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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- ADA.NUMERICS.BIG_NUMBERS.BIG_INTEGERS --
-- --
-- S p e c --
-- --
-- This specification is derived from the Ada Reference Manual for use with --
-- GNAT. In accordance with the copyright of that document, you can freely --
-- copy and modify this specification, provided that if you redistribute a --
-- modified version, any changes that you have made are clearly indicated. --
-- --
------------------------------------------------------------------------------
with Ada.Strings.Text_Buffers; use Ada.Strings.Text_Buffers;
private with Ada.Finalization;
private with System;
package Ada.Numerics.Big_Numbers.Big_Integers with
Preelaborate,
Always_Terminates
is
type Big_Integer is private
with Integer_Literal => From_Universal_Image,
Put_Image => Put_Image;
function Is_Valid (Arg : Big_Integer) return Boolean
with
Convention => Intrinsic,
Global => null;
subtype Valid_Big_Integer is Big_Integer
with Dynamic_Predicate => Is_Valid (Valid_Big_Integer),
Predicate_Failure => raise Program_Error;
function "=" (L, R : Valid_Big_Integer) return Boolean with Global => null;
function "<" (L, R : Valid_Big_Integer) return Boolean with Global => null;
function "<=" (L, R : Valid_Big_Integer) return Boolean with Global => null;
function ">" (L, R : Valid_Big_Integer) return Boolean with Global => null;
function ">=" (L, R : Valid_Big_Integer) return Boolean with Global => null;
function To_Big_Integer (Arg : Integer) return Valid_Big_Integer
with Global => null;
subtype Big_Positive is Big_Integer
with Dynamic_Predicate =>
(if Is_Valid (Big_Positive)
then Big_Positive > To_Big_Integer (0)),
Predicate_Failure => (raise Constraint_Error);
subtype Big_Natural is Big_Integer
with Dynamic_Predicate =>
(if Is_Valid (Big_Natural)
then Big_Natural >= To_Big_Integer (0)),
Predicate_Failure => (raise Constraint_Error);
function In_Range
(Arg : Valid_Big_Integer; Low, High : Big_Integer) return Boolean
is (Low <= Arg and Arg <= High)
with
Global => null;
function To_Integer (Arg : Valid_Big_Integer) return Integer
with
Pre => In_Range (Arg,
Low => To_Big_Integer (Integer'First),
High => To_Big_Integer (Integer'Last))
or else (raise Constraint_Error),
Global => null;
generic
type Int is range <>;
package Signed_Conversions is
function To_Big_Integer (Arg : Int) return Valid_Big_Integer
with Global => null;
function From_Big_Integer (Arg : Valid_Big_Integer) return Int
with
Pre => In_Range (Arg,
Low => To_Big_Integer (Int'First),
High => To_Big_Integer (Int'Last))
or else (raise Constraint_Error),
Global => null;
end Signed_Conversions;
generic
type Int is mod <>;
package Unsigned_Conversions is
function To_Big_Integer (Arg : Int) return Valid_Big_Integer
with Global => null;
function From_Big_Integer (Arg : Valid_Big_Integer) return Int
with
Pre => In_Range (Arg,
Low => To_Big_Integer (Int'First),
High => To_Big_Integer (Int'Last))
or else (raise Constraint_Error),
Global => null;
end Unsigned_Conversions;
function To_String (Arg : Valid_Big_Integer;
Width : Field := 0;
Base : Number_Base := 10) return String
with
Post => To_String'Result'First = 1,
Global => null;
function From_String (Arg : String) return Valid_Big_Integer
with Global => null;
function From_Universal_Image (Arg : String) return Valid_Big_Integer
renames From_String;
procedure Put_Image (S : in out Root_Buffer_Type'Class; V : Big_Integer);
function "+" (L : Valid_Big_Integer) return Valid_Big_Integer
with Global => null;
function "-" (L : Valid_Big_Integer) return Valid_Big_Integer
with Global => null;
function "abs" (L : Valid_Big_Integer) return Valid_Big_Integer
with Global => null;
function "+" (L, R : Valid_Big_Integer) return Valid_Big_Integer
with Global => null;
function "-" (L, R : Valid_Big_Integer) return Valid_Big_Integer
with Global => null;
function "*" (L, R : Valid_Big_Integer) return Valid_Big_Integer
with Global => null;
function "/" (L, R : Valid_Big_Integer) return Valid_Big_Integer
with Global => null;
function "mod" (L, R : Valid_Big_Integer) return Valid_Big_Integer
with Global => null;
function "rem" (L, R : Valid_Big_Integer) return Valid_Big_Integer
with Global => null;
function "**" (L : Valid_Big_Integer; R : Natural) return Valid_Big_Integer
with Global => null;
function Min (L, R : Valid_Big_Integer) return Valid_Big_Integer
with Global => null;
function Max (L, R : Valid_Big_Integer) return Valid_Big_Integer
with Global => null;
function Greatest_Common_Divisor
(L, R : Valid_Big_Integer) return Big_Positive
with
Pre => (L /= To_Big_Integer (0) and R /= To_Big_Integer (0))
or else (raise Constraint_Error),
Global => null;
private
type Controlled_Bignum is new Ada.Finalization.Controlled with record
C : System.Address := System.Null_Address;
end record;
procedure Adjust (This : in out Controlled_Bignum);
procedure Finalize (This : in out Controlled_Bignum);
type Big_Integer is record
Value : Controlled_Bignum;
end record;
end Ada.Numerics.Big_Numbers.Big_Integers;
|
