philipp/hdf5
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
Files
bedcfc85bde023dab2fec39589f06361457ebbcd
hdf5/doc/html/RM_H5S.html
Frank Baker 85cf3f4bb8 [svn-r777] RM_H5S.html 
Changed H5Sget_space_type to H5Sget_simple_extent_type.
	Changed H5Sget_simple_extent_type FAIL return value to
		H5S_NO_CLASS.

RM_H5F.html
	H5Fflush.  Corrected function name in sytax line, which
		had read H5Fis_hdf.

RM_H5G.html
	Removed discussion of "current working group" and associated
		information from the introductory discussion.
	H5Gset, H5Gpush, H5Gpop
		Removed these functions.
	H5Gunlink, H5Gmove
		Removed the "not yet implemented" notations from
		these functions.
1998-10-22 18:52:02 -05:00

750 lines
28 KiB
HTML
Raw Blame History

<html>
<head><title>
HDF5/H5S Draft API Specification
</title></head>
<body>
<hr>
<center>
<a href="RM_H5Front.html">HDF5 Reference Manual</a>&nbsp;
<a href="RM_H5.html">H5</a>&nbsp;&nbsp;
<a href="RM_H5A.html">H5A</a>&nbsp;&nbsp;
<a href="RM_H5D.html">H5D</a>&nbsp;&nbsp;
<a href="RM_H5E.html">H5E</a>&nbsp;&nbsp;
<a href="RM_H5F.html">H5F</a>&nbsp;&nbsp;
<a href="RM_H5G.html">H5G</a>&nbsp;&nbsp;
<a href="RM_H5P.html">H5P</a>&nbsp;&nbsp;
H5S&nbsp;&nbsp;
<a href="RM_H5T.html">H5T</a>&nbsp;&nbsp;
<a href="RM_H5Z.html">H5Z</a>&nbsp;&nbsp;
<a href="Tools.html">Tools</a>&nbsp;&nbsp;
<!--
<a href="Glossary.html">Glossary</a>
-->
</center>
<hr>
<center>
<h1>H5S: Dataspace Interface</h1>
</center>
<h2>Dataspace Object API Functions</h2>
These functions create and manipulate the dataspace in which to store the
elements of a dataset.
<table border=0>
<tr><td valign=top>
<ul>
<li><a href="#Dataspace-Create">H5Screate</a>
<li><a href="#Dataspace-CreateSimple">H5Screate_simple</a>
<li><a href="#Dataspace-IsSimple">H5Sis_simple</a>
<li><a href="#Dataspace-OffsetSimple">H5Soffset_simple</a>
<li><a href="#Dataspace-Copy">H5Scopy</a>
<li><a href="#Dataspace-ExtentClass">H5Sextent_class</a>
<li><a href="#Dataspace-ExtentCopy">H5Sextent_copy</a>
</ul>
</td><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td valign=top>
<ul>
<li><a href="#Dataspace-SetExtentSimple">H5Sset_extent_simple</a>
<li><a href="#Dataspace-SetExtentNone">H5Sset_extent_none</a>
<li><a href="#Dataspace-SelectNpoints">H5Sget_select_npoints</a>
<li><a href="#Dataspace-ExtentDims">H5Sget_simple_extent_dims</a>
<li><a href="#Dataspace-ExtentNdims">H5Sget_simple_extent_ndims</a>
<li><a href="#Dataspace-ExtentNpoints">H5Sget_simple_extent_npoints</a>
<li><a href="#Dataspace-ExtentType">H5Sget_simple_extent_type</a>
</ul>
</td><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td valign=top>
<ul>
<li><a href="#Dataspace-SelectElements">H5Sselect_elements</a>
<li><a href="#Dataspace-SelectAll">H5Sselect_all</a>
<li><a href="#Dataspace-SelectNone">H5Sselect_none</a>
<li><a href="#Dataspace-SelectValid">H5Sselect_valid</a>
<li><a href="#Dataspace-SelectHyperslab">H5Sselect_hyperslab</a>
<li><a href="#Dataspace-Close">H5Sclose</a>
</ul>
</td></tr>
</table>
<p>
The following H5S functions are included in the HDF5 specification,
but have not yet been implemented. They are described in the
<a href="Dataspaces.html">The Dataspace Interface (H5S)</a> section
of the <cite>HDF5 User's Guide.</cite>.
