/*

 * 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.

 *

 */

#include "stlport_prefix.h"

#include <unordered_map>

#include <string>

#include <locale>

#include <istream>

#include "c_locale.h"

#include "locale_impl.h"

#include "acquire_release.h"

_STLP_BEGIN_NAMESPACE

_STLP_MOVE_TO_PRIV_NAMESPACE

// Those wrappers are needed to use locale functions in __acquire_category,

// all functions have to present the same prototype.

static void* _Loc_ctype_create(const char * s, _Locale_name_hint* hint, int *__err_code)

{ return _Locale_ctype_create(s, hint, __err_code); }

static void* _Loc_codecvt_create(const char * s, _Locale_name_hint* hint, int *__err_code)

{ return _Locale_codecvt_create(s, hint, __err_code); }

static void* _Loc_numeric_create(const char * s, _Locale_name_hint* hint, int *__err_code)

{ return _Locale_numeric_create(s, hint, __err_code); }

static void* _Loc_time_create(const char * s, _Locale_name_hint* hint, int *__err_code)

{ return _Locale_time_create(s, hint, __err_code); }

static void* _Loc_collate_create(const char * s, _Locale_name_hint* hint, int *__err_code)

{ return _Locale_collate_create(s, hint, __err_code); }

static void* _Loc_monetary_create(const char * s, _Locale_name_hint* hint, int *__err_code)

{ return _Locale_monetary_create(s, hint, __err_code); }

static void* _Loc_messages_create(const char * s, _Locale_name_hint* hint, int *__err_code)

{ return _Locale_messages_create(s, hint, __err_code); }

static char const* _Loc_ctype_name(void* l, char* s)

{ return _Locale_ctype_name((_Locale_ctype*)l, s); }

static char const* _Loc_codecvt_name(void* l, char* s)

{ return _Locale_codecvt_name((_Locale_codecvt*)l, s); }

static char const* _Loc_numeric_name(void* l, char* s)

{ return _Locale_numeric_name((_Locale_numeric*)l, s); }

static char const* _Loc_time_name(void* l, char* s)

{ return _Locale_time_name((_Locale_time*)l, s); }

static char const* _Loc_collate_name(void* l, char* s)

{ return _Locale_collate_name((_Locale_collate*)l, s); }

static char const* _Loc_monetary_name(void* l, char* s)

{ return _Locale_monetary_name((_Locale_monetary*)l, s); }

static char const* _Loc_messages_name(void* l, char* s)

{ return _Locale_messages_name((_Locale_messages*)l, s); }

static const char* _Loc_ctype_default(char* p)

{ return _Locale_ctype_default(p); }

static const char* _Loc_numeric_default(char * p)

{ return _Locale_numeric_default(p); }

static const char* _Loc_time_default(char* p)

{ return _Locale_time_default(p); }

static const char* _Loc_collate_default(char* p)

{ return _Locale_collate_default(p); }

static const char* _Loc_monetary_default(char* p)

{ return _Locale_monetary_default(p); }

static const char* _Loc_messages_default(char* p)

{ return _Locale_messages_default(p); }

static void _Loc_ctype_destroy(void* p)    {_Locale_ctype_destroy((_Locale_ctype*)p); }

static void _Loc_codecvt_destroy(void* p)    {_Locale_codecvt_destroy((_Locale_codecvt*)p); }

static void _Loc_numeric_destroy(void* p)  {_Locale_numeric_destroy((_Locale_numeric*)p); }

static void _Loc_time_destroy(void* p)     {_Locale_time_destroy((_Locale_time*)p);}

static void _Loc_collate_destroy(void* p)  {_Locale_collate_destroy((_Locale_collate*)p);}

static void _Loc_monetary_destroy(void* p) {_Locale_monetary_destroy((_Locale_monetary*)p);}

static void _Loc_messages_destroy(void* p) {_Locale_messages_destroy((_Locale_messages*)p);}

typedef void* (*loc_create_func_t)(const char *, _Locale_name_hint*, int *__err_code);

typedef char const* (*loc_name_func_t)(void* l, char* s);

typedef void (*loc_destroy_func_t)(void* l);

typedef const char* (*loc_default_name_func_t)(char* s);

typedef char const* (*loc_extract_name_func_t)(const char*, char*, _Locale_name_hint*, int *__err_code);

//----------------------------------------------------------------------

// Acquire and release low-level category objects.  The whole point of

// this is so that we don't allocate (say) four different _Locale_ctype

// objects for a single locale.

// Global hash tables for category objects.

typedef unordered_map<string, pair<void*, size_t>, hash<string>, equal_to<string> > Category_Map;

// Look up a category by name

static Category_Map** ctype_hash() {

  static Category_Map *_S_ctype_hash = 0;

  return &_S_ctype_hash;

}

static Category_Map** codecvt_hash() {

  static Category_Map *_S_codecvt_hash = 0;

  return &_S_codecvt_hash;

}

static Category_Map** numeric_hash() {

  static Category_Map *_S_numeric_hash = 0;

  return &_S_numeric_hash;

}

static Category_Map** time_hash() {

  static Category_Map *_S_time_hash = 0;

  return &_S_time_hash;

}

static Category_Map** collate_hash() {

  static Category_Map *_S_collate_hash = 0;

  return &_S_collate_hash;

}

static Category_Map** monetary_hash() {

  static Category_Map *_S_monetary_hash = 0;

  return &_S_monetary_hash;

}

static Category_Map** messages_hash() {

  static Category_Map *_S_messages_hash;

  return &_S_messages_hash;

}

// We have a single lock for all of the hash tables.  We may wish to

// replace it with six different locks.

/* REFERENCED */

static _STLP_STATIC_MUTEX& category_hash_mutex() {

  static _STLP_STATIC_MUTEX lock _STLP_MUTEX_INITIALIZER;

  return lock;

}

static void*

__acquire_category(const char* &name, char *buf, _Locale_name_hint* hint,

                   loc_extract_name_func_t extract_name,

                   loc_create_func_t create_obj, loc_default_name_func_t default_name,

                   Category_Map ** M, int *__err_code) {

#if !defined (__BORLANDC__) || (__BORLANDC__ >= 0x564)

  typedef Category_Map::iterator Category_iterator;

  pair<Category_iterator, bool> result;

#else

#  if !defined(_STLP_DEBUG)

  pair<_Ht_iterator<_Slist_iterator<pair<const string,pair<void *,unsigned int> >,_Nonconst_traits<pair<const string,pair<void *,unsigned int> > > >,_NonLocalHashMapTraitsT<pair<const string,pair<void *,unsigned int> > > >, bool> result;

#  else

  pair<_DBG_iter<_NonDbg_hashtable<pair<const string,pair<void *,unsigned int> >,string,hash<string>,_HashMapTraitsT<pair<const string,pair<void *,unsigned int> > >,_Select1st<pair<const string,pair<void *,unsigned int> > >,_DbgEqual<string,equal_to<string> >,allocator<pair<const string,pair<void *,unsigned int> > > >,_DbgTraits<_NonLocalHashMapTraitsT<pair<const string,pair<void *,unsigned int> > > > >, bool> result;

#  endif

#endif

  *__err_code = _STLP_LOC_UNDEFINED;

  // Find what name to look for. Be careful if user requests the default.

  if (name[0] == 0) {

    name = default_name(buf);

    if (name == 0 || name[0] == 0)

      name = "C";

  }

  else {

    const char* cname = extract_name(name, buf, hint, __err_code);

    if (cname == 0) {

      return 0;

    }

    name = cname;

  }

  Category_Map::value_type __e(name, pair<void*,size_t>((void*)0,size_t(0)));

  _STLP_auto_lock sentry(category_hash_mutex());

  if (!*M)

    *M = new Category_Map();

  // Look for an existing entry with that name.

  result = (*M)->insert(__e);

  if (result.second) {

    // There was no entry in the map already.  Create the category.

    (*result.first).second.first = create_obj(name, hint, __err_code);

    if (!(*result.first).second.first) {

      (*M)->erase(result.first);

#if defined (_STLP_LEAKS_PEDANTIC)

      if ((*M)->empty()) {

        delete *M;

        *M = 0;

      }

#endif

      return 0;

    }

  }

  // Increment the reference count.

