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<div id="projectname">Leptonica <span id="projectnumber">1.68</span></div>
<div id="projectbrief">C Image Processing Library</div>
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<h1>bbuffer.c</h1> </div>
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<a href="bbuffer_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"> - Copyright (C) 2001 Leptonica. All rights reserved.</span>
<a name="l00003"></a>00003 <span class="comment"> - This software is distributed in the hope that it will be</span>
<a name="l00004"></a>00004 <span class="comment"> - useful, but with NO WARRANTY OF ANY KIND.</span>
<a name="l00005"></a>00005 <span class="comment"> - No author or distributor accepts responsibility to anyone for the</span>
<a name="l00006"></a>00006 <span class="comment"> - consequences of using this software, or for whether it serves any</span>
<a name="l00007"></a>00007 <span class="comment"> - particular purpose or works at all, unless he or she says so in</span>
<a name="l00008"></a>00008 <span class="comment"> - writing. Everyone is granted permission to copy, modify and</span>
<a name="l00009"></a>00009 <span class="comment"> - redistribute this source code, for commercial or non-commercial</span>
<a name="l00010"></a>00010 <span class="comment"> - purposes, with the following restrictions: (1) the origin of this</span>
<a name="l00011"></a>00011 <span class="comment"> - source code must not be misrepresented; (2) modified versions must</span>
<a name="l00012"></a>00012 <span class="comment"> - be plainly marked as such; and (3) this notice may not be removed</span>
<a name="l00013"></a>00013 <span class="comment"> - or altered from any source or modified source distribution.</span>
<a name="l00014"></a>00014 <span class="comment"> *====================================================================*/</span>
<a name="l00015"></a>00015
<a name="l00016"></a>00016 <span class="comment">/*</span>
<a name="l00017"></a>00017 <span class="comment"> * bbuffer.c</span>
<a name="l00018"></a>00018 <span class="comment"> *</span>
<a name="l00019"></a>00019 <span class="comment"> * Create/Destroy BBuffer</span>
<a name="l00020"></a>00020 <span class="comment"> * BBUFFER *bbufferCreate()</span>
<a name="l00021"></a>00021 <span class="comment"> * void *bbufferDestroy()</span>
<a name="l00022"></a>00022 <span class="comment"> * l_uint8 *bbufferDestroyAndSaveData()</span>
<a name="l00023"></a>00023 <span class="comment"> *</span>
<a name="l00024"></a>00024 <span class="comment"> * Operations to read data TO a BBuffer</span>
<a name="l00025"></a>00025 <span class="comment"> * l_int32 bbufferRead()</span>
<a name="l00026"></a>00026 <span class="comment"> * l_int32 bbufferReadStream()</span>
<a name="l00027"></a>00027 <span class="comment"> * l_int32 bbufferExtendArray()</span>
<a name="l00028"></a>00028 <span class="comment"> *</span>
<a name="l00029"></a>00029 <span class="comment"> * Operations to write data FROM a BBuffer</span>
<a name="l00030"></a>00030 <span class="comment"> * l_int32 bbufferWrite()</span>
<a name="l00031"></a>00031 <span class="comment"> * l_int32 bbufferWriteStream()</span>
<a name="l00032"></a>00032 <span class="comment"> *</span>
<a name="l00033"></a>00033 <span class="comment"> * Accessors</span>
<a name="l00034"></a>00034 <span class="comment"> * l_int32 bbufferBytesToWrite()</span>
<a name="l00035"></a>00035 <span class="comment"> *</span>
<a name="l00036"></a>00036 <span class="comment"> *</span>
<a name="l00037"></a>00037 <span class="comment"> * The bbuffer is an implementation of a byte queue.</span>
<a name="l00038"></a>00038 <span class="comment"> * The bbuffer holds a byte array from which bytes are</span>
<a name="l00039"></a>00039 <span class="comment"> * processed in a first-in/first-out fashion. As with</span>
<a name="l00040"></a>00040 <span class="comment"> * any queue, bbuffer maintains two "pointers," one to the</span>
<a name="l00041"></a>00041 <span class="comment"> * tail of the queue (where you read new bytes onto it)</span>
<a name="l00042"></a>00042 <span class="comment"> * and one to the head of the queue (where you start from</span>
<a name="l00043"></a>00043 <span class="comment"> * when writing bytes out of it. </span>
<a name="l00044"></a>00044 <span class="comment"> *</span>
<a name="l00045"></a>00045 <span class="comment"> * The queue can be visualized:</span>
<a name="l00046"></a>00046 <span class="comment"> *</span>
<a name="l00047"></a>00047 <span class="comment"> * </span>
<a name="l00048"></a>00048 <span class="comment"> * byte 0 byte (nalloc - 1)</span>
<a name="l00049"></a>00049 <span class="comment"> * | |</span>
<a name="l00050"></a>00050 <span class="comment"> * --------------------------------------------------</span>
<a name="l00051"></a>00051 <span class="comment"> * H T</span>
<a name="l00052"></a>00052 <span class="comment"> * [ aw ][ bytes currently on queue ][ anr ] </span>
<a name="l00053"></a>00053 <span class="comment"> * </span>
<a name="l00054"></a>00054 <span class="comment"> * ---: all allocated data in bbuffer</span>
<a name="l00055"></a>00055 <span class="comment"> * H: queue head (ptr to next byte to be written out)</span>
<a name="l00056"></a>00056 <span class="comment"> * T: queue tail (ptr to first byte to be written to) </span>
<a name="l00057"></a>00057 <span class="comment"> * aw: already written from queue</span>
<a name="l00058"></a>00058 <span class="comment"> * anr: allocated but not yet read to</span>
<a name="l00059"></a>00059 <span class="comment"> *</span>
<a name="l00060"></a>00060 <span class="comment"> * The purpose of bbuffer is to allow you to safely read</span>
<a name="l00061"></a>00061 <span class="comment"> * bytes in, and to sequentially write them out as well.</span>
<a name="l00062"></a>00062 <span class="comment"> * In the process of writing bytes out, you don't actually</span>
<a name="l00063"></a>00063 <span class="comment"> * remove the bytes in the array; you just move the pointer</span>
<a name="l00064"></a>00064 <span class="comment"> * (nwritten) which points to the head of the queue. In</span>
<a name="l00065"></a>00065 <span class="comment"> * the process of reading bytes in, you sometimes need to</span>
