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49fb5799 PE |
1 | /* Copyright (C) 1991, 92, 93, 94, 95, 96, 97 Free Software Foundation, Inc. |
2 | ||
5d23c612 MB |
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. | |
8ce9b63e | 5 | |
5d23c612 MB |
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. | |
8ce9b63e | 10 | |
5d23c612 MB |
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. | |
8ce9b63e | 15 | |
5d23c612 MB |
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. */ | |
49fb5799 PE |
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 | |
49fb5799 PE |
36 | # include "../locale/localeinfo.h" |
37 | #endif | |
38 | ||
39 | #include <ctype.h> | |
40 | #include <sys/types.h> /* Some systems define `time_t' here. */ | |
41 | ||
42 | #ifdef TIME_WITH_SYS_TIME | |
43 | # include <sys/time.h> | |
44 | # include <time.h> | |
45 | #else | |
46 | # ifdef HAVE_SYS_TIME_H | |
47 | # include <sys/time.h> | |
48 | # else | |
49 | # include <time.h> | |
50 | # endif | |
51 | #endif | |
52 | #if HAVE_TZNAME | |
53 | extern char *tzname[]; | |
54 | #endif | |
55 | ||
56 | /* Do multibyte processing if multibytes are supported, unless | |
57 | multibyte sequences are safe in formats. Multibyte sequences are | |
58 | safe if they cannot contain byte sequences that look like format | |
59 | conversion specifications. The GNU C Library uses UTF8 multibyte | |
60 | encoding, which is safe for formats, but strftime.c can be used | |
61 | with other C libraries that use unsafe encodings. */ | |
62 | #define DO_MULTIBYTE (HAVE_MBLEN && ! MULTIBYTE_IS_FORMAT_SAFE) | |
63 | ||
64 | #if DO_MULTIBYTE | |
65 | # if HAVE_MBRLEN | |
66 | # include <wchar.h> | |
67 | # else | |
68 | /* Simulate mbrlen with mblen as best we can. */ | |
69 | # define mbstate_t int | |
70 | # define mbrlen(s, n, ps) mblen (s, n) | |
71 | # define mbsinit(ps) (*(ps) == 0) | |
72 | # endif | |
73 | static const mbstate_t mbstate_zero; | |
74 | #endif | |
75 | ||
76 | #if HAVE_LIMITS_H | |
77 | # include <limits.h> | |
78 | #endif | |
79 | ||
80 | #if STDC_HEADERS | |
81 | # include <stddef.h> | |
82 | # include <stdlib.h> | |
83 | # include <string.h> | |
84 | #else | |
1b65a66c PE |
85 | # ifndef HAVE_MEMCPY |
86 | # define memcpy(d, s, n) bcopy ((s), (d), (n)) | |
87 | # endif | |
49fb5799 PE |
88 | #endif |
89 | ||
90 | #ifndef __P | |
91 | # if defined (__GNUC__) || (defined (__STDC__) && __STDC__) | |
92 | # define __P(args) args | |
93 | # else | |
94 | # define __P(args) () | |
95 | # endif /* GCC. */ | |
96 | #endif /* Not __P. */ | |
97 | ||
98 | #ifndef PTR | |
99 | # ifdef __STDC__ | |
100 | # define PTR void * | |
101 | # else | |
102 | # define PTR char * | |
103 | # endif | |
104 | #endif | |
105 | ||
106 | #ifndef CHAR_BIT | |
107 | # define CHAR_BIT 8 | |
108 | #endif | |
109 | ||
110 | #ifndef NULL | |
111 | # define NULL 0 | |
112 | #endif | |
113 | ||
114 | #define TYPE_SIGNED(t) ((t) -1 < 0) | |
115 | ||
116 | /* Bound on length of the string representing an integer value of type t. | |
117 | Subtract one for the sign bit if t is signed; | |
118 | 302 / 1000 is log10 (2) rounded up; | |
119 | add one for integer division truncation; | |
120 | add one more for a minus sign if t is signed. */ | |
121 | #define INT_STRLEN_BOUND(t) \ | |
122 | ((sizeof (t) * CHAR_BIT - TYPE_SIGNED (t)) * 302 / 100 + 1 + TYPE_SIGNED (t)) | |
123 | ||
124 | #define TM_YEAR_BASE 1900 | |
