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authorFrank Baker <fbaker@hdfgroup.org>2003-10-07 19:50:38 (GMT)
committerFrank Baker <fbaker@hdfgroup.org>2003-10-07 19:50:38 (GMT)
commit038c920c9f767d9be17cc6df0eb53a70bc71c557 (patch)
treede13d52ee025e2a0971ae4ad2e8e5f2abd6c8990 /doc/html/RM_H5A.html
parent5956fb63812e9156af8549f31fef9e3e6a93c5bd (diff)
downloadhdf5-038c920c9f767d9be17cc6df0eb53a70bc71c557.zip
hdf5-038c920c9f767d9be17cc6df0eb53a70bc71c557.tar.gz
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[svn-r7566]
Purpose: Aphabetic sort of RM function entries Integrated Fortran90 APIs -- h5acreate_f and h5aclose_f Platforms tested: IE 5, Safari
Diffstat (limited to 'doc/html/RM_H5A.html')
-rw-r--r--doc/html/RM_H5A.html520
1 files changed, 284 insertions, 236 deletions
diff --git a/doc/html/RM_H5A.html b/doc/html/RM_H5A.html
index 5422661..11b8cc6 100644
--- a/doc/html/RM_H5A.html
+++ b/doc/html/RM_H5A.html
@@ -25,6 +25,7 @@ HDF5/H5A API Specification
<!-- #EndLibraryItem --></head>
<body bgcolor="#FFFFFF">
+<!-- HEADER RIGHT " " -->
<!-- #BeginLibraryItem "/ed_libs/NavBar_RM.lbi" --><hr>
@@ -60,8 +61,7 @@ And in this document, the
</td></tr>
</table>
</center>
-<hr>
-<!-- #EndLibraryItem --><center>
+<hr><!-- #EndLibraryItem --><center>
<h1>H5A: Attribute Interface</h1>
</center>
@@ -104,39 +104,45 @@ and information about attributes.
<table border="0">
<tr>
<td valign="top">
+ <ul>
<li><a href="#Annot-Close">H5Aclose</a>
<li><a href="#Annot-Create">H5Acreate</a>
<li><a href="#Annot-Delete">H5Adelete</a>
- <li><a href="#Annot-GetName">H5Aget_name</a>
+ <li><a href="#Annot-GetName">H5Aget_name</a>
+ </ul>
</td>
<td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td>
<td valign="top">
+ <ul>
<li><a href="#Annot-NumAttrs">H5Aget_num_attrs</a>
<li><a href="#Annot-GetSpace">H5Aget_space</a>
<li><a href="#Annot-GetType">H5Aget_type</a>
<li><a href="#Annot-Iterate">H5Aiterate</a>
- </td>
+ </ul>
+ </td>
<td>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</td>
<td valign="top">
+ <ul>
<li><a href="#Annot-OpenIdx">H5Aopen_idx</a>
<li><a href="#Annot-OpenName">H5Aopen_name</a>
<li><a href="#Annot-Read">H5Aread</a>
<li><a href="#Annot-Write">H5Awrite</a>
+ </ul>
</td>
</tr>
</table>
-<p>
+<br>
<strong>The FORTRAN90 Interfaces:</strong>
<br>
<font size=-1>
<i>In general, each FORTRAN90 subroutine performs exactly the same task
-as the corresponding C function. The links below go to the C function
+as the corresponding C function. The links below (electronic versions only) go to the C function
descriptions, which serve as general descriptions for both. A button,
under <strong>Non-C API(s)</strong> at the end of the C function description,
opens an external browser window displaying the FORTRAN90-specific
@@ -144,6 +150,7 @@ information. You will probably want to adjust the size and location of
this external window so that both browser windows are visible and to
facilitate moving easily between them.</i>
</font>
+<br>
<table border=0>
<tr><td valign=top>
@@ -189,15 +196,61 @@ library and is up to the user's interpretation.
See <a href="Attributes.html"><cite>Attributes</cite></a> in the
<a href="H5.user.html"><cite>HDF5 User's Guide</cite></a> for further information.
+<!-- NEW PAGE -->
+<!-- NEW PAGE -->
+<!-- HEADER RIGHT "H5Aclose" -->
+<hr>
+<dl>
+<dt><strong>Name:</strong> <a name="Annot-Close">H5Aclose</a>
+<dt><strong>Signature:</strong>
+ <dd><em>herr_t</em> <code>H5Aclose</code>(<em>hid_t</em> <code>attr_id</code>)
+<dt><strong>Purpose:</strong>
+ <dd>Closes the specified attribute.
