Sophie

Sophie

distrib > Fedora > 15 > i386 > by-pkgid > e3a718fcad37ff363f65d6a6e994e272 > files > 50

ldns-devel-1.6.12-1.fc15.i686.rpm

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html><head><meta http-equiv="Content-Type"
content="text/html;charset=iso-8859-1">
<title>ldns documentation</title>
<link href="doxygen.css" rel="stylesheet" type="text/css">
<link href="tabs.css" rel="stylesheet" type="text/css">
</head><body>
<div class="logo">
<img src="LogoInGradientBar2-y100.png"/>
</div>
<!-- Generated by Doxygen 1.7.4 -->
  <div id="navrow1" class="tabs">
    <ul class="tablist">
      <li><a href="index.html"><span>Main&#160;Page</span></a></li>
      <li><a href="pages.html"><span>Related&#160;Pages</span></a></li>
      <li><a href="annotated.html"><span>Data&#160;Structures</span></a></li>
      <li class="current"><a href="files.html"><span>Files</span></a></li>
      <li><a href="dirs.html"><span>Directories</span></a></li>
    </ul>
  </div>
  <div id="navrow2" class="tabs2">
    <ul class="tablist">
      <li><a href="files.html"><span>File&#160;List</span></a></li>
      <li><a href="globals.html"><span>Globals</span></a></li>
    </ul>
  </div>
<div class="header">
  <div class="headertitle">
<div class="title">buffer.c</div>  </div>
</div>
<div class="contents">
<a href="buffer_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> * buffer.c -- generic memory buffer .</span>
<a name="l00003"></a>00003 <span class="comment"> *</span>
<a name="l00004"></a>00004 <span class="comment"> * Copyright (c) 2001-2008, NLnet Labs. All rights reserved.</span>
<a name="l00005"></a>00005 <span class="comment"> *</span>
<a name="l00006"></a>00006 <span class="comment"> * See LICENSE for the license.</span>
<a name="l00007"></a>00007 <span class="comment"> *</span>
<a name="l00008"></a>00008 <span class="comment"> */</span>
<a name="l00009"></a>00009 
<a name="l00010"></a>00010 <span class="preprocessor">#include &lt;<a class="code" href="ldns_2config_8h.html">ldns/config.h</a>&gt;</span>
<a name="l00011"></a>00011 
<a name="l00012"></a>00012 <span class="preprocessor">#include &lt;<a class="code" href="ldns_8h.html" title="Including this file will include all ldns files, and define some lookup tables.">ldns/ldns.h</a>&gt;</span>
<a name="l00013"></a>00013 <span class="preprocessor">#include &lt;<a class="code" href="buffer_8h.html" title="This file contains the definition of ldns_buffer, and functions to manipulate those.">ldns/buffer.h</a>&gt;</span>
<a name="l00014"></a>00014 
<a name="l00015"></a>00015 <a class="code" href="structldns__struct__buffer.html" title="implementation of buffers to ease operations">ldns_buffer</a> *
<a name="l00016"></a><a class="code" href="buffer_8h.html#ac6d413e9a76bf7e7c2022f13e36b9900">00016</a> <a class="code" href="buffer_8c.html#ac6d413e9a76bf7e7c2022f13e36b9900" title="creates a new buffer with the specified capacity.">ldns_buffer_new</a>(<span class="keywordtype">size_t</span> capacity)
<a name="l00017"></a>00017 {
<a name="l00018"></a>00018         <a class="code" href="structldns__struct__buffer.html" title="implementation of buffers to ease operations">ldns_buffer</a> *buffer = <a class="code" href="util_8h.html#a828619b138fdeb9756cd3c874d0551c1" title="Memory management macros.">LDNS_MALLOC</a>(<a class="code" href="structldns__struct__buffer.html" title="implementation of buffers to ease operations">ldns_buffer</a>);
<a name="l00019"></a>00019 
<a name="l00020"></a>00020         <span class="keywordflow">if</span> (!buffer) {
<a name="l00021"></a>00021                 <span class="keywordflow">return</span> NULL;
<a name="l00022"></a>00022         }
<a name="l00023"></a>00023         
<a name="l00024"></a>00024         buffer-&gt;<a class="code" href="structldns__struct__buffer.html#ae4e2615ee600913816488ec2945b85c7" title="The data contained in the buffer.">_data</a> = (uint8_t *) <a class="code" href="util_8h.html#aaad6949daea3c6cefd01d19300f6e21a">LDNS_XMALLOC</a>(uint8_t, capacity);
<a name="l00025"></a>00025         <span class="keywordflow">if</span> (!buffer-&gt;<a class="code" href="structldns__struct__buffer.html#ae4e2615ee600913816488ec2945b85c7" title="The data contained in the buffer.">_data</a>) {
<a name="l00026"></a>00026                 <a class="code" href="util_8h.html#a5e13054aa9b3843e97514228a0bbe909">LDNS_FREE</a>(buffer);
<a name="l00027"></a>00027                 <span class="keywordflow">return</span> NULL;
<a name="l00028"></a>00028         }
<a name="l00029"></a>00029         
<a name="l00030"></a>00030         buffer-&gt;<a class="code" href="structldns__struct__buffer.html#ac62e89526e2292f430cb815620ee2ebb" title="The current position used for reading/writing.">_position</a> = 0;
<a name="l00031"></a>00031         buffer-&gt;<a class="code" href="structldns__struct__buffer.html#af6eb085e24852584020b4bc5459d4cf5" title="The read/write limit.">_limit</a> = buffer-&gt;<a class="code" href="structldns__struct__buffer.html#a0e2253a51f3cfb0a8c8b23d288861326" title="The amount of data the buffer can contain.">_capacity</a> = capacity;
<a name="l00032"></a>00032         buffer-&gt;<a class="code" href="structldns__struct__buffer.html#a67628b76dc8f1e174fa5667e2543bf4a" title="If the buffer is fixed it cannot be resized.">_fixed</a> = 0;
<a name="l00033"></a>00033         buffer-&gt;<a class="code" href="structldns__struct__buffer.html#ad19d973074968b399a74f32b6402c05c" title="The current state of the buffer.">_status</a> = <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afac58492ee3fc8d23f33c79824ed08c465">LDNS_STATUS_OK</a>;
<a name="l00034"></a>00034         
<a name="l00035"></a>00035         ldns_buffer_invariant(buffer);
<a name="l00036"></a>00036         
<a name="l00037"></a>00037         <span class="keywordflow">return</span> buffer;
<a name="l00038"></a>00038 }
<a name="l00039"></a>00039 
<a name="l00040"></a>00040 <span class="keywordtype">void</span>
<a name="l00041"></a><a class="code" href="buffer_8h.html#a7f33a4c147914739da73ccc4caa2bd7f">00041</a> <a class="code" href="buffer_8c.html#a7f33a4c147914739da73ccc4caa2bd7f" title="creates a buffer with the specified data.">ldns_buffer_new_frm_data</a>(<a class="code" href="structldns__struct__buffer.html" title="implementation of buffers to ease operations">ldns_buffer</a> *buffer, <span class="keywordtype">void</span> *data, <span class="keywordtype">size_t</span> size)
<a name="l00042"></a>00042 {
<a name="l00043"></a>00043         assert(data != NULL);
<a name="l00044"></a>00044 
<a name="l00045"></a>00045         buffer-&gt;<a class="code" href="structldns__struct__buffer.html#ac62e89526e2292f430cb815620ee2ebb" title="The current position used for reading/writing.">_position</a> = 0; 
<a name="l00046"></a>00046         buffer-&gt;<a class="code" href="structldns__struct__buffer.html#af6eb085e24852584020b4bc5459d4cf5" title="The read/write limit.">_limit</a> = buffer-&gt;<a class="code" href="structldns__struct__buffer.html#a0e2253a51f3cfb0a8c8b23d288861326" title="The amount of data the buffer can contain.">_capacity</a> = size;
<a name="l00047"></a>00047         buffer-&gt;<a class="code" href="structldns__struct__buffer.html#a67628b76dc8f1e174fa5667e2543bf4a" title="If the buffer is fixed it cannot be resized.">_fixed</a> = 0;
<a name="l00048"></a>00048         buffer-&gt;<a class="code" href="structldns__struct__buffer.html#ae4e2615ee600913816488ec2945b85c7" title="The data contained in the buffer.">_data</a> = <a class="code" href="util_8h.html#aaad6949daea3c6cefd01d19300f6e21a">LDNS_XMALLOC</a>(uint8_t, size);
