From 69a8f08f3e7cc0a9121c7fdb3499081fb2e34ddf Mon Sep 17 00:00:00 2001
From: wm4 <wm4@nowhere>
Date: Wed, 16 Jul 2014 22:40:12 +0200
Subject: tags: add copy function

---
 common/tags.c | 13 +++++++++++++
 common/tags.h |  1 +
 2 files changed, 14 insertions(+)

diff --git a/common/tags.c b/common/tags.c
index 03765272df..c722d5d89c 100644
--- a/common/tags.c
+++ b/common/tags.c
@@ -61,6 +61,19 @@ void mp_tags_clear(struct mp_tags *tags)
     talloc_free_children(tags);
 }
 
+struct mp_tags *mp_tags_dup(void *tparent, struct mp_tags *tags)
+{
+    struct mp_tags *new = talloc_zero(tparent, struct mp_tags);
+    MP_RESIZE_ARRAY(new, new->keys,   tags->num_keys);
+    MP_RESIZE_ARRAY(new, new->values, tags->num_keys);
+    new->num_keys = tags->num_keys;
+    for (int n = 0; n < tags->num_keys; n++) {
+        new->keys[n] = talloc_strdup(new, tags->keys[n]);
+        new->values[n] = talloc_strdup(new, tags->values[n]);
+    }
+    return new;
+}
+
 void mp_tags_merge(struct mp_tags *tags, struct mp_tags *src)
 {
     for (int n = 0; n < src->num_keys; n++)
diff --git a/common/tags.h b/common/tags.h
index 4b7bcfa791..375289695f 100644
--- a/common/tags.h
+++ b/common/tags.h
@@ -14,6 +14,7 @@ void mp_tags_set_bstr(struct mp_tags *tags, bstr key, bstr value);
 char *mp_tags_get_str(struct mp_tags *tags, const char *key);
 char *mp_tags_get_bstr(struct mp_tags *tags, bstr key);
 void mp_tags_clear(struct mp_tags *tags);
+struct mp_tags *mp_tags_dup(void *tparent, struct mp_tags *tags);
 void mp_tags_merge(struct mp_tags *tags, struct mp_tags *src);
 struct AVDictionary;
 void mp_tags_copy_from_av_dictionary(struct mp_tags *tags,
-- 
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