+# The "Error" package contains constants returned as error-codes.
+package ZOOM::Error;
+sub NONE { Net::Z3950::ZOOM::ERROR_NONE }
+sub CONNECT { Net::Z3950::ZOOM::ERROR_CONNECT }
+sub MEMORY { Net::Z3950::ZOOM::ERROR_MEMORY }
+sub ENCODE { Net::Z3950::ZOOM::ERROR_ENCODE }
+sub DECODE { Net::Z3950::ZOOM::ERROR_DECODE }
+sub CONNECTION_LOST { Net::Z3950::ZOOM::ERROR_CONNECTION_LOST }
+sub INIT { Net::Z3950::ZOOM::ERROR_INIT }
+sub INTERNAL { Net::Z3950::ZOOM::ERROR_INTERNAL }
+sub TIMEOUT { Net::Z3950::ZOOM::ERROR_TIMEOUT }
+sub UNSUPPORTED_PROTOCOL { Net::Z3950::ZOOM::ERROR_UNSUPPORTED_PROTOCOL }
+sub UNSUPPORTED_QUERY { Net::Z3950::ZOOM::ERROR_UNSUPPORTED_QUERY }
+sub INVALID_QUERY { Net::Z3950::ZOOM::ERROR_INVALID_QUERY }
+# The following are added specifically for this OO interface
+sub CREATE_QUERY { 20001 }
+sub QUERY_CQL { 20002 }
+sub QUERY_PQF { 20003 }
+sub SORTBY { 20004 }
+sub CLONE { 20005 }
+
+# The "Event" package contains constants returned by last_event()
+package ZOOM::Event;
+sub NONE { Net::Z3950::ZOOM::EVENT_NONE }
+sub CONNECT { Net::Z3950::ZOOM::EVENT_CONNECT }
+sub SEND_DATA { Net::Z3950::ZOOM::EVENT_SEND_DATA }
+sub RECV_DATA { Net::Z3950::ZOOM::EVENT_RECV_DATA }
+sub TIMEOUT { Net::Z3950::ZOOM::EVENT_TIMEOUT }
+sub UNKNOWN { Net::Z3950::ZOOM::EVENT_UNKNOWN }
+sub SEND_APDU { Net::Z3950::ZOOM::EVENT_SEND_APDU }
+sub RECV_APDU { Net::Z3950::ZOOM::EVENT_RECV_APDU }
+sub RECV_RECORD { Net::Z3950::ZOOM::EVENT_RECV_RECORD }
+sub RECV_SEARCH { Net::Z3950::ZOOM::EVENT_RECV_SEARCH }
+
+# ----------------------------------------------------------------------------
+
+package ZOOM;
+
+sub diag_str {
+ my($code) = @_;
+
+ # Special cases for error specific to the OO layer
+ if ($code == ZOOM::Error::CREATE_QUERY) {
+ return "can't create query object";
+ } elsif ($code == ZOOM::Error::QUERY_CQL) {
+ return "can't set CQL query";
+ } elsif ($code == ZOOM::Error::QUERY_PQF) {
+ return "can't set prefix query";
+ } elsif ($code == ZOOM::Error::SORTBY) {
+ return "can't set sort-specification";
+ } elsif ($code == ZOOM::Error::CLONE) {
+ return "can't clone record";
+ }
+
+ return Net::Z3950::ZOOM::diag_str($code);
+}
+
+### More of the ZOOM::Exception instantiations should use this
+sub _oops {
+ my($code, $addinfo) = @_;
+
+ die new ZOOM::Exception($code, diag_str($code), $addinfo);
+}
+
+# ----------------------------------------------------------------------------
+
+package ZOOM::Exception;
+
+sub new {
+ my $class = shift();
+ my($code, $message, $addinfo) = @_;
+ ### support diag-set, too
+
+ return bless {
+ code => $code,
+ message => $message,
+ addinfo => $addinfo,
+ }, $class;
+}
+
+sub code {
+ my $this = shift();
+ return $this->{code};
+}
+
+sub message {
+ my $this = shift();
+ return $this->{message};
+}
+
+sub addinfo {
+ my $this = shift();
+ return $this->{addinfo};
+}
+
+
+# ----------------------------------------------------------------------------
+
+package ZOOM::Options;
+
+sub new {
+ my $class = shift();
+ my($p1, $p2) = @_;
+
+ my $opts;
+ if (@_ == 0) {
+ $opts = Net::Z3950::ZOOM::options_create();
+ } elsif (@_ == 1) {
+ $opts = Net::Z3950::ZOOM::options_create_with_parent($p1->_opts());
+ } elsif (@_ == 2) {
+ $opts = Net::Z3950::ZOOM::options_create_with_parent2($p1->_opts(),
+ $p2->_opts());
+ } else {
+ die "can't make $class object with more than 2 parents";
+ }
+
+ return bless {
+ _opts => $opts,
+ }, $class;
+}
+
+sub _opts {
+ my $this = shift();
+
+ my $_opts = $this->{_opts};
+ die "{_opts} undefined: has this Options block been destroy()ed?"