  ++((*result.first).second.second);

  return (*result.first).second.first;

}

static void

__release_category(void* cat,

                   loc_destroy_func_t destroy_fun,

                   loc_name_func_t get_name,

                   Category_Map** M) {

  Category_Map *pM = *M;

  if (cat && pM) {

    // Find the name of the category object.

    char buf[_Locale_MAX_SIMPLE_NAME + 1];

    char const* name = get_name(cat, buf);

    if (name != 0) {

      _STLP_auto_lock sentry(category_hash_mutex());

      Category_Map::iterator it = pM->find(name);

      if (it != pM->end()) {

        // Decrement the ref count.  If it goes to zero, delete this category

        // from the map.

        if (--((*it).second.second) == 0) {

          void* cat1 = (*it).second.first;

          destroy_fun(cat1);

          pM->erase(it);

#if defined (_STLP_LEAKS_PEDANTIC)

          if (pM->empty()) {

            delete pM;

            *M = 0;

          }

#endif

        }

      }

    }

  }

}

_Locale_ctype* _STLP_CALL __acquire_ctype(const char* &name, char *buf, _Locale_name_hint* hint, int *__err_code) {

  return __REINTERPRET_CAST(_Locale_ctype*, __acquire_category(name, buf, hint,

                                                               _Locale_extract_ctype_name, _Loc_ctype_create, _Loc_ctype_default,

                                                               ctype_hash(), __err_code));

}

_Locale_codecvt* _STLP_CALL __acquire_codecvt(const char* &name, char *buf, _Locale_name_hint* hint, int *__err_code) {

  return __REINTERPRET_CAST(_Locale_codecvt*, __acquire_category(name, buf, hint,

                                                                 _Locale_extract_ctype_name, _Loc_codecvt_create, _Loc_ctype_default,

                                                                 codecvt_hash(), __err_code));

}

_Locale_numeric* _STLP_CALL __acquire_numeric(const char* &name, char *buf, _Locale_name_hint* hint, int *__err_code) {

  return __REINTERPRET_CAST(_Locale_numeric*, __acquire_category(name, buf, hint,

                                                                 _Locale_extract_numeric_name, _Loc_numeric_create, _Loc_numeric_default,

                                                                 numeric_hash(), __err_code));

}

_Locale_time* _STLP_CALL __acquire_time(const char* &name, char *buf, _Locale_name_hint* hint, int *__err_code) {

  return __REINTERPRET_CAST(_Locale_time*, __acquire_category(name, buf, hint,

                                                              _Locale_extract_time_name, _Loc_time_create, _Loc_time_default,

                                                              time_hash(), __err_code));

}

_Locale_collate* _STLP_CALL __acquire_collate(const char* &name, char *buf, _Locale_name_hint* hint, int *__err_code) {

  return __REINTERPRET_CAST(_Locale_collate*, __acquire_category(name, buf, hint,

                                                                 _Locale_extract_collate_name, _Loc_collate_create, _Loc_collate_default,

                                                                 collate_hash(), __err_code));

}

_Locale_monetary* _STLP_CALL __acquire_monetary(const char* &name, char *buf, _Locale_name_hint* hint, int *__err_code) {

  return __REINTERPRET_CAST(_Locale_monetary*, __acquire_category(name, buf, hint,

                                                                  _Locale_extract_monetary_name, _Loc_monetary_create, _Loc_monetary_default,

                                                                  monetary_hash(), __err_code));

}

_Locale_messages* _STLP_CALL __acquire_messages(const char* &name, char *buf, _Locale_name_hint* hint, int *__err_code) {

  return __REINTERPRET_CAST(_Locale_messages*, __acquire_category(name, buf, hint,

                                                                  _Locale_extract_messages_name, _Loc_messages_create, _Loc_messages_default,

                                                                  messages_hash(), __err_code));

}

void _STLP_CALL __release_ctype(_Locale_ctype* cat)

{ __release_category(cat, _Loc_ctype_destroy, _Loc_ctype_name, ctype_hash()); }

void _STLP_CALL __release_codecvt(_Locale_codecvt* cat)

{ __release_category(cat, _Loc_codecvt_destroy, _Loc_codecvt_name, codecvt_hash()); }

void _STLP_CALL __release_numeric(_Locale_numeric* cat)

{ __release_category(cat, _Loc_numeric_destroy, _Loc_numeric_name, numeric_hash()); }

void _STLP_CALL __release_time(_Locale_time* cat)

{ __release_category(cat, _Loc_time_destroy, _Loc_time_name, time_hash()); }

void _STLP_CALL __release_collate(_Locale_collate* cat)

{ __release_category(cat, _Loc_collate_destroy, _Loc_collate_name, collate_hash()); }

void _STLP_CALL __release_monetary(_Locale_monetary* cat)

{ __release_category(cat, _Loc_monetary_destroy, _Loc_monetary_name, monetary_hash()); }

void _STLP_CALL __release_messages(_Locale_messages* cat)

{ __release_category(cat, _Loc_messages_destroy, _Loc_messages_name, messages_hash()); }

_STLP_MOVE_TO_STD_NAMESPACE

_STLP_END_NAMESPACE