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Appends data to a dataset along a specified dimension


H5DO_APPEND (dset_id, dxpl_id, index, num_elem, memtype, buffer)


herr_t H5DOappend( hid_t dset_id, hid_t dxpl_id, unsigned index, size_t num_elem, hid_t memtype, const void *buffer )

hid_t dset_idIN: Dataset identifier
hid_t dxpl_idIN: Dataset transfer property list identifier
unsigned indexIN: Dimension number (0-based)
size_t num_elem   IN: Number of elements to add along the dimension
hid_t memtypeIN: Memory type identifier
void *bufferIN: Data buffer


The H5DO_APPEND routine extends a dataset by num_elem number of elements along a dimension specified by a dimension index and writes buffer of elements to the dataset. Dimension index is 0-based. Elements’ type is described by memtype.

This routine combines calling H5Dset_extent, H5Sselect_hyperslab, and H5Dwrite into a single routine that simplifies application development for the common case of appending elements to an existing dataset.

For a multi-dimensional dataset, appending to one dimension will write a contiguous hyperslab over the other dimensions. For example, if a 3-D dataset has dimension sizes (3, 5, 8), extending the 0th dimension (currently of size 3) by 3 will append 3*5*8 = 120 elements (which must be pointed to by the buffer parameter) to the dataset, making its final dimension sizes (6, 5, 8).

If a dataset has more than one unlimited dimension, any of those dimensions may be appended to, although only along one dimension per call to H5DO_APPEND.


Returns a non-negative value if successful; otherwise returns a negative value.


Coming Soon!

Release    Change
1.10.0C function introduced with this release.

--- Last Modified: March 22, 2018 | 11:55 AM