tag: added tag_is_defined()

tag_is_defined() checks whether there is any information in the tag object.

tag: added tag_is_defined()
ccea3654 · Max Kellermann · 15435b09 · ccea3654
Commit ccea3654 authored Jan 15, 2009 by Max Kellermann
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tag.h src/tag.h +9 -0

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--- 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.
 */