+<dt><strong>Description:</strong>
+ <dd><code>H5Aclose</code> terminates access to the attribute
+ specified by <code>attr_id</code> by releasing the identifier.
+ <p>
+ Further use of a released attribute identifier is illegal;
+ a function using such an identifier will fail.
+<dt><strong>Parameters:</strong>
+ <dl>
+ <dt><em>hid_t</em> <code>attr_id</code>
+ <dd>IN: Attribute to release access to.
+ </dl>
+<dt><strong>Returns:</strong>
+ <dd>Returns a non-negative value if successful;
+ otherwise returns a negative value.
+<dt><strong>Fortran90 Interface:</strong> h5aclose_f
+ <dd>
+ <pre>
+SUBROUTINE h5aclose_f(attr_id, hdferr)
+ IMPLICIT NONE
+ INTEGER(HID_T), INTENT(OUT) :: attr_id ! Attribute identifier
+ INTEGER, INTENT(OUT) :: hdferr ! Error code
+ ! 0 on success and -1 on failure
+END SUBROUTINE h5aclose_f
+ </pre>
+
+
+ <!--<dt><strong>Non-C API(s):</strong>
+ <dd>
+
+ <img src="Graphics/Java.gif">
+ <img src="Graphics/C++.gif">
+ -->
+</dl>
+
+<!-- NEW PAGE -->
+<!-- HEADER RIGHT "H5Acreate" -->
<hr>
<dl>
<dt><strong>Name:</strong> <a name="Annot-Create">H5Acreate</a>
<dt><strong>Signature:</strong>
- <dd><em>hid_t</em> <code>H5Acreate</code>(<em>hid_t</em> <code>loc_id</code>,
+ <dd><font size="-1"><em>hid_t</em> <code>H5Acreate</code>(<em>hid_t</em> <code>loc_id</code>,
<em>const char *</em><code>name</code>,
<em>hid_t</em> <code>type_id</code>,
<em>hid_t</em> <code>space_id</code>,
- <em>hid_t</em> <code>create_plist</code>
+ <em>hid_t</em> <code>create_plist</code></font>
)
<dt><strong>Purpose:</strong>
<dd>Creates a dataset as an attribute of another group, dataset,
@@ -224,107 +277,82 @@ See <a href="Attributes.html"><cite>Attributes</cite></a> in the
is currently unused;
it may be used in the future for optional attribute properties.
At this time, <code>H5P_DEFAULT</code> is the only accepted value.
- <p>
+ </p>
The attribute identifier returned from this function must be released
with <code>H5Aclose</code> or resource leaks will develop.
<dt><strong>Parameters:</strong>
<dl>
- <dt><em>hid_t</em> <code>loc_id</code>
- <dd>IN: Object (dataset, group, or named datatype) to be attached to.
- <dt><em>const char *</em><code>name</code>
- <dd>IN: Name of attribute to create.
- <dt><em>hid_t</em> <code>type_id</code>
- <dd>IN: Identifier of datatype for attribute.
- <dt><em>hid_t</em> <code>space_id</code>
- <dd>IN: Identifier of dataspace for attribute.
- <dt><em>hid_t</em> <code>create_plist</code>
+ <dt><em>hid_t</em> <code>loc_id</code></dt>
+ <dd>IN: Object (dataset, group, or named datatype) to be attached to.</dd>
+ <dt><em>const char *</em><code>name</code></dt>
+ <dd>IN: Name of attribute to create.</dd>
+ <dt><em>hid_t</em> <code>type_id</code></dt>
+ <dd>IN: Identifier of datatype for attribute.</dd>
+ <dt><em>hid_t</em> <code>space_id</code></dt>
+ <dd>IN: Identifier of dataspace for attribute.</dd>
+ <dt><em>hid_t</em> <code>create_plist</code></dt>
<dd>IN: Identifier of creation property list. (Currently unused;
- the only accepted value is <code>H5P_DEFAULT</code>.)
+ the only accepted value is <code>H5P_DEFAULT</code>.)</dd>
</dl>
<dt><strong>Returns:</strong>
<dd>Returns an attribute identifier if successful;
otherwise returns a negative value.
