Description

This program tests the routine LALSZeroPadAndFFT(), which zero-pads and Fourier transforms a real time series of length $N$ to produce a complex frequency series of length $[M/2]+1$.

First, it tests that the correct error codes (cf. Sec. ) are generated for the following error conditions (tests in italics are not performed if LAL_NDEBUG is set, as the corresponding checks in the code are made using the ASSERT macro):

• null pointer to output series
• null pointer to input series
• null pointer to parameter structure
• null pointer to FFT plan
• null pointer to data member of window function
• null pointer to data member of output series
• null pointer to data member of input series
• null pointer to data member of data member of input series
• null pointer to data member of data member of output series
• zero length
• negative time spacing
• zero time spacing
• negative heterodyning frequency
• positive heterodyning frequency
• length mismatch between input series and window function
• length mismatch between output series and zero-padded data
• output series shorter than input series

It then verifies that the correct frequency series^35.2 is generated for the simple test case $\{h[k]=1+k\vert k=0,\ldots,7\}$ with $\delta t=0.5 \textrm{s}$ and rectangular windowing. For each successful test (both of these valid data and the invalid ones described above), it prints ``PASS'' to standard output; if a test fails, it prints ``FAIL''.

If the filename arguments are present, it also reads a time series from a file, calls LALSZeroPadAndFFT(), and writes the results to the specified output file.