<table border=0>
<tr><td valign=top>
<ul>
<li>H5Scommit
<li>H5Sis_subspace
<li>H5Slock
<li>H5Sopen
</ul>
</td><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td valign=top>
<ul>
<li>H5Sselect_name
<li>H5Sselect_op
<li>H5Sselect_order
</ul>
</td><td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td><td valign=top>
<ul>
<li>H5Ssubspace
<li>H5Ssubspace_name
<li>H5Ssubspace_location
</ul>
</td></tr>
</table>
<hr>
<dl>
<dt><strong>Name:</strong> <a name="Dataspace-Create">H5Screate</a>
<dt><strong>Signature:</strong>
<dd><em>hid_t</em> <code>H5Screate</code>(<em>H5S_class_t</em> <code>type</code>)
<dt><strong>Purpose:</strong>
<dd>Creates a new dataspace of a specified type.
<dt><strong>Description:</strong>
<dd><code>H5Screate</code> creates a new dataspace of a particular
<code>type</code>.
The types currently supported are <code>H5S_SCALAR</code>,
<code>H5S_SIMPLE</code>, and <code>H5S_NONE</code>;
others are planned to be added later. The <code>H5S_NONE</code>
dataspace can only hold a selection, not an extent.
<dt><strong>Parameters:</strong>
<dl>
<dt><em>H5S_class_t</em> <code>type</code>
<dd>The type of dataspace to be created.
</dl>
<dt><strong>Returns:</strong>
<dd>Returns a dataspace identifier if successful;
otherwise FAIL (-1).
</dl>
<hr>
<dl>
<dt><strong>Name:</strong> <a name="Dataspace-CreateSimple">H5Screate_simple</a>
<dt><strong>Signature:</strong>
<dd><em>hid_t</em> <code>H5Screate_simple</code>(<em>int</em> <code>rank</code>,
<em>const hsize_t *</em> <code>dims</code>,
<em>const hsize_t *</em> <code>maxdims</code>
)
<dt><strong>Purpose:</strong>
<dd>Creates a new simple data space and opens it for access.
<dt><strong>Description:</strong>
<dd><code>H5Screate_simple</code> creates a new simple data space
and opens it for access. The <code>rank</code> is the number of
dimensions used in the dataspace.
The <code>dims</code> argument is the size
of the simple dataset and the <code>maxdims</code> argument is
the upper limit on the size of the dataset. <code>maxdims</code>
may be the null pointer in which case the upper limit is the
same as <code>dims</code>. If an element of <code>maxdims</code>
is zero then the corresponding dimension is unlimited, otherwise
no element of <code>maxdims</code> should be smaller than the
corresponding element of <code>dims</code>. The dataspace
identifier returned from this function should be released with
<code>H5Sclose</code> or resource leaks will occur.
<dt><strong>Parameters:</strong>
<dl>
<dt><em>int</em> <code>rank</code>
<dd>Number of dimensions of dataspace.
<dt><em>const hsize_t *</em> <code>dims</code>
<dd>An array of the size of each dimension.
<dt><em>const hsize_t *</em> <code>maxdims</code>
<dd>An array of the maximum size of each dimension.
</dl>
<dt><strong>Returns:</strong>
<dd>Returns a dataspace identifier if successful;
otherwise FAIL (-1).
</dl>
<hr>
<dl>
<dt><strong>Name:</strong> <a name="Dataspace-Copy">H5Scopy</a>
<dt><strong>Signature:</strong>
<dd><em>hid_t </em><code>H5Scopy</code>(<em>hid_t </em><code>space_id</code>
)
<dt><strong>Purpose:</strong>
<dd>Creates an exact copy of a dataspace.
<dt><strong>Description:</strong>
<dd><code>H5Scopy</code> creates a new dataspace which is an exact
copy of the dataspace identified by <code>space_id</code>.
The dataspace identifier returned from this function should be
released with <code>H5Sclose</code> or resource leaks will occur.
<dt><strong>Parameters:</strong>
<dl>
<dt><em>hid_t</em> <code>space_id</code>
<dd>Identifier of dataspace to copy.
</dl>
<dt><strong>Returns:</strong>
<dd>Returns a dataspace identifier if successful;
otherwise FAIL (-1).
</dl>
<hr>
<dl>
<dt><strong>Name:</strong> <a name="Dataspace-SelectElements">H5Sselect_elements</a>
<dt><strong>Signature:</strong>
<dd><em>herr_t</em> <code>H5Sselect_elements</code>(<em>hid_t </em><code>space_id</code>,
<em>dh5s_selopt_t</em> <code>op</code>,
<em>const size_t</em> <code>num_elements</code>,
<em>const hssize_t *</em><code>coord</code>[ ]
)
<dt><strong>Purpose:</strong>
<dd>Selects array elements to be included in the selection for a dataspace.
<dt><strong>Description:</strong>
<dd><code>H5Sselect_elements</code> selects array elements to be
included in the selection for the <code>space_id</code>
dataspace. The number of elements selected must be set with
the <code>num_elements</code>. The <code>coord</code> array
is a two-dimensional array of size <em>dataspace rank</em>
by <code>num_elements</code> (ie. a list of coordinates in
the array). The order of the element coordinates in the
<code>coord</code> array also specifies the order in which
the array elements are iterated through when I/O is performed.
Duplicate coordinate locations are not checked for.
<P>
The selection operator <code>op</code> determines how the
new selection is to be combined with the previously existing
selection for the dataspace. Currently, only the
<code>H5S_SELECT_SET</code> operator is supported, which
replaces the existing selection with the parameters from
this call. When operators other than <code>H5S_SELECT_SET</code>
are used to combine a new selection with an existing selection,
the selection ordering is reset to 'C' array ordering.
<dt><strong>Parameters:</strong>
<dl>
<dt><em>hid_t</em> <code>space_id</code>
<dd>Identifier of the dataspace.
<dt><em>dh5s_selopt_t</em> <code>op</code>
<dd>operator specifying how the new selection is to be
combined with the existing selection for the dataspace.
<dt><em>const size_t</em> <code>num_elements</code>
<dd>Number of elements to be selected.
<dt><em>const hssize_t *</em><code>coord</code>[ ]
<dd>A 2-dimensional array specifying the coordinates of the
elements being selected.
</dl>
<dt><strong>Returns:</strong>
<dd>Returns SUCCEED (0) if successful;
otherwise FAIL (-1).
</dl>
<hr>
<dl>
<dt><strong>Name:</strong> <a name="Dataspace-SelectAll">H5Sselect_all</a>
<dt><strong>Signature:</strong>
<dd><em>herr_t</em> <code>H5Sselect_all</code>(<em>hid_t</em> <code>space_id</code>)
<dt><strong>Purpose:</strong>
<dd>Selects the entire dataspace.
<dt><strong>Description:</strong>
<dd><code>H5Sselect_all</code> selects the entire extent
of the dataspace <code>space_id</code>.
<p>
More specifically, <code>H5Sselect_all</code> selects
the special <tt>5S_SELECT_ALL</tt> region for the dataspace
<code>space_id</code>. <tt>H5S_SELECT_ALL</tt> selects the
entire dataspace for any dataspace it is applied to.
<dt><strong>Parameters:</strong>
<dl>
<dt><em>hid_t</em> <code>space_id</code>
<dd>IN: The identifier for the dataspace in which the
selection is being made.
</dl>
<dt><strong>Returns:</strong>
<dd>Returns SUCCEED (0) if successful;
otherwise FAIL (-1).
</dl>
<hr>
<dl>
<dt><strong>Name:</strong> <a name="Dataspace-SelectNone">H5Sselect_none</a>
<dt><strong>Signature:</strong>
<dd><em>herr_t</em> <code>H5Sselect_none</code>(<em>hid_t</em> <code>space_id</code>)
<dt><strong>Purpose:</strong>
<dd>Resets the selection region to include no elements.
<dt><strong>Description:</strong>
<dd><code>H5Sselect_none</code> resets the selection region
for the dataspace <code>space_id</code> to include no elements.
<dt><strong>Parameters:</strong>
<dl>
<dt><em>hid_t</em> <code>space_id</code>
<dd>IN: The identifier for the dataspace in which the
selection is being reset.
</dl>
<dt><strong>Returns:</strong>
<dd>Returns SUCCEED (0) if successful;
otherwise FAIL (-1).
</dl>
<hr>
<dl>
<dt><strong>Name:</strong> <a name="Dataspace-SelectValid">H5Sselect_valid</a>
<dt><strong>Signature:</strong>
<dd><em>hbool_t</em> <code>H5Sselect_valid</code>(<em>hid_t</em> <code>space_id</code>)
<dt><strong>Purpose:</strong>
<dd>Verifies that the selection is within the extent of the dataspace.
<dt><strong>Description:</strong>
<dd><code>H5Sselect_valid</code> verifies that the selection
for the dataspace <code>space_id</code> is within the extent
of the dataspace if the current offset for the dataspace is used.
<dt><strong>Parameters:</strong>
<dl>
<dt><em>hid_t</em> <code>space_id</code>
<dd>The identifier for the dataspace in which the
selection is being reset.
</dl>
<dt><strong>Returns:</strong>
<dd>Returns <tt>TRUE</tt> if the selection is contained within
the extent and <tt>FALSE</tt> if it is not.
Returns <tt>FAIL</tt> (<tt>-1</tt>) on error conditions
such as the selection or extent not being defined.
</dl>
<hr>
<dl>
<dt><strong>Name:</strong> <a name="Dataspace-ExtentNpoints">H5Sget_simple_extent_npoints</a>
<dt><strong>Signature:</strong>
<dd><em>hsize_t</em> <code>H5Sget_simple_extent_npoints</code>(<em>hid_t </em><code>space_id</code>)
<dt><strong>Purpose:</strong>
<dd>Determines the number of elements in a dataspace.
<dt><strong>Description:</strong>
<dd><code>H5Sget_simple_extent_npoints</code> determines the number of elements
in a dataspace. For example, a simple 3-dimensional dataspace
with dimensions 2, 3, and 4 would have 24 elements.
<dt><strong>Parameters:</strong>
<dl>
<dt><em>hid_t</em> <code>space_id</code>
<dd>ID of the dataspace object to query
</dl>
<dt><strong>Returns:</strong>
<dd>Returns the number of elements in the dataspace if successful;
otherwise returns 0.
</dl>
<hr>
<dl>
<dt><strong>Name:</strong> <a name="Dataspace-SelectNpoints">H5Sget_select_npoints</a>
<dt><strong>Signature:</strong>
<dd><em>hsize_t</em> <code>H5Sget_select_npoints</code>(<em>hid_t</em> <code>space_id</code>)
<dt><strong>Purpose:</strong>
<dd>Determines the number of elements in a dataspace.
<dt><strong>Description:</strong>
<dd><code>H5Sget_select_npoints</code> determines the number of elements
in the current selection of a dataspace.
<dt><strong>Parameters:</strong>
<dl>
<dt><em>hid_t</em> <code>space_id</code>
<dd>Dataspace identifier.
</dl>
<dt><strong>Returns:</strong>
<dd>Returns the number of elements in the selection if successful;
otherwise FAIL (-1).
</dl>
<hr>
<dl>
<dt><strong>Name:</strong> <a name="Dataspace-ExtentNdims">H5Sget_simple_extent_ndims</a>
<dt><strong>Signature:</strong>
<dd><em>int</em> <code>H5Sget_simple_extent_ndims</code>(<em>hid_t</em> <code>space_id</code>)
<dt><strong>Purpose:</strong>
<dd>Determines the dimensionality of a dataspace.
