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<hr><h1>src/tag_parse_v1.cpp</h1><a href="tag__parse__v1_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 <font class="comment">// $Id: tag_parse_v1.cpp,v 1.19 2001/12/16 11:44:24 shadrack 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 <font class="preprocessor">#include "<a class="code" href="tag__impl_8h.html">tag_impl.h</a>"</font>
00033 <font class="preprocessor">#include "helpers.h"</font>
00034 <font class="preprocessor">#include "utils.h"</font>
00035 <font class="preprocessor">#include "io_decorators.h"</font>
00036 <font class="preprocessor">#include "io_helpers.h"</font>
00037 <font class="preprocessor">#include "io_strings.h"</font>
00038
00039 <font class="keyword">using</font> <font class="keyword">namespace </font>dami;
00040
00041 <font class="keywordtype">bool</font> id3::v1::parse(<a class="code" href="class_i_d3___tag_impl.html">ID3_TagImpl</a>& tag, <a class="code" href="class_i_d3___reader.html">ID3_Reader</a>& reader)
00042 {
00043 io::ExitTrigger et(reader);
00044
00045 <a class="code" href="class_i_d3___reader.html#s2">ID3_Reader::pos_type</a> <a class="code" href="class_i_d3___tag_impl.html#a35">end</a> = reader.<a class="code" href="class_i_d3___reader.html#a3">getCur</a>();
00046 <font class="comment">// posn ourselves at 128 bytes from the current position</font>
00047 <font class="keywordflow">if</font> (<a class="code" href="class_i_d3___tag_impl.html#a35">end</a> < reader.<a class="code" href="class_i_d3___reader.html#a1">getBeg</a>() + <a class="code" href="globals_8h.html#a220a173">ID3_V1_LEN</a>)
00048 {
00049 ID3D_NOTICE( <font class="stringliteral">"id3::v1::parse: not enough bytes to parse, pos = "</font> << <a class="code" href="class_i_d3___tag_impl.html#a35">end</a> );
00050 <font class="keywordflow">return</font> <font class="keyword">false</font>;
00051 }
00052 reader.<a class="code" href="class_i_d3___reader.html#a4">setCur</a>(<a class="code" href="class_i_d3___tag_impl.html#a35">end</a> - <a class="code" href="globals_8h.html#a220a173">ID3_V1_LEN</a>);
00053 <a class="code" href="class_i_d3___reader.html#s2">ID3_Reader::pos_type</a> beg = reader.<a class="code" href="class_i_d3___reader.html#a3">getCur</a>();
00054 <font class="comment">//file.seekg(-static_cast<long>(ID3_V1_LEN), ios::cur);</font>
00055 <font class="keywordflow">if</font> (<a class="code" href="class_i_d3___tag_impl.html#a35">end</a> != beg + <a class="code" href="globals_8h.html#a220a173">ID3_V1_LEN</a>)
00056 {
00057 ID3D_WARNING( <font class="stringliteral">"id3::v1::parse: failed to reposition "</font> << <a class="code" href="globals_8h.html#a220a173">ID3_V1_LEN</a> <<
00058 <font class="stringliteral">" bytes"</font> );
00059 <font class="keywordflow">return</font> <font class="keyword">false</font>;
00060 }
00061
00062 <font class="comment">// read the next 128 bytes in;</font>
00063 String id = io::readText(reader, <a class="code" href="globals_8h.html#a220a174">ID3_V1_LEN_ID</a>);
00064
00065 <font class="comment">// check to see if it was a tag</font>
00066 <font class="keywordflow">if</font> (id != <font class="stringliteral">"TAG"</font>)
00067 {
00068 <font class="keywordflow">return</font> <font class="keyword">false</font>;
00069 }
00070 et.setExitPos(beg);
00071
00072 <font class="comment">// guess so, let's start checking the v2 tag for frames which are the</font>
00073 <font class="comment">// equivalent of the v1 fields. When we come across a v1 field that has</font>
00074 <font class="comment">// no current equivalent v2 frame, we create the frame, copy the data</font>
00075 <font class="comment">// from the v1 frame and attach it to the tag</font>
00076
00077 <font class="comment">// (Scott Wheeler) The above comment was nice in theory, but it wasn't</font>
00078 <font class="comment">// first checking (before my hacks) to see if there already was v2 data.</font>
00079
00080 ID3D_NOTICE(<font class="stringliteral">"id3::v1::parse: read bytes: "</font> << reader.<a class="code" href="class_i_d3___reader.html#a3">getCur</a>() - beg);
00081 String title = io::readTrailingSpaces(reader, <a class="code" href="globals_8h.html#a220a175">ID3_V1_LEN_TITLE</a>);
00082 <font class="keywordflow">if</font> (title.size() > 0 && !id3::v2::hasTitle(tag))
00083 {
00084 id3::v2::setTitle(tag, title);
00085 }
00086 ID3D_NOTICE( <font class="stringliteral">"id3::v1::parse: title = \""</font> << title << <font class="stringliteral">"\""</font> );
00087
00088 ID3D_NOTICE(<font class="stringliteral">"id3::v1::parse: read bytes: "</font> << reader.<a class="code" href="class_i_d3___reader.html#a3">getCur</a>() - beg);
00089 String artist = io::readTrailingSpaces(reader, <a class="code" href="globals_8h.html#a220a176">ID3_V1_LEN_ARTIST</a>);
00090 <font class="keywordflow">if</font> (artist.size() > 0 && !id3::v2::hasArtist(tag))
00091 {
00092 id3::v2::setArtist(tag, artist);
00093 }
00094 ID3D_NOTICE( <font class="stringliteral">"id3::v1::parse: artist = \""</font> << artist << <font class="stringliteral">"\""</font> );
00095
00096 ID3D_NOTICE(<font class="stringliteral">"id3::v1::parse: read bytes: "</font> << reader.<a class="code" href="class_i_d3___reader.html#a3">getCur</a>() - beg);
00097 String album = io::readTrailingSpaces(reader, <a class="code" href="globals_8h.html#a220a177">ID3_V1_LEN_ALBUM</a>);
00098 <font class="keywordflow">if</font> (album.size() > 0 && !id3::v2::hasAlbum(tag))
00099 {
00100 id3::v2::setAlbum(tag, album);
00101 }
00102 ID3D_NOTICE( <font class="stringliteral">"id3::v1::parse: album = \""</font> << title << <font class="stringliteral">"\""</font> );
00103
00104 ID3D_NOTICE(<font class="stringliteral">"id3::v1::parse: read bytes: "</font> << reader.<a class="code" href="class_i_d3___reader.html#a3">getCur</a>() - beg);
00105 String year = io::readTrailingSpaces(reader, <a class="code" href="globals_8h.html#a220a178">ID3_V1_LEN_YEAR</a>);
00106 <font class="keywordflow">if</font> (year.size() > 0 && !id3::v2::hasYear(tag))
00107 {
00108 id3::v2::setYear(tag, year);
00109 }
00110 ID3D_NOTICE( <font class="stringliteral">"id3::v1::parse: year = \""</font> << year << <font class="stringliteral">"\""</font> );
00111
00112 ID3D_NOTICE(<font class="stringliteral">"id3::v1::parse: read bytes: "</font> << reader.<a class="code" href="class_i_d3___reader.html#a3">getCur</a>() - beg);
00113 String comment = io::readTrailingSpaces(reader, <a class="code" href="globals_8h.html#a220a179">ID3_V1_LEN_COMMENT</a>);
00114 <font class="keywordflow">if</font> (comment.length() == <a class="code" href="globals_8h.html#a220a179">ID3_V1_LEN_COMMENT</a> &&
00115 <font class="charliteral">'\0'</font> == comment[<a class="code" href="globals_8h.html#a220a179">ID3_V1_LEN_COMMENT</a> - 2] ||
00116 <font class="charliteral">'\0'</font> != comment[<a class="code" href="globals_8h.html#a220a179">ID3_V1_LEN_COMMENT</a> - 1])
00117 {
00118 <font class="comment">// This is an id3v1.1 tag. The last byte of the comment is the track</font>
00119 <font class="comment">// number. </font>
00120 size_t track = comment[<a class="code" href="globals_8h.html#a220a179">ID3_V1_LEN_COMMENT</a> - 1];
00121 <font class="keywordflow">if</font> (track > 0 && !id3::v2::hasTrack(tag))
00122 {
00123 id3::v2::setTrack(tag, track, 0);
00124 }
00125 ID3D_NOTICE( <font class="stringliteral">"id3::v1::parse: track = \""</font> << track << <font class="stringliteral">"\""</font> );
00126
00127 ID3D_NOTICE( <font class="stringliteral">"id3::v1::parse: comment length = \""</font> << comment.length() << <font class="stringliteral">"\""</font> );
00128 io::StringReader sr(comment);
00129 comment = io::readTrailingSpaces(sr, <a class="code" href="globals_8h.html#a220a179">ID3_V1_LEN_COMMENT</a> - 2);
00130 }
00131 ID3D_NOTICE( <font class="stringliteral">"id3::v1::parse: comment = \""</font> << comment << <font class="stringliteral">"\""</font> );
00132 <font class="keywordflow">if</font> (comment.size() > 0)
00133 {
00134 id3::v2::setComment(tag, comment, <a class="code" href="globals_8h.html#a6">STR_V1_COMMENT_DESC</a>, <font class="stringliteral">"XXX"</font>);
00135 }
00136
00137 ID3D_NOTICE(<font class="stringliteral">"id3::v1::parse: read bytes: "</font> << reader.<a class="code" href="class_i_d3___reader.html#a3">getCur</a>() - beg);
00138 <font class="comment">// the GENRE field/frame</font>
00139 <a class="code" href="globals_8h.html#a33">uchar</a> genre = reader.<a class="code" href="class_i_d3___reader.html#a5">readChar</a>();
00140 <font class="keywordflow">if</font> (genre != 0xFF && !id3::v2::hasGenre(tag))
00141 {
00142 id3::v2::setGenre(tag, genre);
00143 }
00144 ID3D_NOTICE( <font class="stringliteral">"id3::v1::parse: genre = \""</font> << (<font class="keywordtype">int</font>) genre << <font class="stringliteral">"\""</font> );
00145
00146 ID3D_NOTICE(<font class="stringliteral">"id3::v1::parse: read bytes: "</font> << reader.<a class="code" href="class_i_d3___reader.html#a3">getCur</a>() - beg);
00147 <font class="keywordflow">return</font> <font class="keyword">true</font>;
00148 }
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