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<div id="org-div-home-and-up">
<a accesskey="h" href=""> UP </a>
|
<a accesskey="H" href="index.html"> HOME </a>
</div><div id="content">
<h1 class="title">TREXIO source code documentation</h1>
<hr />
<ul class="org-ul">
<li><a href="./templator_front.html">Front end API</a></li>
<li><a href="./templator_hdf5.html">HDF5 back end</a></li>
<li><a href="./templator_text.html">TEXT back end</a></li>
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<hr />
<p>
The ultimate goal of the TREXIO library is to provide a high-performance
implementation of basic I/O functionality for users within and beyond
the TREX-CoE.
</p>
<p>
The source code of the library is available at
<a href="https://github.com/trex-coe/trexio">https://github.com/trex-coe/trexio</a>
and bug reports should be submitted at
<a href="https://github.com/trex-coe/trexio/issues">https://github.com/trex-coe/trexio/issues</a>.
</p>
<hr />
<p>
<img src="https://trex-coe.eu/sites/default/files/inline-images/euflag.jpg" alt="euflag.jpg" /> <a href="https://trex-coe.eu">TREX: Targeting Real Chemical Accuracy at the Exascale</a> project has received funding from the European Union’s Horizon 2020 - Research and Innovation program - under grant agreement no. 952165. The content of this document does not represent the opinion of the European Union, and the European Union is not responsible for any use that might be made of such content.
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<p class="author">Author: TREX-CoE</p>
<p class="date">Created: 2021-04-12 Mon 12:32</p>
<p class="validation"><a href="http://validator.w3.org/check?uri=referer">Validate</a></p>
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<h1 class="title">TREXIO source code documentation</h1>
<hr />
<ul class="org-ul">
<li><a href="./templator_front.html">Front end API</a></li>
<li><a href="./templator_hdf5.html">HDF5 back end</a></li>
<li><a href="./templator_text.html">TEXT back end</a></li>
</ul>
<hr />
<p>
The ultimate goal of the TREXIO library is to provide a high-performance
implementation of basic I/O functionality for users within and beyond
the TREX-CoE.
</p>
<p>
The source code of the library is available at
<a href="https://github.com/trex-coe/trexio">https://github.com/trex-coe/trexio</a>
and bug reports should be submitted at
<a href="https://github.com/trex-coe/trexio/issues">https://github.com/trex-coe/trexio/issues</a>.
</p>
<hr />
<p>
<img src="https://trex-coe.eu/sites/default/files/inline-images/euflag.jpg" alt="euflag.jpg" /> <a href="https://trex-coe.eu">TREX: Targeting Real Chemical Accuracy at the Exascale</a> project has received funding from the European Union’s Horizon 2020 - Research and Innovation program - under grant agreement no. 952165. The content of this document does not represent the opinion of the European Union, and the European Union is not responsible for any use that might be made of such content.
</p>
</div>
<div id="postamble" class="status">
<p class="author">Author: TREX-CoE</p>
<p class="date">Created: 2021-04-12 Mon 12:32</p>
<p class="validation"><a href="http://validator.w3.org/check?uri=referer">Validate</a></p>
</div>
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<h1 class="title">HDF5 back end</h1>
<div id="table-of-contents">
<h2>Table of Contents</h2>
<div id="text-table-of-contents">
<ul>
<li><a href="#orgdba60cb">1. HDF5 back end</a>
<ul>
<li><a href="#org73945cd">1.1. Template for HDF5 definitions</a></li>
<li><a href="#orge10ebcf">1.2. Template for HDF5 structures</a></li>
<li><a href="#org9ff3f5e">1.3. Template for HDF5 init/deinit</a></li>
