1
0
mirror of https://github.com/TREX-CoE/qmckl.git synced 2024-06-01 10:55:36 +02:00
qmckl/qmckl_error.html

763 lines
26 KiB
HTML

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
<head>
<!-- 2024-03-29 Fri 08:29 -->
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>Error handling</title>
<meta name="generator" content="Org mode" />
<meta name="author" content="TREX CoE" />
<style type="text/css">
<!--/*--><![CDATA[/*><!--*/
.title { text-align: center;
margin-bottom: .2em; }
.subtitle { text-align: center;
font-size: medium;
font-weight: bold;
margin-top:0; }
.todo { font-family: monospace; color: red; }
.done { font-family: monospace; color: green; }
.priority { font-family: monospace; color: orange; }
.tag { background-color: #eee; font-family: monospace;
padding: 2px; font-size: 80%; font-weight: normal; }
.timestamp { color: #bebebe; }
.timestamp-kwd { color: #5f9ea0; }
.org-right { margin-left: auto; margin-right: 0px; text-align: right; }
.org-left { margin-left: 0px; margin-right: auto; text-align: left; }
.org-center { margin-left: auto; margin-right: auto; text-align: center; }
.underline { text-decoration: underline; }
#postamble p, #preamble p { font-size: 90%; margin: .2em; }
p.verse { margin-left: 3%; }
pre {
border: 1px solid #ccc;
box-shadow: 3px 3px 3px #eee;
padding: 8pt;
font-family: monospace;
overflow: auto;
margin: 1.2em;
}
pre.src {
position: relative;
overflow: visible;
padding-top: 1.2em;
}
pre.src:before {
display: none;
position: absolute;
background-color: white;
top: -10px;
right: 10px;
padding: 3px;
border: 1px solid black;
}
pre.src:hover:before { display: inline;}
/* Languages per Org manual */
pre.src-asymptote:before { content: 'Asymptote'; }
pre.src-awk:before { content: 'Awk'; }
pre.src-C:before { content: 'C'; }
/* pre.src-C++ doesn't work in CSS */
pre.src-clojure:before { content: 'Clojure'; }
pre.src-css:before { content: 'CSS'; }
pre.src-D:before { content: 'D'; }
pre.src-ditaa:before { content: 'ditaa'; }
pre.src-dot:before { content: 'Graphviz'; }
pre.src-calc:before { content: 'Emacs Calc'; }
pre.src-emacs-lisp:before { content: 'Emacs Lisp'; }
pre.src-fortran:before { content: 'Fortran'; }
pre.src-gnuplot:before { content: 'gnuplot'; }
pre.src-haskell:before { content: 'Haskell'; }
pre.src-hledger:before { content: 'hledger'; }
pre.src-java:before { content: 'Java'; }
pre.src-js:before { content: 'Javascript'; }
pre.src-latex:before { content: 'LaTeX'; }
pre.src-ledger:before { content: 'Ledger'; }
pre.src-lisp:before { content: 'Lisp'; }
pre.src-lilypond:before { content: 'Lilypond'; }
pre.src-lua:before { content: 'Lua'; }
pre.src-matlab:before { content: 'MATLAB'; }
pre.src-mscgen:before { content: 'Mscgen'; }
pre.src-ocaml:before { content: 'Objective Caml'; }
pre.src-octave:before { content: 'Octave'; }
pre.src-org:before { content: 'Org mode'; }
pre.src-oz:before { content: 'OZ'; }
pre.src-plantuml:before { content: 'Plantuml'; }
pre.src-processing:before { content: 'Processing.js'; }
pre.src-python:before { content: 'Python'; }
pre.src-R:before { content: 'R'; }
pre.src-ruby:before { content: 'Ruby'; }
pre.src-sass:before { content: 'Sass'; }
pre.src-scheme:before { content: 'Scheme'; }
pre.src-screen:before { content: 'Gnu Screen'; }
pre.src-sed:before { content: 'Sed'; }
pre.src-sh:before { content: 'shell'; }
pre.src-sql:before { content: 'SQL'; }
pre.src-sqlite:before { content: 'SQLite'; }
/* additional languages in org.el's org-babel-load-languages alist */
pre.src-forth:before { content: 'Forth'; }
pre.src-io:before { content: 'IO'; }
pre.src-J:before { content: 'J'; }
pre.src-makefile:before { content: 'Makefile'; }
