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<hr><h1>src/utils.cpp</h1><a href="utils_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 <font class="comment">// $Id: utils.cpp,v 1.19 2001/08/26 23:33:32 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 <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 <font class="preprocessor">#if defined HAVE_ICONV_H</font>
00032 <font class="preprocessor"></font><font class="preprocessor"># include <iconv.h></font>
00033 <font class="preprocessor"># include <errno.h></font>
00034 <font class="preprocessor">#endif</font>
00035 <font class="preprocessor"></font>
00036 <font class="preprocessor">#include <ctype.h></font>
00037 <font class="preprocessor">#include <iostream.h></font>
00038
00039 <font class="preprocessor">#ifdef macintosh</font>
00040 <font class="preprocessor"></font><font class="preprocessor">#define NOCREATE ((std::ios_base::openmode)0)</font>
00041 <font class="preprocessor"></font><font class="preprocessor">#define toascii(X) (X)</font>
00042 <font class="preprocessor"></font><font class="preprocessor">#else</font>
<a name="l00043"></a><a class="code" href="utils_8cpp.html#a0">00043</a> <font class="preprocessor"></font><font class="preprocessor">#define NOCREATE ios::nocreate</font>
00044 <font class="preprocessor"></font><font class="preprocessor">#endif</font>
00045 <font class="preprocessor"></font>
00046 <font class="preprocessor">#include "utils.h"</font>
00047
00048 <font class="keyword">using</font> <font class="keyword">namespace </font>dami;
00049
00050 size_t dami::renderNumber(<a class="code" href="globals_8h.html#a33">uchar</a> *buffer, <a class="code" href="sized__types_8h.html#a4">uint32</a> val, size_t size)
00051 {
00052 <a class="code" href="sized__types_8h.html#a4">uint32</a> num = val;
00053 <font class="keywordflow">for</font> (size_t i = 0; i < size; i++)
00054 {
00055 buffer[size - i - 1] = (uchar)(num & <a class="code" href="globals_8h.html#a19">MASK8</a>);
00056 num >>= 8;
00057 }
00058 <font class="keywordflow">return</font> size;
00059 }
00060
00061 String dami::renderNumber(<a class="code" href="sized__types_8h.html#a4">uint32</a> val, size_t size)
00062 {
00063 String str(size, <font class="charliteral">'\0'</font>);
00064 <a class="code" href="sized__types_8h.html#a4">uint32</a> num = val;
00065 <font class="keywordflow">for</font> (size_t i = 0; i < size; i++)
00066 {
00067 str[size - i - 1] = (uchar)(num & <a class="code" href="globals_8h.html#a19">MASK8</a>);
00068 num >>= 8;
00069 }
00070 <font class="keywordflow">return</font> str;
00071 }
00072
00073
00074 <font class="keyword">namespace </font>
00075 <font class="keyword"></font>{
00076 <font class="preprocessor">#if !defined(HAVE_ICONV_H)</font>
00077 <font class="preprocessor"></font> <font class="comment">// converts an ASCII string into a Unicode one</font>
00078 String mbstoucs(String data)
00079 {
00080 size_t size = data.size();
00081 String unicode(size * 2, <font class="charliteral">'\0'</font>);
00082 <font class="keywordflow">for</font> (<a class="code" href="globals_8h.html#a7">index_t</a> i = 0; i < size; i++)
00083 {
00084 unicode[i*2+1] = toascii(data[i]);
00085 }
00086 <font class="keywordflow">return</font> unicode;
00087 }
00088
00089 <font class="comment">// converts a Unicode string into ASCII</font>
00090
00091 String ucstombs(String data)
00092 {
00093 size_t size = data.size() / 2;
00094 String ascii(size, <font class="charliteral">'\0'</font>);
00095 <font class="keywordflow">for</font> (<a class="code" href="globals_8h.html#a7">index_t</a> i = 0; i < size; i++)
00096 {
00097 ascii[i] = toascii(data[i*2+1]);
00098 }
00099 <font class="keywordflow">return</font> ascii;
00100 }
00101 <font class="preprocessor">#else</font>
00102 <font class="preprocessor"></font>
