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author | RincewindsHat <12514511+RincewindsHat@users.noreply.github.com> | 2023-01-31 14:46:01 +0100 |
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committer | RincewindsHat <12514511+RincewindsHat@users.noreply.github.com> | 2023-01-31 14:46:01 +0100 |
commit | e8bd88d1fcded01ccd066572eeaae1b507989cb3 (patch) | |
tree | c8e7be6c07c6f635f6e803e6a6ba9e7a95fee7c0 /gl/setlocale_null.c | |
parent | 2ad962c13473607ca0d974bfaa516a0ed53ec73d (diff) | |
download | monitoring-plugins-e8bd88d1fcded01ccd066572eeaae1b507989cb3.tar.gz |
Sync with the latest Gnulib code 668c0b8ffa
Diffstat (limited to 'gl/setlocale_null.c')
-rw-r--r-- | gl/setlocale_null.c | 411 |
1 files changed, 411 insertions, 0 deletions
diff --git a/gl/setlocale_null.c b/gl/setlocale_null.c new file mode 100644 index 00000000..6ac563db --- /dev/null +++ b/gl/setlocale_null.c | |||
@@ -0,0 +1,411 @@ | |||
1 | /* Query the name of the current global locale. | ||
2 | Copyright (C) 2019-2023 Free Software Foundation, Inc. | ||
3 | |||
4 | This file is free software: you can redistribute it and/or modify | ||
5 | it under the terms of the GNU Lesser General Public License as | ||
6 | published by the Free Software Foundation; either version 2.1 of the | ||
7 | License, or (at your option) any later version. | ||
8 | |||
9 | This file 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 | ||
12 | GNU Lesser General Public License for more details. | ||
13 | |||
14 | You should have received a copy of the GNU Lesser General Public License | ||
15 | along with this program. If not, see <https://www.gnu.org/licenses/>. */ | ||
16 | |||
17 | /* Written by Bruno Haible <bruno@clisp.org>, 2019. */ | ||
18 | |||
19 | #include <config.h> | ||
20 | |||
21 | /* Specification. */ | ||
22 | #include "setlocale_null.h" | ||
23 | |||
24 | #include <errno.h> | ||
25 | #include <locale.h> | ||
26 | #include <stdlib.h> | ||
27 | #include <string.h> | ||
28 | #if defined _WIN32 && !defined __CYGWIN__ | ||
29 | # include <wchar.h> | ||
30 | #endif | ||
31 | |||
32 | #if !(SETLOCALE_NULL_ALL_MTSAFE && SETLOCALE_NULL_ONE_MTSAFE) | ||
33 | # if defined _WIN32 && !defined __CYGWIN__ | ||
34 | |||
35 | # define WIN32_LEAN_AND_MEAN /* avoid including junk */ | ||
36 | # include <windows.h> | ||
37 | |||
38 | # elif HAVE_PTHREAD_API | ||
39 | |||
40 | # include <pthread.h> | ||
41 | # if HAVE_THREADS_H && HAVE_WEAK_SYMBOLS | ||
42 | # include <threads.h> | ||
43 | # pragma weak thrd_exit | ||
44 | # define c11_threads_in_use() (thrd_exit != NULL) | ||
45 | # else | ||
46 | # define c11_threads_in_use() 0 | ||
47 | # endif | ||
48 | |||
49 | # elif HAVE_THREADS_H | ||
50 | |||
51 | # include <threads.h> | ||
52 | |||
53 | # endif | ||
54 | #endif | ||
55 | |||
56 | /* Use the system's setlocale() function, not the gnulib override, here. */ | ||
57 | #undef setlocale | ||
58 | |||
59 | static const char * | ||
60 | setlocale_null_androidfix (int category) | ||
61 | { | ||
62 | const char *result = setlocale (category, NULL); | ||
63 | |||
64 | #ifdef __ANDROID__ | ||
65 | if (result == NULL) | ||
66 | switch (category) | ||
67 | { | ||
68 | case LC_CTYPE: | ||
69 | case LC_NUMERIC: | ||
70 | case LC_TIME: | ||
71 | case LC_COLLATE: | ||
72 | case LC_MONETARY: | ||
73 | case LC_MESSAGES: | ||
74 | case LC_ALL: | ||
75 | case LC_PAPER: | ||
76 | case LC_NAME: | ||
77 | case LC_ADDRESS: | ||
78 | case LC_TELEPHONE: | ||
79 | case LC_MEASUREMENT: | ||
80 | result = "C"; | ||
81 | break; | ||
82 | default: | ||
83 | break; | ||