<a name="l00066"></a>00066 <span class="comment"> * expand the array size. If a read is performed after a</span>
<a name="l00067"></a>00067 <span class="comment"> * write, so that the head of the queue is not at the</span>
<a name="l00068"></a>00068 <span class="comment"> * beginning of the array, the bytes already written are</span>
<a name="l00069"></a>00069 <span class="comment"> * first removed by copying the others over them; then the</span>
<a name="l00070"></a>00070 <span class="comment"> * new bytes are read onto the tail of the queue.</span>
<a name="l00071"></a>00071 <span class="comment"> *</span>
<a name="l00072"></a>00072 <span class="comment"> * Note that the meaning of "read into" and "write from"</span>
<a name="l00073"></a>00073 <span class="comment"> * the bbuffer is OPPOSITE to that for a stream, where</span>
<a name="l00074"></a>00074 <span class="comment"> * you read "from" a stream and write "into" a stream.</span>
<a name="l00075"></a>00075 <span class="comment"> * As a mnemonic for remembering the direction:</span>
<a name="l00076"></a>00076 <span class="comment"> * - to read bytes from a stream into the bbuffer,</span>
<a name="l00077"></a>00077 <span class="comment"> * you call fread on the stream</span>
<a name="l00078"></a>00078 <span class="comment"> * - to write bytes from the bbuffer into a stream,</span>
<a name="l00079"></a>00079 <span class="comment"> * you call fwrite on the stream</span>
<a name="l00080"></a>00080 <span class="comment"> *</span>
<a name="l00081"></a>00081 <span class="comment"> * See zlibmem.c for an example use of bbuffer, where we</span>
<a name="l00082"></a>00082 <span class="comment"> * compress and decompress an array of bytes in memory.</span>
<a name="l00083"></a>00083 <span class="comment"> */</span>
<a name="l00084"></a>00084
<a name="l00085"></a>00085 <span class="preprocessor">#include <string.h></span>
<a name="l00086"></a>00086 <span class="preprocessor">#include "<a class="code" href="allheaders_8h.html" title="Includes all required Leptonica header files.">allheaders.h</a>"</span>
<a name="l00087"></a>00087
<a name="l00088"></a><a class="code" href="bbuffer_8c.html#a7eecbb1282d9f0c0b88d1a9c622da329">00088</a> <span class="keyword">static</span> <span class="keyword">const</span> <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a> <a class="code" href="bbuffer_8c.html#a7eecbb1282d9f0c0b88d1a9c622da329">INITIAL_BUFFER_ARRAYSIZE</a> = 1024; <span class="comment">/* n'importe quoi */</span>
<a name="l00089"></a>00089
<a name="l00090"></a>00090
<a name="l00091"></a>00091 <span class="comment">/*--------------------------------------------------------------------------*</span>
<a name="l00092"></a>00092 <span class="comment"> * BBuffer create/destroy *</span>
<a name="l00093"></a>00093 <span class="comment"> *--------------------------------------------------------------------------*/</span><span class="comment"></span>
<a name="l00094"></a>00094 <span class="comment">/*!</span>
<a name="l00095"></a>00095 <span class="comment"> * bbufferCreate()</span>
<a name="l00096"></a>00096 <span class="comment"> *</span>
<a name="l00097"></a>00097 <span class="comment"> * Input: buffer address in memory (<optional>)</span>
<a name="l00098"></a>00098 <span class="comment"> * size of byte array to be alloc'd (0 for default)</span>
<a name="l00099"></a>00099 <span class="comment"> * Return: bbuffer, or null on error</span>
<a name="l00100"></a>00100 <span class="comment"> *</span>
<a name="l00101"></a>00101 <span class="comment"> * Notes:</span>
<a name="l00102"></a>00102 <span class="comment"> * (1) If a buffer address is given, you should read all the data in.</span>
<a name="l00103"></a>00103 <span class="comment"> * (2) Allocates a bbuffer with associated byte array of</span>
<a name="l00104"></a>00104 <span class="comment"> * the given size. If a buffer address is given,</span>
<a name="l00105"></a>00105 <span class="comment"> * it then reads the number of bytes into the byte array.</span>
<a name="l00106"></a>00106 <span class="comment"> */</span>
<a name="l00107"></a>00107 <a class="code" href="struct_byte_buffer.html">BBUFFER</a> *
<a name="l00108"></a><a class="code" href="leptprotos_8h.html#a266ec741866c7c85fc87bed739d00c23">00108</a> <a class="code" href="bbuffer_8c.html#af2e89a620293df2b2d182fa75f7d68f5">bbufferCreate</a>(<a class="code" href="environ_8h.html#a7ed60554e7d6dd89aca643189b1e70ad">l_uint8</a> *indata,
<a name="l00109"></a>00109 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a> <a class="code" href="struct_l___bytea.html#a9f1f92d1fd9e5dd7e9e823e4a7b29738">nalloc</a>)
<a name="l00110"></a>00110 {
<a name="l00111"></a>00111 <a class="code" href="struct_byte_buffer.html">BBUFFER</a> *bb;
<a name="l00112"></a>00112
<a name="l00113"></a>00113 <a class="code" href="environ_8h.html#a1a16952819bcbc526c998e3ac86f2e78">PROCNAME</a>(<span class="stringliteral">"bbufferCreate"</span>);
<a name="l00114"></a>00114
<a name="l00115"></a>00115 <span class="keywordflow">if</span> (nalloc <= 0)
<a name="l00116"></a>00116 nalloc = <a class="code" href="bbuffer_8c.html#a7eecbb1282d9f0c0b88d1a9c622da329">INITIAL_BUFFER_ARRAYSIZE</a>;
<a name="l00117"></a>00117
<a name="l00118"></a>00118 <span class="keywordflow">if</span> ((bb = (<a class="code" href="struct_byte_buffer.html">BBUFFER</a> *)<a class="code" href="environ_8h.html#abc24891c647be0bd23e233d013175da0">CALLOC</a>(1, <span class="keyword">sizeof</span>(<a class="code" href="struct_byte_buffer.html">BBUFFER</a>))) == <a class="code" href="environ_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>)
<a name="l00119"></a>00119 <span class="keywordflow">return</span> (<a class="code" href="struct_byte_buffer.html">BBUFFER</a> *)<a class="code" href="environ_8h.html#a38a8310a83847948c9ce6620983be468">ERROR_PTR</a>(<span class="stringliteral">"bb not made"</span>, procName, <a class="code" href="environ_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>);
<a name="l00120"></a>00120 <span class="keywordflow">if</span> ((bb-><a class="code" href="struct_byte_buffer.html#ad7570422e25577fe63f29c8db2b466c3">array</a> = (<a class="code" href="environ_8h.html#a7ed60554e7d6dd89aca643189b1e70ad">l_uint8</a> *)<a class="code" href="environ_8h.html#abc24891c647be0bd23e233d013175da0">CALLOC</a>(nalloc, <span class="keyword">sizeof</span>(<a class="code" href="environ_8h.html#a7ed60554e7d6dd89aca643189b1e70ad">l_uint8</a>))) == <a class="code" href="environ_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>)
