@param idx The index
@param l_meta Pointer to where the length of the extra data is stored
@return Pointer to the extra data if present; NULL otherwise
Indexes (both .tbi and .csi) made by tabix include extra data about
the indexed file. The returns a pointer to this data. Note that the
data is stored exactly as it is in the index. Callers need to interpret
the results themselves, including knowing what sort of data to expect;
byte swapping etc.
@param idx The index @param l_meta Pointer to where the length of the extra data is stored @return Pointer to the extra data if present; NULL otherwise
Indexes (both .tbi and .csi) made by tabix include extra data about the indexed file. The returns a pointer to this data. Note that the data is stored exactly as it is in the index. Callers need to interpret the results themselves, including knowing what sort of data to expect; byte swapping etc.