pre.src-maxima:before { content: 'Maxima'; }
pre.src-perl:before { content: 'Perl'; }
pre.src-picolisp:before { content: 'Pico Lisp'; }
pre.src-scala:before { content: 'Scala'; }
pre.src-shell:before { content: 'Shell Script'; }
pre.src-ebnf2ps:before { content: 'ebfn2ps'; }
/* additional language identifiers per "defun org-babel-execute"
in ob-*.el */
pre.src-cpp:before { content: 'C++'; }
pre.src-abc:before { content: 'ABC'; }
pre.src-coq:before { content: 'Coq'; }
pre.src-groovy:before { content: 'Groovy'; }
/* additional language identifiers from org-babel-shell-names in
ob-shell.el: ob-shell is the only babel language using a lambda to put
the execution function name together. */
pre.src-bash:before { content: 'bash'; }
pre.src-csh:before { content: 'csh'; }
pre.src-ash:before { content: 'ash'; }
pre.src-dash:before { content: 'dash'; }
pre.src-ksh:before { content: 'ksh'; }
pre.src-mksh:before { content: 'mksh'; }
pre.src-posh:before { content: 'posh'; }
/* Additional Emacs modes also supported by the LaTeX listings package */
pre.src-ada:before { content: 'Ada'; }
pre.src-asm:before { content: 'Assembler'; }
pre.src-caml:before { content: 'Caml'; }
pre.src-delphi:before { content: 'Delphi'; }
pre.src-html:before { content: 'HTML'; }
pre.src-idl:before { content: 'IDL'; }
pre.src-mercury:before { content: 'Mercury'; }
pre.src-metapost:before { content: 'MetaPost'; }
pre.src-modula-2:before { content: 'Modula-2'; }
pre.src-pascal:before { content: 'Pascal'; }
pre.src-ps:before { content: 'PostScript'; }
pre.src-prolog:before { content: 'Prolog'; }
pre.src-simula:before { content: 'Simula'; }
pre.src-tcl:before { content: 'tcl'; }
pre.src-tex:before { content: 'TeX'; }
pre.src-plain-tex:before { content: 'Plain TeX'; }
pre.src-verilog:before { content: 'Verilog'; }
pre.src-vhdl:before { content: 'VHDL'; }
pre.src-xml:before { content: 'XML'; }
pre.src-nxml:before { content: 'XML'; }
/* add a generic configuration mode; LaTeX export needs an additional
(add-to-list 'org-latex-listings-langs '(conf " ")) in .emacs */
pre.src-conf:before { content: 'Configuration File'; }
table { border-collapse:collapse; }
caption.t-above { caption-side: top; }
caption.t-bottom { caption-side: bottom; }
td, th { vertical-align:top; }
th.org-right { text-align: center; }
th.org-left { text-align: center; }
th.org-center { text-align: center; }
td.org-right { text-align: right; }
td.org-left { text-align: left; }
td.org-center { text-align: center; }
dt { font-weight: bold; }
.footpara { display: inline; }
.footdef { margin-bottom: 1em; }
.figure { padding: 1em; }
.figure p { text-align: center; }
.equation-container {
display: table;
text-align: center;
width: 100%;
}
.equation {
vertical-align: middle;
}
.equation-label {
display: table-cell;
text-align: right;
vertical-align: middle;
}
.inlinetask {
padding: 10px;
border: 2px solid gray;
margin: 10px;
background: #ffffcc;
}
#org-div-home-and-up
{ text-align: right; font-size: 70%; white-space: nowrap; }
textarea { overflow-x: auto; }
.linenr { font-size: smaller }
.code-highlighted { background-color: #ffff00; }
.org-info-js_info-navigation { border-style: none; }
#org-info-js_console-label
{ font-size: 10px; font-weight: bold; white-space: nowrap; }
.org-info-js_search-highlight
{ background-color: #ffff00; color: #000000; font-weight: bold; }
.org-svg { width: 90%; }
/*]]>*/-->
</style>
<link rel="stylesheet" title="Standard" href="qmckl.css" type="text/css" />
<script type="text/javascript" src="org-info.js">
/**
*
* @source: org-info.js
*
* @licstart The following is the entire license notice for the
* JavaScript code in org-info.js.