-<dt><strong>Non-C API(s):</strong>
- <dd><a href="fortran/h5a_FORTRAN.html#h5acreate_f"
- target="FortranWin"><img src="Graphics/FORTRAN.gif" border=0></a>
- <!--
+
+ <!--<dt><strong>Non-C API(s):</strong>
<img src="Graphics/Java.gif">
<img src="Graphics/C++.gif">
-->
+
+<dt><strong>Fortran90 Interface:</strong> h5acreate_f
+ <dd>
+ <pre>
+SUBROUTINE h5acreate_f(obj_id, name, type_id, space_id, attr_id, &amp; hdferr, creation_prp)
+ IMPLICIT NONE
+ INTEGER(HID_T), INTENT(IN) :: obj_id ! Object identifier
+ CHARACTER(LEN=*), INTENT(IN) :: name ! Attribute name
+ INTEGER(HID_T), INTENT(IN) :: type_id ! Attribute datatype identifier
+ INTEGER(HID_T), INTENT(IN) :: space_id ! Attribute dataspace identifier
+ INTEGER(HID_T), INTENT(OUT) :: attr_id ! Attribute identifier
+ INTEGER, INTENT(OUT) :: hdferr ! Error code:
+ ! 0 on success and -1 on failure
+ INTEGER(HID_T), OPTIONAL, INTENT(IN) :: creation_prp
+ ! Attribute creation property
+ ! list identifier
+END SUBROUTINE h5acreate_f
+ </pre>
</dl>
-
+<!-- NEW PAGE -->
+<!-- HEADER RIGHT "H5Adelete" -->
<hr>
<dl>
-<dt><strong>Name:</strong> <a name="Annot-OpenName">H5Aopen_name</a>
+<dt><strong>Name:</strong> <a name="Annot-Delete">H5Adelete</a>
<dt><strong>Signature:</strong>
- <dd><em>hid_t</em> <code>H5Aopen_name</code>(<em>hid_t</em> <code>loc_id</code>,
+ <dd><em>herr_t</em> <code>H5Adelete</code>(<em>hid_t</em> <code>loc_id</code>,
<em>const char *</em><code>name</code>
)
<dt><strong>Purpose:</strong>
- <dd> Opens an attribute specified by name.
+ <dd>Deletes an attribute from a location.
<dt><strong>Description:</strong>
- <dd><code>H5Aopen_name</code> opens an attribute specified by
- its name, <code>name</code>, which is attached to the
- object specified with <code>loc_id</code>.
- The location object may be either a group, dataset, or
- named datatype, which may have any sort of attribute.
- The attribute identifier returned from this function must
- be released with <code>H5Aclose</code> or resource leaks
- will develop.
+ <dd><code>H5Adelete</code> removes the attribute specified by its
+ name, <code>name</code>, from a dataset, group, or named datatype.
+ This function should not be used when attribute identifiers are
+ open on <code>loc_id</code> as it may cause the internal indexes
+ of the attributes to change and future writes to the open
+ attributes to produce incorrect results.
<dt><strong>Parameters:</strong>
<dl>
<dt><em>hid_t</em> <code>loc_id</code>
- <dd>IN: Identifier of a group, dataset, or named datatype
- atttribute to be attached to.
+ <dd>IN: Identifier of the dataset, group, or named datatype
+ to have the attribute deleted from.
<dt><em>const char *</em><code>name</code>
- <dd>IN: Attribute name.
- </dl>
-<dt><strong>Returns:</strong>
- <dd>Returns attribute identifier if successful;
- otherwise returns a negative value.
-<dt><strong>Non-C API(s):</strong>
- <dd><a href="fortran/h5a_FORTRAN.html#h5aopen_name_f"
- target="FortranWin"><img src="Graphics/FORTRAN.gif" border=0></a>
- <!--
- <img src="Graphics/Java.gif">
- <img src="Graphics/C++.gif">
- -->
-</dl>
-
-
-<hr>
-<dl>
-<dt><strong>Name:</strong> <a name="Annot-OpenIdx">H5Aopen_idx</a>
-<dt><strong>Signature:</strong>
- <dd><em>hid_t</em> <code>H5Aopen_idx</code>(<em>hid_t</em> <code>loc_id</code>,
- <em>unsigned int</em> <code>idx</code>
- )
-<dt><strong>Purpose:</strong>
- <dd>Opens the attribute specified by its index.
-<dt><strong>Description:</strong>
- <dd><code>H5Aopen_idx</code> opens an attribute which is attached
- to the object specified with <code>loc_id</code>.
- The location object may be either a group, dataset, or
- named datatype, all of which may have any sort of attribute.
- The attribute specified by the index, <code>idx</code>,
- indicates the attribute to access.
- The value of <code>idx</code> is a 0-based, non-negative integer.