00103 String convert_i(iconv_t cd, String source)
00104 {
00105 String target;
00106 size_t source_size = source.size();
00107 <font class="comment">// const char* source_str = source.data();</font>
00108 <font class="keywordtype">char</font> * source_str = <font class="keyword">new</font> <font class="keywordtype">char</font>[source.length()+1];
00109 source.copy(source_str, string::npos);
00110 source_str[source.length()] = 0;
00111
00112 <font class="preprocessor">#define BUFSIZ 1024</font>
00113 <font class="preprocessor"></font> <font class="keywordtype">char</font> buf[BUFSIZ];
00114 <font class="keywordtype">char</font>* target_str = buf;
00115 size_t target_size = BUFSIZ;
00116
00117 <font class="keywordflow">do</font>
00118 {
00119 size_t nconv = iconv(cd,
00120 &source_str, &source_size,
00121 &target_str, &target_size);
00122 <font class="keywordflow">if</font> (nconv == (size_t) -1 && errno != EINVAL && errno != E2BIG)
00123 {
00124 <font class="keywordflow">return</font> target;
00125 }
00126 target.append(buf, BUFSIZ - target_size);
00127 target_str = buf;
00128 target_size = BUFSIZ;
00129 }
00130 <font class="keywordflow">while</font> (source_size > 0);
00131 <font class="keywordflow">return</font> target;
00132 }
00133
00134 <font class="keyword">const</font> <font class="keywordtype">char</font>* getFormat(<a class="code" href="globals_8h.html#a214">ID3_TextEnc</a> enc)
00135 {
00136 <font class="keyword">const</font> <font class="keywordtype">char</font>* format = <a class="code" href="globals_8h.html#a24">NULL</a>;
00137 <font class="keywordflow">switch</font> (enc)
00138 {
00139 <font class="keywordflow">case</font> <a class="code" href="globals_8h.html#a214a47">ID3TE_ASCII</a>:
00140 format = ID3_ICONV_FORMAT_ASCII;
00141 <font class="keywordflow">break</font>;
00142
00143 <font class="keywordflow">case</font> <a class="code" href="globals_8h.html#a214a43">ID3TE_UTF16</a>:
00144 format = ID3_ICONV_FORMAT_UTF16;
00145 <font class="keywordflow">break</font>;
00146
00147 <font class="keywordflow">case</font> <a class="code" href="globals_8h.html#a214a44">ID3TE_UTF16BE</a>:
00148 format = ID3_ICONV_FORMAT_UTF16BE;
00149 <font class="keywordflow">break</font>;
00150
00151 <font class="keywordflow">case</font> <a class="code" href="globals_8h.html#a214a45">ID3TE_UTF8</a>:
00152 format = ID3_ICONV_FORMAT_UTF8;
00153 <font class="keywordflow">break</font>;
00154
00155 <font class="keywordflow">default</font>:
00156 <font class="keywordflow">break</font>;
00157 }
00158 <font class="keywordflow">return</font> format;
00159 }
00160 <font class="preprocessor">#endif</font>
00161 <font class="preprocessor"></font>}
00162
00163 String dami::convert(String data, <a class="code" href="globals_8h.html#a214">ID3_TextEnc</a> sourceEnc, <a class="code" href="globals_8h.html#a214">ID3_TextEnc</a> targetEnc)
00164 {
00165 String target;
00166 <font class="preprocessor">#if !defined HAVE_ICONV_H</font>
00167 <font class="preprocessor"></font><font class="preprocessor">#define ID3_IS_ASCII(enc) \</font>
00168 <font class="preprocessor"> ((enc) == ID3TE_ASCII || \</font>
00169 <font class="preprocessor"> (enc) == ID3TE_ISO8859_1 || \</font>
00170 <font class="preprocessor"> (enc) == ID3TE_UTF8)</font>
00171 <font class="preprocessor"></font><font class="preprocessor">#define ID3_IS_UNICODE(enc) \</font>
00172 <font class="preprocessor"> ((enc) == ID3TE_UNICODE || \</font>
00173 <font class="preprocessor"> (enc) == ID3TE_UTF16 || \</font>
00174 <font class="preprocessor"> (enc) == ID3TE_UTF16BE)</font>
00175 <font class="preprocessor"></font> <font class="keywordflow">if</font> (<a class="code" href="utils_8cpp.html#a1">ID3_IS_ASCII</a>(sourceEnc) && <a class="code" href="utils_8cpp.html#a2">ID3_IS_UNICODE</a>(targetEnc))
00176 {
00177 target = mbstoucs(data);
00178 }
