1 /* Copyright (C) 1991, 1992, 1995, 1996, 1997 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Library General Public License as
6 published by the Free Software Foundation; either version 2 of the
7 License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
14 You should have received a copy of the GNU Library General Public
15 License along with the GNU C Library; see the file COPYING.LIB. If not,
16 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 Boston, MA 02111-1307, USA. */
22 #include <libc-lock.h>
28 #include "localeinfo.h"
30 /* For each category declare two external variables (with weak references):
31 extern const struct locale_data *_nl_current_CATEGORY;
32 This points to the current locale's in-core data for CATEGORY.
33 extern const struct locale_data _nl_C_CATEGORY;
34 This contains the built-in "C"/"POSIX" locale's data for CATEGORY.
35 Both are weak references; if &_nl_current_CATEGORY is zero,
36 then nothing is using the locale data. */
37 #define DEFINE_CATEGORY(category, category_name, items, a, b, c, d) \
38 extern struct locale_data *_nl_current_##category; \
39 extern struct locale_data _nl_C_##category; \
40 weak_extern (_nl_current_##category) weak_extern (_nl_C_##category)
41 #include "categories.def"
42 #undef DEFINE_CATEGORY
44 /* Array indexed by category of pointers to _nl_current_CATEGORY slots.
45 Elements are zero for categories whose data is never used. */
46 static struct locale_data
* *const _nl_current
[] =
48 #define DEFINE_CATEGORY(category, category_name, items, a, b, c, d) \
49 [category] = &_nl_current_##category,
50 #include "categories.def"
51 #undef DEFINE_CATEGORY
52 /* We need this additional element to simplify the code. It must
54 [LC_ALL
] = (struct locale_data
**) ~0ul
57 /* Array indexed by category of pointers to _nl_C_CATEGORY slots.
58 Elements are zero for categories whose data is never used. */
59 struct locale_data
*const _nl_C
[] =
61 #define DEFINE_CATEGORY(category, category_name, items, a, b, c, d) \
62 [category] = &_nl_C_##category,
63 #include "categories.def"
64 #undef DEFINE_CATEGORY
68 /* Define an array of category names (also the environment variable names),
69 indexed by integral category. */
70 const char *const _nl_category_names
[] =
72 #define DEFINE_CATEGORY(category, category_name, items, a, b, c, d) \
73 [category] = category_name,
74 #include "categories.def"
75 #undef DEFINE_CATEGORY
78 /* An array of their lengths, for convenience. */
79 const size_t _nl_category_name_sizes
[] =
81 #define DEFINE_CATEGORY(category, category_name, items, a, b, c, d) \
82 [category] = sizeof (category_name) - 1,
83 #include "categories.def"
84 #undef DEFINE_CATEGORY
85 [LC_ALL
] = sizeof ("LC_ALL") - 1
89 /* Declare the postload functions used below. */
91 #define NO_POSTLOAD _nl_postload_ctype /* Harmless thing known to exist. */
92 #define DEFINE_CATEGORY(category, category_name, items, postload, b, c, d) \
93 extern void postload (void);
94 #include "categories.def"
95 #undef DEFINE_CATEGORY
98 /* Define an array indexed by category of postload functions to call after
99 loading and installing that category's data. */
100 static void (*const _nl_category_postload
[]) (void) =
102 #define DEFINE_CATEGORY(category, category_name, items, postload, b, c, d) \
103 [category] = postload,
104 #include "categories.def"
105 #undef DEFINE_CATEGORY
109 /* Name of current locale for each individual category.
110 Each is malloc'd unless it is nl_C_name. */
111 static const char *_nl_current_names
[] =
113 #define DEFINE_CATEGORY(category, category_name, items, a, b, c, d) \
114 [category] = _nl_C_name,
115 #include "categories.def"
116 #undef DEFINE_CATEGORY
117 [LC_ALL
] = _nl_C_name
/* For LC_ALL. */
121 /* Lock for protecting global data. */
122 __libc_lock_define_initialized (, __libc_setlocale_lock
)
125 /* Use this when we come along an error. */
126 #define ERROR_RETURN \
128 __set_errno (EINVAL); \
134 clever_copy (const char *string
)
139 if (strcmp (string
, "C") == 0 || strcmp (string
, "POSIX") == 0)
140 /* This return is dangerous because the returned string might be
141 placed in read-only memory. But everything should be set up to
143 return (char *) _nl_C_name
;
145 len
= strlen (string
) + 1;
146 new = (char *) malloc (len
);
147 return new != NULL
? memcpy (new, string
, len
) : NULL
;
151 /* Construct a new composite name. */
153 new_composite_name (int category
, const char *newnames
[LC_ALL
])
161 for (i
= 0; i
< LC_ALL
; ++i
)
163 const char *name
= (category
== LC_ALL
? newnames
[i
] :
164 category
== i
? newnames
[0] :
165 _nl_current_names
[i
]);
166 last_len
= strlen (name
);
167 cumlen
+= _nl_category_name_sizes
[i
] + 1 + last_len
+ 1;
168 if (i
> 0 && same
&& strcmp (name
, newnames
[0]) != 0)
174 /* All the categories use the same name. */
175 if (strcmp (newnames
[0], "C") == 0 || strcmp (newnames
[0], "POSIX") == 0)
176 return (char *) _nl_C_name
;
178 new = malloc (last_len
+ 1);
180 return new == NULL
? NULL
: memcpy (new, newnames
[0], last_len
+ 1);
