Commit | Line | Data |
---|---|---|
49fb5799 PE |
1 | /* Copyright (C) 1991, 92, 93, 94, 95, 96, 97 Free Software Foundation, Inc. |
2 | ||
3 | NOTE: The canonical source of this file is maintained with the GNU C Library. | |
4 | Bugs can be reported to bug-glibc@prep.ai.mit.edu. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU General Public License as published by the | |
8 | Free Software Foundation; either version 2, or (at your option) any | |
9 | later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
19 | USA. */ | |
20 | ||
21 | #ifdef HAVE_CONFIG_H | |
22 | # include <config.h> | |
23 | #endif | |
24 | ||
25 | #ifdef _LIBC | |
26 | # define HAVE_LIMITS_H 1 | |
27 | # define HAVE_MBLEN 1 | |
28 | # define HAVE_MBRLEN 1 | |
29 | # define HAVE_STRUCT_ERA_ENTRY 1 | |
30 | # define HAVE_TM_GMTOFF 1 | |
31 | # define HAVE_TM_ZONE 1 | |
32 | # define HAVE_TZNAME 1 | |
33 | # define HAVE_TZSET 1 | |
34 | # define MULTIBYTE_IS_FORMAT_SAFE 1 | |
35 | # define STDC_HEADERS 1 | |
36 | # include <ansidecl.h> | |
37 | # include "../locale/localeinfo.h" | |
38 | #endif | |
39 | ||
40 | #include <ctype.h> | |
41 | #include <sys/types.h> /* Some systems define `time_t' here. */ | |
42 | ||
43 | #ifdef TIME_WITH_SYS_TIME | |
44 | # include <sys/time.h> | |
45 | # include <time.h> | |
46 | #else | |
47 | # ifdef HAVE_SYS_TIME_H | |
48 | # include <sys/time.h> | |
49 | # else | |
50 | # include <time.h> | |
51 | # endif | |
52 | #endif | |
53 | #if HAVE_TZNAME | |
54 | extern char *tzname[]; | |
55 | #endif | |
56 | ||
57 | /* Do multibyte processing if multibytes are supported, unless | |
58 | multibyte sequences are safe in formats. Multibyte sequences are | |
59 | safe if they cannot contain byte sequences that look like format | |
60 | conversion specifications. The GNU C Library uses UTF8 multibyte | |
61 | encoding, which is safe for formats, but strftime.c can be used | |
62 | with other C libraries that use unsafe encodings. */ | |
63 | #define DO_MULTIBYTE (HAVE_MBLEN && ! MULTIBYTE_IS_FORMAT_SAFE) | |
64 | ||
65 | #if DO_MULTIBYTE | |
66 | # if HAVE_MBRLEN | |
67 | # include <wchar.h> | |
68 | # else | |
69 | /* Simulate mbrlen with mblen as best we can. */ | |
70 | # define mbstate_t int | |
71 | # define mbrlen(s, n, ps) mblen (s, n) | |
72 | # define mbsinit(ps) (*(ps) == 0) | |
73 | # endif | |
74 | static const mbstate_t mbstate_zero; | |
75 | #endif | |
76 | ||
77 | #if HAVE_LIMITS_H | |
78 | # include <limits.h> | |
79 | #endif | |
80 | ||
81 | #if STDC_HEADERS | |
82 | # include <stddef.h> | |
83 | # include <stdlib.h> | |
84 | # include <string.h> | |
85 | #else | |
86 | # define memcpy(d, s, n) bcopy ((s), (d), (n)) | |
87 | #endif | |
88 | ||
89 | #ifndef __P | |
90 | # if defined (__GNUC__) || (defined (__STDC__) && __STDC__) | |
91 | # define __P(args) args | |
92 | # else | |
93 | # define __P(args) () | |
94 | # endif /* GCC. */ | |
95 | #endif /* Not __P. */ | |
96 | ||
97 | #ifndef PTR | |
98 | # ifdef __STDC__ | |
99 | # define PTR void * | |
100 | # else | |
101 | # define PTR char * | |
102 | # endif | |
103 | #endif | |
104 | ||
105 | #ifndef CHAR_BIT | |
106 | # define CHAR_BIT 8 | |
107 | #endif | |
108 | ||
109 | #ifndef NULL | |
110 | # define NULL 0 | |
111 | #endif | |
112 | ||
113 | #define TYPE_SIGNED(t) ((t) -1 < 0) | |
114 | ||
115 | /* Bound on length of the string representing an integer value of type t. | |
116 | Subtract one for the sign bit if t is signed; | |
117 | 302 / 1000 is log10 (2) rounded up; | |
118 | add one for integer division truncation; | |
119 | add one more for a minus sign if t is signed. */ | |
120 | #define INT_STRLEN_BOUND(t) \ | |
121 | ((sizeof (t) * CHAR_BIT - TYPE_SIGNED (t)) * 302 / 100 + 1 + TYPE_SIGNED (t)) | |
122 | ||
123 | #define TM_YEAR_BASE 1900 | |
124 | ||
125 | #ifndef __isleap | |
126 | /* Nonzero if YEAR is a leap year (every 4 years, | |
127 | except every 100th isn't, and every 400th is). */ | |
128 | # define __isleap(year) \ | |
