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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Validate: Gwyddion Application Library Reference Manual</title>
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<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="5"><tr valign="middle">
<td width="100%" align="left" class="shortcuts">
<a href="#" class="shortcut">Top</a><span id="nav_description">  <span class="dim">|</span> 
                  <a href="#libgwyapp-Validate.description" class="shortcut">Description</a></span>
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</tr></table>
<div class="refentry">
<a name="libgwyapp-Validate"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="libgwyapp-Validate.top_of_page"></a>Validate</span></h2>
<p>Validate — Check data sanity and consistency</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="libgwyapp-Validate.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<a href="http://developer.gnome.org/doc/API/2.0/gtk/glibglib-Singly-Linked-Lists.html#GSList"><span class="returnvalue">GSList</span></a> *
</td>
<td class="function_name">
<a class="link" href="libgwyapp-Validate.html#gwy-data-validate" title="gwy_data_validate ()">gwy_data_validate</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a href="http://developer.gnome.org/doc/API/2.0/gtk/glibglib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="libgwyapp-Validate.html#gwy-data-error-desrcibe" title="gwy_data_error_desrcibe ()">gwy_data_error_desrcibe</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="libgwyapp-Validate.html#gwy-data-validation-failure-list-free" title="gwy_data_validation_failure_list_free ()">gwy_data_validation_failure_list_free</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="libgwyapp-Validate.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="libgwyapp-Validate.html#GwyDataError" title="enum GwyDataError">GwyDataError</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="libgwyapp-Validate.html#GwyDataValidateFlags" title="enum GwyDataValidateFlags">GwyDataValidateFlags</a></td>
</tr>
<tr>
<td class="datatype_keyword"> </td>
<td class="function_name"><a class="link" href="libgwyapp-Validate.html#GwyDataValidationFailure" title="GwyDataValidationFailure">GwyDataValidationFailure</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="libgwyapp-Validate.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include &lt;app/gwyapp.h&gt;
</pre>
</div>
<div class="refsect1">
<a name="libgwyapp-Validate.description"></a><h2>Description</h2>
<p>A <a href="../GwyContainer.html#GwyContainer-struct"><span class="type">GwyContainer</span></a> can be used to represent all sorts of data.  However,
Gwyddion, the application, follows certain conventions in data organization.
Function <a class="link" href="libgwyapp-Validate.html#gwy-data-validate" title="gwy_data_validate ()"><code class="function">gwy_data_validate()</code></a> checks whether the data actually follows them.
This includes but is not limited to representability of keys in ASCII,
conformance to the key naming convention, types of objects and other items
corresponding to expectation, string values being valid UTF-8 and no stray
secondary data.</p>
</div>
<div class="refsect1">
<a name="libgwyapp-Validate.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="gwy-data-validate"></a><h3>gwy_data_validate ()</h3>
<pre class="programlisting"><a href="http://developer.gnome.org/doc/API/2.0/gtk/glibglib-Singly-Linked-Lists.html#GSList"><span class="returnvalue">GSList</span></a> *
gwy_data_validate (<em class="parameter"><code><a href="../GwyContainer.html#GwyContainer-struct"><span class="type">GwyContainer</span></a> *data</code></em>,
                   <em class="parameter"><code><a class="link" href="libgwyapp-Validate.html#GwyDataValidateFlags" title="enum GwyDataValidateFlags"><span class="type">GwyDataValidateFlags</span></a> flags</code></em>);</pre>
<p>Checks the contents of a data file.</p>
<p>If <a class="link" href="libgwyapp-Validate.html#GWY-DATA-VALIDATE-CORRECT:CAPS"><code class="literal">GWY_DATA_VALIDATE_CORRECT</code></a> is given in <em class="parameter"><code>flags</code></em>
, correctable problems are
corrected.  At present correctable problems are those that can be fixed
by removal of the offending data.</p>
<div class="refsect3">
<a name="gwy-data-validate.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>data</p></td>
<td class="parameter_description"><p>Data container.  It should not be managed by the data browser (yet)
if flags contain <a class="link" href="libgwyapp-Validate.html#GWY-DATA-VALIDATE-CORRECT:CAPS"><code class="literal">GWY_DATA_VALIDATE_CORRECT</code></a> (because things can
in principle break during the correction) or
<a class="link" href="libgwyapp-Validate.html#GWY-DATA-VALIDATE-REF-COUNT:CAPS"><code class="literal">GWY_DATA_VALIDATE_REF_COUNT</code></a> (because the application took some
references).</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>flags</p></td>
<td class="parameter_description"><p>Validation flags.  Some influence what is checked, some determine
what to do when problems are found.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>returns</p></td>
<td class="parameter_description"><p>List of errors found, free
with <a class="link" href="libgwyapp-Validate.html#gwy-data-validation-failure-list-free" title="gwy_data_validation_failure_list_free ()"><code class="function">gwy_data_validation_failure_list_free()</code></a>.
