source: coreutils/trunk/lib/nl_langinfo.c@ 1652

Last change on this file since 1652 was 1648, checked in by Silvan Scherrer, 9 years ago

coreutils: update trunk to version 8.25
File size: 8.9 KB
Line 
1/* nl_langinfo() replacement: query locale dependent information.
2
3 Copyright (C) 2007-2016 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 <http://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 __WIN32__) && ! defined __CYGWIN__
26# define WIN32_LEAN_AND_MEAN /* avoid including junk */
27# include <windows.h>
28# include <stdio.h>
29#endif
30
31/* Return the codeset of the current locale, if this is easily deducible.
32 Otherwise, return "". */
33static char *
34ctype_codeset (void)
35{
36 static char buf[2 + 10 + 1];
37 size_t buflen = 0;
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 __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
84
85#if REPLACE_NL_LANGINFO
86
87/* Override nl_langinfo with support for added nl_item values. */
88
89# undef nl_langinfo
90
91char *
92rpl_nl_langinfo (nl_item item)
93{
94 switch (item)
95 {
96# if GNULIB_defined_CODESET
97 case CODESET:
98 return ctype_codeset ();
99# endif
100# if GNULIB_defined_T_FMT_AMPM
101 case T_FMT_AMPM:
102 return "%I:%M:%S %p";
103# endif
104# if GNULIB_defined_ERA
105 case ERA:
106 /* The format is not standardized. In glibc it is a sequence of strings
107 of the form "direction:offset:start_date:end_date:era_name:era_format"
108 with an empty string at the end. */
109 return "";
110 case ERA_D_FMT:
111 /* The %Ex conversion in strftime behaves like %x if the locale does not
112 have an alternative time format. */
113 item = D_FMT;
114 break;
115 case ERA_D_T_FMT:
116 /* The %Ec conversion in strftime behaves like %c if the locale does not
117 have an alternative time format. */
118 item = D_T_FMT;
119 break;
120 case ERA_T_FMT:
121 /* The %EX conversion in strftime behaves like %X if the locale does not
122 have an alternative time format. */
123 item = T_FMT;
124 break;
125 case ALT_DIGITS:
126 /* The format is not standardized. In glibc it is a sequence of 10
127 strings, appended in memory. */
128 return "\0\0\0\0\0\0\0\0\0\0";
129# endif
130# if GNULIB_defined_YESEXPR || !FUNC_NL_LANGINFO_YESEXPR_WORKS
131 case YESEXPR:
132 return "^[yY]";
133 case NOEXPR:
134 return "^[nN]";
135# endif
136 default:
137 break;
138 }
139 return nl_langinfo (item);
140}
141
142#else
143
144/* Provide nl_langinfo from scratch, either for native MS-Windows, or
145 for old Unix platforms without locales, such as Linux libc5 or
146 BeOS. */
147
148# include <time.h>
149
150char *
151nl_langinfo (nl_item item)
152{
153 static char nlbuf[100];
154 struct tm tmm = { 0 };
155
156 switch (item)
157 {
158 /* nl_langinfo items of the LC_CTYPE category */
159 case CODESET:
160 {
161 char *codeset = ctype_codeset ();
162 if (*codeset)
163 return codeset;
164 }
165# ifdef __BEOS__
166 return "UTF-8";
167# else
168 return "ISO-8859-1";
169# endif
170 /* nl_langinfo items of the LC_NUMERIC category */
171 case RADIXCHAR:
172 return localeconv () ->decimal_point;
173 case THOUSEP:
174 return localeconv () ->thousands_sep;
175 case GROUPING:
176 return localeconv () ->grouping;
177 /* nl_langinfo items of the LC_TIME category.
