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1 | #!/usr/bin/perl -w |
2 | |
3 | package Math::BigInt::Subclass; |
4 | |
5 | require 5.005_02; |
6 | use strict; |
7 | |
8 | use Exporter; |
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9 | use Math::BigInt (1.64); |
10 | # $lib is for the "lib => " test |
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11 | use vars qw($VERSION @ISA $PACKAGE @EXPORT_OK |
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12 | $lib |
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13 | $accuracy $precision $round_mode $div_scale); |
14 | |
15 | @ISA = qw(Exporter Math::BigInt); |
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16 | @EXPORT_OK = qw(bgcd objectify); |
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17 | |
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18 | $VERSION = 0.04; |
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19 | |
20 | use overload; # inherit overload from BigInt |
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21 | |
22 | # Globals |
23 | $accuracy = $precision = undef; |
24 | $round_mode = 'even'; |
25 | $div_scale = 40; |
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26 | $lib = ''; |
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27 | |
28 | sub new |
29 | { |
30 | my $proto = shift; |
31 | my $class = ref($proto) || $proto; |
32 | |
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33 | my $value = shift; |
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34 | my $a = $accuracy; $a = $_[0] if defined $_[0]; |
35 | my $p = $precision; $p = $_[1] if defined $_[1]; |
36 | my $self = Math::BigInt->new($value,$a,$p,$round_mode); |
37 | bless $self,$class; |
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38 | $self->{'_custom'} = 1; # make sure this never goes away |
39 | return $self; |
40 | } |
41 | |
42 | sub bgcd |
43 | { |
44 | Math::BigInt::bgcd(@_); |
45 | } |
46 | |
47 | sub blcm |
48 | { |
49 | Math::BigInt::blcm(@_); |
50 | } |
51 | |
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52 | BEGIN |
53 | { |
54 | *objectify = \&Math::BigInt::objectify; |
55 | |
56 | # these are called by AUTOLOAD from BigFloat, so we need at least these. |
57 | # We cheat, of course.. |
58 | *bneg = \&Math::BigInt::bneg; |
59 | *babs = \&Math::BigInt::babs; |
60 | *bnan = \&Math::BigInt::bnan; |
61 | *binf = \&Math::BigInt::binf; |
62 | *bzero = \&Math::BigInt::bzero; |
63 | *bone = \&Math::BigInt::bone; |
64 | } |
65 | |
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66 | sub import |
67 | { |
68 | my $self = shift; |
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69 | |
70 | my @a; my $t = 0; |
71 | foreach (@_) |
72 | { |
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73 | # remove the "lib => foo" parameters and store it |
74 | $lib = $_, $t = 0, next if $t == 1; |
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75 | if ($_ eq 'lib') |
76 | { |
77 | $t = 1; next; |
78 | } |
79 | push @a,$_; |
80 | } |
81 | $self->SUPER::import(@a); # need it for subclasses |
82 | $self->export_to_level(1,$self,@a); # need this ? |
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83 | } |
84 | |
85 | 1; |