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SDwritechunk

intn SDwritechunk(int32 sds_id, int32 *origin, VOIDP datap)
sds_id

IN:

SD interface identifier returned from SDstart

origin

IN:

Origin of the chunk to be written

datap

IN:

Buffer for the chunk data to be written

Purpose

Writes data to a chunked scientific dataset.

Return value

Returns SUCCEED (or 0) if successful and FAIL (or -1) otherwise.

Description

SDwritechunk is used when an entire chunk of data is to be written. SDwritedata is used when the write operation is to be done regardless of the chunking scheme used in the SDS.

Also, SDwritechunk is written specifically for chunked SDSs and doesn't have the overhead of the additional functionality supported by the SDwritedata routine - therefore, it is much faster than SDwritedata.

SDwritechunk will return FAIL when an attempt is made to use it to write to a non-chunked SDS.



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HDF User's Reference Manual, Draft 06/09/97, NCSA HDF Development Group.