<a name="l00121"></a>00121 <span class="keywordflow">return</span> (<a class="code" href="struct_byte_buffer.html">BBUFFER</a> *)<a class="code" href="environ_8h.html#a38a8310a83847948c9ce6620983be468">ERROR_PTR</a>(<span class="stringliteral">"byte array not made"</span>, procName, <a class="code" href="environ_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>);
<a name="l00122"></a>00122 bb-><a class="code" href="struct_byte_buffer.html#a6d5288b55b27e779a64d9baa22551f9c">nalloc</a> = <a class="code" href="struct_l___bytea.html#a9f1f92d1fd9e5dd7e9e823e4a7b29738">nalloc</a>;
<a name="l00123"></a>00123 bb-><a class="code" href="struct_byte_buffer.html#a208966bb31d3b30c011a730713760898">nwritten</a> = 0;
<a name="l00124"></a>00124
<a name="l00125"></a>00125 <span class="keywordflow">if</span> (indata) {
<a name="l00126"></a>00126 memcpy((<a class="code" href="environ_8h.html#a7ed60554e7d6dd89aca643189b1e70ad">l_uint8</a> *)bb-><a class="code" href="struct_byte_buffer.html#ad7570422e25577fe63f29c8db2b466c3">array</a>, indata, nalloc);
<a name="l00127"></a>00127 bb-><a class="code" href="struct_byte_buffer.html#a8863999998fc6faf17da4aa516889c53">n</a> = <a class="code" href="struct_l___bytea.html#a9f1f92d1fd9e5dd7e9e823e4a7b29738">nalloc</a>;
<a name="l00128"></a>00128 }
<a name="l00129"></a>00129 <span class="keywordflow">else</span>
<a name="l00130"></a>00130 bb-><a class="code" href="struct_byte_buffer.html#a8863999998fc6faf17da4aa516889c53">n</a> = 0;
<a name="l00131"></a>00131
<a name="l00132"></a>00132 <span class="keywordflow">return</span> bb;
<a name="l00133"></a>00133 }
<a name="l00134"></a>00134
<a name="l00135"></a>00135 <span class="comment"></span>
<a name="l00136"></a>00136 <span class="comment">/*!</span>
<a name="l00137"></a>00137 <span class="comment"> * bbufferDestroy()</span>
<a name="l00138"></a>00138 <span class="comment"> *</span>
<a name="l00139"></a>00139 <span class="comment"> * Input: &bbuffer (<to be nulled>)</span>
<a name="l00140"></a>00140 <span class="comment"> * Return: void</span>
<a name="l00141"></a>00141 <span class="comment"> *</span>
<a name="l00142"></a>00142 <span class="comment"> * Notes:</span>
<a name="l00143"></a>00143 <span class="comment"> * (1) Destroys the byte array in the bbuffer and then the bbuffer;</span>
<a name="l00144"></a>00144 <span class="comment"> * then nulls the contents of the input ptr.</span>
<a name="l00145"></a>00145 <span class="comment"> */</span>
<a name="l00146"></a>00146 <span class="keywordtype">void</span>
<a name="l00147"></a><a class="code" href="leptprotos_8h.html#af31228fb7232dba60d0f5daf6e049a86">00147</a> <a class="code" href="bbuffer_8c.html#aaa4b7610490a5f9315caf8ca4ce4b6f7">bbufferDestroy</a>(<a class="code" href="struct_byte_buffer.html">BBUFFER</a> **pbb)
<a name="l00148"></a>00148 {
<a name="l00149"></a>00149 <a class="code" href="struct_byte_buffer.html">BBUFFER</a> *bb;
<a name="l00150"></a>00150
<a name="l00151"></a>00151 <a class="code" href="environ_8h.html#a1a16952819bcbc526c998e3ac86f2e78">PROCNAME</a>(<span class="stringliteral">"bbufferDestroy"</span>);
<a name="l00152"></a>00152
<a name="l00153"></a>00153 <span class="keywordflow">if</span> (pbb == <a class="code" href="environ_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {
<a name="l00154"></a>00154 <a class="code" href="environ_8h.html#a80ea4add6888dc55f0f6af9c488f1f21">L_WARNING</a>(<span class="stringliteral">"ptr address is NULL"</span>, procName);
<a name="l00155"></a>00155 <span class="keywordflow">return</span>;
<a name="l00156"></a>00156 }
<a name="l00157"></a>00157
<a name="l00158"></a>00158 <span class="keywordflow">if</span> ((bb = *pbb) == <a class="code" href="environ_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>)
<a name="l00159"></a>00159 <span class="keywordflow">return</span>;
<a name="l00160"></a>00160
<a name="l00161"></a>00161 <span class="keywordflow">if</span> (bb-><a class="code" href="struct_byte_buffer.html#ad7570422e25577fe63f29c8db2b466c3">array</a>)
<a name="l00162"></a>00162 <a class="code" href="environ_8h.html#a105949c59c998e38aad80266afac92bf">FREE</a>(bb-><a class="code" href="struct_byte_buffer.html#ad7570422e25577fe63f29c8db2b466c3">array</a>);
<a name="l00163"></a>00163 <a class="code" href="environ_8h.html#a105949c59c998e38aad80266afac92bf">FREE</a>(bb);
<a name="l00164"></a>00164 *pbb = <a class="code" href="environ_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;
<a name="l00165"></a>00165
<a name="l00166"></a>00166 <span class="keywordflow">return</span>;
<a name="l00167"></a>00167 }
<a name="l00168"></a>00168
<a name="l00169"></a>00169 <span class="comment"></span>
<a name="l00170"></a>00170 <span class="comment">/*!</span>
<a name="l00171"></a>00171 <span class="comment"> * bbufferDestroyAndSaveData()</span>
<a name="l00172"></a>00172 <span class="comment"> *</span>
<a name="l00173"></a>00173 <span class="comment"> * Input: &bbuffer (<to be nulled>)</span>
<a name="l00174"></a>00174 <span class="comment"> * &nbytes (<return> number of bytes saved in array)</span>
<a name="l00175"></a>00175 <span class="comment"> * Return: barray (newly allocated array of data)</span>
<a name="l00176"></a>00176 <span class="comment"> *</span>
<a name="l00177"></a>00177 <span class="comment"> * Notes:</span>
<a name="l00178"></a>00178 <span class="comment"> * (1) Copies data to newly allocated array; then destroys the bbuffer.</span>
<a name="l00179"></a>00179 <span class="comment"> */</span>
<a name="l00180"></a>00180 <a class="code" href="environ_8h.html#a7ed60554e7d6dd89aca643189b1e70ad">l_uint8</a> *
<a name="l00181"></a><a class="code" href="leptprotos_8h.html#a1d265b4fc864a26453f6445b1702e444">00181</a> <a class="code" href="bbuffer_8c.html#a82e32394162f7ffa65232b4b8e0ecbc6">bbufferDestroyAndSaveData</a>(<a class="code" href="struct_byte_buffer.html">BBUFFER</a> **pbb,
<a name="l00182"></a>00182 <span class="keywordtype">size_t</span> *pnbytes)
<a name="l00183"></a>00183 {
<a name="l00184"></a>00184 <a class="code" href="environ_8h.html#a7ed60554e7d6dd89aca643189b1e70ad">l_uint8</a> *array;
<a name="l00185"></a>00185 <span class="keywordtype">size_t</span> nbytes;