+ if !defined $_opts;
+
+ return $_opts;
+}
+
+sub option {
+ my $this = shift();
+ my($key, $value) = @_;
+
+ my $oldval = Net::Z3950::ZOOM::options_get($this->_opts(), $key);
+ Net::Z3950::ZOOM::options_set($this->_opts(), $key, $value)
+ if defined $value;
+
+ return $oldval;
+}
+
+sub option_binary {
+ my $this = shift();
+ my($key, $value) = @_;
+
+ my $dummylen = 0;
+ my $oldval = Net::Z3950::ZOOM::options_getl($this->_opts(),
+ $key, $dummylen);
+ Net::Z3950::ZOOM::options_setl($this->_opts(), $key,
+ $value, length($value))
+ if defined $value;
+
+ return $oldval;
+}
+
+# This is a bit stupid, since the scalar values that Perl returns from
+# option() can be used as a boolean; but it's just possible that some
+# applications will rely on ZOOM_options_get_bool()'s idiosyncratic
+# interpretation of what constitutes truth.
+#
+sub bool {
+ my $this = shift();
+ my($key, $default) = @_;
+
+ return Net::Z3950::ZOOM::options_get_bool($this->_opts(), $key, $default);
+}
+
+# .. and the next two are even more stupid
+sub int {
+ my $this = shift();
+ my($key, $default) = @_;
+
+ return Net::Z3950::ZOOM::options_get_int($this->_opts(), $key, $default);
+}
+
+sub set_int {
+ my $this = shift();
+ my($key, $value) = @_;
+
+ Net::Z3950::ZOOM::options_set_int($this->_opts(), $key, $value);
+}
+
+# ### Feel guilty. Feel very, very guilty. I've not been able to
+# get the callback memory-management right in "ZOOM.xs", with
+# the result that the values of $function and $udata passed into
+# this function, which are on the stack, have sometimes been
+# freed by the time they're used by __ZOOM_option_callback(),
+# with hilarious results. To avoid this, I copy the values into
+# module-scoped globals, and pass _those_ into the extension
+# function. To avoid overwriting those globals by subsequent
+# calls, I keep all the old ones, pushed onto the @_function and
+# @_udata arrays, which means that THIS FUNCTION LEAKS MEMORY
+# LIKE IT'S GOING OUT OF FASHION. Not nice. One day, I should
+# fix this, but for now there's more important fish to fry.
+#
+my(@_function, @_udata);
+sub set_callback {
+ my $o1 = shift();
+ my($function, $udata) = @_;
+
+ push @_function, $function;
+ push @_udata, $udata;
+ Net::Z3950::ZOOM::options_set_callback($o1->_opts(),
+ $_function[-1], $_udata[-1]);
+}
+
+sub destroy {
+ my $this = shift();
+
+ Net::Z3950::ZOOM::options_destroy($this->_opts());
+ $this->{_opts} = undef;
+}
+
+
+# ----------------------------------------------------------------------------
+
+package ZOOM::Connection;
+
+sub new {
+ my $class = shift();
+ my($host, $port) = @_;
+
+ my $_conn = Net::Z3950::ZOOM::connection_new($host, $port);
+ my($errcode, $errmsg, $addinfo) = (undef, "dummy", "dummy");
+ $errcode = Net::Z3950::ZOOM::connection_error($_conn, $errmsg, $addinfo);
+ die new ZOOM::Exception($errcode, $errmsg, $addinfo) if $errcode;
+
+ return bless {
+ host => $host,
+ port => $port,
+ _conn => $_conn,
+ };
+}
+
+sub create {
+ my $class = shift();
+ my($options) = @_;
+
+ my $_conn = Net::Z3950::ZOOM::connection_create($options->_opts());
+ return bless {
+ host => undef,
+ port => undef,
+ _conn => $_conn,
+ };
+}
+
+# PRIVATE to this class
+sub _conn {
+ my $this = shift();
+
+ my $_conn = $this->{_conn};
+ die "{_conn} undefined: has this Connection been destroy()ed?"
