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<hr><h1>src/tag_impl.cpp</h1><a href="tag__impl_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 <font class="comment">// $Id: tag_impl.cpp,v 1.8 2000/10/29 01:37:29 eldamitri 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 <font class="preprocessor">#if defined HAVE_CONFIG_H</font>
00028 <font class="preprocessor"></font><font class="preprocessor">#include <config.h></font>
00029 <font class="preprocessor">#endif</font>
00030 <font class="preprocessor"></font>
00031
00032
00033 <font class="preprocessor">#if defined HAVE_SYS_PARAM_H</font>
00034 <font class="preprocessor"></font><font class="preprocessor">#include <sys/param.h></font>
00035 <font class="preprocessor">#endif</font>
00036 <font class="preprocessor"></font>
00037 <font class="preprocessor">#include <string.h></font>
00038
00039 <font class="preprocessor">#include "<a class="code" href="tag__impl_8h.html">tag_impl.h</a>"</font>
00040 <font class="preprocessor">#include "utils.h"</font>
00041 <font class="preprocessor">#include "io_helpers.h"</font>
00042 <font class="preprocessor">#include "io_strings.h"</font>
00043
00044 <font class="keyword">using</font> <font class="keyword">namespace </font>dami;
00045
<a name="l00046"></a><a class="code" href="class_i_d3___tag_impl.html#d0">00046</a> size_t <a class="code" href="class_i_d3___tag_impl.html#d0">ID3_TagImpl::IsV2Tag</a>(<a class="code" href="class_i_d3___reader.html">ID3_Reader</a>& reader)
00047 {
00048 io::ExitTrigger et(reader);
00049 size_t tagSize = 0;
00050 String id = io::readText(reader, <a class="code" href="class_i_d3___tag_header.html#s10s3">ID3_TagHeader::ID_SIZE</a>);
00051 String ver = io::readText(reader, 2);
00052 <font class="keywordtype">char</font> flags = reader.<a class="code" href="class_i_d3___reader.html#a5">readChar</a>();
00053 String size = io::readText(reader, 4);
00054
00055 <font class="keywordflow">if</font> (id == <a class="code" href="class_i_d3___tag_header.html#p0">ID3_TagHeader::ID</a> &&
00056 (uchar) ver [0] < 0xFF && (uchar) ver [1] < 0xFF &&
00057 (uchar) size[0] < 0x80 && (uchar) size[1] < 0x80 &&
00058 (uchar) size[2] < 0x80 && (uchar) size[3] < 0x80)
00059 {
00060 io::StringReader sr(size);
00061 tagSize = io::readUInt28(sr) + <a class="code" href="class_i_d3___tag_header.html#s10s8">ID3_TagHeader::SIZE</a>;
00062 }
00063 <font class="keywordflow">else</font> <font class="keywordflow">if</font> (id != <a class="code" href="class_i_d3___tag_header.html#p0">ID3_TagHeader::ID</a>)
00064 {
00065 <font class="comment">// clog << "*** IsV2Tag: Not an id3v2 tag header" << endl;</font>
00066 }
00067 <font class="keywordflow">else</font> <font class="keywordflow">if</font> ((uchar)ver[0] >= 0xFF)
00068 {
00069 <font class="comment">// clog << "*** IsV2Tag: Major offset" << endl;</font>
00070 }
00071 <font class="keywordflow">else</font> <font class="keywordflow">if</font> ((uchar)ver[1] >= 0xFF)
00072 {
00073 <font class="comment">// clog << "*** ISV2Tag: Minor offset" << endl;</font>
00074 }
00075 <font class="keywordflow">else</font> <font class="keywordflow">if</font> ((uchar)size[0] >= 0x80)
00076 {
00077 <font class="comment">// clog << "*** ISV2Tag: 1st size offset" << endl;</font>
00078 }
00079 <font class="keywordflow">else</font> <font class="keywordflow">if</font> ((uchar)size[1] >= 0x80)
00080 {
00081 <font class="comment">// clog << "*** ISV2Tag: 2nd size offset" << endl;</font>
