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  47.   <div class="headertitle"><div class="title">printbuf.h File Reference</div></div>

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  49. <div class="contents">

  50. 

  51. <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.  

  52. <a href="#details">More...</a></p>

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  54. <tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="nested-classes" name="nested-classes"></a>

  55. Data Structures</h2></td></tr>

  56. <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>

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  59. <tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="define-members" name="define-members"></a>

  60. Macros</h2></td></tr>

  61. <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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  63. <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>

  64. <tr class="separator:a6f3a4dc87fab41c37e3eff42f40dc346"><td class="memSeparator" colspan="2">&#160;</td></tr>

  65. <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>

  66. <tr class="separator:acdd84ad88987c0166b7ba0e3f1f8f1bb"><td class="memSeparator" colspan="2">&#160;</td></tr>

  67. <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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  70. <tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="typedef-members" name="typedef-members"></a>

  71. Typedefs</h2></td></tr>

  72. <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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  74. </table><table class="memberdecls">

  75. <tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="func-members" name="func-members"></a>

  76. Functions</h2></td></tr>

  77. <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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  89. </table>

  90. <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>

  91. <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>

  92. </div><h2 class="groupheader">Macro Definition Documentation</h2>

  93. <a id="a2a31d5c00f3a4712f2d5d62aee66344e" name="a2a31d5c00f3a4712f2d5d62aee66344e"></a>

  94. <h2 class="memtitle"><span class="permalink"><a href="#a2a31d5c00f3a4712f2d5d62aee66344e">&#9670;&nbsp;</a></span>JSON_EXPORT</h2>

  95. 

  96. <div class="memitem">

  97. <div class="memproto">

  98.       <table class="memname">

  99.         <tr>

  100.           <td class="memname">#define JSON_EXPORT&#160;&#160;&#160;extern</td>

  101.         </tr>

  102.       </table>

  103. </div><div class="memdoc">

  104. 

  105. </div>

  106. </div>

  107. <a id="acdd84ad88987c0166b7ba0e3f1f8f1bb" name="acdd84ad88987c0166b7ba0e3f1f8f1bb"></a>

  108. <h2 class="memtitle"><span class="permalink"><a href="#acdd84ad88987c0166b7ba0e3f1f8f1bb">&#9670;&nbsp;</a></span>printbuf_length</h2>

  109. 

  110. <div class="memitem">

  111. <div class="memproto">

  112.       <table class="memname">

  113.         <tr>

  114.           <td class="memname">#define printbuf_length</td>

  115.           <td>(</td>

  116.           <td class="paramtype">&#160;</td>

  117.           <td class="paramname">p</td><td>)</td>

  118.           <td>&#160;&#160;&#160;((p)-&gt;bpos)</td>

  119.         </tr>

  120.       </table>

  121. </div><div class="memdoc">

  122. 

  123. </div>

  124. </div>

  125. <a id="a6f3a4dc87fab41c37e3eff42f40dc346" name="a6f3a4dc87fab41c37e3eff42f40dc346"></a>

  126. <h2 class="memtitle"><span class="permalink"><a href="#a6f3a4dc87fab41c37e3eff42f40dc346">&#9670;&nbsp;</a></span>printbuf_memappend_fast</h2>

  127. 

  128. <div class="memitem">

  129. <div class="memproto">

  130.       <table class="memname">

  131.         <tr>

  132.           <td class="memname">#define printbuf_memappend_fast</td>

  133.           <td>(</td>

  134.           <td class="paramtype">&#160;</td>

  135.           <td class="paramname">p, </td>

  136.         </tr>

  137.         <tr>

  138.           <td class="paramkey"></td>

  139.           <td></td>

  140.           <td class="paramtype">&#160;</td>

  141.           <td class="paramname">bufptr, </td>

  142.         </tr>

  143.         <tr>

  144.           <td class="paramkey"></td>

  145.           <td></td>

  146.           <td class="paramtype">&#160;</td>

  147.           <td class="paramname">bufsize&#160;</td>

  148.         </tr>

  149.         <tr>

  150.           <td></td>

  151.           <td>)</td>

  152.           <td></td><td></td>

  153.         </tr>

  154.       </table>

  155. </div><div class="memdoc">

  156. <b>Value:</b><div class="fragment"><div class="line">        <span class="keywordflow">do</span>                                                           \</div>

  157. <div class="line">        {                                                            \</div>

  158. <div class="line">                if ((p-&gt;size - p-&gt;bpos) &gt; bufsize)                   \</div>

  159. <div class="line">                {                                                    \</div>

  160. <div class="line">                        memcpy(p-&gt;buf + p-&gt;bpos, (bufptr), bufsize); \</div>

  161. <div class="line">                        p-&gt;bpos += bufsize;                          \</div>

  162. <div class="line">                        p-&gt;buf[p-&gt;bpos] = <span class="charliteral">&#39;\0&#39;</span>;                      \</div>

  163. <div class="line">                }                                                    \</div>

  164. <div class="line">                else                                                 \</div>

  165. <div class="line">                {                                                    \</div>

  166. <div class="line">                        printbuf_memappend(p, (bufptr), bufsize);    \</div>

  167. <div class="line">                }                                                    \</div>

  168. <div class="line">        } <span class="keywordflow">while</span> (0)</div>

  169. </div><!-- fragment -->

  170. </div>

  171. </div>

  172. <a id="a2f30492682f5fbc59a8749b428e0e4ba" name="a2f30492682f5fbc59a8749b428e0e4ba"></a>

  173. <h2 class="memtitle"><span class="permalink"><a href="#a2f30492682f5fbc59a8749b428e0e4ba">&#9670;&nbsp;</a></span>printbuf_strappend</h2>

  174. 

