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-rw-r--r--src/tag.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/src/tag.h b/src/tag.h
index 2347801e3..0c525b24b 100644
--- a/src/tag.h
+++ b/src/tag.h
@@ -110,6 +110,15 @@ tag_is_empty(const struct tag *tag)
}
/**
+ * Returns true if the tag contains any information.
+ */
+static inline bool
+tag_is_defined(const struct tag *tag)
+{
+ return !tag_is_empty(tag) || tag->time >= 0;
+}
+
+/**
* Returns the first value of the specified tag type, or NULL if none
* is present in this tag object.
*/