+gr_io_signature_sptr
+gr_make_io_signaturev(int min_streams, int max_streams,
+ const std::vector<int> &sizeof_stream_items)
+{
+ return gr_io_signature_sptr (new gr_io_signature (min_streams, max_streams,
+ sizeof_stream_items));
+}
+
+gr_io_signature_sptr
+gr_make_io_signature(int min_streams, int max_streams,
+ int sizeof_stream_item)
+{
+ std::vector<int> sizeof_items(1);
+ sizeof_items[0] = sizeof_stream_item;
+ return gr_make_io_signaturev(min_streams, max_streams, sizeof_items);
+}
+
+gr_io_signature_sptr
+gr_make_io_signature2(int min_streams, int max_streams,
+ int sizeof_stream_item1,
+ int sizeof_stream_item2)
+{
+ std::vector<int> sizeof_items(2);
+ sizeof_items[0] = sizeof_stream_item1;
+ sizeof_items[1] = sizeof_stream_item2;
+ return gr_make_io_signaturev(min_streams, max_streams, sizeof_items);
+}
+
+gr_io_signature_sptr
+gr_make_io_signature3(int min_streams, int max_streams,
+ int sizeof_stream_item1,
+ int sizeof_stream_item2,
+ int sizeof_stream_item3)
+{
+ std::vector<int> sizeof_items(3);
+ sizeof_items[0] = sizeof_stream_item1;
+ sizeof_items[1] = sizeof_stream_item2;
+ sizeof_items[2] = sizeof_stream_item3;
+ return gr_make_io_signaturev(min_streams, max_streams, sizeof_items);
+}
+
+// ------------------------------------------------------------------------
+
+
+gr_io_signature::gr_io_signature (int min_streams, int max_streams,
+ const std::vector<int> &sizeof_stream_items)