125 | ||
126 | #ifndef __isleap | |
127 | /* Nonzero if YEAR is a leap year (every 4 years, | |
128 | except every 100th isn't, and every 400th is). */ | |
129 | # define __isleap(year) \ | |
130 | ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0)) | |
131 | #endif | |
132 | ||
133 | ||
134 | #ifdef _LIBC | |
135 | # define gmtime_r __gmtime_r | |
136 | # define localtime_r __localtime_r | |
137 | extern int __tz_compute __P ((time_t timer, const struct tm *tm)); | |
138 | # define tzname __tzname | |
139 | # define tzset __tzset | |
140 | #else | |
141 | # if ! HAVE_LOCALTIME_R | |
142 | # if ! HAVE_TM_GMTOFF | |
143 | /* Approximate gmtime_r as best we can in its absence. */ | |
1b65a66c | 144 | # define gmtime_r my_gmtime_r |
49fb5799 PE |
145 | static struct tm *gmtime_r __P ((const time_t *, struct tm *)); |
146 | static struct tm * | |
147 | gmtime_r (t, tp) | |
148 | const time_t *t; | |
149 | struct tm *tp; | |
150 | { | |
151 | struct tm *l = gmtime (t); | |
152 | if (! l) | |
153 | return 0; | |
154 | *tp = *l; | |
155 | return tp; | |
156 | } | |
157 | # endif /* ! HAVE_TM_GMTOFF */ | |
158 | ||
159 | /* Approximate localtime_r as best we can in its absence. */ | |
1b65a66c | 160 | # define localtime_r my_ftime_localtime_r |
49fb5799 PE |
161 | static struct tm *localtime_r __P ((const time_t *, struct tm *)); |
162 | static struct tm * | |
163 | localtime_r (t, tp) | |
164 | const time_t *t; | |
165 | struct tm *tp; | |
166 | { | |
167 | struct tm *l = localtime (t); | |
168 | if (! l) | |
169 | return 0; | |
170 | *tp = *l; | |
171 | return tp; | |
172 | } | |
173 | # endif /* ! HAVE_LOCALTIME_R */ | |
174 | #endif /* ! defined (_LIBC) */ | |
175 | ||
176 | ||
1b65a66c | 177 | #if !defined memset && !defined HAVE_MEMSET && !defined _LIBC |
49fb5799 PE |
178 | /* Some systems lack the `memset' function and we don't want to |
179 | introduce additional dependencies. */ | |
c72e6644 RS |
180 | /* The SGI compiler reportedly barfs on the trailing null |
181 | if we use a string constant as the initializer. 28 June 1997, rms. */ | |
1b65a66c PE |
182 | static const char spaces[16] = /* " " */ |
183 | { ' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ' }; | |
184 | static const char zeroes[16] = /* "0000000000000000" */ | |
185 | { '0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0' }; | |
49fb5799 PE |
186 | |
187 | # define memset_space(P, Len) \ | |
188 | do { \ | |
189 | int _len = (Len); \ | |
190 | \ | |
191 | do \ | |
192 | { \ | |
193 | int _this = _len > 16 ? 16 : _len; \ | |
194 | memcpy ((P), spaces, _this); \ | |
195 | (P) += _this; \ | |
196 | _len -= _this; \ | |
197 | } \ | |
198 | while (_len > 0); \ | |
199 | } while (0) | |
098401cf PE |
200 | |
201 | # define memset_zero(P, Len) \ | |
202 | do { \ | |
203 | int _len = (Len); \ | |
204 | \ | |
205 | do \ | |
206 | { \ | |
207 | int _this = _len > 16 ? 16 : _len; \ | |
208 | memcpy ((P), zeroes, _this); \ | |
209 | (P) += _this; \ | |
210 | _len -= _this; \ | |
211 | } \ | |
212 | while (_len > 0); \ | |
213 | } while (0) | |
49fb5799 PE |
214 | #else |
215 | # define memset_space(P, Len) (memset ((P), ' ', (Len)), (P) += (Len)) | |
098401cf | 216 | # define memset_zero(P, Len) (memset ((P), '0', (Len)), (P) += (Len)) |
49fb5799 PE |
217 | #endif |
218 | ||
1b65a66c | 219 | #define add(n, f) \ |
49fb5799 PE |
220 | do \ |
221 | { \ | |
222 | int _n = (n); \ | |
