FFT code for d***

Hi

Has anyone written their own fft function for the d*** ? (NOT the
supplied library fft).

I need a fft for measuring signal in noise and not being a DSP person
would prefer to implement it rather than write it from scratch. The d***
library scales the data by 1/N which limits the dynamic range of the fft.

I can post scale and run the fft again until I have a usable number - its
just a lot of extra processing.

Thanks in advance.
.