Math::BigInt - Arbitrary size integer math package
use Math::BigInt;
$i = Math::BigInt->new($string);
$i->bneg return BINT negation
$i->babs return BINT absolute value
$i->bcmp(BINT) return CODE compare numbers (undef,<0,=0,>0)
$i->badd(BINT) return BINT addition
$i->bsub(BINT) return BINT subtraction
$i->bmul(BINT) return BINT multiplication
$i->bdiv(BINT) return (BINT,BINT) division (quo,rem) just quo if scalar
$i->bmod(BINT) return BINT modulus
$i->bgcd(BINT) return BINT greatest common divisor
$i->bnorm return BINT normalization
$i->blsft(BINT) return BINT left shift
$i->brsft(BINT) return (BINT,BINT) right shift (quo,rem) just quo if scalar
$i->band(BINT) return BINT bit-wise and
$i->bior(BINT) return BINT bit-wise inclusive or
$i->bxor(BINT) return BINT bit-wise exclusive or
$i->bnot return BINT bit-wise not
All basic math operations are overloaded if you declare your big
integers as
$i = new Math::BigInt '123 456 789 123 456 789';
- Canonical notation
-
Big integer value are strings of the form
with leading
zeros suppressed.
- Input
-
Input values to these routines may be strings of the form
.
- Output
-
Output values always always in canonical form
Actual math is done in an internal format consisting of an array
whose first element is the sign (/^[+-]$/) and whose remaining
elements are base 100000 digits with the least significant digit first.
The string 'NaN' is used to represent the result when input arguments
are not numbers, as well as the result of dividing by zero.
'+0' canonical zero value
' -123 123 123' canonical value '-123123123'
'1 23 456 7890' canonical value '+1234567890'
After use Math::BigInt ':constant' all the integer decimal constants
in the given scope are converted to Math::BigInt. This conversion
happens at compile time.
In particular
perl -MMath::BigInt=:constant -e 'print 2**100'
print the integer value of 2**100. Note that without conversion of
constants the expression 2**100 will be calculated as floating point number.
The current version of this module is a preliminary version of the
real thing that is currently (as of perl5.002) under development.
Mark Biggar, overloaded interface by Ilya Zakharevich.
