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tag: added tag_is_defined() 

tag_is_defined() checks whether there is any information in the tag
object.
This commit is contained in:
Max Kellermann 2009-01-15 22:00:26 +01:00
parent 15435b09af
commit ccea365494
1 changed files with 9 additions and 0 deletions
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9
src/tag.h
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@ -109,6 +109,15 @@ tag_is_empty(const struct tag *tag)
return tag->numOfItems == 0;
}
/**
* 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.