129 | ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0)) | |
130 | #endif | |
131 | ||
132 | ||
133 | #ifdef _LIBC | |
134 | # define gmtime_r __gmtime_r | |
135 | # define localtime_r __localtime_r | |
136 | extern int __tz_compute __P ((time_t timer, const struct tm *tm)); | |
137 | # define tzname __tzname | |
138 | # define tzset __tzset | |
139 | #else | |
140 | # if ! HAVE_LOCALTIME_R | |
141 | # if ! HAVE_TM_GMTOFF | |
142 | /* Approximate gmtime_r as best we can in its absence. */ | |
143 | # define gmtime_r my_gmtime_r | |
144 | static struct tm *gmtime_r __P ((const time_t *, struct tm *)); | |
145 | static struct tm * | |
146 | gmtime_r (t, tp) | |
147 | const time_t *t; | |
148 | struct tm *tp; | |
149 | { | |
150 | struct tm *l = gmtime (t); | |
151 | if (! l) | |
152 | return 0; | |
153 | *tp = *l; | |
154 | return tp; | |
155 | } | |
156 | # endif /* ! HAVE_TM_GMTOFF */ | |
157 | ||
158 | /* Approximate localtime_r as best we can in its absence. */ | |
159 | # define localtime_r my_localtime_r | |
160 | static struct tm *localtime_r __P ((const time_t *, struct tm *)); | |
161 | static struct tm * | |
162 | localtime_r (t, tp) | |
163 | const time_t *t; | |
164 | struct tm *tp; | |
165 | { | |
166 | struct tm *l = localtime (t); | |
167 | if (! l) | |
168 | return 0; | |
169 | *tp = *l; | |
170 | return tp; | |
171 | } | |
172 | # endif /* ! HAVE_LOCALTIME_R */ | |
173 | #endif /* ! defined (_LIBC) */ | |
174 | ||
175 | ||
176 | #if !defined (memset) && !defined (HAVE_MEMSET) && !defined (_LIBC) | |
177 | /* Some systems lack the `memset' function and we don't want to | |
178 | introduce additional dependencies. */ | |
179 | static const char spaces[16] = " "; | |
180 | ||
181 | # define memset_space(P, Len) \ | |
182 | do { \ | |
183 | int _len = (Len); \ | |
184 | \ | |
185 | do \ | |
186 | { \ | |
187 | int _this = _len > 16 ? 16 : _len; \ | |
188 | memcpy ((P), spaces, _this); \ | |
189 | (P) += _this; \ | |
190 | _len -= _this; \ | |
191 | } \ | |
192 | while (_len > 0); \ | |
193 | } while (0) | |
194 | #else | |
195 | # define memset_space(P, Len) (memset ((P), ' ', (Len)), (P) += (Len)) | |
196 | #endif | |
197 | ||
198 | #define add(n, f) \ | |
199 | do \ | |
200 | { \ | |
201 | int _n = (n); \ | |
202 | int _delta = width - _n; \ | |
203 | int _incr = _n + (_delta > 0 ? _delta : 0); \ | |
204 | if (i + _incr >= maxsize) \ | |
205 | return 0; \ | |
206 | if (p) \ | |
207 | { \ | |
208 | if (_delta > 0) \ | |
209 | memset_space (p, _delta); \ | |
210 | f; \ | |
211 | p += _n; \ | |
212 | } \ | |
213 | i += _incr; \ | |
214 | } while (0) | |
215 | ||
216 | #define cpy(n, s) \ | |
217 | add ((n), \ | |
218 | if (to_lowcase) \ | |
219 | memcpy_lowcase (p, (s), _n); \ | |
220 | else if (to_uppcase) \ | |
221 | memcpy_uppcase (p, (s), _n); \ | |
222 | else \ | |
223 | memcpy ((PTR) p, (PTR) (s), _n)) | |
224 | ||
225 | ||
226 | ||
227 | #ifdef _LIBC | |
228 | # define TOUPPER(Ch) toupper (Ch) | |
229 | # define TOLOWER(Ch) tolower (Ch) | |
230 | #else | |
231 | # define TOUPPER(Ch) (islower (Ch) ? toupper (Ch) : (Ch)) | |
232 | # define TOLOWER(Ch) (isupper (Ch) ? tolower (Ch) : (Ch)) | |
233 | #endif | |
234 | /* We don't use `isdigit' here since the locale dependent | |
235 | interpretation is not what we want here. We only need to accept | |
236 | the arabic digits in the ASCII range. One day there is perhaps a | |
237 | more reliable way to accept other sets of digits. */ | |
238 | #define ISDIGIT(Ch) ((unsigned int) (Ch) - '0' <= 9) | |
239 | ||
240 | static char *memcpy_lowcase __P ((char *dest, const char *src, size_t len)); | |
241 | ||
242 | static char * | |
243 | memcpy_lowcase (dest, src, len) | |
244 | char *dest; | |
245 | const char *src; | |
246 | size_t len; | |
247 | { | |
248 | while (len-- > 0) | |
249 | dest[len] = TOLOWER (src[len]); | |
250 | return dest; | |
251 | } | |
252 | ||
253 | static char *memcpy_uppcase __P ((char *dest, const char *src, size_t len)); | |
254 | ||
