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104 lines
2.9 KiB
OCaml
104 lines
2.9 KiB
OCaml
(*
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copyright (c) 2014, Carmelo Piccione
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all rights reserved.
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redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer. redistributions in binary
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form must reproduce the above copyright notice, this list of conditions and the
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following disclaimer in the documentation and/or other materials provided with
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the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*)
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type t = float
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type fpclass = Pervasives.fpclass =
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| FP_normal
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| FP_subnormal
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| FP_zero
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| FP_infinite
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| FP_nan
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let nan = Pervasives.nan
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let infinity = Pervasives.infinity
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let neg_infinity = Pervasives.neg_infinity
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let max_value = infinity
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let min_value = neg_infinity
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let max_finite_value = Pervasives.max_float
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let epsilon = Pervasives.epsilon_float
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let is_nan x = (x : t) <> x
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let add = (+.)
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let sub = (-.)
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let neg = (~-.)
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let abs = Pervasives.abs_float
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let scale = ( *. )
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let min (x : t) y =
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if is_nan x || is_nan y then nan
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else if x < y then x else y
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let max (x : t) y =
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if is_nan x || is_nan y then nan
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else if x > y then x else y
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let equal (a:float) b = a=b
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let hash = Hashtbl.hash
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let compare (a:float) b = Pervasives.compare a b
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type 'a printer = Buffer.t -> 'a -> unit
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type 'a formatter = Format.formatter -> 'a -> unit
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type 'a random_gen = Random.State.t -> 'a
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let pp buf = Printf.bprintf buf "%f"
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let print fmt = Format.pp_print_float fmt
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let sign (a:float) =
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if a < 0.0 then -1
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else if a > 0.0 then 1
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else 0
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let fsign a =
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if is_nan a then nan
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else if a = 0. then a
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else Pervasives.copysign 1. a
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exception TrapNaN of string
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let sign_exn (a:float) =
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if is_nan a then raise (TrapNaN "sign")
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else compare a 0.
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let to_int (a:float) = Pervasives.int_of_float a
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let of_int (a:int) = Pervasives.float_of_int a
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let to_string (a:float) = Pervasives.string_of_float a
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let of_string (a:string) = Pervasives.float_of_string a
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let random n st = Random.State.float st n
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let random_small = random 100.0
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let random_range i j st = i +. random (j-.i) st
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let equal_precision ~epsilon a b = abs_float (a-.b) < epsilon
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let classify = Pervasives.classify_float
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