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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 : #ifndef _DBHELPER_DBCHARSET_HXX_
21 : #define _DBHELPER_DBCHARSET_HXX_
22 :
23 : #include "sal/config.h"
24 :
25 : #include <cstddef>
26 :
27 : #include <comphelper/stl_types.hxx>
28 : #include <rtl/textenc.h>
29 : #include <rtl/tencinfo.h>
30 : #include <rtl/ustring.hxx>
31 : #include "connectivity/dbtoolsdllapi.hxx"
32 :
33 : //.........................................................................
34 : namespace dbtools
35 : {
36 : //.........................................................................
37 :
38 : //=========================================================================
39 : //= OCharsetMap
40 : //=========================================================================
41 : /** is a class which translates between different charset representations.
42 :
43 : <p>The set of recognized charsets is very limited: only the ones which are database relevant are
44 : implemented at the moment</p>
45 :
46 : <p>Possible representations are:
47 : <ul>
48 : <li><b>IANA names.</b>
49 : Have a look at <A href="http://www.iana.org/assignments/character-sets">this document</A> for
50 : more details</li>
51 : <li><b>rtl_TextEncoding</b></li>
52 : </ul>
53 : </p>
54 : */
55 : class OOO_DLLPUBLIC_DBTOOLS OCharsetMap
56 : {
57 : protected:
58 : DECLARE_STL_STDKEY_SET( rtl_TextEncoding, TextEncBag );
59 :
60 : TextEncBag m_aEncodings;
61 :
62 : public:
63 : class CharsetIterator;
64 : friend class OCharsetMap::CharsetIterator;
65 : typedef CharsetIterator iterator;
66 : typedef CharsetIterator const_iterator;
67 :
68 : OCharsetMap();
69 : virtual ~OCharsetMap();
70 :
71 : struct IANA { };
72 :
73 : /** find the given text encoding in the map.
74 : @return the <em>end</em> iterator if the encoding could not be found.
75 : */
76 : CharsetIterator find(const rtl_TextEncoding _eEncoding) const;
77 : /** find the given IANA name in the map.
78 : @return the <em>end</em> iterator if the IANA name could not be found.
79 : */
80 : CharsetIterator find(const ::rtl::OUString& _rIanaName, const IANA&) const;
81 :
82 : std::size_t size() const { ensureConstructed( ); return m_aEncodings.size(); }
83 :
84 : /// get access to the first element of the charset collection
85 : CharsetIterator begin() const;
86 : /// get access to the (last + 1st) element of the charset collection
87 : CharsetIterator end() const;
88 :
89 : protected:
90 : // needed because we want to call a virtual method during construction
91 : void lateConstruct();
92 0 : inline void ensureConstructed( ) const { if ( m_aEncodings.empty() ) const_cast< OCharsetMap* >( this )->lateConstruct(); }
93 :
94 : virtual sal_Bool approveEncoding( const rtl_TextEncoding _eEncoding, const rtl_TextEncodingInfo& _rInfo ) const;
95 : };
96 :
97 : //-------------------------------------------------------------------------
98 : //- CharsetIteratorDerefHelper
99 : //-------------------------------------------------------------------------
100 0 : class OOO_DLLPUBLIC_DBTOOLS CharsetIteratorDerefHelper
101 : {
102 : friend class OCharsetMap::CharsetIterator;
103 :
104 : rtl_TextEncoding m_eEncoding;
105 : ::rtl::OUString m_aIanaName;
106 :
107 : public:
108 : CharsetIteratorDerefHelper(const CharsetIteratorDerefHelper& _rSource);
109 :
110 0 : rtl_TextEncoding getEncoding() const { return m_eEncoding; }
111 0 : ::rtl::OUString getIanaName() const { return m_aIanaName; }
112 :
113 : protected:
114 : CharsetIteratorDerefHelper( const rtl_TextEncoding _eEncoding, const ::rtl::OUString& _rIanaName );
115 :
116 : };
117 :
118 :
119 : //-------------------------------------------------------------------------
120 : //- OCharsetMap::CharsetIterator
121 : //-------------------------------------------------------------------------
122 : class OOO_DLLPUBLIC_DBTOOLS OCharsetMap::CharsetIterator
123 : {
124 : friend class OCharsetMap;
125 :
126 : friend OOO_DLLPUBLIC_DBTOOLS bool operator==(const CharsetIterator& lhs, const CharsetIterator& rhs);
127 0 : friend bool operator!=(const CharsetIterator& lhs, const CharsetIterator& rhs) { return !(lhs == rhs); }
128 :
129 : // friend sal_Int32 operator-(const CharsetIterator& lhs, const CharsetIterator& rhs);
130 :
131 : protected:
132 : const OCharsetMap* m_pContainer;
133 : OCharsetMap::TextEncBag::const_iterator m_aPos;
134 :
135 : public:
136 : CharsetIterator(const CharsetIterator& _rSource);
137 : ~CharsetIterator();
138 :
139 : CharsetIteratorDerefHelper operator*() const;
140 : // no -> operator
141 : // this would require us to a) store CharsetIteratorDerefHelper instances ourself so that we
142 : // can return a pointer or b) introduce a -> operator on the CharsetIteratorDerefHelper, too.
143 :
144 : /// prefix increment
145 : const CharsetIterator& operator++();
146 : /// postfix increment
147 : const CharsetIterator operator++(int) { CharsetIterator hold(*this); ++*this; return hold; }
148 :
149 : /// prefix decrement
150 : const CharsetIterator& operator--();
151 : /// postfix decrement
152 : const CharsetIterator operator--(int) { CharsetIterator hold(*this); --*this; return hold; }
153 :
154 : protected:
155 : CharsetIterator(const OCharsetMap* _pContainer, OCharsetMap::TextEncBag::const_iterator _aPos );
156 : };
157 :
158 : //.........................................................................
159 : } // namespace dbtools
160 : //.........................................................................
161 :
162 : #endif // _DBHELPER_DBCHARSET_HXX_
163 :
164 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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