- The attribute identifier returned from this function must be
- released with <code>H5Aclose</code> or resource leaks will develop.
-<dt><strong>Parameters:</strong>
- <dl>
- <dt><em>hid_t</em> <code>loc_id</code>
- <dd>IN: Identifier of the group, dataset, or named datatype
- attribute to be attached to.
- <dt><em>unsigned int</em> <code>idx</code>
- <dd>IN: Index of the attribute to open.
+ <dd>IN: Name of the attribute to delete.
</dl>
<dt><strong>Returns:</strong>
- <dd>Returns attribute identifier if successful;
+ <dd>Returns a non-negative value if successful;
otherwise returns a negative value.
<dt><strong>Non-C API(s):</strong>
- <dd><a href="fortran/h5a_FORTRAN.html#h5aopen_idx_f"
+ <dd><a href="fortran/h5a_FORTRAN.html#h5adelete_f"
target="FortranWin"><img src="Graphics/FORTRAN.gif" border=0></a>
<!--
<img src="Graphics/Java.gif">
@@ -332,44 +360,41 @@ See <a href="Attributes.html"><cite>Attributes</cite></a> in the
-->
</dl>
-
+<!-- NEW PAGE -->
+<!-- HEADER RIGHT "H5Aget_name" -->
<hr>
<dl>
-<dt><strong>Name:</strong> <a name="Annot-Write">H5Awrite</a>
+<dt><strong>Name:</strong> <a name="Annot-GetName">H5Aget_name</a>
<dt><strong>Signature:</strong>
- <dd><em>herr_t</em> <code>H5Awrite</code>(<em>hid_t</em> <code>attr_id</code>,
- <em>hid_t</em> <code>mem_type_id</code>,
- <em>const void *</em><code>buf</code>
+ <dd><em>ssize_t</em> <code>H5Aget_name</code>(<em>hid_t</em> <code>attr_id</code>,
+ <em>size_t</em> <code>buf_size</code>,
+ <em>char *</em><code>buf</code>
)
<dt><strong>Purpose:</strong>
- <dd>Writes data to an attribute.
+ <dd>Gets an attribute name.
<dt><strong>Description:</strong>
- <dd><code>H5Awrite</code> writes an attribute, specified with
- <code>attr_id</code>. The attribute's memory datatype
- is specified with <code>mem_type_id</code>. The entire
- attribute is written from <code>buf</code> to the file.
- <p>
- Datatype conversion takes place at the time of a read or write
- and is automatic. See the
- <a href="Datatypes.html#Datatypes-DataConversion">Data Conversion</a>
- section of <cite>The Data Type Interface (H5T)</cite> in the
- <cite>HDF5 User's Guide</cite> for a discussion of
- data conversion, including the range of conversions currently
- supported by the HDF5 libraries.
+ <dd><code>H5Aget_name</code> retrieves the name of an attribute
+ specified by the identifier, <code>attr_id</code>.
+ Up to <code>buf_size</code> characters are stored in
+ <code>buf</code> followed by a <code>\0</code> string
+ terminator. If the name of the attribute is longer than
+ <code>(buf_size -1)</code>, the string terminator is stored in the
+ last position of the buffer to properly terminate the string.
<dt><strong>Parameters:</strong>
<dl>
<dt><em>hid_t</em> <code>attr_id</code>
- <dd>IN: Identifier of an attribute to write.
- <dt><em>hid_t</em> <code>mem_type_id</code>
- <dd>IN: Identifier of the attribute datatype (in memory).
- <dt><em>const void *</em><code>buf</code>
- <dd>IN: Data to be written.
+ <dd>IN: Identifier of the attribute.
+ <dt><em>size_t</em> <code>buf_size</code>
+ <dd>IN: The size of the buffer to store the name in.
+ <dt><em>char *</em><code>buf</code>
+ <dd>IN: Buffer to store name in.
</dl>
<dt><strong>Returns:</strong>
- <dd>Returns a non-negative value if successful;
- otherwise returns a negative value.
+ <dd>Returns the length of the attribute's name, which may be
+ longer than <code>buf_size</code>, if successful.
+ Otherwise returns a negative value.
