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<hr><h1>src/field_binary.cpp</h1><a href="field__binary_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 <font class="comment">// $Id: field_binary.cpp,v 1.25 2001/08/26 23:33:02 dmazzoni Exp $</font>
00002 
00003 <font class="comment">// id3lib: a C++ library for creating and manipulating id3v1/v2 tags</font>
00004 <font class="comment">// Copyright 1999, 2000  Scott Thomas Haug</font>
00005 
00006 <font class="comment">// This library is free software; you can redistribute it and/or modify it</font>
00007 <font class="comment">// under the terms of the GNU Library General Public License as published by</font>
00008 <font class="comment">// the Free Software Foundation; either version 2 of the License, or (at your</font>
00009 <font class="comment">// option) any later version.</font>
00010 <font class="comment">//</font>
00011 <font class="comment">// This library is distributed in the hope that it will be useful, but WITHOUT</font>
00012 <font class="comment">// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or</font>
00013 <font class="comment">// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public</font>
00014 <font class="comment">// License for more details.</font>
00015 <font class="comment">//</font>
00016 <font class="comment">// You should have received a copy of the GNU Library General Public License</font>
00017 <font class="comment">// along with this library; if not, write to the Free Software Foundation,</font>
00018 <font class="comment">// Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.</font>
00019 
00020 <font class="comment">// The id3lib authors encourage improvements and optimisations to be sent to</font>
00021 <font class="comment">// the id3lib coordinator.  Please see the README file for details on where to</font>
00022 <font class="comment">// send such submissions.  See the AUTHORS file for a list of people who have</font>
00023 <font class="comment">// contributed to id3lib.  See the ChangeLog file for a list of changes to</font>
00024 <font class="comment">// id3lib.  These files are distributed with id3lib at</font>
00025 <font class="comment">// http://download.sourceforge.net/id3lib/</font>
00026 
00027 
00028 <font class="preprocessor">#if defined HAVE_CONFIG_H</font>
00029 <font class="preprocessor"></font><font class="preprocessor">#include &lt;config.h&gt;</font>
00030 <font class="preprocessor">#endif</font>
00031 <font class="preprocessor"></font>
00032 <font class="preprocessor">#include &lt;stdio.h&gt;</font>
00033 <font class="preprocessor">#include &lt;string.h&gt;</font>
00034 <font class="preprocessor">#include &lt;memory.h&gt;</font>
00035 
00036 <font class="preprocessor">#include "<a class="code" href="field__impl_8h.html">field_impl.h</a>"</font>
00037 <font class="preprocessor">#include "<a class="code" href="reader_8h.html">reader.h</a>"</font>
00038 <font class="preprocessor">#include "<a class="code" href="writer_8h.html">writer.h</a>"</font>
00039 <font class="preprocessor">#include "io_helpers.h"</font>
00040 <font class="preprocessor">#include "utils.h"</font>
00041 
00042 <font class="keyword">using</font> <font class="keyword">namespace </font>dami;
00043 
<a name="l00044"></a><a class="code" href="class_i_d3___field_impl.html#a28">00044</a> size_t <a class="code" href="class_i_d3___field_impl.html#a6">ID3_FieldImpl::Set</a>(<font class="keyword">const</font> <a class="code" href="globals_8h.html#a33">uchar</a>* data, size_t len)
00045 {
00046   size_t size = 0;
00047   <font class="keywordflow">if</font> (this-&gt;<a class="code" href="class_i_d3___field_impl.html#a39">GetType</a>() == <a class="code" href="globals_8h.html#a222a188">ID3FTY_BINARY</a>)
00048   {
00049     BString str(data, len);
00050     size = dami::min(len, this-&gt;SetBinary(str));
00051   }
00052   <font class="keywordflow">return</font> size;
00053 }
00054 
<a name="l00060"></a><a class="code" href="class_i_d3___field_impl.html#a34">00060</a> size_t <a class="code" href="class_i_d3___field_impl.html#a34">ID3_FieldImpl::SetBinary</a>(BString data) <font class="comment">//&lt; data to assign to this field.</font>
00061 {
00062   size_t size = 0;
00063   <font class="keywordflow">if</font> (this-&gt;GetType() == <a class="code" href="globals_8h.html#a222a188">ID3FTY_BINARY</a>)
00064   {
00065     this-&gt;Clear();
00066     size_t fixed = _fixed_size;
00067     size = data.size();
00068     <font class="keywordflow">if</font> (fixed == 0)
00069     {
00070       _binary = data;
00071     }
00072     <font class="keywordflow">else</font>
00073     {
00074       _binary.assign(data, 0, dami::min(size, fixed));
00075       <font class="keywordflow">if</font> (size &lt; fixed)
00076       {
00077         _binary.append(fixed - size, <font class="charliteral">'\0'</font>);
00078       }
00079     }
00080     size = _binary.size();
00081     _changed = <font class="keyword">true</font>;
00082   }
00083   <font class="keywordflow">return</font> size;
00084 }
00085 
<a name="l00086"></a><a class="code" href="class_i_d3___field_impl.html#a35">00086</a> BString <a class="code" href="class_i_d3___field_impl.html#a35">ID3_FieldImpl::GetBinary</a>()<font class="keyword"> const</font>
00087 <font class="keyword"></font>{
00088   BString data;
00089   <font class="keywordflow">if</font> (this-&gt;<a class="code" href="class_i_d3___field_impl.html#a39">GetType</a>() == <a class="code" href="globals_8h.html#a222a188">ID3FTY_BINARY</a>)
00090   {
00091     data = _binary;
00092   }
00093   <font class="keywordflow">return</font> data;
00094 }
00095 
00096 
<a name="l00097"></a><a class="code" href="class_i_d3___field_impl.html#a31">00097</a> <font class="keyword">const</font> <a class="code" href="globals_8h.html#a33">uchar</a>* <a class="code" href="class_i_d3___field_impl.html#a31">ID3_FieldImpl::GetRawBinary</a>()<font class="keyword"> const</font>
00098 <font class="keyword"></font>{
00099   <font class="keyword">const</font> <a class="code" href="globals_8h.html#a33">uchar</a>* data = <a class="code" href="globals_8h.html#a24">NULL</a>;
00100   <font class="keywordflow">if</font> (this-&gt;<a class="code" href="class_i_d3___field_impl.html#a39">GetType</a>() == <a class="code" href="globals_8h.html#a222a188">ID3FTY_BINARY</a>)
00101   {
00102     data = _binary.data();
00103   }
00104   <font class="keywordflow">return</font> data;
00105 }
00106 
00107 
<a name="l00118"></a><a class="code" href="class_i_d3___field_impl.html#a30">00118</a> size_t <a class="code" href="class_i_d3___field_impl.html#a7">ID3_FieldImpl::Get</a>(<a class="code" href="globals_8h.html#a33">uchar</a> *buffer,    <font class="comment">//&lt; Destination of retrieved string</font>
00119                           size_t max_bytes <font class="comment">//&lt; Max number of bytes to copy</font>
00120                           )<font class="keyword"> const</font>
00121 <font class="keyword"></font>{
00122   size_t bytes = 0;
00123   <font class="keywordflow">if</font> (this-&gt;<a class="code" href="class_i_d3___field_impl.html#a39">GetType</a>() == <a class="code" href="globals_8h.html#a222a188">ID3FTY_BINARY</a>)
00124   {
00125     bytes = dami::min(max_bytes, this-&gt;Size());
00126     <font class="keywordflow">if</font> (<a class="code" href="globals_8h.html#a24">NULL</a> != buffer &amp;&amp; bytes &gt; 0)
00127     {
00128       ::memcpy(buffer, _binary.data(), bytes);
00129     }
00130   }
00131   <font class="keywordflow">return</font> bytes;
00132 }
00133 
00134 
<a name="l00141"></a><a class="code" href="class_i_d3___field_impl.html#a32">00141</a> <font class="keywordtype">void</font> <a class="code" href="class_i_d3___field_impl.html#a32">ID3_FieldImpl::FromFile</a>(<font class="keyword">const</font> <font class="keywordtype">char</font> *info <font class="comment">//&lt; Source filename</font>
