34 lines
956 B
OCaml
34 lines
956 B
OCaml
let random_state = Random.State.make_self_init
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(*module UUID = struct*)
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(*type t = Uuidm.t*)
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(*let compare = Uuidm.compare*)
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(*let to_string = Uuidm.to_string*)
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(*let of_string = Uuidm.of_string*)
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(*let to_bytes = Uuidm.to_bytes*)
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(*let of_bytes = Uuidm.of_bytes*)
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(*let generate ?(random_state=random_state ()) = Uuidm.v4_gen random_state*)
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(*let nil = Uuidm.nil*)
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(*end*)
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type t = string
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let compare = String.compare
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let nil = ""
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let short ?(len) id =
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let id_len = String.length id in
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let l = match len with Some l -> l | None -> if id_len = 36 then 8 else 6 in
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String.sub id 0 (min l id_len)
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let generate ?(len=6) ?(seed=random_state ()) () =
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let b32 i = char_of_int @@
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if i < 10 then i+48 else
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if i < 18 then i+87 else
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if i < 20 then i+88 else
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if i < 22 then i+89 else
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if i < 27 then i+90 else
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if i < 32 then i+91 else
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(invalid_arg ("id.char" ^ string_of_int i)) in
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let c _ = b32 (Random.State.int seed 31) in
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String.init len c
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