00082 }
00083 <font class="keywordflow">else</font> <font class="keywordflow">if</font> ((uchar)size[2] >= 0x80)
00084 {
00085 <font class="comment">// clog << "*** ISV2Tag: 3rd size offset" << endl;</font>
00086 }
00087 <font class="keywordflow">else</font> <font class="keywordflow">if</font> ((uchar)size[3] >= 0x80)
00088 {
00089 <font class="comment">// clog << "*** ISV2Tag: 4th size offset" << endl;</font>
00090 }
00091 <font class="keywordflow">else</font>
00092 {
00093 <font class="comment">// clog << "*** shouldn't get here!" << endl;</font>
00094 }
00095
00096 <font class="keywordflow">return</font> tagSize;
00097 }
00098
<a name="l00099"></a><a class="code" href="class_i_d3___tag_impl.html#a0">00099</a> <a class="code" href="class_i_d3___tag_impl.html#a0">ID3_TagImpl::ID3_TagImpl</a>(<font class="keyword">const</font> <font class="keywordtype">char</font> *name)
00100 : _frames(),
00101 _cursor(_frames.begin()),
00102 _file_name(),
00103 _file_size(0),
00104 _prepended_bytes(0),
00105 _appended_bytes(0),
00106 _is_file_writable(false)
00107 {
00108 this-><a class="code" href="class_i_d3___tag_impl.html#a3">Clear</a>();
00109 <font class="keywordflow">if</font> (name)
00110 {
00111 this-><a class="code" href="class_i_d3___tag_impl.html#a18">Link</a>(name);
00112 }
00113 }
00114
<a name="l00115"></a><a class="code" href="class_i_d3___tag_impl.html#a1">00115</a> <a class="code" href="class_i_d3___tag_impl.html#a0">ID3_TagImpl::ID3_TagImpl</a>(<font class="keyword">const</font> <a class="code" href="class_i_d3___tag.html">ID3_Tag</a> &tag)
00116 : _frames(),
00117 _cursor(_frames.begin()),
00118 _file_name(),
00119 _file_size(0),
00120 _prepended_bytes(0),
00121 _appended_bytes(0),
00122 _is_file_writable(false)
00123 {
00124 *<font class="keyword">this</font> = tag;
00125 }
00126
<a name="l00127"></a><a class="code" href="class_i_d3___tag_impl.html#a2">00127</a> <a class="code" href="class_i_d3___tag_impl.html#a2">ID3_TagImpl::~ID3_TagImpl</a>()
00128 {
00129 this-><a class="code" href="class_i_d3___tag_impl.html#a3">Clear</a>();
00130 }
00131
<a name="l00132"></a><a class="code" href="class_i_d3___tag_impl.html#a3">00132</a> <font class="keywordtype">void</font> <a class="code" href="class_i_d3___tag_impl.html#a3">ID3_TagImpl::Clear</a>()
00133 {
00134 <font class="keywordflow">for</font> (<a class="code" href="class_i_d3___tag_impl.html#s0">iterator</a> cur = _frames.begin(); cur != _frames.end(); ++cur)
00135 {
00136 <font class="keywordflow">if</font> (*cur)
00137 {
00138 <font class="keyword">delete</font> *cur;
00139 *cur = <a class="code" href="globals_8h.html#a24">NULL</a>;
00140 }
00141 }
00142 _frames.clear();
00143 _cursor = _frames.begin();
00144 _is_padded = <font class="keyword">true</font>;
00145
00146 _hdr.<a class="code" href="class_i_d3___header.html#a6">Clear</a>();
00147 _hdr.<a class="code" href="class_i_d3___tag_header.html#a3">SetSpec</a>(<a class="code" href="globals_8h.html#a216a58">ID3V2_LATEST</a>);
00148
00149 _tags_to_parse.<a class="code" href="class_i_d3___flags.html#a7">clear</a>();
00150
00151 _changed = <font class="keyword">true</font>;
00152 }
00153
00154
<a name="l00155"></a><a class="code" href="class_i_d3___tag_impl.html#a14">00155</a> <font class="keywordtype">void</font> <a class="code" href="class_i_d3___tag_impl.html#a14">ID3_TagImpl::AddFrame</a>(<font class="keyword">const</font> <a class="code" href="class_i_d3___frame.html">ID3_Frame</a>& frame)
00156 {
00157 this-><a class="code" href="class_i_d3___tag_impl.html#a14">AddFrame</a>(&frame);
00158 }
00159
<a name="l00160"></a><a class="code" href="class_i_d3___tag_impl.html#a15">00160</a> <font class="keywordtype">void</font> <a class="code" href="class_i_d3___tag_impl.html#a14">ID3_TagImpl::AddFrame</a>(<font class="keyword">const</font> <a class="code" href="class_i_d3___frame.html">ID3_Frame</a>* frame)
00161 {
00162 <font class="keywordflow">if</font> (frame)
00163 {
00164 <a class="code" href="class_i_d3___frame.html">ID3_Frame</a>* frm = <font class="keyword">new</font> <a class="code" href="class_i_d3___frame.html">ID3_Frame</a>(*frame);
00165 this-><a class="code" href="class_i_d3___tag_impl.html#a16">AttachFrame</a>(frm);
00166 }
00167 }
00168
<a name="l00169"></a><a class="code" href="class_i_d3___tag_impl.html#a16">00169</a> <font class="keywordtype">void</font> <a class="code" href="class_i_d3___tag_impl.html#a16">ID3_TagImpl::AttachFrame</a>(<a class="code" href="class_i_d3___frame.html">ID3_Frame</a> *frame)
00170 {
00171
00172 <font class="keywordflow">if</font> (<a class="code" href="globals_8h.html#a24">NULL</a> == frame)
00173 {
00174 <font class="comment">// log this</font>
00175 <font class="keywordflow">return</font>;
00176 <font class="comment">//ID3_THROW(ID3E_NoData);</font>
00177 }
00178
00179 _frames.push_back(frame);
00180 _cursor = _frames.begin();
00181
00182 _changed = <font class="keyword">true</font>;
00183 }
00184
00185
<a name="l00186"></a><a class="code" href="class_i_d3___tag_impl.html#a17">00186</a> <a class="code" href="class_i_d3___frame.html">ID3_Frame</a>* <a class="code" href="class_i_d3___tag_impl.html#a17">ID3_TagImpl::RemoveFrame</a>(<font class="keyword">const</font> <a class="code" href="class_i_d3___frame.html">ID3_Frame</a> *frame)
00187 {
00188 <a class="code" href="class_i_d3___frame.html">ID3_Frame</a> *frm = <a class="code" href="globals_8h.html#a24">NULL</a>;
00189
00190 <a class="code" href="class_i_d3___tag_impl.html#s0">iterator</a> fi = <a class="code" href="class_i_d3___tag_impl.html#a25">Find</a>(frame);
00191 <font class="keywordflow">if</font> (fi != _frames.end())
00192 {
00193 frm = *fi;
00194 _frames.erase(fi);
00195 _cursor = _frames.begin();
00196 _changed = <font class="keyword">true</font>;
00197 }
00198
00199 <font class="keywordflow">return</font> frm;
00200 }
00201
00202
<a name="l00203"></a><a class="code" href="class_i_d3___tag_impl.html#a4">00203</a> <font class="keywordtype">bool</font> <a class="code" href="class_i_d3___tag_impl.html#a4">ID3_TagImpl::HasChanged</a>()<font class="keyword"> const</font>
00204 <font class="keyword"></font>{
00205 <font class="keywordtype">bool</font> changed = _changed;
00206
00207 <font class="keywordflow">if</font> (! changed)
00208 {
00209 <font class="keywordflow">for</font> (<a class="code" href="class_i_d3___tag_impl.html#s1">const_iterator</a> fi = _frames.begin(); fi != _frames.end(); ++fi)
00210 {
00211 <font class="keywordflow">if</font> (*fi)
00212 {
00213 changed = (*fi)->HasChanged();
00214 }
00215
00216 <font class="keywordflow">if</font> (changed)
00217 {
00218 <font class="keywordflow">break</font>;
00219 }
00220 }
00221 }
00222
00223 <font class="keywordflow">return</font> changed;
00224 }
00225
