82fb21b613
been checked into "HDF5 Development" branch. General ======= Various "copy edit" types of repairs. Revisions to document cross-linking. Added structural links tying all docs together (banners at top and bottom of documents, similar to Reference Manual banners of the Beta release). Set background color to white in all documents. NCSAfooterlogo.gif hdf2.jpg New image files to make the documents more self-contained (i.e., to prevent loading images from NCSA and HDF home servers). index.html Redesigned to isolate links external to the installation in a single location. Intro to HDF5 ============= H5.intro.html Fixed banner linking Intro to other docs. Set all URLs to be relative within the distribution; nothing points back to the HDF server. Updates to "Limits of the Current Release" and "Changes in the Current Release." HDF5 User's Guide ================= Changed several User Guide section titles such that all sections that are primarily about a particular interface are now titled in the format "The xxxxx Interface (H5x)". H5.user.html Commented out links to developer docs since they are marked in MANIFEST as not being for distribution in the release. Removed 2nd and 3rd indices from page. Changed "freeform" lists of sections (TOCs) to aligned tables. Datatypes.html Removed the sentence "I'm deferring definition until later since they're probably not as important as the other data types." from Section 3.3, "Properties of Date and Time Atomic Types." Added info regarding 'char' versus 'string' datatypes. Added as Section 3.7, "Character and String Datatype Issues." References.html Commented out substantial material (at end of document) from References planning document that is not appropriate for the User Guide but that is worth keeping around. Groups.html Final edits from elimination of "current working group." HDF5 Reference Manual ===================== Removed "Draft" from the <title>__</title> lines. RM_H5Front.html Removed 2nd and 3rd indices from page. Changed "freeform" lists of sections (TOCs) to aligned tables. RM_H5F.html RM_H5P.html Add file mounting information.
240 lines
7.7 KiB
HTML
240 lines
7.7 KiB
HTML
<html>
|
|
<head><title>
|
|
HDF5/H5R API Specification
|
|
</title></head>
|
|
|
|
<body bgcolor="#FFFFFF">
|
|
|
|
|
|
<hr>
|
|
<center>
|
|
<table border=0 width=98%>
|
|
<tr><td valign=top align=left>
|
|
<a href="H5.intro.html">Introduction to HDF5</a> <br>
|
|
<a href="H5.user.html">HDF5 User Guide</a> <br>
|
|
<a href="index.html">Other HDF5 documents and links</a> <br>
|
|
<!--
|
|
<a href="Glossary.html">Glossary</a><br>
|
|
-->
|
|
</td>
|
|
<td valign=top align=right>
|
|
And in this document, the
|
|
<a href="RM_H5Front.html">HDF5 Reference Manual</a>
|
|
<br>
|
|
<a href="RM_H5.html">H5</a>
|
|
<a href="RM_H5A.html">H5A</a>
|
|
<a href="RM_H5D.html">H5D</a>
|
|
<a href="RM_H5E.html">H5E</a>
|
|
<a href="RM_H5F.html">H5F</a>
|
|
<a href="RM_H5G.html">H5G</a>
|
|
<a href="RM_H5I.html">H5I</a>
|
|
<br>
|
|
<a href="RM_H5P.html">H5P</a>
|
|
H5R
|
|
<a href="RM_H5RA.html">H5RA</a>
|
|
<a href="RM_H5S.html">H5S</a>
|
|
<a href="RM_H5T.html">H5T</a>
|
|
<a href="RM_H5Z.html">H5Z</a>
|
|
<a href="Tools.html">Tools</a>
|
|
</td></tr>
|
|
</table>
|
|
</center>
|
|
<hr>
|
|
|
|
|
|
<center>
|
|
<h1>H5R: Reference Interface</h1>
|
|
</center>
|
|
|
|
<h2>Reference API Functions</h2>
|
|
|
|
The Reference interface allows the user to create references
|
|
to specific objects and data regions in an HDF5 file.