<a name="l00049"></a>00049         <span class="keywordflow">if</span>(!buffer-&gt;<a class="code" href="structldns__struct__buffer.html#ae4e2615ee600913816488ec2945b85c7" title="The data contained in the buffer.">_data</a>) {
<a name="l00050"></a>00050                 buffer-&gt;<a class="code" href="structldns__struct__buffer.html#ad19d973074968b399a74f32b6402c05c" title="The current state of the buffer.">_status</a> = <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afa81e80e66a14551db514726fa49290498">LDNS_STATUS_MEM_ERR</a>;
<a name="l00051"></a>00051                 <span class="keywordflow">return</span>;
<a name="l00052"></a>00052         }
<a name="l00053"></a>00053         memcpy(buffer-&gt;<a class="code" href="structldns__struct__buffer.html#ae4e2615ee600913816488ec2945b85c7" title="The data contained in the buffer.">_data</a>, data, size);
<a name="l00054"></a>00054         buffer-&gt;<a class="code" href="structldns__struct__buffer.html#ad19d973074968b399a74f32b6402c05c" title="The current state of the buffer.">_status</a> = <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afac58492ee3fc8d23f33c79824ed08c465">LDNS_STATUS_OK</a>;
<a name="l00055"></a>00055         
<a name="l00056"></a>00056         ldns_buffer_invariant(buffer);
<a name="l00057"></a>00057 }
<a name="l00058"></a>00058 
<a name="l00059"></a>00059 <span class="keywordtype">bool</span>
<a name="l00060"></a><a class="code" href="buffer_8h.html#a4e16fc0b5f97c6a3d91533c93f8f47c2">00060</a> <a class="code" href="buffer_8c.html#a4e16fc0b5f97c6a3d91533c93f8f47c2" title="changes the buffer&#39;s capacity.">ldns_buffer_set_capacity</a>(<a class="code" href="structldns__struct__buffer.html" title="implementation of buffers to ease operations">ldns_buffer</a> *buffer, <span class="keywordtype">size_t</span> capacity)
<a name="l00061"></a>00061 {
<a name="l00062"></a>00062         <span class="keywordtype">void</span> *data;
<a name="l00063"></a>00063         
<a name="l00064"></a>00064         ldns_buffer_invariant(buffer);
<a name="l00065"></a>00065         assert(buffer-&gt;<a class="code" href="structldns__struct__buffer.html#ac62e89526e2292f430cb815620ee2ebb" title="The current position used for reading/writing.">_position</a> &lt;= capacity);
<a name="l00066"></a>00066 
<a name="l00067"></a>00067         data = (uint8_t *) <a class="code" href="util_8h.html#aef91214266c90875fa06e4a47e734538">LDNS_XREALLOC</a>(buffer-&gt;<a class="code" href="structldns__struct__buffer.html#ae4e2615ee600913816488ec2945b85c7" title="The data contained in the buffer.">_data</a>, uint8_t, capacity);
<a name="l00068"></a>00068         <span class="keywordflow">if</span> (!data) {
<a name="l00069"></a>00069                 buffer-&gt;<a class="code" href="structldns__struct__buffer.html#ad19d973074968b399a74f32b6402c05c" title="The current state of the buffer.">_status</a> = <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afa81e80e66a14551db514726fa49290498">LDNS_STATUS_MEM_ERR</a>;
<a name="l00070"></a>00070                 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00071"></a>00071         } <span class="keywordflow">else</span> {
<a name="l00072"></a>00072                 buffer-&gt;<a class="code" href="structldns__struct__buffer.html#ae4e2615ee600913816488ec2945b85c7" title="The data contained in the buffer.">_data</a> = data;
<a name="l00073"></a>00073                 buffer-&gt;<a class="code" href="structldns__struct__buffer.html#af6eb085e24852584020b4bc5459d4cf5" title="The read/write limit.">_limit</a> = buffer-&gt;<a class="code" href="structldns__struct__buffer.html#a0e2253a51f3cfb0a8c8b23d288861326" title="The amount of data the buffer can contain.">_capacity</a> = capacity;
<a name="l00074"></a>00074                 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00075"></a>00075         }
