On 14-03-2012 01:34, Paul D. Anderson wrote:
I'm working on a decimal arithmetic project and I need 128 bit integers
in order to implement the decimal128 type. (The decimal value is stored
in 128 bits; the coefficient field is 114 bits, to hold values with 34
decimal digits.)
I could use BigInt (but that's overkill) or I could code them up myself,
which I'm willing to do if no alternative exists. But surely someone has
already created this type, either as part of a larger project or as some
kind of test problem, etc. Or perhaps someone would like to tackle it as
a project of their own.
I specifically need unsigned 128 bit integers, but both signed and
unsigned versions would probably have more general applications. Better
yet, if it checked for overflow, like Andrei's CheckedInt class in TDPL,
it would be more immediately useful.
This could also be the basis for a general fixed-size integer type,
where the size is specified: CheckedInt!128, CheckedInt!96, etc. I
recall having seen something like this mentioned in this forum.
So has anyone already done this? Does anyone want to take it on?
Thanks,
Paul
The D language specifies 128-bit integers: cent and ucent. They just
aren't implemented yet...
--
- Alex