  175. <div class="memitem">

  176. <div class="memproto">

  177.       <table class="memname">

  178.         <tr>

  179.           <td class="memname">#define printbuf_strappend</td>

  180.           <td>(</td>

  181.           <td class="paramtype">&#160;</td>

  182.           <td class="paramname">pb, </td>

  183.         </tr>

  184.         <tr>

  185.           <td class="paramkey"></td>

  186.           <td></td>

  187.           <td class="paramtype">&#160;</td>

  188.           <td class="paramname">str&#160;</td>

  189.         </tr>

  190.         <tr>

  191.           <td></td>

  192.           <td>)</td>

  193.           <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>

  194.         </tr>

  195.       </table>

  196. </div><div class="memdoc">

  197. <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>

  198. <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>

  199. 

  200. </div>

  201. </div>

  202. <h2 class="groupheader">Typedef Documentation</h2>

  203. <a id="ace274df280df67463ff417b1b3392395" name="ace274df280df67463ff417b1b3392395"></a>

  204. <h2 class="memtitle"><span class="permalink"><a href="#ace274df280df67463ff417b1b3392395">&#9670;&nbsp;</a></span>printbuf</h2>

  205. 

  206. <div class="memitem">

  207. <div class="memproto">

  208.       <table class="memname">

  209.         <tr>

  210.           <td class="memname">typedef struct <a class="el" href="structprintbuf.html">printbuf</a> <a class="el" href="structprintbuf.html">printbuf</a></td>

  211.         </tr>

  212.       </table>

  213. </div><div class="memdoc">

  214. 

  215. </div>

  216. </div>

  217. <h2 class="groupheader">Function Documentation</h2>

  218. <a id="a2b744266191ef5e3102fbf910e790a98" name="a2b744266191ef5e3102fbf910e790a98"></a>

  219. <h2 class="memtitle"><span class="permalink"><a href="#a2b744266191ef5e3102fbf910e790a98">&#9670;&nbsp;</a></span>printbuf_free()</h2>

  220. 

  221. <div class="memitem">

  222. <div class="memproto">

  223.       <table class="memname">

  224.         <tr>

  225.           <td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> void printbuf_free </td>

  226.           <td>(</td>

  227.           <td class="paramtype">struct <a class="el" href="structprintbuf.html">printbuf</a> *&#160;</td>

  228.           <td class="paramname"><em>p</em></td><td>)</td>

  229.           <td></td>

  230.         </tr>

  231.       </table>

  232. </div><div class="memdoc">

  233. 

  234. </div>

  235. </div>

  236. <a id="a9c193d30e9ca4936ea28a6c9e8e4f6f0" name="a9c193d30e9ca4936ea28a6c9e8e4f6f0"></a>

  237. <h2 class="memtitle"><span class="permalink"><a href="#a9c193d30e9ca4936ea28a6c9e8e4f6f0">&#9670;&nbsp;</a></span>printbuf_memappend()</h2>

  238. 

  239. <div class="memitem">

  240. <div class="memproto">

  241.       <table class="memname">

  242.         <tr>

  243.           <td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> int printbuf_memappend </td>

  244.           <td>(</td>

  245.           <td class="paramtype">struct <a class="el" href="structprintbuf.html">printbuf</a> *&#160;</td>

  246.           <td class="paramname"><em>p</em>, </td>

  247.         </tr>

  248.         <tr>

  249.           <td class="paramkey"></td>

  250.           <td></td>

  251.           <td class="paramtype">const char *&#160;</td>

  252.           <td class="paramname"><em>buf</em>, </td>

  253.         </tr>

  254.         <tr>

  255.           <td class="paramkey"></td>

  256.           <td></td>

  257.           <td class="paramtype">int&#160;</td>

  258.           <td class="paramname"><em>size</em>&#160;</td>

  259.         </tr>

  260.         <tr>

  261.           <td></td>

  262.           <td>)</td>

  263.           <td></td><td></td>

  264.         </tr>

  265.       </table>

  266. </div><div class="memdoc">

  267. 

  268. </div>

  269. </div>

  270. <a id="a93a27f4f8a092c58666724de23ae804d" name="a93a27f4f8a092c58666724de23ae804d"></a>

  271. <h2 class="memtitle"><span class="permalink"><a href="#a93a27f4f8a092c58666724de23ae804d">&#9670;&nbsp;</a></span>printbuf_memset()</h2>

  272. 