<dt><strong>Description:</strong>
<dd><code>H5Sget_simple_extent_ndims</code> determines the dimensionality (or rank)
of a dataspace.
<dt><strong>Parameters:</strong>
<dl>
<dt><em>hid_t</em> <code>space_id</code>
<dd>Identifier of the dataspace
</dl>
<dt><strong>Returns:</strong>
<dd>Returns the number of dimensions in the dataspace if successful;
otherwise FAIL (-1)
</dl>
<hr>
<dl>
<dt><strong>Name:</strong> <a name="Dataspace-ExtentDims">H5Sget_simple_extent_dims</a>
<dt><strong>Signature:</strong>
<dd><em>int</em> <code>H5Sget_simple_extent_dims</code>(<em>hid_t</em> <code>space_id</code>,
<em>hsize_t *</em><code>dims</code>,
<em>hsize_t *</em><code>maxdims</code>
)
<dt><strong>Purpose:</strong>
<dd>Retrieves dataspace dimension size and maximum size.
<dt><strong>Description:</strong>
<dd><code>H5Sget_simple_extent_dims</code> returns the size and maximum sizes
of each dimension of a dataspace through the <code>dims</code>
and <code>maxdims</code> parameters.
<dt><strong>Parameters:</strong>
<dl>
<dt><em>hid_t</em> <code>space_id</code>
<dd>IN: Identifier of the dataspace object to query
<dt><em>hsize_t *</em><code>dims</code>
<dd>OUT: Pointer to array to store the size of each dimension.
<dt><em>hsize_t *</em><code>maxdims</code>
<dd>OUT: Pointer to array to store the maximum size of each dimension.
</dl>
<dt><strong>Returns:</strong>
<dd>Returns the number of dimensions in the dataspace if successful;
otherwise FAIL (-1).
</dl>
<hr>
<dl>
<dt><strong>Name:</strong> <a name="Dataspace-ExtentType">H5Sget_simple_extent_type</a>
<dt><strong>Signature:</strong>
<dd><em>H5S_class_t</em> <code>H5Sget_simple_extent_type</code>(<em>hid_t</em> <code>space_id</code>)
<dt><strong>Purpose:</strong>
<dd>Determine the current class of a dataspace.
<dt><strong>Description:</strong>
<dd><code>H5Sget_simple_extent_type</code> queries a dataspace to determine the
current class of a dataspace.
<p>
The function returns a class name, one of the following:
<code>H5S_SCALAR</code>,
<code>H5S_SIMPLE</code>, or
<code>H5S_NONE</code>.
<dt><strong>Parameters:</strong>
<dl>
<dt><em>hid_t</em> <code>space_id</code>
<dd>Dataspace identifier.
</dl>
<dt><strong>Returns:</strong>
<dd>Returns a dataspace class name if successful;
otherwise H5S_NO_CLASS (-1).
</dl>
<hr>
<dl>
<dt><strong>Name:</strong> <a name="Dataspace-SetExtentSimple">H5Sset_extent_simple</a>
<dt><strong>Signature:</strong>
<dd><em>herr_t</em> <code>H5Sset_extent_simple</code>(<em>hid_t</em> <code>space_id</code>,
<em>int</em> <code>rank</code>,
<em>const hsize_t *</em><code>current_size</code>,
<em>const hsize_t *</em><code>maximum_size</code>
)
<dt><strong>Purpose:</strong>
<dd>Sets or resets the size of an existing dataspace.
<dt><strong>Description:</strong>
<dd><code>H5Sset_extent_simple</code> sets or resets the size of
an existing dataspace.
<p>
<code>rank</code> is the dimensionality, or number of
dimensions, of the dataspace.
<p>
<code>current_size</code> is an array of size <code>rank</code>
which contains the new size of each dimension in the dataspace.
<code>maximum_size</code> is an array of size <code>rank</code>
which contains the maximum size of each dimension in the
dataspace.