<a name="l00186"></a>00186 <a class="code" href="struct_byte_buffer.html">BBUFFER</a> *bb;
<a name="l00187"></a>00187
<a name="l00188"></a>00188 <a class="code" href="environ_8h.html#a1a16952819bcbc526c998e3ac86f2e78">PROCNAME</a>(<span class="stringliteral">"bbufferDestroyAndSaveData"</span>);
<a name="l00189"></a>00189
<a name="l00190"></a>00190 <span class="keywordflow">if</span> (pbb == <a class="code" href="environ_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {
<a name="l00191"></a>00191 <a class="code" href="environ_8h.html#a80ea4add6888dc55f0f6af9c488f1f21">L_WARNING</a>(<span class="stringliteral">"ptr address is NULL"</span>, procName);
<a name="l00192"></a>00192 <span class="keywordflow">return</span> <a class="code" href="environ_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;
<a name="l00193"></a>00193 }
<a name="l00194"></a>00194 <span class="keywordflow">if</span> (pnbytes == <a class="code" href="environ_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {
<a name="l00195"></a>00195 <a class="code" href="environ_8h.html#a80ea4add6888dc55f0f6af9c488f1f21">L_WARNING</a>(<span class="stringliteral">"&nbytes is NULL"</span>, procName);
<a name="l00196"></a>00196 <a class="code" href="bbuffer_8c.html#aaa4b7610490a5f9315caf8ca4ce4b6f7">bbufferDestroy</a>(pbb);
<a name="l00197"></a>00197 <span class="keywordflow">return</span> <a class="code" href="environ_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;
<a name="l00198"></a>00198 }
<a name="l00199"></a>00199
<a name="l00200"></a>00200 <span class="keywordflow">if</span> ((bb = *pbb) == <a class="code" href="environ_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>)
<a name="l00201"></a>00201 <span class="keywordflow">return</span> <a class="code" href="environ_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;
<a name="l00202"></a>00202
<a name="l00203"></a>00203 <span class="comment">/* write all unwritten bytes out to a new array */</span>
<a name="l00204"></a>00204 nbytes = bb-><a class="code" href="struct_byte_buffer.html#a8863999998fc6faf17da4aa516889c53">n</a> - bb-><a class="code" href="struct_byte_buffer.html#a208966bb31d3b30c011a730713760898">nwritten</a>;
<a name="l00205"></a>00205 *pnbytes = nbytes;
<a name="l00206"></a>00206 <span class="keywordflow">if</span> ((array = (<a class="code" href="environ_8h.html#a7ed60554e7d6dd89aca643189b1e70ad">l_uint8</a> *)<a class="code" href="environ_8h.html#abc24891c647be0bd23e233d013175da0">CALLOC</a>(nbytes, <span class="keyword">sizeof</span>(<a class="code" href="environ_8h.html#a7ed60554e7d6dd89aca643189b1e70ad">l_uint8</a>))) == <a class="code" href="environ_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>) {
<a name="l00207"></a>00207 <a class="code" href="environ_8h.html#a80ea4add6888dc55f0f6af9c488f1f21">L_WARNING</a>(<span class="stringliteral">"calloc failure for array"</span>, procName);
<a name="l00208"></a>00208 <span class="keywordflow">return</span> <a class="code" href="environ_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;
<a name="l00209"></a>00209 }
<a name="l00210"></a>00210 memcpy((<span class="keywordtype">void</span> *)array, (<span class="keywordtype">void</span> *)(bb-><a class="code" href="struct_byte_buffer.html#ad7570422e25577fe63f29c8db2b466c3">array</a> + bb-><a class="code" href="struct_byte_buffer.html#a208966bb31d3b30c011a730713760898">nwritten</a>), nbytes);
<a name="l00211"></a>00211
<a name="l00212"></a>00212 <a class="code" href="bbuffer_8c.html#aaa4b7610490a5f9315caf8ca4ce4b6f7">bbufferDestroy</a>(pbb);
<a name="l00213"></a>00213 <span class="keywordflow">return</span> array;
<a name="l00214"></a>00214 }
<a name="l00215"></a>00215
<a name="l00216"></a>00216
<a name="l00217"></a>00217
<a name="l00218"></a>00218 <span class="comment">/*--------------------------------------------------------------------------*</span>
<a name="l00219"></a>00219 <span class="comment"> * Operations to read data INTO a BBuffer *</span>
<a name="l00220"></a>00220 <span class="comment"> *--------------------------------------------------------------------------*/</span><span class="comment"></span>
<a name="l00221"></a>00221 <span class="comment">/*!</span>
<a name="l00222"></a>00222 <span class="comment"> * bbufferRead()</span>
<a name="l00223"></a>00223 <span class="comment"> *</span>
<a name="l00224"></a>00224 <span class="comment"> * Input: bbuffer</span>
<a name="l00225"></a>00225 <span class="comment"> * src (source memory buffer from which bytes are read)</span>
<a name="l00226"></a>00226 <span class="comment"> * nbytes (bytes to be read)</span>
<a name="l00227"></a>00227 <span class="comment"> * Return: 0 if OK, 1 on error</span>
<a name="l00228"></a>00228 <span class="comment"> *</span>
<a name="l00229"></a>00229 <span class="comment"> * Notes:</span>
<a name="l00230"></a>00230 <span class="comment"> * (1) For a read after write, first remove the written</span>
<a name="l00231"></a>00231 <span class="comment"> * bytes by shifting the unwritten bytes in the array,</span>
<a name="l00232"></a>00232 <span class="comment"> * then check if there is enough room to add the new bytes.</span>
<a name="l00233"></a>00233 <span class="comment"> * If not, realloc with bbufferExpandArray(), resulting</span>
<a name="l00234"></a>00234 <span class="comment"> * in a second writing of the unwritten bytes. While less</span>
<a name="l00235"></a>00235 <span class="comment"> * efficient, this is simpler than making a special case</span>
<a name="l00236"></a>00236 <span class="comment"> * of reallocNew().</span>
<a name="l00237"></a>00237 <span class="comment"> */</span>
<a name="l00238"></a>00238 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a>
<a name="l00239"></a><a class="code" href="leptprotos_8h.html#aecb53b85b7a24f61bfe0bb861bf98999">00239</a> <a class="code" href="bbuffer_8c.html#a5f36de071cd460f68c599a1232e997c4">bbufferRead</a>(<a class="code" href="struct_byte_buffer.html">BBUFFER</a> *bb,
<a name="l00240"></a>00240 <a class="code" href="environ_8h.html#a7ed60554e7d6dd89aca643189b1e70ad">l_uint8</a> *src,
<a name="l00241"></a>00241 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a> nbytes)
<a name="l00242"></a>00242 {
<a name="l00243"></a>00243 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a> navail, nadd, nwritten;