<a name="l00076"></a>00076 }
<a name="l00077"></a>00077 
<a name="l00078"></a>00078 <span class="keywordtype">bool</span>
<a name="l00079"></a><a class="code" href="buffer_8h.html#a8ba0bcb3201dae8d3e563ed201decc7c">00079</a> <a class="code" href="buffer_8c.html#a8ba0bcb3201dae8d3e563ed201decc7c" title="ensures BUFFER can contain at least AMOUNT more bytes.">ldns_buffer_reserve</a>(<a class="code" href="structldns__struct__buffer.html" title="implementation of buffers to ease operations">ldns_buffer</a> *buffer, <span class="keywordtype">size_t</span> amount)
<a name="l00080"></a>00080 {
<a name="l00081"></a>00081         ldns_buffer_invariant(buffer);
<a name="l00082"></a>00082         assert(!buffer-&gt;<a class="code" href="structldns__struct__buffer.html#a67628b76dc8f1e174fa5667e2543bf4a" title="If the buffer is fixed it cannot be resized.">_fixed</a>);
<a name="l00083"></a>00083         <span class="keywordflow">if</span> (buffer-&gt;<a class="code" href="structldns__struct__buffer.html#a0e2253a51f3cfb0a8c8b23d288861326" title="The amount of data the buffer can contain.">_capacity</a> &lt; buffer-&gt;<a class="code" href="structldns__struct__buffer.html#ac62e89526e2292f430cb815620ee2ebb" title="The current position used for reading/writing.">_position</a> + amount) {
<a name="l00084"></a>00084                 <span class="keywordtype">size_t</span> new_capacity = buffer-&gt;<a class="code" href="structldns__struct__buffer.html#a0e2253a51f3cfb0a8c8b23d288861326" title="The amount of data the buffer can contain.">_capacity</a> * 3 / 2;
<a name="l00085"></a>00085 
<a name="l00086"></a>00086                 <span class="keywordflow">if</span> (new_capacity &lt; buffer-&gt;_position + amount) {
<a name="l00087"></a>00087                         new_capacity = buffer-&gt;<a class="code" href="structldns__struct__buffer.html#ac62e89526e2292f430cb815620ee2ebb" title="The current position used for reading/writing.">_position</a> + amount;
<a name="l00088"></a>00088                 }
<a name="l00089"></a>00089                 <span class="keywordflow">if</span> (!<a class="code" href="buffer_8c.html#a4e16fc0b5f97c6a3d91533c93f8f47c2" title="changes the buffer&#39;s capacity.">ldns_buffer_set_capacity</a>(buffer, new_capacity)) {
<a name="l00090"></a>00090                         buffer-&gt;<a class="code" href="structldns__struct__buffer.html#ad19d973074968b399a74f32b6402c05c" title="The current state of the buffer.">_status</a> = <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afa81e80e66a14551db514726fa49290498">LDNS_STATUS_MEM_ERR</a>;
<a name="l00091"></a>00091                         <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00092"></a>00092                 }
<a name="l00093"></a>00093         }
<a name="l00094"></a>00094         buffer-&gt;<a class="code" href="structldns__struct__buffer.html#af6eb085e24852584020b4bc5459d4cf5" title="The read/write limit.">_limit</a> = buffer-&gt;<a class="code" href="structldns__struct__buffer.html#a0e2253a51f3cfb0a8c8b23d288861326" title="The amount of data the buffer can contain.">_capacity</a>;
<a name="l00095"></a>00095         <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00096"></a>00096 }
<a name="l00097"></a>00097 
<a name="l00098"></a>00098 <span class="keywordtype">int</span>
<a name="l00099"></a><a class="code" href="buffer_8h.html#ad0bd2ed28633df90c9c99974eaae4b5a">00099</a> <a class="code" href="buffer_8c.html#ad0bd2ed28633df90c9c99974eaae4b5a" title="prints to the buffer, increasing the capacity if required using buffer_reserve().">ldns_buffer_printf</a>(<a class="code" href="structldns__struct__buffer.html" title="implementation of buffers to ease operations">ldns_buffer</a> *buffer, <span class="keyword">const</span> <span class="keywordtype">char</span> *format, ...)
