<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<title>id3lib: src/io_helpers.cpp Source File</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<link href="id3lib.css" rel="stylesheet" type="text/css"/>
</head>
<body>
<!-- Generated by Doxygen 1.6.3 -->
<div class="navigation" id="top">
<div class="tabs">
<ul>
<li><a href="index.html"><span>Main Page</span></a></li>
<li><a href="namespaces.html"><span>Namespaces</span></a></li>
<li><a href="annotated.html"><span>Classes</span></a></li>
<li class="current"><a href="files.html"><span>Files</span></a></li>
</ul>
</div>
<div class="tabs">
<ul>
<li><a href="files.html"><span>File List</span></a></li>
<li><a href="globals.html"><span>File Members</span></a></li>
</ul>
</div>
<h1>src/io_helpers.cpp</h1><a href="io__helpers_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// $Id: io_helpers.cpp,v 1.13 2002/07/02 22:13:56 t1mpy Exp $</span>
<a name="l00002"></a>00002
<a name="l00003"></a>00003 <span class="comment">// id3lib: a C++ library for creating and manipulating id3v1/v2 tags</span>
<a name="l00004"></a>00004 <span class="comment">// Copyright 1999, 2000 Scott Thomas Haug</span>
<a name="l00005"></a>00005
<a name="l00006"></a>00006 <span class="comment">// This library is free software; you can redistribute it and/or modify it</span>
<a name="l00007"></a>00007 <span class="comment">// under the terms of the GNU Library General Public License as published by</span>
<a name="l00008"></a>00008 <span class="comment">// the Free Software Foundation; either version 2 of the License, or (at your</span>
<a name="l00009"></a>00009 <span class="comment">// option) any later version.</span>
<a name="l00010"></a>00010 <span class="comment">//</span>
<a name="l00011"></a>00011 <span class="comment">// This library is distributed in the hope that it will be useful, but WITHOUT</span>
<a name="l00012"></a>00012 <span class="comment">// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or</span>
<a name="l00013"></a>00013 <span class="comment">// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public</span>
<a name="l00014"></a>00014 <span class="comment">// License for more details.</span>
<a name="l00015"></a>00015 <span class="comment">//</span>
<a name="l00016"></a>00016 <span class="comment">// You should have received a copy of the GNU Library General Public License</span>
<a name="l00017"></a>00017 <span class="comment">// along with this library; if not, write to the Free Software Foundation,</span>
<a name="l00018"></a>00018 <span class="comment">// Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.</span>
<a name="l00019"></a>00019
<a name="l00020"></a>00020 <span class="comment">// The id3lib authors encourage improvements and optimisations to be sent to</span>
<a name="l00021"></a>00021 <span class="comment">// the id3lib coordinator. Please see the README file for details on where to</span>
<a name="l00022"></a>00022 <span class="comment">// send such submissions. See the AUTHORS file for a list of people who have</span>
<a name="l00023"></a>00023 <span class="comment">// contributed to id3lib. See the ChangeLog file for a list of changes to</span>
<a name="l00024"></a>00024 <span class="comment">// id3lib. These files are distributed with id3lib at</span>
<a name="l00025"></a>00025 <span class="comment">// http://download.sourceforge.net/id3lib/</span>
<a name="l00026"></a>00026
<a name="l00027"></a>00027 <span class="preprocessor">#if defined HAVE_CONFIG_H</span>
<a name="l00028"></a>00028 <span class="preprocessor"></span><span class="preprocessor">#include <config.h></span>
<a name="l00029"></a>00029 <span class="preprocessor">#endif</span>
<a name="l00030"></a>00030 <span class="preprocessor"></span>
<a name="l00031"></a>00031 <span class="preprocessor">#include "<a class="code" href="io__decorators_8h.html">id3/io_decorators.h</a>"</span> <span class="comment">//has "readers.h" "io_helpers.h" "utils.h"</span>
<a name="l00032"></a>00032
<a name="l00033"></a>00033 <span class="keyword">using namespace </span>dami;
<a name="l00034"></a>00034
<a name="l00035"></a><a class="code" href="namespacedami_1_1io.html#a85756229971b914c312adaacb48d9772">00035</a> String <a class="code" href="namespacedami_1_1io.html#a85756229971b914c312adaacb48d9772">io::readString</a>(<a class="code" href="class_i_d3___reader.html">ID3_Reader</a>& reader)
<a name="l00036"></a>00036 {
<a name="l00037"></a>00037 String str;
<a name="l00038"></a>00038 <span class="keywordflow">while</span> (!reader.<a class="code" href="class_i_d3___reader.html#a2d7e9a6e4c4c5f751035ea507c6cadb5">atEnd</a>())
<a name="l00039"></a>00039 {
<a name="l00040"></a>00040 <a class="code" href="class_i_d3___reader.html#abc80771e4ce81188082eaa8fa90a67e6">ID3_Reader::char_type</a> ch = reader.<a class="code" href="class_i_d3___reader.html#a36e43a57e3ff194ed6e0416c409fbed3" title="Read a single character and advance the internal position.">readChar</a>();