<li><a href="#org74ba7cb">1.4. Template for HDF5 has/read/write a number</a></li>
<li><a href="#org01b35d3">1.5. Template for HDF5 has/read/write a dataset</a></li>
</ul>
</li>
</ul>
</div>
</div>
<div id="outline-container-orgdba60cb" class="outline-2">
<h2 id="orgdba60cb"><span class="section-number-2">1</span> HDF5 back end</h2>
<div class="outline-text-2" id="text-1">
</div>
<div id="outline-container-org73945cd" class="outline-3">
<h3 id="org73945cd"><span class="section-number-3">1.1</span> Template for HDF5 definitions</h3>
<div class="outline-text-3" id="text-1-1">
<div class="org-src-container">
<pre class="src src-c"><span style="color: #483d8b;">#define</span> $GROUP$_GROUP_NAME <span style="color: #8b2252;">"$group$"</span>
<span style="color: #483d8b;">#define</span> $GROUP_NUM$_NAME <span style="color: #8b2252;">"$group_num$"</span>
<span style="color: #483d8b;">#define</span> $GROUP$_$GROUP_DSET$_NAME <span style="color: #8b2252;">"$group_dset$"</span>
</pre>
</div>
</div>
</div>
<div id="outline-container-orge10ebcf" class="outline-3">
<h3 id="orge10ebcf"><span class="section-number-3">1.2</span> Template for HDF5 structures</h3>
<div class="outline-text-3" id="text-1-2">
<div class="org-src-container">
<pre class="src src-c"><span style="color: #a020f0;">typedef</span> <span style="color: #a020f0;">struct</span> <span style="color: #228b22;">trexio_hdf5_s</span> {
<span style="color: #228b22;">trexio_t</span> <span style="color: #a0522d;">parent</span> ;
<span style="color: #228b22;">hid_t</span> <span style="color: #a0522d;">file_id</span>;
hid_t $group$_group;
<span style="color: #a020f0;">const</span> <span style="color: #228b22;">char</span>* <span style="color: #a0522d;">file_name</span>;
} <span style="color: #228b22;">trexio_hdf5_t</span>;
</pre>
</div>
</div>
</div>
<div id="outline-container-org9ff3f5e" class="outline-3">
<h3 id="org9ff3f5e"><span class="section-number-3">1.3</span> Template for HDF5 init/deinit</h3>
<div class="outline-text-3" id="text-1-3">
<div class="org-src-container">
<pre class="src src-c"><span style="color: #228b22;">trexio_exit_code</span>
<span style="color: #0000ff;">trexio_hdf5_init</span> (<span style="color: #228b22;">trexio_t</span>* <span style="color: #a020f0;">const</span> <span style="color: #a0522d;">file</span>)
{
<span style="color: #228b22;">trexio_hdf5_t</span>* <span style="color: #a020f0;">const</span> <span style="color: #a0522d;">f</span> = (<span style="color: #228b22;">trexio_hdf5_t</span>*) file;
/* <span style="color: #b22222;">If file doesn't exist, create it </span>*/
<span style="color: #228b22;">int</span> <span style="color: #a0522d;">f_exists</span> = 0;
<span style="color: #a020f0;">struct</span> <span style="color: #228b22;">stat</span> <span style="color: #a0522d;">st</span>;
<span style="color: #a020f0;">if</span> (stat(file-&gt;file_name, &amp;st) == 0) f_exists = 1;
<span style="color: #a020f0;">if</span> (f_exists == 1) {
<span style="color: #a020f0;">switch</span> (file-&gt;mode) {
<span style="color: #a020f0;">case</span> <span style="color: #8b2252;">'r'</span>:
// <span style="color: #b22222;">reading the existing file -&gt; open as RDONLY</span>
f-&gt;file_id = H5Fopen(file-&gt;file_name, H5F_ACC_RDONLY, H5P_DEFAULT);
<span style="color: #a020f0;">break</span>;
<span style="color: #a020f0;">case</span> <span style="color: #8b2252;">'a'</span>:
// <span style="color: #b22222;">appending the existing file -&gt; open as RDWR</span>
f-&gt;file_id = H5Fopen(file-&gt;file_name, H5F_ACC_RDWR, H5P_DEFAULT);
<span style="color: #a020f0;">break</span>;
<span style="color: #a020f0;">case</span> <span style="color: #8b2252;">'w'</span>:
