1 /* nl_langinfo() replacement: query locale dependent information.
2
3 Copyright (C) 2007-2018 Free Software Foundation, Inc.
4
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <https://www.gnu.org/licenses/>. */
17
18 #include <config.h>
19
20 /* Specification. */
21 #include <langinfo.h>
22
23 #include <locale.h>
24 #include <string.h>
25 #if defined _WIN32 && ! defined __CYGWIN__
26 # define WIN32_LEAN_AND_MEAN /* avoid including junk */
27 # include <windows.h>
28 # include <stdio.h>
29 #endif
30
31 #if !REPLACE_NL_LANGINFO || GNULIB_defined_CODESET
32 /* Return the codeset of the current locale, if this is easily deducible.
33 Otherwise, return "". */
34 static char *
ctype_codeset(void)35 ctype_codeset (void)
36 {
37 static char buf[2 + 10 + 1];
38 char const *locale = setlocale (LC_CTYPE, NULL);
39 char *codeset = buf;
40 size_t codesetlen;
41 codeset[0] = '\0';
42
43 if (locale && locale[0])
44 {
45 /* If the locale name contains an encoding after the dot, return it. */
46 char *dot = strchr (locale, '.');
47
48 if (dot)
49 {
50 /* Look for the possible @... trailer and remove it, if any. */
51 char *codeset_start = dot + 1;
52 char const *modifier = strchr (codeset_start, '@');
53
54 if (! modifier)
55 codeset = codeset_start;
56 else
57 {
58 codesetlen = modifier - codeset_start;
59 if (codesetlen < sizeof buf)
60 {
61 codeset = memcpy (buf, codeset_start, codesetlen);
62 codeset[codesetlen] = '\0';
63 }
64 }
65 }
66 }
67
68 # if defined _WIN32 && ! defined __CYGWIN__
69 /* If setlocale is successful, it returns the number of the
70 codepage, as a string. Otherwise, fall back on Windows API
71 GetACP, which returns the locale's codepage as a number (although
72 this doesn't change according to what the 'setlocale' call specified).
73 Either way, prepend "CP" to make it a valid codeset name. */
74 codesetlen = strlen (codeset);
75 if (0 < codesetlen && codesetlen < sizeof buf - 2)
76 memmove (buf + 2, codeset, codesetlen + 1);
77 else
78 sprintf (buf + 2, "%u", GetACP ());
79 codeset = memcpy (buf, "CP", 2);
80 # endif
81 return codeset;
82 }
83 #endif
84
85
86 #if REPLACE_NL_LANGINFO
87
88 /* Override nl_langinfo with support for added nl_item values. */
89
90 # undef nl_langinfo
91
92 char *
rpl_nl_langinfo(nl_item item)93 rpl_nl_langinfo (nl_item item)
94 {
95 switch (item)
96 {
97 # if GNULIB_defined_CODESET
98 case CODESET:
99 return ctype_codeset ();
100 # endif
101 # if GNULIB_defined_T_FMT_AMPM
102 case T_FMT_AMPM:
103 return (char *) "%I:%M:%S %p";
104 # endif
105 # if GNULIB_defined_ALTMON
106 case ALTMON_1:
107 case ALTMON_2:
108 case ALTMON_3:
109 case ALTMON_4:
110 case ALTMON_5:
111 case ALTMON_6:
112 case ALTMON_7:
113 case ALTMON_8:
114 case ALTMON_9:
115 case ALTMON_10:
116 case ALTMON_11:
117 case ALTMON_12:
118 /* We don't ship the appropriate localizations with gnulib. Therefore,
119 treat ALTMON_i like MON_i. */
120 item = item - ALTMON_1 + MON_1;
121 break;
122 # endif
123 # if GNULIB_defined_ERA
124 case ERA:
125 /* The format is not standardized. In glibc it is a sequence of strings
126 of the form "direction:offset:start_date:end_date:era_name:era_format"
127 with an empty string at the end. */
128 return (char *) "";
129 case ERA_D_FMT:
130 /* The %Ex conversion in strftime behaves like %x if the locale does not
131 have an alternative time format. */
132 item = D_FMT;
133 break;
134 case ERA_D_T_FMT:
135 /* The %Ec conversion in strftime behaves like %c if the locale does not
136 have an alternative time format. */
137 item = D_T_FMT;
138 break;
139 case ERA_T_FMT:
140 /* The %EX conversion in strftime behaves like %X if the locale does not