<a name="l00244"></a>00244
<a name="l00245"></a>00245 <a class="code" href="environ_8h.html#a1a16952819bcbc526c998e3ac86f2e78">PROCNAME</a>(<span class="stringliteral">"bbufferRead"</span>);
<a name="l00246"></a>00246
<a name="l00247"></a>00247 <span class="keywordflow">if</span> (!bb)
<a name="l00248"></a>00248 <span class="keywordflow">return</span> <a class="code" href="environ_8h.html#a8b17fe871312c2e1613fa694bb78a963">ERROR_INT</a>(<span class="stringliteral">"bb not defined"</span>, procName, 1);
<a name="l00249"></a>00249 <span class="keywordflow">if</span> (!src)
<a name="l00250"></a>00250 <span class="keywordflow">return</span> <a class="code" href="environ_8h.html#a8b17fe871312c2e1613fa694bb78a963">ERROR_INT</a>(<span class="stringliteral">"src not defined"</span>, procName, 1);
<a name="l00251"></a>00251 <span class="keywordflow">if</span> (nbytes == 0)
<a name="l00252"></a>00252 <span class="keywordflow">return</span> <a class="code" href="environ_8h.html#a8b17fe871312c2e1613fa694bb78a963">ERROR_INT</a>(<span class="stringliteral">"no bytes to read"</span>, procName, 1);
<a name="l00253"></a>00253
<a name="l00254"></a>00254 <span class="keywordflow">if</span> ((nwritten = bb-><a class="code" href="struct_byte_buffer.html#a208966bb31d3b30c011a730713760898">nwritten</a>)) { <span class="comment">/* move the unwritten bytes over */</span>
<a name="l00255"></a>00255 memmove((<a class="code" href="environ_8h.html#a7ed60554e7d6dd89aca643189b1e70ad">l_uint8</a> *)bb-><a class="code" href="struct_byte_buffer.html#ad7570422e25577fe63f29c8db2b466c3">array</a>, (<a class="code" href="environ_8h.html#a7ed60554e7d6dd89aca643189b1e70ad">l_uint8</a> *)(bb-><a class="code" href="struct_byte_buffer.html#ad7570422e25577fe63f29c8db2b466c3">array</a> + nwritten),
<a name="l00256"></a>00256 bb-><a class="code" href="struct_byte_buffer.html#a8863999998fc6faf17da4aa516889c53">n</a> - nwritten);
<a name="l00257"></a>00257 bb-><a class="code" href="struct_byte_buffer.html#a208966bb31d3b30c011a730713760898">nwritten</a> = 0;
<a name="l00258"></a>00258 bb-><a class="code" href="struct_byte_buffer.html#a8863999998fc6faf17da4aa516889c53">n</a> -= nwritten;
<a name="l00259"></a>00259 }
<a name="l00260"></a>00260
<a name="l00261"></a>00261 <span class="comment">/* If necessary, expand the allocated array. Do so by</span>
<a name="l00262"></a>00262 <span class="comment"> * by at least a factor of two. */</span>
<a name="l00263"></a>00263 navail = bb-><a class="code" href="struct_byte_buffer.html#a6d5288b55b27e779a64d9baa22551f9c">nalloc</a> - bb-><a class="code" href="struct_byte_buffer.html#a8863999998fc6faf17da4aa516889c53">n</a>;
<a name="l00264"></a>00264 <span class="keywordflow">if</span> (nbytes > navail) {
<a name="l00265"></a>00265 nadd = <a class="code" href="environ_8h.html#a806d5df14d476263788e0a67d3615b4d">L_MAX</a>(bb-><a class="code" href="struct_byte_buffer.html#a6d5288b55b27e779a64d9baa22551f9c">nalloc</a>, nbytes);
<a name="l00266"></a>00266 <a class="code" href="bbuffer_8c.html#a382d8bdb02b233891a4ca66c324932bd">bbufferExtendArray</a>(bb, nadd);
<a name="l00267"></a>00267 }
<a name="l00268"></a>00268
<a name="l00269"></a>00269 <span class="comment">/* Read in the new bytes */</span>
<a name="l00270"></a>00270 memcpy((<a class="code" href="environ_8h.html#a7ed60554e7d6dd89aca643189b1e70ad">l_uint8</a> *)(bb-><a class="code" href="struct_byte_buffer.html#ad7570422e25577fe63f29c8db2b466c3">array</a> + bb-><a class="code" href="struct_byte_buffer.html#a8863999998fc6faf17da4aa516889c53">n</a>), src, nbytes);
<a name="l00271"></a>00271 bb-><a class="code" href="struct_byte_buffer.html#a8863999998fc6faf17da4aa516889c53">n</a> += nbytes;
<a name="l00272"></a>00272
<a name="l00273"></a>00273 <span class="keywordflow">return</span> 0;
<a name="l00274"></a>00274 }
<a name="l00275"></a>00275
<a name="l00276"></a>00276 <span class="comment"></span>
<a name="l00277"></a>00277 <span class="comment">/*!</span>
<a name="l00278"></a>00278 <span class="comment"> * bbufferReadStream()</span>
<a name="l00279"></a>00279 <span class="comment"> *</span>
<a name="l00280"></a>00280 <span class="comment"> * Input: bbuffer</span>
<a name="l00281"></a>00281 <span class="comment"> * fp (source stream from which bytes are read)</span>
<a name="l00282"></a>00282 <span class="comment"> * nbytes (bytes to be read)</span>
<a name="l00283"></a>00283 <span class="comment"> * Return: 0 if OK, 1 on error</span>
<a name="l00284"></a>00284 <span class="comment"> */</span>
<a name="l00285"></a>00285 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a>
<a name="l00286"></a><a class="code" href="leptprotos_8h.html#acfab0befaca6b3195fb4b3d868498aca">00286</a> <a class="code" href="bbuffer_8c.html#a53ce8438f552001a98c63b70095daad4">bbufferReadStream</a>(<a class="code" href="struct_byte_buffer.html">BBUFFER</a> *bb,
<a name="l00287"></a>00287 FILE *fp,
<a name="l00288"></a>00288 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a> nbytes)
<a name="l00289"></a>00289 {
<a name="l00290"></a>00290 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a> navail, nadd, nread, nwritten;
<a name="l00291"></a>00291
<a name="l00292"></a>00292 <a class="code" href="environ_8h.html#a1a16952819bcbc526c998e3ac86f2e78">PROCNAME</a>(<span class="stringliteral">"bbufferReadStream"</span>);
<a name="l00293"></a>00293
<a name="l00294"></a>00294 <span class="keywordflow">if</span> (!bb)
<a name="l00295"></a>00295 <span class="keywordflow">return</span> <a class="code" href="environ_8h.html#a8b17fe871312c2e1613fa694bb78a963">ERROR_INT</a>(<span class="stringliteral">"bb not defined"</span>, procName, 1);
<a name="l00296"></a>00296 <span class="keywordflow">if</span> (!fp)
<a name="l00297"></a>00297 <span class="keywordflow">return</span> <a class="code" href="environ_8h.html#a8b17fe871312c2e1613fa694bb78a963">ERROR_INT</a>(<span class="stringliteral">"fp not defined"</span>, procName, 1);
<a name="l00298"></a>00298 <span class="keywordflow">if</span> (nbytes == 0)
<a name="l00299"></a>00299 <span class="keywordflow">return</span> <a class="code" href="environ_8h.html#a8b17fe871312c2e1613fa694bb78a963">ERROR_INT</a>(<span class="stringliteral">"no bytes to read"</span>, procName, 1);
<a name="l00300"></a>00300