// <span style="color: #b22222;">writing the existing file -&gt; overwrite it (_TRUNC) [_EXCL | H5F_ACC_DEBUG as an alternative]</span>
f-&gt;file_id = H5Fcreate(file-&gt;file_name, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
<span style="color: #a020f0;">break</span>;
}
} <span style="color: #a020f0;">else</span> {
<span style="color: #a020f0;">switch</span> (file-&gt;mode) {
<span style="color: #a020f0;">case</span> <span style="color: #8b2252;">'r'</span>:
<span style="color: #a020f0;">case</span> <span style="color: #8b2252;">'a'</span>:
// <span style="color: #b22222;">reading or appending non-existing file -&gt; error</span>
<span style="color: #a020f0;">return</span> TREXIO_FAILURE;
<span style="color: #a020f0;">case</span> <span style="color: #8b2252;">'w'</span>:
// <span style="color: #b22222;">writing non-existing file -&gt; create it</span>
f-&gt;file_id = H5Fcreate(file-&gt;file_name, H5F_ACC_EXCL, H5P_DEFAULT, H5P_DEFAULT);
<span style="color: #a020f0;">break</span>;
}
}
/* <span style="color: #b22222;">Create or open groups in the hdf5 file assuming that they exist if file exists </span>*/
<span style="color: #a020f0;">switch</span> (file-&gt;mode) {
// <span style="color: #b22222;">the switch for 'r'/'a' is reached only if file exists</span>
<span style="color: #a020f0;">case</span> <span style="color: #8b2252;">'r'</span>:
<span style="color: #a020f0;">case</span> <span style="color: #8b2252;">'a'</span>:
f-&gt;$group$_group = H5Gopen(f-&gt;file_id, $GROUP$_GROUP_NAME, H5P_DEFAULT);
<span style="color: #a020f0;">break</span>;
<span style="color: #a020f0;">case</span> <span style="color: #8b2252;">'w'</span>:
f-&gt;$group$_group = H5Gcreate(f-&gt;file_id, $GROUP$_GROUP_NAME, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
<span style="color: #a020f0;">break</span>;
}
<span style="color: #a020f0;">if</span> (f-&gt;$group$_group &lt;= 0L) <span style="color: #a020f0;">return</span> TREXIO_INVALID_ID;
<span style="color: #a020f0;">return</span> TREXIO_SUCCESS;
}
<span style="color: #228b22;">trexio_exit_code</span>
<span style="color: #0000ff;">trexio_hdf5_deinit</span> (<span style="color: #228b22;">trexio_t</span>* <span style="color: #a020f0;">const</span> <span style="color: #a0522d;">file</span>)
{
<span style="color: #228b22;">trexio_hdf5_t</span>* <span style="color: #a0522d;">f</span> = (<span style="color: #228b22;">trexio_hdf5_t</span>*) file;
H5Gclose(f-&gt;$group$_group);
f-&gt;$group$_group = 0;
H5Fclose(f-&gt;file_id);
f-&gt;file_id = 0;
<span style="color: #a020f0;">return</span> TREXIO_SUCCESS;
}
</pre>
</div>
</div>
</div>
<div id="outline-container-org74ba7cb" class="outline-3">
<h3 id="org74ba7cb"><span class="section-number-3">1.4</span> Template for HDF5 has/read/write a number</h3>
<div class="outline-text-3" id="text-1-4">
<div class="org-src-container">
<pre class="src src-c"><span style="color: #228b22;">trexio_exit_code</span>
<span style="color: #0000ff;">trexio_hdf5_read_$group_num$</span> (<span style="color: #228b22;">trexio_t</span>* <span style="color: #a020f0;">const</span> <span style="color: #a0522d;">file</span>, <span style="color: #228b22;">uint64_t</span>* <span style="color: #a020f0;">const</span> <span style="color: #a0522d;">num</span>)
{
<span style="color: #a020f0;">if</span> (file == <span style="color: #008b8b;">NULL</span>) <span style="color: #a020f0;">return</span> TREXIO_INVALID_ARG_1;
<span style="color: #a020f0;">if</span> (num == <span style="color: #008b8b;">NULL</span>) <span style="color: #a020f0;">return</span> TREXIO_INVALID_ARG_2;
<span style="color: #a020f0;">const</span> <span style="color: #228b22;">trexio_hdf5_t</span>* <span style="color: #a0522d;">f</span> = (<span style="color: #a020f0;">const</span> <span style="color: #228b22;">trexio_hdf5_t</span>*) file;