|
|
<p>
|
|
|
|
<table border=0>
|
|
<tr><td valign=top>
|
|
<ul>
|
|
<li><a href="#Reference-Create">H5Rcreate</a>
|
|
</ul>
|
|
</td><td> </td><td valign=top>
|
|
<ul>
|
|
<li><a href="#Reference-Dereference">H5Rdereference</a>
|
|
</ul>
|
|
</td><td> </td><td valign=top>
|
|
<ul>
|
|
<li><a href="#Reference-GetRegion">H5Rget_region</a> (NYI)
|
|
</ul>
|
|
</td></tr>
|
|
<tr><td colspan=5 align=right><font size=-1>
|
|
NYI = Not yet implemented.</font>
|
|
</td></tr>
|
|
</table>
|
|
|
|
<p>
|
|
<i>Note: The only type of reference implemented in this release
|
|
is an object reference pointing to a dataset.</i>
|
|
<p>
|
|
|
|
<hr>
|
|
<dl>
|
|
<dt><strong>Name:</strong> <a name="Reference-Create">H5Rcreate</a>
|
|
<dt><strong>Signature:</strong>
|
|
<dd><em>herr_t</em> <code>H5Rcreate</code>(<em>href_t *</em><code>ref</code>,
|
|
<em>hid_t</em> <code>loc_id</code>,
|
|
<em>const char *</em><code>name</code>,
|
|
<em>H5R_type_t</em> <code>ref_type</code>,
|
|
<em>hid_t</em> <code>space_id</code>
|
|
)
|
|
<dt><strong>Purpose:</strong>
|
|
<dd>Creates a reference.
|
|
<dt><strong>Description:</strong>
|
|
<dd><code>H5Rcreate</code> creates the reference, <code>ref</code>,
|
|
of the type specified in <code>ref_type</code>, pointing to
|
|
the object <code>name</code> located at <code>loc_id</code>.
|
|
<p>
|
|
The parameters <code>loc_id</code> and <code>name</code> are
|
|
used to locate the object.
|
|
<p>
|
|
The parameter <code>space_id</code> identifies the region
|
|
to be pointed to (for dataset region references).
|
|
<p>
|
|
<i>Note: Only object references of type <code>H5T_STD_REF_OBJ</code>
|
|
pointing to entire datasets are implemented at this time.</i>
|
|
<dt><strong>Parameters:</strong>
|
|
<dl>
|
|
<dt><em>href_t *</em><code>ref</code>
|
|
<dd>OUT: Reference created by the function call.
|
|
<dt><em>hid_t</em> <code>loc_id</code>
|
|
<dd>IN: Location identifier used to locate the object being
|
|
pointed to.
|
|
<dt><em>const char *</em><code>name</code>
|
|
<dd>IN: Name of object at location <code>loc_id</code>.
|
|
<dt><em>H5R_type_t</em> <code>ref_type</code>
|
|
<dd>IN: Type of reference.
|
|
<dt><em>hid_t</em> <code>space_id</code>
|
|
<dd>IN: Dataspace identifier with selection.
|
|
Used for dataset region references.
|
|
</dl>
|
|
<dt><strong>Returns:</strong>
|
|
<dd>Returns a non-negative value if successful;
|
|
otherwise returns a negative value.
|
|
</dl>
|
|
|
|
|
|
<hr>
|
|
<dl>
|
|
<dt><strong>Name:</strong> <a name="Reference-Dereference">H5Rdereference</a>
|
|
<dt><strong>Signature:</strong>
|
|
<dd><em>hid_t</em> <code>H5Rdereference</code>(<em>hid_t</em> <code>dataset</code>,
|
|
<em>H5R_type_t</em> <code>ref_type</code>,
|
|
<em>href_t *</em><code>ref</code>
|
|
)
|
|
<dt><strong>Purpose:</strong>
|
|
<dd>Opens the HDF5 object referenced.
|
|
<dt><strong>Description:</strong>
|
|
<dd>Given a reference to some object, <code>H5Rdereference</code>
|
|
opens that object and returns an identifier.
|
|
<p>
|
|
The parameter <code>ref_type</code> specifies the reference type
|
|
of <code>ref</code>. See
|
|
<a href="References.html#Reference-RefTypes">Reference Types</a> in
|
|
<a href="References.html"><i>References (H5R)</i></a>
|
|
for a list of valid reference types.
|
|
<dt><strong>Parameters:</strong>
|
|
<dl>
|
|
<dt><em>hid_t</em> <code>dataset</code>
|
|
<dd>IN: Dataset containing reference object.