<a name="l00301"></a>00301 <span class="keywordflow">if</span> ((nwritten = bb-><a class="code" href="struct_byte_buffer.html#a208966bb31d3b30c011a730713760898">nwritten</a>)) { <span class="comment">/* move any unwritten bytes over */</span>
<a name="l00302"></a>00302 memmove((<a class="code" href="environ_8h.html#a7ed60554e7d6dd89aca643189b1e70ad">l_uint8</a> *)bb-><a class="code" href="struct_byte_buffer.html#ad7570422e25577fe63f29c8db2b466c3">array</a>, (<a class="code" href="environ_8h.html#a7ed60554e7d6dd89aca643189b1e70ad">l_uint8</a> *)(bb-><a class="code" href="struct_byte_buffer.html#ad7570422e25577fe63f29c8db2b466c3">array</a> + nwritten),
<a name="l00303"></a>00303 bb-><a class="code" href="struct_byte_buffer.html#a8863999998fc6faf17da4aa516889c53">n</a> - nwritten);
<a name="l00304"></a>00304 bb-><a class="code" href="struct_byte_buffer.html#a208966bb31d3b30c011a730713760898">nwritten</a> = 0;
<a name="l00305"></a>00305 bb-><a class="code" href="struct_byte_buffer.html#a8863999998fc6faf17da4aa516889c53">n</a> -= nwritten;
<a name="l00306"></a>00306 }
<a name="l00307"></a>00307
<a name="l00308"></a>00308 <span class="comment">/* If necessary, expand the allocated array. Do so by</span>
<a name="l00309"></a>00309 <span class="comment"> * by at least a factor of two. */</span>
<a name="l00310"></a>00310 navail = bb-><a class="code" href="struct_byte_buffer.html#a6d5288b55b27e779a64d9baa22551f9c">nalloc</a> - bb-><a class="code" href="struct_byte_buffer.html#a8863999998fc6faf17da4aa516889c53">n</a>;
<a name="l00311"></a>00311 <span class="keywordflow">if</span> (nbytes > navail) {
<a name="l00312"></a>00312 nadd = <a class="code" href="environ_8h.html#a806d5df14d476263788e0a67d3615b4d">L_MAX</a>(bb-><a class="code" href="struct_byte_buffer.html#a6d5288b55b27e779a64d9baa22551f9c">nalloc</a>, nbytes);
<a name="l00313"></a>00313 <a class="code" href="bbuffer_8c.html#a382d8bdb02b233891a4ca66c324932bd">bbufferExtendArray</a>(bb, nadd);
<a name="l00314"></a>00314 }
<a name="l00315"></a>00315
<a name="l00316"></a>00316 <span class="comment">/* Read in the new bytes */</span>
<a name="l00317"></a>00317 nread = fread((<span class="keywordtype">void</span> *)(bb-><a class="code" href="struct_byte_buffer.html#ad7570422e25577fe63f29c8db2b466c3">array</a> + bb-><a class="code" href="struct_byte_buffer.html#a8863999998fc6faf17da4aa516889c53">n</a>), 1, nbytes, fp);
<a name="l00318"></a>00318 bb-><a class="code" href="struct_byte_buffer.html#a8863999998fc6faf17da4aa516889c53">n</a> += nread;
<a name="l00319"></a>00319
<a name="l00320"></a>00320 <span class="keywordflow">return</span> 0;
<a name="l00321"></a>00321 }
<a name="l00322"></a>00322
<a name="l00323"></a>00323 <span class="comment"></span>
<a name="l00324"></a>00324 <span class="comment">/*!</span>
<a name="l00325"></a>00325 <span class="comment"> * bbufferExtendArray()</span>
<a name="l00326"></a>00326 <span class="comment"> *</span>
<a name="l00327"></a>00327 <span class="comment"> * Input: bbuffer</span>
<a name="l00328"></a>00328 <span class="comment"> * nbytes (number of bytes to extend array size)</span>
<a name="l00329"></a>00329 <span class="comment"> * Return: 0 if OK, 1 on error</span>
<a name="l00330"></a>00330 <span class="comment"> *</span>
<a name="l00331"></a>00331 <span class="comment"> * Notes:</span>
<a name="l00332"></a>00332 <span class="comment"> * (1) reallocNew() copies all bb->nalloc bytes, even though</span>
<a name="l00333"></a>00333 <span class="comment"> * only bb->n are data.</span>
<a name="l00334"></a>00334 <span class="comment"> */</span>
<a name="l00335"></a>00335 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a>
<a name="l00336"></a><a class="code" href="leptprotos_8h.html#a4deb09998753bbbf8338fbe818cf432b">00336</a> <a class="code" href="bbuffer_8c.html#a382d8bdb02b233891a4ca66c324932bd">bbufferExtendArray</a>(<a class="code" href="struct_byte_buffer.html">BBUFFER</a> *bb,
<a name="l00337"></a>00337 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a> nbytes)
<a name="l00338"></a>00338 {
<a name="l00339"></a>00339 <a class="code" href="environ_8h.html#a1a16952819bcbc526c998e3ac86f2e78">PROCNAME</a>(<span class="stringliteral">"bbufferExtendArray"</span>);
<a name="l00340"></a>00340
<a name="l00341"></a>00341 <span class="keywordflow">if</span> (!bb)
<a name="l00342"></a>00342 <span class="keywordflow">return</span> <a class="code" href="environ_8h.html#a8b17fe871312c2e1613fa694bb78a963">ERROR_INT</a>(<span class="stringliteral">"bb not defined"</span>, procName, 1);
<a name="l00343"></a>00343
<a name="l00344"></a>00344 <span class="keywordflow">if</span> ((bb-><a class="code" href="struct_byte_buffer.html#ad7570422e25577fe63f29c8db2b466c3">array</a> = (<a class="code" href="environ_8h.html#a7ed60554e7d6dd89aca643189b1e70ad">l_uint8</a> *)<a class="code" href="leptprotos_8h.html#abe8bc34cbaea6831e51796aa917a8471">reallocNew</a>((<span class="keywordtype">void</span> **)&bb-><a class="code" href="struct_byte_buffer.html#ad7570422e25577fe63f29c8db2b466c3">array</a>,
<a name="l00345"></a>00345 bb-><a class="code" href="struct_byte_buffer.html#a6d5288b55b27e779a64d9baa22551f9c">nalloc</a>,
<a name="l00346"></a>00346 bb-><a class="code" href="struct_byte_buffer.html#a6d5288b55b27e779a64d9baa22551f9c">nalloc</a> + nbytes)) == <a class="code" href="environ_8h.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>)
<a name="l00347"></a>00347 <span class="keywordflow">return</span> <a class="code" href="environ_8h.html#a8b17fe871312c2e1613fa694bb78a963">ERROR_INT</a>(<span class="stringliteral">"new ptr array not returned"</span>, procName, 1);
<a name="l00348"></a>00348
<a name="l00349"></a>00349 bb-><a class="code" href="struct_byte_buffer.html#a6d5288b55b27e779a64d9baa22551f9c">nalloc</a> += nbytes;
<a name="l00350"></a>00350 <span class="keywordflow">return</span> 0;
<a name="l00351"></a>00351 }
<a name="l00352"></a>00352
<a name="l00353"></a>00353
<a name="l00354"></a>00354
<a name="l00355"></a>00355 <span class="comment">/*--------------------------------------------------------------------------*</span>
<a name="l00356"></a>00356 <span class="comment"> * Operations to write data FROM a BBuffer *</span>
<a name="l00357"></a>00357 <span class="comment"> *--------------------------------------------------------------------------*/</span><span class="comment"></span>
<a name="l00358"></a>00358 <span class="comment">/*!</span>
