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   &#160;<span id="projectnumber">0.17</span>
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<p>JSON Patch (RFC 6902) implementation for manipulating JSON objects.  
<a href="#details">More...</a></p>
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Data Structures</h2></td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structjson__patch__error.html">json_patch_error</a></td></tr>
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Functions</h2></td></tr>
<tr class="memitem:a134aaed1e732d029d34ce2d605f9ac8d"><td class="memItemLeft" align="right" valign="top"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="json__patch_8h.html#a134aaed1e732d029d34ce2d605f9ac8d">json_patch_apply</a> (struct <a class="el" href="json__types_8h.html#af27907ced0f5a43409ad96430fe0f914">json_object</a> *copy_from, struct <a class="el" href="json__types_8h.html#af27907ced0f5a43409ad96430fe0f914">json_object</a> *patch, struct <a class="el" href="json__types_8h.html#af27907ced0f5a43409ad96430fe0f914">json_object</a> **base, struct <a class="el" href="structjson__patch__error.html">json_patch_error</a> *patch_error)</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>JSON Patch (RFC 6902) implementation for manipulating JSON objects. </p>
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          <td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> int json_patch_apply </td>
          <td>(</td>
          <td class="paramtype">struct <a class="el" href="json__types_8h.html#af27907ced0f5a43409ad96430fe0f914">json_object</a> *&#160;</td>
          <td class="paramname"><em>copy_from</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">struct <a class="el" href="json__types_8h.html#af27907ced0f5a43409ad96430fe0f914">json_object</a> *&#160;</td>
          <td class="paramname"><em>patch</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">struct <a class="el" href="json__types_8h.html#af27907ced0f5a43409ad96430fe0f914">json_object</a> **&#160;</td>
          <td class="paramname"><em>base</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">struct <a class="el" href="structjson__patch__error.html">json_patch_error</a> *&#160;</td>
          <td class="paramname"><em>patch_error</em>&#160;</td>
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          <td>)</td>
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<p>Apply the JSON patch to the base object. The patch object must be formatted as per RFC 6902, i.e. a json_type_array containing patch operations. If the patch is not correctly formatted, an error will be returned.</p>
<p>The json_object at *base will be modified in place. Exactly one of *base or copy_from must be non-NULL. If *base is NULL, a new copy of copy_from will allocated and populated using <a class="el" href="json__object_8h.html#aaac16505f13bc56accfad82604d8bcdc">json_object_deep_copy()</a>. In this case <a class="el" href="json__object_8h.html#afabf61f932cd64a4122ca8092452eed5">json_object_put()</a> <em>must</em> be used to free *base even if the overall patching operation fails.</p>
<p>If anything fails during patching a negative value will be returned, and patch_error (if non-NULL) will be populated with error details.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">base</td><td>a pointer to the JSON object which to patch </td></tr>
    <tr><td class="paramname">patch</td><td>the JSON object that describes the patch to be applied </td></tr>
    <tr><td class="paramname">copy_from</td><td>a JSON object to copy to *base </td></tr>
    <tr><td class="paramname">patch_error</td><td>optional, details about errors</td></tr>
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</dl>
<dl class="section return"><dt>Returns</dt><dd>negative if an error (or not found), or 0 if patch completely applied </dd></dl>

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