|
|
<dt><em>H5R_type_t</em> <code>ref_type</code>
|
|
<dd>IN: The reference type of <code>ref</code>.
|
|
<dt><em>void *</em><code>ref</code>
|
|
<dd>IN: Reference to open.
|
|
</dl>
|
|
<dt><strong>Returns:</strong>
|
|
<dd>Returns valid identifier if successful;
|
|
otherwise returns a negative value.
|
|
</dl>
|
|
|
|
|
|
<hr>
|
|
<dl>
|
|
<dt><strong>Name:</strong> <a name="Reference-GetRegion">H5Rget_region</a>
|
|
<i>(Not yet implemented.)</i>
|
|
<dt><strong>Signature:</strong>
|
|
<dd><em>hid_t</em> <code>H5Rget_region</code>(<em>hid_t</em> <code>dataset</code>,
|
|
<em>H5R_type_t</em> <code>ref_type</code>,
|
|
<em>href_t *</em><code>ref</code>
|
|
)
|
|
<dt><strong>Purpose:</strong>
|
|
<dd>Retrieves a dataspace with the specified region selected.
|
|
<dt><strong>Description:</strong>
|
|
<dd>Given a reference to an object <code>ref</code>,
|
|
<code>H5Rget_region</code> creates a copy of the dataspace
|
|
of the dataset pointed to and defines a selection in the copy
|
|
which is the region pointed to.
|
|
<p>
|
|
The parameter <code>ref_type</code> specifies the reference type
|
|
of <code>ref</code>. See
|
|
<a href="References.html#Reference-RefTypes">Reference Types</a> in
|
|
<a href="References.html"><i>References (H5R)</i></a>
|
|
for a list of valid reference types.
|
|
<dt><strong>Parameters:</strong>
|
|
<dl>
|
|
<dt><em>hid_t</em> <code>dataset</code>,
|
|
<dd>IN: Dataset containing reference object.
|
|
<dt><em>H5R_type_t</em> <code>ref_type</code>,
|
|
<dd>IN: The reference type of <code>ref</code>.
|
|
<dt><em>href_t *</em><code>ref</code>
|
|
<dd>IN: Reference to open.
|
|
</dl>
|
|
<dt><strong>Returns:</strong>
|
|
<dd>Returns a valid identifier if successful;
|
|
otherwise returns a negative value.
|
|
</dl>
|
|
|
|
|
|
<hr>
|
|
<center>
|
|
<table border=0 width=98%>
|
|
<tr><td valign=top align=left>
|
|
<a href="H5.intro.html">Introduction to HDF5</a> <br>
|
|
<a href="H5.user.html">HDF5 User Guide</a> <br>
|
|
<a href="index.html">Other HDF5 documents and links</a> <br>
|
|
<!--
|
|
<a href="Glossary.html">Glossary</a><br>
|
|
-->
|
|
</td>
|
|
<td valign=top align=right>
|
|
And in this document, the
|
|
<a href="RM_H5Front.html">HDF5 Reference Manual</a>
|
|
<br>
|
|
<a href="RM_H5.html">H5</a>
|
|
<a href="RM_H5A.html">H5A</a>
|
|
<a href="RM_H5D.html">H5D</a>
|
|
<a href="RM_H5E.html">H5E</a>
|
|
<a href="RM_H5F.html">H5F</a>
|
|
<a href="RM_H5G.html">H5G</a>
|
|
<a href="RM_H5I.html">H5I</a>
|
|
<br>
|
|
<a href="RM_H5P.html">H5P</a>
|
|
H5R
|
|
<a href="RM_H5RA.html">H5RA</a>
|
|
<a href="RM_H5S.html">H5S</a>
|
|
<a href="RM_H5T.html">H5T</a>
|
|
<a href="RM_H5Z.html">H5Z</a>
|
|
<a href="Tools.html">Tools</a>
|
|
</td></tr>
|
|
</table>
|
|
</center>
|
|
<hr>
|
|
|
|
|
|
<address>
|
|
<a href="mailto:hdfhelp@ncsa.uiuc.edu">HDF Help Desk</a>
|
|
|
|
<br>
|
|
Last modified: 30 October 1998
|
|
|
|
</body>
|
|
</html>
|