<a name="l00359"></a>00359 <span class="comment"> * bbufferWrite()</span>
<a name="l00360"></a>00360 <span class="comment"> *</span>
<a name="l00361"></a>00361 <span class="comment"> * Input: bbuffer</span>
<a name="l00362"></a>00362 <span class="comment"> * dest (dest memory buffer to which bytes are written)</span>
<a name="l00363"></a>00363 <span class="comment"> * nbytes (bytes requested to be written)</span>
<a name="l00364"></a>00364 <span class="comment"> * &nout (<return> bytes actually written)</span>
<a name="l00365"></a>00365 <span class="comment"> * Return: 0 if OK, 1 on error</span>
<a name="l00366"></a>00366 <span class="comment"> */</span>
<a name="l00367"></a>00367 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a>
<a name="l00368"></a><a class="code" href="leptprotos_8h.html#adc578eab2a001cc465a36322a0c90bce">00368</a> <a class="code" href="bbuffer_8c.html#a895afbf5ccdf4dceb379a53ae21304be">bbufferWrite</a>(<a class="code" href="struct_byte_buffer.html">BBUFFER</a> *bb,
<a name="l00369"></a>00369 <a class="code" href="environ_8h.html#a7ed60554e7d6dd89aca643189b1e70ad">l_uint8</a> *dest,
<a name="l00370"></a>00370 <span class="keywordtype">size_t</span> nbytes,
<a name="l00371"></a>00371 <span class="keywordtype">size_t</span> *pnout)
<a name="l00372"></a>00372 {
<a name="l00373"></a>00373 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a> nleft, nout;
<a name="l00374"></a>00374
<a name="l00375"></a>00375 <a class="code" href="environ_8h.html#a1a16952819bcbc526c998e3ac86f2e78">PROCNAME</a>(<span class="stringliteral">"bbufferWrite"</span>);
<a name="l00376"></a>00376
<a name="l00377"></a>00377 <span class="keywordflow">if</span> (!bb)
<a name="l00378"></a>00378 <span class="keywordflow">return</span> <a class="code" href="environ_8h.html#a8b17fe871312c2e1613fa694bb78a963">ERROR_INT</a>(<span class="stringliteral">"bb not defined"</span>, procName, 1);
<a name="l00379"></a>00379 <span class="keywordflow">if</span> (!dest)
<a name="l00380"></a>00380 <span class="keywordflow">return</span> <a class="code" href="environ_8h.html#a8b17fe871312c2e1613fa694bb78a963">ERROR_INT</a>(<span class="stringliteral">"dest not defined"</span>, procName, 1);
<a name="l00381"></a>00381 <span class="keywordflow">if</span> (nbytes <= 0)
<a name="l00382"></a>00382 <span class="keywordflow">return</span> <a class="code" href="environ_8h.html#a8b17fe871312c2e1613fa694bb78a963">ERROR_INT</a>(<span class="stringliteral">"no bytes requested to write"</span>, procName, 1);
<a name="l00383"></a>00383 <span class="keywordflow">if</span> (!pnout)
<a name="l00384"></a>00384 <span class="keywordflow">return</span> <a class="code" href="environ_8h.html#a8b17fe871312c2e1613fa694bb78a963">ERROR_INT</a>(<span class="stringliteral">"&nout not defined"</span>, procName, 1);
<a name="l00385"></a>00385
<a name="l00386"></a>00386 nleft = bb-><a class="code" href="struct_byte_buffer.html#a8863999998fc6faf17da4aa516889c53">n</a> - bb-><a class="code" href="struct_byte_buffer.html#a208966bb31d3b30c011a730713760898">nwritten</a>;
<a name="l00387"></a>00387 nout = <a class="code" href="environ_8h.html#a67d588ee5ca71be19990efb07fa2ce72">L_MIN</a>(nleft, nbytes);
<a name="l00388"></a>00388 *pnout = nout;
<a name="l00389"></a>00389
<a name="l00390"></a>00390 <span class="keywordflow">if</span> (nleft == 0) { <span class="comment">/* nothing to write; reinitialize the buffer */</span>
<a name="l00391"></a>00391 bb-><a class="code" href="struct_byte_buffer.html#a8863999998fc6faf17da4aa516889c53">n</a> = 0;
<a name="l00392"></a>00392 bb-><a class="code" href="struct_byte_buffer.html#a208966bb31d3b30c011a730713760898">nwritten</a> = 0;
<a name="l00393"></a>00393 <span class="keywordflow">return</span> 0;
<a name="l00394"></a>00394 }
<a name="l00395"></a>00395
<a name="l00396"></a>00396 <span class="comment">/* nout > 0; transfer the data out */</span>
<a name="l00397"></a>00397 memcpy(dest, (<a class="code" href="environ_8h.html#a7ed60554e7d6dd89aca643189b1e70ad">l_uint8</a> *)(bb-><a class="code" href="struct_byte_buffer.html#ad7570422e25577fe63f29c8db2b466c3">array</a> + bb-><a class="code" href="struct_byte_buffer.html#a208966bb31d3b30c011a730713760898">nwritten</a>), nout);
<a name="l00398"></a>00398 bb-><a class="code" href="struct_byte_buffer.html#a208966bb31d3b30c011a730713760898">nwritten</a> += nout;
<a name="l00399"></a>00399
<a name="l00400"></a>00400 <span class="comment">/* If all written; "empty" the buffer */</span>
<a name="l00401"></a>00401 <span class="keywordflow">if</span> (nout == nleft) {
<a name="l00402"></a>00402 bb-><a class="code" href="struct_byte_buffer.html#a8863999998fc6faf17da4aa516889c53">n</a> = 0;
<a name="l00403"></a>00403 bb-><a class="code" href="struct_byte_buffer.html#a208966bb31d3b30c011a730713760898">nwritten</a> = 0;
<a name="l00404"></a>00404 }
<a name="l00405"></a>00405
<a name="l00406"></a>00406 <span class="keywordflow">return</span> 0;
<a name="l00407"></a>00407 }
<a name="l00408"></a>00408
<a name="l00409"></a>00409 <span class="comment"></span>
<a name="l00410"></a>00410 <span class="comment">/*!</span>
<a name="l00411"></a>00411 <span class="comment"> * bbufferWriteStream()</span>
<a name="l00412"></a>00412 <span class="comment"> *</span>
<a name="l00413"></a>00413 <span class="comment"> * Input: bbuffer</span>
<a name="l00414"></a>00414 <span class="comment"> * fp (dest stream to which bytes are written)</span>
<a name="l00415"></a>00415 <span class="comment"> * nbytes (bytes requested to be written)</span>
<a name="l00416"></a>00416 <span class="comment"> * &nout (<return> bytes actually written)</span>
<a name="l00417"></a>00417 <span class="comment"> * Return: 0 if OK, 1 on error</span>
<a name="l00418"></a>00418 <span class="comment"> */</span>
<a name="l00419"></a>00419 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a>
<a name="l00420"></a><a class="code" href="leptprotos_8h.html#a80408a9898a1a4614abc759147430aee">00420</a> <a class="code" href="bbuffer_8c.html#a0699cae890821473261aa5d733d4c083">bbufferWriteStream</a>(<a class="code" href="struct_byte_buffer.html">BBUFFER</a> *bb,
<a name="l00421"></a>00421 FILE *fp,
<a name="l00422"></a>00422 <span class="keywordtype">size_t</span> nbytes,
<a name="l00423"></a>00423 <span class="keywordtype">size_t</span> *pnout)