223 | int _delta = width - _n; \ | |
224 | int _incr = _n + (_delta > 0 ? _delta : 0); \ | |
225 | if (i + _incr >= maxsize) \ | |
226 | return 0; \ | |
227 | if (p) \ | |
228 | { \ | |
229 | if (_delta > 0) \ | |
098401cf PE |
230 | { \ |
231 | if (pad == '0') \ | |
232 | memset_zero (p, _delta); \ | |
233 | else \ | |
234 | memset_space (p, _delta); \ | |
235 | } \ | |
49fb5799 PE |
236 | f; \ |
237 | p += _n; \ | |
238 | } \ | |
239 | i += _incr; \ | |
240 | } while (0) | |
241 | ||
1b65a66c | 242 | #define cpy(n, s) \ |
49fb5799 PE |
243 | add ((n), \ |
244 | if (to_lowcase) \ | |
245 | memcpy_lowcase (p, (s), _n); \ | |
246 | else if (to_uppcase) \ | |
247 | memcpy_uppcase (p, (s), _n); \ | |
248 | else \ | |
249 | memcpy ((PTR) p, (PTR) (s), _n)) | |
250 | ||
251 | ||
252 | ||
253 | #ifdef _LIBC | |
254 | # define TOUPPER(Ch) toupper (Ch) | |
255 | # define TOLOWER(Ch) tolower (Ch) | |
256 | #else | |
257 | # define TOUPPER(Ch) (islower (Ch) ? toupper (Ch) : (Ch)) | |
258 | # define TOLOWER(Ch) (isupper (Ch) ? tolower (Ch) : (Ch)) | |
259 | #endif | |
260 | /* We don't use `isdigit' here since the locale dependent | |
261 | interpretation is not what we want here. We only need to accept | |
262 | the arabic digits in the ASCII range. One day there is perhaps a | |
263 | more reliable way to accept other sets of digits. */ | |
264 | #define ISDIGIT(Ch) ((unsigned int) (Ch) - '0' <= 9) | |
265 | ||
266 | static char *memcpy_lowcase __P ((char *dest, const char *src, size_t len)); | |
267 | ||
268 | static char * | |
269 | memcpy_lowcase (dest, src, len) | |
270 | char *dest; | |
271 | const char *src; | |
272 | size_t len; | |
273 | { | |
274 | while (len-- > 0) | |
275 | dest[len] = TOLOWER (src[len]); | |
276 | return dest; | |
277 | } | |
278 | ||
279 | static char *memcpy_uppcase __P ((char *dest, const char *src, size_t len)); | |
280 | ||
281 | static char * | |
282 | memcpy_uppcase (dest, src, len) | |
283 | char *dest; | |
284 | const char *src; | |
285 | size_t len; | |
286 | { | |
287 | while (len-- > 0) | |
288 | dest[len] = TOUPPER (src[len]); | |
289 | return dest; | |
290 | } | |
291 | ||
1b65a66c | 292 | |
49fb5799 PE |
293 | #if ! HAVE_TM_GMTOFF |
294 | /* Yield the difference between *A and *B, | |
295 | measured in seconds, ignoring leap seconds. */ | |
1b65a66c | 296 | # define tm_diff ftime_tm_diff |
49fb5799 PE |
297 | static int tm_diff __P ((const struct tm *, const struct tm *)); |
298 | static int | |
299 | tm_diff (a, b) | |
300 | const struct tm *a; | |
301 | const struct tm *b; | |
302 | { | |
303 | /* Compute intervening leap days correctly even if year is negative. | |
304 | Take care to avoid int overflow in leap day calculations, | |
305 | but it's OK to assume that A and B are close to each other. */ | |
306 | int a4 = (a->tm_year >> 2) + (TM_YEAR_BASE >> 2) - ! (a->tm_year & 3); | |
307 | int b4 = (b->tm_year >> 2) + (TM_YEAR_BASE >> 2) - ! (b->tm_year & 3); | |
308 | int a100 = a4 / 25 - (a4 % 25 < 0); | |
309 | int b100 = b4 / 25 - (b4 % 25 < 0); | |
310 | int a400 = a100 >> 2; | |
311 | int b400 = b100 >> 2; | |
312 | int intervening_leap_days = (a4 - b4) - (a100 - b100) + (a400 - b400); | |
313 | int years = a->tm_year - b->tm_year; | |
314 | int days = (365 * years + intervening_leap_days | |
315 | + (a->tm_yday - b->tm_yday)); | |
316 | return (60 * (60 * (24 * days + (a->tm_hour - b->tm_hour)) | |
317 | + (a->tm_min - b->tm_min)) | |
