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  46. <a href="#define-members">Macros</a> &#124;
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  49. <div class="title">json_util.h File Reference</div> </div>
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  51. <div class="contents">
  52. <p>Miscllaneous utility functions and macros.
  53. <a href="#details">More...</a></p>
  54. <table class="memberdecls">
  55. <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="define-members"></a>
  56. Macros</h2></td></tr>
  57. <tr class="memitem:a3dde282dc23d0eaa3c4840df8dc262d4"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="json__util_8h.html#a3dde282dc23d0eaa3c4840df8dc262d4">json_min</a>(a, b)&#160;&#160;&#160;((a) &lt; (b) ? (a) : (b))</td></tr>
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  59. <tr class="memitem:a57d63d199d4b9ea40359253618951300"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="json__util_8h.html#a57d63d199d4b9ea40359253618951300">json_max</a>(a, b)&#160;&#160;&#160;((a) &gt; (b) ? (a) : (b))</td></tr>
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  61. <tr class="memitem:a084b6afc8f7fbef88976aabe4aca7efd"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="json__util_8h.html#a084b6afc8f7fbef88976aabe4aca7efd">JSON_FILE_BUF_SIZE</a>&#160;&#160;&#160;4096</td></tr>
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  63. </table><table class="memberdecls">
  64. <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
  65. Functions</h2></td></tr>
  66. <tr class="memitem:a03119ec0a71af4eee95318e9b2aaf05b"><td class="memItemLeft" align="right" valign="top"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> struct <a class="el" href="json__types_8h.html#af27907ced0f5a43409ad96430fe0f914">json_object</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="json__util_8h.html#a03119ec0a71af4eee95318e9b2aaf05b">json_object_from_file</a> (const char *filename)</td></tr>
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  89. <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
  90. <div class="textblock"><p>Miscllaneous utility functions and macros. </p>
  91. </div><h2 class="groupheader">Macro Definition Documentation</h2>
  92. <a class="anchor" id="a084b6afc8f7fbef88976aabe4aca7efd"></a>
  93. <div class="memitem">
  94. <div class="memproto">
  95. <table class="memname">
  96. <tr>
  97. <td class="memname">#define JSON_FILE_BUF_SIZE&#160;&#160;&#160;4096</td>
  98. </tr>
  99. </table>
  100. </div><div class="memdoc">
  101. </div>
  102. </div>
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  107. <tr>
  108. <td class="memname">#define json_max</td>
  109. <td>(</td>
  110. <td class="paramtype">&#160;</td>
  111. <td class="paramname">a, </td>
  112. </tr>
  113. <tr>
  114. <td class="paramkey"></td>
  115. <td></td>
  116. <td class="paramtype">&#160;</td>
  117. <td class="paramname">b&#160;</td>
  118. </tr>
  119. <tr>
  120. <td></td>
  121. <td>)</td>
  122. <td></td><td>&#160;&#160;&#160;((a) &gt; (b) ? (a) : (b))</td>
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  125. </div><div class="memdoc">
  126. </div>
  127. </div>
  128. <a class="anchor" id="a3dde282dc23d0eaa3c4840df8dc262d4"></a>
  129. <div class="memitem">
  130. <div class="memproto">
  131. <table class="memname">
  132. <tr>
  133. <td class="memname">#define json_min</td>
  134. <td>(</td>
  135. <td class="paramtype">&#160;</td>
  136. <td class="paramname">a, </td>
  137. </tr>
  138. <tr>
  139. <td class="paramkey"></td>
  140. <td></td>
  141. <td class="paramtype">&#160;</td>
  142. <td class="paramname">b&#160;</td>
  143. </tr>
  144. <tr>