<a name="l00424"></a>00424 {
<a name="l00425"></a>00425 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a> nleft, nout;
<a name="l00426"></a>00426
<a name="l00427"></a>00427 <a class="code" href="environ_8h.html#a1a16952819bcbc526c998e3ac86f2e78">PROCNAME</a>(<span class="stringliteral">"bbufferWriteStream"</span>);
<a name="l00428"></a>00428
<a name="l00429"></a>00429 <span class="keywordflow">if</span> (!bb)
<a name="l00430"></a>00430 <span class="keywordflow">return</span> <a class="code" href="environ_8h.html#a8b17fe871312c2e1613fa694bb78a963">ERROR_INT</a>(<span class="stringliteral">"bb not defined"</span>, procName, 1);
<a name="l00431"></a>00431 <span class="keywordflow">if</span> (!fp)
<a name="l00432"></a>00432 <span class="keywordflow">return</span> <a class="code" href="environ_8h.html#a8b17fe871312c2e1613fa694bb78a963">ERROR_INT</a>(<span class="stringliteral">"output stream not defined"</span>, procName, 1);
<a name="l00433"></a>00433 <span class="keywordflow">if</span> (nbytes <= 0)
<a name="l00434"></a>00434 <span class="keywordflow">return</span> <a class="code" href="environ_8h.html#a8b17fe871312c2e1613fa694bb78a963">ERROR_INT</a>(<span class="stringliteral">"no bytes requested to write"</span>, procName, 1);
<a name="l00435"></a>00435 <span class="keywordflow">if</span> (!pnout)
<a name="l00436"></a>00436 <span class="keywordflow">return</span> <a class="code" href="environ_8h.html#a8b17fe871312c2e1613fa694bb78a963">ERROR_INT</a>(<span class="stringliteral">"&nout not defined"</span>, procName, 1);
<a name="l00437"></a>00437
<a name="l00438"></a>00438 nleft = bb-><a class="code" href="struct_byte_buffer.html#a8863999998fc6faf17da4aa516889c53">n</a> - bb-><a class="code" href="struct_byte_buffer.html#a208966bb31d3b30c011a730713760898">nwritten</a>;
<a name="l00439"></a>00439 nout = <a class="code" href="environ_8h.html#a67d588ee5ca71be19990efb07fa2ce72">L_MIN</a>(nleft, nbytes);
<a name="l00440"></a>00440 *pnout = nout;
<a name="l00441"></a>00441
<a name="l00442"></a>00442 <span class="keywordflow">if</span> (nleft == 0) { <span class="comment">/* nothing to write; reinitialize the buffer */</span>
<a name="l00443"></a>00443 bb-><a class="code" href="struct_byte_buffer.html#a8863999998fc6faf17da4aa516889c53">n</a> = 0;
<a name="l00444"></a>00444 bb-><a class="code" href="struct_byte_buffer.html#a208966bb31d3b30c011a730713760898">nwritten</a> = 0;
<a name="l00445"></a>00445 <span class="keywordflow">return</span> 0;
<a name="l00446"></a>00446 }
<a name="l00447"></a>00447
<a name="l00448"></a>00448 <span class="comment">/* nout > 0; transfer the data out */</span>
<a name="l00449"></a>00449 fwrite((<span class="keywordtype">void</span> *)(bb-><a class="code" href="struct_byte_buffer.html#ad7570422e25577fe63f29c8db2b466c3">array</a> + bb-><a class="code" href="struct_byte_buffer.html#a208966bb31d3b30c011a730713760898">nwritten</a>), 1, nout, fp);
<a name="l00450"></a>00450 bb-><a class="code" href="struct_byte_buffer.html#a208966bb31d3b30c011a730713760898">nwritten</a> += nout;
<a name="l00451"></a>00451
<a name="l00452"></a>00452 <span class="comment">/* If all written; "empty" the buffer */</span>
<a name="l00453"></a>00453 <span class="keywordflow">if</span> (nout == nleft) {
<a name="l00454"></a>00454 bb-><a class="code" href="struct_byte_buffer.html#a8863999998fc6faf17da4aa516889c53">n</a> = 0;
<a name="l00455"></a>00455 bb-><a class="code" href="struct_byte_buffer.html#a208966bb31d3b30c011a730713760898">nwritten</a> = 0;
<a name="l00456"></a>00456 }
<a name="l00457"></a>00457
<a name="l00458"></a>00458 <span class="keywordflow">return</span> 0;
<a name="l00459"></a>00459 }
<a name="l00460"></a>00460
<a name="l00461"></a>00461
<a name="l00462"></a>00462
<a name="l00463"></a>00463 <span class="comment">/*--------------------------------------------------------------------------*</span>
<a name="l00464"></a>00464 <span class="comment"> * Accessors *</span>
<a name="l00465"></a>00465 <span class="comment"> *--------------------------------------------------------------------------*/</span><span class="comment"></span>
<a name="l00466"></a>00466 <span class="comment">/*!</span>
<a name="l00467"></a>00467 <span class="comment"> * bbufferBytesToWrite()</span>
<a name="l00468"></a>00468 <span class="comment"> *</span>
<a name="l00469"></a>00469 <span class="comment"> * Input: bbuffer</span>
<a name="l00470"></a>00470 <span class="comment"> * &nbytes (<return>)</span>
<a name="l00471"></a>00471 <span class="comment"> * Return: 0 if OK; 1 on error</span>
<a name="l00472"></a>00472 <span class="comment"> */</span>
<a name="l00473"></a>00473 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a>
<a name="l00474"></a><a class="code" href="leptprotos_8h.html#a58a1bdbae62ef8449c43fc69cc3e4287">00474</a> <a class="code" href="bbuffer_8c.html#aef445771dcd739e44cbcc82d9c98be2f">bbufferBytesToWrite</a>(<a class="code" href="struct_byte_buffer.html">BBUFFER</a> *bb,
<a name="l00475"></a>00475 <span class="keywordtype">size_t</span> *pnbytes)
<a name="l00476"></a>00476 {
<a name="l00477"></a>00477 <a class="code" href="environ_8h.html#a1a16952819bcbc526c998e3ac86f2e78">PROCNAME</a>(<span class="stringliteral">"bbufferBytesToWrite"</span>);
<a name="l00478"></a>00478
<a name="l00479"></a>00479 <span class="keywordflow">if</span> (!bb)
<a name="l00480"></a>00480 <span class="keywordflow">return</span> <a class="code" href="environ_8h.html#a8b17fe871312c2e1613fa694bb78a963">ERROR_INT</a>(<span class="stringliteral">"bb not defined"</span>, procName, 1);
<a name="l00481"></a>00481 <span class="keywordflow">if</span> (!pnbytes)
<a name="l00482"></a>00482 <span class="keywordflow">return</span> <a class="code" href="environ_8h.html#a8b17fe871312c2e1613fa694bb78a963">ERROR_INT</a>(<span class="stringliteral">"&nbytes not defined"</span>, procName, 1);
<a name="l00483"></a>00483
<a name="l00484"></a>00484 *pnbytes = bb-><a class="code" href="struct_byte_buffer.html#a8863999998fc6faf17da4aa516889c53">n</a> - bb-><a class="code" href="struct_byte_buffer.html#a208966bb31d3b30c011a730713760898">nwritten</a>;
<a name="l00485"></a>00485 <span class="keywordflow">return</span> 0;
<a name="l00486"></a>00486 }
<a name="l00487"></a>00487
<a name="l00488"></a>00488
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