255 | static char * | |
256 | memcpy_uppcase (dest, src, len) | |
257 | char *dest; | |
258 | const char *src; | |
259 | size_t len; | |
260 | { | |
261 | while (len-- > 0) | |
262 | dest[len] = TOUPPER (src[len]); | |
263 | return dest; | |
264 | } | |
265 | ||
266 | #if ! HAVE_TM_GMTOFF | |
267 | /* Yield the difference between *A and *B, | |
268 | measured in seconds, ignoring leap seconds. */ | |
269 | static int tm_diff __P ((const struct tm *, const struct tm *)); | |
270 | static int | |
271 | tm_diff (a, b) | |
272 | const struct tm *a; | |
273 | const struct tm *b; | |
274 | { | |
275 | /* Compute intervening leap days correctly even if year is negative. | |
276 | Take care to avoid int overflow in leap day calculations, | |
277 | but it's OK to assume that A and B are close to each other. */ | |
278 | int a4 = (a->tm_year >> 2) + (TM_YEAR_BASE >> 2) - ! (a->tm_year & 3); | |
279 | int b4 = (b->tm_year >> 2) + (TM_YEAR_BASE >> 2) - ! (b->tm_year & 3); | |
280 | int a100 = a4 / 25 - (a4 % 25 < 0); | |
281 | int b100 = b4 / 25 - (b4 % 25 < 0); | |
282 | int a400 = a100 >> 2; | |
283 | int b400 = b100 >> 2; | |
284 | int intervening_leap_days = (a4 - b4) - (a100 - b100) + (a400 - b400); | |
285 | int years = a->tm_year - b->tm_year; | |
286 | int days = (365 * years + intervening_leap_days | |
287 | + (a->tm_yday - b->tm_yday)); | |
288 | return (60 * (60 * (24 * days + (a->tm_hour - b->tm_hour)) | |
289 | + (a->tm_min - b->tm_min)) | |
290 | + (a->tm_sec - b->tm_sec)); | |
291 | } | |
292 | #endif /* ! HAVE_TM_GMTOFF */ | |
293 | ||
294 | ||
295 | ||
296 | /* The number of days from the first day of the first ISO week of this | |
297 | year to the year day YDAY with week day WDAY. ISO weeks start on | |
298 | Monday; the first ISO week has the year's first Thursday. YDAY may | |
299 | be as small as YDAY_MINIMUM. */ | |
300 | #define ISO_WEEK_START_WDAY 1 /* Monday */ | |
301 | #define ISO_WEEK1_WDAY 4 /* Thursday */ | |
302 | #define YDAY_MINIMUM (-366) | |
303 | static int iso_week_days __P ((int, int)); | |
304 | #ifdef __GNUC__ | |
305 | inline | |
306 | #endif | |
307 | static int | |
308 | iso_week_days (yday, wday) | |
309 | int yday; | |
310 | int wday; | |
311 | { | |
312 | /* Add enough to the first operand of % to make it nonnegative. */ | |
313 | int big_enough_multiple_of_7 = (-YDAY_MINIMUM / 7 + 2) * 7; | |
314 | return (yday | |
315 | - (yday - wday + ISO_WEEK1_WDAY + big_enough_multiple_of_7) % 7 | |
316 | + ISO_WEEK1_WDAY - ISO_WEEK_START_WDAY); | |
317 | } | |
318 | ||
319 | ||
320 | #ifndef _NL_CURRENT | |
321 | static char const weekday_name[][10] = | |
322 | { | |
323 | "Sunday", "Monday", "Tuesday", "Wednesday", | |
324 | "Thursday", "Friday", "Saturday" | |
325 | }; | |
326 | static char const month_name[][10] = | |
327 | { | |
328 | "January", "February", "March", "April", "May", "June", | |
329 | "July", "August", "September", "October", "November", "December" | |
330 | }; | |
331 | #endif | |
332 | ||
333 | ||
334 | #if !defined _LIBC && HAVE_TZNAME && HAVE_TZSET | |
335 | /* Solaris 2.5 tzset sometimes modifies the storage returned by localtime. | |
336 | Work around this bug by copying *tp before it might be munged. */ | |
337 | size_t _strftime_copytm __P ((char *, size_t, const char *, | |
338 | const struct tm *)); | |
339 | size_t | |
340 | strftime (s, maxsize, format, tp) | |
341 | char *s; | |
342 | size_t maxsize; | |
343 | const char *format; | |
344 | const struct tm *tp; | |
345 | { | |
346 | struct tm tmcopy; | |
347 | tmcopy = *tp; | |
348 | return _strftime_copytm (s, maxsize, format, &tmcopy); | |
349 | } | |
350 | # ifdef strftime | |
351 | # undef strftime | |
352 | # endif | |
353 | # define strftime(S, Maxsize, Format, Tp) \ | |
354 | _strftime_copytm (S, Maxsize, Format, Tp) | |
355 | #endif | |
356 | ||
357 | ||
358 | /* Write information from TP into S according to the format | |
359 | string FORMAT, writing no more that MAXSIZE characters | |