178 TODO: Really use the locale. */
179 case D_T_FMT:
180 case ERA_D_T_FMT:
181 return "%a %b %e %H:%M:%S %Y";
182 case D_FMT:
183 case ERA_D_FMT:
184 return "%m/%d/%y";
185 case T_FMT:
186 case ERA_T_FMT:
187 return "%H:%M:%S";
188 case T_FMT_AMPM:
189 return "%I:%M:%S %p";
190 case AM_STR:
191 if (!strftime (nlbuf, sizeof nlbuf, "%p", &tmm))
192 return "AM";
193 return nlbuf;
194 case PM_STR:
195 tmm.tm_hour = 12;
196 if (!strftime (nlbuf, sizeof nlbuf, "%p", &tmm))
197 return "PM";
198 return nlbuf;
199 case DAY_1:
200 case DAY_2:
201 case DAY_3:
202 case DAY_4:
203 case DAY_5:
204 case DAY_6:
205 case DAY_7:
206 {
207 static char const days[][sizeof "Wednesday"] = {
208 "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday",
209 "Friday", "Saturday"
210 };
211 tmm.tm_wday = item - DAY_1;
212 if (!strftime (nlbuf, sizeof nlbuf, "%A", &tmm))
213 return (char *) days[item - DAY_1];
214 return nlbuf;
215 }
216 case ABDAY_1:
217 case ABDAY_2:
218 case ABDAY_3:
219 case ABDAY_4:
220 case ABDAY_5:
221 case ABDAY_6:
222 case ABDAY_7:
223 {
224 static char const abdays[][sizeof "Sun"] = {
225 "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
226 };
227 tmm.tm_wday = item - ABDAY_1;
228 if (!strftime (nlbuf, sizeof nlbuf, "%a", &tmm))
229 return (char *) abdays[item - ABDAY_1];
230 return nlbuf;
231 }
232 case MON_1:
233 case MON_2:
234 case MON_3:
235 case MON_4:
236 case MON_5:
237 case MON_6:
238 case MON_7:
239 case MON_8:
240 case MON_9:
241 case MON_10:
242 case MON_11:
243 case MON_12:
244 {
245 static char const months[][sizeof "September"] = {
246 "January", "February", "March", "April", "May", "June", "July",
247 "September", "October", "November", "December"
248 };
249 tmm.tm_mon = item - MON_1;
250 if (!strftime (nlbuf, sizeof nlbuf, "%B", &tmm))
251 return (char *) months[item - MON_1];
252 return nlbuf;
253 }
254 case ABMON_1:
255 case ABMON_2:
256 case ABMON_3:
257 case ABMON_4:
258 case ABMON_5:
259 case ABMON_6:
260 case ABMON_7:
261 case ABMON_8:
262 case ABMON_9:
263 case ABMON_10:
264 case ABMON_11:
265 case ABMON_12:
266 {
267 static char const abmonths[][sizeof "Jan"] = {
268 "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul",
269 "Sep", "Oct", "Nov", "Dec"
270 };
271 tmm.tm_mon = item - ABMON_1;
272 if (!strftime (nlbuf, sizeof nlbuf, "%b", &tmm))
273 return (char *) abmonths[item - ABMON_1];
274 return nlbuf;
275 }
276 case ERA:
277 return "";
278 case ALT_DIGITS:
279 return "\0\0\0\0\0\0\0\0\0\0";
280 /* nl_langinfo items of the LC_MONETARY category. */
281 case CRNCYSTR:
282 return localeconv () ->currency_symbol;
283 case INT_CURR_SYMBOL:
284 return localeconv () ->int_curr_symbol;
285 case MON_DECIMAL_POINT:
286 return localeconv () ->mon_decimal_point;
287 case MON_THOUSANDS_SEP:
288 return localeconv () ->mon_thousands_sep;
289 case MON_GROUPING:
290 return localeconv () ->mon_grouping;
291 case POSITIVE_SIGN:
292 return localeconv () ->positive_sign;
293 case NEGATIVE_SIGN:
294 return localeconv () ->negative_sign;
295 case FRAC_DIGITS:
296 return & localeconv () ->frac_digits;
297 case INT_FRAC_DIGITS:
298 return & localeconv () ->int_frac_digits;
299 case P_CS_PRECEDES:
300 return & localeconv () ->p_cs_precedes;
301 case N_CS_PRECEDES:
302 return & localeconv () ->n_cs_precedes;
303 case P_SEP_BY_SPACE:
304 return & localeconv () ->p_sep_by_space;
305 case N_SEP_BY_SPACE:
306 return & localeconv () ->n_sep_by_space;
307 case P_SIGN_POSN:
308 return & localeconv () ->p_sign_posn;
309 case N_SIGN_POSN:
310 return & localeconv () ->n_sign_posn;
311 /* nl_langinfo items of the LC_MESSAGES category
312 TODO: Really use the locale. */
313 case YESEXPR:
314 return "^[yY]";
315 case NOEXPR:
316 return "^[nN]";
317 default:
318 return "";
319 }
320}
321
322#endif
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