88 lines
3.1 KiB
Standard ML
88 lines
3.1 KiB
Standard ML
(*****************************************************************************)
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(* *)
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(* Open Source License *)
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(* Copyright (c) 2018 Dynamic Ledger Solutions, Inc. <contact@tezos.com> *)
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(* *)
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(* Permission is hereby granted, free of charge, to any person obtaining a *)
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(* copy of this software and associated documentation files (the "Software"),*)
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(* to deal in the Software without restriction, including without limitation *)
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(* the rights to use, copy, modify, merge, publish, distribute, sublicense, *)
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(* and/or sell copies of the Software, and to permit persons to whom the *)
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(* Software is furnished to do so, subject to the following conditions: *)
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(* *)
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(* The above copyright notice and this permission notice shall be included *)
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(* in all copies or substantial portions of the Software. *)
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(* *)
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(* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR*)
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(* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, *)
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(* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL *)
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(* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER*)
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(* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING *)
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(* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER *)
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(* DEALINGS IN THE SOFTWARE. *)
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(* *)
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(*****************************************************************************)
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type n = Natural_tag
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type z = Integer_tag
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type 't num = Z.t
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let compare x y = Z.compare x y
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let zero = Z.zero
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let zero_n = Z.zero
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let to_string x = Z.to_string x
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let of_string s = try Some (Z.of_string s) with _ -> None
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let to_int64 x = try Some (Z.to_int64 x) with _ -> None
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let of_int64 n = Z.of_int64 n
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let to_int x = try Some (Z.to_int x) with _ -> None
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let of_int n = Z.of_int n
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let of_zint x = x
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let to_zint x = x
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let add x y = Z.add x y
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let sub x y = Z.sub x y
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let mul x y = Z.mul x y
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let ediv x y =
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try
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let (q, r) = Z.ediv_rem x y in
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Some (q, r)
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with _ -> None
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let add_n = add
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let mul_n = mul
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let ediv_n = ediv
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let abs x = Z.abs x
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let is_nat x =
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if Compare.Z.(x < Z.zero) then None else Some x
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let neg x = Z.neg x
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let int x = x
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let shift_left x y =
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if Compare.Int.(Z.compare y (Z.of_int 256) > 0) then
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None
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else
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let y = Z.to_int y in
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Some (Z.shift_left x y)
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let shift_right x y =
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if Compare.Int.(Z.compare y (Z.of_int 256) > 0) then
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None
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else
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let y = Z.to_int y in
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Some (Z.shift_right x y)
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let shift_left_n = shift_left
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let shift_right_n = shift_right
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let logor x y = Z.logor x y
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let logxor x y = Z.logxor x y
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let logand x y = Z.logand x y
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let lognot x = Z.lognot x
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