[glib] Add pretty printer for hashtables

[Alexander Larsson <alexl src gnome org>]

commit 2b8943237f137f287b0b0854f80198de54fd26ea
Author: Alexander Larsson <alexl redhat com>
Date:   Mon Sep 21 12:26:23 2009 +0200

    Add pretty printer for hashtables

 glib/glib.py |   64 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 64 insertions(+), 0 deletions(-)
---
diff --git a/glib/glib.py b/glib/glib.py
index df000bf..aa71c20 100644
--- a/glib/glib.py
+++ b/glib/glib.py
@@ -69,6 +69,68 @@ class GListPrinter:
     def display_hint (self):
         return "array"
 
+class GHashPrinter:
+    "Prints a GHashTable"
+
+    class _iterator:
+        def __init__(self, ht, keys_are_strings):
+            self.ht = ht
+            if ht != 0:
+                self.array = ht["nodes"]
+                self.size = ht["size"]
+            self.pos = 0
+            self.keys_are_strings = keys_are_strings
+            self.value = None
+
+        def __iter__(self):
+            return self
+
+        def next(self):
+            if self.ht == 0:
+                raise StopIteration
+            if self.value != None:
+                v = self.value
+                self.value = None
+                return v
+            while long(self.pos) < long(self.size):
+                node = self.array[self.pos]
+                self.pos = self.pos + 1
+                if long (node["key_hash"]) >= 2:
+                    key = node["key"]
+                    val = node["value"]
+
+                    if self.keys_are_strings:
+                        key = key.cast (gdb.lookup_type("char").pointer())
+
+                    # Queue value for next result
+                    self.value = ('[%dv]'% (self.pos), val)
+
+                    # Return key
+                    return ('[%dk]'% (self.pos), key)
+            raise StopIteration
+
+    def __init__ (self, val):
+        self.val = val
+        self.keys_are_strings = False
+        try:
+            string_hash = read_global_var ("g_str_hash")
+        except:
+            try:
+                string_hash = read_global_var ("IA__g_str_hash")
+            except:
+                string_hash = None
+        if self.val != 0 and string_hash != None and self.val["hash_func"] == string_hash:
+            self.keys_are_strings = True
+
+    def children(self):
+        return self._iterator(self.val, self.keys_are_strings)
+
+    def to_string (self):
+        return  "0x%x" % (long(self.val))
+
+    def display_hint (self):
+        return "map"
+
 def pretty_printer_lookup (val):
     if is_g_type_instance (val):
         return GTypePrettyPrinter (val)
@@ -89,6 +151,8 @@ def pretty_printer_lookup (val):
             return GListPrinter(val, "GList")
         if t == "GSList":
             return GListPrinter(val, "GSList")
+        if t == "GHashTable":
+            return GHashPrinter(val)
     else:
         t = str(type)
         if t == "GList":