<a name="l00226"></a><a class="code" href="class_i_d3___tag_impl.html#a33">00226</a> <font class="keywordtype">bool</font> <a class="code" href="class_i_d3___tag_impl.html#a33">ID3_TagImpl::SetSpec</a>(<a class="code" href="globals_8h.html#a216">ID3_V2Spec</a> spec)
00227 {
00228 <font class="keywordtype">bool</font> changed = _hdr.<a class="code" href="class_i_d3___tag_header.html#a3">SetSpec</a>(spec);
00229 _changed = _changed || changed;
00230 <font class="keywordflow">return</font> changed;
00231 }
00232
<a name="l00233"></a><a class="code" href="class_i_d3___tag_impl.html#a32">00233</a> <a class="code" href="globals_8h.html#a216">ID3_V2Spec</a> <a class="code" href="class_i_d3___tag_impl.html#a32">ID3_TagImpl::GetSpec</a>()<font class="keyword"> const</font>
00234 <font class="keyword"></font>{
00235 <font class="keywordflow">return</font> _hdr.<a class="code" href="class_i_d3___header.html#a3">GetSpec</a>();
00236 }
00237
<a name="l00238"></a><a class="code" href="class_i_d3___tag_impl.html#a7">00238</a> <font class="keywordtype">bool</font> <a class="code" href="class_i_d3___tag_impl.html#a7">ID3_TagImpl::SetUnsync</a>(<font class="keywordtype">bool</font> b)
00239 {
00240 <font class="keywordtype">bool</font> changed = _hdr.<a class="code" href="class_i_d3___tag_header.html#a8">SetUnsync</a>(b);
00241 _changed = changed || _changed;
00242 <font class="keywordflow">return</font> changed;
00243 }
00244
<a name="l00245"></a><a class="code" href="class_i_d3___tag_impl.html#a8">00245</a> <font class="keywordtype">bool</font> <a class="code" href="class_i_d3___tag_impl.html#a8">ID3_TagImpl::SetExtended</a>(<font class="keywordtype">bool</font> ext)
00246 {
00247 <font class="keywordtype">bool</font> changed = _hdr.<a class="code" href="class_i_d3___tag_header.html#a10">SetExtended</a>(ext);
00248 _changed = changed || _changed;
00249 <font class="keywordflow">return</font> changed;
00250 }
00251
<a name="l00252"></a><a class="code" href="class_i_d3___tag_impl.html#a9">00252</a> <font class="keywordtype">bool</font> <a class="code" href="class_i_d3___tag_impl.html#a9">ID3_TagImpl::SetExperimental</a>(<font class="keywordtype">bool</font> exp)
00253 {
00254 <font class="keywordtype">bool</font> changed = _hdr.<a class="code" href="class_i_d3___tag_header.html#a12">SetExperimental</a>(exp);
00255 _changed = changed || _changed;
00256 <font class="keywordflow">return</font> changed;
00257 }
00258
<a name="l00259"></a><a class="code" href="class_i_d3___tag_impl.html#a11">00259</a> <font class="keywordtype">bool</font> <a class="code" href="class_i_d3___tag_impl.html#a11">ID3_TagImpl::GetUnsync</a>()<font class="keyword"> const</font>
00260 <font class="keyword"></font>{
00261 <font class="keywordflow">return</font> _hdr.<a class="code" href="class_i_d3___tag_header.html#a9">GetUnsync</a>();
00262 }
00263
<a name="l00264"></a><a class="code" href="class_i_d3___tag_impl.html#a12">00264</a> <font class="keywordtype">bool</font> <a class="code" href="class_i_d3___tag_impl.html#a12">ID3_TagImpl::GetExtended</a>()<font class="keyword"> const</font>
00265 <font class="keyword"></font>{
00266 <font class="keywordflow">return</font> _hdr.<a class="code" href="class_i_d3___tag_header.html#a11">GetExtended</a>();
00267 }
00268
<a name="l00269"></a><a class="code" href="class_i_d3___tag_impl.html#a13">00269</a> <font class="keywordtype">bool</font> <a class="code" href="class_i_d3___tag_impl.html#a13">ID3_TagImpl::GetExperimental</a>()<font class="keyword"> const</font>
