NAME

       Math::BigInt::Calc - pure Perl module to support Math::BigInt

SYNOPSIS

           # to use it with Math::BigInt
           use Math::BigInt lib => 'Calc';

           # to use it with Math::BigFloat
           use Math::BigFloat lib => 'Calc';

           # to use it with Math::BigRat
           use Math::BigRat lib => 'Calc';

           # explicitly set base length and whether to "use integer"
           use Math::BigInt::Calc base_len => 4, use_int => 1;
           use Math::BigInt lib => 'Calc';

DESCRIPTION

       Math::BigInt::Calc inherits from Math::BigInt::Lib.

       In this library, the numbers are represented interenally in base B = 10**N, where N is the
       largest possible integer that does not cause overflow in the intermediate computations.
       The base B elements are stored in an array, with the least significant element stored in
       array element zero. There are no leading zero elements, except a single zero element when
       the number is zero. For instance, if B = 10000, the number 1234567890 is represented
       internally as [7890, 3456, 12].

OPTIONS

       When the module is loaded, it computes the maximum exponent, i.e., power of 10, that can
       be used with and without "use integer" in the computations. The default is to use this
       maximum exponent. If the combination of the 'base_len' value and the 'use_int' value
       exceeds the maximum value, an error is thrown.

       base_len
           The base length can be specified explicitly with the 'base_len' option. The value must
           be a positive integer.

               use Math::BigInt::Calc base_len => 4;  # use 10000 as internal base

       use_int
           This option is used to specify whether "use integer" should be used in the internal
           computations. The value is interpreted as a boolean value, so use 0 or "" for false
           and anything else for true. If the 'base_len' is not specified together with
           'use_int', the current value for the base length is used.

               use Math::BigInt::Calc use_int => 1;   # use "use integer" internally

METHODS

       This overview constains only the methods that are specific to "Math::BigInt::Calc". For
       the other methods, see Math::BigInt::Lib.

       _base_len()
           Specify the desired base length and whether to enable "use integer" in the
           computations.

               Math::BigInt::Calc -> _base_len($base_len, $use_int);

           Note that it is better to specify the base length and whether to use integers as
           options when the module is loaded, for example like this

               use Math::BigInt::Calc base_len => 6, use_int => 1;

SEE ALSO

       Math::BigInt::Lib for a description of the API.

       Alternative libraries Math::BigInt::FastCalc, Math::BigInt::GMP, Math::BigInt::Pari,
       Math::BigInt::GMPz, and Math::BigInt::BitVect.

       Some of the modules that use these libraries Math::BigInt, Math::BigFloat, and
       Math::BigRat.