On 25 May 2014, at 07:19, John Ralls <jra...@ceridwen.us> wrote: > > On 25 May 2014, at 01:54, Christian Stimming (mobil) <christ...@cstimming.de> > wrote: > >> Thanks for starting the discussion. >> >> If we've reached the point where our int64 rational numbers do not fit our >> problem requirements anymore, I'd rather look for a different number >> representation that fits our application domain better. I'm thinking about >> replacing rational numbers by decimal floating point numbers. That is, a >> number is represented by m * 10^e with the mantissa m and exponent e as >> signed integers. This is different from our normal *binary* floating point >> in that we use the exponent with base 10. However, all common rules for >> floating point can be applied just as normal. By the way, maybe there is >> even a standard comparable to IEEE 754 available? >> >> Just another possible way to proceed for solving this problem... > > Is this http://en.wikipedia.org/wiki/Decimal_floating_point what you're > talking about? If so, it says that the IEEE spec is 854, and answers some of > my questions, but leaves out database support.
A different spec: http://speleotrove.com/decimal/decarith.html And an implementation, which is used in CPython: http://www.bytereef.org/mpdecimal/index.html Regards, John Ralls _______________________________________________ gnucash-devel mailing list gnucash-devel@gnucash.org https://lists.gnucash.org/mailman/listinfo/gnucash-devel
