Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> .... Maybe something like this,
> obviously with a suitable comment which I haven't written yet:
> numeric_digits = (precision + 6) / 4;
> return (numeric_digits * sizeof(int16)) + NUMERIC_HDRSZ;
This is OK for the base-10K case, but there's still code in there
for the base-10 and base-100 cases. Can you express this logic in
terms of DEC_DIGITS and sizeof(NumericDigit) ? I think you might
find it was actually clearer that way, cf Polya.
regards, tom lane