<a name="l00041"></a>00041 <span class="keywordflow">if</span> (ch == <span class="charliteral">'\0'</span>)
<a name="l00042"></a>00042 {
<a name="l00043"></a>00043 <span class="keywordflow">break</span>;
<a name="l00044"></a>00044 }
<a name="l00045"></a>00045 str += <span class="keyword">static_cast<</span><span class="keywordtype">char</span><span class="keyword">></span>(ch);
<a name="l00046"></a>00046 }
<a name="l00047"></a>00047 <span class="keywordflow">return</span> str;
<a name="l00048"></a>00048 }
<a name="l00049"></a>00049
<a name="l00050"></a><a class="code" href="namespacedami_1_1io.html#a6a5f04ebd2a255b1e4b6fe8dca8f6b4c">00050</a> String <a class="code" href="namespacedami_1_1io.html#a6a5f04ebd2a255b1e4b6fe8dca8f6b4c">io::readText</a>(<a class="code" href="class_i_d3___reader.html">ID3_Reader</a>& reader, <span class="keywordtype">size_t</span> len)
<a name="l00051"></a>00051 {
<a name="l00052"></a>00052 String str;
<a name="l00053"></a>00053 str.reserve(len);
<a name="l00054"></a>00054 <span class="keyword">const</span> <span class="keywordtype">size_t</span> SIZE = 1024;
<a name="l00055"></a>00055 <a class="code" href="class_i_d3___reader.html#abc80771e4ce81188082eaa8fa90a67e6">ID3_Reader::char_type</a> buf[SIZE];
<a name="l00056"></a>00056 <span class="keywordtype">size_t</span> remaining = len;
<a name="l00057"></a>00057 <span class="keywordflow">while</span> (remaining > 0 && !reader.<a class="code" href="class_i_d3___reader.html#a2d7e9a6e4c4c5f751035ea507c6cadb5">atEnd</a>())
<a name="l00058"></a>00058 {
<a name="l00059"></a>00059 <span class="keywordtype">size_t</span> numRead = reader.<a class="code" href="class_i_d3___reader.html#a271015a0481e80ca63bfea9ff9320a50" title="Read up to len characters into buf and advance the internal position accordingly...">readChars</a>(buf, <a class="code" href="io__strings_8h.html#ac6afabdc09a49a433ee19d8a9486056d">min</a>(remaining, SIZE));
<a name="l00060"></a>00060 remaining -= numRead;
<a name="l00061"></a>00061 str.append(reinterpret_cast<String::value_type *>(buf), numRead);
<a name="l00062"></a>00062 }
<a name="l00063"></a>00063 <span class="keywordflow">return</span> str;
<a name="l00064"></a>00064 }
<a name="l00065"></a>00065
<a name="l00066"></a>00066 <span class="keyword">namespace</span>
<a name="l00067"></a>00067 {
<a name="l00068"></a>00068 <span class="keywordtype">bool</span> isNull(<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> ch1, <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> ch2)
<a name="l00069"></a>00069 {
<a name="l00070"></a>00070 <span class="keywordflow">return</span> ch1 == <span class="charliteral">'\0'</span> && ch2 == <span class="charliteral">'\0'</span>;
<a name="l00071"></a>00071 }
<a name="l00072"></a>00072
<a name="l00073"></a>00073 <span class="keywordtype">int</span> isBOM(<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> ch1, <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> ch2)
<a name="l00074"></a>00074 {
<a name="l00075"></a>00075 <span class="comment">// The following is taken from the following URL:</span>
<a name="l00076"></a>00076 <span class="comment">// http://community.roxen.com/developers/idocs/rfc/rfc2781.html</span>
<a name="l00077"></a>00077 <span class="comment">/* The Unicode Standard and ISO 10646 define the character "ZERO WIDTH</span>
<a name="l00078"></a>00078 <span class="comment"> NON-BREAKING SPACE" (0xFEFF), which is also known informally as</span>
<a name="l00079"></a>00079 <span class="comment"> "BYTE ORDER MARK" (abbreviated "BOM"). The latter name hints at a</span>
<a name="l00080"></a>00080 <span class="comment"> second possible usage of the character, in addition to its normal</span>
<a name="l00081"></a>00081 <span class="comment"> use as a genuine "ZERO WIDTH NON-BREAKING SPACE" within text. This</span>
<a name="l00082"></a>00082 <span class="comment"> usage, suggested by Unicode section 2.4 and ISO 10646 Annex F</span>
<a name="l00083"></a>00083 <span class="comment"> (informative), is to prepend a 0xFEFF character to a stream of</span>
<a name="l00084"></a>00084 <span class="comment"> Unicode characters as a "signature"; a receiver of such a serialized</span>
<a name="l00085"></a>00085 <span class="comment"> stream may then use the initial character both as a hint that the</span>
<a name="l00086"></a>00086 <span class="comment"> stream consists of Unicode characters and as a way to recognize the</span>
<a name="l00087"></a>00087 <span class="comment"> serialization order. In serialized UTF-16 prepended with such a</span>
<a name="l00088"></a>00088 <span class="comment"> signature, the order is big-endian if the first two octets are 0xFE</span>
<a name="l00089"></a>00089 <span class="comment"> followed by 0xFF; if they are 0xFF followed by 0xFE, the order is</span>
<a name="l00090"></a>00090 <span class="comment"> little-endian. Note that 0xFFFE is not a Unicode character,</span>
<a name="l00091"></a>00091 <span class="comment"> precisely to preserve the usefulness of 0xFEFF as a byte-order</span>