The list is independent on whether <a class="link" href="libgwyapp-Validate.html#GWY-DATA-VALIDATE-CORRECT:CAPS"><code class="literal">GWY_DATA_VALIDATE_CORRECT</code></a> is
given in flags, even though the offending items may be no longer
exist in the container after correction.  If
<a class="link" href="libgwyapp-Validate.html#GWY-DATA-VALIDATE-NO-REPORT:CAPS"><code class="literal">GWY_DATA_VALIDATE_NO_REPORT</code></a> is present in flags, <a href="http://developer.gnome.org/doc/API/2.0/gtk/glibglib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> is always
returned.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-2-9.html#api-index-2.9">2.9</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-error-desrcibe"></a><h3>gwy_data_error_desrcibe ()</h3>
<pre class="programlisting">const <a href="http://developer.gnome.org/doc/API/2.0/gtk/glibglib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
gwy_data_error_desrcibe (<em class="parameter"><code><a class="link" href="libgwyapp-Validate.html#GwyDataError" title="enum GwyDataError"><span class="type">GwyDataError</span></a> error</code></em>);</pre>
<p>Describes a data validation error type.</p>
<div class="refsect3">
<a name="gwy-data-error-desrcibe.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>error</p></td>
<td class="parameter_description"><p>Data validation error type.</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>returns</p></td>
<td class="parameter_description"><p>Error description as an untranslated string owned by the
library.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-2-9.html#api-index-2.9">2.9</a></p>
</div>
<hr>
<div class="refsect2">
<a name="gwy-data-validation-failure-list-free"></a><h3>gwy_data_validation_failure_list_free ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gwy_data_validation_failure_list_free (<em class="parameter"><code><a href="http://developer.gnome.org/doc/API/2.0/gtk/glibglib-Singly-Linked-Lists.html#GSList"><span class="type">GSList</span></a> *list</code></em>);</pre>
<p>Frees a data validation failure list.</p>
<div class="refsect3">
<a name="gwy-data-validation-failure-list-free.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>list</p></td>
<td class="parameter_description"><p>Failure list returned by <a class="link" href="libgwyapp-Validate.html#gwy-data-validate" title="gwy_data_validate ()"><code class="function">gwy_data_validate()</code></a>.</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-2-9.html#api-index-2.9">2.9</a></p>
</div>
</div>
<div class="refsect1">
<a name="libgwyapp-Validate.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GwyDataError"></a><h3>enum GwyDataError</h3>
<p>Type of data validation errors.</p>
<div class="refsect3">
<a name="GwyDataError.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="GWY-DATA-ERROR-KEY-FORMAT:CAPS"></a>GWY_DATA_ERROR_KEY_FORMAT</p></td>
<td class="enum_member_description">
<p>Key format is invalid (e.g. does not start
                            with <a href="../GwyContainer.html#GWY-CONTAINER-PATHSEP:CAPS"><code class="literal">GWY_CONTAINER_PATHSEP</code></a>).</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GWY-DATA-ERROR-KEY-CHARACTERS:CAPS"></a>GWY_DATA_ERROR_KEY_CHARACTERS</p></td>
<td class="enum_member_description">
<p>Key contains unprintable characters or
                                characters not representable in ASCII.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GWY-DATA-ERROR-KEY-UNKNOWN:CAPS"></a>GWY_DATA_ERROR_KEY_UNKNOWN</p></td>
<td class="enum_member_description">
<p>Key does not correspond to any data item known
                             to this version of Gwyddion.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GWY-DATA-ERROR-KEY-ID:CAPS"></a>GWY_DATA_ERROR_KEY_ID</p></td>
<td class="enum_member_description">
<p>Key corresponds to a data item with bogus id number.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GWY-DATA-ERROR-ITEM-TYPE:CAPS"></a>GWY_DATA_ERROR_ITEM_TYPE</p></td>
<td class="enum_member_description">
<p>Wrong item type (for instance an integer at key
                           <code class="literal">"/0/data"</code>).</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GWY-DATA-ERROR-NON-UTF8-STRING:CAPS"></a>GWY_DATA_ERROR_NON_UTF8_STRING</p></td>
<td class="enum_member_description">
<p>String value is not valid UTF-8.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GWY-DATA-ERROR-REF-COUNT:CAPS"></a>GWY_DATA_ERROR_REF_COUNT</p></td>
<td class="enum_member_description">
<p>Reference count is higher than 1.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GWY-DATA-ERROR-STRAY-SECONDARY-DATA:CAPS"></a>GWY_DATA_ERROR_STRAY_SECONDARY_DATA</p></td>
<td class="enum_member_description">
<p>Secondary data item (e.g. mask,
                                      selection or visibility) without a