<dt><strong>Non-C API(s):</strong>
- <dd><a href="fortran/h5a_FORTRAN.html#h5awrite_f"
+ <dd><a href="fortran/h5a_FORTRAN.html#h5aget_name_f"
target="FortranWin"><img src="Graphics/FORTRAN.gif" border=0></a>
<!--
<img src="Graphics/Java.gif">
@@ -377,44 +402,30 @@ See <a href="Attributes.html"><cite>Attributes</cite></a> in the
-->
</dl>
-
+<!-- NEW PAGE -->
+<!-- HEADER RIGHT "H5Aget_num_attrs" -->
<hr>
<dl>
-<dt><strong>Name:</strong> <a name="Annot-Read">H5Aread</a>
+<dt><strong>Name:</strong> <a name="Annot-NumAttrs">H5Aget_num_attrs</a>
<dt><strong>Signature:</strong>
- <dd><em>herr_t</em> <code>H5Aread</code>(<em>hid_t</em> <code>attr_id</code>,
- <em>hid_t</em> <code>mem_type_id</code>,
- <em>void *</em><code>buf</code>
- )
+ <dd><em>int</em> <code>H5Aget_num_attrs</code>(<em>hid_t</em> <code>loc_id</code>)
<dt><strong>Purpose:</strong>
- <dd>Reads an attribute.
+ <dd>Determines the number of attributes attached to an object.
<dt><strong>Description:</strong>
- <dd><code>H5Aread</code> reads an attribute, specified with
- <code>attr_id</code>. The attribute's memory datatype
- is specified with <code>mem_type_id</code>. The entire
- attribute is read into <code>buf</code> from the file.
- <p>
- Datatype conversion takes place at the time of a read or write
- and is automatic. See the
- <a href="Datatypes.html#Datatypes-DataConversion">Data Conversion</a>
- section of <cite>The Data Type Interface (H5T)</cite> in the
- <cite>HDF5 User's Guide</cite> for a discussion of
- data conversion, including the range of conversions currently
- supported by the HDF5 libraries.
+ <dd><code>H5Aget_num_attrs</code> returns the number of attributes
+ attached to the object specified by its identifier,
+ <code>loc_id</code>.
+ The object can be a group, dataset, or named datatype.
<dt><strong>Parameters:</strong>
<dl>
- <dt><em>hid_t</em> <code>attr_id</code>
- <dd>IN: Identifier of an attribute to read.
- <dt><em>hid_t</em> <code>mem_type_id</code>
- <dd>IN: Identifier of the attribute datatype (in memory).
- <dt><em>void *</em><code>buf</code>
- <dd>OUT: Buffer for data to be read.
+ <dt><em>hid_t</em> <code>loc_id</code>
+ <dd>IN: Identifier of a group, dataset, or named datatype.
</dl>
<dt><strong>Returns:</strong>
- <dd>Returns a non-negative value if successful;
+ <dd>Returns the number of attributes if successful;
otherwise returns a negative value.
<dt><strong>Non-C API(s):</strong>
- <dd><a href="fortran/h5a_FORTRAN.html#h5aread_f"
+ <dd><a href="fortran/h5a_FORTRAN.html#h5aget_num_attrs_f"
target="FortranWin"><img src="Graphics/FORTRAN.gif" border=0></a>
<!--
<img src="Graphics/Java.gif">
@@ -422,7 +433,8 @@ See <a href="Attributes.html"><cite>Attributes</cite></a> in the
-->
</dl>
-
+<!-- NEW PAGE -->
+<!-- HEADER RIGHT "H5Aget_space" -->
<hr>
<dl>
<dt><strong>Name:</strong> <a name="Annot-GetSpace">H5Aget_space</a>
@@ -452,7 +464,8 @@ See <a href="Attributes.html"><cite>Attributes</cite></a> in the
-->
</dl>
-
+<!-- NEW PAGE -->
+<!-- HEADER RIGHT "H5Aget_type" -->
<hr>
<dl>
<dt><strong>Name:</strong> <a name="Annot-GetType">H5Aget_type</a>
@@ -488,78 +501,8 @@ See <a href="Attributes.html"><cite>Attributes</cite></a> in the
-->
</dl>
-
-<hr>
-<dl>
-<dt><strong>Name:</strong> <a name="Annot-GetName">H5Aget_name</a>
-<dt><strong>Signature:</strong>
- <dd><em>ssize_t</em> <code>H5Aget_name</code>(<em>hid_t</em> <code>attr_id</code>,
- <em>size_t</em> <code>buf_size</code>,
- <em>char *</em><code>buf</code>
- )
-<dt><strong>Purpose:</strong>
- <dd>Gets an attribute name.
-<dt><strong>Description:</strong>
- <dd><code>H5Aget_name</code> retrieves the name of an attribute
- specified by the identifier, <code>attr_id</code>.