<a name="l00092"></a>00092 <span class="comment"> mark. */</span>
<a name="l00093"></a>00093
<a name="l00094"></a>00094 <span class="keywordflow">if</span> (ch1 == 0xFE && ch2 == 0xFF)
<a name="l00095"></a>00095 {
<a name="l00096"></a>00096 <span class="keywordflow">return</span> 1;
<a name="l00097"></a>00097 }
<a name="l00098"></a>00098 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (ch1 == 0xFF && ch2 == 0xFE)
<a name="l00099"></a>00099 {
<a name="l00100"></a>00100 <span class="keywordflow">return</span> -1;
<a name="l00101"></a>00101 }
<a name="l00102"></a>00102 <span class="keywordflow">return</span> 0;
<a name="l00103"></a>00103 }
<a name="l00104"></a>00104
<a name="l00105"></a>00105 <span class="keywordtype">bool</span> readTwoChars(<a class="code" href="class_i_d3___reader.html">ID3_Reader</a>& reader,
<a name="l00106"></a>00106 <a class="code" href="class_i_d3___reader.html#abc80771e4ce81188082eaa8fa90a67e6">ID3_Reader::char_type</a>& ch1,
<a name="l00107"></a>00107 <a class="code" href="class_i_d3___reader.html#abc80771e4ce81188082eaa8fa90a67e6">ID3_Reader::char_type</a>& ch2)
<a name="l00108"></a>00108 {
<a name="l00109"></a>00109 <span class="keywordflow">if</span> (reader.<a class="code" href="class_i_d3___reader.html#a2d7e9a6e4c4c5f751035ea507c6cadb5">atEnd</a>())
<a name="l00110"></a>00110 {
<a name="l00111"></a>00111 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00112"></a>00112 }
<a name="l00113"></a>00113 <a class="code" href="classdami_1_1io_1_1_exit_trigger.html">io::ExitTrigger</a> et(reader);
<a name="l00114"></a>00114 ch1 = reader.<a class="code" href="class_i_d3___reader.html#a36e43a57e3ff194ed6e0416c409fbed3" title="Read a single character and advance the internal position.">readChar</a>();
<a name="l00115"></a>00115 <span class="keywordflow">if</span> (reader.<a class="code" href="class_i_d3___reader.html#a2d7e9a6e4c4c5f751035ea507c6cadb5">atEnd</a>())
<a name="l00116"></a>00116 {
<a name="l00117"></a>00117 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00118"></a>00118 }
<a name="l00119"></a>00119 et.release();
<a name="l00120"></a>00120 ch2 = reader.<a class="code" href="class_i_d3___reader.html#a36e43a57e3ff194ed6e0416c409fbed3" title="Read a single character and advance the internal position.">readChar</a>();
<a name="l00121"></a>00121 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00122"></a>00122 }
<a name="l00123"></a>00123 }
<a name="l00124"></a>00124
<a name="l00125"></a><a class="code" href="namespacedami_1_1io.html#a6d39a66d892d7ca34bd3e2f41c17f674">00125</a> String <a class="code" href="namespacedami_1_1io.html#a6d39a66d892d7ca34bd3e2f41c17f674">io::readUnicodeString</a>(<a class="code" href="class_i_d3___reader.html">ID3_Reader</a>& reader)
<a name="l00126"></a>00126 {
<a name="l00127"></a>00127 String unicode;
<a name="l00128"></a>00128 <a class="code" href="class_i_d3___reader.html#abc80771e4ce81188082eaa8fa90a67e6">ID3_Reader::char_type</a> ch1, ch2;
<a name="l00129"></a>00129 <span class="keywordflow">if</span> (!readTwoChars(reader, ch1, ch2) || isNull(ch1, ch2))
<a name="l00130"></a>00130 {
<a name="l00131"></a>00131 <span class="keywordflow">return</span> unicode;
<a name="l00132"></a>00132 }
<a name="l00133"></a>00133 <span class="keywordtype">int</span> bom = isBOM(ch1, ch2);
<a name="l00134"></a>00134 <span class="keywordflow">if</span> (!bom)
<a name="l00135"></a>00135 {
<a name="l00136"></a>00136 unicode += <span class="keyword">static_cast<</span><span class="keywordtype">char</span><span class="keyword">></span>(ch1);
<a name="l00137"></a>00137 unicode += <span class="keyword">static_cast<</span><span class="keywordtype">char</span><span class="keyword">></span>(ch2);
<a name="l00138"></a>00138 }
<a name="l00139"></a>00139 <span class="keywordflow">while</span> (!reader.<a class="code" href="class_i_d3___reader.html#a2d7e9a6e4c4c5f751035ea507c6cadb5">atEnd</a>())
<a name="l00140"></a>00140 {
<a name="l00141"></a>00141 <span class="keywordflow">if</span> (!readTwoChars(reader, ch1, ch2) || isNull(ch1, ch2))
<a name="l00142"></a>00142 {
<a name="l00143"></a>00143 <span class="keywordflow">break</span>;
<a name="l00144"></a>00144 }
<a name="l00145"></a>00145 <span class="keywordflow">if</span> (bom == -1)
<a name="l00146"></a>00146 {
<a name="l00147"></a>00147 unicode += <span class="keyword">static_cast<</span><span class="keywordtype">char</span><span class="keyword">></span>(ch2);
<a name="l00148"></a>00148 unicode += <span class="keyword">static_cast<</span><span class="keywordtype">char</span><span class="keyword">></span>(ch1);
<a name="l00149"></a>00149 }
<a name="l00150"></a>00150 <span class="keywordflow">else</span>
<a name="l00151"></a>00151 {
<a name="l00152"></a>00152 unicode += <span class="keyword">static_cast<</span><span class="keywordtype">char</span><span class="keyword">></span>(ch1);
<a name="l00153"></a>00153 unicode += <span class="keyword">static_cast<</span><span class="keywordtype">char</span><span class="keyword">></span>(ch2);