/* <span style="color: #b22222;">Quit if the dimensioning attribute is missing in the file </span>*/
<span style="color: #a020f0;">if</span> (H5Aexists(f-&gt;$group$_group, $GROUP_NUM$_NAME) == 0) <span style="color: #a020f0;">return</span> TREXIO_FAILURE;
/* <span style="color: #b22222;">Read the nucleus_num attribute of nucleus group </span>*/
<span style="color: #a020f0;">const</span> <span style="color: #228b22;">hid_t</span> <span style="color: #a0522d;">num_id</span> = H5Aopen(f-&gt;$group$_group, $GROUP_NUM$_NAME, H5P_DEFAULT);
<span style="color: #a020f0;">if</span> (num_id &lt;= 0) <span style="color: #a020f0;">return</span> TREXIO_INVALID_ID;
<span style="color: #a020f0;">const</span> <span style="color: #228b22;">herr_t</span> <span style="color: #a0522d;">status</span> = H5Aread(num_id, H5T_NATIVE_ULLONG, num);
<span style="color: #a020f0;">if</span> (status &lt; 0) <span style="color: #a020f0;">return</span> TREXIO_FAILURE;
<span style="color: #a020f0;">return</span> TREXIO_SUCCESS;
}
</pre>
</div>
<div class="org-src-container">
<pre class="src src-c"><span style="color: #228b22;">trexio_exit_code</span>
<span style="color: #0000ff;">trexio_hdf5_write_$group_num$</span> (<span style="color: #228b22;">trexio_t</span>* <span style="color: #a020f0;">const</span> <span style="color: #a0522d;">file</span>, <span style="color: #a020f0;">const</span> <span style="color: #228b22;">uint64_t</span> <span style="color: #a0522d;">num</span>)
{
<span style="color: #a020f0;">if</span> (file == <span style="color: #008b8b;">NULL</span>) <span style="color: #a020f0;">return</span> TREXIO_INVALID_ARG_1;
<span style="color: #a020f0;">if</span> (num == 0L ) <span style="color: #a020f0;">return</span> TREXIO_INVALID_ARG_2;
<span style="color: #228b22;">trexio_hdf5_t</span>* <span style="color: #a020f0;">const</span> <span style="color: #a0522d;">f</span> = (<span style="color: #228b22;">trexio_hdf5_t</span>*) file;
<span style="color: #a020f0;">if</span> (H5Aexists(f-&gt;$group$_group, $GROUP_NUM$_NAME) == 0) {
/* <span style="color: #b22222;">Write the dimensioning variables </span>*/
<span style="color: #a020f0;">const</span> <span style="color: #228b22;">hid_t</span> <span style="color: #a0522d;">dtype</span> = H5Tcopy(H5T_NATIVE_ULLONG);
<span style="color: #a020f0;">const</span> <span style="color: #228b22;">hid_t</span> <span style="color: #a0522d;">dspace</span> = H5Screate(H5S_SCALAR);
<span style="color: #a020f0;">const</span> <span style="color: #228b22;">hid_t</span> <span style="color: #a0522d;">num_id</span> = H5Acreate(f-&gt;$group$_group, $GROUP_NUM$_NAME, dtype, dspace,
H5P_DEFAULT, H5P_DEFAULT);
<span style="color: #a020f0;">if</span> (num_id &lt;= 0) {
H5Sclose(dspace);
H5Tclose(dtype);
<span style="color: #a020f0;">return</span> TREXIO_INVALID_ID;
}
<span style="color: #a020f0;">const</span> <span style="color: #228b22;">herr_t</span> <span style="color: #a0522d;">status</span> = H5Awrite(num_id, dtype, &amp;(num));
<span style="color: #a020f0;">if</span> (status &lt; 0) {
H5Aclose(num_id);
H5Sclose(dspace);
H5Tclose(dtype);
<span style="color: #a020f0;">return</span> TREXIO_FAILURE;
}
H5Sclose(dspace);
H5Aclose(num_id);
H5Tclose(dtype);
<span style="color: #a020f0;">return</span> TREXIO_SUCCESS;
} <span style="color: #a020f0;">else</span> {
<span style="color: #228b22;">uint64_t</span> <span style="color: #a0522d;">infile_num</span>;
<span style="color: #228b22;">trexio_exit_code</span> <span style="color: #a0522d;">rc</span> = trexio_hdf5_read_$group_num$(file, &amp;(infile_num));