  273. <div class="memitem">

  274. <div class="memproto">

  275.       <table class="memname">

  276.         <tr>

  277.           <td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> int printbuf_memset </td>

  278.           <td>(</td>

  279.           <td class="paramtype">struct <a class="el" href="structprintbuf.html">printbuf</a> *&#160;</td>

  280.           <td class="paramname"><em>pb</em>, </td>

  281.         </tr>

  282.         <tr>

  283.           <td class="paramkey"></td>

  284.           <td></td>

  285.           <td class="paramtype">int&#160;</td>

  286.           <td class="paramname"><em>offset</em>, </td>

  287.         </tr>

  288.         <tr>

  289.           <td class="paramkey"></td>

  290.           <td></td>

  291.           <td class="paramtype">int&#160;</td>

  292.           <td class="paramname"><em>charvalue</em>, </td>

  293.         </tr>

  294.         <tr>

  295.           <td class="paramkey"></td>

  296.           <td></td>

  297.           <td class="paramtype">int&#160;</td>

  298.           <td class="paramname"><em>len</em>&#160;</td>

  299.         </tr>

  300.         <tr>

  301.           <td></td>

  302.           <td>)</td>

  303.           <td></td><td></td>

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  306. </div><div class="memdoc">

  307. <p >Set len bytes of the buffer to charvalue, starting at offset offset. Similar to calling memset(x, charvalue, len);</p>

  308. <p >The memory allocated for the buffer is extended as necessary.</p>

  309. <p >If offset is -1, this starts at the end of the current data in the buffer. </p>

  310. 

  311. </div>

  312. </div>

  313. <a id="a569dcc73d06828580ab6d9034bf78fea" name="a569dcc73d06828580ab6d9034bf78fea"></a>

  314. <h2 class="memtitle"><span class="permalink"><a href="#a569dcc73d06828580ab6d9034bf78fea">&#9670;&nbsp;</a></span>printbuf_new()</h2>

  315. 

  316. <div class="memitem">

  317. <div class="memproto">

  318.       <table class="memname">

  319.         <tr>

  320.           <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>

  321.           <td>(</td>

  322.           <td class="paramtype">void&#160;</td>

  323.           <td class="paramname"></td><td>)</td>

  324.           <td></td>

  325.         </tr>

  326.       </table>

  327. </div><div class="memdoc">

  328. 

  329. </div>

  330. </div>

  331. <a id="a705c62167df13e65e04de9ae60f6e136" name="a705c62167df13e65e04de9ae60f6e136"></a>

  332. <h2 class="memtitle"><span class="permalink"><a href="#a705c62167df13e65e04de9ae60f6e136">&#9670;&nbsp;</a></span>printbuf_reset()</h2>

  333. 

  334. <div class="memitem">

  335. <div class="memproto">

  336.       <table class="memname">

  337.         <tr>

  338.           <td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> void printbuf_reset </td>

  339.           <td>(</td>

  340.           <td class="paramtype">struct <a class="el" href="structprintbuf.html">printbuf</a> *&#160;</td>

  341.           <td class="paramname"><em>p</em></td><td>)</td>

  342.           <td></td>

  343.         </tr>

  344.       </table>

  345. </div><div class="memdoc">

  346. 

  347. </div>

  348. </div>

  349. <a id="a61f6bc0b1ca5787f0faca6799d61a0bb" name="a61f6bc0b1ca5787f0faca6799d61a0bb"></a>

  350. <h2 class="memtitle"><span class="permalink"><a href="#a61f6bc0b1ca5787f0faca6799d61a0bb">&#9670;&nbsp;</a></span>sprintbuf()</h2>

  351. 

  352. <div class="memitem">

  353. <div class="memproto">

  354.       <table class="memname">

  355.         <tr>

  356.           <td class="memname"><a class="el" href="printbuf_8h.html#a2a31d5c00f3a4712f2d5d62aee66344e">JSON_EXPORT</a> int sprintbuf </td>

  357.           <td>(</td>

  358.           <td class="paramtype">struct <a class="el" href="structprintbuf.html">printbuf</a> *&#160;</td>

  359.           <td class="paramname"><em>p</em>, </td>

  360.         </tr>

  361.         <tr>

  362.           <td class="paramkey"></td>

  363.           <td></td>

  364.           <td class="paramtype">const char *&#160;</td>

  365.           <td class="paramname"><em>msg</em>, </td>

  366.         </tr>

  367.         <tr>

  368.           <td class="paramkey"></td>

  369.           <td></td>

  370.           <td class="paramtype">&#160;</td>

  371.           <td class="paramname"><em>...</em>&#160;</td>

  372.         </tr>

  373.         <tr>

  374.           <td></td>

  375.           <td>)</td>

  376.           <td></td><td></td>

  377.         </tr>

  378.       </table>

  379. </div><div class="memdoc">

  380. <p >Formatted print to printbuf.</p>

  381. <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>

  382. <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>

  383. 

  384. </div>

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