<a name="l00154"></a>00154 }
<a name="l00155"></a>00155 }
<a name="l00156"></a>00156 <span class="keywordflow">return</span> unicode;
<a name="l00157"></a>00157 }
<a name="l00158"></a>00158
<a name="l00159"></a><a class="code" href="namespacedami_1_1io.html#acfb2361ea58790054d50b9b29491e5f0">00159</a> String <a class="code" href="namespacedami_1_1io.html#acfb2361ea58790054d50b9b29491e5f0">io::readUnicodeText</a>(<a class="code" href="class_i_d3___reader.html">ID3_Reader</a>& reader, <span class="keywordtype">size_t</span> len)
<a name="l00160"></a>00160 {
<a name="l00161"></a>00161 String unicode;
<a name="l00162"></a>00162 <a class="code" href="class_i_d3___reader.html#abc80771e4ce81188082eaa8fa90a67e6">ID3_Reader::char_type</a> ch1, ch2;
<a name="l00163"></a>00163 <span class="keywordflow">if</span> (!readTwoChars(reader, ch1, ch2))
<a name="l00164"></a>00164 {
<a name="l00165"></a>00165 <span class="keywordflow">return</span> unicode;
<a name="l00166"></a>00166 }
<a name="l00167"></a>00167 len -= 2;
<a name="l00168"></a>00168 <span class="keywordtype">int</span> bom = isBOM(ch1, ch2);
<a name="l00169"></a>00169 <span class="keywordflow">if</span> (!bom)
<a name="l00170"></a>00170 {
<a name="l00171"></a>00171 unicode += ch1;
<a name="l00172"></a>00172 unicode += ch2;
<a name="l00173"></a>00173 unicode += <a class="code" href="namespacedami_1_1io.html#a6a5f04ebd2a255b1e4b6fe8dca8f6b4c">readText</a>(reader, len);
<a name="l00174"></a>00174 }
<a name="l00175"></a>00175 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (bom == 1)
<a name="l00176"></a>00176 {
<a name="l00177"></a>00177 unicode = <a class="code" href="namespacedami_1_1io.html#a6a5f04ebd2a255b1e4b6fe8dca8f6b4c">readText</a>(reader, len);
<a name="l00178"></a>00178 }
<a name="l00179"></a>00179 <span class="keywordflow">else</span>
<a name="l00180"></a>00180 {
<a name="l00181"></a>00181 <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < len; i += 2)
<a name="l00182"></a>00182 {
<a name="l00183"></a>00183 <span class="keywordflow">if</span> (!readTwoChars(reader, ch1, ch2))
<a name="l00184"></a>00184 {
<a name="l00185"></a>00185 <span class="keywordflow">break</span>;
<a name="l00186"></a>00186 }
<a name="l00187"></a>00187 unicode += ch2;
<a name="l00188"></a>00188 unicode += ch1;
<a name="l00189"></a>00189 }
<a name="l00190"></a>00190 }
<a name="l00191"></a>00191 <span class="keywordflow">return</span> unicode;
<a name="l00192"></a>00192 }
<a name="l00193"></a>00193
<a name="l00194"></a><a class="code" href="namespacedami_1_1io.html#a1ffb5b2f29a7ced17e69418187d27c88">00194</a> BString <a class="code" href="namespacedami_1_1io.html#a1ffb5b2f29a7ced17e69418187d27c88">io::readAllBinary</a>(<a class="code" href="class_i_d3___reader.html">ID3_Reader</a>& reader)
<a name="l00195"></a>00195 {
<a name="l00196"></a>00196 <span class="keywordflow">return</span> <a class="code" href="namespacedami_1_1io.html#a63809196c867f3c6ca55767d4670229f">readBinary</a>(reader, reader.<a class="code" href="class_i_d3___reader.html#a8b516ba5335293c2f278c711161a3aec">remainingBytes</a>());
<a name="l00197"></a>00197 }
<a name="l00198"></a>00198
<a name="l00199"></a><a class="code" href="namespacedami_1_1io.html#a63809196c867f3c6ca55767d4670229f">00199</a> BString <a class="code" href="namespacedami_1_1io.html#a63809196c867f3c6ca55767d4670229f">io::readBinary</a>(<a class="code" href="class_i_d3___reader.html">ID3_Reader</a>& reader, <span class="keywordtype">size_t</span> len)
<a name="l00200"></a>00200 {
<a name="l00201"></a>00201 BString binary;
<a name="l00202"></a>00202 binary.reserve(len);
<a name="l00203"></a>00203
<a name="l00204"></a>00204 <span class="keywordtype">size_t</span> remaining = len;
<a name="l00205"></a>00205 <span class="keyword">const</span> <span class="keywordtype">size_t</span> SIZE = 1024;
<a name="l00206"></a>00206 <a class="code" href="class_i_d3___reader.html#abc80771e4ce81188082eaa8fa90a67e6">ID3_Reader::char_type</a> buf[SIZE];
<a name="l00207"></a>00207 <span class="keywordflow">while</span> (!reader.<a class="code" href="class_i_d3___reader.html#a2d7e9a6e4c4c5f751035ea507c6cadb5">atEnd</a>() && remaining > 0)
<a name="l00208"></a>00208 {
<a name="l00209"></a>00209 <span class="keywordtype">size_t</span> numRead = reader.<a class="code" href="class_i_d3___reader.html#a271015a0481e80ca63bfea9ff9320a50" title="Read up to len characters into buf and advance the internal position accordingly...">readChars</a>(buf, <a class="code" href="io__strings_8h.html#ac6afabdc09a49a433ee19d8a9486056d">min</a>(remaining, SIZE));
<a name="l00210"></a>00210 remaining -= numRead;
<a name="l00211"></a>00211 binary.append(reinterpret_cast<BString::value_type *>(buf), numRead);
<a name="l00212"></a>00212 }
<a name="l00213"></a>00213
<a name="l00214"></a>00214 <span class="keywordflow">return</span> binary;
<a name="l00215"></a>00215 }
<a name="l00216"></a>00216
<a name="l00217"></a><a class="code" href="namespacedami_1_1io.html#a28e4b25e42d77cafebb7bd8b1dd046f2">00217</a> uint32 <a class="code" href="namespacedami_1_1io.html#a28e4b25e42d77cafebb7bd8b1dd046f2">io::readLENumber</a>(<a class="code" href="class_i_d3___reader.html">ID3_Reader</a>& reader, <span class="keywordtype">size_t</span> len)
<a name="l00218"></a>00218 {
<a name="l00219"></a>00219 uint32 val = 0;
<a name="l00220"></a>00220 <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < len; i++)
<a name="l00221"></a>00221 {
<a name="l00222"></a>00222 <span class="keywordflow">if</span> (reader.<a class="code" href="class_i_d3___reader.html#a2d7e9a6e4c4c5f751035ea507c6cadb5">atEnd</a>())
<a name="l00223"></a>00223 {
<a name="l00224"></a>00224 <span class="keywordflow">break</span>;
<a name="l00225"></a>00225 }
<a name="l00226"></a>00226 val += (<span class="keyword">static_cast<</span>uint32<span class="keyword">></span>(0xFF & reader.<a class="code" href="class_i_d3___reader.html#a36e43a57e3ff194ed6e0416c409fbed3" title="Read a single character and advance the internal position.">readChar</a>()) << (i * 8));
<a name="l00227"></a>00227 }
<a name="l00228"></a>00228 <span class="keywordflow">return</span> val;
<a name="l00229"></a>00229 }
<a name="l00230"></a>00230
<a name="l00231"></a><a class="code" href="namespacedami_1_1io.html#a4795dfc73c82683365f2738567c1d805">00231</a> uint32 <a class="code" href="namespacedami_1_1io.html#a4795dfc73c82683365f2738567c1d805">io::readBENumber</a>(<a class="code" href="class_i_d3___reader.html">ID3_Reader</a>& reader, <span class="keywordtype">size_t</span> len)
<a name="l00232"></a>00232 {
<a name="l00233"></a>00233 uint32 val = 0;
<a name="l00234"></a>00234
<a name="l00235"></a>00235 <span class="keywordflow">for</span> (<a class="code" href="class_i_d3___reader.html#ab3891f70b4b079fe887e2eb707ca060e">ID3_Reader::size_type</a> i = 0; i < len && !reader.<a class="code" href="class_i_d3___reader.html#a2d7e9a6e4c4c5f751035ea507c6cadb5">atEnd</a>(); ++i)
<a name="l00236"></a>00236 {
<a name="l00237"></a>00237 val *= 256; <span class="comment">// 2^8</span>
<a name="l00238"></a>00238 val += <span class="keyword">static_cast<</span>uint32<span class="keyword">></span>(0xFF & reader.<a class="code" href="class_i_d3___reader.html#a36e43a57e3ff194ed6e0416c409fbed3" title="Read a single character and advance the internal position.">readChar</a>());
<a name="l00239"></a>00239 }
<a name="l00240"></a>00240 <span class="keywordflow">return</span> val;
<a name="l00241"></a>00241 }
<a name="l00242"></a>00242
<a name="l00243"></a><a class="code" href="namespacedami_1_1io.html#ad944eb6e0be941c883b8c1bb50abc0f9">00243</a> String <a class="code" href="namespacedami_1_1io.html#ad944eb6e0be941c883b8c1bb50abc0f9">io::readTrailingSpaces</a>(<a class="code" href="class_i_d3___reader.html">ID3_Reader</a>& reader, <span class="keywordtype">size_t</span> len)
<a name="l00244"></a>00244 {
<a name="l00245"></a>00245 <a class="code" href="classdami_1_1io_1_1_windowed_reader.html" title="Set a window on the buffer.">io::WindowedReader</a> wr(reader, len);
<a name="l00246"></a>00246 String str;
<a name="l00247"></a>00247 String spaces;
<a name="l00248"></a>00248 str.reserve(len);
<a name="l00249"></a>00249 spaces.reserve(len);
<a name="l00250"></a>00250 <span class="keywordflow">while</span> (!wr.<a class="code" href="class_i_d3___reader.html#a2d7e9a6e4c4c5f751035ea507c6cadb5">atEnd</a>())
<a name="l00251"></a>00251 {
<a name="l00252"></a>00252 <a class="code" href="class_i_d3___reader.html#abc80771e4ce81188082eaa8fa90a67e6">ID3_Reader::char_type</a> ch = wr.<a class="code" href="classdami_1_1io_1_1_windowed_reader.html#af505113fe3eb0946124fd9e64afe4c8a" title="Read a single character and advance the internal position.">readChar</a>();
<a name="l00253"></a>00253 <span class="keywordflow">if</span> (ch == <span class="charliteral">'\0'</span> || ch == <span class="charliteral">' '</span>)
<a name="l00254"></a>00254 {
<a name="l00255"></a>00255 spaces += ch;
<a name="l00256"></a>00256 }
<a name="l00257"></a>00257 <span class="keywordflow">else</span>
<a name="l00258"></a>00258 {
<a name="l00259"></a>00259 str += spaces + (char) ch;
<a name="l00260"></a>00260 spaces.erase();
<a name="l00261"></a>00261 }
<a name="l00262"></a>00262 }
<a name="l00263"></a>00263 <span class="keywordflow">return</span> str;
<a name="l00264"></a>00264 }
<a name="l00265"></a>00265
<a name="l00266"></a><a class="code" href="namespacedami_1_1io.html#a34fe31bc8d1ac37a6a5f33b93abcd322">00266</a> uint32 <a class="code" href="namespacedami_1_1io.html#a34fe31bc8d1ac37a6a5f33b93abcd322">io::readUInt28</a>(<a class="code" href="class_i_d3___reader.html">ID3_Reader</a>& reader)
<a name="l00267"></a>00267 {
<a name="l00268"></a>00268 uint32 val = 0;
<a name="l00269"></a>00269 <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> BITSUSED = 7;
<a name="l00270"></a>00270 <span class="keyword">const</span> uint32 MAXVAL = <a class="code" href="globals_8h.html#a149cf2d890a39a9531e45c7c4e97123d">MASK</a>(BITSUSED * <span class="keyword">sizeof</span>(uint32));
<a name="l00271"></a>00271 <span class="comment">// For each byte of the first 4 bytes in the string...</span>
<a name="l00272"></a>00272 <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < <span class="keyword">sizeof</span>(uint32); ++i)
<a name="l00273"></a>00273 {
<a name="l00274"></a>00274 <span class="keywordflow">if</span> (reader.<a class="code" href="class_i_d3___reader.html#a2d7e9a6e4c4c5f751035ea507c6cadb5">atEnd</a>())
<a name="l00275"></a>00275 {
<a name="l00276"></a>00276 <span class="keywordflow">break</span>;
<a name="l00277"></a>00277 }
<a name="l00278"></a>00278 <span class="comment">// ...append the last 7 bits to the end of the temp integer...</span>
<a name="l00279"></a>00279 val = (val << BITSUSED) | static_cast<uint32>(reader.<a class="code" href="class_i_d3___reader.html#a36e43a57e3ff194ed6e0416c409fbed3" title="Read a single character and advance the internal position.">readChar</a>()) & <a class="code" href="globals_8h.html#a149cf2d890a39a9531e45c7c4e97123d">MASK</a>(BITSUSED);
<a name="l00280"></a>00280 }
<a name="l00281"></a>00281
<a name="l00282"></a>00282 <span class="comment">// We should always parse 4 characters</span>
<a name="l00283"></a>00283 <span class="keywordflow">return</span> <a class="code" href="io__strings_8h.html#ac6afabdc09a49a433ee19d8a9486056d">min</a>(val, MAXVAL);
<a name="l00284"></a>00284 }
<a name="l00285"></a>00285
<a name="l00286"></a><a class="code" href="namespacedami_1_1io.html#aca584020fcdd2925490c52af0eca5dcb">00286</a> <span class="keywordtype">size_t</span> <a class="code" href="namespacedami_1_1io.html#aca584020fcdd2925490c52af0eca5dcb">io::writeBENumber</a>(<a class="code" href="class_i_d3___writer.html">ID3_Writer</a>& writer, uint32 val, <span class="keywordtype">size_t</span> len)
<a name="l00287"></a>00287 {
<a name="l00288"></a>00288 <a class="code" href="class_i_d3___writer.html#a994b16b0240f854ce6e50f58a93bae23">ID3_Writer::char_type</a> bytes[<span class="keyword">sizeof</span>(uint32)];
<a name="l00289"></a>00289 <a class="code" href="class_i_d3___writer.html#afc6c0639631a72aca77af87de8bad947">ID3_Writer::size_type</a> size = min<ID3_Reader::size_type>(len, <span class="keyword">sizeof</span>(uint32));
<a name="l00290"></a>00290 renderNumber(bytes, val, size);
<a name="l00291"></a>00291 <span class="keywordflow">return</span> writer.<a class="code" href="class_i_d3___writer.html#a287fd94f06b37fb638029b904e6f1d42" title="Write up to len characters into buf and advance the internal position accordingly...">writeChars</a>(bytes, size);
<a name="l00292"></a>00292 }
<a name="l00293"></a>00293
<a name="l00294"></a><a class="code" href="namespacedami_1_1io.html#a48c5360321d009c714964e09953ba134">00294</a> <span class="keywordtype">size_t</span> <a class="code" href="namespacedami_1_1io.html#a48c5360321d009c714964e09953ba134">io::writeTrailingSpaces</a>(<a class="code" href="class_i_d3___writer.html">ID3_Writer</a>& writer, String buf, <span class="keywordtype">size_t</span> len)
<a name="l00295"></a>00295 {
<a name="l00296"></a>00296 <a class="code" href="class_i_d3___writer.html#acc8ea5caeb95f604ab658d6ccd50b13c">ID3_Writer::pos_type</a> beg = writer.<a class="code" href="class_i_d3___writer.html#ab1e742def0bdb4d9f209537c1eff004e" title="Return the next position that will be written to.">getCur</a>();
<a name="l00297"></a>00297 <a class="code" href="class_i_d3___writer.html#afc6c0639631a72aca77af87de8bad947">ID3_Writer::size_type</a> strLen = buf.size();
<a name="l00298"></a>00298 <a class="code" href="class_i_d3___writer.html#afc6c0639631a72aca77af87de8bad947">ID3_Writer::size_type</a> size = <a class="code" href="io__strings_8h.html#ac6afabdc09a49a433ee19d8a9486056d">min</a>((<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>)len, (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span>)strLen);
<a name="l00299"></a>00299 writer.<a class="code" href="class_i_d3___writer.html#a287fd94f06b37fb638029b904e6f1d42" title="Write up to len characters into buf and advance the internal position accordingly...">writeChars</a>(buf.data(), size);
<a name="l00300"></a>00300 <span class="keywordflow">for</span> (; size < len; ++size)
<a name="l00301"></a>00301 {
<a name="l00302"></a>00302 writer.<a class="code" href="class_i_d3___writer.html#a2fd7fda2100f38a45038b80de8ed4432" title="Write a single character and advance the internal position.">writeChar</a>(<span class="charliteral">'\0'</span>);
<a name="l00303"></a>00303 }
<a name="l00304"></a>00304 <span class="keywordflow">return</span> writer.<a class="code" href="class_i_d3___writer.html#ab1e742def0bdb4d9f209537c1eff004e" title="Return the next position that will be written to.">getCur</a>() - beg;
<a name="l00305"></a>00305 }
<a name="l00306"></a>00306
