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NoiseFigure: Prevent divide by zero when plotting reference data

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Fix Coverity CID 649238 (DIVIDE_BY_ZERO) by validating the reference
column count before using it as a divisor in plotChart().

The reference column count can be cleared when removing reference data,
in on_clearReference_clicked() so ensure chart rendering handles an empty
reference configuration safely.

Signed-off-by: Robin Getz <rgetz503@gmail.com>
This commit is contained in:
Robin Getz
2026-07-19 19:26:39 -04:00
parent 98f43dfd8c
commit ea0f5fa790
1 changed files with 1 additions and 1 deletions
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plugins/channelrx/noisefigure/noisefiguregui.cpp
+1 -1
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@@ -102,7 +102,7 @@ void NoiseFigureGUI::plotChart()
// Create reference data series
QLineSeries *ref = nullptr;
if ((m_refData.size() > 0) && (ui->chartSelect->currentIndex() < m_refCols-1)) {
if ((m_refData.size() > 0) && (m_refCols > 0) && (ui->chartSelect->currentIndex() < m_refCols-1)) {
ref = new QLineSeries();
for (int i = 0; i < m_refData.size() / m_refCols; i++) {
ref->append(m_refData[i*m_refCols], m_refData[i*m_refCols+ui->chartSelect->currentIndex()+1]);