- Up to <code>buf_size</code> characters are stored in
- <code>buf</code> followed by a <code>\0</code> string
- terminator. If the name of the attribute is longer than
- <code>(buf_size -1)</code>, the string terminator is stored in the
- last position of the buffer to properly terminate the string.
-<dt><strong>Parameters:</strong>
- <dl>
- <dt><em>hid_t</em> <code>attr_id</code>
- <dd>IN: Identifier of the attribute.
- <dt><em>size_t</em> <code>buf_size</code>
- <dd>IN: The size of the buffer to store the name in.
- <dt><em>char *</em><code>buf</code>
- <dd>IN: Buffer to store name in.
- </dl>
-<dt><strong>Returns:</strong>
- <dd>Returns the length of the attribute's name, which may be
- longer than <code>buf_size</code>, if successful.
- Otherwise returns a negative value.
-<dt><strong>Non-C API(s):</strong>
- <dd><a href="fortran/h5a_FORTRAN.html#h5aget_name_f"
- target="FortranWin"><img src="Graphics/FORTRAN.gif" border=0></a>
- <!--
- <img src="Graphics/Java.gif">
- <img src="Graphics/C++.gif">
- -->
-</dl>
-
-
-<hr>
-<dl>
-<dt><strong>Name:</strong> <a name="Annot-NumAttrs">H5Aget_num_attrs</a>
-<dt><strong>Signature:</strong>
- <dd><em>int</em> <code>H5Aget_num_attrs</code>(<em>hid_t</em> <code>loc_id</code>)
-<dt><strong>Purpose:</strong>
- <dd>Determines the number of attributes attached to an object.
-<dt><strong>Description:</strong>
- <dd><code>H5Aget_num_attrs</code> returns the number of attributes
- attached to the object specified by its identifier,
- <code>loc_id</code>.
- The object can be a group, dataset, or named datatype.
-<dt><strong>Parameters:</strong>
- <dl>
- <dt><em>hid_t</em> <code>loc_id</code>
- <dd>IN: Identifier of a group, dataset, or named datatype.
- </dl>
-<dt><strong>Returns:</strong>
- <dd>Returns the number of attributes if successful;
- otherwise returns a negative value.
-<dt><strong>Non-C API(s):</strong>
- <dd><a href="fortran/h5a_FORTRAN.html#h5aget_num_attrs_f"
- target="FortranWin"><img src="Graphics/FORTRAN.gif" border=0></a>
- <!--
- <img src="Graphics/Java.gif">
- <img src="Graphics/C++.gif">
- -->
-</dl>
-
-
+<!-- NEW PAGE -->
+<!-- HEADER RIGHT "H5Aiterate" -->
<hr>
<dl>
<dt><strong>Name:</strong> <a name="Annot-Iterate">H5Aiterate</a>
@@ -631,36 +574,80 @@ See <a href="Attributes.html"><cite>Attributes</cite></a> in the
-->
</dl>
+<!-- NEW PAGE -->
+<!-- HEADER RIGHT "H5Aopen_idx" -->
+<hr>
+<dl>
+<dt><strong>Name:</strong> <a name="Annot-OpenIdx">H5Aopen_idx</a>
+<dt><strong>Signature:</strong>
+ <dd><em>hid_t</em> <code>H5Aopen_idx</code>(<em>hid_t</em> <code>loc_id</code>,
+ <em>unsigned int</em> <code>idx</code>
+ )
+<dt><strong>Purpose:</strong>
+ <dd>Opens the attribute specified by its index.
+<dt><strong>Description:</strong>
+ <dd><code>H5Aopen_idx</code> opens an attribute which is attached
+ to the object specified with <code>loc_id</code>.
+ The location object may be either a group, dataset, or
+ named datatype, all of which may have any sort of attribute.
+ The attribute specified by the index, <code>idx</code>,
+ indicates the attribute to access.
+ The value of <code>idx</code> is a 0-based, non-negative integer.
+ The attribute identifier returned from this function must be
+ released with <code>H5Aclose</code> or resource leaks will develop.
+<dt><strong>Parameters:</strong>
+ <dl>
+ <dt><em>hid_t</em> <code>loc_id</code>
+ <dd>IN: Identifier of the group, dataset, or named datatype
+ attribute to be attached to.
+ <dt><em>unsigned int</em> <code>idx</code>
+ <dd>IN: Index of the attribute to open.
+ </dl>
+<dt><strong>Returns:</strong>
+ <dd>Returns attribute identifier if successful;
+ otherwise returns a negative value.
