Return the value type for a given attribute.
This can be either TRUE, FALSE, UNSPECIFIED (if the attribute was not set at all), or VALUE, if the attribute was set to an actual string.
If the attribute has a VALUE string, it can be accessed normally as a null-terminated C string.
@param attr The attribute @return the value type for the attribute
See Implementation
Return the value type for a given attribute.
This can be either TRUE, FALSE, UNSPECIFIED (if the attribute was not set at all), or VALUE, if the attribute was set to an actual string.
If the attribute has a VALUE string, it can be accessed normally as a null-terminated C string.
@param attr The attribute @return the value type for the attribute