FM / perl-Math-BigInt

/usr/share/doc/perl-Math-BigInt

Name	Size	Mode	Actions
examples/	-	0755	rm
BUGS	1898	0644	edit dl rm
CHANGES	85348	0644	edit dl rm
CREDITS	1821	0644	edit dl rm
GOALS	1332	0644	edit dl rm
HISTORY	4854	0644	edit dl rm
README	1126	0644	edit dl rm
TODO	2627	0644	edit dl rm

Edit: /usr/share/doc/perl-Math-BigInt/TODO (2627B)

The following list is not up to date:

See also various .pm files.

General:
 * Copy on write (helps for $x = -$x; cases etc) (seems to make it slower :/
 * run config() and die_on_nan() tests under Subclass.pm

Math::BigFloat:
 * finish upgrading and downgrading
 * ! bround()/bfround(): some bugs may lurk in there
 * accuracy() & precision() maybe not finished (bnorm() in every op, testcases)
 * do not reduce numbers in new(), rather do it in anything that outputs it
   like bsstr(), bstr(), mantissa(), exponent() and parts(). Reducing the
   number after each op is slow with a binary core math lib like BitVect.
 * add bfract() that returns just the fractional part?
 * tests for frsft() and flsft() with $n != 2
 * blog() is still quite slow for non-integer results. See if we can reuse the
   integer calculation somehow
 * finish broot() by using different algorithm

Math::BigInt:
 * finish 'upgrade'
 * remove rounding overhead when no rounding is done, e.g. no $object has A nor
   P and neither of bround(), bround(), accuracy() or precision() was called
 * bround() is only used by MBF for -$scale = -$len, anyway. POD is wrong for
   this, too
 * overload of cos()/sin()/exp()/atan2() is too DWIM (should return BigInt or
   BigFloat, not scalar) - also document it
 * +5 % 0 or -5 % 0 == NaN (should it be something else?)
 * certain shortcuts returning bzero(), bone() etc may not set the requested
   rounding parameters, so that $x->foo($y,$a,$p,$r) may return $x without a
   set $a or $p, thus failing later on:

use Test;
        BEGIN { plan tests => 1; }
        use Math::BigInt;
        $x = Math::BigInt->bone();
        $x->bsqrt(3,0,'odd');           # $x = 0, but _a is not 3!
        ok ($x + '12345','12300');      # fails (12346 instead of 12300)

The shortcuts in code that return $x->bzero() or similar things need to
   do $x->bzero($a,$p); and this needs tests.
   Update: Should now work for most things. Check for completeness.

Given the fact that we are be able to plug-in a much faster core-lib, the
following are pretty much ultra-low-priority:

Math::BigInt::Calc:
 * look at div() for more speed (I have the hunch that the general _div()
   routine does way too much work for normal div (e.g. when we don't need
   the reminder). A simplified version could take care of this.
 * alternative mul() method using shifts
 * implement in Calc (and GMP etc) to calculate band(), bior(), bxor() for
   negative inputs (_signed_or() etc)
 * _root() doesn't scale too well

Please send me test-reports, your experiences with this and your ideas - I love
to hear about my work!

cmd: