Alex Herbert created NUMBERS-213:
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Summary: Selection on a sub-range silently modifies signed-zero
data outside [fromIndex, toIndex)
Key: NUMBERS-213
URL: https://issues.apache.org/jira/browse/NUMBERS-213
Project: Commons Numbers
Issue Type: Bug
Components: arrays
Affects Versions: 1.3
Reporter: Alex Herbert
Selection on double data counts and then removes signs from zeros within the
range {{{}[fromIndex, toIndex){}}}. The count of negatively signed zeros are
then restored after processing.
This begins from the start of the array and not the {{fromIndex}} position and
can silently modify zeros outside the target range, and not restore signed
zeros inside the range:
{code:java}
double[] a = {0.0, 0.0, -0.0};
int from = 1;
int to = 3;
int k = 1;
Selection.select(a, from, to, k);
// Expected: {0.0, -0.0, 0.0}
// Actual: {-0.0, 0.0, 0.0} <-- modifies outside [1, 3).
Inside [1, 3) has no signed zeros.{code}
Issue identified using a security scan.
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