360 | (including the terminating '\0') and returning number of | |
361 | characters written. If S is NULL, nothing will be written | |
362 | anywhere, so to determine how many characters would be | |
363 | written, use NULL for S and (size_t) UINT_MAX for MAXSIZE. */ | |
364 | size_t | |
365 | strftime (s, maxsize, format, tp) | |
366 | char *s; | |
367 | size_t maxsize; | |
368 | const char *format; | |
369 | const struct tm *tp; | |
370 | { | |
371 | int hour12 = tp->tm_hour; | |
372 | #ifdef _NL_CURRENT | |
373 | const char *const a_wkday = _NL_CURRENT (LC_TIME, ABDAY_1 + tp->tm_wday); | |
374 | const char *const f_wkday = _NL_CURRENT (LC_TIME, DAY_1 + tp->tm_wday); | |
375 | const char *const a_month = _NL_CURRENT (LC_TIME, ABMON_1 + tp->tm_mon); | |
376 | const char *const f_month = _NL_CURRENT (LC_TIME, MON_1 + tp->tm_mon); | |
377 | const char *const ampm = _NL_CURRENT (LC_TIME, | |
378 | hour12 > 11 ? PM_STR : AM_STR); | |
379 | size_t aw_len = strlen (a_wkday); | |
380 | size_t am_len = strlen (a_month); | |
381 | size_t ap_len = strlen (ampm); | |
382 | #else | |
383 | const char *const f_wkday = weekday_name[tp->tm_wday]; | |
384 | const char *const f_month = month_name[tp->tm_mon]; | |
385 | const char *const a_wkday = f_wkday; | |
386 | const char *const a_month = f_month; | |
387 | const char *const ampm = "AMPM" + 2 * (hour12 > 11); | |
388 | size_t aw_len = 3; | |
389 | size_t am_len = 3; | |
390 | size_t ap_len = 2; | |
391 | #endif | |
392 | size_t wkday_len = strlen (f_wkday); | |
393 | size_t month_len = strlen (f_month); | |
394 | const char *zone; | |
395 | size_t zonelen; | |
396 | size_t i = 0; | |
397 | char *p = s; | |
398 | const char *f; | |
399 | ||
400 | zone = NULL; | |
401 | #if !defined _LIBC && HAVE_TM_ZONE | |
402 | /* XXX We have some problems here. First, the string pointed to by | |
403 | tm_zone is dynamically allocated while loading the zone data. But | |
404 | when another zone is loaded since the information in TP were | |
405 | computed this would be a stale pointer. | |
406 | The second problem is the POSIX test suite which assumes setting | |
407 | the environment variable TZ to a new value before calling strftime() | |
408 | will influence the result (the %Z format) even if the information in | |
409 | TP is computed with a totally different time zone. --drepper@gnu */ | |
410 | zone = (const char *) tp->tm_zone; | |
411 | #endif | |
412 | #if HAVE_TZNAME | |
413 | /* POSIX.1 8.1.1 requires that whenever strftime() is called, the | |
414 | time zone names contained in the external variable `tzname' shall | |
415 | be set as if the tzset() function had been called. */ | |
416 | # if HAVE_TZSET | |
417 | tzset (); | |
418 | # endif | |
419 | ||
420 | if (!(zone && *zone) && tp->tm_isdst >= 0) | |
421 | zone = tzname[tp->tm_isdst]; | |
422 | #endif | |
423 | if (! zone) | |
424 | zone = ""; /* POSIX.2 requires the empty string here. */ | |
425 | ||
426 | zonelen = strlen (zone); | |
427 | ||
428 | if (hour12 > 12) | |
429 | hour12 -= 12; | |
430 | else | |
431 | if (hour12 == 0) hour12 = 12; | |
432 | ||
433 | for (f = format; *f != '\0'; ++f) | |
434 | { | |
435 | int pad; /* Padding for number ('-', '_', or 0). */ | |
436 | int modifier; /* Field modifier ('E', 'O', or 0). */ | |
437 | int digits; /* Max digits for numeric format. */ | |
438 | int number_value; /* Numeric value to be printed. */ | |
439 | int negative_number; /* 1 if the number is negative. */ | |
440 | const char *subfmt; | |
441 | char *bufp; | |
442 | char buf[1 + (sizeof (int) < sizeof (time_t) | |
443 | ? INT_STRLEN_BOUND (time_t) | |
444 | : INT_STRLEN_BOUND (int))]; | |
445 | int width = -1; | |
446 | int to_lowcase = 0; | |
447 | int to_uppcase = 0; | |
448 | ||
449 | #if DO_MULTIBYTE | |
450 | ||
451 | switch (*f) | |
452 | { | |
453 | case '%': | |
454 | break; | |
455 | ||
456 | case '\a': case '\b': case '\t': case '\n': | |
457 | case '\v': case '\f': case '\r': | |
458 | case ' ': case '!': case '"': case '#': case '&': case'\'': | |
