+ #
+ # Read until we've got a full line -- if the engine sends part of
+ # a line and then stops we're pretty much hosed, but that should
+ # never happen.
+ #
+ my $line = '';
+ while ($line !~ /\n/) {
+ my $tmp;
+ my $ret = sysread UCIREAD, $tmp, 1;
+
+ if (!defined($ret)) {
+ next if ($!{EINTR});
+ die "error in reading from the UCI engine: $!";
+ } elsif ($ret == 0) {
+ die "EOF from UCI engine";
+ }
+
+ $line .= $tmp;
+ }
+
+ $line =~ tr/\r\n//d;