00142                              )
00143 {
00144   <font class="keywordflow">if</font> (this-&gt;<a class="code" href="class_i_d3___field_impl.html#a39">GetType</a>() != <a class="code" href="globals_8h.html#a222a188">ID3FTY_BINARY</a> || <a class="code" href="globals_8h.html#a24">NULL</a> == info)
00145   {
00146     <font class="keywordflow">return</font>;
00147   }
00148     
00149   FILE* temp_file = ::fopen(info, <font class="stringliteral">"rb"</font>);
00150   <font class="keywordflow">if</font> (temp_file != <a class="code" href="globals_8h.html#a24">NULL</a>)
00151   {
00152     ::fseek(temp_file, 0, SEEK_END);
00153     size_t fileSize = ::ftell(temp_file);
00154     ::fseek(temp_file, 0, SEEK_SET);
00155     
00156     <a class="code" href="globals_8h.html#a33">uchar</a>* buffer = <font class="keyword">new</font> <a class="code" href="globals_8h.html#a33">uchar</a>[fileSize];
00157     <font class="keywordflow">if</font> (buffer != <a class="code" href="globals_8h.html#a24">NULL</a>)
00158     {
00159       ::fread(buffer, 1, fileSize, temp_file);
00160       
00161       this-&gt;<a class="code" href="class_i_d3___field_impl.html#a6">Set</a>(buffer, fileSize);
00162       
00163       <font class="keyword">delete</font> [] buffer;
00164     }
00165     
00166     ::fclose(temp_file);
00167   }
00168 }
00169 
00170 
<a name="l00177"></a><a class="code" href="class_i_d3___field_impl.html#a33">00177</a> <font class="keywordtype">void</font> <a class="code" href="class_i_d3___field_impl.html#a33">ID3_FieldImpl::ToFile</a>(<font class="keyword">const</font> <font class="keywordtype">char</font> *info <font class="comment">//&lt; Destination filename</font>
00178                            )<font class="keyword"> const</font>
00179 <font class="keyword"></font>{
00180   <font class="keywordflow">if</font> (this-&gt;<a class="code" href="class_i_d3___field_impl.html#a39">GetType</a>() != <a class="code" href="globals_8h.html#a222a188">ID3FTY_BINARY</a> || <a class="code" href="globals_8h.html#a24">NULL</a> == info)
00181   {
00182     <font class="keywordflow">return</font>;
00183   }
00184     
00185   size_t size = this-&gt;<a class="code" href="class_i_d3___field_impl.html#a2">Size</a>();
00186   <font class="keywordflow">if</font> (size &gt; 0)
00187   {
00188     FILE* temp_file = ::fopen(info, <font class="stringliteral">"wb"</font>);
00189     <font class="keywordflow">if</font> (temp_file != <a class="code" href="globals_8h.html#a24">NULL</a>)
00190     {
00191       ::fwrite(_binary.data(), 1, size, temp_file);
00192       ::fclose(temp_file);
00193     }
00194   }
00195   
00196   <font class="keywordflow">return</font> ;
00197 }
00198 
00199 
<a name="l00200"></a><a class="code" href="class_i_d3___field_impl.html#b5">00200</a> <font class="keywordtype">bool</font> <a class="code" href="class_i_d3___field_impl.html#b5">ID3_FieldImpl::ParseBinary</a>(<a class="code" href="class_i_d3___reader.html">ID3_Reader</a>&amp; reader)
00201 {
00202   <font class="comment">// copy the remaining bytes, unless we're fixed length, in which case copy</font>
00203   <font class="comment">// the minimum of the remaining bytes vs. the fixed length</font>
00204   _binary = io::readAllBinary(reader);
00205   <font class="keywordflow">return</font> <font class="keyword">true</font>;
00206 }
00207 
<a name="l00208"></a><a class="code" href="class_i_d3___field_impl.html#b2">00208</a> <font class="keywordtype">void</font> <a class="code" href="class_i_d3___field_impl.html#b2">ID3_FieldImpl::RenderBinary</a>(<a class="code" href="class_i_d3___writer.html">ID3_Writer</a>&amp; writer)<font class="keyword"> const</font>
00209 <font class="keyword"></font>{
00210   writer.<a class="code" href="class_i_d3___writer.html#a8">writeChars</a>(this-&gt;GetRawBinary(), this-&gt;<a class="code" href="class_i_d3___field_impl.html#a2">Size</a>());
00211 }
00212 
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