Function ion_reader_get_value_length

pub unsafe extern "C" fn ion_reader_get_value_length(
    hreader: hREADER,
    p_length: *mut SIZE,
) -> iERR

returns the length of the value the reader is currently positioned on. This length is appropriate to use later when calling ion_reader_seek to limit “over-reading” in the underlying stream which could result in errors that are not really of interest. NOTE: readers of text data will always set *p_length to -1 because text Ion data is not length-prefixed. When the reader may be reading text Ion data, the correct way to calculate a value’s length is by subtracting the current value’s offset (see ion_reader_get_value_offset) from the next value’s offset. This technique will work for both binary and text Ion data.