  145. <td></td>
  146. <td>)</td>
  147. <td></td><td>&#160;&#160;&#160;((a) &lt; (b) ? (a) : (b))</td>
  148. </tr>
  149. </table>
  150. </div><div class="memdoc">
  151. </div>
  152. </div>
  153. <h2 class="groupheader">Function Documentation</h2>
  154. <a class="anchor" id="a5b72bf6f3ac8fb03da38d2e2d1e18d1b"></a>
  155. <div class="memitem">
  156. <div class="memproto">
  157. <table class="mlabels">
  158. <tr>
  159. <td class="mlabels-left">
  160. <table class="memname">
  161. <tr>
  162. <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>
  163. <td>(</td>
  164. <td class="paramtype">int&#160;</td>
  165. <td class="paramname"><em>fd</em></td><td>)</td>
  166. <td></td>
  167. </tr>
  168. </table>
  169. </td>
  170. <td class="mlabels-right">
  171. <span class="mlabels"><span class="mlabel">read</span></span> </td>
  172. </tr>
  173. </table>
  174. </div><div class="memdoc">
  175. <p>Create a JSON object from an already opened file descriptor, using the default maximum object depth. (JSON_TOKENER_DEFAULT_DEPTH)</p>
  176. <p>See <a class="el" href="json__util_8h.html#a88c5c7ce735d95f6c3c81c73475e14aa">json_object_from_fd_ex()</a> for details. </p>
  177. </div>
  178. </div>
  179. <a class="anchor" id="a88c5c7ce735d95f6c3c81c73475e14aa"></a>
  180. <div class="memitem">
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  183. <tr>
  184. <td class="mlabels-left">
  185. <table class="memname">
  186. <tr>
  187. <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>
  188. <td>(</td>
  189. <td class="paramtype">int&#160;</td>
  190. <td class="paramname"><em>fd</em>, </td>
  191. </tr>
  192. <tr>
  193. <td class="paramkey"></td>
  194. <td></td>
  195. <td class="paramtype">int&#160;</td>
  196. <td class="paramname"><em>depth</em>&#160;</td>
  197. </tr>
  198. <tr>
  199. <td></td>
  200. <td>)</td>
  201. <td></td><td></td>
  202. </tr>
  203. </table>
  204. </td>
  205. <td class="mlabels-right">
  206. <span class="mlabels"><span class="mlabel">read</span></span> </td>
  207. </tr>
  208. </table>
  209. </div><div class="memdoc">
  210. <p>Create a JSON object from already opened file descriptor.</p>
  211. <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>
  212. <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>
  213. <p>Returns NULL on failure. See <a class="el" href="json__util_8h.html#a9fe4dbb5fe32850cdc22a97454e4500b">json_util_get_last_err()</a> for details. </p>
  214. </div>
  215. </div>
  216. <a class="anchor" id="a03119ec0a71af4eee95318e9b2aaf05b"></a>
  217. <div class="memitem">
  218. <div class="memproto">
  219. <table class="mlabels">
  220. <tr>
  221. <td class="mlabels-left">
  222. <table class="memname">
  223. <tr>
  224. <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>
  225. <td>(</td>
  226. <td class="paramtype">const char *&#160;</td>
  227. <td class="paramname"><em>filename</em></td><td>)</td>
  228. <td></td>
  229. </tr>
  230. </table>
  231. </td>
  232. <td class="mlabels-right">
  233. <span class="mlabels"><span class="mlabel">read</span></span> </td>
  234. </tr>
  235. </table>
  236. </div><div class="memdoc">
  237. <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>
  238. <p>Returns NULL on failure. See <a class="el" href="json__util_8h.html#a9fe4dbb5fe32850cdc22a97454e4500b">json_util_get_last_err()</a> for details. </p>
  239. </div>
  240. </div>
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  242. <div class="memitem">
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  245. <tr>
  246. <td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> int json_object_to_fd </td>
  247. <td>(</td>