<span style="color: #a020f0;">if</span> (rc != TREXIO_SUCCESS) <span style="color: #a020f0;">return</span> rc;
<span style="color: #a020f0;">if</span> (infile_num != num) {
<span style="color: #a020f0;">if</span> (infile_num != 0) {
printf(<span style="color: #8b2252;">"%lu -&gt; %lu %s \n"</span>, num, infile_num,
<span style="color: #8b2252;">"This variable already exists. Overwriting it is not supported"</span>);
<span style="color: #a020f0;">return</span> TREXIO_FAILURE;
} <span style="color: #a020f0;">else</span> {
<span style="color: #a020f0;">const</span> <span style="color: #228b22;">hid_t</span> <span style="color: #a0522d;">dtype</span> = H5Tcopy(H5T_NATIVE_ULLONG);
<span style="color: #a020f0;">const</span> <span style="color: #228b22;">hid_t</span> <span style="color: #a0522d;">num_id</span> = H5Aopen(f-&gt;$group$_group, $GROUP_NUM$_NAME, H5P_DEFAULT);
<span style="color: #a020f0;">if</span> (num_id &lt;= 0) <span style="color: #a020f0;">return</span> TREXIO_INVALID_ID;
<span style="color: #a020f0;">const</span> <span style="color: #228b22;">herr_t</span> <span style="color: #a0522d;">status</span> = H5Awrite(num_id, dtype, &amp;(num));
<span style="color: #a020f0;">if</span> (status &lt; 0) <span style="color: #a020f0;">return</span> TREXIO_FAILURE;
H5Aclose(num_id);
H5Tclose(dtype);
}
}
<span style="color: #a020f0;">return</span> TREXIO_SUCCESS;
}
}
</pre>
</div>
<div class="org-src-container">
<pre class="src src-c"><span style="color: #228b22;">trexio_exit_code</span>
<span style="color: #0000ff;">trexio_hdf5_has_$group_num$</span> (<span style="color: #228b22;">trexio_t</span>* <span style="color: #a020f0;">const</span> <span style="color: #a0522d;">file</span>)
{
<span style="color: #a020f0;">if</span> (file == <span style="color: #008b8b;">NULL</span>) <span style="color: #a020f0;">return</span> TREXIO_INVALID_ARG_1;
<span style="color: #a020f0;">const</span> <span style="color: #228b22;">trexio_hdf5_t</span>* <span style="color: #a0522d;">f</span> = (<span style="color: #a020f0;">const</span> <span style="color: #228b22;">trexio_hdf5_t</span>*) file;
<span style="color: #228b22;">htri_t</span> <span style="color: #a0522d;">status</span> = H5Aexists(f-&gt;$group$_group, $GROUP_NUM$_NAME);
/* <span style="color: #b22222;">H5Aexists returns positive value if attribute exists, 0 if does not, negative if error </span>*/
<span style="color: #a020f0;">if</span> (status &gt; 0){
<span style="color: #a020f0;">return</span> TREXIO_SUCCESS;
} <span style="color: #a020f0;">else</span> <span style="color: #a020f0;">if</span> (status == 0) {
<span style="color: #a020f0;">return</span> TREXIO_HAS_NOT;
} <span style="color: #a020f0;">else</span> {
<span style="color: #a020f0;">return</span> TREXIO_FAILURE;
}
}
</pre>
</div>
</div>
</div>
<div id="outline-container-org01b35d3" class="outline-3">
<h3 id="org01b35d3"><span class="section-number-3">1.5</span> Template for HDF5 has/read/write a dataset</h3>
<div class="outline-text-3" id="text-1-5">
<div class="org-src-container">
<pre class="src src-c"><span style="color: #228b22;">trexio_exit_code</span>
<span style="color: #0000ff;">trexio_hdf5_read_$group$_$group_dset$</span> (<span style="color: #228b22;">trexio_t</span>* <span style="color: #a020f0;">const</span> <span style="color: #a0522d;">file</span>, $group_dset_dtype$* <span style="color: #a020f0;">const</span> $group_dset$,
<span style="color: #a020f0;">const</span> <span style="color: #228b22;">uint32_t</span> <span style="color: #a0522d;">rank</span>, <span style="color: #a020f0;">const</span> <span style="color: #228b22;">uint64_t</span>* <span style="color: #a0522d;">dims</span>)
{
