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@simon @jenniferplusplus …he binary ←→ string and dot product code is readily boilerplate, but getting it into a DB extn is potentially a hard thing to look up.

Then again, I’d be extremely suspicious of those string conversion functions. Stuff like this in C code sets off my alarm bells:

char *result = malloc(size * 12 + 2); // Max 10 digits per float + comma + space

(Note no further memory bounds check in the code for that buf! Eek)

Isn’t there a library for that job…?