Vendor import of Perl 5.006

1 files changed, 162 insertions, 153 deletions

diff --git a/contrib/perl5/ext/IO/lib/IO/Select.pm b/contrib/perl5/ext/IO/lib/IO/Select.pm
index dea684a..df92b04 100644
--- a/contrib/perl5/ext/IO/lib/IO/Select.pm
+++ b/contrib/perl5/ext/IO/lib/IO/Select.pm
@@ -1,163 +1,17 @@
 # IO::Select.pm
 #
-# Copyright (c) 1995 Graham Barr. All rights reserved. This program is free
-# software; you can redistribute it and/or modify it under the same terms
-# as Perl itself.
+# Copyright (c) 1997-8 Graham Barr <gbarr@pobox.com>. All rights reserved.
+# This program is free software; you can redistribute it and/or
+# modify it under the same terms as Perl itself.
 
 package IO::Select;
 
-=head1 NAME
-
-IO::Select - OO interface to the select system call
-
-=head1 SYNOPSIS
-
-    use IO::Select;
-
-    $s = IO::Select->new();
-
-    $s->add(\*STDIN);
-    $s->add($some_handle);
-
-    @ready = $s->can_read($timeout);
-
-    @ready = IO::Select->new(@handles)->read(0);
-
-=head1 DESCRIPTION
-
-The C<IO::Select> package implements an object approach to the system C<select>
-function call. It allows the user to see what IO handles, see L<IO::Handle>,
-are ready for reading, writing or have an error condition pending.
-
-=head1 CONSTRUCTOR
-
-=over 4
-
-=item new ( [ HANDLES ] )
-
-The constructor creates a new object and optionally initialises it with a set
-of handles.
-
-=back
-
-=head1 METHODS
-
-=over 4
-
-=item add ( HANDLES )
-
-Add the list of handles to the C<IO::Select> object. It is these values that
-will be returned when an event occurs. C<IO::Select> keeps these values in a
-cache which is indexed by the C<fileno> of the handle, so if more than one
-handle with the same C<fileno> is specified then only the last one is cached.
-
-Each handle can be an C<IO::Handle> object, an integer or an array
-reference where the first element is a C<IO::Handle> or an integer.
-
-=item remove ( HANDLES )
-
-Remove all the given handles from the object. This method also works
-by the C<fileno> of the handles. So the exact handles that were added
-need not be passed, just handles that have an equivalent C<fileno>
-
-=item exists ( HANDLE )
-
-Returns a true value (actually the handle itself) if it is present.
-Returns undef otherwise.
-
-=item handles
-
-Return an array of all registered handles.
-
-=item can_read ( [ TIMEOUT ] )
-
-Return an array of handles that are ready for reading. C<TIMEOUT> is
-the maximum amount of time to wait before returning an empty list. If
-C<TIMEOUT> is not given and any handles are registered then the call
-will block.
-
-=item can_write ( [ TIMEOUT ] )
-
-Same as C<can_read> except check for handles that can be written to.
-
-=item has_error ( [ TIMEOUT ] )
-
-Same as C<can_read> except check for handles that have an error
-condition, for example EOF.
-
-=item count ()
-
-Returns the number of handles that the object will check for when
-one of the C<can_> methods is called or the object is passed to
-the C<select> static method.
-
-=item bits()
-
-Return the bit string suitable as argument to the core select() call.
-
-=item bits()
-
-Return the bit string suitable as argument to the core select() call.
-
-=item select ( READ, WRITE, ERROR [, TIMEOUT ] )
-
-C<select> is a static method, that is you call it with the package
-name like C<new>. C<READ>, C<WRITE> and C<ERROR> are either C<undef>
-or C<IO::Select> objects. C<TIMEOUT> is optional and has the same
-effect as for the core select call.
-
-The result will be an array of 3 elements, each a reference to an array
-which will hold the handles that are ready for reading, writing and have
-error conditions respectively. Upon error an empty array is returned.
-
-=back
-
-=head1 EXAMPLE
-
-Here is a short example which shows how C<IO::Select> could be used
-to write a server which communicates with several sockets while also
-listening for more connections on a listen socket
-
-    use IO::Select;
-    use IO::Socket;
-
-    $lsn = new IO::Socket::INET(Listen => 1, LocalPort => 8080);
-    $sel = new IO::Select( $lsn );
-    
-    while(@ready = $sel->can_read) {
-        foreach $fh (@ready) {
-            if($fh == $lsn) {
-                # Create a new socket
-                $new = $lsn->accept;
-                $sel->add($new);
-            }
-            else {
-                # Process socket
-
-                # Maybe we have finished with the socket
-                $sel->remove($fh);
-                $fh->close;
-            }
-        }
-    }
-
-=head1 AUTHOR
-
-Graham Barr E<lt>F<Graham.Barr@tiuk.ti.com>E<gt>
-
-=head1 COPYRIGHT
-
-Copyright (c) 1995 Graham Barr. All rights reserved. This program is free
-software; you can redistribute it and/or modify it under the same terms
-as Perl itself.
-
-=cut
-
 use     strict;
+use warnings::register;
 use     vars qw($VERSION @ISA);
 require Exporter;
 