+ if !defined $_conn;
+
+ return $_conn;
+}
+
+sub error_x {
+ my $this = shift();
+
+ my($errcode, $errmsg, $addinfo, $diagset) = (undef, "dummy", "dummy", "d");
+ $errcode = Net::Z3950::ZOOM::connection_error_x($this->_conn(), $errmsg,
+ $addinfo, $diagset);
+ return ($errcode, $errmsg, $addinfo, $diagset);
+}
+
+sub errcode {
+ my $this = shift();
+ return Net::Z3950::ZOOM::connection_errcode($this->_conn());
+}
+
+sub errmsg {
+ my $this = shift();
+ return Net::Z3950::ZOOM::connection_errmsg($this->_conn());
+}
+
+sub addinfo {
+ my $this = shift();
+ return Net::Z3950::ZOOM::connection_addinfo($this->_conn());
+}
+
+sub connect {
+ my $this = shift();
+ my($host, $port) = @_;
+
+ Net::Z3950::ZOOM::connection_connect($this->_conn(), $host, $port);
+ my($errcode, $errmsg, $addinfo) = (undef, "dummy", "dummy");
+ $errcode = Net::Z3950::ZOOM::connection_error($this->_conn(),
+ $errmsg, $addinfo);
+ die new ZOOM::Exception($errcode, $errmsg, $addinfo) if $errcode;
+ # No return value
+}
+
+sub option {
+ my $this = shift();
+ my($key, $value) = @_;
+
+ my $oldval = Net::Z3950::ZOOM::connection_option_get($this->_conn(), $key);
+ Net::Z3950::ZOOM::connection_option_set($this->_conn(), $key, $value)
+ if defined $value;
+
+ return $oldval;
+}
+
+sub option_binary {
+ my $this = shift();
+ my($key, $value) = @_;
+
+ my $dummylen = 0;
+ my $oldval = Net::Z3950::ZOOM::connection_option_getl($this->_conn(),
+ $key, $dummylen);
+ Net::Z3950::ZOOM::connection_option_setl($this->_conn(), $key,
+ $value, length($value))
+ if defined $value;
+
+ return $oldval;
+}
+
+sub search {
+ my $this = shift();
+ my($query) = @_;
+
+ my $_rs = Net::Z3950::ZOOM::connection_search($this->_conn(),
+ $query->_query());
+ my($errcode, $errmsg, $addinfo) = (undef, "dummy", "dummy");
+ $errcode = Net::Z3950::ZOOM::connection_error($this->_conn(),
+ $errmsg, $addinfo);
+ die new ZOOM::Exception($errcode, $errmsg, $addinfo) if $errcode;
+
+ return _new ZOOM::ResultSet($this, $query, $_rs);
+}
+
+sub search_pqf {
+ my $this = shift();
+ my($pqf) = @_;
+
+ my $_rs = Net::Z3950::ZOOM::connection_search_pqf($this->_conn(), $pqf);
+ my($errcode, $errmsg, $addinfo) = (undef, "dummy", "dummy");
+ $errcode = Net::Z3950::ZOOM::connection_error($this->_conn(),
+ $errmsg, $addinfo);
+ die new ZOOM::Exception($errcode, $errmsg, $addinfo) if $errcode;
+
+ return _new ZOOM::ResultSet($this, $pqf, $_rs);
+}
+
+sub scan {
+ my $this = shift();
+ my($startterm) = @_;
+
+ my $_ss = Net::Z3950::ZOOM::connection_scan($this->_conn(), $startterm);
+ my($errcode, $errmsg, $addinfo) = (undef, "dummy", "dummy");
+ $errcode = Net::Z3950::ZOOM::connection_error($this->_conn(),
+ $errmsg, $addinfo);
+ die new ZOOM::Exception($errcode, $errmsg, $addinfo) if $errcode;