<span style="color: #a020f0;">if</span> (file == <span style="color: #008b8b;">NULL</span>) <span style="color: #a020f0;">return</span> TREXIO_INVALID_ARG_1;
<span style="color: #a020f0;">if</span> ($group_dset$ == <span style="color: #008b8b;">NULL</span>) <span style="color: #a020f0;">return</span> TREXIO_INVALID_ARG_2;
<span style="color: #a020f0;">const</span> <span style="color: #228b22;">trexio_hdf5_t</span>* <span style="color: #a0522d;">f</span> = (<span style="color: #a020f0;">const</span> <span style="color: #228b22;">trexio_hdf5_t</span>*) file;
<span style="color: #228b22;">herr_t</span> <span style="color: #a0522d;">status</span>;
<span style="color: #228b22;">int</span> <span style="color: #a0522d;">rrank</span>;
// <span style="color: #b22222;">get the rank of the dataset in a file</span>
status = H5LTget_dataset_ndims (f-&gt;$group$_group, $GROUP$_$GROUP_DSET$_NAME,
&amp;rrank);
<span style="color: #a020f0;">if</span> (status &lt; 0) <span style="color: #a020f0;">return</span> TREXIO_FAILURE;
<span style="color: #a020f0;">if</span> (rrank != (<span style="color: #228b22;">int</span>) rank) <span style="color: #a020f0;">return</span> TREXIO_INVALID_ARG_3;
// <span style="color: #b22222;">open the dataset to get its dimensions</span>
<span style="color: #228b22;">hid_t</span> <span style="color: #a0522d;">dset_id</span> = H5Dopen(f-&gt;$group$_group, $GROUP$_$GROUP_DSET$_NAME, H5P_DEFAULT);
<span style="color: #a020f0;">if</span> (dset_id &lt;= 0) <span style="color: #a020f0;">return</span> TREXIO_INVALID_ID;
// <span style="color: #b22222;">allocate space for the dimensions to be read</span>
<span style="color: #228b22;">hsize_t</span>* <span style="color: #a0522d;">ddims</span> = CALLOC( (<span style="color: #228b22;">int</span>) rank, hsize_t);
<span style="color: #a020f0;">if</span> (ddims == <span style="color: #008b8b;">NULL</span>) <span style="color: #a020f0;">return</span> TREXIO_FAILURE;
// <span style="color: #b22222;">read dimensions from the existing dataset</span>
status = H5LDget_dset_dims(dset_id, ddims);
H5Dclose(dset_id);
<span style="color: #a020f0;">if</span> (status &lt; 0) {
free(ddims);
<span style="color: #a020f0;">return</span> TREXIO_FAILURE;
}
<span style="color: #a020f0;">for</span> (<span style="color: #228b22;">uint32_t</span> <span style="color: #a0522d;">i</span>=0; i&lt;rank; ++i){
<span style="color: #a020f0;">if</span> (ddims[i] != dims[i]) {
free(ddims);
<span style="color: #a020f0;">return</span> TREXIO_INVALID_ARG_4;
}
}
free(ddims);
/* <span style="color: #b22222;">High-level H5LT API. No need to deal with dataspaces and datatypes </span>*/
status = H5LTread_dataset_$group_dset_h5_dtype$(f-&gt;$group$_group,
$GROUP$_$GROUP_DSET$_NAME,
$group_dset$);
<span style="color: #a020f0;">if</span> (status &lt; 0) <span style="color: #a020f0;">return</span> TREXIO_FAILURE;
<span style="color: #a020f0;">return</span> TREXIO_SUCCESS;
}
</pre>
</div>
<div class="org-src-container">
<pre class="src src-c"><span style="color: #228b22;">trexio_exit_code</span>
<span style="color: #0000ff;">trexio_hdf5_write_$group$_$group_dset$</span> (<span style="color: #228b22;">trexio_t</span>* <span style="color: #a020f0;">const</span> <span style="color: #a0522d;">file</span>, <span style="color: #a020f0;">const</span> $group_dset_dtype$* $group_dset$,
<span style="color: #a020f0;">const</span> <span style="color: #228b22;">uint32_t</span> <span style="color: #a0522d;">rank</span>, <span style="color: #a020f0;">const</span> <span style="color: #228b22;">uint64_t</span>* <span style="color: #a0522d;">dims</span>)
{
<span style="color: #a020f0;">if</span> (file == <span style="color: #008b8b;">NULL</span>) <span style="color: #a020f0;">return</span> TREXIO_INVALID_ARG_1;
