[gobject-introspection] scanner: Don't use an O(N) lookup when we already have a hashmap

[Jasper St. Pierre <jstpierre src gnome org>]

commit 393b242f1ceeef1cc6c974116b4c41578f99931a
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Thu Jun 28 15:13:08 2012 -0400

    scanner: Don't use an O(N) lookup when we already have a hashmap
    
    This is a general code cleanup.

 giscanner/ast.py         |    1 +
 giscanner/transformer.py |   11 ++++-------
 2 files changed, 5 insertions(+), 7 deletions(-)
---
diff --git a/giscanner/ast.py b/giscanner/ast.py
index cab3807..91c6559 100644
--- a/giscanner/ast.py
+++ b/giscanner/ast.py
@@ -822,6 +822,7 @@ class Compound(Node, Registered):
     def add_gtype(self, gtype_name, get_type):
         self.gtype_name = gtype_name
         self.get_type = get_type
+        self.namespace.type_names[gtype_name] = self
 
     def _walk(self, callback, chain):
         for ctor in self.constructors:
diff --git a/giscanner/transformer.py b/giscanner/transformer.py
index cb785e7..834fbac 100644
--- a/giscanner/transformer.py
+++ b/giscanner/transformer.py
@@ -836,13 +836,10 @@ Note that type resolution may not succeed."""
     def _resolve_type_from_gtype_name(self, typeval):
         assert typeval.gtype_name is not None
         for ns in self._iter_namespaces():
-            for node in ns.itervalues():
-                if not (isinstance(node, (ast.Class, ast.Interface))
-                        or (isinstance(node, ast.Registered) and node.get_type is not None)):
-                    continue
-                if node.gtype_name == typeval.gtype_name:
-                    typeval.target_giname = '%s.%s' % (ns.name, node.name)
-                    return True
+            node = ns.type_names.get(typeval.gtype_name, None)
+            if node is not None:
+                typeval.target_giname = '%s.%s' % (ns.name, node.name)
+                return True
         return False
 
     def resolve_type(self, typeval):