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#include "stlport_prefix.h"
19
20#include <hash_map>
21#include <string>
22
23#include <locale>
24#include <istream>
25
26#include "c_locale.h"
27#include "locale_impl.h"
28#include "acquire_release.h"
29
30_STLP_BEGIN_NAMESPACE
31_STLP_MOVE_TO_PRIV_NAMESPACE
32
33// Those wrappers are needed to use locale functions in __acquire_category,
34// all functions have to present the same prototype.
35
36static void* _Loc_ctype_create(const char * s, _Locale_name_hint* hint, int *__err_code)
37{ return _Locale_ctype_create(s, hint, __err_code); }
38static void* _Loc_codecvt_create(const char * s, _Locale_name_hint* hint, int *__err_code)
39{ return _Locale_codecvt_create(s, hint, __err_code); }
40static void* _Loc_numeric_create(const char * s, _Locale_name_hint* hint, int *__err_code)
41{ return _Locale_numeric_create(s, hint, __err_code); }
42static void* _Loc_time_create(const char * s, _Locale_name_hint* hint, int *__err_code)
43{ return _Locale_time_create(s, hint, __err_code); }
44static void* _Loc_collate_create(const char * s, _Locale_name_hint* hint, int *__err_code)
45{ return _Locale_collate_create(s, hint, __err_code); }
46static void* _Loc_monetary_create(const char * s, _Locale_name_hint* hint, int *__err_code)
47{ return _Locale_monetary_create(s, hint, __err_code); }
48static void* _Loc_messages_create(const char * s, _Locale_name_hint* hint, int *__err_code)
49{ return _Locale_messages_create(s, hint, __err_code); }
50
51static char const* _Loc_ctype_name(void* l, char* s)
52{ return _Locale_ctype_name((_Locale_ctype*)l, s); }
53static char const* _Loc_codecvt_name(void* l, char* s)
54{ return _Locale_codecvt_name((_Locale_codecvt*)l, s); }
55static char const* _Loc_numeric_name(void* l, char* s)
56{ return _Locale_numeric_name((_Locale_numeric*)l, s); }
57static char const* _Loc_time_name(void* l, char* s)
58{ return _Locale_time_name((_Locale_time*)l, s); }
59static char const* _Loc_collate_name(void* l, char* s)
60{ return _Locale_collate_name((_Locale_collate*)l, s); }
61static char const* _Loc_monetary_name(void* l, char* s)
62{ return _Locale_monetary_name((_Locale_monetary*)l, s); }
63static char const* _Loc_messages_name(void* l, char* s)
64{ return _Locale_messages_name((_Locale_messages*)l, s); }
65
66static const char* _Loc_ctype_default(char* p)
67{ return _Locale_ctype_default(p); }
68static const char* _Loc_numeric_default(char * p)
69{ return _Locale_numeric_default(p); }
70static const char* _Loc_time_default(char* p)
71{ return _Locale_time_default(p); }
72static const char* _Loc_collate_default(char* p)
73{ return _Locale_collate_default(p); }
74static const char* _Loc_monetary_default(char* p)
75{ return _Locale_monetary_default(p); }
76static const char* _Loc_messages_default(char* p)
77{ return _Locale_messages_default(p); }
78
79static void _Loc_ctype_destroy(void* p)    {_Locale_ctype_destroy((_Locale_ctype*)p); }
80static void _Loc_codecvt_destroy(void* p)    {_Locale_codecvt_destroy((_Locale_codecvt*)p); }
81static void _Loc_numeric_destroy(void* p)  {_Locale_numeric_destroy((_Locale_numeric*)p); }
82static void _Loc_time_destroy(void* p)     {_Locale_time_destroy((_Locale_time*)p);}
83static void _Loc_collate_destroy(void* p)  {_Locale_collate_destroy((_Locale_collate*)p);}
84static void _Loc_monetary_destroy(void* p) {_Locale_monetary_destroy((_Locale_monetary*)p);}
85static void _Loc_messages_destroy(void* p) {_Locale_messages_destroy((_Locale_messages*)p);}
86
87typedef void* (*loc_create_func_t)(const char *, _Locale_name_hint*, int *__err_code);
88typedef char const* (*loc_name_func_t)(void* l, char* s);
89typedef void (*loc_destroy_func_t)(void* l);
90typedef const char* (*loc_default_name_func_t)(char* s);
91typedef char const* (*loc_extract_name_func_t)(const char*, char*, _Locale_name_hint*, int *__err_code);
92
93//----------------------------------------------------------------------
94// Acquire and release low-level category objects.  The whole point of
95// this is so that we don't allocate (say) four different _Locale_ctype
96// objects for a single locale.