459 | case '(': case ')': case '*': case '+': case ',': case '-': | |
460 | case '.': case '/': case '0': case '1': case '2': case '3': | |
461 | case '4': case '5': case '6': case '7': case '8': case '9': | |
462 | case ':': case ';': case '<': case '=': case '>': case '?': | |
463 | case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': | |
464 | case 'G': case 'H': case 'I': case 'J': case 'K': case 'L': | |
465 | case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R': | |
466 | case 'S': case 'T': case 'U': case 'V': case 'W': case 'X': | |
467 | case 'Y': case 'Z': case '[': case'\\': case ']': case '^': | |
468 | case '_': case 'a': case 'b': case 'c': case 'd': case 'e': | |
469 | case 'f': case 'g': case 'h': case 'i': case 'j': case 'k': | |
470 | case 'l': case 'm': case 'n': case 'o': case 'p': case 'q': | |
471 | case 'r': case 's': case 't': case 'u': case 'v': case 'w': | |
472 | case 'x': case 'y': case 'z': case '{': case '|': case '}': | |
473 | case '~': | |
474 | /* The C Standard requires these 98 characters (plus '%') to | |
475 | be in the basic execution character set. None of these | |
476 | characters can start a multibyte sequence, so they need | |
477 | not be analyzed further. */ | |
478 | add (1, *p = *f); | |
479 | continue; | |
480 | ||
481 | default: | |
482 | /* Copy this multibyte sequence until we reach its end, find | |
483 | an error, or come back to the initial shift state. */ | |
484 | { | |
485 | mbstate_t mbstate = mbstate_zero; | |
486 | size_t len = 0; | |
487 | ||
488 | do | |
489 | { | |
490 | size_t bytes = mbrlen (f + len, (size_t) -1, &mbstate); | |
491 | ||
492 | if (bytes == 0) | |
493 | break; | |
494 | ||
495 | if (bytes == (size_t) -2 || bytes == (size_t) -1) | |
496 | { | |
497 | len++; | |
498 | break; | |
499 | } | |
500 | ||
501 | len += bytes; | |
502 | } | |
503 | while (! mbsinit (&mbstate)); | |
504 | ||
505 | cpy (len, f); | |
506 | continue; | |
507 | } | |
508 | } | |
509 | ||
510 | #else /* ! DO_MULTIBYTE */ | |
511 | ||
512 | /* Either multibyte encodings are not supported, or they are | |
513 | safe for formats, so any non-'%' byte can be copied through. */ | |
514 | if (*f != '%') | |
515 | { | |
516 | add (1, *p = *f); | |
517 | continue; | |
518 | } | |
519 | ||
520 | #endif /* ! DO_MULTIBYTE */ | |
521 | ||
522 | /* Check for flags that can modify a format. */ | |
523 | pad = 0; | |
524 | while (1) | |
525 | { | |
526 | switch (*++f) | |
527 | { | |
528 | /* This influences the number formats. */ | |
529 | case '_': | |
530 | case '-': | |
531 | case '0': | |
532 | pad = *f; | |
533 | continue; | |
534 | ||
535 | /* This changes textual output. */ | |
536 | case '^': | |
537 | to_uppcase = 1; | |
538 | continue; | |
539 | ||
540 | default: | |
541 | break; | |
542 | } | |
543 | break; | |
544 | } | |
545 | ||
546 | /* As a GNU extension we allow to specify the field width. */ | |
547 | if (ISDIGIT (*f)) | |
548 | { | |
549 | width = 0; | |
550 | do | |
551 | { | |
552 | width *= 10; | |
553 | width += *f - '0'; | |
554 | ++f; | |
555 | } | |
556 | while (ISDIGIT (*f)); | |
557 | } | |
558 | ||
559 | /* Check for modifiers. */ | |
560 | switch (*f) | |
561 | { | |
562 | case 'E': | |
563 | case 'O': | |
564 | modifier = *f++; | |
565 | break; | |
566 | ||
567 | default: | |
568 | modifier = 0; | |
569 | break; | |
570 | } | |
571 | ||
572 | /* Now do the specified format. */ | |
573 | switch (*f) | |
574 | { | |
575 | #define DO_NUMBER(d, v) \ | |
576 | digits = d; number_value = v; goto do_number | |
577 | #define DO_NUMBER_SPACEPAD(d, v) \ | |
578 | digits = d; number_value = v; goto do_number_spacepad | |
579 | ||
580 | case '%': | |
581 | if (modifier != 0) | |
582 | goto bad_format; | |
583 | add (1, *p = *f); | |
584 | break; | |
585 | ||
586 | case 'a': | |
587 | if (modifier != 0) | |
588 | goto bad_format; | |
589 | cpy (aw_len, a_wkday); | |
590 | break; | |
591 | ||
592 | case 'A': | |
593 | if (modifier != 0) | |
