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TAChart: Add rounding-error-tolerant comparison functions to TAMath.

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This commit is contained in:
wp_xyz 2023-08-29 18:00:27 +02:00
parent febc06ca63
commit ac7dc35162
1 changed files with 24 additions and 0 deletions
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24
components/tachart/tamath.pas
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@ -24,7 +24,11 @@ procedure EnsureOrder(var A, B: Double); overload; inline;
procedure ExpandRange(var ALo, AHi: Double; ACoeff: Double); procedure ExpandRange(var ALo, AHi: Double; ACoeff: Double);
function GreaterEqual(X, Y: Double; AEpsilon: Double = 0.0): boolean;
function GreaterThan(X, Y: Double; AEpsilon: Double = 0.0): boolean;
function InRangeUlps(AX, ALo, AHi: Double; AMaxUlps: Word): Boolean; function InRangeUlps(AX, ALo, AHi: Double; AMaxUlps: Word): Boolean;
function LessEqual(X, Y: Double; AEpsilon: Double = 0.0): boolean;
function LessThan(X, Y: Double; AEpsilon: Double = 0.0): boolean;
function SafeInfinity: Double; inline; function SafeInfinity: Double; inline;
function SafeInRange(AValue, ABound1, ABound2: Double): Boolean; function SafeInRange(AValue, ABound1, ABound2: Double): Boolean;
@ -143,11 +147,31 @@ begin
AHi += d * ACoeff; AHi += d * ACoeff;
end; end;
function GreaterEqual(X, Y: Double; AEpsilon: Double = 0.0): boolean;
begin
Result := (X > Y) or SameValue(X, Y, AEpsilon);
end;
function GreaterThan(X, Y: Double; AEpsilon: Double = 0.0): boolean;
begin
Result := (X > Y) and not SameValue(X, Y, AEpsilon);
end;
function InRangeUlps(AX, ALo, AHi: Double; AMaxUlps: Word): Boolean; function InRangeUlps(AX, ALo, AHi: Double; AMaxUlps: Word): Boolean;
begin begin
Result := InRange(Ulps(AX), Ulps(ALo) - AMaxUlps, Ulps(AHi) + AMaxUlps); Result := InRange(Ulps(AX), Ulps(ALo) - AMaxUlps, Ulps(AHi) + AMaxUlps);
end; end;
function LessEqual(X, Y: Double; AEpsilon: Double = 0.0): boolean;
begin
Result := (X < Y) or SameValue(X, Y, AEpsilon);
end;
function LessThan(X, Y: Double; AEpsilon: Double = 0.0): boolean;
begin
Result := (X < Y) and not SameValue(X, Y, AEpsilon);
end;
function SafeInfinity: Double; function SafeInfinity: Double;
begin begin
{$PUSH}{$R-}{$Q-} {$PUSH}{$R-}{$Q-}