From ba7ad8653e3c5d0eedbe65c4cd92359f5d2308e3 Mon Sep 17 00:00:00 2001
From: Florian Forster <octo@collectd.org>
Date: Wed, 23 Nov 2011 14:28:01 +0100
Subject: [PATCH] src/meta_data.[ch]: Add meta_data_clone().

Change-Id: I8449e27c908cbe75ea4ea3b8dd4df556f9aec9e7
---
 src/meta_data.c | 38 +++++++++++++++++++++++++++++++++++++-
 src/meta_data.h |  3 ++-
 2 files changed, 39 insertions(+), 2 deletions(-)

diff --git a/src/meta_data.c b/src/meta_data.c
index aff3f8e5..b502b377 100644
--- a/src/meta_data.c
+++ b/src/meta_data.c
@@ -1,6 +1,6 @@
 /**
  * collectd - src/meta_data.c
- * Copyright (C) 2008,2009  Florian octo Forster
+ * Copyright (C) 2008-2011  Florian octo Forster
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the
@@ -101,6 +101,24 @@ static meta_entry_t *md_entry_alloc (const char *key) /* {{{ */
   return (e);
 } /* }}} meta_entry_t *md_entry_alloc */
 
+static meta_entry_t *md_entry_clone (const meta_entry_t *orig) /* {{{ */
+{
+  meta_entry_t *copy;
+
+  if (orig == NULL)
+    return (NULL);
+
+  copy = md_entry_alloc (orig->key);
+  copy->type = orig->type;
+  if (copy->type == MD_TYPE_STRING)
+    copy->value.mv_string = strdup (orig->value.mv_string);
+  else
+    copy->value = orig->value;
+
+  copy->next = md_entry_clone (orig->next);
+  return (copy);
+} /* }}} meta_entry_t *md_entry_clone */
+
 static void md_entry_free (meta_entry_t *e) /* {{{ */
 {
   if (e == NULL)
@@ -209,6 +227,24 @@ meta_data_t *meta_data_create (void) /* {{{ */
   return (md);
 } /* }}} meta_data_t *meta_data_create */
 
+meta_data_t *meta_data_clone (meta_data_t *orig) /* {{{ */
+{
+  meta_data_t *copy;
+
+  if (orig == NULL)
+    return (NULL);
+
+  copy = meta_data_create ();
+  if (copy == NULL)
+    return (NULL);
+
+  pthread_mutex_lock (&orig->lock);
+  copy->head = md_entry_clone (orig->head);
+  pthread_mutex_unlock (&orig->lock);
+
+  return (copy);
+} /* }}} meta_data_t *meta_data_clone */
+
 void meta_data_destroy (meta_data_t *md) /* {{{ */
 {
   if (md == NULL)
diff --git a/src/meta_data.h b/src/meta_data.h
index 9ef7b0a8..f1af40ee 100644
--- a/src/meta_data.h
+++ b/src/meta_data.h
@@ -1,6 +1,6 @@
 /**
  * collectd - src/meta_data.h
- * Copyright (C) 2008,2009  Florian octo Forster
+ * Copyright (C) 2008-2011  Florian octo Forster
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the
@@ -37,6 +37,7 @@ struct meta_data_s;
 typedef struct meta_data_s meta_data_t;
 
 meta_data_t *meta_data_create (void);
+meta_data_t *meta_data_clone (meta_data_t *orig);
 void meta_data_destroy (meta_data_t *md);
 
 int meta_data_exists (meta_data_t *md, const char *key);
-- 
2.30.2