717edc5d79
Signed-off-by: Izuru Yakumo <yakumo.izuru@chaotic.ninja> git-svn-id: file:///srv/svn/repo/kosuzu/trunk@62 eb64cd80-c68d-6f47-b6a3-0ada418499da
23 lines
628 B
OCaml
23 lines
628 B
OCaml
let random_state = Random.State.make_self_init
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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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