97
98// Global hash tables for category objects.
99typedef hash_map<string, pair<void*, size_t>, hash<string>, equal_to<string> > Category_Map;
100
101// Look up a category by name
102static Category_Map** ctype_hash() {
103  static Category_Map *_S_ctype_hash = 0;
104  return &_S_ctype_hash;
105}
106static Category_Map** codecvt_hash() {
107  static Category_Map *_S_codecvt_hash = 0;
108  return &_S_codecvt_hash;
109}
110static Category_Map** numeric_hash() {
111  static Category_Map *_S_numeric_hash = 0;
112  return &_S_numeric_hash;
113}
114static Category_Map** time_hash() {
115  static Category_Map *_S_time_hash = 0;
116  return &_S_time_hash;
117}
118static Category_Map** collate_hash() {
119  static Category_Map *_S_collate_hash = 0;
120  return &_S_collate_hash;
121}
122static Category_Map** monetary_hash() {
123  static Category_Map *_S_monetary_hash = 0;
124  return &_S_monetary_hash;
125}
126static Category_Map** messages_hash() {
127  static Category_Map *_S_messages_hash;
128  return &_S_messages_hash;
129}
130
131// We have a single lock for all of the hash tables.  We may wish to
132// replace it with six different locks.
133/* REFERENCED */
134static _STLP_STATIC_MUTEX& category_hash_mutex() {
135  static _STLP_STATIC_MUTEX lock _STLP_MUTEX_INITIALIZER;
136  return lock;
137}
138
139static void*
140__acquire_category(const char* &name, char *buf, _Locale_name_hint* hint,
141                   loc_extract_name_func_t extract_name,
142                   loc_create_func_t create_obj, loc_default_name_func_t default_name,
143                   Category_Map ** M, int *__err_code) {
144#if !defined (__BORLANDC__) || (__BORLANDC__ >= 0x564)
145  typedef Category_Map::iterator Category_iterator;
146  pair<Category_iterator, bool> result;
147#else
148#  if !defined(_STLP_DEBUG)
149  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;
150#  else
151  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;
152#  endif
153#endif
154
155  *__err_code = _STLP_LOC_UNDEFINED;
156
157  // Find what name to look for. Be careful if user requests the default.
158  if (name[0] == 0) {
159    name = default_name(buf);
160    if (name == 0 || name[0] == 0)
161      name = "C";
162  }
163  else {
164    const char* cname = extract_name(name, buf, hint, __err_code);
165    if (cname == 0) {
166      return 0;
167    }
168    name = cname;
169  }
170
171  Category_Map::value_type __e(name, pair<void*,size_t>((void*)0,size_t(0)));
172
173  _STLP_auto_lock sentry(category_hash_mutex());
174
175  if (!*M)
176    *M = new Category_Map();
177
178  // Look for an existing entry with that name.
179  result = (*M)->insert_noresize(__e);
180
181  if (result.second) {
182    // There was no entry in the map already.  Create the category.
183    (*result.first).second.first = create_obj(name, hint, __err_code);
184    if (!(*result.first).second.first) {
185      (*M)->erase(result.first);
186#if defined (_STLP_LEAKS_PEDANTIC)
187      if ((*M)->empty()) {
188        delete *M;
189        *M = 0;
190      }
191#endif
192      return 0;
193    }
194  }
195
196  // Increment the reference count.
197  ++((*result.first).second.second);
198
199  return (*result.first).second.first;
200}
201
202static void
203__release_category(void* cat,
204                   loc_destroy_func_t destroy_fun,
205                   loc_name_func_t get_name,
206                   Category_Map** M) {
207  Category_Map *pM = *M;
208
209  if (cat && pM) {
210    // Find the name of the category object.
211    char buf[_Locale_MAX_SIMPLE_NAME + 1];
212    char const* name = get_name(cat, buf);
213
214    if (name != 0) {
215      _STLP_auto_lock sentry(category_hash_mutex());
216      Category_Map::iterator it = pM->find(name);
217      if (it != pM->end()) {
218        // Decrement the ref count.  If it goes to zero, delete this category
219        // from the map.
