1 files changed, 42 insertions, 0 deletions
diff --git a/Spline/Netstring.pm b/Spline/Netstring.pm
new file mode 100644
index 0000000..e7e649f
--- /dev/null
+++ b/Spline/Netstring.pm
@@ -0,0 +1,42 @@
+package Spline::Netstring;
+
+use strict;
+use warnings;
+
+our @EXPORT = qw(
+    netstring_read
+    netstring_write
+);
+
+sub read_length($) {
+    my $fd = shift;
+    my $length;
+
+    local $/ = ':';
+    $length = <$fd>;
+    die "Cannot read netstring length" unless defined($length);
+    chomp $length;
+
+    return $length;
+}
+
+sub netstring_read($) {
+    my $fd = shift;
+    my ($length, $data);
+
+    $length = read_length($fd);
+    if (read($fd, $data, $length) == $length) {
+        (getc() eq ',') or die "Closing , missing";
+    }
+    else {
+        die 'Received only ' . length($data) . " of $length bytes";
+    }
+
+    return $data;
+}
+
+sub netstring_write($$) {
+    my ($fd, $data) = @_;
+
+    print $fd length($data).':'.$data.',';
+}