<a name="l00307"></a><a class="code" href="namespacedami_1_1io.html#a0cb48ad8042a6726eea33481f6a92ee0">00307</a> <span class="keywordtype">size_t</span> <a class="code" href="namespacedami_1_1io.html#a0cb48ad8042a6726eea33481f6a92ee0">io::writeUInt28</a>(<a class="code" href="class_i_d3___writer.html">ID3_Writer</a>& writer, uint32 val)
<a name="l00308"></a>00308 {
<a name="l00309"></a>00309 <a class="code" href="globals_8h.html#a65f85814a8290f9797005d3b28e7e5fc">uchar</a> data[<span class="keyword">sizeof</span>(uint32)];
<a name="l00310"></a>00310 <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">short</span> BITSUSED = 7;
<a name="l00311"></a>00311 <span class="keyword">const</span> uint32 MAXVAL = <a class="code" href="globals_8h.html#a149cf2d890a39a9531e45c7c4e97123d">MASK</a>(BITSUSED * <span class="keyword">sizeof</span>(uint32));
<a name="l00312"></a>00312 val = <a class="code" href="io__strings_8h.html#ac6afabdc09a49a433ee19d8a9486056d">min</a>(val, MAXVAL);
<a name="l00313"></a>00313 <span class="comment">// This loop renders the value to the character buffer in reverse order, as </span>
<a name="l00314"></a>00314 <span class="comment">// it is easy to extract the last 7 bits of an integer. This is why the</span>
<a name="l00315"></a>00315 <span class="comment">// loop shifts the value of the integer by 7 bits for each iteration.</span>
<a name="l00316"></a>00316 <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < <span class="keyword">sizeof</span>(uint32); ++i)
<a name="l00317"></a>00317 {
<a name="l00318"></a>00318 <span class="comment">// Extract the last BITSUSED bits from val and put it in its appropriate</span>
<a name="l00319"></a>00319 <span class="comment">// place in the data buffer</span>
<a name="l00320"></a>00320 data[<span class="keyword">sizeof</span>(uint32) - i - 1] = static_cast<uchar>(val & <a class="code" href="globals_8h.html#a149cf2d890a39a9531e45c7c4e97123d">MASK</a>(BITSUSED));
<a name="l00321"></a>00321
<a name="l00322"></a>00322 <span class="comment">// The last BITSUSED bits were extracted from the val. So shift it to the</span>
<a name="l00323"></a>00323 <span class="comment">// right by that many bits for the next iteration</span>
<a name="l00324"></a>00324 val >>= BITSUSED;
<a name="l00325"></a>00325 }
<a name="l00326"></a>00326
<a name="l00327"></a>00327 <span class="comment">// Should always render 4 bytes</span>
<a name="l00328"></a>00328 <span class="keywordflow">return</span> writer.<a class="code" href="class_i_d3___writer.html#a287fd94f06b37fb638029b904e6f1d42" title="Write up to len characters into buf and advance the internal position accordingly...">writeChars</a>(data, <span class="keyword">sizeof</span>(uint32));
<a name="l00329"></a>00329 }
<a name="l00330"></a>00330
<a name="l00331"></a><a class="code" href="namespacedami_1_1io.html#a7d050db3f65d89a3e7b28b4417e62f77">00331</a> <span class="keywordtype">size_t</span> <a class="code" href="namespacedami_1_1io.html#a7d050db3f65d89a3e7b28b4417e62f77">io::writeString</a>(<a class="code" href="class_i_d3___writer.html">ID3_Writer</a>& writer, String data)
<a name="l00332"></a>00332 {
<a name="l00333"></a>00333 <span class="keywordtype">size_t</span> size = <a class="code" href="namespacedami_1_1io.html#a82a7316211b308abcb2022cbacc2db75">writeText</a>(writer, data);
<a name="l00334"></a>00334 writer.<a class="code" href="class_i_d3___writer.html#a2fd7fda2100f38a45038b80de8ed4432" title="Write a single character and advance the internal position.">writeChar</a>(<span class="charliteral">'\0'</span>);
<a name="l00335"></a>00335 <span class="keywordflow">return</span> size + 1;
<a name="l00336"></a>00336 }
<a name="l00337"></a>00337
<a name="l00338"></a><a class="code" href="namespacedami_1_1io.html#a82a7316211b308abcb2022cbacc2db75">00338</a> <span class="keywordtype">size_t</span> <a class="code" href="namespacedami_1_1io.html#a82a7316211b308abcb2022cbacc2db75">io::writeText</a>(<a class="code" href="class_i_d3___writer.html">ID3_Writer</a>& writer, String data)
<a name="l00339"></a>00339 {
<a name="l00340"></a>00340 <a class="code" href="class_i_d3___writer.html#acc8ea5caeb95f604ab658d6ccd50b13c">ID3_Writer::pos_type</a> beg = writer.<a class="code" href="class_i_d3___writer.html#ab1e742def0bdb4d9f209537c1eff004e" title="Return the next position that will be written to.">getCur</a>();
<a name="l00341"></a>00341 writer.<a class="code" href="class_i_d3___writer.html#a287fd94f06b37fb638029b904e6f1d42" title="Write up to len characters into buf and advance the internal position accordingly...">writeChars</a>(data.data(), data.size());
<a name="l00342"></a>00342 <span class="keywordflow">return</span> writer.<a class="code" href="class_i_d3___writer.html#ab1e742def0bdb4d9f209537c1eff004e" title="Return the next position that will be written to.">getCur</a>() - beg;
<a name="l00343"></a>00343 }
<a name="l00344"></a>00344
<a name="l00345"></a><a class="code" href="namespacedami_1_1io.html#a90e1e7414445e9dd670d9a5425701360">00345</a> <span class="keywordtype">size_t</span> <a class="code" href="namespacedami_1_1io.html#a90e1e7414445e9dd670d9a5425701360">io::writeUnicodeString</a>(<a class="code" href="class_i_d3___writer.html">ID3_Writer</a>& writer, String data, <span class="keywordtype">bool</span> bom)