141 have an alternative time format. */
142 item = T_FMT;
143 break;
144 case ALT_DIGITS:
145 /* The format is not standardized. In glibc it is a sequence of 10
146 strings, appended in memory. */
147 return (char *) "\0\0\0\0\0\0\0\0\0\0";
148 # endif
149 # if GNULIB_defined_YESEXPR || !FUNC_NL_LANGINFO_YESEXPR_WORKS
150 case YESEXPR:
151 return (char *) "^[yY]";
152 case NOEXPR:
153 return (char *) "^[nN]";
154 # endif
155 default:
156 break;
157 }
158 return nl_langinfo (item);
159 }
160
161 #else
162
163 /* Provide nl_langinfo from scratch, either for native MS-Windows, or
164 for old Unix platforms without locales, such as Linux libc5 or
165 BeOS. */
166
167 # include <time.h>
168
169 char *
nl_langinfo(nl_item item)170 nl_langinfo (nl_item item)
171 {
172 static char nlbuf[100];
173 struct tm tmm = { 0 };
174
175 switch (item)
176 {
177 /* nl_langinfo items of the LC_CTYPE category */
178 case CODESET:
179 {
180 char *codeset = ctype_codeset ();
181 if (*codeset)
182 return codeset;
183 }
184 # ifdef __BEOS__
185 return (char *) "UTF-8";
186 # else
187 return (char *) "ISO-8859-1";
188 # endif
189 /* nl_langinfo items of the LC_NUMERIC category */
190 case RADIXCHAR:
191 return localeconv () ->decimal_point;
192 case THOUSEP:
193 return localeconv () ->thousands_sep;
194 # ifdef GROUPING
195 case GROUPING:
196 return localeconv () ->grouping;
197 # endif
198 /* nl_langinfo items of the LC_TIME category.
199 TODO: Really use the locale. */
200 case D_T_FMT:
201 case ERA_D_T_FMT:
202 return (char *) "%a %b %e %H:%M:%S %Y";
203 case D_FMT:
204 case ERA_D_FMT:
205 return (char *) "%m/%d/%y";
206 case T_FMT:
207 case ERA_T_FMT:
208 return (char *) "%H:%M:%S";
209 case T_FMT_AMPM:
210 return (char *) "%I:%M:%S %p";
211 case AM_STR:
212 if (!strftime (nlbuf, sizeof nlbuf, "%p", &tmm))
213 return (char *) "AM";
214 return nlbuf;
215 case PM_STR:
216 tmm.tm_hour = 12;
217 if (!strftime (nlbuf, sizeof nlbuf, "%p", &tmm))
218 return (char *) "PM";
219 return nlbuf;
220 case DAY_1:
221 case DAY_2:
222 case DAY_3:
223 case DAY_4:
224 case DAY_5:
225 case DAY_6:
226 case DAY_7:
227 {
228 static char const days[][sizeof "Wednesday"] = {
229 "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday",
230 "Friday", "Saturday"
231 };
232 tmm.tm_wday = item - DAY_1;
233 if (!strftime (nlbuf, sizeof nlbuf, "%A", &tmm))
234 return (char *) days[item - DAY_1];
235 return nlbuf;
236 }
237 case ABDAY_1:
238 case ABDAY_2:
239 case ABDAY_3:
240 case ABDAY_4:
241 case ABDAY_5:
242 case ABDAY_6:
243 case ABDAY_7:
244 {
245 static char const abdays[][sizeof "Sun"] = {
246 "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
247 };
248 tmm.tm_wday = item - ABDAY_1;
249 if (!strftime (nlbuf, sizeof nlbuf, "%a", &tmm))
250 return (char *) abdays[item - ABDAY_1];
251 return nlbuf;
252 }
253 {
254 static char const months[][sizeof "September"] = {
255 "January", "February", "March", "April", "May", "June", "July",
256 "September", "October", "November", "December"
257 };
258 case MON_1:
259 case MON_2:
260 case MON_3:
261 case MON_4:
262 case MON_5:
263 case MON_6:
264 case MON_7:
265 case MON_8:
266 case MON_9:
267 case MON_10:
268 case MON_11:
269 case MON_12:
270 tmm.tm_mon = item - MON_1;
271 if (!strftime (nlbuf, sizeof nlbuf, "%B", &tmm))
272 return (char *) months[item - MON_1];
273 return nlbuf;
274 case ALTMON_1:
275 case ALTMON_2:
276 case ALTMON_3:
277 case ALTMON_4:
278 case ALTMON_5:
279 case ALTMON_6:
280 case ALTMON_7:
281 case ALTMON_8:
282 case ALTMON_9:
283 case ALTMON_10:
284 case ALTMON_11:
285 case ALTMON_12:
286 tmm.tm_mon = item - ALTMON_1;
287 /* The platforms without nl_langinfo() don't support strftime with %OB.