*
* Copyright (C) 2012-2020 Free Software Foundation, Inc.
*
*
* The JavaScript code in this tag is free software: you can
* redistribute it and/or modify it under the terms of the GNU
* General Public License (GNU GPL) as published by the Free Software
* Foundation, either version 3 of the License, or (at your option)
* any later version. The code is distributed WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU GPL for more details.
*
* As additional permission under GNU GPL version 3 section 7, you
* may distribute non-source (e.g., minimized or compacted) forms of
* that code without the copy of the GNU GPL normally required by
* section 4, provided you include this license notice and a URL
* through which recipients can access the Corresponding Source.
*
* @licend The above is the entire license notice
* for the JavaScript code in org-info.js.
*
*/
</script>
<script type="text/javascript">
/*
@licstart The following is the entire license notice for the
JavaScript code in this tag.
Copyright (C) 2012-2020 Free Software Foundation, Inc.
The JavaScript code in this tag is free software: you can
redistribute it and/or modify it under the terms of the GNU
General Public License (GNU GPL) as published by the Free Software
Foundation, either version 3 of the License, or (at your option)
any later version. The code is distributed WITHOUT ANY WARRANTY;
without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU GPL for more details.
As additional permission under GNU GPL version 3 section 7, you
may distribute non-source (e.g., minimized or compacted) forms of
that code without the copy of the GNU GPL normally required by
section 4, provided you include this license notice and a URL
through which recipients can access the Corresponding Source.
@licend The above is the entire license notice
for the JavaScript code in this tag.
*/
<!--/*--><![CDATA[/*><!--*/
org_html_manager.set("TOC_DEPTH", "4");
org_html_manager.set("LINK_HOME", "index.html");
org_html_manager.set("LINK_UP", "");
org_html_manager.set("LOCAL_TOC", "1");
org_html_manager.set("VIEW_BUTTONS", "0");
org_html_manager.set("MOUSE_HINT", "underline");
org_html_manager.set("FIXED_TOC", "0");
org_html_manager.set("TOC", "1");
org_html_manager.set("VIEW", "info");
org_html_manager.setup(); // activate after the parameters are set
/*]]>*///-->
</script>
<script type="text/javascript">
/*
@licstart The following is the entire license notice for the
JavaScript code in this tag.
Copyright (C) 2012-2020 Free Software Foundation, Inc.
The JavaScript code in this tag is free software: you can
redistribute it and/or modify it under the terms of the GNU
General Public License (GNU GPL) as published by the Free Software
Foundation, either version 3 of the License, or (at your option)
any later version. The code is distributed WITHOUT ANY WARRANTY;
without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU GPL for more details.
As additional permission under GNU GPL version 3 section 7, you
may distribute non-source (e.g., minimized or compacted) forms of
that code without the copy of the GNU GPL normally required by
section 4, provided you include this license notice and a URL
through which recipients can access the Corresponding Source.
@licend The above is the entire license notice
for the JavaScript code in this tag.
*/
<!--/*--><![CDATA[/*><!--*/
function CodeHighlightOn(elem, id)
{
var target = document.getElementById(id);
if(null != target) {
elem.cacheClassElem = elem.className;
elem.cacheClassTarget = target.className;
target.className = "code-highlighted";
elem.className = "code-highlighted";
}
}
function CodeHighlightOff(elem, id)
{
var target = document.getElementById(id);
if(elem.cacheClassElem)
elem.className = elem.cacheClassElem;
if(elem.cacheClassTarget)
target.className = elem.cacheClassTarget;
}
/*]]>*///-->
</script>
</head>
<body>
<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">Error handling</h1>
<div id="table-of-contents">
<h2>Table of Contents</h2>
<div id="text-table-of-contents">
<ul>
<li><a href="#orgf83c839">-</a></li>
<li><a href="#orgcdf8fd0">1. Decoding errors</a></li>
<li><a href="#org3597000">2. Data structure in context</a></li>
<li><a href="#orgadd0e83">3. Updating errors in the context</a></li>
<li><a href="#org1dfc616">4. Get the error</a></li>
<li><a href="#org86c8c7d">5. Failing</a></li>
<li><a href="#org9e9f757">6. Last error</a>
<ul>
<li><a href="#org0190942">6.1. Fortran inteface</a></li>
</ul>
</li>
<li><a href="#orgd90433d">7. Helper functions for debugging</a>
<ul>
<li><a href="#org1a69c93">7.1. Fortran inteface</a></li>
</ul>
</li>
</ul>
</div>
</div>
<div id="outline-container-orgf83c839" class="outline-2">
<h2 id="orgf83c839">-</h2>
<div class="outline-text-2" id="text-orgf83c839">
<p>
The library should never make the calling programs abort, nor
perform any input/output operations. This decision has to be taken
by the developer of the code calling the library.
