Refactor

- pretty printers moved to pretty module
 - command and subcommands get own module

tools/gdb/python/pretty.py

@@ -0,0 +1,53 @@
+#
+# RTEMS pretty printers
+#
+import re
+import helper
+import objects
+
+import supercore_printer
+import classic_printer
+
+pretty_printer = {
+
+    '^rtems_id$'            : supercore_printer.id,
+    '^Objects_Id$'          : supercore_printer.id,
+    '^Objects_Name$'        : supercore_printer.name,
+    '^Objects_Control$'     : supercore_printer.control,
+    '^States_Control$'      : supercore_printer.state,
+    '^rtems_attribute$'     : classic_printer.attribute,
+    '^Semaphore_Control$'   : classic_printer.semaphore
+}
+
+
+def build_pretty_printer ():
+    pp_dict = {}
+
+    for name in pretty_printer:
+        pp_dict[re.compile(name)] = pretty_printer[name]
+
+    return pp_dict
+
+def lookup_function (val):
+    "Look-up and return a pretty-printer that can print val."
+
+    global nesting
+
+    typename = str(helper.type_from_value(val))
+
+    for function in pp_dict:
+        if function.search (typename):
+            nesting += 1
+            result = pp_dict[function] (val)
+            nesting -= 1
+            if nesting == 0:
+                objects.information.invalidate()
+            return result
+
+    # Cannot find a pretty printer.  Return None.
+    return None
+
+# ToDo: properly document.
+nesting = 0
+
+pp_dict = build_pretty_printer()