/*

 * 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 <unordered_map>

#include "c_locale.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 unordered_map<nl_catd_type, locale, hash<nl_catd_type>, equal_to<nl_catd_type>, 

                   allocator<pair<_STLP_CONST nl_catd_type, locale> > > 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_USE_GLIBC2_LOCALIZATION)

#  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 unordered_map<messages_base::catalog, nl_catd_type, hash<messages_base::catalog>, equal_to<messages_base::catalog>,

                   allocator<pair<_STLP_CONST messages_base::catalog, nl_catd_type> > > map_type;

  typedef unordered_map<nl_catd_type, messages_base::catalog, hash<nl_catd_type>, equal_to<nl_catd_type>,

                   allocator<pair<_STLP_CONST nl_catd_type, messages_base::catalog> > > 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 )

#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)

  map_type M;

  rmap_type Mr;

  static _STLP_VOLATILE __stl_atomic_t _count;

#endif

};

class _Messages {

public:

  typedef messages_base::catalog catalog;

  _Messages(bool, const char *name);

  _Messages(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(); 

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(const _Messages&);

  _Messages& operator=(const _Messages&);

};

_STLP_MOVE_TO_STD_NAMESPACE

_STLP_END_NAMESPACE

#endif

// Local Variables:

// mode:C++

// End: