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  43. <a href="#nested-classes">Data Structures</a> &#124;
  44. <a href="#define-members">Macros</a> &#124;
  45. <a href="#typedef-members">Typedefs</a> &#124;
  46. <a href="#func-members">Functions</a> </div>
  47. <div class="headertitle"><div class="title">printbuf.h File Reference</div></div>
  48. </div><!--header-->
  49. <div class="contents">
  50. <p>Internal string buffer handling. Unless you're writing a json_object_to_json_string_fn implementation for use with <a class="el" href="json__object_8h.html#a889345512a214b8f78f6a73561523c7c">json_object_set_serializer()</a> direct use of this is not recommended.
  51. <a href="#details">More...</a></p>
  52. <table class="memberdecls">
  53. <tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="nested-classes" name="nested-classes"></a>
  54. Data Structures</h2></td></tr>
  55. <tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structprintbuf.html">printbuf</a></td></tr>
  56. <tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
  57. </table><table class="memberdecls">
  58. <tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="define-members" name="define-members"></a>
  59. Macros</h2></td></tr>
  60. <tr class="memitem:a2a31d5c00f3a4712f2d5d62aee66344e"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a>&#160;&#160;&#160;extern</td></tr>
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  62. <tr class="memitem:a6f3a4dc87fab41c37e3eff42f40dc346"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="printbuf_8h.html#a6f3a4dc87fab41c37e3eff42f40dc346">printbuf_memappend_fast</a>(p, bufptr, bufsize)</td></tr>
  63. <tr class="separator:a6f3a4dc87fab41c37e3eff42f40dc346"><td class="memSeparator" colspan="2">&#160;</td></tr>
  64. <tr class="memitem:acdd84ad88987c0166b7ba0e3f1f8f1bb"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="printbuf_8h.html#acdd84ad88987c0166b7ba0e3f1f8f1bb">printbuf_length</a>(p)&#160;&#160;&#160;((p)-&gt;bpos)</td></tr>
  65. <tr class="separator:acdd84ad88987c0166b7ba0e3f1f8f1bb"><td class="memSeparator" colspan="2">&#160;</td></tr>
  66. <tr class="memitem:a2f30492682f5fbc59a8749b428e0e4ba"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="printbuf_8h.html#a2f30492682f5fbc59a8749b428e0e4ba">printbuf_strappend</a>(pb, str)&#160;&#160;&#160; <a class="el" href="printbuf_8h.html#a9c193d30e9ca4936ea28a6c9e8e4f6f0">printbuf_memappend</a>((pb), _printbuf_check_literal(str), sizeof(str) - 1)</td></tr>
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  69. <tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="typedef-members" name="typedef-members"></a>
  70. Typedefs</h2></td></tr>
  71. <tr class="memitem:ace274df280df67463ff417b1b3392395"><td class="memItemLeft" align="right" valign="top">typedef struct <a class="el" href="structprintbuf.html">printbuf</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="printbuf_8h.html#ace274df280df67463ff417b1b3392395">printbuf</a></td></tr>
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  73. </table><table class="memberdecls">
  74. <tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="func-members" name="func-members"></a>
  75. Functions</h2></td></tr>
  76. <tr class="memitem:a569dcc73d06828580ab6d9034bf78fea"><td class="memItemLeft" align="right" valign="top"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> struct <a class="el" href="structprintbuf.html">printbuf</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="printbuf_8h.html#a569dcc73d06828580ab6d9034bf78fea">printbuf_new</a> (void)</td></tr>
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  84. <tr class="memitem:a705c62167df13e65e04de9ae60f6e136"><td class="memItemLeft" align="right" valign="top"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="printbuf_8h.html#a705c62167df13e65e04de9ae60f6e136">printbuf_reset</a> (struct <a class="el" href="structprintbuf.html">printbuf</a> *p)</td></tr>
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  86. <tr class="memitem:a2b744266191ef5e3102fbf910e790a98"><td class="memItemLeft" align="right" valign="top"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="printbuf_8h.html#a2b744266191ef5e3102fbf910e790a98">printbuf_free</a> (struct <a class="el" href="structprintbuf.html">printbuf</a> *p)</td></tr>
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  88. </table>
  89. <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
  90. <div class="textblock"><p >Internal string buffer handling. Unless you're writing a json_object_to_json_string_fn implementation for use with <a class="el" href="json__object_8h.html#a889345512a214b8f78f6a73561523c7c">json_object_set_serializer()</a> direct use of this is not recommended. </p>
  91. </div><h2 class="groupheader">Macro Definition Documentation</h2>
  92. <a id="a2a31d5c00f3a4712f2d5d62aee66344e" name="a2a31d5c00f3a4712f2d5d62aee66344e"></a>
  93. <h2 class="memtitle"><span class="permalink"><a href="#a2a31d5c00f3a4712f2d5d62aee66344e">&#9670;&nbsp;</a></span>JSON_EXPORT</h2>
  94. <div class="memitem">
  95. <div class="memproto">
  96. <table class="memname">
  97. <tr>
  98. <td class="memname">#define JSON_EXPORT&#160;&#160;&#160;extern</td>
  99. </tr>
  100. </table>
  101. </div><div class="memdoc">
  102. </div>
  103. </div>
  104. <a id="acdd84ad88987c0166b7ba0e3f1f8f1bb" name="acdd84ad88987c0166b7ba0e3f1f8f1bb"></a>
  105. <h2 class="memtitle"><span class="permalink"><a href="#acdd84ad88987c0166b7ba0e3f1f8f1bb">&#9670;&nbsp;</a></span>printbuf_length</h2>
  106. <div class="memitem">
  107. <div class="memproto">
  108. <table class="memname">
  109. <tr>
  110. <td class="memname">#define printbuf_length</td>
  111. <td>(</td>
  112. <td class="paramtype">&#160;</td>
  113. <td class="paramname">p</td><td>)</td>
  114. <td>&#160;&#160;&#160;((p)-&gt;bpos)</td>
  115. </tr>
  116. </table>
  117. </div><div class="memdoc">
  118. </div>
  119. </div>
  120. <a id="a6f3a4dc87fab41c37e3eff42f40dc346" name="a6f3a4dc87fab41c37e3eff42f40dc346"></a>
  121. <h2 class="memtitle"><span class="permalink"><a href="#a6f3a4dc87fab41c37e3eff42f40dc346">&#9670;&nbsp;</a></span>printbuf_memappend_fast</h2>
  122. <div class="memitem">
  123. <div class="memproto">
  124. <table class="memname">
  125. <tr>
  126. <td class="memname">#define printbuf_memappend_fast</td>
  127. <td>(</td>
  128. <td class="paramtype">&#160;</td>
  129. <td class="paramname">p, </td>
  130. </tr>
  131. <tr>
  132. <td class="paramkey"></td>
  133. <td></td>
  134. <td class="paramtype">&#160;</td>
  135. <td class="paramname">bufptr, </td>
  136. </tr>
  137. <tr>
  138. <td class="paramkey"></td>
  139. <td></td>
  140. <td class="paramtype">&#160;</td>
  141. <td class="paramname">bufsize&#160;</td>
  142. </tr>
  143. <tr>
  144. <td></td>
  145. <td>)</td>
  146. <td></td><td></td>
