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It's theoretically possible for floating point truncation to cause a
math formula to return a small negative number instead of 0. If
sqrt() is called on this small negative number it could cause a
crash. Check for this case and return 0.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Commit 47f30331 converted compress_bisect_add() to use "best reach"
instead of "best add". However, that change caused
compress_bisect_add() to behave poorly when passed in invalid data
(negative times). Change the code to better handle invalid data.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Search for the maximum reachable value instead of the maximum "add".
The maximum reachable value encompasses both the maximum count and a
closest step time to the last requested step time. This allows for
more "add=0" sequences to be generated which the mcu can optimize for.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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The test to check if the queue only needed to be moved was not correct
and it could lead to a segfault if clean_queue() was called instead of
actually increasing the queue size.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Check for an invalid count and report an error if found. This
prevents some segfaults when count goes negative.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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At high step speeds, it is possible to exit the inner scan due to
integer truncation. Always update minadd or maxadd so that the outer
loop always terminates.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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