<p>
Any previous extent is removed from the dataspace, the dataspace
type is set to <code>H5S_SIMPLE</code>, and the extent is set as
specified.
<dt><strong>Parameters:</strong>
<dl>
<dt><em>hid_t</em> <code>space_id</code>
<dd>Dataspace identifier.
<dt><em>int</em> <code>rank</code>
<dd>Rank, or dimensionality, of the dataspace.
<dt><em>const hsize_t *</em><code>current_size</code>
<dd>Array containing current size of dataspace.
<dt><em>const hsize_t *</em><code>maximum_size</code>
<dd>Array containing maximum size of dataspace.
</dl>
<dt><strong>Returns:</strong>
<dd>Returns a dataspace identifier if successful;
otherwise FAIL (-1).
</dl>
<hr>
<dl>
<dt><strong>Name:</strong> <a name="Dataspace-IsSimple">H5Sis_simple</a>
<dt><strong>Signature:</strong>
<dd><em>hbool_t </em><code>H5Sis_simple</code>(<em>hid_t </em><code>space_id</code>)
<dt><strong>Purpose:</strong>
<dd>Determines whether a dataspace is a simple dataspace.
<dt><strong>Description:</strong>
<dd><code>H5Sis_simple</code> determines whether a dataspace is
a simple dataspace. [Currently, all dataspace objects are simple
dataspaces, complex dataspace support will be added in the future]
<dt><strong>Parameters:</strong>
<dl>
<dt><em>hid_t</em> <code>space_id</code>
<dd>Identifier of the dataspace to query
</dl>
<dt><strong>Returns:</strong>
<dd>Returns TRUE or FALSE if Successful;
otherwise FAIL (-1).
</dl>
<hr>
<dl>
<dt><strong>Name:</strong> <a name="Dataspace-OffsetSimple">H5Soffset_simple</a>
<dt><strong>Signature:</strong>
<dd><em>herr_t</em> <code>H5Soffset_simple</code>(<em>hid_t</em> <code>space_id</code>,
<em>const hssize_t *</em><code>offset</code>
)
<dt><strong>Purpose:</strong>
<dd>Sets the offset of a simple dataspace.
<dt><strong>Description:</strong>
<dd><code>H5Soffset_simple</code> sets the offset of a
simple dataspace <code>space_id</code>. The <code>offset</code>
array must be the same number of elements as the number of
dimensions for the dataspace. If the <code>offset</code>
array is set to <TT>NULL</TT>, the offset for the dataspace
is reset to 0.
<p>
This function allows the same shaped selection to be moved
to different locations within a dataspace without requiring it
to be redefined.
<dt><strong>Parameters:</strong>
<dl>
<dt><em>hid_t</em> <code>space_id</code>
<dd>IN: The identifier for the dataspace object to reset.
<dt><em>const hssize_t *</em><code>offset</code>
<dd>IN: The offset at which to position the selection.
</dl>
<dt><strong>Returns:</strong>
<dd>Returns SUCCEED (0) if successful;
otherwise FAIL (-1).
</dl>
<hr>
<dl>
<dt><strong>Name:</strong> <a name="Dataspace-ExtentClass">H5Sextent_class</a>
<dt><strong>Signature:</strong>
<dd><em>H5S_class_t</em> <code>H5Sextent_class</code>(<em>hid_t</em> <code>space_id</code>)
<dt><strong>Purpose:</strong>
<dd>Determine the current class of a dataspace.
<dt><strong>Description:</strong>
<dd><code>H5Sextent_class</code> queries a dataspace to determine the
current class of a dataspace.
<p>
The function returns a class name, one of the following:
<code>H5S_SCALAR</code>,
<code>H5S_SIMPLE</code>.
<dt><strong>Parameters:</strong>
<dl>
<dt><em>hid_t</em> <code>space_id</code>
<dd>Dataspace identifier.
</dl>
<dt><strong>Returns:</strong>
<dd>Returns a dataspace class name if successful;
otherwise H5S_NO_CLASS (-1).
