projects / ceph.git / blame
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| 62 | <div id="doc-content"> | |
| 63 | <div class="header"> | |
| 64 | <div class="headertitle"> | |
| 65 | <div class="title">wconversions.cpp</div> </div> | |
| 66 | </div><!--header--> | |
| 67 | <div class="contents"> | |
| 68 | <p>Example of using various text conversion functions with wide strings.</p> | |
| 69 | <div class="fragment"><div class="line"><span class="comment">//</span></div> | |
| 70 | <div class="line"><span class="comment">// Copyright (c) 2009-2011 Artyom Beilis (Tonkikh)</span></div> | |
| 71 | <div class="line"><span class="comment">//</span></div> | |
| 72 | <div class="line"><span class="comment">// Distributed under the Boost Software License, Version 1.0. (See</span></div> | |
| 73 | <div class="line"><span class="comment">// accompanying file LICENSE_1_0.txt or copy at</span></div> | |
| 74 | <div class="line"><span class="comment">// http://www.boost.org/LICENSE_1_0.txt)</span></div> | |
| 75 | <div class="line"><span class="comment">//</span></div> | |
| 76 | <div class="line"></div> | |
| 77 | <div class="line"><span class="comment">//</span></div> | |
| 78 | <div class="line"><span class="comment">// ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !</span></div> | |
| 79 | <div class="line"><span class="comment">//</span></div> | |
| 80 | <div class="line"><span class="comment">// BIG FAT WARNING FOR Microsoft Visual Studio Users</span></div> | |
| 81 | <div class="line"><span class="comment">//</span></div> | |
| 82 | <div class="line"><span class="comment">// YOU NEED TO CONVERT THIS SOURCE FILE ENCODING TO UTF-8 WITH BOM ENCODING.</span></div> | |
| 83 | <div class="line"><span class="comment">//</span></div> | |
| 84 | <div class="line"><span class="comment">// Unfortunately MSVC understands that the source code is encoded as</span></div> | |
| 85 | <div class="line"><span class="comment">// UTF-8 only if you add useless BOM in the beginning.</span></div> | |
| 86 | <div class="line"><span class="comment">//</span></div> | |
| 87 | <div class="line"><span class="comment">// So, before you compile "wide" examples with MSVC, please convert them to text</span></div> | |
| 88 | <div class="line"><span class="comment">// files with BOM. There are two very simple ways to do it:</span></div> | |
| 89 | <div class="line"><span class="comment">//</span></div> | |
| 90 | <div class="line"><span class="comment">// 1. Open file with Notepad and save it from there. It would convert </span></div> | |
| 91 | <div class="line"><span class="comment">// it to file with BOM.</span></div> | |
| 92 | <div class="line"><span class="comment">// 2. In Visual Studio go File->Advances Save Options... and select</span></div> | |
| 93 | <div class="line"><span class="comment">// Unicode (UTF-8 with signature) Codepage 65001</span></div> | |
| 94 | <div class="line"><span class="comment">//</span></div> | |
| 95 | <div class="line"><span class="comment">// Note: once converted to UTF-8 with BOM, this source code would not</span></div> | |
| 96 | <div class="line"><span class="comment">// compile with other compilers, because no-one uses BOM with UTF-8 today</span></div> | |
| 97 | <div class="line"><span class="comment">// because it is absolutely meaningless in context of UTF-8.</span></div> | |
| 98 | <div class="line"><span class="comment">//</span></div> | |
| 99 | <div class="line"><span class="comment">// ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !</span></div> | |
| 100 | <div class="line"><span class="comment">//</span></div> | |
| 101 | <div class="line"><span class="preprocessor">#include <boost/locale.hpp></span></div> | |
| 102 | <div class="line"><span class="preprocessor">#include <boost/algorithm/string/case_conv.hpp></span></div> | |
| 103 | <div class="line"><span class="preprocessor">#include <iostream></span></div> | |
| 104 | <div class="line"></div> | |
| 105 | <div class="line"><span class="preprocessor">#include <ctime></span></div> | |
| 106 | <div class="line"></div> | |
| 107 | <div class="line"></div> | |
| 108 | <div class="line"><span class="keywordtype">int</span> main()</div> | |
| 109 | <div class="line">{</div> | |
| 110 | <div class="line"> <span class="keyword">using namespace </span>boost::locale;</div> | |
| 111 | <div class="line"> <span class="keyword">using namespace </span>std;</div> | |
| 112 | <div class="line"> <span class="comment">// Create system default locale</span></div> | |
| 113 | <div class="line"> <a name="_a0"></a><a class="code" href="classboost_1_1locale_1_1generator.html">generator</a> gen;</div> | |
| 114 | <div class="line"> locale loc=gen(<span class="stringliteral">""</span>); </div> | |
| 115 | <div class="line"> locale::global(loc);</div> | |
| 116 | <div class="line"> wcout.imbue(loc);</div> | |
| 117 | <div class="line"></div> | |
| 118 | <div class="line"> <span class="comment">// This is needed to prevent C library to</span></div> | |
| 119 | <div class="line"> <span class="comment">// convert strings to narrow </span></div> | |
| 120 | <div class="line"> <span class="comment">// instead of C++ on some platforms</span></div> | |
| 121 | <div class="line"> std::ios_base::sync_with_stdio(<span class="keyword">false</span>);</div> | |
| 122 | <div class="line"></div> | |
| 123 | <div class="line"> </div> | |
| 124 | <div class="line"> wcout<<L<span class="stringliteral">"Correct case conversion can't be done by simple, character by character conversion"</span><<endl;</div> | |
| 125 | <div class="line"> wcout<<L<span class="stringliteral">"because case conversion is context sensitive and not 1-to-1 conversion"</span><<endl;</div> | |
| 126 | <div class="line"> wcout<<L<span class="stringliteral">"For example:"</span><<endl;</div> | |
| 127 | <div class="line"> wcout<<L<span class="stringliteral">" German grüßen correctly converted to "</span><<<a name="a1"></a><a class="code" href="group__convert.html#ga2ceae621801e8cf4f77c60d1e3047ae8">to_upper</a>(L<span class="stringliteral">"grüßen"</span>)<<L<span class="stringliteral">", instead of incorrect "</span></div> | |
| 128 | <div class="line"> <<boost::to_upper_copy(std::wstring(L<span class="stringliteral">"grüßen"</span>))<<endl;</div> | |
| 129 | <div class="line"> wcout<<L<span class="stringliteral">" where ß is replaced with SS"</span><<endl;</div> | |
| 130 | <div class="line"> wcout<<L<span class="stringliteral">" Greek ὈΔΥΣΣΕΎΣ is correctly converted to "</span><<<a name="a2"></a><a class="code" href="group__convert.html#ga4a3eb15f42f5cbae7bdd00c9e9cac222">to_lower</a>(L<span class="stringliteral">"ὈΔΥΣΣΕΎΣ"</span>)<<L<span class="stringliteral">", instead of incorrect "</span></div> | |
| 131 | <div class="line"> <<boost::to_lower_copy(std::wstring(L<span class="stringliteral">"ὈΔΥΣΣΕΎΣ"</span>))<<endl;</div> | |
| 132 | <div class="line"> wcout<<L<span class="stringliteral">" where Σ is converted to σ or to ς, according to position in the word"</span><<endl;</div> | |
| 133 | <div class="line"> wcout<<L<span class="stringliteral">"Such type of conversion just can't be done using std::toupper that work on character base, also std::toupper is "</span><<endl;</div> | |
| 134 | <div class="line"> wcout<<L<span class="stringliteral">"not fully applicable when working with variable character length like in UTF-8 or UTF-16 limiting the correct "</span><<endl;</div> | |
| 135 | <div class="line"> wcout<<L<span class="stringliteral">"behavoir to BMP or ASCII only"</span><<endl;</div> | |
| 136 | <div class="line"> </div> | |
| 137 | <div class="line">}</div> | |
| 138 | <div class="line"></div> | |
| 139 | <div class="line"><span class="comment">// vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4</span></div> | |
| 140 | <div class="line"></div> | |
| 141 | <div class="line"><span class="comment">// boostinspect:noascii</span></div> | |
| 142 | </div><!-- fragment --> </div><!-- contents --> | |
| 143 | </div><!-- doc-content --> | |
| 144 | ||
| 145 | <li class="footer"> | |
| 146 | © Copyright 2009-2012 Artyom Beilis, Distributed under the <a href="http://www.boost.org/LICENSE_1_0.txt">Boost Software License</a>, Version 1.0. | |
| 147 | </li> | |
| 148 | </ul> | |
| 149 | </div> | |
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