lib/3rdparty/stlport/src/message_facets.h

   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
  35 struct _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
  47 private:                        // 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
  71 class _STLP_CLASS_DECLSPEC _Catalog_nl_catd_map {
  72 public:
  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
 106 private:
 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
 117 class _Messages {
 118 public:
 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
 134 private:
 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: