From 7ebb91f69bdcc74cd7f18518c22f379bf416ae99 Mon Sep 17 00:00:00 2001
From: Sebastien Helleu <flashcode@flashtux.org>
Date: Sat, 13 Aug 2011 12:00:25 +0200
Subject: [PATCH] core: add function hashtable_dup (duplicate a hashtable)

---
 src/core/wee-hashtable.c | 49 ++++++++++++++++++++++++++++++++++++++--
 src/core/wee-hashtable.h |  2 ++
 2 files changed, 49 insertions(+), 2 deletions(-)

diff --git a/src/core/wee-hashtable.c b/src/core/wee-hashtable.c
index b84b12272..41349a1bd 100644
--- a/src/core/wee-hashtable.c
+++ b/src/core/wee-hashtable.c
@@ -455,8 +455,53 @@ hashtable_map (struct t_hashtable *hashtable,
 }
 
 /*
- * hashtable_get_list_keys_map_cb: function called for each variable in hdata
- *                                 to build sorted list of keys
+ * hashtable_duplicate_map_cb: function called for each variable in hashtable
+ *                             to duplicate all keys
+ */
+
+void
+hashtable_duplicate_map_cb (void *data,
+                            struct t_hashtable *hashtable,
+                            const void *key, const void *value)
+{
+    struct t_hashtable *hashtable2;
+    
+    /* make C compiler happy */
+    (void) hashtable;
+    
+    hashtable2 = (struct t_hashtable *)data;
+    if (hashtable2)
+        hashtable_set (hashtable2, key, value);
+}
+
+/*
+ * hashtable_dup: duplicate hashtable
+ */
+
+struct t_hashtable *
+hashtable_dup (struct t_hashtable *hashtable)
+{
+    struct t_hashtable *new_hashtable;
+    
+    new_hashtable = hashtable_new (hashtable->size,
+                                   hashtable_type_string[hashtable->type_keys],
+                                   hashtable_type_string[hashtable->type_values],
+                                   hashtable->callback_hash_key,
+                                   hashtable->callback_keycmp);
+    if (new_hashtable)
+    {
+        new_hashtable->callback_free_value = hashtable->callback_free_value;
+        hashtable_map (hashtable,
+                       &hashtable_duplicate_map_cb,
+                       new_hashtable);
+    }
+    
+    return new_hashtable;
+}
+
+/*
+ * hashtable_get_list_keys_map_cb: function called for each variable in
+ *                                 hashtable to build sorted list of keys
  */
 
 void
diff --git a/src/core/wee-hashtable.h b/src/core/wee-hashtable.h
index b11a83429..c4ac29a8b 100644
--- a/src/core/wee-hashtable.h
+++ b/src/core/wee-hashtable.h
@@ -121,6 +121,8 @@ extern int hashtable_has_key (struct t_hashtable *hashtable, const void *key);
 extern void hashtable_map (struct t_hashtable *hashtable,
                            t_hashtable_map *callback_map,
                            void *callback_map_data);
+extern struct t_hashtable *hashtable_dup (struct t_hashtable *hashtable);
+struct t_weelist *hashtable_get_list_keys (struct t_hashtable *hashtable);
 extern int hashtable_get_integer (struct t_hashtable *hashtable,
                                   const char *property);
 extern const char *hashtable_get_string (struct t_hashtable *hashtable,