                                      corresponding valid primary data item.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-2-9.html#api-index-2.9">2.9</a></p>
</div>
<hr>
<div class="refsect2">
<a name="GwyDataValidateFlags"></a><h3>enum GwyDataValidateFlags</h3>
<p>Flags controlling <a class="link" href="libgwyapp-Validate.html#gwy-data-validate" title="gwy_data_validate ()"><code class="function">gwy_data_validate()</code></a> behaviour.</p>
<p>Note passing <em class="parameter"><code>GWY_DATA_VALIDATE_NO_REPORT</code></em>
 is allowed only if
<em class="parameter"><code>GWY_DATA_VALIDATE_CORRECT</code></em>
 is present too.</p>
<div class="refsect3">
<a name="GwyDataValidateFlags.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="GWY-DATA-VALIDATE-UNKNOWN:CAPS"></a>GWY_DATA_VALIDATE_UNKNOWN</p></td>
<td class="enum_member_description">
<p>Report all unknown keys as
                            <a class="link" href="libgwyapp-Validate.html#GWY-DATA-ERROR-KEY-UNKNOWN:CAPS"><code class="literal">GWY_DATA_ERROR_KEY_UNKNOWN</code></a> errors.  Note while
                            a data item unknown to the current version of
                            Gwyddion can come from a newer version therefore
                            it can be in certain sense valid.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GWY-DATA-VALIDATE-REF-COUNT:CAPS"></a>GWY_DATA_VALIDATE_REF_COUNT</p></td>
<td class="enum_member_description">
<p>Report all object items with reference count
                              higher than 1 as <a class="link" href="libgwyapp-Validate.html#GWY-DATA-ERROR-REF-COUNT:CAPS"><code class="literal">GWY_DATA_ERROR_REF_COUNT</code></a>
                              errors.  Obviously this makes sense only with
                              `fresh' data containers.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GWY-DATA-VALIDATE-ALL:CAPS"></a>GWY_DATA_VALIDATE_ALL</p></td>
<td class="enum_member_description">
<p>All above flags combined.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GWY-DATA-VALIDATE-CORRECT:CAPS"></a>GWY_DATA_VALIDATE_CORRECT</p></td>
<td class="enum_member_description">
<p>Attempt to correct problems.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="GWY-DATA-VALIDATE-NO-REPORT:CAPS"></a>GWY_DATA_VALIDATE_NO_REPORT</p></td>
<td class="enum_member_description">
<p>Do not report problems.</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-2-9.html#api-index-2.9">2.9</a></p>
</div>
<hr>
<div class="refsect2">
<a name="GwyDataValidationFailure"></a><h3>GwyDataValidationFailure</h3>
<pre class="programlisting">typedef struct {
    GwyDataError error;
    GQuark key;
    gchar *details;
} GwyDataValidationFailure;
</pre>
<p>Information about one data validate error.</p>
<p>Note the structure may contain more private fields.</p>
<div class="refsect3">
<a name="GwyDataValidationFailure.members"></a><h4>Members</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="300px" class="struct_members_name">
<col class="struct_members_description">
<col width="200px" class="struct_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="struct_member_name"><p><a class="link" href="libgwyapp-Validate.html#GwyDataError" title="enum GwyDataError"><span class="type">GwyDataError</span></a> <em class="structfield"><code><a name="GwyDataValidationFailure.error"></a>error</code></em>;</p></td>
<td class="struct_member_description"><p>Error type.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><a href="http://developer.gnome.org/doc/API/2.0/gtk/glibglib-Quarks.html#GQuark"><span class="type">GQuark</span></a> <em class="structfield"><code><a name="GwyDataValidationFailure.key"></a>key</code></em>;</p></td>
<td class="struct_member_description"><p>Key of the problematic data item.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><a href="http://developer.gnome.org/doc/API/2.0/gtk/glibglib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *<em class="structfield"><code><a name="GwyDataValidationFailure.details"></a>details</code></em>;</p></td>
<td class="struct_member_description"><p>Error details, may be <a href="http://developer.gnome.org/doc/API/2.0/gtk/glibglib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> for some types of <em class="parameter"><code>error</code></em>
.  This is
a dynamically allocated string owned by the caller, however, he
normally frees the complete errors lists with
<a class="link" href="libgwyapp-Validate.html#gwy-data-validation-failure-list-free" title="gwy_data_validation_failure_list_free ()"><code class="function">gwy_data_validation_failure_list_free()</code></a> which frees these fields
too.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="api-index-2-9.html#api-index-2.9">2.9</a></p>
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