84 | } | ||
85 | #endif | ||
86 | |||
87 | return result; | ||
88 | } | ||
89 | |||
90 | static int | ||
91 | setlocale_null_unlocked (int category, char *buf, size_t bufsize) | ||
92 | { | ||
93 | #if defined _WIN32 && !defined __CYGWIN__ && defined _MSC_VER | ||
94 | /* On native Windows, nowadays, the setlocale() implementation is based | ||
95 | on _wsetlocale() and uses malloc() for the result. We are better off | ||
96 | using _wsetlocale() directly. */ | ||
97 | const wchar_t *result = _wsetlocale (category, NULL); | ||
98 | |||
99 | if (result == NULL) | ||
100 | { | ||
101 | /* CATEGORY is invalid. */ | ||
102 | if (bufsize > 0) | ||
103 | /* Return an empty string in BUF. | ||
104 | This is a convenience for callers that don't want to write explicit | ||
105 | code for handling EINVAL. */ | ||
106 | buf[0] = '\0'; | ||
107 | return EINVAL; | ||
108 | } | ||
109 | else | ||
110 | { | ||
111 | size_t length = wcslen (result); | ||
112 | if (length < bufsize) | ||
113 | { | ||
114 | size_t i; | ||
115 | |||
116 | /* Convert wchar_t[] -> char[], assuming plain ASCII. */ | ||
117 | for (i = 0; i <= length; i++) | ||
118 | buf[i] = result[i]; | ||
119 | |||
120 | return 0; | ||
121 | } | ||
122 | else | ||
123 | { | ||
124 | if (bufsize > 0) | ||
125 | { | ||
126 | /* Return a truncated result in BUF. | ||
127 | This is a convenience for callers that don't want to write | ||
128 | explicit code for handling ERANGE. */ | ||
129 | size_t i; | ||
130 | |||
131 | /* Convert wchar_t[] -> char[], assuming plain ASCII. */ | ||
132 | for (i = 0; i < bufsize; i++) | ||
133 | buf[i] = result[i]; | ||
134 | buf[bufsize - 1] = '\0'; | ||
135 | } | ||
136 | return ERANGE; | ||
137 | } | ||
138 | } | ||
139 | #else | ||
140 | const char *result = setlocale_null_androidfix (category); | ||
141 | |||
142 | if (result == NULL) | ||
143 | { | ||
144 | /* CATEGORY is invalid. */ | ||
145 | if (bufsize > 0) | ||
146 | /* Return an empty string in BUF. | ||
147 | This is a convenience for callers that don't want to write explicit | ||
148 | code for handling EINVAL. */ | ||
149 | buf[0] = '\0'; | ||
150 | return EINVAL; | ||
151 | } | ||
152 | else | ||
153 | { | ||
154 | size_t length = strlen (result); | ||
155 | if (length < bufsize) | ||
156 | { | ||
157 | memcpy (buf, result, length + 1); | ||
158 | return 0; | ||
159 | } | ||
160 | else | ||
161 | { | ||
162 | if (bufsize > 0) | ||
163 | { | ||
164 | /* Return a truncated result in BUF. | ||
165 | This is a convenience for callers that don't want to write | ||
166 | explicit code for handling ERANGE. */ | ||
167 | memcpy (buf, result, bufsize - 1); | ||
168 | buf[bufsize - 1] = '\0'; | ||
169 | } | ||
170 | return ERANGE; | ||
171 | } | ||
172 | } | ||
173 | #endif | ||
174 | } | ||
175 | |||
176 | #if !(SETLOCALE_NULL_ALL_MTSAFE && SETLOCALE_NULL_ONE_MTSAFE) /* musl libc, macOS, FreeBSD, NetBSD, OpenBSD, AIX, Haiku, Cygwin */ | ||
177 | |||
178 | /* Use a lock, so that no two threads can invoke setlocale_null_unlocked | ||
179 | at the same time. */ | ||
180 | |||
181 | /* Prohibit renaming this symbol. */ | ||
182 | # undef gl_get_setlocale_null_lock | ||
183 | |||
184 | # if defined _WIN32 && !defined __CYGWIN__ | ||
185 | |||
186 | extern __declspec(dllimport) CRITICAL_SECTION *gl_get_setlocale_null_lock (void); | ||
187 | |||
188 | static int | ||
189 | setlocale_null_with_lock (int category, char *buf, size_t bufsize) | ||
190 | { | ||
191 | CRITICAL_SECTION *lock = gl_get_setlocale_null_lock (); | ||
192 | int ret; | ||
193 | |||
194 | EnterCriticalSection (lock); | ||