</dl>
<hr>
<dl>
<dt><strong>Name:</strong> <a name="Dataspace-ExtentCopy">H5Sextent_copy</a>
<dt><strong>Signature:</strong>
<dd><em>herr_t</em> <code>H5Sextent_copy</code>(<em>hid_t</em> <code>dest_space_id</code>,
<em>hid_t</em> <code>source_space_id</code>
)
<dt><strong>Purpose:</strong>
<dd>Copies the extent of a dataspace.
<dt><strong>Description:</strong>
<dd><code>H5Sextent_copy</code> copies the extent from
<code>source_space_id</code> to <code>dest_space_id</code>.
This action may change the type of the dataspace.
<dt><strong>Parameters:</strong>
<dl>
<dt><em>hid_t</em> <code>dest_space_id</code>
<dd>IN: The identifier for the dataspace from which
the extent is copied.
<dt><em>hid_t</em> <code>source_space_id</code>
<dd>IN: The identifier for the dataspace to which
the extent is copied.
</dl>
<dt><strong>Returns:</strong>
<dd>Returns SUCCEED (0) if successful;
otherwise FAIL (-1).
</dl>
<hr>
<dl>
<dt><strong>Name:</strong> <a name="Dataspace-SetExtentNone">H5Sset_extent_none</a>
<dt><strong>Signature:</strong>
<dd><em>herr_t</em> <code>H5Sset_extent_none</code>(<em>hid_t</em> <code>space_id</code>)
<dt><strong>Purpose:</strong>
<dd>Removes the extent from a dataspace.
<dt><strong>Description:</strong>
<dd><code>H5Sset_extent_none</code> removes the extent from
a dataspace and sets the type to <tt>H5S_NONE</tt>.
<dt><strong>Parameters:</strong>
<dl>
<dt><em>hid_t</em> <code>space_id</code>
<dd>The identifier for the dataspace from which
the extent is to be removed.
</dl>
<dt><strong>Returns:</strong>
<dd>Returns SUCCEED (0) if successful;
otherwise FAIL (-1).
</dl>
<hr>
<dl>
<dt><strong>Name:</strong> <a name="Dataspace-SelectHyperslab">H5Sselect_hyperslab</a>
<dt><strong>Signature:</strong>
<dd><em>herr_t</em> <code>H5Sselect_hyperslab</code>(<em>hid_t</em> <code>space_id</code>,
<em>h5s_selopt_t</em><code>op</code>,
<em>const hssize_t *</em><code>start</code>,
<em>const hsize_t *</em><code>stride</code>
<em>const hsize_t *</em><code>count</code>,
<em>const hsize_t *</em><code>block</code>
)
<dt><strong>Purpose:</strong>
<dd>Selects a hyperslab region to add to the current selected region.
<dt><strong>Description:</strong>
<dd><code>H5Sselect_hyperslab</code> selects a hyperslab region
to add to the current selected region for the dataspace
specified by <code>space_id</code>.
<p>
The <code>start</code>, <code>stride</code>, <code>count</code>,
and <code>block</code> arrays must be the same size as the rank
of the dataspace.
<p>
The selection operator <code>op</code> determines how the new
selection is to be combined with the already existing selection
for the dataspace.
<p>
Currently, only the <code>H5S_SELECT_SET</code> operator is
supported; it replaces the existing selection with the
parameters from this call. Overlapping blocks are not
supported with the <code>H5S_SELECT_SET</code> operator.
<P>
The <code>start</code> array determines the starting coordinates
of the hyperslab
to select.
<p>
The <code>stride</code> array chooses array locations
from the dataspace
with each value in the <code>stride</code> array determining how
many elements to move
in each dimension. Setting a value in the <code>stride</code>
array to 1 moves to
each element in that dimension of the dataspace; setting a value of 2 in a
location in the <code>stride</code> array moves to every other
element in that
dimension of the dataspace. In other words, the <code>stride</code>
determines the
number of elements to move from the <code>start</code> location
in each dimension.