00179 <font class="keywordflow">else</font> <font class="keywordflow">if</font> (<a class="code" href="utils_8cpp.html#a2">ID3_IS_UNICODE</a>(sourceEnc) && <a class="code" href="utils_8cpp.html#a1">ID3_IS_ASCII</a>(targetEnc))
00180 {
00181 target = ucstombs(data);
00182 }
00183 <font class="preprocessor">#else</font>
00184 <font class="preprocessor"></font> <font class="keywordflow">if</font> (sourceEnc != targetEnc)
00185 {
00186 <font class="keyword">const</font> <font class="keywordtype">char</font>* targetFormat = getFormat(targetEnc);
00187 <font class="keyword">const</font> <font class="keywordtype">char</font>* sourceFormat = getFormat(sourceEnc);
00188
00189 iconv_t cd = iconv_open (targetFormat, sourceFormat);
00190 <font class="keywordflow">if</font> (cd != (iconv_t) -1)
00191 {
00192 target = convert_i(cd, data);
00193 }
00194 iconv_close (cd);
00195 }
00196 <font class="preprocessor">#endif</font>
00197 <font class="preprocessor"></font> <font class="keywordflow">return</font> target;
00198 }
00199
00200 size_t dami::ucslen(<font class="keyword">const</font> <a class="code" href="globals_8h.html#a39">unicode_t</a> *unicode)
00201 {
00202 <font class="keywordflow">if</font> (<a class="code" href="globals_8h.html#a24">NULL</a> != unicode)
00203 {
00204 <font class="keywordflow">for</font> (size_t size = 0; <font class="keyword">true</font>; size++)
00205 {
00206 <font class="keywordflow">if</font> (<a class="code" href="globals_8h.html#a8">NULL_UNICODE</a> == unicode[size])
00207 {
00208 <font class="keywordflow">return</font> size;
00209 }
00210 }
00211 }
00212 <font class="keywordflow">return</font> 0;
00213 }
00214
00215 <font class="keyword">namespace</font>
00216 <font class="keyword"></font>{
00217 <font class="keywordtype">bool</font> exists(String name)
00218 {
00219 ifstream file(name.c_str(), <a class="code" href="utils_8cpp.html#a0">NOCREATE</a>);
00220 <font class="keywordflow">return</font> file.is_open() != 0;
00221 }
00222 };
00223
00224 <a class="code" href="globals_8h.html#a223">ID3_Err</a> dami::createFile(String name, fstream& file)
00225 {
00226 <font class="keywordflow">if</font> (file.is_open())
00227 {
00228 file.close();
00229 }
00230
00231 file.open(name.c_str(), ios::out | ios::binary | ios::trunc);
00232 <font class="keywordflow">if</font> (!file)
00233 {
00234 <font class="keywordflow">return</font> <a class="code" href="globals_8h.html#a223a203">ID3E_ReadOnly</a>;
00235 }
00236
00237 <font class="keywordflow">return</font> <a class="code" href="globals_8h.html#a223a191">ID3E_NoError</a>;
00238 }
00239
00240 size_t dami::getFileSize(fstream& file)
00241 {
00242 size_t size = 0;
00243 <font class="keywordflow">if</font> (file.is_open())
00244 {
00245 streamoff curpos = file.tellg();
00246 file.seekg(0, ios::end);
00247 size = file.tellg();
00248 file.seekg(curpos);
00249 }
00250 <font class="keywordflow">return</font> size;
00251 }
00252
00253 size_t dami::getFileSize(ifstream& file)
00254 {
00255 size_t size = 0;
00256 <font class="keywordflow">if</font> (file.is_open())
00257 {
00258 streamoff curpos = file.tellg();
00259 file.seekg(0, ios::end);
00260 size = file.tellg();
00261 file.seekg(curpos);
00262 }
00263 <font class="keywordflow">return</font> size;
00264 }
00265
00266 size_t dami::getFileSize(ofstream& file)
00267 {
00268 size_t size = 0;
00269 <font class="keywordflow">if</font> (file.is_open())
00270 {
00271 streamoff curpos = file.tellp();
00272 file.seekp(0, ios::end);
00273 size = file.tellp();
00274 file.seekp(curpos);
00275 }
00276 <font class="keywordflow">return</font> size;
00277 }
00278
00279 <a class="code" href="globals_8h.html#a223">ID3_Err</a> dami::openWritableFile(String name, fstream& file)
00280 {
00281 <font class="keywordflow">if</font> (!exists(name))
00282 {
00283 <font class="keywordflow">return</font> <a class="code" href="globals_8h.html#a223a202">ID3E_NoFile</a>;
