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763 lines
26 KiB
HTML
763 lines
26 KiB
HTML
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through which recipients can access the Corresponding Source.
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Copyright (C) 2012-2020 Free Software Foundation, Inc.
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any later version. The code is distributed WITHOUT ANY WARRANTY;
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without even the implied warranty of MERCHANTABILITY or FITNESS
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may distribute non-source (e.g., minimized or compacted) forms of
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that code without the copy of the GNU GPL normally required by
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section 4, provided you include this license notice and a URL
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through which recipients can access the Corresponding Source.
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</head>
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<body>
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<div id="org-div-home-and-up">
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<a accesskey="h" href=""> UP </a>
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<a accesskey="H" href="index.html"> HOME </a>
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</div><div id="content">
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<h1 class="title">Error handling</h1>
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<div id="table-of-contents">
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<h2>Table of Contents</h2>
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<div id="text-table-of-contents">
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<ul>
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<li><a href="#orgfc41820">-</a></li>
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<li><a href="#org7e4b898">1. Decoding errors</a></li>
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<li><a href="#orgeec5540">2. Data structure in context</a></li>
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<li><a href="#orgec4eb9d">3. Updating errors in the context</a></li>
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<li><a href="#org137e1a5">4. Get the error</a></li>
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<li><a href="#org50b5768">5. Failing</a></li>
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<li><a href="#orgd3270e3">6. Last error</a>
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<ul>
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<li><a href="#org0077765">6.1. Fortran inteface</a></li>
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</ul>
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</li>
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<li><a href="#orgd0789d8">7. Helper functions for debugging</a>
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<ul>
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<li><a href="#orgc9cbb97">7.1. Fortran inteface</a></li>
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</ul>
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</li>
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</ul>
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</div>
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</div>
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<div id="outline-container-orgfc41820" class="outline-2">
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<h2 id="orgfc41820">-</h2>
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<div class="outline-text-2" id="text-orgfc41820">
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<p>
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The library should never make the calling programs abort, nor
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perform any input/output operations. This decision has to be taken
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by the developer of the code calling the library.
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</p>
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<p>
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All the functions return with an exit code, defined as
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</p>
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<div class="org-src-container">
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<pre class="src src-c" id="orgcca29a5"><span style="color: #a020f0;">typedef</span> <span style="color: #228b22;">int32_t</span> <span style="color: #228b22;">qmckl_exit_code</span>;
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</pre>
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</div>
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<p>
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The exit code returns the completion status of the function to the
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calling program. When a function call completed successfully,
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<code>QMCKL_SUCCESS</code> is returned. If one of the functions of
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the library fails to complete the requested task, an appropriate
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error code is returned to the program.
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</p>
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<p>
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Here is the complete list of exit codes.
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</p>
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<table id="org8ee7a6c" border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
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<col class="org-left" />
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</colgroup>
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<thead>
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<tr>
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<th scope="col" class="org-left">Macro</th>
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<th scope="col" class="org-right">Code</th>
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<th scope="col" class="org-left">Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td class="org-left"><code>QMCKL_SUCCESS</code></td>
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<td class="org-right">0</td>
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<td class="org-left">'Success'</td>
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</tr>
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<tr>
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<td class="org-left"><code>QMCKL_INVALID_ARG_1</code></td>
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<td class="org-right">1</td>
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<td class="org-left">'Invalid argument 1'</td>
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</tr>
