[PATCH bleadperl] Math::Big* doc patches (and some code)

[p5sagit/p5-mst-13.2.git] / lib / Math / Complex.pm

diff --git a/lib/Math/Complex.pm b/lib/Math/Complex.pm
index af2b2a0..4634d0f 100644 (file)
--- a/lib/Math/Complex.pm
+++ b/lib/Math/Complex.pm
@@ -7,15 +7,28 @@
 
 package Math::Complex;
 
-$VERSION = "1.30";
-
 our($VERSION, @ISA, @EXPORT, %EXPORT_TAGS, $Inf);
 
+$VERSION = 1.32;
+
 BEGIN {
-    my $e = $!;
-    $Inf = CORE::exp(CORE::exp(30)); # We do want an arithmetic overflow.
-    $! = $e; # Clear ERANGE.
-    undef $Inf unless $Inf =~ /^inf(?:inity)?$/i; # Inf INF inf Infinity
+    unless ($^O eq 'unicosmk') {
+        my $e = $!;
+       # We do want an arithmetic overflow, Inf INF inf Infinity:.
+        undef $Inf unless eval <<'EOE' and $Inf =~ /^inf(?:inity)?$/i;
+         local $SIG{FPE} = sub {die};
+         my $t = CORE::exp 30;
+         $Inf = CORE::exp $t;
+EOE
+       if (!defined $Inf) {            # Try a different method
+         undef $Inf unless eval <<'EOE' and $Inf =~ /^inf(?:inity)?$/i;
+           local $SIG{FPE} = sub {die};
+           my $t = 1;
+           $Inf = $t + "1e99999999999999999999999999999999";
+EOE
+       }
+        $! = $e; # Clear ERANGE.
+    }
     $Inf = "Inf" if !defined $Inf || !($Inf > 0); # Desperation.
 }
 
@@ -661,7 +674,7 @@ sub Re {
 #
 sub Im {
        my ($z, $Im) = @_;
-       return $z unless ref $z;
+       return 0 unless ref $z;
        if (defined $Im) {
            $z->{'cartesian'} = [ ${$z->cartesian}[0], $Im ];
            $z->{c_dirty} = 0;
@@ -1250,23 +1263,15 @@ sub display_format {
                my %obj = %{$self->{display_format}};
                @display_format{keys %obj} = values %obj;
            }
-           if (@_ == 1) {
-               $display_format{style} = shift;
-           } else {
-               my %new = @_;
-               @display_format{keys %new} = values %new;
-           }
-       } else {                                # Called as a class method
-           if (@_ = 1) {
-               $display_format{style} = $self;
-           } else {
-               my %new = @_;
-               @display_format{keys %new} = values %new;
-           }
-           undef $self;
+       }
+       if (@_ == 1) {
+           $display_format{style} = shift;
+       } else {
+           my %new = @_;
+           @display_format{keys %new} = values %new;
        }
 
-       if (defined $self) {
+       if (ref $self) { # Called as an object method
            $self->{display_format} = { %display_format };
            return
                wantarray ?
@@ -1274,6 +1279,7 @@ sub display_format {
                    $self->{display_format}->{style};
        }
 
+        # Called as a class method
        %DISPLAY_FORMAT = %display_format;
        return
            wantarray ?
@@ -1418,6 +1424,8 @@ sub stringify_polar {
 1;
 __END__
 
+=pod
+
 =head1 NAME
 
 Math::Complex - complex numbers and associated mathematical functions