00270 <font class="keyword"></font>{
00271 <font class="keywordflow">return</font> _hdr.<a class="code" href="class_i_d3___tag_header.html#a13">GetExperimental</a>();
00272 }
00273
<a name="l00274"></a><a class="code" href="class_i_d3___tag_impl.html#a10">00274</a> <font class="keywordtype">bool</font> <a class="code" href="class_i_d3___tag_impl.html#a10">ID3_TagImpl::SetPadding</a>(<font class="keywordtype">bool</font> pad)
00275 {
00276 <font class="keywordtype">bool</font> changed = (_is_padded != pad);
00277 _changed = changed || _changed;
00278 <font class="keywordflow">if</font> (changed)
00279 {
00280 _is_padded = pad;
00281 }
00282
00283 <font class="keywordflow">return</font> changed;
00284 }
00285
00286
00287 <a class="code" href="class_i_d3___tag_impl.html">ID3_TagImpl</a> &
<a name="l00288"></a><a class="code" href="class_i_d3___tag_impl.html#a30">00288</a> <a class="code" href="class_i_d3___tag_impl.html#a30">ID3_TagImpl::operator=</a>( <font class="keyword">const</font> <a class="code" href="class_i_d3___tag.html">ID3_Tag</a> &rTag )
00289 {
00290 this-><a class="code" href="class_i_d3___tag_impl.html#a3">Clear</a>();
00291
00292 this-><a class="code" href="class_i_d3___tag_impl.html#a7">SetUnsync</a>(rTag.<a class="code" href="class_i_d3___tag.html#a9">GetUnsync</a>());
00293 this-><a class="code" href="class_i_d3___tag_impl.html#a8">SetExtended</a>(rTag.<a class="code" href="class_i_d3___tag.html#a10">GetExtendedHeader</a>());
00294 this-><a class="code" href="class_i_d3___tag_impl.html#a9">SetExperimental</a>(rTag.<a class="code" href="class_i_d3___tag.html#a11">GetExperimental</a>());
00295
00296 <a class="code" href="class_i_d3___tag_1_1_const_iterator.html">ID3_Tag::ConstIterator</a>* iter = rTag.<a class="code" href="class_i_d3___tag.html#a33">CreateIterator</a>();
00297 <font class="keyword">const</font> <a class="code" href="class_i_d3___frame.html">ID3_Frame</a>* frame = <a class="code" href="globals_8h.html#a24">NULL</a>;
00298 <font class="keywordflow">while</font> (NULL != (frame = iter-><a class="code" href="class_i_d3___tag_1_1_const_iterator.html#a0">GetNext</a>()))
00299 {
00300 this-><a class="code" href="class_i_d3___tag_impl.html#a16">AttachFrame</a>(<font class="keyword">new</font> <a class="code" href="class_i_d3___frame.html">ID3_Frame</a>(*frame));
00301 }
00302 <font class="keyword">delete</font> iter;
00303 <font class="keywordflow">return</font> *<font class="keyword">this</font>;
00304 }
00305
<a name="l00306"></a><a class="code" href="tag__impl_8cpp.html#a0">00306</a> size_t <a class="code" href="tag__impl_8h.html#a0">ID3_GetDataSize</a>(<font class="keyword">const</font> <a class="code" href="class_i_d3___tag_impl.html">ID3_TagImpl</a>& tag)
00307 {
00308 <font class="keywordflow">return</font> tag.<a class="code" href="class_i_d3___tag_impl.html#a23">GetFileSize</a>() - tag.<a class="code" href="class_i_d3___tag_impl.html#a21">GetPrependedBytes</a>() - tag.<a class="code" href="class_i_d3___tag_impl.html#a22">GetAppendedBytes</a>();
00309 }
00310
</pre></div><hr><address><small>Generated on Thu Jan 3 07:35:56 2002 for id3lib by
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<img src="doxygen.gif" alt="doxygen" align="middle" border=0
width=110 height=53></a>1.2.12 written by <a href="mailto:dimitri@stack.nl">Dimitri van Heesch</a>,
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