</p>
<p>
All the functions return with an exit code, defined as
</p>
<div class="org-src-container">
<pre class="src src-c" id="org2d4105a"><span style="color: #a020f0;">typedef</span> <span style="color: #228b22;">int32_t</span> <span style="color: #228b22;">qmckl_exit_code</span>;
</pre>
</div>
<p>
The exit code returns the completion status of the function to the
calling program. When a function call completed successfully,
<code>QMCKL_SUCCESS</code> is returned. If one of the functions of
the library fails to complete the requested task, an appropriate
error code is returned to the program.
</p>
<p>
Here is the complete list of exit codes.
</p>
<table id="org0fa1cbe" border="2" cellspacing="0" cellpadding="6" rules="groups" frame="hsides">
<colgroup>
<col class="org-left" />
<col class="org-right" />
<col class="org-left" />
</colgroup>
<thead>
<tr>
<th scope="col" class="org-left">Macro</th>
<th scope="col" class="org-right">Code</th>
<th scope="col" class="org-left">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="org-left"><code>QMCKL_SUCCESS</code></td>
<td class="org-right">0</td>
<td class="org-left">'Success'</td>
</tr>
<tr>
<td class="org-left"><code>QMCKL_INVALID_ARG_1</code></td>
<td class="org-right">1</td>
<td class="org-left">'Invalid argument 1'</td>
</tr>
<tr>
<td class="org-left"><code>QMCKL_INVALID_ARG_2</code></td>
<td class="org-right">2</td>
<td class="org-left">'Invalid argument 2'</td>
</tr>
<tr>
<td class="org-left"><code>QMCKL_INVALID_ARG_3</code></td>
<td class="org-right">3</td>
<td class="org-left">'Invalid argument 3'</td>
</tr>
<tr>
<td class="org-left"><code>QMCKL_INVALID_ARG_4</code></td>
<td class="org-right">4</td>
<td class="org-left">'Invalid argument 4'</td>
</tr>
<tr>
<td class="org-left"><code>QMCKL_INVALID_ARG_5</code></td>
<td class="org-right">5</td>
<td class="org-left">'Invalid argument 5'</td>
</tr>
<tr>
<td class="org-left"><code>QMCKL_INVALID_ARG_6</code></td>
<td class="org-right">6</td>
<td class="org-left">'Invalid argument 6'</td>
</tr>
<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-orgcdf8fd0" class="outline-2">
<h2 id="orgcdf8fd0"><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-org3597000" class="outline-2">
<h2 id="org3597000"><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-orgadd0e83" class="outline-2">
<h2 id="orgadd0e83"><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-org1dfc616" class="outline-2">
<h2 id="org1dfc616"><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-org86c8c7d" class="outline-2">
<h2 id="org86c8c7d"><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 &lt; 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 &gt;= 0"</span>);
}
</pre>
</div>
</div>
</div>
<div id="outline-container-org9e9f757" class="outline-2">
<h2 id="org9e9f757"><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-org0190942" class="outline-3">
<h3 id="org0190942"><span class="section-number-3">6.1</span> Fortran inteface</h3>
</div>
</div>
<div id="outline-container-orgd90433d" class="outline-2">
<h2 id="orgd90433d"><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-org1a69c93" class="outline-3">
<h3 id="org1a69c93"><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: 2024-03-29 Fri 08:29</p>
<p class="validation"><a href="http://validator.w3.org/check?uri=referer">Validate</a></p>
</div>
</body>
</html>