+<dt><strong>Non-C API(s):</strong>
+ <dd><a href="fortran/h5a_FORTRAN.html#h5aopen_idx_f"
+ target="FortranWin"><img src="Graphics/FORTRAN.gif" border=0></a>
+ <!--
+ <img src="Graphics/Java.gif">
+ <img src="Graphics/C++.gif">
+ -->
+</dl>
+<!-- NEW PAGE -->
+<!-- HEADER RIGHT "H5Aopen_name" -->
<hr>
<dl>
-<dt><strong>Name:</strong> <a name="Annot-Delete">H5Adelete</a>
+<dt><strong>Name:</strong> <a name="Annot-OpenName">H5Aopen_name</a>
<dt><strong>Signature:</strong>
- <dd><em>herr_t</em> <code>H5Adelete</code>(<em>hid_t</em> <code>loc_id</code>,
+ <dd><em>hid_t</em> <code>H5Aopen_name</code>(<em>hid_t</em> <code>loc_id</code>,
<em>const char *</em><code>name</code>
)
<dt><strong>Purpose:</strong>
- <dd>Deletes an attribute from a location.
+ <dd> Opens an attribute specified by name.
<dt><strong>Description:</strong>
- <dd><code>H5Adelete</code> removes the attribute specified by its
- name, <code>name</code>, from a dataset, group, or named datatype.
- This function should not be used when attribute identifiers are
- open on <code>loc_id</code> as it may cause the internal indexes
- of the attributes to change and future writes to the open
- attributes to produce incorrect results.
+ <dd><code>H5Aopen_name</code> opens an attribute specified by
+ its name, <code>name</code>, which is attached to the
+ object specified with <code>loc_id</code>.
+ The location object may be either a group, dataset, or
+ named datatype, which may have any sort of attribute.
+ The attribute identifier returned from this function must
+ be released with <code>H5Aclose</code> or resource leaks
+ will develop.
<dt><strong>Parameters:</strong>
<dl>
<dt><em>hid_t</em> <code>loc_id</code>
- <dd>IN: Identifier of the dataset, group, or named datatype
- to have the attribute deleted from.
+ <dd>IN: Identifier of a group, dataset, or named datatype
+ atttribute to be attached to.
<dt><em>const char *</em><code>name</code>
- <dd>IN: Name of the attribute to delete.
+ <dd>IN: Attribute name.
</dl>
<dt><strong>Returns:</strong>
- <dd>Returns a non-negative value if successful;
+ <dd>Returns attribute identifier if successful;
otherwise returns a negative value.
<dt><strong>Non-C API(s):</strong>
- <dd><a href="fortran/h5a_FORTRAN.html#h5adelete_f"
+ <dd><a href="fortran/h5a_FORTRAN.html#h5aopen_name_f"
target="FortranWin"><img src="Graphics/FORTRAN.gif" border=0></a>
<!--
<img src="Graphics/Java.gif">
@@ -668,30 +655,45 @@ See <a href="Attributes.html"><cite>Attributes</cite></a> in the
-->
</dl>
-
+<!-- NEW PAGE -->
+<!-- HEADER RIGHT "H5Aread" -->
<hr>
<dl>
-<dt><strong>Name:</strong> <a name="Annot-Close">H5Aclose</a>
+<dt><strong>Name:</strong> <a name="Annot-Read">H5Aread</a>
<dt><strong>Signature:</strong>
- <dd><em>herr_t</em> <code>H5Aclose</code>(<em>hid_t</em> <code>attr_id</code>)
+ <dd><em>herr_t</em> <code>H5Aread</code>(<em>hid_t</em> <code>attr_id</code>,
+ <em>hid_t</em> <code>mem_type_id</code>,
+ <em>void *</em><code>buf</code>
+ )
<dt><strong>Purpose:</strong>
- <dd>Closes the specified attribute.
+ <dd>Reads an attribute.
<dt><strong>Description:</strong>
- <dd><code>H5Aclose</code> terminates access to the attribute
- specified by <code>attr_id</code> by releasing the identifier.
+ <dd><code>H5Aread</code> reads an attribute, specified with
+ <code>attr_id</code>. The attribute's memory datatype
+ is specified with <code>mem_type_id</code>. The entire
+ attribute is read into <code>buf</code> from the file.
<p>
- Further use of a released attribute identifier is illegal;
- a function using such an identifier will fail.
