> Well, on a datetype is depend only small part in to_char(), I try
> write to_char(numeric, text) version. But I must first explore
> NUMERIC datetupe... (documentation is quiet for this).
NUMERIC's output function returns a null terminated string
representation as usual. Possibly a dash (negative sign), one
or more digits, optionally followed by a decimal point and
one or more digits. And you could get it with an adjusted
number of digits after the decimal point by doing
text *numeric_to_char(Numeric num, format text)
{
char *numstr;
int32 scale;
... /* calculate the wanted number of digits */
... /* after DP in scale depending on format */
numstr = numeric_out(numeric_round(num, scale));
}
There will be "scale" number of digits after the DP, which is
missing if scale is zero. The value will be correct rouded
and/or zero padded at the end.
Wouldn't that be enough for you?
Well, you must work on the string only and cannot read it
into a float internally, but with the above preprocessing, it
should be fairly simple.
Jan
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