<a name="l00100"></a>00100 {
<a name="l00101"></a>00101         va_list args;
<a name="l00102"></a>00102         <span class="keywordtype">int</span> written = 0;
<a name="l00103"></a>00103         <span class="keywordtype">size_t</span> remaining;
<a name="l00104"></a>00104         
<a name="l00105"></a>00105         <span class="keywordflow">if</span> (ldns_buffer_status_ok(buffer)) {
<a name="l00106"></a>00106                 ldns_buffer_invariant(buffer);
<a name="l00107"></a>00107                 assert(buffer-&gt;<a class="code" href="structldns__struct__buffer.html#af6eb085e24852584020b4bc5459d4cf5" title="The read/write limit.">_limit</a> == buffer-&gt;<a class="code" href="structldns__struct__buffer.html#a0e2253a51f3cfb0a8c8b23d288861326" title="The amount of data the buffer can contain.">_capacity</a>);
<a name="l00108"></a>00108 
<a name="l00109"></a>00109                 remaining = ldns_buffer_remaining(buffer);
<a name="l00110"></a>00110                 va_start(args, format);
<a name="l00111"></a>00111                 written = <a class="code" href="config_8h.html#a90f649eb9607cf5003051e74c60b39a6">vsnprintf</a>((<span class="keywordtype">char</span> *) ldns_buffer_current(buffer), remaining,
<a name="l00112"></a>00112                                     format, args);
<a name="l00113"></a>00113                 va_end(args);
<a name="l00114"></a>00114                 <span class="keywordflow">if</span> (written == -1) {
<a name="l00115"></a>00115                         buffer-&gt;<a class="code" href="structldns__struct__buffer.html#ad19d973074968b399a74f32b6402c05c" title="The current state of the buffer.">_status</a> = <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afa9029a7994da0e2f27cff8848a6c6f9da">LDNS_STATUS_INTERNAL_ERR</a>;
<a name="l00116"></a>00116                         <span class="keywordflow">return</span> -1;
<a name="l00117"></a>00117                 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> ((<span class="keywordtype">size_t</span>) written &gt;= remaining) {
<a name="l00118"></a>00118                         <span class="keywordflow">if</span> (!<a class="code" href="buffer_8c.html#a8ba0bcb3201dae8d3e563ed201decc7c" title="ensures BUFFER can contain at least AMOUNT more bytes.">ldns_buffer_reserve</a>(buffer, (<span class="keywordtype">size_t</span>) written + 1)) {
<a name="l00119"></a>00119                                 buffer-&gt;<a class="code" href="structldns__struct__buffer.html#ad19d973074968b399a74f32b6402c05c" title="The current state of the buffer.">_status</a> = <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afa81e80e66a14551db514726fa49290498">LDNS_STATUS_MEM_ERR</a>;
<a name="l00120"></a>00120                                 <span class="keywordflow">return</span> -1;
<a name="l00121"></a>00121                         }
<a name="l00122"></a>00122                         va_start(args, format);
<a name="l00123"></a>00123                         written = <a class="code" href="config_8h.html#a90f649eb9607cf5003051e74c60b39a6">vsnprintf</a>((<span class="keywordtype">char</span> *) ldns_buffer_current(buffer),
<a name="l00124"></a>00124                             ldns_buffer_remaining(buffer), format, args);
<a name="l00125"></a>00125                         va_end(args);
<a name="l00126"></a>00126                         <span class="keywordflow">if</span> (written == -1) {
<a name="l00127"></a>00127                                 buffer-&gt;<a class="code" href="structldns__struct__buffer.html#ad19d973074968b399a74f32b6402c05c" title="The current state of the buffer.">_status</a> = <a class="code" href="error_8h.html#a11f34802bb1624af46054952e3b853afa9029a7994da0e2f27cff8848a6c6f9da">LDNS_STATUS_INTERNAL_ERR</a>;
<a name="l00128"></a>00128                                 <span class="keywordflow">return</span> -1;
<a name="l00129"></a>00129                         }
<a name="l00130"></a>00130                 }
<a name="l00131"></a>00131                 buffer-&gt;<a class="code" href="structldns__struct__buffer.html#ac62e89526e2292f430cb815620ee2ebb" title="The current position used for reading/writing.">_position</a> += written;
<a name="l00132"></a>00132         }
<a name="l00133"></a>00133         <span class="keywordflow">return</span> written;
<a name="l00134"></a>00134 }
<a name="l00135"></a>00135 
<a name="l00136"></a>00136 <span class="keywordtype">void</span>
<a name="l00137"></a><a class="code" href="buffer_8h.html#a1615da957ad5a24a8b5cc1ba2f2b7f44">00137</a> <a class="code" href="buffer_8c.html#a1615da957ad5a24a8b5cc1ba2f2b7f44" title="frees the buffer.">ldns_buffer_free</a>(<a class="code" href="structldns__struct__buffer.html" title="implementation of buffers to ease operations">ldns_buffer</a> *buffer)
