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authorNorbert Preining <preining@logic.at>2010-05-12 16:54:37 +0000
committerNorbert Preining <preining@logic.at>2010-05-12 16:54:37 +0000
commit661c41a09e39a182865e0b51e34cc995a0dc96e8 (patch)
tree2f79bb1406e22fdcb2587be8ffda6c0c609d7932 /Master/tlpkg/tlperl/lib/Math/BigFloat/Trace.pm
parentb645030efc22e13c2498a1522083634ab91b2de1 (diff)
move tlperl.straw to tlperl
git-svn-id: svn://tug.org/texlive/trunk@18210 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Master/tlpkg/tlperl/lib/Math/BigFloat/Trace.pm')
-rwxr-xr-xMaster/tlpkg/tlperl/lib/Math/BigFloat/Trace.pm58
1 files changed, 58 insertions, 0 deletions
diff --git a/Master/tlpkg/tlperl/lib/Math/BigFloat/Trace.pm b/Master/tlpkg/tlperl/lib/Math/BigFloat/Trace.pm
new file mode 100755
index 00000000000..871b2a969e8
--- /dev/null
+++ b/Master/tlpkg/tlperl/lib/Math/BigFloat/Trace.pm
@@ -0,0 +1,58 @@
+#!/usr/bin/perl -w
+
+package Math::BigFloat::Trace;
+
+require 5.005_02;
+use strict;
+
+use Exporter;
+use Math::BigFloat;
+use vars qw($VERSION @ISA $PACKAGE @EXPORT_OK
+ $accuracy $precision $round_mode $div_scale);
+
+@ISA = qw(Exporter Math::BigFloat);
+
+$VERSION = 0.01;
+
+use overload; # inherit overload from BigFloat
+
+# Globals
+$accuracy = $precision = undef;
+$round_mode = 'even';
+$div_scale = 40;
+
+sub 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];
+ my $self = Math::BigFloat->new($value,$a,$p,$round_mode);
+
+# remember, downgrading may return a BigInt, so don't meddle with class
+# bless $self,$class;
+
+ print "MBF new '$value' => '$self' (",ref($self),")";
+ return $self;
+}
+
+sub import
+ {
+ print "MBF import ",join(' ',@_);
+ my $self = shift;
+
+ # we catch the constants, the rest goes go BigFloat
+ my @a = ();
+ foreach (@_)
+ {
+ push @a, $_ if $_ ne ':constant';
+ }
+ overload::constant float => sub { $self->new(shift); };
+
+ Math::BigFloat->import(@a); # need it for subclasses
+# $self->export_to_level(1,$self,@_); # need this ?
+ }
+
+1;