--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/releasing/cbrtools/perl/Archive/Zip/BufferedFileHandle.pm	Wed Jun 30 11:35:58 2010 +0800
@@ -0,0 +1,139 @@
+# Copyright (c) 2000 Ned Konz. All rights reserved.  This program is free
+# software; you can redistribute it and/or modify it under the same terms
+# as Perl itself.
+
+# File handle that uses a string internally and can seek
+# This is given as a demo for getting a zip file written
+# to a string.
+# I probably should just use IO::Scalar instead.
+# Ned Konz, March 2000
+#
+# $Revision: 1.3 $
+
+use strict;
+package Archive::Zip::BufferedFileHandle;
+use FileHandle ();
+use Carp;
+
+sub new
+{
+	my $class = shift || __PACKAGE__;
+	$class = ref($class) || $class;
+	my $self = bless( { 
+		content => '', 
+		position => 0, 
+		size => 0
+	}, $class );
+	return $self;
+}
+
+# Utility method to read entire file
+sub readFromFile
+{
+	my $self = shift;
+	my $fileName = shift;
+	my $fh = FileHandle->new($fileName, "r");
+	if (! $fh)
+	{
+		Carp::carp("Can't open $fileName: $!\n");
+		return undef;
+	}
+	local $/ = undef;
+	$self->{content} = <$fh>;
+	$self->{size} = length($self->{content});
+	return $self;
+}
+
+sub contents
+{
+	my $self = shift;
+	if (@_)
+	{
+		$self->{content} = shift;
+		$self->{size} = length($self->{content});
+	}
+	return $self->{content};
+}
+
+sub binmode
+{ 1 }
+
+sub close
+{ 1 }
+
+sub eof
+{
+	my $self = shift;
+	return $self->{position} >= $self->{size};
+}
+
+sub seek
+{
+	my $self = shift;
+	my $pos = shift;
+	my $whence = shift;
+
+	# SEEK_SET
+	if ($whence == 0) { $self->{position} = $pos; }
+	# SEEK_CUR
+	elsif ($whence == 1) { $self->{position} += $pos; }
+	# SEEK_END
+	elsif ($whence == 2) { $self->{position} = $self->{size} + $pos; }
+	else { return 0; }
+
+	return 1;
+}
+
+sub tell
+{ return shift->{position}; }
+
+# Copy my data to given buffer
+sub read
+{
+	my $self = shift;
+	my $buf = \($_[0]); shift;
+	my $len = shift;
+	my $offset = shift || 0;
+
+	$$buf = '' if not defined($$buf);
+	my $bytesRead = ($self->{position} + $len > $self->{size})
+		? ($self->{size} - $self->{position})
+		: $len;
+	substr($$buf, $offset, $bytesRead) 
+		= substr($self->{content}, $self->{position}, $bytesRead);
+	$self->{position} += $bytesRead;
+	return $bytesRead;
+}
+
+# Copy given buffer to me
+sub write
+{
+	my $self = shift;
+	my $buf = \($_[0]); shift;
+	my $len = shift;
+	my $offset = shift || 0;
+
+	$$buf = '' if not defined($$buf);
+	my $bufLen = length($$buf);
+	my $bytesWritten = ($offset + $len > $bufLen)
+		? $bufLen - $offset
+		: $len;
+	substr($self->{content}, $self->{position}, $bytesWritten)
+		= substr($$buf, $offset, $bytesWritten);
+	$self->{size} = length($self->{content});
+	return $bytesWritten;
+}
+
+sub clearerr() { 1 }
+
+# vim: ts=4 sw=4
+1;
+__END__
+
+=head1 COPYRIGHT
+
+Copyright (c) 2000 Ned Konz. All rights reserved.  This program is free
+software; you can redistribute it and/or modify it under the same terms
+as Perl itself.
+
+=cut