<a name="l00138"></a>00138 {
<a name="l00139"></a>00139         <span class="keywordflow">if</span> (!buffer) {
<a name="l00140"></a>00140                 <span class="keywordflow">return</span>;
<a name="l00141"></a>00141         }
<a name="l00142"></a>00142 
<a name="l00143"></a>00143         <a class="code" href="util_8h.html#a5e13054aa9b3843e97514228a0bbe909">LDNS_FREE</a>(buffer-&gt;<a class="code" href="structldns__struct__buffer.html#ae4e2615ee600913816488ec2945b85c7" title="The data contained in the buffer.">_data</a>);
<a name="l00144"></a>00144 
<a name="l00145"></a>00145         <a class="code" href="util_8h.html#a5e13054aa9b3843e97514228a0bbe909">LDNS_FREE</a>(buffer);
<a name="l00146"></a>00146 }
<a name="l00147"></a>00147 
<a name="l00148"></a>00148 <span class="keywordtype">void</span> *
<a name="l00149"></a><a class="code" href="buffer_8h.html#aedc3ca34290f5faad3cca548bb7125ab">00149</a> <a class="code" href="buffer_8c.html#aedc3ca34290f5faad3cca548bb7125ab" title="Makes the buffer fixed and returns a pointer to the data.">ldns_buffer_export</a>(<a class="code" href="structldns__struct__buffer.html" title="implementation of buffers to ease operations">ldns_buffer</a> *buffer)
<a name="l00150"></a>00150 {
<a name="l00151"></a>00151         buffer-&gt;<a class="code" href="structldns__struct__buffer.html#a67628b76dc8f1e174fa5667e2543bf4a" title="If the buffer is fixed it cannot be resized.">_fixed</a> = 1;
<a name="l00152"></a>00152         <span class="keywordflow">return</span> buffer-&gt;<a class="code" href="structldns__struct__buffer.html#ae4e2615ee600913816488ec2945b85c7" title="The data contained in the buffer.">_data</a>;
<a name="l00153"></a>00153 }
<a name="l00154"></a>00154 
<a name="l00155"></a>00155 <span class="keywordtype">int</span>
<a name="l00156"></a><a class="code" href="parse_8h.html#ac133a49136532ac36150f4378c45bd28">00156</a> <a class="code" href="buffer_8c.html#ac133a49136532ac36150f4378c45bd28" title="returns the next character from a buffer.">ldns_bgetc</a>(<a class="code" href="structldns__struct__buffer.html" title="implementation of buffers to ease operations">ldns_buffer</a> *buffer)
<a name="l00157"></a>00157 {
<a name="l00158"></a>00158         <span class="keywordflow">if</span> (!ldns_buffer_available_at(buffer, buffer-&gt;<a class="code" href="structldns__struct__buffer.html#ac62e89526e2292f430cb815620ee2ebb" title="The current position used for reading/writing.">_position</a>, <span class="keyword">sizeof</span>(uint8_t))) {
<a name="l00159"></a>00159                 ldns_buffer_set_position(buffer, ldns_buffer_limit(buffer));
<a name="l00160"></a>00160                 <span class="comment">/* ldns_buffer_rewind(buffer);*/</span>
<a name="l00161"></a>00161                 <span class="keywordflow">return</span> EOF;
<a name="l00162"></a>00162         }
<a name="l00163"></a>00163         <span class="keywordflow">return</span> (<span class="keywordtype">int</span>)ldns_buffer_read_u8(buffer);
<a name="l00164"></a>00164 }
<a name="l00165"></a>00165 
<a name="l00166"></a>00166 <span class="keywordtype">void</span> 
<a name="l00167"></a><a class="code" href="buffer_8h.html#a8aad3e9f377019a428cfd92b0ef6d534">00167</a> <a class="code" href="buffer_8c.html#a8aad3e9f377019a428cfd92b0ef6d534" title="Copy contents of the other buffer to this buffer.">ldns_buffer_copy</a>(<a class="code" href="structldns__struct__buffer.html" title="implementation of buffers to ease operations">ldns_buffer</a>* result, <a class="code" href="structldns__struct__buffer.html" title="implementation of buffers to ease operations">ldns_buffer</a>* from)
<a name="l00168"></a>00168 {
<a name="l00169"></a>00169         <span class="keywordtype">size_t</span> tocopy = ldns_buffer_limit(from);
<a name="l00170"></a>00170 
<a name="l00171"></a>00171         <span class="keywordflow">if</span>(tocopy &gt; ldns_buffer_capacity(result))
<a name="l00172"></a>00172                 tocopy = ldns_buffer_capacity(result);
<a name="l00173"></a>00173         ldns_buffer_clear(result);
<a name="l00174"></a>00174         ldns_buffer_write(result, ldns_buffer_begin(from), tocopy);
<a name="l00175"></a>00175         ldns_buffer_flip(result);
<a name="l00176"></a>00176 }
</pre></div></div>
</div>
<hr class="footer"/><address class="footer"><small>Generated on Wed Jan 11 2012 for ldns by&#160;
<a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.7.4 </small></address>
</body>
</html>