Input buffer size value gets truncated when it exceeds the size limit
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- Python
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Description
If the input buffer size is assigned a value greater than the size of int32, then the value is truncated and assigned to the buffer size.
I tried to assign a value of 800000000000 to the buffer size and the expectation was that it would raise an error. Rather the buffer was assigned with a value of 1136082944.
NI IO Trace shows that the input_buf_size is getting truncated from 800000000000 to 1136082944 before calling the DAQmx C API,
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Research direction
Start by tracing how input_buf_size is converted before the DAQmx C API call, reproducing the reported assignment of 800000000000 and the resulting truncation to 1136082944. Done means values beyond the supported int32 range raise an error instead of being silently truncated; use NI IO Trace to confirm the value passed to the API.
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Assessment
- Tech stack
- python
- Domain
- api
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 38/100