594 | goto bad_format; | |
595 | cpy (wkday_len, f_wkday); | |
596 | break; | |
597 | ||
598 | case 'b': | |
599 | case 'h': /* POSIX.2 extension. */ | |
600 | if (modifier != 0) | |
601 | goto bad_format; | |
602 | cpy (am_len, a_month); | |
603 | break; | |
604 | ||
605 | case 'B': | |
606 | if (modifier != 0) | |
607 | goto bad_format; | |
608 | cpy (month_len, f_month); | |
609 | break; | |
610 | ||
611 | case 'c': | |
612 | if (modifier == 'O') | |
613 | goto bad_format; | |
614 | #ifdef _NL_CURRENT | |
615 | if (! (modifier == 'E' | |
616 | && *(subfmt = _NL_CURRENT (LC_TIME, ERA_D_T_FMT)) != '\0')) | |
617 | subfmt = _NL_CURRENT (LC_TIME, D_T_FMT); | |
618 | #else | |
619 | subfmt = "%a %b %e %H:%M:%S %Y"; | |
620 | #endif | |
621 | ||
622 | subformat: | |
623 | { | |
624 | char *old_start = p; | |
625 | size_t len = strftime (NULL, maxsize - i, subfmt, tp); | |
626 | if (len == 0 && *subfmt) | |
627 | return 0; | |
628 | add (len, strftime (p, maxsize - i, subfmt, tp)); | |
629 | ||
630 | if (to_uppcase) | |
631 | while (old_start < p) | |
632 | { | |
633 | *old_start = TOUPPER (*old_start); | |
634 | ++old_start; | |
635 | } | |
636 | } | |
637 | break; | |
638 | ||
639 | case 'C': /* POSIX.2 extension. */ | |
640 | if (modifier == 'O') | |
641 | goto bad_format; | |
642 | #if HAVE_STRUCT_ERA_ENTRY | |
643 | if (modifier == 'E') | |
644 | { | |
645 | struct era_entry *era = _nl_get_era_entry (tp); | |
646 | if (era) | |
647 | { | |
648 | size_t len = strlen (era->name_fmt); | |
649 | cpy (len, era->name_fmt); | |
650 | break; | |
651 | } | |
652 | } | |
653 | #endif | |
654 | { | |
655 | int year = tp->tm_year + TM_YEAR_BASE; | |
656 | DO_NUMBER (1, year / 100 - (year % 100 < 0)); | |
657 | } | |
658 | ||
659 | case 'x': | |
660 | if (modifier == 'O') | |
661 | goto bad_format; | |
662 | #ifdef _NL_CURRENT | |
663 | if (! (modifier == 'E' | |
664 | && *(subfmt = _NL_CURRENT (LC_TIME, ERA_D_FMT)) != '\0')) | |
665 | subfmt = _NL_CURRENT (LC_TIME, D_FMT); | |
666 | goto subformat; | |
667 | #endif | |
668 | /* Fall through. */ | |
669 | case 'D': /* POSIX.2 extension. */ | |
670 | if (modifier != 0) | |
671 | goto bad_format; | |
672 | subfmt = "%m/%d/%y"; | |
673 | goto subformat; | |
674 | ||
675 | case 'd': | |
676 | if (modifier == 'E') | |
677 | goto bad_format; | |
678 | ||
679 | DO_NUMBER (2, tp->tm_mday); | |
680 | ||
681 | case 'e': /* POSIX.2 extension. */ | |
682 | if (modifier == 'E') | |
683 | goto bad_format; | |
684 | ||
685 | DO_NUMBER_SPACEPAD (2, tp->tm_mday); | |
686 | ||
687 | /* All numeric formats set DIGITS and NUMBER_VALUE and then | |
688 | jump to one of these two labels. */ | |
689 | ||
690 | do_number_spacepad: | |
691 | /* Force `_' flag unless overwritten by `0' flag. */ | |
692 | if (pad != '0') | |
693 | pad = '_'; | |
694 | ||
695 | do_number: | |
696 | /* Format the number according to the MODIFIER flag. */ | |
697 | ||
698 | #ifdef _NL_CURRENT | |
699 | if (modifier == 'O' && 0 <= number_value) | |
700 | { | |
701 | /* Get the locale specific alternate representation of | |
702 | the number NUMBER_VALUE. If none exist NULL is returned. */ | |
703 | const char *cp = _nl_get_alt_digit (number_value); | |
704 | ||
705 | if (cp != NULL) | |
706 | { | |
707 | size_t digitlen = strlen (cp); | |
708 | if (digitlen != 0) | |
709 | { | |
710 | cpy (digitlen, cp); | |
711 | break; | |
712 | } | |
713 | } | |
714 | } | |
715 | #endif | |
716 | { | |
717 | unsigned int u = number_value; | |
718 | ||
719 | bufp = buf + sizeof (buf); | |
720 | negative_number = number_value < 0; | |
721 | ||
722 | if (negative_number) | |
723 | u = -u; | |
724 | ||
725 | do | |
726 | *--bufp = u % 10 + '0'; | |
727 | while ((u /= 10) != 0); | |
728 | } | |
729 | ||
730 | do_number_sign_and_padding: | |
731 | if (negative_number) | |
732 | *--bufp = '-'; | |
733 | ||
734 | if (pad != '-') | |
735 | { | |
736 | int padding = digits - (buf + sizeof (buf) - bufp); | |
737 | ||
738 | if (pad == '_') | |
739 | { | |