<a name="l00346"></a>00346 {
<a name="l00347"></a>00347 <span class="keywordtype">size_t</span> size = <a class="code" href="namespacedami_1_1io.html#ae5dd27dc8370c88796cdc9b21eb27f62">writeUnicodeText</a>(writer, data, bom);
<a name="l00348"></a>00348 <a class="code" href="globals_8h.html#a781c2cce7ea2af8192d5f83427044add">unicode_t</a> null = <a class="code" href="globals_8h.html#adf2f9dc565f7cb248d7baf38c543376f">NULL_UNICODE</a>;
<a name="l00349"></a>00349 writer.<a class="code" href="class_i_d3___writer.html#a287fd94f06b37fb638029b904e6f1d42" title="Write up to len characters into buf and advance the internal position accordingly...">writeChars</a>((<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>*) &null, 2);
<a name="l00350"></a>00350 <span class="keywordflow">return</span> size + 2;
<a name="l00351"></a>00351 }
<a name="l00352"></a>00352
<a name="l00353"></a><a class="code" href="namespacedami_1_1io.html#ae5dd27dc8370c88796cdc9b21eb27f62">00353</a> <span class="keywordtype">size_t</span> <a class="code" href="namespacedami_1_1io.html#ae5dd27dc8370c88796cdc9b21eb27f62">io::writeUnicodeText</a>(<a class="code" href="class_i_d3___writer.html">ID3_Writer</a>& writer, String data, <span class="keywordtype">bool</span> bom)
<a name="l00354"></a>00354 {
<a name="l00355"></a>00355 <a class="code" href="class_i_d3___writer.html#acc8ea5caeb95f604ab658d6ccd50b13c">ID3_Writer::pos_type</a> beg = writer.<a class="code" href="class_i_d3___writer.html#ab1e742def0bdb4d9f209537c1eff004e" title="Return the next position that will be written to.">getCur</a>();
<a name="l00356"></a>00356 <span class="keywordtype">size_t</span> size = (data.size() / 2) * 2;
<a name="l00357"></a>00357 <span class="keywordflow">if</span> (size == 0)
<a name="l00358"></a>00358 {
<a name="l00359"></a>00359 <span class="keywordflow">return</span> 0;
<a name="l00360"></a>00360 }
<a name="l00361"></a>00361 <span class="keywordflow">if</span> (bom)
<a name="l00362"></a>00362 {
<a name="l00363"></a>00363 <span class="comment">// Write the BOM: 0xFEFF</span>
<a name="l00364"></a>00364 <a class="code" href="globals_8h.html#a781c2cce7ea2af8192d5f83427044add">unicode_t</a> BOM = 0xFEFF;
<a name="l00365"></a>00365 writer.<a class="code" href="class_i_d3___writer.html#a287fd94f06b37fb638029b904e6f1d42" title="Write up to len characters into buf and advance the internal position accordingly...">writeChars</a>((<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>*) &BOM, 2);
<a name="l00366"></a>00366 <span class="comment">// Patch from Spoon : 2004-08-25 14:17</span>
<a name="l00367"></a>00367 <span class="comment">// http://sourceforge.net/tracker/index.php?func=detail&aid=1016290&group_id=979&atid=300979</span>
<a name="l00368"></a>00368 <span class="comment">// Wrong code</span>
<a name="l00369"></a>00369 <span class="comment">//for (size_t i = 0; i < size; i += 2)</span>
<a name="l00370"></a>00370 <span class="comment">//{</span>
<a name="l00371"></a>00371 <span class="comment">// unicode_t ch = (data[i] << 8) | data[i+1];</span>
<a name="l00372"></a>00372 <span class="comment">// writer.writeChars((const unsigned char*) &ch, 2);</span>
<a name="l00373"></a>00373 <span class="comment">//}</span>
<a name="l00374"></a>00374 <span class="comment">// Right code</span>
<a name="l00375"></a>00375 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *pdata = (<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *)
<a name="l00376"></a>00376 data.c_str();
<a name="l00377"></a>00377 <span class="keywordflow">for</span> (<span class="keywordtype">size_t</span> i = 0; i < size; i += 2)
<a name="l00378"></a>00378 {
<a name="l00379"></a>00379 <a class="code" href="globals_8h.html#a781c2cce7ea2af8192d5f83427044add">unicode_t</a> ch = (pdata[i] << 8) | pdata[i+1];
<a name="l00380"></a>00380 writer.<a class="code" href="class_i_d3___writer.html#a287fd94f06b37fb638029b904e6f1d42" title="Write up to len characters into buf and advance the internal position accordingly...">writeChars</a>((<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>*) &ch, 2);
<a name="l00381"></a>00381 }
<a name="l00382"></a>00382 <span class="comment">// End patch</span>
<a name="l00383"></a>00383 }
<a name="l00384"></a>00384 <span class="keywordflow">return</span> writer.<a class="code" href="class_i_d3___writer.html#ab1e742def0bdb4d9f209537c1eff004e" title="Return the next position that will be written to.">getCur</a>() - beg;
<a name="l00385"></a>00385 }
<a name="l00386"></a>00386
</pre></div></div>
<hr class="footer"/><address style="text-align: right;"><small>Generated on Wed Jan 12 23:46:35 2011 for id3lib by
<a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.3 </small></address>
</body>
</html>
distrib
>
Mageia
>
1
>
i586
>
media
>
core-release
>
by-pkgid
>
1b812d1b0e765bcc0430721ff58676d2
>
files
>
250
