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json-c/doc/html/json__pointer_8h.html
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<p>JSON Pointer (RFC 6901) implementation for retrieving objects from a json-c object tree.
<a href="#details">More...</a></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:aff88937e32b0ba6ffbd07cb4b1919053"><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__pointer_8h.html#aff88937e32b0ba6ffbd07cb4b1919053">json_pointer_get</a> (struct <a class="el" href="json__types_8h.html#af27907ced0f5a43409ad96430fe0f914">json_object</a> *obj, const char *path, struct <a class="el" href="json__types_8h.html#af27907ced0f5a43409ad96430fe0f914">json_object</a> **res)</td></tr>
<tr class="separator:aff88937e32b0ba6ffbd07cb4b1919053"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:af0ac03df64b215d05041e8007ed0233d"><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__pointer_8h.html#af0ac03df64b215d05041e8007ed0233d">json_pointer_getf</a> (struct <a class="el" href="json__types_8h.html#af27907ced0f5a43409ad96430fe0f914">json_object</a> *obj, struct <a class="el" href="json__types_8h.html#af27907ced0f5a43409ad96430fe0f914">json_object</a> **res, const char *path_fmt,...)</td></tr>
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<tr class="memitem:aef0e651f63ce5ce35648503705e2586b"><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__pointer_8h.html#aef0e651f63ce5ce35648503705e2586b">json_pointer_set</a> (struct <a class="el" href="json__types_8h.html#af27907ced0f5a43409ad96430fe0f914">json_object</a> **obj, const char *path, struct <a class="el" href="json__types_8h.html#af27907ced0f5a43409ad96430fe0f914">json_object</a> *value)</td></tr>
<tr class="separator:aef0e651f63ce5ce35648503705e2586b"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a66f1f98a2ce085c19f6750193b4c726d"><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__pointer_8h.html#a66f1f98a2ce085c19f6750193b4c726d">json_pointer_setf</a> (struct <a class="el" href="json__types_8h.html#af27907ced0f5a43409ad96430fe0f914">json_object</a> **obj, struct <a class="el" href="json__types_8h.html#af27907ced0f5a43409ad96430fe0f914">json_object</a> *value, const char *path_fmt,...)</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>JSON Pointer (RFC 6901) implementation for retrieving objects from a json-c object tree. </p>
</div><h2 class="groupheader">Function Documentation</h2>
<a class="anchor" id="aff88937e32b0ba6ffbd07cb4b1919053"></a>
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<td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> int json_pointer_get </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>obj</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">const char *&#160;</td>
<td class="paramname"><em>path</em>, </td>
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<td class="paramtype">struct <a class="el" href="json__types_8h.html#af27907ced0f5a43409ad96430fe0f914">json_object</a> **&#160;</td>
<td class="paramname"><em>res</em>&#160;</td>
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<p>Retrieves a JSON sub-object from inside another JSON object using the JSON pointer notation as defined in RFC 6901 <a href="https://tools.ietf.org/html/rfc6901">https://tools.ietf.org/html/rfc6901</a></p>
<p>The returned JSON sub-object is equivalent to parsing manually the 'obj' JSON tree ; i.e. it's not a new object that is created, but rather a pointer inside the JSON tree.</p>
<p>Internally, this is equivalent to doing a series of '<a class="el" href="json__object_8h.html#a1a097805abb53b4c8a60d573730a8939">json_object_object_get()</a>' and '<a class="el" href="json__object_8h.html#a676711a76545d4ec65cc75f100f5fd19">json_object_array_get_idx()</a>' along the given 'path'.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">obj</td><td>the json_object instance/tree from where to retrieve sub-objects </td></tr>
<tr><td class="paramname">path</td><td>a (RFC6901) string notation for the sub-object to retrieve </td></tr>
<tr><td class="paramname">res</td><td>a pointer that stores a reference to the json_object associated with the given path</td></tr>
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<dl class="section return"><dt>Returns</dt><dd>negative if an error (or not found), or 0 if succeeded </dd></dl>
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<a class="anchor" id="af0ac03df64b215d05041e8007ed0233d"></a>
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<td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> int json_pointer_getf </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>obj</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>res</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char *&#160;</td>
<td class="paramname"><em>path_fmt</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">&#160;</td>
<td class="paramname"><em>...</em>&#160;</td>
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<p>This is a variant of '<a class="el" href="json__pointer_8h.html#aff88937e32b0ba6ffbd07cb4b1919053">json_pointer_get()</a>' that supports printf() style arguments.</p>
<p>Variable arguments go after the 'path_fmt' parameter.</p>
<p>Example: json_pointer_getf(obj, res, "/foo/%d/%s", 0, "bar") This also means that you need to escape '' with '%' (just like in printf())</p>
<p>Please take into consideration all recommended 'printf()' format security aspects when using this function.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">obj</td><td>the json_object instance/tree to which to add a sub-object </td></tr>
<tr><td class="paramname">res</td><td>a pointer that stores a reference to the json_object associated with the given path </td></tr>
<tr><td class="paramname">path_fmt</td><td>a printf() style format for the path</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>negative if an error (or not found), or 0 if succeeded </dd></dl>
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</div>
<a class="anchor" id="aef0e651f63ce5ce35648503705e2586b"></a>
<div class="memitem">
<div class="memproto">
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<td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> int json_pointer_set </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>obj</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char *&#160;</td>
<td class="paramname"><em>path</em>, </td>
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<tr>
<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>value</em>&#160;</td>
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<td>)</td>
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<p>Sets JSON object 'value' in the 'obj' tree at the location specified by the 'path'. 'path' is JSON pointer notation as defined in RFC 6901 <a href="https://tools.ietf.org/html/rfc6901">https://tools.ietf.org/html/rfc6901</a></p>
<p>Note that 'obj' is a double pointer, mostly for the "" (empty string) case, where the entire JSON object would be replaced by 'value'. In the case of the "" path, the object at '*obj' will have it's refcount decremented with '<a class="el" href="json__object_8h.html#afabf61f932cd64a4122ca8092452eed5">json_object_put()</a>' and the 'value' object will be assigned to it.</p>
<p>For other cases (JSON sub-objects) ownership of 'value' will be transferred into '*obj' via '<a class="el" href="json__object_8h.html#a27bd808a022251059a43f1f6370441cd">json_object_object_add()</a>' &amp; '<a class="el" href="json__object_8h.html#a1ac0ccdbc13a25da7d8b2dc9e421dfad">json_object_array_put_idx()</a>', so the only time the refcount should be decremented for 'value' is when the return value of '<a class="el" href="json__pointer_8h.html#aef0e651f63ce5ce35648503705e2586b">json_pointer_set()</a>' is negative (meaning the 'value' object did not get set into '*obj').</p>
<p>That also implies that '<a class="el" href="json__pointer_8h.html#aef0e651f63ce5ce35648503705e2586b">json_pointer_set()</a>' does not do any refcount incrementing. (Just that single decrement that was mentioned above).</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">obj</td><td>the json_object instance/tree to which to add a sub-object </td></tr>
<tr><td class="paramname">path</td><td>a (RFC6901) string notation for the sub-object to set in the tree </td></tr>
<tr><td class="paramname">value</td><td>object to set at path</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>negative if an error (or not found), or 0 if succeeded </dd></dl>
</div>
</div>
<a class="anchor" id="a66f1f98a2ce085c19f6750193b4c726d"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> int json_pointer_setf </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>obj</em>, </td>
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<tr>
<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>value</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char *&#160;</td>
<td class="paramname"><em>path_fmt</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">&#160;</td>
<td class="paramname"><em>...</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>This is a variant of '<a class="el" href="json__pointer_8h.html#aef0e651f63ce5ce35648503705e2586b">json_pointer_set()</a>' that supports printf() style arguments.</p>
<p>Variable arguments go after the 'path_fmt' parameter.</p>
<p>Example: json_pointer_setf(obj, value, "/foo/%d/%s", 0, "bar") This also means that you need to escape '' with '%' (just like in printf())</p>
<p>Please take into consideration all recommended 'printf()' format security aspects when using this function.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">obj</td><td>the json_object instance/tree to which to add a sub-object </td></tr>
<tr><td class="paramname">value</td><td>object to set at path </td></tr>
<tr><td class="paramname">path_fmt</td><td>a printf() style format for the path</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>negative if an error (or not found), or 0 if succeeded </dd></dl>
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