740 | while (0 < padding--) | |
741 | *--bufp = ' '; | |
742 | } | |
743 | else | |
744 | { | |
745 | bufp += negative_number; | |
746 | while (0 < padding--) | |
747 | *--bufp = '0'; | |
748 | if (negative_number) | |
749 | *--bufp = '-'; | |
750 | } | |
751 | } | |
752 | ||
753 | cpy (buf + sizeof (buf) - bufp, bufp); | |
754 | break; | |
755 | ||
756 | ||
757 | case 'H': | |
758 | if (modifier == 'E') | |
759 | goto bad_format; | |
760 | ||
761 | DO_NUMBER (2, tp->tm_hour); | |
762 | ||
763 | case 'I': | |
764 | if (modifier == 'E') | |
765 | goto bad_format; | |
766 | ||
767 | DO_NUMBER (2, hour12); | |
768 | ||
769 | case 'k': /* GNU extension. */ | |
770 | if (modifier == 'E') | |
771 | goto bad_format; | |
772 | ||
773 | DO_NUMBER_SPACEPAD (2, tp->tm_hour); | |
774 | ||
775 | case 'l': /* GNU extension. */ | |
776 | if (modifier == 'E') | |
777 | goto bad_format; | |
778 | ||
779 | DO_NUMBER_SPACEPAD (2, hour12); | |
780 | ||
781 | case 'j': | |
782 | if (modifier == 'E') | |
783 | goto bad_format; | |
784 | ||
785 | DO_NUMBER (3, 1 + tp->tm_yday); | |
786 | ||
787 | case 'M': | |
788 | if (modifier == 'E') | |
789 | goto bad_format; | |
790 | ||
791 | DO_NUMBER (2, tp->tm_min); | |
792 | ||
793 | case 'm': | |
794 | if (modifier == 'E') | |
795 | goto bad_format; | |
796 | ||
797 | DO_NUMBER (2, tp->tm_mon + 1); | |
798 | ||
799 | case 'n': /* POSIX.2 extension. */ | |
800 | add (1, *p = '\n'); | |
801 | break; | |
802 | ||
803 | case 'P': | |
804 | to_lowcase = 1; | |
805 | /* FALLTHROUGH */ | |
806 | ||
807 | case 'p': | |
808 | cpy (ap_len, ampm); | |
809 | break; | |
810 | ||
811 | case 'R': /* GNU extension. */ | |
812 | subfmt = "%H:%M"; | |
813 | goto subformat; | |
814 | ||
815 | case 'r': /* POSIX.2 extension. */ | |
816 | #ifdef _NL_CURRENT | |
817 | if (*(subfmt = _NL_CURRENT (LC_TIME, T_FMT_AMPM)) == '\0') | |
818 | #endif | |
819 | subfmt = "%I:%M:%S %p"; | |
820 | goto subformat; | |
821 | ||
822 | case 'S': | |
823 | if (modifier == 'E') | |
824 | goto bad_format; | |
825 | ||
826 | DO_NUMBER (2, tp->tm_sec); | |
827 | ||
828 | case 's': /* GNU extension. */ | |
829 | { | |
830 | struct tm ltm; | |
831 | time_t t; | |
832 | ||
833 | ltm = *tp; | |
834 | t = mktime (<m); | |
835 | ||
836 | /* Generate string value for T using time_t arithmetic; | |
837 | this works even if sizeof (long) < sizeof (time_t). */ | |
838 | ||
839 | bufp = buf + sizeof (buf); | |
840 | negative_number = t < 0; | |
841 | ||
842 | do | |
843 | { | |
844 | int d = t % 10; | |
845 | t /= 10; | |
846 | ||
847 | if (negative_number) | |
848 | { | |
849 | d = -d; | |
850 | ||
851 | /* Adjust if division truncates to minus infinity. */ | |
852 | if (0 < -1 % 10 && d < 0) | |
853 | { | |
854 | t++; | |
855 | d += 10; | |
856 | } | |
857 | } | |
858 | ||
859 | *--bufp = d + '0'; | |
860 | } | |
861 | while (t != 0); | |
862 | ||
863 | digits = 1; | |
864 | goto do_number_sign_and_padding; | |
865 | } | |
866 | ||
867 | case 'X': | |
868 | if (modifier == 'O') | |
869 | goto bad_format; | |
870 | #ifdef _NL_CURRENT | |
871 | if (! (modifier == 'E' | |
872 | && *(subfmt = _NL_CURRENT (LC_TIME, ERA_T_FMT)) != '\0')) | |
873 | subfmt = _NL_CURRENT (LC_TIME, T_FMT); | |
874 | goto subformat; | |
875 | #endif | |
876 | /* Fall through. */ | |
877 | case 'T': /* POSIX.2 extension. */ | |
878 | subfmt = "%H:%M:%S"; | |
879 | goto subformat; | |
880 | ||
881 | case 't': /* POSIX.2 extension. */ | |
882 | add (1, *p = '\t'); | |
883 | break; | |
884 | ||
885 | case 'u': /* POSIX.2 extension. */ | |
886 | DO_NUMBER (1, (tp->tm_wday - 1 + 7) % 7 + 1); | |
887 | ||
888 | case 'U': | |
889 | if (modifier == 'E') | |
890 | goto bad_format; | |
891 | ||
892 | DO_NUMBER (2, (tp->tm_yday - tp->tm_wday + 7) / 7); | |
893 | ||
894 | case 'V': | |
895 | case 'g': /* GNU extension. */ | |
896 | case 'G': /* GNU extension. */ | |
897 | if (modifier == 'E') | |
898 | goto bad_format; | |
899 | { | |
900 | int year = tp->tm_year + TM_YEAR_BASE; | |
