/home/ntakagi/work/STLport-5.1.5/src/message_facets.h Source File

00001 /*
00002  * Copyright (c) 1999
00003  * Silicon Graphics Computer Systems, Inc.
00004  *
00005  * Copyright (c) 1999
00006  * Boris Fomitchev
00007  *
00008  * This material is provided "as is", with absolutely no warranty expressed
00009  * or implied. Any use is at your own risk.
00010  *
00011  * Permission to use or copy this software for any purpose is hereby granted
00012  * without fee, provided the above notices are retained on all copies.
00013  * Permission to modify the code and to distribute modified code is granted,
00014  * provided the above notices are retained, and a notice that the code was
00015  * modified is included with the above copyright notice.
00016  *
00017  */
00018 #ifndef MESSAGE_FACETS_H
00019 #define MESSAGE_FACETS_H
00020 
00021 #include <string>
00022 #include <locale>
00023 #include <typeinfo>
00024 #include <hash_map>
00025 
00026 #include "c_locale.h"
00027 #include "acquire_release.h"
00028 
00029 _STLP_BEGIN_NAMESPACE
00030 _STLP_MOVE_TO_PRIV_NAMESPACE
00031 
00032 // Class _Catalog_locale_map.  The reason for this is that, internally,
00033 // a message string is always a char*.  We need a ctype facet to convert
00034 // a string to and from wchar_t, and the user is permitted to provide such
00035 // a facet when calling open().
00036 
00037 struct _Catalog_locale_map {
00038   _Catalog_locale_map() : M(0) {}
00039   ~_Catalog_locale_map() { if (M) delete M; }
00040 
00041   void insert(nl_catd_type key, const locale& L);
00042   locale lookup(nl_catd_type key) const;
00043   void erase(nl_catd_type key);
00044 
00045   typedef hash_map<nl_catd_type, locale, hash<nl_catd_type>, equal_to<nl_catd_type> > map_type;
00046   map_type *M;
00047 
00048 private:                        // Invalidate copy constructor and assignment
00049   _Catalog_locale_map(const _Catalog_locale_map&);
00050   void operator=(const _Catalog_locale_map&);
00051 };
00052 
00053 /*
00054  * In glibc nl_catd type is void *, but messages_base::catalog is defined as int
00055  * by ISO/IEC 14882; The int may be too short to store pointer on 64-bit platforms;
00056  * Another problem, is that do_open() may return negative value to indicate that no
00057  * catalog open---this case can't be represented with pointers.
00058  * The class _Catalog_nl_catd_map intended to make relation between
00059  * messages_base::catalog and nl_catd handler.
00060  *
00061  */
00062 
00063 #if defined (_STLP_REAL_LOCALE_IMPLEMENTED) && (defined (_STLP_USE_GLIBC) && !defined (__CYGWIN__))
00064 #  define _STLP_USE_NL_CATD_MAPPING
00065 #else
00066 /* If no mapping a message_base::catalog entry, int typedef according C++ Standard 22.2.7.1,
00067  * has to be large enough to contain a nl_catd_type value.
00068  */
00069 _STLP_STATIC_ASSERT(sizeof(nl_catd_type) <= sizeof(int))
00070 #endif
00071 
00072 class _STLP_CLASS_DECLSPEC _Catalog_nl_catd_map {
00073 public:
00074   _Catalog_nl_catd_map()
00075   {}
00076   ~_Catalog_nl_catd_map()
00077   {}
00078 
00079   typedef hash_map<messages_base::catalog, nl_catd_type, hash<messages_base::catalog>, equal_to<messages_base::catalog> > map_type;
00080   typedef hash_map<nl_catd_type, messages_base::catalog, hash<nl_catd_type>, equal_to<nl_catd_type> > rmap_type;
00081   // typedef map<messages_base::catalog,nl_catd_type> map_type;
00082   // typedef map<nl_catd_type,messages_base::catalog> rmap_type;
00083 
00084   messages_base::catalog insert(nl_catd_type cat)
00085 #if !defined (_STLP_USE_NL_CATD_MAPPING)
00086   { return (messages_base::catalog)cat; }
00087 #else
00088   ;
00089 #endif
00090 
00091   void erase(messages_base::catalog)
00092 #if !defined (_STLP_USE_NL_CATD_MAPPING)
00093   {}
00094 #else
00095   ;
00096 #endif
00097 
00098   nl_catd_type operator [] ( messages_base::catalog cat ) const
00099 #if !defined (_STLP_USE_NL_CATD_MAPPING)
00100   { return cat; }
00101 #else
00102   { return cat < 0 ? 0 : M[cat]; }
00103 #endif
00104 
00105 private:
00106   _Catalog_nl_catd_map(const _Catalog_nl_catd_map&);
00107   _Catalog_nl_catd_map& operator =(const _Catalog_nl_catd_map&);
00108 
00109 #if defined (_STLP_USE_NL_CATD_MAPPING)
00110   mutable map_type M;
00111   mutable rmap_type Mr;
00112   static _STLP_VOLATILE __stl_atomic_t _count;
00113 #endif
00114 };
00115 
00116 class _STLP_CLASS_DECLSPEC _Messages {
00117 public:
00118   typedef messages_base::catalog catalog;
00119 
00120   _Messages();
00121 
00122   virtual catalog do_open(const string& __fn, const locale& __loc) const;
00123   virtual string do_get(catalog __c, int __set, int __msgid,
00124                         const string& __dfault) const;
00125 #if !defined (_STLP_NO_WCHAR_T)
00126   virtual wstring do_get(catalog __c, int __set, int __msgid,
00127                          const wstring& __dfault) const;
00128 #endif
00129   virtual void do_close(catalog __c) const;
00130   virtual ~_Messages();
00131   bool _M_delete;
00132 };
00133 
00134 class _STLP_CLASS_DECLSPEC _Messages_impl : public _Messages {
00135 public:
00136   _Messages_impl(bool, _Locale_name_hint* hint = 0);
00137   _Messages_impl(bool, _Locale_messages*);
00138 
00139   catalog do_open(const string& __fn, const locale& __loc) const;
00140   string do_get(catalog __c, int __set, int __msgid,
00141                 const string& __dfault) const;
00142 #if !defined (_STLP_NO_WCHAR_T)
00143   wstring do_get(catalog __c, int __set, int __msgid,
00144                  const wstring& __dfault) const;
00145 #endif
00146   void do_close(catalog __c) const;
00147 
00148   ~_Messages_impl();
00149 
00150 private:
00151   _Locale_messages* _M_message_obj;
00152   _Catalog_locale_map* _M_map;
00153   mutable _Catalog_nl_catd_map _M_cat;
00154 
00155   //private definition to avoid warning (with ICL)
00156   _Messages_impl(const _Messages_impl&);
00157   _Messages_impl& operator=(const _Messages_impl&);
00158 };
00159 
00160 _STLP_MOVE_TO_STD_NAMESPACE
00161 
00162 _STLP_END_NAMESPACE
00163 
00164 #endif
00165 
00166 // Local Variables:
00167 // mode:C++
00168 // End: