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Refactor exact-zero guards and update mathematical notations across multiple classes to enhance clarity and prevent division by zero errors.

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This commit is contained in:
Miha Kralj
2026-02-16 22:30:30 -08:00
parent b63b9730e1
commit fa56e2b76d
10 changed files with 38 additions and 54 deletions
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lib/oscillators/cfo/Cfo.cs
+4 -6
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@@ -9,7 +9,7 @@ namespace QuanTAlib;
/// <remarks>
/// Measures the percentage difference between the current price and the
/// Time Series Forecast (linear regression endpoint):
/// <c>CFO = 100 × (source − TSF) / source</c>
/// <c>CFO = 100 × (source − TSF) / source</c>
///
/// Uses O(1) incremental sumY / sumXY maintenance from the PineScript reference.
/// When source equals zero, returns NaN to avoid division by zero.
@@ -26,7 +26,7 @@ public sealed class Cfo : AbstractBase
// Precomputed linear regression constants (full window)
private readonly double _sumX; // 0 + 1 + ... + (period-1)
private readonly double _denomX; // period * sumX2 - sumX²
private readonly double _denomX; // period * sumX2 - sumX²
[StructLayout(LayoutKind.Auto)]
private record struct State(
@@ -147,8 +147,7 @@ public sealed class Cfo : AbstractBase
double tsf = Math.FusedMultiplyAdd(slope, _period - 1, intercept);
// CFO = 100 * (source - tsf) / source
// skipcq: CS-R1077 - Exact-zero guard: value is a price; zero means no data, division by zero produces Infinity
double cfo = value == 0.0 ? double.NaN : 100.0 * (value - tsf) / value;
double cfo = value == 0.0 ? double.NaN : 100.0 * (value - tsf) / value; // skipcq: CS-R1077 - Exact-zero guard: value is a price; zero means no data, division by zero produces Infinity
Last = new TValue(input.Time, cfo);
PubEvent(Last, isNew);
@@ -305,8 +304,7 @@ public sealed class Cfo : AbstractBase
double intercept = (sumY - slope * sumX) / period;
double tsf = Math.FusedMultiplyAdd(slope, period - 1, intercept);
// skipcq: CS-R1077 - Exact-zero guard: val is a price; zero means no data, division by zero produces Infinity
output[i] = val == 0.0 ? double.NaN : 100.0 * (val - tsf) / val;
output[i] = val == 0.0 ? double.NaN : 100.0 * (val - tsf) / val; // skipcq: CS-R1077 - Exact-zero guard: val is a price; zero means no data, division by zero produces Infinity
}
}