Re: Unsigned 64 bit integer to numeric

>>>>> "Dmitry" == Dmitry Dolgov <9erthalion6(at)gmail(dot)com> writes:

Dmitry> Hi,

Dmitry> Probably a simple question, but I don't see a simple answer so
Dmitry> far. In one extension I want to convert uint64 into a numeric
Dmitry> to put it eventually into a jsonb object. As far as I see in
Dmitry> numeric.c there are functions only for signed int64. Is there a
Dmitry> way to achive this with uint64 (without duplicating significant
Dmitry> part of numeric implementation in the extension)?

Sure. Flip the top bit; convert the value as if signed; then subtract
-(2^63) from the result. (Easier to subtract -(2^63) than to add 2^63,
since the former can itself be represented in a signed int64 for easy
conversion to numeric.)

--
Andrew (irc:RhodiumToad)