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<p>Miscllaneous utility functions and macros.
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Macros</h2></td></tr>
<tr class="memitem:a3dde282dc23d0eaa3c4840df8dc262d4"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="json__util_8h.html#a3dde282dc23d0eaa3c4840df8dc262d4">json_min</a>(a, b)   ((a) < (b) ? (a) : (b))</td></tr>
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<tr class="memitem:a57d63d199d4b9ea40359253618951300"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="json__util_8h.html#a57d63d199d4b9ea40359253618951300">json_max</a>(a, b)   ((a) > (b) ? (a) : (b))</td></tr>
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Functions</h2></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Miscllaneous utility functions and macros. </p>
</div><h2 class="groupheader">Macro Definition Documentation</h2>
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<td class="memname">#define JSON_FILE_BUF_SIZE   4096</td>
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<td class="memname">#define json_max</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">a, </td>
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<td class="paramtype"> </td>
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<td>)</td>
<td></td><td>   ((a) > (b) ? (a) : (b))</td>
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<td class="memname">#define json_min</td>
<td>(</td>
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<h2 class="groupheader">Function Documentation</h2>
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<td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> struct <a class="el" href="json__types_8h.html#af27907ced0f5a43409ad96430fe0f914">json_object</a>* json_object_from_fd </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>fd</em></td><td>)</td>
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<p>Create a JSON object from an already opened file descriptor, using the default maximum object depth. (JSON_TOKENER_DEFAULT_DEPTH)</p>
<p>See <a class="el" href="json__util_8h.html#a88c5c7ce735d95f6c3c81c73475e14aa">json_object_from_fd_ex()</a> for details. </p>
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<td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> struct <a class="el" href="json__types_8h.html#af27907ced0f5a43409ad96430fe0f914">json_object</a>* json_object_from_fd_ex </td>
<td>(</td>
<td class="paramtype">int </td>
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<p>Create a JSON object from already opened file descriptor.</p>
<p>This function can be helpful, when you opened the file already, e.g. when you have a temp file. Note, that the fd must be readable at the actual position, i.e. use lseek(fd, 0, SEEK_SET) before.</p>
<p>The depth argument specifies the maximum object depth to pass to <a class="el" href="json__tokener_8h.html#a6a1583ddd434e13515d6232de813462e">json_tokener_new_ex()</a>. When depth == -1, JSON_TOKENER_DEFAULT_DEPTH is used instead.</p>
<p>Returns NULL on failure. See <a class="el" href="json__util_8h.html#a9fe4dbb5fe32850cdc22a97454e4500b">json_util_get_last_err()</a> for details. </p>
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<td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> struct <a class="el" href="json__types_8h.html#af27907ced0f5a43409ad96430fe0f914">json_object</a>* json_object_from_file </td>
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<td class="paramname"><em>filename</em></td><td>)</td>
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<p>Read the full contents of the given file, then convert it to a json_object using <a class="el" href="json__tokener_8h.html#a236ef64d079822a4411d13eae7190c4d">json_tokener_parse()</a>.</p>
<p>Returns NULL on failure. See <a class="el" href="json__util_8h.html#a9fe4dbb5fe32850cdc22a97454e4500b">json_util_get_last_err()</a> for details. </p>
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<td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> int json_object_to_fd </td>
<td>(</td>
<td class="paramtype">int </td>
<td class="paramname"><em>fd</em>, </td>
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<td class="paramtype">int </td>
<td class="paramname"><em>flags</em> </td>
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<td>)</td>
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<p>Convert the json_object to a string and write it to the file descriptor. Handles partial writes and will keep writing until done, or an error occurs.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">fd</td><td>an open, writable file descriptor to write to </td></tr>
<tr><td class="paramname">obj</td><td>the object to serializer and write </td></tr>
<tr><td class="paramname">flags</td><td>flags to pass to <a class="el" href="json__object_8h.html#a9db613127bd4ef7db42307e43a85fc1b">json_object_to_json_string_ext()</a> </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>-1 if something fails. See <a class="el" href="json__util_8h.html#a9fe4dbb5fe32850cdc22a97454e4500b">json_util_get_last_err()</a> for details. </dd></dl>
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<td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> int json_object_to_file </td>
<td>(</td>
<td class="paramtype">const char * </td>
<td class="paramname"><em>filename</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">struct <a class="el" href="json__types_8h.html#af27907ced0f5a43409ad96430fe0f914">json_object</a> * </td>
<td class="paramname"><em>obj</em> </td>
</tr>
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<td></td>
<td>)</td>
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<p>Equivalent to: json_object_to_file_ext(filename, obj, JSON_C_TO_STRING_PLAIN);</p>
<p>Returns -1 if something fails. See <a class="el" href="json__util_8h.html#a9fe4dbb5fe32850cdc22a97454e4500b">json_util_get_last_err()</a> for details. </p>
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<td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> int json_object_to_file_ext </td>
<td>(</td>
<td class="paramtype">const char * </td>
<td class="paramname"><em>filename</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">struct <a class="el" href="json__types_8h.html#af27907ced0f5a43409ad96430fe0f914">json_object</a> * </td>
<td class="paramname"><em>obj</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>flags</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
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<p>Open and truncate the given file, creating it if necessary, then convert the json_object to a string and write it to the file.</p>
<p>Returns -1 if something fails. See <a class="el" href="json__util_8h.html#a9fe4dbb5fe32850cdc22a97454e4500b">json_util_get_last_err()</a> for details. </p>
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<td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> int json_parse_double </td>
<td>(</td>
<td class="paramtype">const char * </td>
<td class="paramname"><em>buf</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">double * </td>
<td class="paramname"><em>retval</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
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<dl class="deprecated"><dt><b><a class="el" href="deprecated.html#_deprecated000008">Deprecated:</a></b></dt><dd></dd></dl>
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<td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> int json_parse_int64 </td>
<td>(</td>
<td class="paramtype">const char * </td>
<td class="paramname"><em>buf</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int64_t * </td>
<td class="paramname"><em>retval</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
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<td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> int json_parse_uint64 </td>
<td>(</td>
<td class="paramtype">const char * </td>
<td class="paramname"><em>buf</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint64_t * </td>
<td class="paramname"><em>retval</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
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<td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> const char* json_type_to_name </td>
<td>(</td>
<td class="paramtype">enum <a class="el" href="json__types_8h.html#ac75c61993722a9b8aaa44704072ec06c">json_type</a> </td>
<td class="paramname"><em>o_type</em></td><td>)</td>
<td></td>
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<p>Return a string describing the type of the object. e.g. "int", or "object", etc... </p>
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<td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> const char* json_util_get_last_err </td>
<td>(</td>
<td class="paramtype">void </td>
<td class="paramname"></td><td>)</td>
<td></td>
</tr>
</table>
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<p>Return the last error from various json-c functions, including: json_object_to_file{,<em>ext}, <a class="el" href="json__util_8h.html#afd492c120e359d2d75b67da96b580661">json_object_to_fd()</a> or json_object_from</em>{file,fd}, or NULL if there is none. </p>
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