00284 }
00285
00286 <font class="keywordflow">if</font> (file.is_open())
00287 {
00288 file.close();
00289 }
00290 file.open(name.c_str(), ios::in | ios::out | ios::binary | <a class="code" href="utils_8cpp.html#a0">NOCREATE</a>);
00291 <font class="keywordflow">if</font> (!file)
00292 {
00293 <font class="keywordflow">return</font> <a class="code" href="globals_8h.html#a223a203">ID3E_ReadOnly</a>;
00294 }
00295
00296 <font class="keywordflow">return</font> <a class="code" href="globals_8h.html#a223a191">ID3E_NoError</a>;
00297 }
00298
00299 <a class="code" href="globals_8h.html#a223">ID3_Err</a> dami::openWritableFile(String name, ofstream& file)
00300 {
00301 <font class="keywordflow">if</font> (!exists(name))
00302 {
00303 <font class="keywordflow">return</font> <a class="code" href="globals_8h.html#a223a202">ID3E_NoFile</a>;
00304 }
00305
00306 <font class="keywordflow">if</font> (file.is_open())
00307 {
00308 file.close();
00309 }
00310 file.open(name.c_str(), ios::in | ios::out | ios::binary | <a class="code" href="utils_8cpp.html#a0">NOCREATE</a>);
00311 <font class="keywordflow">if</font> (!file)
00312 {
00313 <font class="keywordflow">return</font> <a class="code" href="globals_8h.html#a223a203">ID3E_ReadOnly</a>;
00314 }
00315
00316 <font class="keywordflow">return</font> <a class="code" href="globals_8h.html#a223a191">ID3E_NoError</a>;
00317 }
00318
00319 <a class="code" href="globals_8h.html#a223">ID3_Err</a> dami::openReadableFile(String name, fstream& file)
00320 {
00321 <font class="keywordflow">if</font> (file.is_open())
00322 {
00323 file.close();
00324 }
00325 file.open(name.c_str(), ios::in | ios::binary | <a class="code" href="utils_8cpp.html#a0">NOCREATE</a>);
00326 <font class="keywordflow">if</font> (!file)
00327 {
00328 <font class="keywordflow">return</font> <a class="code" href="globals_8h.html#a223a202">ID3E_NoFile</a>;
00329 }
00330
00331 <font class="keywordflow">return</font> <a class="code" href="globals_8h.html#a223a191">ID3E_NoError</a>;
00332 }
00333
00334 <a class="code" href="globals_8h.html#a223">ID3_Err</a> dami::openReadableFile(String name, ifstream& file)
00335 {
00336 <font class="keywordflow">if</font> (file.is_open())
00337 {
00338 file.close();
00339 }
00340 file.open(name.c_str(), ios::in | ios::binary | <a class="code" href="utils_8cpp.html#a0">NOCREATE</a>);
00341 <font class="keywordflow">if</font> (!file)
00342 {
00343 <font class="keywordflow">return</font> <a class="code" href="globals_8h.html#a223a202">ID3E_NoFile</a>;
00344 }
00345
00346 <font class="keywordflow">return</font> <a class="code" href="globals_8h.html#a223a191">ID3E_NoError</a>;
00347 }
00348
00349 String dami::toString(<a class="code" href="sized__types_8h.html#a4">uint32</a> val)
00350 {
00351 <font class="keywordflow">if</font> (val == 0)
00352 {
00353 <font class="keywordflow">return</font> <font class="stringliteral">"0"</font>;
00354 }
00355 String text;
00356 <font class="keywordflow">while</font> (val > 0)
00357 {
00358 String tmp;
00359 <font class="keywordtype">char</font> ch = (val % 10) + <font class="charliteral">'0'</font>;
00360 tmp += ch;
00361 text = tmp + text;
00362 val /= 10;
00363 }
00364 <font class="keywordflow">return</font> text;
00365 }
00366
00367 WString dami::toWString(<font class="keyword">const</font> <a class="code" href="globals_8h.html#a39">unicode_t</a> buf[], size_t len)
00368 {
00369 WString str;
00370 str.reserve(len);
00371
00372 <font class="keywordflow">for</font> (size_t i = 0; i < len; ++i)
00373 {
00374 str += static_cast<WString::value_type>(buf[i]);
00375 }
00376 <font class="keywordflow">return</font> str;
00377 }
</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>,
© 1997-2001</small></address>
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