  248. <td class="paramtype">int&#160;</td>
  249. <td class="paramname"><em>fd</em>, </td>
  250. </tr>
  251. <tr>
  252. <td class="paramkey"></td>
  253. <td></td>
  254. <td class="paramtype">struct <a class="el" href="json__types_8h.html#af27907ced0f5a43409ad96430fe0f914">json_object</a> *&#160;</td>
  255. <td class="paramname"><em>obj</em>, </td>
  256. </tr>
  257. <tr>
  258. <td class="paramkey"></td>
  259. <td></td>
  260. <td class="paramtype">int&#160;</td>
  261. <td class="paramname"><em>flags</em>&#160;</td>
  262. </tr>
  263. <tr>
  264. <td></td>
  265. <td>)</td>
  266. <td></td><td></td>
  267. </tr>
  268. </table>
  269. </div><div class="memdoc">
  270. <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>
  271. <dl class="params"><dt>Parameters</dt><dd>
  272. <table class="params">
  273. <tr><td class="paramname">fd</td><td>an open, writable file descriptor to write to </td></tr>
  274. <tr><td class="paramname">obj</td><td>the object to serializer and write </td></tr>
  275. <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>
  276. </table>
  277. </dd>
  278. </dl>
  279. <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>
  280. </div>
  281. </div>
  282. <a class="anchor" id="a486fc95fafe7cb91c58c7f6487036bc5"></a>
  283. <div class="memitem">
  284. <div class="memproto">
  285. <table class="memname">
  286. <tr>
  287. <td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> int json_object_to_file </td>
  288. <td>(</td>
  289. <td class="paramtype">const char *&#160;</td>
  290. <td class="paramname"><em>filename</em>, </td>
  291. </tr>
  292. <tr>
  293. <td class="paramkey"></td>
  294. <td></td>
  295. <td class="paramtype">struct <a class="el" href="json__types_8h.html#af27907ced0f5a43409ad96430fe0f914">json_object</a> *&#160;</td>
  296. <td class="paramname"><em>obj</em>&#160;</td>
  297. </tr>
  298. <tr>
  299. <td></td>
  300. <td>)</td>
  301. <td></td><td></td>
  302. </tr>
  303. </table>
  304. </div><div class="memdoc">
  305. <p>Equivalent to: json_object_to_file_ext(filename, obj, JSON_C_TO_STRING_PLAIN);</p>
  306. <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>
  307. </div>
  308. </div>
  309. <a class="anchor" id="a68a7385c555cf21797e361d1d4de3441"></a>
  310. <div class="memitem">
  311. <div class="memproto">
  312. <table class="memname">
  313. <tr>
  314. <td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> int json_object_to_file_ext </td>
  315. <td>(</td>
  316. <td class="paramtype">const char *&#160;</td>
  317. <td class="paramname"><em>filename</em>, </td>
  318. </tr>
  319. <tr>
  320. <td class="paramkey"></td>
  321. <td></td>
  322. <td class="paramtype">struct <a class="el" href="json__types_8h.html#af27907ced0f5a43409ad96430fe0f914">json_object</a> *&#160;</td>
  323. <td class="paramname"><em>obj</em>, </td>
  324. </tr>
  325. <tr>
  326. <td class="paramkey"></td>
  327. <td></td>
  328. <td class="paramtype">int&#160;</td>
  329. <td class="paramname"><em>flags</em>&#160;</td>
  330. </tr>
  331. <tr>
  332. <td></td>
  333. <td>)</td>
  334. <td></td><td></td>
  335. </tr>
  336. </table>
  337. </div><div class="memdoc">
  338. <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>
  339. <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>
  340. </div>
  341. </div>
  342. <a class="anchor" id="a3f0f0b8f29a41b47d62e6c867707be50"></a>
  343. <div class="memitem">
  344. <div class="memproto">
  345. <table class="memname">
  346. <tr>
  347. <td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> int json_parse_double </td>
  348. <td>(</td>
  349. <td class="paramtype">const char *&#160;</td>