  147. </tr>
  148. </table>
  149. </div><div class="memdoc">
  150. <b>Value:</b><div class="fragment"><div class="line"> <span class="keywordflow">do</span> \</div>
  151. <div class="line"> { \</div>
  152. <div class="line"> if ((p-&gt;size - p-&gt;bpos) &gt; bufsize) \</div>
  153. <div class="line"> { \</div>
  154. <div class="line"> memcpy(p-&gt;buf + p-&gt;bpos, (bufptr), bufsize); \</div>
  155. <div class="line"> p-&gt;bpos += bufsize; \</div>
  156. <div class="line"> p-&gt;buf[p-&gt;bpos] = <span class="charliteral">&#39;\0&#39;</span>; \</div>
  157. <div class="line"> } \</div>
  158. <div class="line"> else \</div>
  159. <div class="line"> { \</div>
  160. <div class="line"> printbuf_memappend(p, (bufptr), bufsize); \</div>
  161. <div class="line"> } \</div>
  162. <div class="line"> } <span class="keywordflow">while</span> (0)</div>
  163. </div><!-- fragment -->
  164. </div>
  165. </div>
  166. <a id="a2f30492682f5fbc59a8749b428e0e4ba" name="a2f30492682f5fbc59a8749b428e0e4ba"></a>
  167. <h2 class="memtitle"><span class="permalink"><a href="#a2f30492682f5fbc59a8749b428e0e4ba">&#9670;&nbsp;</a></span>printbuf_strappend</h2>
  168. <div class="memitem">
  169. <div class="memproto">
  170. <table class="memname">
  171. <tr>
  172. <td class="memname">#define printbuf_strappend</td>
  173. <td>(</td>
  174. <td class="paramtype">&#160;</td>
  175. <td class="paramname">pb, </td>
  176. </tr>
  177. <tr>
  178. <td class="paramkey"></td>
  179. <td></td>
  180. <td class="paramtype">&#160;</td>
  181. <td class="paramname">str&#160;</td>
  182. </tr>
  183. <tr>
  184. <td></td>
  185. <td>)</td>
  186. <td></td><td>&#160;&#160;&#160; <a class="el" href="printbuf_8h.html#a9c193d30e9ca4936ea28a6c9e8e4f6f0">printbuf_memappend</a>((pb), _printbuf_check_literal(str), sizeof(str) - 1)</td>
  187. </tr>
  188. </table>
  189. </div><div class="memdoc">
  190. <p >This is an optimization wrapper around <a class="el" href="printbuf_8h.html#a9c193d30e9ca4936ea28a6c9e8e4f6f0">printbuf_memappend()</a> that is useful for appending string literals. Since the size of string constants is known at compile time, using this macro can avoid a costly strlen() call. This is especially helpful when a constant string must be appended many times. If you got here because of a compilation error caused by passing something other than a string literal, use <a class="el" href="printbuf_8h.html#a6f3a4dc87fab41c37e3eff42f40dc346">printbuf_memappend_fast()</a> in conjunction with strlen().</p>
  191. <p >See also: <a class="el" href="printbuf_8h.html#a6f3a4dc87fab41c37e3eff42f40dc346">printbuf_memappend_fast()</a> <a class="el" href="printbuf_8h.html#a9c193d30e9ca4936ea28a6c9e8e4f6f0">printbuf_memappend()</a> <a class="el" href="printbuf_8h.html#a61f6bc0b1ca5787f0faca6799d61a0bb">sprintbuf()</a> </p>
  192. </div>
  193. </div>
  194. <h2 class="groupheader">Typedef Documentation</h2>
  195. <a id="ace274df280df67463ff417b1b3392395" name="ace274df280df67463ff417b1b3392395"></a>
  196. <h2 class="memtitle"><span class="permalink"><a href="#ace274df280df67463ff417b1b3392395">&#9670;&nbsp;</a></span>printbuf</h2>
  197. <div class="memitem">
  198. <div class="memproto">
  199. <table class="memname">
  200. <tr>
  201. <td class="memname">typedef struct <a class="el" href="structprintbuf.html">printbuf</a> <a class="el" href="structprintbuf.html">printbuf</a></td>
  202. </tr>
  203. </table>
