Le lundi 01 mai 2006 à 10:41 +0100, John Maddock a écrit :
Yes, I think there would be a positive response to an SOC proposal in this area. You are correct, there is no multiprecision arithmetic support in Boost now. However, be aware that there is some prior work already in the boost sandbox. You might want to have a look at these links:
A big int should be too hard, an arbitary precision floating point arithmetc type would be very welcome too. That's harder as it needs std lib support to be useful (exp, pow, log trig functions etc), so it's rather more work, but then again the student has all summer right ? :-)
I am not sure what you mean by "arbitrary precision floating-point arithmetic". There are two different approaches: arbitrary precision arithmetic (accuracy-driven implementations) and multi-precision floating-point arithmetic (precision-driven implementations). NTL falls in the second category.
The existing lib's in this area all have downsides: NTL is very reliable, but is the most thread-unsafe code I've ever seen. Lydia looks good but is licence constrained, and doesn't really build on Win32. Any others?
MPFR is a C multi-precision floating-point library. IRRAM and Reallib are C++ arbitrary precision libraries. Best regards, Guillaume