220        if (--((*it).second.second) == 0) {
221          void* cat1 = (*it).second.first;
222          destroy_fun(cat1);
223          pM->erase(it);
224#if defined (_STLP_LEAKS_PEDANTIC)
225          if (pM->empty()) {
226            delete pM;
227            *M = 0;
228          }
229#endif
230        }
231      }
232    }
233  }
234}
235
236_Locale_ctype* _STLP_CALL __acquire_ctype(const char* &name, char *buf, _Locale_name_hint* hint, int *__err_code) {
237  return __REINTERPRET_CAST(_Locale_ctype*, __acquire_category(name, buf, hint,
238                                                               _Locale_extract_ctype_name, _Loc_ctype_create, _Loc_ctype_default,
239                                                               ctype_hash(), __err_code));
240}
241_Locale_codecvt* _STLP_CALL __acquire_codecvt(const char* &name, char *buf, _Locale_name_hint* hint, int *__err_code) {
242  return __REINTERPRET_CAST(_Locale_codecvt*, __acquire_category(name, buf, hint,
243                                                                 _Locale_extract_ctype_name, _Loc_codecvt_create, _Loc_ctype_default,
244                                                                 codecvt_hash(), __err_code));
245}
246_Locale_numeric* _STLP_CALL __acquire_numeric(const char* &name, char *buf, _Locale_name_hint* hint, int *__err_code) {
247  return __REINTERPRET_CAST(_Locale_numeric*, __acquire_category(name, buf, hint,
248                                                                 _Locale_extract_numeric_name, _Loc_numeric_create, _Loc_numeric_default,
249                                                                 numeric_hash(), __err_code));
250}
251_Locale_time* _STLP_CALL __acquire_time(const char* &name, char *buf, _Locale_name_hint* hint, int *__err_code) {
252  return __REINTERPRET_CAST(_Locale_time*, __acquire_category(name, buf, hint,
253                                                              _Locale_extract_time_name, _Loc_time_create, _Loc_time_default,
254                                                              time_hash(), __err_code));
255}
256_Locale_collate* _STLP_CALL __acquire_collate(const char* &name, char *buf, _Locale_name_hint* hint, int *__err_code) {
257  return __REINTERPRET_CAST(_Locale_collate*, __acquire_category(name, buf, hint,
258                                                                 _Locale_extract_collate_name, _Loc_collate_create, _Loc_collate_default,
259                                                                 collate_hash(), __err_code));
260}
261_Locale_monetary* _STLP_CALL __acquire_monetary(const char* &name, char *buf, _Locale_name_hint* hint, int *__err_code) {
262  return __REINTERPRET_CAST(_Locale_monetary*, __acquire_category(name, buf, hint,
263                                                                  _Locale_extract_monetary_name, _Loc_monetary_create, _Loc_monetary_default,
264                                                                  monetary_hash(), __err_code));
265}
266_Locale_messages* _STLP_CALL __acquire_messages(const char* &name, char *buf, _Locale_name_hint* hint, int *__err_code) {
267  return __REINTERPRET_CAST(_Locale_messages*, __acquire_category(name, buf, hint,
268                                                                  _Locale_extract_messages_name, _Loc_messages_create, _Loc_messages_default,
269                                                                  messages_hash(), __err_code));
270}
271
272void _STLP_CALL __release_ctype(_Locale_ctype* cat)
273{ __release_category(cat, _Loc_ctype_destroy, _Loc_ctype_name, ctype_hash()); }
274void _STLP_CALL __release_codecvt(_Locale_codecvt* cat)
275{ __release_category(cat, _Loc_codecvt_destroy, _Loc_codecvt_name, codecvt_hash()); }
276void _STLP_CALL __release_numeric(_Locale_numeric* cat)
277{ __release_category(cat, _Loc_numeric_destroy, _Loc_numeric_name, numeric_hash()); }
278void _STLP_CALL __release_time(_Locale_time* cat)
279{ __release_category(cat, _Loc_time_destroy, _Loc_time_name, time_hash()); }
280void _STLP_CALL __release_collate(_Locale_collate* cat)
281{ __release_category(cat, _Loc_collate_destroy, _Loc_collate_name, collate_hash()); }
282void _STLP_CALL __release_monetary(_Locale_monetary* cat)
283{ __release_category(cat, _Loc_monetary_destroy, _Loc_monetary_name, monetary_hash()); }
284void _STLP_CALL __release_messages(_Locale_messages* cat)
285{ __release_category(cat, _Loc_messages_destroy, _Loc_messages_name, messages_hash()); }
286
287_STLP_MOVE_TO_STD_NAMESPACE
288_STLP_END_NAMESPACE
289