  204. </div><div class="memdoc">
  205. </div>
  206. </div>
  207. <h2 class="groupheader">Function Documentation</h2>
  208. <a id="a2b744266191ef5e3102fbf910e790a98" name="a2b744266191ef5e3102fbf910e790a98"></a>
  209. <h2 class="memtitle"><span class="permalink"><a href="#a2b744266191ef5e3102fbf910e790a98">&#9670;&nbsp;</a></span>printbuf_free()</h2>
  210. <div class="memitem">
  211. <div class="memproto">
  212. <table class="memname">
  213. <tr>
  214. <td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> void printbuf_free </td>
  215. <td>(</td>
  216. <td class="paramtype">struct <a class="el" href="structprintbuf.html">printbuf</a> *&#160;</td>
  217. <td class="paramname"><em>p</em></td><td>)</td>
  218. <td></td>
  219. </tr>
  220. </table>
  221. </div><div class="memdoc">
  222. </div>
  223. </div>
  224. <a id="a9c193d30e9ca4936ea28a6c9e8e4f6f0" name="a9c193d30e9ca4936ea28a6c9e8e4f6f0"></a>
  225. <h2 class="memtitle"><span class="permalink"><a href="#a9c193d30e9ca4936ea28a6c9e8e4f6f0">&#9670;&nbsp;</a></span>printbuf_memappend()</h2>
  226. <div class="memitem">
  227. <div class="memproto">
  228. <table class="memname">
  229. <tr>
  230. <td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> int printbuf_memappend </td>
  231. <td>(</td>
  232. <td class="paramtype">struct <a class="el" href="structprintbuf.html">printbuf</a> *&#160;</td>
  233. <td class="paramname"><em>p</em>, </td>
  234. </tr>
  235. <tr>
  236. <td class="paramkey"></td>
  237. <td></td>
  238. <td class="paramtype">const char *&#160;</td>
  239. <td class="paramname"><em>buf</em>, </td>
  240. </tr>
  241. <tr>
  242. <td class="paramkey"></td>
  243. <td></td>
  244. <td class="paramtype">int&#160;</td>
  245. <td class="paramname"><em>size</em>&#160;</td>
  246. </tr>
  247. <tr>
  248. <td></td>
  249. <td>)</td>
  250. <td></td><td></td>
  251. </tr>
  252. </table>
  253. </div><div class="memdoc">
  254. </div>
  255. </div>
  256. <a id="a93a27f4f8a092c58666724de23ae804d" name="a93a27f4f8a092c58666724de23ae804d"></a>
  257. <h2 class="memtitle"><span class="permalink"><a href="#a93a27f4f8a092c58666724de23ae804d">&#9670;&nbsp;</a></span>printbuf_memset()</h2>
  258. <div class="memitem">
  259. <div class="memproto">
  260. <table class="memname">
  261. <tr>
  262. <td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> int printbuf_memset </td>
  263. <td>(</td>
  264. <td class="paramtype">struct <a class="el" href="structprintbuf.html">printbuf</a> *&#160;</td>
  265. <td class="paramname"><em>pb</em>, </td>
  266. </tr>
  267. <tr>
  268. <td class="paramkey"></td>
  269. <td></td>
  270. <td class="paramtype">int&#160;</td>
  271. <td class="paramname"><em>offset</em>, </td>
  272. </tr>
  273. <tr>
  274. <td class="paramkey"></td>
  275. <td></td>
  276. <td class="paramtype">int&#160;</td>
  277. <td class="paramname"><em>charvalue</em>, </td>
  278. </tr>
  279. <tr>
  280. <td class="paramkey"></td>
  281. <td></td>
  282. <td class="paramtype">int&#160;</td>
  283. <td class="paramname"><em>len</em>&#160;</td>
  284. </tr>
  285. <tr>
  286. <td></td>
  287. <td>)</td>
  288. <td></td><td></td>
  289. </tr>
  290. </table>
  291. </div><div class="memdoc">
  292. <p >Set len bytes of the buffer to charvalue, starting at offset offset. Similar to calling memset(x, charvalue, len);</p>
  293. <p >The memory allocated for the buffer is extended as necessary.</p>