288 We don't even need to try. */
289 #if 0
290 if (!strftime (nlbuf, sizeof nlbuf, "%OB", &tmm))
291 #endif
292 if (!strftime (nlbuf, sizeof nlbuf, "%B", &tmm))
293 return (char *) months[item - ALTMON_1];
294 return nlbuf;
295 }
296 case ABMON_1:
297 case ABMON_2:
298 case ABMON_3:
299 case ABMON_4:
300 case ABMON_5:
301 case ABMON_6:
302 case ABMON_7:
303 case ABMON_8:
304 case ABMON_9:
305 case ABMON_10:
306 case ABMON_11:
307 case ABMON_12:
308 {
309 static char const abmonths[][sizeof "Jan"] = {
310 "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul",
311 "Sep", "Oct", "Nov", "Dec"
312 };
313 tmm.tm_mon = item - ABMON_1;
314 if (!strftime (nlbuf, sizeof nlbuf, "%b", &tmm))
315 return (char *) abmonths[item - ABMON_1];
316 return nlbuf;
317 }
318 case ERA:
319 return (char *) "";
320 case ALT_DIGITS:
321 return (char *) "\0\0\0\0\0\0\0\0\0\0";
322 /* nl_langinfo items of the LC_MONETARY category. */
323 case CRNCYSTR:
324 return localeconv () ->currency_symbol;
325 # ifdef INT_CURR_SYMBOL
326 case INT_CURR_SYMBOL:
327 return localeconv () ->int_curr_symbol;
328 case MON_DECIMAL_POINT:
329 return localeconv () ->mon_decimal_point;
330 case MON_THOUSANDS_SEP:
331 return localeconv () ->mon_thousands_sep;
332 case MON_GROUPING:
333 return localeconv () ->mon_grouping;
334 case POSITIVE_SIGN:
335 return localeconv () ->positive_sign;
336 case NEGATIVE_SIGN:
337 return localeconv () ->negative_sign;
338 case FRAC_DIGITS:
339 return & localeconv () ->frac_digits;
340 case INT_FRAC_DIGITS:
341 return & localeconv () ->int_frac_digits;
342 case P_CS_PRECEDES:
343 return & localeconv () ->p_cs_precedes;
344 case N_CS_PRECEDES:
345 return & localeconv () ->n_cs_precedes;
346 case P_SEP_BY_SPACE:
347 return & localeconv () ->p_sep_by_space;
348 case N_SEP_BY_SPACE:
349 return & localeconv () ->n_sep_by_space;
350 case P_SIGN_POSN:
351 return & localeconv () ->p_sign_posn;
352 case N_SIGN_POSN:
353 return & localeconv () ->n_sign_posn;
354 # endif
355 /* nl_langinfo items of the LC_MESSAGES category
356 TODO: Really use the locale. */
357 case YESEXPR:
358 return (char *) "^[yY]";
359 case NOEXPR:
360 return (char *) "^[nN]";
361 default:
362 return (char *) "";
363 }
364 }
365
366 #endif
367