Purpose
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Reads the fill value of a data set, if the value has been set.
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Return value
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Returns SUCCEED (or 0) if a fill value is retrieved and FAIL (or -1) otherwise, including when the fill value is not set.
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Description
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SDgetfillvalue reads the fill value which has been set for the data set specified by the parameter sds_id. It is assumed that the data type of the fill value is the same as that of the data set.
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Note that there are two FORTRAN-77 versions of this routine: sfgfill and sfgcfill. The sfgfill routine reads numeric fill value data and sfgcfill reads character fill value data.
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