Pin out helpers

Add helper functions for proper pinout using GDSFactory

structure.py

@@ -10,3 +10,16 @@ class LibrePDKStructure(gf.Component):
 		self.name = name
 		self.ureg = config.ureg
 		self.config = config
+
+	def add_pin(self, number, pin):
+		ports = {}
+		for pn in pin.ports:
+			self.add_port(port=pin.ports[pn], name=pn+'_'+str(number))
+
+	def add_pin_to(self, o, number, pin):
+		ports = {}
+		for pn in pin.ports:
+			o.add_port(port=pin.ports[pn], name=pn+'_'+str(number))
+
+	def wire_up(self, o):
+		self.add_ports(o.ports)