-$VERSION = "1.10";
+$VERSION = "1.14";
 
 @ISA = qw(Exporter); # This is only so we can do version checking
 
@@ -193,7 +47,9 @@ sub remove
 sub exists
 {
  my $vec = shift;
- $vec->[$vec->_fileno(shift) + FIRST_FD];
+ my $fno = $vec->_fileno(shift);
+ return undef unless defined $fno;
+ $vec->[$fno + FIRST_FD];
 }
 
 
@@ -261,7 +117,7 @@ sub can_write
     : ();
 }
 
-sub has_error
+sub has_exception
 {
  my $vec = shift;
  my $timeout = shift;
@@ -272,6 +128,13 @@ sub has_error
     : ();
 }
 
+sub has_error
+{
+ warnings::warn("Call to depreciated method 'has_error', use 'has_exception'")
+	if warnings::enabled();
+ goto &has_exception;
+}
+
 sub count
 {
  my $vec = shift;
@@ -369,3 +232,149 @@ sub handles
 }
 
 1;
+__END__
+
+=head1 NAME
+
+IO::Select - OO interface to the select system call
+
+=head1 SYNOPSIS
+
+    use IO::Select;
+
+    $s = IO::Select->new();
+
+    $s->add(\*STDIN);
+    $s->add($some_handle);
+
+    @ready = $s->can_read($timeout);
+
+    @ready = IO::Select->new(@handles)->read(0);
+
+=head1 DESCRIPTION
+
+The C<IO::Select> package implements an object approach to the system C<select>
+function call. It allows the user to see what IO handles, see L<IO::Handle>,
+are ready for reading, writing or have an error condition pending.
+
+=head1 CONSTRUCTOR
+
+=over 4
+
+=item new ( [ HANDLES ] )
+
+The constructor creates a new object and optionally initialises it with a set
+of handles.
+
+=back
+
+=head1 METHODS
+
+=over 4
+
+=item add ( HANDLES )
+
+Add the list of handles to the C<IO::Select> object. It is these values that
+will be returned when an event occurs. C<IO::Select> keeps these values in a
+cache which is indexed by the C<fileno> of the handle, so if more than one
+handle with the same C<fileno> is specified then only the last one is cached.
+
+Each handle can be an C<IO::Handle> object, an integer or an array
+reference where the first element is a C<IO::Handle> or an integer.
+
+=item remove ( HANDLES )
+
+Remove all the given handles from the object. This method also works
+by the C<fileno> of the handles. So the exact handles that were added
+need not be passed, just handles that have an equivalent C<fileno>
+
+=item exists ( HANDLE )
+
+Returns a true value (actually the handle itself) if it is present.
+Returns undef otherwise.
+
+=item handles
+
+Return an array of all registered handles.
+
+=item can_read ( [ TIMEOUT ] )
+
+Return an array of handles that are ready for reading. C<TIMEOUT> is
+the maximum amount of time to wait before returning an empty list. If
+C<TIMEOUT> is not given and any handles are registered then the call
+will block.
+
+=item can_write ( [ TIMEOUT ] )
+
+Same as C<can_read> except check for handles that can be written to.
+
+=item has_exception ( [ TIMEOUT ] )
+
+Same as C<can_read> except check for handles that have an exception
+condition, for example pending out-of-band data.
+
+=item count ()
+
+Returns the number of handles that the object will check for when
+one of the C<can_> methods is called or the object is passed to
+the C<select> static method.
+
+=item bits()
+
+Return the bit string suitable as argument to the core select() call.
+
+=item select ( READ, WRITE, ERROR [, TIMEOUT ] )
+
+C<select> is a static method, that is you call it with the package
+name like C<new>. C<READ>, C<WRITE> and C<ERROR> are either C<undef>
+or C<IO::Select> objects. C<TIMEOUT> is optional and has the same
+effect as for the core select call.
+
+The result will be an array of 3 elements, each a reference to an array
+which will hold the handles that are ready for reading, writing and have
+error conditions respectively. Upon error an empty array is returned.
+
+=back
+
+=head1 EXAMPLE
+
+Here is a short example which shows how C<IO::Select> could be used
+to write a server which communicates with several sockets while also
+listening for more connections on a listen socket
+
+    use IO::Select;
+    use IO::Socket;
+
+    $lsn = new IO::Socket::INET(Listen => 1, LocalPort => 8080);
+    $sel = new IO::Select( $lsn );
+
+    while(@ready = $sel->can_read) {
+        foreach $fh (@ready) {
+            if($fh == $lsn) {
+                # Create a new socket
+                $new = $lsn->accept;
+                $sel->add($new);
+            }
+            else {
+                # Process socket
+
+                # Maybe we have finished with the socket
+                $sel->remove($fh);
+                $fh->close;
+            }
+        }
+    }
+
+=head1 AUTHOR
+
+Graham Barr. Currently maintained by the Perl Porters.  Please report all
+bugs to <perl5-porters@perl.org>.
+
+=head1 COPYRIGHT
+
+Copyright (c) 1997-8 Graham Barr <gbarr@pobox.com>. All rights reserved.
+This program is free software; you can redistribute it and/or
+modify it under the same terms as Perl itself.
+
+=cut
+