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<tr>
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<td class="org-left"><code>QMCKL_INVALID_ARG_2</code></td>
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<td class="org-right">2</td>
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<td class="org-left">'Invalid argument 2'</td>
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</tr>
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<tr>
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<td class="org-left"><code>QMCKL_INVALID_ARG_3</code></td>
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<td class="org-right">3</td>
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<td class="org-left">'Invalid argument 3'</td>
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</tr>
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<tr>
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<td class="org-left"><code>QMCKL_INVALID_ARG_4</code></td>
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<td class="org-right">4</td>
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<td class="org-left">'Invalid argument 4'</td>
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</tr>
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<tr>
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<td class="org-left"><code>QMCKL_INVALID_ARG_5</code></td>
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<td class="org-right">5</td>
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<td class="org-left">'Invalid argument 5'</td>
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</tr>
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<tr>
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<td class="org-left"><code>QMCKL_INVALID_ARG_6</code></td>
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<td class="org-right">6</td>
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<td class="org-left">'Invalid argument 6'</td>
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</tr>
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<tr>
|
|
<td class="org-left"><code>QMCKL_INVALID_ARG_7</code></td>
|
|
<td class="org-right">7</td>
|
|
<td class="org-left">'Invalid argument 7'</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left"><code>QMCKL_INVALID_ARG_8</code></td>
|
|
<td class="org-right">8</td>
|
|
<td class="org-left">'Invalid argument 8'</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left"><code>QMCKL_INVALID_ARG_9</code></td>
|
|
<td class="org-right">9</td>
|
|
<td class="org-left">'Invalid argument 9'</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left"><code>QMCKL_INVALID_ARG_10</code></td>
|
|
<td class="org-right">10</td>
|
|
<td class="org-left">'Invalid argument 10'</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left"><code>QMCKL_INVALID_ARG_11</code></td>
|
|
<td class="org-right">11</td>
|
|
<td class="org-left">'Invalid argument 11'</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left"><code>QMCKL_INVALID_ARG_12</code></td>
|
|
<td class="org-right">12</td>
|
|
<td class="org-left">'Invalid argument 12'</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left"><code>QMCKL_INVALID_ARG_13</code></td>
|
|
<td class="org-right">13</td>
|
|
<td class="org-left">'Invalid argument 13'</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left"><code>QMCKL_INVALID_ARG_14</code></td>
|
|
<td class="org-right">14</td>
|
|
<td class="org-left">'Invalid argument 14'</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left"><code>QMCKL_INVALID_ARG_15</code></td>
|
|
<td class="org-right">15</td>
|
|
<td class="org-left">'Invalid argument 15'</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left"><code>QMCKL_INVALID_ARG_16</code></td>
|
|
<td class="org-right">16</td>
|
|
<td class="org-left">'Invalid argument 16'</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left"><code>QMCKL_INVALID_ARG_17</code></td>
|
|
<td class="org-right">17</td>
|
|
<td class="org-left">'Invalid argument 17'</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left"><code>QMCKL_INVALID_ARG_18</code></td>
|
|
<td class="org-right">18</td>
|
|
<td class="org-left">'Invalid argument 18'</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left"><code>QMCKL_INVALID_ARG_19</code></td>
|
|
<td class="org-right">19</td>
|
|
<td class="org-left">'Invalid argument 19'</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left"><code>QMCKL_INVALID_ARG_20</code></td>
|
|
<td class="org-right">20</td>
|
|
<td class="org-left">'Invalid argument 20'</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left"><code>QMCKL_FAILURE</code></td>
|
|
<td class="org-right">101</td>
|
|
<td class="org-left">'Failure'</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left"><code>QMCKL_ERRNO</code></td>
|
|
<td class="org-right">102</td>
|
|
<td class="org-left">strerror(errno)</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left"><code>QMCKL_INVALID_CONTEXT</code></td>
|
|
<td class="org-right">103</td>
|
|
<td class="org-left">'Invalid context'</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left"><code>QMCKL_ALLOCATION_FAILED</code></td>
|
|
<td class="org-right">104</td>
|
|
<td class="org-left">'Allocation failed'</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left"><code>QMCKL_DEALLOCATION_FAILED</code></td>
|
|
<td class="org-right">105</td>
|
|
<td class="org-left">'De-allocation failed'</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left"><code>QMCKL_NOT_PROVIDED</code></td>
|
|
<td class="org-right">106</td>
|
|
<td class="org-left">'Not provided'</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left"><code>QMCKL_OUT_OF_BOUNDS</code></td>
|
|
<td class="org-right">107</td>
|
|
<td class="org-left">'Index out of bounds'</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left"><code>QMCKL_ALREADY_SET</code></td>
|
|
<td class="org-right">108</td>
|
|
<td class="org-left">'Already set'</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td class="org-left"><code>QMCKL_INVALID_EXIT_CODE</code></td>
|
|
<td class="org-right">109</td>
|
|
<td class="org-left">'Invalid exit code'</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
|
|
<p>
|
|
The <code>qmckl_string_of_error</code> converts an exit code into a string. The
|
|
string is assumed to be large enough to contain the error message
|
|
(typically 128 characters).
|
|
</p>
|
|
</div>
|
|
</div>
|
|
|
|
<div id="outline-container-org7e4b898" class="outline-2">
|
|
<h2 id="org7e4b898"><span class="section-number-2">1</span> Decoding errors</h2>
|
|
<div class="outline-text-2" id="text-1">
|
|
<p>
|
|
To decode the error messages, <code>qmckl_string_of_error</code> converts an
|
|
error code into a string.
|
|
</p>
|
|
|
|
<div class="org-src-container">
|
|
<pre class="src src-c"><span style="color: #a020f0;">const</span> <span style="color: #228b22;">char</span>*
|
|
<span style="color: #0000ff;">qmckl_string_of_error</span> (<span style="color: #a020f0;">const</span> <span style="color: #228b22;">qmckl_exit_code</span> <span style="color: #a0522d;">error</span>);
|
|
</pre>
|
|
</div>
|
|
|
|
<p>
|
|
The text strings are extracted from the previous table.