901 | int days = iso_week_days (tp->tm_yday, tp->tm_wday); | |
902 | ||
903 | if (days < 0) | |
904 | { | |
905 | /* This ISO week belongs to the previous year. */ | |
906 | year--; | |
907 | days = iso_week_days (tp->tm_yday + (365 + __isleap (year)), | |
908 | tp->tm_wday); | |
909 | } | |
910 | else | |
911 | { | |
912 | int d = iso_week_days (tp->tm_yday - (365 + __isleap (year)), | |
913 | tp->tm_wday); | |
914 | if (0 <= d) | |
915 | { | |
916 | /* This ISO week belongs to the next year. */ | |
917 | year++; | |
918 | days = d; | |
919 | } | |
920 | } | |
921 | ||
922 | switch (*f) | |
923 | { | |
924 | case 'g': | |
925 | DO_NUMBER (2, (year % 100 + 100) % 100); | |
926 | ||
927 | case 'G': | |
928 | DO_NUMBER (1, year); | |
929 | ||
930 | default: | |
931 | DO_NUMBER (2, days / 7 + 1); | |
932 | } | |
933 | } | |
934 | ||
935 | case 'W': | |
936 | if (modifier == 'E') | |
937 | goto bad_format; | |
938 | ||
939 | DO_NUMBER (2, (tp->tm_yday - (tp->tm_wday - 1 + 7) % 7 + 7) / 7); | |
940 | ||
941 | case 'w': | |
942 | if (modifier == 'E') | |
943 | goto bad_format; | |
944 | ||
945 | DO_NUMBER (1, tp->tm_wday); | |
946 | ||
947 | case 'Y': | |
948 | #if HAVE_STRUCT_ERA_ENTRY | |
949 | if (modifier == 'E') | |
950 | { | |
951 | struct era_entry *era = _nl_get_era_entry (tp); | |
952 | if (era) | |
953 | { | |
954 | subfmt = strchr (era->name_fmt, '\0') + 1; | |
955 | goto subformat; | |
956 | } | |
957 | } | |
958 | #endif | |
959 | if (modifier == 'O') | |
960 | goto bad_format; | |
961 | else | |
962 | DO_NUMBER (1, tp->tm_year + TM_YEAR_BASE); | |
963 | ||
964 | case 'y': | |
965 | #if HAVE_STRUCT_ERA_ENTRY | |
966 | if (modifier == 'E') | |
967 | { | |
968 | struct era_entry *era = _nl_get_era_entry (tp); | |
969 | if (era) | |
970 | { | |
971 | int delta = tp->tm_year - era->start_date[0]; | |
972 | DO_NUMBER (1, (era->offset | |
973 | + (era->direction == '-' ? -delta : delta))); | |
974 | } | |
975 | } | |
976 | #endif | |
977 | DO_NUMBER (2, (tp->tm_year % 100 + 100) % 100); | |
978 | ||
979 | case 'Z': | |
980 | cpy (zonelen, zone); | |
981 | break; | |
982 | ||
983 | case 'z': /* GNU extension. */ | |
984 | if (tp->tm_isdst < 0) | |
985 | break; | |
986 | ||
987 | { | |
988 | int diff; | |
989 | #if HAVE_TM_GMTOFF | |
990 | diff = tp->tm_gmtoff; | |
991 | #else | |
992 | struct tm gtm; | |
993 | struct tm ltm; | |
994 | time_t lt; | |
995 | ||
996 | ltm = *tp; | |
997 | lt = mktime (<m); | |
998 | ||
999 | if (lt == (time_t) -1) | |
1000 | { | |
1001 | /* mktime returns -1 for errors, but -1 is also a | |
1002 | valid time_t value. Check whether an error really | |
1003 | occurred. */ | |
1004 | struct tm tm; | |
1005 | localtime_r (<, &tm); | |
1006 | ||
1007 | if ((ltm.tm_sec ^ tm.tm_sec) | |
1008 | | (ltm.tm_min ^ tm.tm_min) | |
1009 | | (ltm.tm_hour ^ tm.tm_hour) | |
1010 | | (ltm.tm_mday ^ tm.tm_mday) | |
1011 | | (ltm.tm_mon ^ tm.tm_mon) | |
1012 | | (ltm.tm_year ^ tm.tm_year)) | |
1013 | break; | |
1014 | } | |
1015 | ||
1016 | if (! gmtime_r (<, >m)) | |
1017 | break; | |
1018 | ||
1019 | diff = tm_diff (<m, >m); | |
1020 | #endif | |
1021 | ||
1022 | if (diff < 0) | |
1023 | { | |
1024 | add (1, *p = '-'); | |
1025 | diff = -diff; | |
1026 | } | |
1027 | else | |
1028 | add (1, *p = '+'); | |
1029 | ||
1030 | diff /= 60; | |
1031 | DO_NUMBER (4, (diff / 60) * 100 + diff % 60); | |
1032 | } | |
1033 | ||
1034 | case '\0': /* GNU extension: % at end of format. */ | |
1035 | --f; | |
1036 | /* Fall through. */ | |
1037 | default: | |
1038 | /* Unknown format; output the format, including the '%', | |
1039 | since this is most likely the right thing to do if a | |
1040 | multibyte string has been misparsed. */ | |
1041 | bad_format: | |
1042 | { | |
1043 | int flen; | |
1044 | for (flen = 1; f[1 - flen] != '%'; flen++) | |
1045 | continue; | |
1046 | cpy (flen, &f[1 - flen]); | |
1047 | } | |
1048 | break; | |
1049 | } | |
1050 | } | |
1051 | ||
1052 | if (p) | |
1053 | *p = '\0'; | |
1054 | return i; | |
1055 | } |