183 new = malloc (cumlen
);
187 for (i
= 0; i
< LC_ALL
; ++i
)
189 /* Add "CATEGORY=NAME;" to the string. */
190 const char *name
= (category
== LC_ALL
? newnames
[i
] :
191 category
== i
? newnames
[0] :
192 _nl_current_names
[i
]);
193 p
= __stpcpy (p
, _nl_category_names
[i
]);
195 p
= __stpcpy (p
, name
);
198 p
[-1] = '\0'; /* Clobber the last ';'. */
203 /* Put NAME in _nl_current_names. */
205 setname (int category
, const char *name
)
207 if (_nl_current
[category
] == NULL
208 && _nl_current_names
[category
] != _nl_C_name
)
209 free ((void *) _nl_current_names
[category
]);
211 _nl_current_names
[category
] = name
;
215 /* Put DATA in *_nl_current[CATEGORY]. */
217 setdata (int category
, struct locale_data
*data
)
219 if (_nl_current
[category
] != NULL
)
221 *_nl_current
[category
] = data
;
222 if (_nl_category_postload
[category
])
223 (*_nl_category_postload
[category
]) ();
229 setlocale (int category
, const char *locale
)
232 size_t locale_path_len
;
233 const char *locpath_var
;
236 /* Sanity check for CATEGORY argument. */
237 if (category
< 0 || category
> LC_ALL
)
240 /* Does user want name of current locale? */
242 return (char *) _nl_current_names
[category
];
244 if (strcmp (locale
, _nl_current_names
[category
]) == 0)
245 /* Changing to the same thing. */
246 return (char *) _nl_current_names
[category
];
248 /* We perhaps really have to load some data. So we determine the
249 path in which to look for the data now. The environment variable
250 `LOCPATH' must only be used when the binary has no SUID or SGID
255 locpath_var
= __secure_getenv ("LOCPATH");
256 if (locpath_var
!= NULL
&& locpath_var
[0] != '\0')
257 if (__argz_create_sep (locpath_var
, ':',
258 &locale_path
, &locale_path_len
) != 0)
261 if (__argz_add_sep (&locale_path
, &locale_path_len
, LOCALE_PATH
, ':') != 0)
264 if (category
== LC_ALL
)
266 /* The user wants to set all categories. The desired locales
267 for the individual categories can be selected by using a
268 composite locale name. This is a semi-colon separated list
269 of entries of the form `CATEGORY=VALUE'. */
270 const char *newnames
[LC_ALL
];
271 struct locale_data
*newdata
[LC_ALL
];
273 /* Set all name pointers to the argument name. */
274 for (category
= 0; category
< LC_ALL
; ++category
)
275 newnames
[category
] = (char *) locale
;
277 if (strchr (locale
, ';') != NULL
)
279 /* This is a composite name. Make a copy and split it up. */
280 char *np
= strdupa (locale
);
284 while ((cp
= strchr (np
, '=')) != NULL
)
286 for (cnt
= 0; cnt
< LC_ALL
; ++cnt
)
287 if ((size_t) (cp
- np
) == _nl_category_name_sizes
[cnt
]
288 && memcmp (np
, _nl_category_names
[cnt
], cp
- np
) == 0)
292 /* Bogus category name. */
295 /* Found the category this clause sets. */
296 newnames
[cnt
] = ++cp
;
297 cp
= strchr (cp
, ';');
300 /* Examine the next clause. */
305 /* This was the last clause. We are done. */
309 for (cnt
= 0; cnt
< LC_ALL
; ++cnt
)
310 if (newnames
[cnt
] == locale
)
311 /* The composite name did not specify all categories. */
315 /* Protect global data. */
316 __libc_lock_lock (__libc_setlocale_lock
);
318 /* Load the new data for each category. */
319 while (category
-- > 0)
321 newdata
[category
] = _nl_find_locale (locale_path
, locale_path_len
,
323 &newnames
[category
]);
325 if (newdata
[category
] == NULL
)
328 /* We must not simply free a global locale since we have no
329 control over the usage. So we mark it as un-deletable. */
330 if (newdata
[category
]->usage_count
!= MAX_USAGE_COUNT
)
331 newdata
[category
]->usage_count
= MAX_USAGE_COUNT
;
334 /* Create new composite name. */
336 || (composite
= new_composite_name (LC_ALL
, newnames
)) == NULL
)
337 /* Loading this part of the locale failed. Abort the
342 /* Now we have loaded all the new data. Put it in place. */
343 for (category
= 0; category
< LC_ALL
; ++category
)
345 setdata (category
, newdata
[category
]);
346 setname (category
, newnames
[category
]);
348 setname (LC_ALL
, composite
);
351 /* Critical section left. */
352 __libc_lock_unlock (__libc_setlocale_lock
);
358 struct locale_data
*newdata
= NULL
;
359 const char *newname
= locale
;
361 /* Protect global data. */
362 __libc_lock_lock (__libc_setlocale_lock
);
364 if (_nl_current
[category
] != NULL
)
366 /* Only actually load the data if anything will use it. */
367 newdata
= _nl_find_locale (locale_path
, locale_path_len
, category
,
372 /* We must not simply free a global locale since we have no
373 control over the usage. So we mark it as un-deletable. */
374 if (newdata
->usage_count
!= MAX_USAGE_COUNT
)
375 newdata
->usage_count
= MAX_USAGE_COUNT
;
378 /* Create new composite name. */
379 composite
= new_composite_name (category
, &newname
);
380 if (composite
== NULL
)
382 /* Say that we don't have any data loaded. */
388 if (_nl_current
[category
] != NULL
)
389 setdata (category
, newdata
);
391 setname (category
, newname
);
392 setname (LC_ALL
, composite
);
395 /* Critical section left. */
396 __libc_lock_unlock (__libc_setlocale_lock
);
398 return (char *) newname
;