|
|
</p>
|
|
</div>
|
|
</div>
|
|
<div id="outline-container-orgeec5540" class="outline-2">
|
|
<h2 id="orgeec5540"><span class="section-number-2">2</span> Data structure in context</h2>
|
|
<div class="outline-text-2" id="text-2">
|
|
<p>
|
|
The strings are declared internally with a maximum fixed size to avoid
|
|
dynamic memory allocation.
|
|
</p>
|
|
|
|
<div class="org-src-container">
|
|
<pre class="src src-c"><span style="color: #483d8b;">#define</span> <span style="color: #a0522d;">QMCKL_MAX_FUN_LEN</span> 256
|
|
<span style="color: #483d8b;">#define</span> <span style="color: #a0522d;">QMCKL_MAX_MSG_LEN</span> 1024
|
|
|
|
<span style="color: #a020f0;">typedef</span> <span style="color: #a020f0;">struct</span> <span style="color: #228b22;">qmckl_error_struct</span> {
|
|
|
|
<span style="color: #228b22;">qmckl_exit_code</span> <span style="color: #a0522d;">exit_code</span>;
|
|
<span style="color: #228b22;">char</span> <span style="color: #a0522d;">function</span>[QMCKL_MAX_FUN_LEN];
|
|
<span style="color: #228b22;">char</span> <span style="color: #a0522d;">message</span> [QMCKL_MAX_MSG_LEN];
|
|
|
|
} <span style="color: #228b22;">qmckl_error_struct</span>;
|
|
</pre>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
|
|
<div id="outline-container-orgec4eb9d" class="outline-2">
|
|
<h2 id="orgec4eb9d"><span class="section-number-2">3</span> Updating errors in the context</h2>
|
|
<div class="outline-text-2" id="text-3">
|
|
<p>
|
|
The error is updated in the context using <code>qmckl_set_error</code>.
|
|
When the error is set in the context, it is mandatory to specify
|
|
from which function the error is triggered, and a message
|
|
explaining the error. The exit code can't be <code>QMCKL_SUCCESS</code>.
|
|
</p>
|
|
|
|
<div class="org-src-container">
|
|
<pre class="src src-c"><span style="color: #228b22;">qmckl_exit_code</span>
|
|
<span style="color: #0000ff;">qmckl_set_error</span>(<span style="color: #228b22;">qmckl_context</span> <span style="color: #a0522d;">context</span>,
|
|
<span style="color: #a020f0;">const</span> <span style="color: #228b22;">qmckl_exit_code</span> <span style="color: #a0522d;">exit_code</span>,
|
|
<span style="color: #a020f0;">const</span> <span style="color: #228b22;">char</span>* <span style="color: #a0522d;">function_name</span>,
|
|
<span style="color: #a020f0;">const</span> <span style="color: #228b22;">char</span>* <span style="color: #a0522d;">message</span>);
|
|
</pre>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div id="outline-container-org137e1a5" class="outline-2">
|
|
<h2 id="org137e1a5"><span class="section-number-2">4</span> Get the error</h2>
|
|
<div class="outline-text-2" id="text-4">
|
|
<p>
|
|
Upon error, the error type and message can be obtained from the
|
|
context using <code>qmckl_get_error</code>. The message and function name
|
|
is returned in the variables provided. Therefore, passing a
|
|
function name and message is mandatory.
|
|
</p>
|
|
|
|
<div class="org-src-container">
|
|
<pre class="src src-c"><span style="color: #228b22;">qmckl_exit_code</span>
|
|
<span style="color: #0000ff;">qmckl_get_error</span>(<span style="color: #228b22;">qmckl_context</span> <span style="color: #a0522d;">context</span>,
|
|
<span style="color: #228b22;">qmckl_exit_code</span> *<span style="color: #a0522d;">exit_code</span>,
|
|
<span style="color: #228b22;">char</span>* <span style="color: #a0522d;">function_name</span>,
|
|
<span style="color: #228b22;">char</span>* <span style="color: #a0522d;">message</span>);
|
|
</pre>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div id="outline-container-org50b5768" class="outline-2">
|
|
<h2 id="org50b5768"><span class="section-number-2">5</span> Failing</h2>
|
|
<div class="outline-text-2" id="text-5">
|
|
<p>
|
|
To make a function fail, the <code>qmckl_failwith</code> function should be
|
|
called, such that information about the failure is stored in
|
|
the context. The desired exit code is given as an argument, as
|
|
well as the name of the function and an error message. If the
|
|
message is <code>NULL</code>, then the default message obtained by
|
|
<code>qmckl_string_of_error</code> is used. The return code of the function is
|
|
the desired return code.