  350. <td class="paramname"><em>buf</em>, </td>
  351. </tr>
  352. <tr>
  353. <td class="paramkey"></td>
  354. <td></td>
  355. <td class="paramtype">double *&#160;</td>
  356. <td class="paramname"><em>retval</em>&#160;</td>
  357. </tr>
  358. <tr>
  359. <td></td>
  360. <td>)</td>
  361. <td></td><td></td>
  362. </tr>
  363. </table>
  364. </div><div class="memdoc">
  365. <dl class="deprecated"><dt><b><a class="el" href="deprecated.html#_deprecated000008">Deprecated:</a></b></dt><dd></dd></dl>
  366. </div>
  367. </div>
  368. <a class="anchor" id="a9d9a63936cdae6639b9cdd87fdd13506"></a>
  369. <div class="memitem">
  370. <div class="memproto">
  371. <table class="memname">
  372. <tr>
  373. <td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> int json_parse_int64 </td>
  374. <td>(</td>
  375. <td class="paramtype">const char *&#160;</td>
  376. <td class="paramname"><em>buf</em>, </td>
  377. </tr>
  378. <tr>
  379. <td class="paramkey"></td>
  380. <td></td>
  381. <td class="paramtype">int64_t *&#160;</td>
  382. <td class="paramname"><em>retval</em>&#160;</td>
  383. </tr>
  384. <tr>
  385. <td></td>
  386. <td>)</td>
  387. <td></td><td></td>
  388. </tr>
  389. </table>
  390. </div><div class="memdoc">
  391. </div>
  392. </div>
  393. <a class="anchor" id="a94c2340c1344d57f7aa067f2dd0407f9"></a>
  394. <div class="memitem">
  395. <div class="memproto">
  396. <table class="memname">
  397. <tr>
  398. <td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> int json_parse_uint64 </td>
  399. <td>(</td>
  400. <td class="paramtype">const char *&#160;</td>
  401. <td class="paramname"><em>buf</em>, </td>
  402. </tr>
  403. <tr>
  404. <td class="paramkey"></td>
  405. <td></td>
  406. <td class="paramtype">uint64_t *&#160;</td>
  407. <td class="paramname"><em>retval</em>&#160;</td>
  408. </tr>
  409. <tr>
  410. <td></td>
  411. <td>)</td>
  412. <td></td><td></td>
  413. </tr>
  414. </table>
  415. </div><div class="memdoc">
  416. </div>
  417. </div>
  418. <a class="anchor" id="a762aaf3df0a9c7b6919cdc1035348012"></a>
  419. <div class="memitem">
  420. <div class="memproto">
  421. <table class="memname">
  422. <tr>
  423. <td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> const char* json_type_to_name </td>
  424. <td>(</td>
  425. <td class="paramtype">enum <a class="el" href="json__types_8h.html#ac75c61993722a9b8aaa44704072ec06c">json_type</a>&#160;</td>
  426. <td class="paramname"><em>o_type</em></td><td>)</td>
  427. <td></td>
  428. </tr>
  429. </table>
  430. </div><div class="memdoc">
  431. <p>Return a string describing the type of the object. e.g. "int", or "object", etc... </p>
  432. </div>
  433. </div>
  434. <a class="anchor" id="a9fe4dbb5fe32850cdc22a97454e4500b"></a>
  435. <div class="memitem">
  436. <div class="memproto">
  437. <table class="memname">
  438. <tr>
  439. <td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> const char* json_util_get_last_err </td>
  440. <td>(</td>
  441. <td class="paramtype">void&#160;</td>
  442. <td class="paramname"></td><td>)</td>
  443. <td></td>
  444. </tr>
  445. </table>
  446. </div><div class="memdoc">
  447. <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>
  448. </div>
  449. </div>
  450. </div><!-- contents -->
  451. <!-- start footer part -->
  452. <hr class="footer"/><address class="footer"><small>
  453. Generated on Thu Apr 14 2022 01:11:24 for json-c by &#160;<a href="http://www.doxygen.org/index.html">
  454. <img class="footer" src="doxygen.png" alt="doxygen"/>
  455. </a> 1.8.2
  456. </small></address>
  457. </body>
  458. </html>

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