Math/BigRat/Test.pm

package Math::BigRat::Test;

require 5.005_02;
use strict;

use Exporter;
use Math::BigRat;
use Math::BigFloat;
use vars qw($VERSION @ISA
            $accuracy $precision $round_mode $div_scale);

@ISA = qw(Math::BigRat Exporter);
$VERSION = 0.04;

use overload;       # inherit overload from BigRat

# Globals
$accuracy = $precision = undef;
$round_mode = 'even';
$div_scale = 40;

my $class = 'Math::BigRat::Test';

#ub new
#{
#        my $proto  = shift;
#        my $class  = ref($proto) || $proto;
#
#        my $value       = shift;
#   my $a = $accuracy; $a = $_[0] if defined $_[0];
#   my $p = $precision; $p = $_[1] if defined $_[1];
#        # Store the floating point value
#        my $self = Math::BigFloat->new($value,$a,$p,$round_mode);
#        bless $self, $class;
#        $self->{'_custom'} = 1; # make sure this never goes away
#        return $self;
#}

BEGIN
  {
  *fstr = \&bstr;
  *fsstr = \&bsstr;
  *objectify = \&Math::BigInt::objectify;
  *AUTOLOAD = \&Math::BigRat::AUTOLOAD;
  no strict 'refs';
  foreach my $method ( qw/ div acmp floor ceil root sqrt log fac modpow modinv/)
    {
    *{'b' . $method} = \&{'Math::BigRat::b' . $method};
    }
  }

sub fround
  {
  my ($x,$a) = @_;

  #print "$a $accuracy $precision $round_mode\n";
  Math::BigFloat->round_mode($round_mode);
  Math::BigFloat->accuracy($a || $accuracy);
  Math::BigFloat->precision(undef);
  my $y = Math::BigFloat->new($x->bsstr(),undef,undef);
  $class->new($y->fround($a));
  }

sub ffround
  {
  my ($x,$p) = @_;

  Math::BigFloat->round_mode($round_mode);
  Math::BigFloat->accuracy(undef);
  Math::BigFloat->precision($p || $precision);
  my $y = Math::BigFloat->new($x->bsstr(),undef,undef);
  $class->new($y->ffround($p));
  }

sub bstr
  {
  # calculate a BigFloat compatible string output
  my ($x) = @_;

  $x = $class->new($x) unless ref $x;

  if ($x->{sign} !~ /^[+-]$/)           # inf, NaN etc
    {
    my $s = $x->{sign}; $s =~ s/^\+//;  # +inf => inf
    return $s;
    }

  my $s = ''; $s = $x->{sign} if $x->{sign} ne '+';     # +3 vs 3

#  print " bstr \$x ", $accuracy || $x->{_a} || 'notset', " ", $precision || $x->{_p} || 'notset', "\n";
  return $s.$x->{_n} if $x->{_d}->is_one();
  my $output = Math::BigFloat->new($x->{_n})->bdiv($x->{_d});
  local $Math::BigFloat::accuracy = $accuracy || $x->{_a};
  local $Math::BigFloat::precision = $precision || $x->{_p};
  $s.$output->bstr();
  }

sub numify
  {
  $_[0]->bsstr();
  }

sub bsstr
  {
  # calculate a BigFloat compatible string output
  my ($x) = @_;

  $x = $class->new($x) unless ref $x;

  if ($x->{sign} !~ /^[+-]$/)           # inf, NaN etc
    {
    my $s = $x->{sign}; $s =~ s/^\+//;  # +inf => inf
    return $s;
    }

  my $s = ''; $s = $x->{sign} if $x->{sign} ne '+';     # +3 vs 3

  my $output = Math::BigFloat->new($x->{_n})->bdiv($x->{_d});
  return $s.$output->bsstr();
  }

1;