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Hdf rm anchor
AnchorNamesummary

Excerpt

Sets type conversion and background buffers

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Hdf rm anchor
AnchorNameprocedure

Procedure:
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classhdf_procedure

H5P_SET_BUFFER ( plist, size, tconv, bkg )

Hdf rm anchor
AnchorNamesignature

Signature:
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<pre><code class="language-c">herr_t H5Pset_buffer(hid_t plist,
        hsize_t size,
        void *tconv,
        void *bkg
        )
  </code></pre>
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<pre><code class="language-fortran">Fortran90 Interface: h5pset_buffer_f
    
SUBROUTINE h5pset_buffer_f(plist_id, size, hdferr) 
  IMPLICIT NONE
  INTEGER(HID_T), INTENT(IN)   :: plist_id ! Dataset transfer property 
                                           ! list identifier
  INTEGER(HSIZE_T), INTENT(IN) :: size     ! Conversion buffer size
  INTEGER, INTENT(OUT)         :: hdferr   ! Error code
                                           ! 0 on success and -1 on failure
END SUBROUTINE h5pset_buffer_f
	</code></pre>

Hdf rm anchor
AnchorNameparameters

Parameters:
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hid_t plistIN: Identifier for the dataset transfer property list
hsize_t size    IN: Size, in bytes, of the type conversion and background buffers
void tconvIN: Pointer to application-allocated type conversion buffer
void bkgIN: Pointer to application-allocated background buffer

Hdf rm anchor
AnchorNamedescription

Description:
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Given a dataset transfer property list, H5P_SET_BUFFER sets the maximum size for the type conversion buffer and background buffer and optionally supplies pointers to application-allocated buffers. If the buffer size is smaller than the entire amount of data being transferred between the application and the file, and a type conversion buffer or background buffer is required, then strip mining will be used.

Note that there are minimum size requirements for the buffer. Strip mining can only break the data up along the first dimension, so the buffer must be large enough to accommodate a complete slice that encompasses all of the remaining dimensions. For example, when strip mining a 100x200x300 hyperslab of a simple data space, the buffer must be large enough to hold 1x200x300 data elements. When strip mining a 100x200x300x150 hyperslab of a simple data space, the buffer must be large enough to hold 1x200x300x150 data elements.

If tconv and/or bkg are null pointers, then buffers will be allocated and freed during the data transfer.

The default value for the maximum buffer is 1 Mb.

Hdf rm anchor
AnchorNamereturns

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

Hdf rm anchor
AnchorNameexample

Example:
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filepathexamples/h5_subset.c
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lineStart32
progLangcpp
lineEnd42
applicationLink5ac7b370-7412-3c8c-ad20-807a68261336

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Bitbucket Server file
repoSlughdf5
branchIdrefs/heads/1.10/master
projectKeyHDFFV
filepathfortran/examples/compound.f90
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lineStart25
progLangplain
lineEnd35
applicationLink5ac7b370-7412-3c8c-ad20-807a68261336

Hdf rm anchor
AnchorNamehistory

History:
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Release    Change
1.6.0The size parameter has changed from type hsize_t to size_t.
1.4.0The size parameter has changed to type hsize_t.