Stride values of 0 are not allowed. If the <code>stride</code>
parameter is <code>NULL</code>,
a contiguous hyperslab is selected (as if each value in the
<code>stride</code> array
was set to all 1's).
<p>
The <code>count</code> array determines how many blocks to
select from the dataspace, in each dimension.
<p>
The <code>block</code> array determines
the size of the element block selected from the dataspace.
If the <code>block</code>
parameter is set to <code>NULL</code>, the block size defaults
to a single element
in each dimension (as if the <code>block</code> array was set to all 1's).
<P>
For example, in a 2-dimensional dataspace, setting
<code>start</code> to [1,1],
<code>stride</code> to [4,4], <code>count</code> to [3,7], and
<code>block</code> to [2,2] selects
21 2x2 blocks of array elements starting with location (1,1) and selecting
blocks at locations (1,1), (5,1), (9,1), (1,5), (5,5), etc.
<P>
Regions selected with this function call default to C order iteration when
I/O is performed.
<dt><strong>Parameters:</strong>
<dl>
<dt><em>hid_t</em> <code>space_id</code>
<dd>IN: Identifier of dataspace selection to modify
<dt><em>H5S_seloper_t</em> <code>op</code>
<dd>IN: Operation to perform on current selection.
<dt><em>const hssize_t *</em><code>start</code>
<dd>IN: Offset of start of hyperslab
<dt><em>const hsize_t *</em><code>count</code>
<dd>IN: Number of blocks included in hyperslab.
<dt><em>const hsize_t *</em><code>stride</code>
<dd>IN: Hyperslab stride.
<dt><em>const hsize_t *</em><code>block</code>
<dd>IN: Size of block in hyperslab.
</dl>
<dt><strong>Returns:</strong>
<dd>Returns SUCCEED (0) if successful;
otherwise FAIL (-1).
</dl>
<hr>
<dl>
<dt><strong>Name:</strong> <a name="Dataspace-Close">H5Sclose</a>
<dt><strong>Signature:</strong>
<dd><em>herr_t </em><code>H5Sclose</code>(<em>hid_t </em><code>space_id</code>
)
<dt><strong>Purpose:</strong>
<dd>Releases and terminates access to a dataspace.
<dt><strong>Description:</strong>
<dd><code>H5Sclose</code> releases a dataspace.
Further access through the dataspace identifier is illegal.
Failure to release a dataspace with this call will
result in resource leaks.
<dt><strong>Parameters:</strong>
<dl>
<dt><em>hid_t</em> <code>space_id</code>
<dd>Identifier of dataspace to release.
</dl>
<dt><strong>Returns:</strong>
<dd>Returns SUCCEED (0) if successful;
otherwise FAIL (-1).
</dl>
<hr>
<center>
<a href="RM_H5Front.html">HDF5 Reference Manual</a>&nbsp;
<a href="RM_H5.html">H5</a>&nbsp;&nbsp;
<a href="RM_H5A.html">H5A</a>&nbsp;&nbsp;
<a href="RM_H5D.html">H5D</a>&nbsp;&nbsp;
<a href="RM_H5E.html">H5E</a>&nbsp;&nbsp;
<a href="RM_H5F.html">H5F</a>&nbsp;&nbsp;
<a href="RM_H5G.html">H5G</a>&nbsp;&nbsp;
<a href="RM_H5P.html">H5P</a>&nbsp;&nbsp;
H5S&nbsp;&nbsp;
<a href="RM_H5T.html">H5T</a>&nbsp;&nbsp;
<a href="RM_H5Z.html">H5Z</a>&nbsp;&nbsp;
<a href="Tools.html">Tools</a>&nbsp;&nbsp;
<!--
<a href="Glossary.html">Glossary</a>
-->
</center>
<hr>
<address>
<a href="mailto:hdfhelp@ncsa.uiuc.edu">HDF Help Desk</a>
<br>
Last modified: 1 September 1998
</body>
</html>
Reference in New Issue View Git Blame Copy Permalink