer/u8* data]]
[dotimes [i [buffer/length data]]
[set! a [mod/int [add/int a [buffer/ref v i]] 65521]]
[set! b [mod/int [add/int a b] 65521]]]
[bit-or a [bit-shift-left b 16]]]
[deftest "00620062" [fmt "{:08X}" [crypto/adler32/hash "a"]]]
[deftest "0F9D02BC" [fmt "{:08X}" [crypto/adler32/hash "asdQWE123"]]]
[deftest "796B110D" [fmt "{:08X}" [crypto/adler32/hash "DiesIstEinTestDerNujelAdler32Implementierung"]]]
