55 lines
1.8 KiB
OCaml
55 lines
1.8 KiB
OCaml
(**************************************************************************)
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(* *)
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(* Copyright (c) 2014 - 2016. *)
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(* Dynamic Ledger Solutions, Inc. <contact@tezos.com> *)
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(* *)
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(* All rights reserved. No warranty, explicit or implicit, provided. *)
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(* *)
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(**************************************************************************)
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type fitness = MBytes.t list
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(* Fitness comparison:
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- shortest lists are smaller ;
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- lexicographical order for lists of the same length. *)
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let compare_bytes b1 b2 =
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let len1 = MBytes.length b1 in
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let len2 = MBytes.length b2 in
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let c = compare len1 len2 in
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if c <> 0
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then c
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else
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let rec compare_byte b1 b2 pos len =
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if pos = len
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then 0
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else
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let c = compare (MBytes.get_char b1 pos) (MBytes.get_char b2 pos) in
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if c <> 0
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then c
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else compare_byte b1 b2 (pos+1) len
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in
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compare_byte b1 b2 0 len1
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let compare f1 f2 =
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let rec compare_rec f1 f2 = match f1, f2 with
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| [], [] -> 0
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| i1 :: f1, i2 :: f2 ->
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let i = compare_bytes i1 i2 in
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if i = 0 then compare_rec f1 f2 else i
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| _, _ -> assert false in
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let len = compare (List.length f1) (List.length f2) in
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if len = 0 then compare_rec f1 f2 else len
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let rec pp fmt = function
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| [] -> ()
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| [f] -> Format.fprintf fmt "%s" (Hex_encode.hex_of_bytes f)
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| f1 :: f -> Format.fprintf fmt "%s::%a" (Hex_encode.hex_of_bytes f1) pp f
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let to_string x = Format.asprintf "%a" pp x
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let encoding =
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let open Data_encoding in
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describe ~title: "Tezos block fitness"
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(list bytes)
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