|
|
Upon failure, a <code>QMCKL_NULL_CONTEXT</code> is returned.
|
|
</p>
|
|
|
|
<div class="org-src-container">
|
|
<pre class="src src-c"><span style="color: #228b22;">qmckl_exit_code</span>
|
|
<span style="color: #0000ff;">qmckl_failwith</span>(<span style="color: #228b22;">qmckl_context</span> <span style="color: #a0522d;">context</span>,
|
|
<span style="color: #a020f0;">const</span> <span style="color: #228b22;">qmckl_exit_code</span> <span style="color: #a0522d;">exit_code</span>,
|
|
<span style="color: #a020f0;">const</span> <span style="color: #228b22;">char</span>* <span style="color: #a0522d;">function</span>,
|
|
<span style="color: #a020f0;">const</span> <span style="color: #228b22;">char</span>* <span style="color: #a0522d;">message</span>) ;
|
|
</pre>
|
|
</div>
|
|
|
|
<p>
|
|
For example, this function can be used as
|
|
</p>
|
|
<div class="org-src-container">
|
|
<pre class="src src-c"><span style="color: #a020f0;">if</span> (x < 0) {
|
|
<span style="color: #a020f0;">return</span> qmckl_failwith(context,
|
|
QMCKL_INVALID_ARG_2,
|
|
<span style="color: #8b2252;">"qmckl_function"</span>,
|
|
<span style="color: #8b2252;">"Expected x >= 0"</span>);
|
|
}
|
|
</pre>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
|
|
<div id="outline-container-orgd3270e3" class="outline-2">
|
|
<h2 id="orgd3270e3"><span class="section-number-2">6</span> Last error</h2>
|
|
<div class="outline-text-2" id="text-6">
|
|
<p>
|
|
Returns a string describing the last error, using <code>qmckl_get_error</code>.
|
|
</p>
|
|
|
|
<div class="org-src-container">
|
|
<pre class="src src-c"><span style="color: #228b22;">qmckl_exit_code</span>
|
|
<span style="color: #0000ff;">qmckl_last_error</span>(<span style="color: #228b22;">qmckl_context</span> <span style="color: #a0522d;">context</span>, <span style="color: #228b22;">char</span>* <span style="color: #a0522d;">buffer</span>);
|
|
</pre>
|
|
</div>
|
|
</div>
|
|
<div id="outline-container-org0077765" class="outline-3">
|
|
<h3 id="org0077765"><span class="section-number-3">6.1</span> Fortran inteface</h3>
|
|
</div>
|
|
</div>
|
|
|
|
<div id="outline-container-orgd0789d8" class="outline-2">
|
|
<h2 id="orgd0789d8"><span class="section-number-2">7</span> Helper functions for debugging</h2>
|
|
<div class="outline-text-2" id="text-7">
|
|
<p>
|
|
The following function prints to <code>stderr</code> an error message is the return code is
|
|
not <code>QMCKL_SUCCESS</code>.
|
|
</p>
|
|
|
|
<div class="org-src-container">
|
|
<pre class="src src-c"><span style="color: #228b22;">qmckl_exit_code</span>
|
|
<span style="color: #0000ff;">qmckl_check</span>(<span style="color: #228b22;">qmckl_context</span> <span style="color: #a0522d;">context</span>, <span style="color: #228b22;">qmckl_exit_code</span> <span style="color: #a0522d;">rc</span>);
|
|
</pre>
|
|
</div>
|
|
|
|
<p>
|
|
It should be used as:
|
|
</p>
|
|
|
|
<div class="org-src-container">
|
|
<pre class="src src-c">rc = qmckl_check(context,
|
|
qmckl_...(context, ...)
|
|
);
|
|
<span style="color: #0000ff;">assert</span> (rc == QMCKL_SUCCESS);
|
|
</pre>
|
|
</div>
|
|
</div>
|
|
|
|
<div id="outline-container-orgc9cbb97" class="outline-3">
|
|
<h3 id="orgc9cbb97"><span class="section-number-3">7.1</span> Fortran inteface</h3>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div id="postamble" class="status">
|
|
<p class="author">Author: TREX CoE</p>
|
|
<p class="date">Created: 2024-12-20 Fri 14:06</p>
|
|
<p class="validation"><a href="http://validator.w3.org/check?uri=referer">Validate</a></p>
|
|
</div>
|
|
</body>
|
|
</html>
|