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| ///////////////////////////////////////////////////////////////////////////
// //
// Copyright (c) 2015 by Charta Software B.V. //
// All rights reserved //
// //
// Version: 1.7.0.83525 //
// Web site: https://pascal.chartasoftware.com/ //
// //
// This code and information are provided "as is" without warranty of //
// any kind. Dissemination of this information or reproduction of //
// this material is strictly forbidden unless prior written permission //
// is obtained from Charta Software B.V.. //
// //
///////////////////////////////////////////////////////////////////////////
unit Mathematics.Sign;
interface
{$SCOPEDENUMS ON}
uses
Boolean,
FloatingPoint._64,
Integer._32;
type
TSign = -1..1;
TSignType = (Signed, Unsigned);
const
sPositive: TSign = +1;
sZero: TSign = 0;
sNegative: TSign = -1;
function SignOf(Value: TInteger32): TSign; overload;
function SignOf(Value: TFloatingPoint64): TSign; overload;
function OppositeSigns(Value1: TFloatingPoint64; Value2: TFloatingPoint64): TBoolean;
implementation
function SignOf(Value: TInteger32): TSign; overload;
begin
if Value > 0 then
Result := sPositive
else if Value = 0 then
Result := sZero
else
Result := sNegative;
end;
function SignOf(Value: TFloatingPoint64): TSign; overload;
begin
if Value > 0 then
Result := sPositive
else if Value = 0 then
Result := sZero
else
Result := sNegative;
end;
function OppositeSigns(Value1: TFloatingPoint64; Value2: TFloatingPoint64): TBoolean;
begin
Result := Value1 * Value2 < 0;
end;
end.
|