<span style="color: #a020f0;">if</span> ($group_dset$ == <span style="color: #008b8b;">NULL</span>) <span style="color: #a020f0;">return</span> TREXIO_INVALID_ARG_2;
<span style="color: #228b22;">trexio_exit_code</span> <span style="color: #a0522d;">rc</span>;
uint64_t $group_dset_dim$;
// <span style="color: #b22222;">error handling for rc is added by the generator</span>
rc = trexio_hdf5_read_$group_dset_dim$(file, &amp;($group_dset_dim$));
<span style="color: #a020f0;">if</span> ($group_dset_dim$ == 0L) <span style="color: #a020f0;">return</span> TREXIO_INVALID_NUM;
<span style="color: #228b22;">trexio_hdf5_t</span>* <span style="color: #a0522d;">f</span> = (<span style="color: #228b22;">trexio_hdf5_t</span>*) file;
<span style="color: #a020f0;">if</span> ( H5LTfind_dataset(f-&gt;$group$_group, $GROUP$_$GROUP_DSET$_NAME) != 1) {
<span style="color: #a020f0;">const</span> <span style="color: #228b22;">herr_t</span> <span style="color: #a0522d;">status</span> =
H5LTmake_dataset_$group_dset_h5_dtype$ (f-&gt;$group$_group, $GROUP$_$GROUP_DSET$_NAME,
(<span style="color: #228b22;">int</span>) rank, (<span style="color: #a020f0;">const</span> <span style="color: #228b22;">hsize_t</span>*) dims, $group_dset$);
<span style="color: #a020f0;">if</span> (status &lt; 0) <span style="color: #a020f0;">return</span> TREXIO_FAILURE;
} <span style="color: #a020f0;">else</span> {
<span style="color: #228b22;">hid_t</span> <span style="color: #a0522d;">dset_id</span> = H5Dopen(f-&gt;$group$_group, $GROUP$_$GROUP_DSET$_NAME, H5P_DEFAULT);
<span style="color: #a020f0;">if</span> (dset_id &lt;= 0) <span style="color: #a020f0;">return</span> TREXIO_INVALID_ID;
<span style="color: #a020f0;">const</span> <span style="color: #228b22;">herr_t</span> <span style="color: #a0522d;">status</span> =
H5Dwrite(dset_id, H5T_NATIVE_$GROUP_DSET_H5_DTYPE$, H5S_ALL, H5S_ALL,
H5P_DEFAULT, $group_dset$);
H5Dclose(dset_id);
<span style="color: #a020f0;">if</span> (status &lt; 0) <span style="color: #a020f0;">return</span> TREXIO_FAILURE;
}
<span style="color: #a020f0;">return</span> TREXIO_SUCCESS;
}
</pre>
</div>
<div class="org-src-container">
<pre class="src src-c"><span style="color: #228b22;">trexio_exit_code</span>
<span style="color: #0000ff;">trexio_hdf5_has_$group$_$group_dset$</span> (<span style="color: #228b22;">trexio_t</span>* <span style="color: #a020f0;">const</span> <span style="color: #a0522d;">file</span>)
{
<span style="color: #a020f0;">if</span> (file == <span style="color: #008b8b;">NULL</span>) <span style="color: #a020f0;">return</span> TREXIO_INVALID_ARG_1;
<span style="color: #228b22;">trexio_hdf5_t</span>* <span style="color: #a0522d;">f</span> = (<span style="color: #228b22;">trexio_hdf5_t</span>*) file;
<span style="color: #228b22;">herr_t</span> <span style="color: #a0522d;">status</span> = H5LTfind_dataset(f-&gt;$group$_group, $GROUP$_$GROUP_DSET$_NAME);
/* <span style="color: #b22222;">H5LTfind_dataset returns 1 if dataset exists, 0 otherwise </span>*/
<span style="color: #a020f0;">if</span> (status == 1){
<span style="color: #a020f0;">return</span> TREXIO_SUCCESS;
} <span style="color: #a020f0;">else</span> <span style="color: #a020f0;">if</span> (status == 0) {
<span style="color: #a020f0;">return</span> TREXIO_HAS_NOT;
} <span style="color: #a020f0;">else</span> {
<span style="color: #a020f0;">return</span> TREXIO_FAILURE;
}
}
</pre>
</div>
</div>
</div>
</div>
</div>
<div id="postamble" class="status">
<p class="author">Author: TREX-CoE</p>
<p class="date">Created: 2021-04-12 Mon 12:32</p>
<p class="validation"><a href="http://validator.w3.org/check?uri=referer">Validate</a></p>
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