195 | ret = setlocale_null_unlocked (category, buf, bufsize); | ||
196 | LeaveCriticalSection (lock); | ||
197 | |||
198 | return ret; | ||
199 | } | ||
200 | |||
201 | # elif HAVE_PTHREAD_API /* musl libc, macOS, FreeBSD, NetBSD, OpenBSD, AIX, Haiku, Cygwin */ | ||
202 | |||
203 | extern | ||
204 | # if defined _WIN32 || defined __CYGWIN__ | ||
205 | __declspec(dllimport) | ||
206 | # endif | ||
207 | pthread_mutex_t *gl_get_setlocale_null_lock (void); | ||
208 | |||
209 | # if HAVE_WEAK_SYMBOLS /* musl libc, FreeBSD, NetBSD, OpenBSD, Haiku */ | ||
210 | |||
211 | /* Avoid the need to link with '-lpthread'. */ | ||
212 | # pragma weak pthread_mutex_lock | ||
213 | # pragma weak pthread_mutex_unlock | ||
214 | |||
215 | /* Determine whether libpthread is in use. */ | ||
216 | # pragma weak pthread_mutexattr_gettype | ||
217 | /* See the comments in lock.h. */ | ||
218 | # define pthread_in_use() \ | ||
219 | (pthread_mutexattr_gettype != NULL || c11_threads_in_use ()) | ||
220 | |||
221 | # else | ||
222 | # define pthread_in_use() 1 | ||
223 | # endif | ||
224 | |||
225 | static int | ||
226 | setlocale_null_with_lock (int category, char *buf, size_t bufsize) | ||
227 | { | ||
228 | if (pthread_in_use()) | ||
229 | { | ||
230 | pthread_mutex_t *lock = gl_get_setlocale_null_lock (); | ||
231 | int ret; | ||
232 | |||
233 | if (pthread_mutex_lock (lock)) | ||
234 | abort (); | ||
235 | ret = setlocale_null_unlocked (category, buf, bufsize); | ||
236 | if (pthread_mutex_unlock (lock)) | ||
237 | abort (); | ||
238 | |||
239 | return ret; | ||
240 | } | ||
241 | else | ||
242 | return setlocale_null_unlocked (category, buf, bufsize); | ||
243 | } | ||
244 | |||
245 | # elif HAVE_THREADS_H | ||
246 | |||
247 | extern mtx_t *gl_get_setlocale_null_lock (void); | ||
248 | |||
249 | static int | ||
250 | setlocale_null_with_lock (int category, char *buf, size_t bufsize) | ||
251 | { | ||
252 | mtx_t *lock = gl_get_setlocale_null_lock (); | ||
253 | int ret; | ||
254 | |||
255 | if (mtx_lock (lock) != thrd_success) | ||
256 | abort (); | ||
257 | ret = setlocale_null_unlocked (category, buf, bufsize); | ||
258 | if (mtx_unlock (lock) != thrd_success) | ||
259 | abort (); | ||
260 | |||
261 | return ret; | ||
262 | } | ||
263 | |||
264 | # endif | ||
265 | |||
266 | #endif | ||
267 | |||
268 | int | ||
269 | setlocale_null_r (int category, char *buf, size_t bufsize) | ||
270 | { | ||
271 | #if SETLOCALE_NULL_ALL_MTSAFE | ||
272 | # if SETLOCALE_NULL_ONE_MTSAFE | ||
273 | |||
274 | return setlocale_null_unlocked (category, buf, bufsize); | ||
275 | |||
276 | # else | ||
277 | |||
278 | if (category == LC_ALL) | ||
279 | return setlocale_null_unlocked (category, buf, bufsize); | ||
280 | else | ||
281 | return setlocale_null_with_lock (category, buf, bufsize); | ||
282 | |||
283 | # endif | ||
284 | #else | ||
285 | # if SETLOCALE_NULL_ONE_MTSAFE | ||
286 | |||
287 | if (category == LC_ALL) | ||
288 | return setlocale_null_with_lock (category, buf, bufsize); | ||
289 | else | ||
290 | return setlocale_null_unlocked (category, buf, bufsize); | ||
291 | |||
292 | # else | ||
293 | |||
294 | return setlocale_null_with_lock (category, buf, bufsize); | ||
295 | |||
296 | # endif | ||
297 | #endif | ||
298 | } | ||
299 | |||
300 | const char * | ||
301 | setlocale_null (int category) | ||
302 | { | ||
303 | #if SETLOCALE_NULL_ALL_MTSAFE && SETLOCALE_NULL_ONE_MTSAFE | ||
304 | return setlocale_null_androidfix (category); | ||
305 | #else | ||
306 | |||
307 | /* This call must be multithread-safe. To achieve this without using | ||
