/*

  * Copyright (c) 1999

  * Silicon Graphics Computer Systems, Inc.

  *

  * Copyright (c) 1999

  * Boris Fomitchev

  *

  * This material is provided "as is", with absolutely no warranty expressed

  * or implied. Any use is at your own risk.

  *

  * Permission to use or copy this software for any purpose is hereby granted

  * without fee, provided the above notices are retained on all copies.

  * Permission to modify the code and to distribute modified code is granted,

  * provided the above notices are retained, and a notice that the code was

  * modified is included with the above copyright notice.

  *

  */

 #ifndef MESSAGE_FACETS_H

 #define MESSAGE_FACETS_H

 #include <string>

 #include <locale>

 #include <typeinfo>

 #include <hash_map>

 #include "c_locale.h"

 #include "acquire_release.h"

 _STLP_BEGIN_NAMESPACE

 _STLP_MOVE_TO_PRIV_NAMESPACE

 // Class _Catalog_locale_map.  The reason for this is that, internally,

 // a message string is always a char*.  We need a ctype facet to convert

 // a string to and from wchar_t, and the user is permitted to provide such

 // a facet when calling open().

 struct _Catalog_locale_map {

   _Catalog_locale_map() : M(0) {}

   ~_Catalog_locale_map() { if (M) delete M; }

   void insert(nl_catd_type key, const locale& L);

   locale lookup(nl_catd_type key) const;

   void erase(nl_catd_type key);

   typedef hash_map<nl_catd_type, locale, hash<nl_catd_type>, equal_to<nl_catd_type> > map_type;

   map_type *M;

 private:                        // Invalidate copy constructor and assignment

   _Catalog_locale_map(const _Catalog_locale_map&);

   void operator=(const _Catalog_locale_map&);

 };

 /*

  * In glibc nl_catd type is void *, but messages_base::catalog is defined as int

  * by ISO/IEC 14882; The int may be too short to store pointer on 64-bit platforms;

  * Another problem, is that do_open() may return negative value to indicate that no

  * catalog open---this case can't be represented with pointers.

  * The class _Catalog_nl_catd_map intended to make relation between

  * messages_base::catalog and nl_catd handler.

  *

  */

 #if defined (_STLP_REAL_LOCALE_IMPLEMENTED) && (defined (_STLP_USE_GLIBC) && !defined (__CYGWIN__))

 #  define _STLP_USE_NL_CATD_MAPPING

 #else

 /* If no mapping a message_base::catalog entry, int typedef according C++ Standard 22.2.7.1,

  * has to be large enough to contain a nl_catd_type value.

  */

 _STLP_STATIC_ASSERT(sizeof(nl_catd_type) <= sizeof(int))

 #endif

 class _STLP_CLASS_DECLSPEC _Catalog_nl_catd_map {

 public:

   _Catalog_nl_catd_map()

   {}

   ~_Catalog_nl_catd_map()

   {}

   typedef hash_map<messages_base::catalog, nl_catd_type, hash<messages_base::catalog>, equal_to<messages_base::catalog> > map_type;

   typedef hash_map<nl_catd_type, messages_base::catalog, hash<nl_catd_type>, equal_to<nl_catd_type> > rmap_type;

   // typedef map<messages_base::catalog,nl_catd_type> map_type;

   // typedef map<nl_catd_type,messages_base::catalog> rmap_type;

   messages_base::catalog insert(nl_catd_type cat)

 #if !defined (_STLP_USE_NL_CATD_MAPPING)

   { return (messages_base::catalog)cat; }

 #else

   ;

 #endif

   void erase(messages_base::catalog)

 #if !defined (_STLP_USE_NL_CATD_MAPPING)

   {}

 #else

   ;

 #endif

   nl_catd_type operator [] ( messages_base::catalog cat ) const

 #if !defined (_STLP_USE_NL_CATD_MAPPING)

   { return cat; }

 #else

   { return cat < 0 ? 0 : M[cat]; }

 #endif

 private:

   _Catalog_nl_catd_map(const _Catalog_nl_catd_map&);

   _Catalog_nl_catd_map& operator =(const _Catalog_nl_catd_map&);

 #if defined (_STLP_USE_NL_CATD_MAPPING)

   mutable map_type M;

   mutable rmap_type Mr;

   static _STLP_VOLATILE __stl_atomic_t _count;

 #endif

 };

 class _STLP_CLASS_DECLSPEC _Messages {

 public:

   typedef messages_base::catalog catalog;

   _Messages();

   virtual catalog do_open(const string& __fn, const locale& __loc) const;

   virtual string do_get(catalog __c, int __set, int __msgid,

                         const string& __dfault) const;

 #if !defined (_STLP_NO_WCHAR_T)

   virtual wstring do_get(catalog __c, int __set, int __msgid,

                          const wstring& __dfault) const;

 #endif

   virtual void do_close(catalog __c) const;

   virtual ~_Messages();

   bool _M_delete;

 };

 class _STLP_CLASS_DECLSPEC _Messages_impl : public _Messages {

 public:

   _Messages_impl(bool, _Locale_name_hint* hint = 0);

   _Messages_impl(bool, _Locale_messages*);

   catalog do_open(const string& __fn, const locale& __loc) const;

   string do_get(catalog __c, int __set, int __msgid,

                 const string& __dfault) const;

 #if !defined (_STLP_NO_WCHAR_T)

   wstring do_get(catalog __c, int __set, int __msgid,

                  const wstring& __dfault) const;

 #endif

   void do_close(catalog __c) const;

   ~_Messages_impl();

 private:

   _Locale_messages* _M_message_obj;

   _Catalog_locale_map* _M_map;

   mutable _Catalog_nl_catd_map _M_cat;

   //private definition to avoid warning (with ICL)

   _Messages_impl(const _Messages_impl&);

   _Messages_impl& operator=(const _Messages_impl&);

 };

 _STLP_MOVE_TO_STD_NAMESPACE

 _STLP_END_NAMESPACE

 #endif

 // Local Variables:

 // mode:C++

 // End: