59 lines
1.2 KiB
Perl
59 lines
1.2 KiB
Perl
#!perl
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package Math::BigFloat::Trace;
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require 5.010;
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use strict;
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use warnings;
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use Exporter;
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use Math::BigFloat;
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our ($accuracy, $precision, $round_mode, $div_scale);
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our @ISA = qw(Exporter Math::BigFloat);
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our $VERSION = '0.51';
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use overload; # inherit overload from Math::BigFloat
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# Globals
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$accuracy = $precision = undef;
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$round_mode = 'even';
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$div_scale = 40;
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sub new {
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my $proto = shift;
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my $class = ref($proto) || $proto;
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my $value = shift;
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my $a = $accuracy;
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$a = $_[0] if defined $_[0];
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my $p = $precision;
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$p = $_[1] if defined $_[1];
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my $self = Math::BigFloat->new($value, $a, $p, $round_mode);
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# remember, downgrading may return a BigInt, so don't meddle with class
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# bless $self, $class;
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print "MBF new '$value' => '$self' (", ref($self), ")";
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return $self;
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}
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sub import {
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print "MBF import ", join(' ', @_);
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my $self = shift;
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# we catch the constants, the rest goes go BigFloat
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my @a = ();
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foreach (@_) {
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push @a, $_ if $_ ne ':constant';
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}
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overload::constant float => sub { $self->new(shift); };
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Math::BigFloat->import(@a); # need it for subclasses
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# $self->export_to_level(1,$self,@_); # need this ?
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}
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1;
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