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<hr><h1>include/id3/readers.h</h1><a href="readers_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 <font class="comment">// -*- C++ -*-</font>
00002 <font class="comment">// $Id: readers.h,v 1.10 2001/08/26 23:33:23 dmazzoni Exp $</font>
00003
00004 <font class="comment">// id3lib: a software library for creating and manipulating id3v1/v2 tags</font>
00005 <font class="comment">// Copyright 1999, 2000 Scott Thomas Haug</font>
00006
00007 <font class="comment">// This library is free software; you can redistribute it and/or modify it</font>
00008 <font class="comment">// under the terms of the GNU Library General Public License as published by</font>
00009 <font class="comment">// the Free Software Foundation; either version 2 of the License, or (at your</font>
00010 <font class="comment">// option) any later version.</font>
00011 <font class="comment">//</font>
00012 <font class="comment">// This library is distributed in the hope that it will be useful, but WITHOUT</font>
00013 <font class="comment">// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or</font>
00014 <font class="comment">// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public</font>
00015 <font class="comment">// License for more details.</font>
00016 <font class="comment">//</font>
00017 <font class="comment">// You should have received a copy of the GNU Library General Public License</font>
00018 <font class="comment">// along with this library; if not, write to the Free Software Foundation,</font>
00019 <font class="comment">// Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.</font>
00020
00021 <font class="comment">// The id3lib authors encourage improvements and optimisations to be sent to</font>
00022 <font class="comment">// the id3lib coordinator. Please see the README file for details on where to</font>
00023 <font class="comment">// send such submissions. See the AUTHORS file for a list of people who have</font>
00024 <font class="comment">// contributed to id3lib. See the ChangeLog file for a list of changes to</font>
00025 <font class="comment">// id3lib. These files are distributed with id3lib at</font>
00026 <font class="comment">// http://download.sourceforge.net/id3lib/</font>
00027
00028 <font class="preprocessor">#ifndef _ID3LIB_READERS_H_</font>
00029 <font class="preprocessor"></font><font class="preprocessor">#define _ID3LIB_READERS_H_</font>
00030 <font class="preprocessor"></font>
00031 <font class="preprocessor">#include <fstream.h></font>
00032 <font class="preprocessor">#include <iostream.h></font>
00033 <font class="preprocessor">#include <<a class="code" href="reader_8h.html">id3/reader.h</a>></font>
00034
<a name="l00035"></a><a class="code" href="class_i_d3___i_stream_reader.html">00035</a> <font class="keyword">class </font><a class="code" href="globals_8h.html#a1">ID3_CPP_EXPORT</a> <a class="code" href="class_i_d3___i_stream_reader.html">ID3_IStreamReader</a> : <font class="keyword">public</font> <a class="code" href="class_i_d3___reader.html">ID3_Reader</a>
00036 {
00037 istream& _stream;
00038 <font class="keyword">protected</font>:
<a name="l00039"></a><a class="code" href="class_i_d3___i_stream_reader.html#b0">00039</a> istream& getReader()<font class="keyword"> const </font>{ <font class="keywordflow">return</font> _stream; }
00040 <font class="keyword">public</font>:
<a name="l00041"></a><a class="code" href="class_i_d3___i_stream_reader.html#a0">00041</a> <a class="code" href="class_i_d3___i_stream_reader.html">ID3_IStreamReader</a>(istream& reader) : _stream(reader) { ; }
<a name="l00042"></a><a class="code" href="class_i_d3___i_stream_reader.html#a1">00042</a> <font class="keyword">virtual</font> ~<a class="code" href="class_i_d3___i_stream_reader.html">ID3_IStreamReader</a>() { ; }
<a name="l00043"></a><a class="code" href="class_i_d3___i_stream_reader.html#a2">00043</a> <font class="keyword">virtual</font> <font class="keywordtype">void</font> <a class="code" href="class_i_d3___reader.html#a0">close</a>() { ; }
00044
<a name="l00045"></a><a class="code" href="class_i_d3___i_stream_reader.html#a3">00045</a> <font class="keyword">virtual</font> int_type <a class="code" href="class_i_d3___reader.html#a6">peekChar</a>() { <font class="keywordflow">return</font> _stream.peek(); }
00046
<a name="l00050"></a><a class="code" href="class_i_d3___i_stream_reader.html#a4">00050</a> <font class="keyword">virtual</font> size_type <a class="code" href="class_i_d3___reader.html#a7">readChars</a>(<font class="keywordtype">char</font> buf[], size_type len)
00051 {
00052 <font class="keywordflow">return</font> this-><a class="code" href="class_i_d3___reader.html#a7">readChars</a>(reinterpret_cast<uchar *>(buf), len);
00053 }
<a name="l00054"></a><a class="code" href="class_i_d3___i_stream_reader.html#a5">00054</a> <font class="keyword">virtual</font> size_type <a class="code" href="class_i_d3___reader.html#a7">readChars</a>(char_type buf[], size_type len)
00055 {
00056 _stream.read((<font class="keywordtype">char</font> *)buf, len);
00057 <font class="keywordflow">return</font> _stream.gcount();
00058 }
00059
<a name="l00060"></a><a class="code" href="class_i_d3___i_stream_reader.html#a6">00060</a> <font class="keyword">virtual</font> pos_type <a class="code" href="class_i_d3___reader.html#a1">getBeg</a>() { <font class="keywordflow">return</font> 0; }
<a name="l00061"></a><a class="code" href="class_i_d3___i_stream_reader.html#a7">00061</a> <font class="keyword">virtual</font> pos_type <a class="code" href="class_i_d3___reader.html#a3">getCur</a>() { <font class="keywordflow">return</font> _stream.tellg(); }
<a name="l00062"></a><a class="code" href="class_i_d3___i_stream_reader.html#a8">00062</a> <font class="keyword">virtual</font> pos_type <a class="code" href="class_i_d3___reader.html#a2">getEnd</a>()
00063 {
00064 pos_type cur = this-><a class="code" href="class_i_d3___reader.html#a3">getCur</a>();
00065 _stream.seekg(0, ios::end);
00066 pos_type end = this-><a class="code" href="class_i_d3___reader.html#a3">getCur</a>();
00067 this-><a class="code" href="class_i_d3___reader.html#a4">setCur</a>(cur);
00068 <font class="keywordflow">return</font> end;
00069 }
00070
<a name="l00073"></a><a class="code" href="class_i_d3___i_stream_reader.html#a9">00073</a> <font class="keyword">virtual</font> pos_type <a class="code" href="class_i_d3___reader.html#a4">setCur</a>(pos_type pos) { _stream.seekg(pos); <font class="keywordflow">return</font> pos; }
00074 };
00075
<a name="l00076"></a><a class="code" href="class_i_d3___i_f_stream_reader.html">00076</a> <font class="keyword">class </font><a class="code" href="globals_8h.html#a1">ID3_CPP_EXPORT</a> ID3_IFStreamReader : <font class="keyword">public</font> <a class="code" href="class_i_d3___i_stream_reader.html">ID3_IStreamReader</a>
00077 {
00078 ifstream& _file;
00079 <font class="keyword">public</font>:
<a name="l00080"></a><a class="code" href="class_i_d3___i_f_stream_reader.html#a0">00080</a> ID3_IFStreamReader(ifstream& reader)
00081 : <a class="code" href="class_i_d3___i_stream_reader.html">ID3_IStreamReader</a>(reader), _file(reader) { ; }
00082
<a name="l00083"></a><a class="code" href="class_i_d3___i_f_stream_reader.html#a1">00083</a> <font class="keyword">virtual</font> <font class="keywordtype">void</font> <a class="code" href="class_i_d3___i_stream_reader.html#a2">close</a>()
00084 {
00085 _file.close();
00086 }
00087 };
00088
<a name="l00089"></a><a class="code" href="class_i_d3___memory_reader.html">00089</a> <font class="keyword">class </font><a class="code" href="globals_8h.html#a1">ID3_CPP_EXPORT</a> ID3_MemoryReader : <font class="keyword">public</font> <a class="code" href="class_i_d3___reader.html">ID3_Reader</a>
00090 {
00091 <font class="keyword">const</font> char_type* _beg;
00092 <font class="keyword">const</font> char_type* _cur;
00093 <font class="keyword">const</font> char_type* _end;
00094 <font class="keyword">protected</font>:
<a name="l00095"></a><a class="code" href="class_i_d3___memory_reader.html#b0">00095</a> <font class="keywordtype">void</font> setBuffer(<font class="keyword">const</font> char_type* buf, size_type size)
00096 {
00097 _beg = buf;
00098 _cur = buf;
00099 _end = buf + size;
00100 };
00101 <font class="keyword">public</font>:
<a name="l00102"></a><a class="code" href="class_i_d3___memory_reader.html#a0">00102</a> ID3_MemoryReader()
00103 {
00104 this->setBuffer(<a class="code" href="globals_8h.html#a24">NULL</a>, 0);
00105 }
<a name="l00106"></a><a class="code" href="class_i_d3___memory_reader.html#a1">00106</a> ID3_MemoryReader(<font class="keyword">const</font> char_type* buf, size_type size)
00107 {
00108 this->setBuffer(buf, size);
00109 };
<a name="l00110"></a><a class="code" href="class_i_d3___memory_reader.html#a2">00110</a> ID3_MemoryReader(<font class="keyword">const</font> <font class="keywordtype">char</font>* buf, size_type size)
00111 {
00112 this->setBuffer(reinterpret_cast<const char_type*>(buf), size);
00113 };
<a name="l00114"></a><a class="code" href="class_i_d3___memory_reader.html#a3">00114</a> <font class="keyword">virtual</font> ~ID3_MemoryReader() { ; }
<a name="l00115"></a><a class="code" href="class_i_d3___memory_reader.html#a4">00115</a> <font class="keyword">virtual</font> <font class="keywordtype">void</font> <a class="code" href="class_i_d3___reader.html#a0">close</a>() { ; }
00116
<a name="l00117"></a><a class="code" href="class_i_d3___memory_reader.html#a5">00117</a> <font class="keyword">virtual</font> int_type <a class="code" href="class_i_d3___reader.html#a6">peekChar</a>()
00118 {
00119 <font class="keywordflow">if</font> (!this-><a class="code" href="class_i_d3___reader.html#a11">atEnd</a>())
00120 {
00121 <font class="keywordflow">return</font> *_cur;
00122 }
00123 <font class="keywordflow">return</font> END_OF_READER;
00124 }
00125
<a name="l00129"></a><a class="code" href="class_i_d3___memory_reader.html#a6">00129</a> <font class="keyword">virtual</font> size_type <a class="code" href="class_i_d3___reader.html#a7">readChars</a>(<font class="keywordtype">char</font> buf[], size_type len)
00130 {
00131 <font class="keywordflow">return</font> this-><a class="code" href="class_i_d3___reader.html#a7">readChars</a>(reinterpret_cast<char_type *>(buf), len);
00132 }
00133 <font class="keyword">virtual</font> size_type <a class="code" href="class_i_d3___reader.html#a7">readChars</a>(char_type buf[], size_type len);
00134
<a name="l00135"></a><a class="code" href="class_i_d3___memory_reader.html#a8">00135</a> <font class="keyword">virtual</font> pos_type <a class="code" href="class_i_d3___reader.html#a3">getCur</a>()
00136 {
00137 <font class="keywordflow">return</font> _cur - _beg;
00138 }
00139
<a name="l00140"></a><a class="code" href="class_i_d3___memory_reader.html#a9">00140</a> <font class="keyword">virtual</font> pos_type <a class="code" href="class_i_d3___reader.html#a1">getBeg</a>()
00141 {
00142 <font class="keywordflow">return</font> _beg - _beg;
00143 }
00144
<a name="l00145"></a><a class="code" href="class_i_d3___memory_reader.html#a10">00145</a> <font class="keyword">virtual</font> pos_type <a class="code" href="class_i_d3___reader.html#a2">getEnd</a>()
00146 {
00147 <font class="keywordflow">return</font> _end - _beg;
00148 }
00149
<a name="l00152"></a><a class="code" href="class_i_d3___memory_reader.html#a11">00152</a> <font class="keyword">virtual</font> pos_type <a class="code" href="class_i_d3___reader.html#a4">setCur</a>(pos_type pos)
00153 {
00154 pos_type end = this-><a class="code" href="class_i_d3___reader.html#a2">getEnd</a>();
00155 size_type size = (pos < end) ? pos : end;
00156 _cur = _beg + size;
00157 <font class="keywordflow">return</font> this-><a class="code" href="class_i_d3___reader.html#a3">getCur</a>();
00158 }
00159 };
00160
00161 <font class="preprocessor">#endif </font><font class="comment">/* _ID3LIB_READERS_H_ */</font>
</pre></div><hr><address><small>Generated on Thu Jan 3 07:35:55 2002 for id3lib by
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