+ Datatype conversion takes place at the time of a read or write
+ and is automatic. See the
+ <a href="Datatypes.html#Datatypes-DataConversion">Data Conversion</a>
+ section of <cite>The Data Type Interface (H5T)</cite> in the
+ <cite>HDF5 User's Guide</cite> for a discussion of
+ data conversion, including the range of conversions currently
+ supported by the HDF5 libraries.
<dt><strong>Parameters:</strong>
<dl>
<dt><em>hid_t</em> <code>attr_id</code>
- <dd>IN: Attribute to release access to.
+ <dd>IN: Identifier of an attribute to read.
+ <dt><em>hid_t</em> <code>mem_type_id</code>
+ <dd>IN: Identifier of the attribute datatype (in memory).
+ <dt><em>void *</em><code>buf</code>
+ <dd>OUT: Buffer for data to be read.
</dl>
<dt><strong>Returns:</strong>
<dd>Returns a non-negative value if successful;
otherwise returns a negative value.
<dt><strong>Non-C API(s):</strong>
- <dd><a href="fortran/h5a_FORTRAN.html#h5aclose_f"
+ <dd><a href="fortran/h5a_FORTRAN.html#h5aread_f"
target="FortranWin"><img src="Graphics/FORTRAN.gif" border=0></a>
<!--
<img src="Graphics/Java.gif">
@@ -699,6 +701,51 @@ See <a href="Attributes.html"><cite>Attributes</cite></a> in the
-->
</dl>
+<!-- NEW PAGE -->
+<!-- HEADER RIGHT "H5Awrite" -->
+<hr>
+<dl>
+<dt><strong>Name:</strong> <a name="Annot-Write">H5Awrite</a>
+<dt><strong>Signature:</strong>
+ <dd><em>herr_t</em> <code>H5Awrite</code>(<em>hid_t</em> <code>attr_id</code>,
+ <em>hid_t</em> <code>mem_type_id</code>,
+ <em>const void *</em><code>buf</code>
+ )
+<dt><strong>Purpose:</strong>
+ <dd>Writes data to an attribute.
+<dt><strong>Description:</strong>
+ <dd><code>H5Awrite</code> writes an attribute, specified with
+ <code>attr_id</code>. The attribute's memory datatype
+ is specified with <code>mem_type_id</code>. The entire
+ attribute is written from <code>buf</code> to the file.
+ <p>
+ Datatype conversion takes place at the time of a read or write
+ and is automatic. See the
+ <a href="Datatypes.html#Datatypes-DataConversion">Data Conversion</a>
+ section of <cite>The Data Type Interface (H5T)</cite> in the
+ <cite>HDF5 User's Guide</cite> for a discussion of
+ data conversion, including the range of conversions currently
+ supported by the HDF5 libraries.
+<dt><strong>Parameters:</strong>
+ <dl>
+ <dt><em>hid_t</em> <code>attr_id</code>
+ <dd>IN: Identifier of an attribute to write.
+ <dt><em>hid_t</em> <code>mem_type_id</code>
+ <dd>IN: Identifier of the attribute datatype (in memory).
+ <dt><em>const void *</em><code>buf</code>
+ <dd>IN: Data to be written.
+ </dl>
+<dt><strong>Returns:</strong>
+ <dd>Returns a non-negative value if successful;
+ otherwise returns a negative value.
+<dt><strong>Non-C API(s):</strong>
+ <dd><a href="fortran/h5a_FORTRAN.html#h5awrite_f"
+ target="FortranWin"><img src="Graphics/FORTRAN.gif" border=0></a>
+ <!--
+ <img src="Graphics/Java.gif">
+ <img src="Graphics/C++.gif">
+ -->
+</dl>
<!-- #BeginLibraryItem "/ed_libs/NavBar_RM.lbi" --><hr>
<center>
@@ -733,14 +780,15 @@ And in this document, the
</td></tr>
</table>
</center>
-<hr>
-<!-- #EndLibraryItem --><!-- #BeginLibraryItem "/ed_libs/Footer.lbi" --><address>
+<hr><!-- #EndLibraryItem --><!-- #BeginLibraryItem "/ed_libs/Footer.lbi" --><address>
<a href="mailto:hdfhelp@ncsa.uiuc.edu">HDF Help Desk</a>
<br>
Describes HDF5 Release 1.6.0, July 2003
-</address><!-- #EndLibraryItem -->
-
-Last modified: 6 June 2001
+</address><!-- #EndLibraryItem --><SCRIPT LANGUAGE="JAVASCRIPT">
+<!--
+document.writeln("Last modified: 3 October 2003");
+-->
+</SCRIPT>
</body>
</html>