  294. <p >If offset is -1, this starts at the end of the current data in the buffer. </p>
  295. </div>
  296. </div>
  297. <a id="a569dcc73d06828580ab6d9034bf78fea" name="a569dcc73d06828580ab6d9034bf78fea"></a>
  298. <h2 class="memtitle"><span class="permalink"><a href="#a569dcc73d06828580ab6d9034bf78fea">&#9670;&nbsp;</a></span>printbuf_new()</h2>
  299. <div class="memitem">
  300. <div class="memproto">
  301. <table class="memname">
  302. <tr>
  303. <td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> struct <a class="el" href="structprintbuf.html">printbuf</a> * printbuf_new </td>
  304. <td>(</td>
  305. <td class="paramtype">void&#160;</td>
  306. <td class="paramname"></td><td>)</td>
  307. <td></td>
  308. </tr>
  309. </table>
  310. </div><div class="memdoc">
  311. </div>
  312. </div>
  313. <a id="a705c62167df13e65e04de9ae60f6e136" name="a705c62167df13e65e04de9ae60f6e136"></a>
  314. <h2 class="memtitle"><span class="permalink"><a href="#a705c62167df13e65e04de9ae60f6e136">&#9670;&nbsp;</a></span>printbuf_reset()</h2>
  315. <div class="memitem">
  316. <div class="memproto">
  317. <table class="memname">
  318. <tr>
  319. <td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> void printbuf_reset </td>
  320. <td>(</td>
  321. <td class="paramtype">struct <a class="el" href="structprintbuf.html">printbuf</a> *&#160;</td>
  322. <td class="paramname"><em>p</em></td><td>)</td>
  323. <td></td>
  324. </tr>
  325. </table>
  326. </div><div class="memdoc">
  327. </div>
  328. </div>
  329. <a id="a61f6bc0b1ca5787f0faca6799d61a0bb" name="a61f6bc0b1ca5787f0faca6799d61a0bb"></a>
  330. <h2 class="memtitle"><span class="permalink"><a href="#a61f6bc0b1ca5787f0faca6799d61a0bb">&#9670;&nbsp;</a></span>sprintbuf()</h2>
  331. <div class="memitem">
  332. <div class="memproto">
  333. <table class="memname">
  334. <tr>
  335. <td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> int sprintbuf </td>
  336. <td>(</td>
  337. <td class="paramtype">struct <a class="el" href="structprintbuf.html">printbuf</a> *&#160;</td>
  338. <td class="paramname"><em>p</em>, </td>
  339. </tr>
  340. <tr>
  341. <td class="paramkey"></td>
  342. <td></td>
  343. <td class="paramtype">const char *&#160;</td>
  344. <td class="paramname"><em>msg</em>, </td>
  345. </tr>
  346. <tr>
  347. <td class="paramkey"></td>
  348. <td></td>
  349. <td class="paramtype">&#160;</td>
  350. <td class="paramname"><em>...</em>&#160;</td>
  351. </tr>
  352. <tr>
  353. <td></td>
  354. <td>)</td>
  355. <td></td><td></td>
  356. </tr>
  357. </table>
  358. </div><div class="memdoc">
  359. <p >Formatted print to printbuf.</p>
  360. <p >This function is the most expensive of the available functions for appending string data to a printbuf and should be used only where convenience is more important than speed. Avoid using this function in high performance code or tight loops; in these scenarios, consider using snprintf() with a static buffer in conjunction with one of the printbuf_*append() functions.</p>
  361. <p >See also: <a class="el" href="printbuf_8h.html#a6f3a4dc87fab41c37e3eff42f40dc346">printbuf_memappend_fast()</a> <a class="el" href="printbuf_8h.html#a9c193d30e9ca4936ea28a6c9e8e4f6f0">printbuf_memappend()</a> <a class="el" href="printbuf_8h.html#a2f30492682f5fbc59a8749b428e0e4ba">printbuf_strappend()</a> </p>
  362. </div>
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