308 | thread-local storage: | ||
309 | 1. We use a specific static buffer for each possible CATEGORY | ||
310 | argument. So that different threads can call setlocale_mtsafe | ||
311 | with different CATEGORY arguments, without interfering. | ||
312 | 2. We use a simple strcpy or memcpy to fill this static buffer. | ||
313 | Filling it through, for example, strcpy + strcat would not be | ||
314 | guaranteed to leave the buffer's contents intact if another thread | ||
315 | is currently accessing it. If necessary, the contents is first | ||
316 | assembled in a stack-allocated buffer. */ | ||
317 | if (category == LC_ALL) | ||
318 | { | ||
319 | # if SETLOCALE_NULL_ALL_MTSAFE | ||
320 | return setlocale_null_androidfix (LC_ALL); | ||
321 | # else | ||
322 | char buf[SETLOCALE_NULL_ALL_MAX]; | ||
323 | static char resultbuf[SETLOCALE_NULL_ALL_MAX]; | ||
324 | |||
325 | if (setlocale_null_r (LC_ALL, buf, sizeof (buf))) | ||
326 | return "C"; | ||
327 | strcpy (resultbuf, buf); | ||
328 | return resultbuf; | ||
329 | # endif | ||
330 | } | ||
331 | else | ||
332 | { | ||
333 | # if SETLOCALE_NULL_ONE_MTSAFE | ||
334 | return setlocale_null_androidfix (category); | ||
335 | # else | ||
336 | enum | ||
337 | { | ||
338 | LC_CTYPE_INDEX, | ||
339 | LC_NUMERIC_INDEX, | ||
340 | LC_TIME_INDEX, | ||
341 | LC_COLLATE_INDEX, | ||
342 | LC_MONETARY_INDEX, | ||
343 | LC_MESSAGES_INDEX, | ||
344 | # ifdef LC_PAPER | ||
345 | LC_PAPER_INDEX, | ||
346 | # endif | ||
347 | # ifdef LC_NAME | ||
348 | LC_NAME_INDEX, | ||
349 | # endif | ||
350 | # ifdef LC_ADDRESS | ||
351 | LC_ADDRESS_INDEX, | ||
352 | # endif | ||
353 | # ifdef LC_TELEPHONE | ||
354 | LC_TELEPHONE_INDEX, | ||
355 | # endif | ||
356 | # ifdef LC_MEASUREMENT | ||
357 | LC_MEASUREMENT_INDEX, | ||
358 | # endif | ||
359 | # ifdef LC_IDENTIFICATION | ||
360 | LC_IDENTIFICATION_INDEX, | ||
361 | # endif | ||
362 | LC_INDICES_COUNT | ||
363 | } | ||
364 | i; | ||
365 | char buf[SETLOCALE_NULL_MAX]; | ||
366 | static char resultbuf[LC_INDICES_COUNT][SETLOCALE_NULL_MAX]; | ||
367 | int err; | ||
368 | |||
369 | err = setlocale_null_r (category, buf, sizeof (buf)); | ||
370 | if (err == EINVAL) | ||
371 | return NULL; | ||
372 | if (err) | ||
373 | return "C"; | ||
374 | |||
375 | switch (category) | ||
376 | { | ||
377 | case LC_CTYPE: i = LC_CTYPE_INDEX; break; | ||
378 | case LC_NUMERIC: i = LC_NUMERIC_INDEX; break; | ||
379 | case LC_TIME: i = LC_TIME_INDEX; break; | ||
380 | case LC_COLLATE: i = LC_COLLATE_INDEX; break; | ||
381 | case LC_MONETARY: i = LC_MONETARY_INDEX; break; | ||
382 | case LC_MESSAGES: i = LC_MESSAGES_INDEX; break; | ||
383 | # ifdef LC_PAPER | ||
384 | case LC_PAPER: i = LC_PAPER_INDEX; break; | ||
385 | # endif | ||
386 | # ifdef LC_NAME | ||
387 | case LC_NAME: i = LC_NAME_INDEX; break; | ||
388 | # endif | ||
389 | # ifdef LC_ADDRESS | ||
390 | case LC_ADDRESS: i = LC_ADDRESS_INDEX; break; | ||
391 | # endif | ||
392 | # ifdef LC_TELEPHONE | ||
393 | case LC_TELEPHONE: i = LC_TELEPHONE_INDEX; break; | ||
394 | # endif | ||
395 | # ifdef LC_MEASUREMENT | ||
396 | case LC_MEASUREMENT: i = LC_MEASUREMENT_INDEX; break; | ||
397 | # endif | ||
398 | # ifdef LC_IDENTIFICATION | ||
399 | case LC_IDENTIFICATION: i = LC_IDENTIFICATION_INDEX; break; | ||
400 | # endif | ||
401 | default: | ||
402 | /* If you get here, a #ifdef LC_xxx is missing. */ | ||
403 | abort (); | ||
404 | } | ||
405 | |||
406 | strcpy (resultbuf[i], buf); | ||
407 | return resultbuf[i]; | ||
408 | # endif | ||
409 | } | ||
410 | #endif | ||
411 | } | ||