1/*
2 * Copyright (c) 1999
3 * Silicon Graphics Computer Systems, Inc.
4 *
5 * Copyright (c) 1999
6 * Boris Fomitchev
7 *
8 * This material is provided "as is", with absolutely no warranty expressed
9 * or implied. Any use is at your own risk.
10 *
11 * Permission to use or copy this software for any purpose is hereby granted
12 * without fee, provided the above notices are retained on all copies.
13 * Permission to modify the code and to distribute modified code is granted,
14 * provided the above notices are retained, and a notice that the code was
15 * modified is included with the above copyright notice.
16 *
17 */
18#ifndef MESSAGE_FACETS_H
19#define MESSAGE_FACETS_H
20
21#include <string>
22#include <locale>
23#include <hash_map>
24
25#include "c_locale.h"
26
27_STLP_BEGIN_NAMESPACE
28_STLP_MOVE_TO_PRIV_NAMESPACE
29
30// Class _Catalog_locale_map.  The reason for this is that, internally,
31// a message string is always a char*.  We need a ctype facet to convert
32// a string to and from wchar_t, and the user is permitted to provide such
33// a facet when calling open().
34
35struct _Catalog_locale_map {
36  _Catalog_locale_map() : M(0) {}
37  ~_Catalog_locale_map() { if (M) delete M; }
38
39  void insert(nl_catd_type key, const locale& L);
40  locale lookup(nl_catd_type key) const;
41  void erase(nl_catd_type key);
42
43  typedef hash_map<nl_catd_type, locale, hash<nl_catd_type>, equal_to<nl_catd_type>,
44                   allocator<pair<_STLP_CONST nl_catd_type, locale> > > map_type;
45  map_type *M;
46
47private:                        // Invalidate copy constructor and assignment
48  _Catalog_locale_map(const _Catalog_locale_map&);
49  void operator=(const _Catalog_locale_map&);
50};
51
52/*
53 * In glibc nl_catd type is void *, but messages_base::catalog is defined as int
54 * by ISO/IEC 14882; The int may be too short to store pointer on 64-bit platforms;
55 * Another problem, is that do_open() may return negative value to indicate that no
56 * catalog open---this case can't be represented with pointers.
57 * The class _Catalog_nl_catd_map intended to make relation between
58 * messages_base::catalog and nl_catd handler.
59 *
60 */
61
62#if defined (_STLP_USE_GLIBC2_LOCALIZATION)
63#  define _STLP_USE_NL_CATD_MAPPING
64#else
65/* If no mapping a message_base::catalog entry, int typedef according C++ Standard 22.2.7.1,
66 * has to be large enough to contain a nl_catd_type value.
67 */
68_STLP_STATIC_ASSERT(sizeof(nl_catd_type) <= sizeof(int))
69#endif
70
71class _STLP_CLASS_DECLSPEC _Catalog_nl_catd_map {
72public:
73  _Catalog_nl_catd_map()
74  {}
75  ~_Catalog_nl_catd_map()
76  {}
77
78  typedef hash_map<messages_base::catalog, nl_catd_type, hash<messages_base::catalog>, equal_to<messages_base::catalog>,
79                   allocator<pair<_STLP_CONST messages_base::catalog, nl_catd_type> > > map_type;
80  typedef hash_map<nl_catd_type, messages_base::catalog, hash<nl_catd_type>, equal_to<nl_catd_type>,
81                   allocator<pair<_STLP_CONST nl_catd_type, messages_base::catalog> > > rmap_type;
82  // typedef map<messages_base::catalog,nl_catd_type> map_type;
83  // typedef map<nl_catd_type,messages_base::catalog> rmap_type;
84
85  messages_base::catalog insert(nl_catd_type cat)
86#if !defined (_STLP_USE_NL_CATD_MAPPING)
87  { return (messages_base::catalog)cat; }
88#else
89  ;
90#endif
91
92  void erase(messages_base::catalog)
93#if !defined (_STLP_USE_NL_CATD_MAPPING)
94  {}
95#else
96  ;
97#endif
98
99  nl_catd_type operator [] ( messages_base::catalog cat )
100#if !defined (_STLP_USE_NL_CATD_MAPPING)
101  { return cat; }
102#else
103  { return cat < 0 ? 0 : M[cat]; }
104#endif
105
106private:
107  _Catalog_nl_catd_map(const _Catalog_nl_catd_map&);
108  _Catalog_nl_catd_map& operator =(const _Catalog_nl_catd_map&);
109
110#if defined (_STLP_USE_NL_CATD_MAPPING)
111  map_type M;
112  rmap_type Mr;
113  static _STLP_VOLATILE __stl_atomic_t _count;
114#endif
115};
116
117class _Messages {
118public:
119  typedef messages_base::catalog catalog;
120
121  _Messages(bool, const char *name);
122  _Messages(bool, _Locale_messages*);
123
124  catalog do_open(const string& __fn, const locale& __loc) const;
125  string do_get(catalog __c, int __set, int __msgid,
126                const string& __dfault) const;
127#if !defined (_STLP_NO_WCHAR_T)
128  wstring do_get(catalog __c, int __set, int __msgid,
129                 const wstring& __dfault) const;
130#endif
131  void do_close(catalog __c) const;
132  ~_Messages();
133
134private:
135  _Locale_messages* _M_message_obj;
136  _Catalog_locale_map* _M_map;
137  mutable _Catalog_nl_catd_map _M_cat;
138
139  //private definition to avoid warning (with ICL)
140  _Messages(const _Messages&);
141  _Messages& operator=(const _Messages&);
142};
143
144_STLP_MOVE_TO_STD_NAMESPACE
145
146_STLP_END_NAMESPACE
147
148#endif
149
150// Local Variables:
151// mode:C++
152// End:
153