318 | + (a->tm_sec - b->tm_sec)); | |
319 | } | |
320 | #endif /* ! HAVE_TM_GMTOFF */ | |
321 | ||
322 | ||
323 | ||
324 | /* The number of days from the first day of the first ISO week of this | |
325 | year to the year day YDAY with week day WDAY. ISO weeks start on | |
326 | Monday; the first ISO week has the year's first Thursday. YDAY may | |
327 | be as small as YDAY_MINIMUM. */ | |
328 | #define ISO_WEEK_START_WDAY 1 /* Monday */ | |
329 | #define ISO_WEEK1_WDAY 4 /* Thursday */ | |
330 | #define YDAY_MINIMUM (-366) | |
331 | static int iso_week_days __P ((int, int)); | |
332 | #ifdef __GNUC__ | |
333 | inline | |
334 | #endif | |
335 | static int | |
336 | iso_week_days (yday, wday) | |
337 | int yday; | |
338 | int wday; | |
339 | { | |
340 | /* Add enough to the first operand of % to make it nonnegative. */ | |
341 | int big_enough_multiple_of_7 = (-YDAY_MINIMUM / 7 + 2) * 7; | |
342 | return (yday | |
343 | - (yday - wday + ISO_WEEK1_WDAY + big_enough_multiple_of_7) % 7 | |
344 | + ISO_WEEK1_WDAY - ISO_WEEK_START_WDAY); | |
345 | } | |
346 | ||
347 | ||
348 | #ifndef _NL_CURRENT | |
349 | static char const weekday_name[][10] = | |
350 | { | |
351 | "Sunday", "Monday", "Tuesday", "Wednesday", | |
352 | "Thursday", "Friday", "Saturday" | |
353 | }; | |
354 | static char const month_name[][10] = | |
355 | { | |
356 | "January", "February", "March", "April", "May", "June", | |
357 | "July", "August", "September", "October", "November", "December" | |
358 | }; | |
359 | #endif | |
360 | ||
361 | ||
362 | #if !defined _LIBC && HAVE_TZNAME && HAVE_TZSET | |
363 | /* Solaris 2.5 tzset sometimes modifies the storage returned by localtime. | |
364 | Work around this bug by copying *tp before it might be munged. */ | |
365 | size_t _strftime_copytm __P ((char *, size_t, const char *, | |
366 | const struct tm *)); | |
367 | size_t | |
368 | strftime (s, maxsize, format, tp) | |
369 | char *s; | |
370 | size_t maxsize; | |
371 | const char *format; | |
372 | const struct tm *tp; | |
373 | { | |
374 | struct tm tmcopy; | |
375 | tmcopy = *tp; | |
376 | return _strftime_copytm (s, maxsize, format, &tmcopy); | |
377 | } | |
378 | # ifdef strftime | |
379 | # undef strftime | |
380 | # endif | |
381 | # define strftime(S, Maxsize, Format, Tp) \ | |
382 | _strftime_copytm (S, Maxsize, Format, Tp) | |
383 | #endif | |
384 | ||
385 | ||
386 | /* Write information from TP into S according to the format | |
387 | string FORMAT, writing no more that MAXSIZE characters | |
388 | (including the terminating '\0') and returning number of | |
389 | characters written. If S is NULL, nothing will be written | |
390 | anywhere, so to determine how many characters would be | |
391 | written, use NULL for S and (size_t) UINT_MAX for MAXSIZE. */ | |
392 | size_t | |
393 | strftime (s, maxsize, format, tp) | |
394 | char *s; | |
395 | size_t maxsize; | |
396 | const char *format; | |
397 | const struct tm *tp; | |
398 | { | |
399 | int hour12 = tp->tm_hour; | |
400 | #ifdef _NL_CURRENT | |
401 | const char *const a_wkday = _NL_CURRENT (LC_TIME, ABDAY_1 + tp->tm_wday); | |
402 | const char *const f_wkday = _NL_CURRENT (LC_TIME, DAY_1 + tp->tm_wday); | |
403 | const char *const a_month = _NL_CURRENT (LC_TIME, ABMON_1 + tp->tm_mon); | |
404 | const char *const f_month = _NL_CURRENT (LC_TIME, MON_1 + tp->tm_mon); | |
405 | const char *const ampm = _NL_CURRENT (LC_TIME, | |
406 | hour12 > 11 ? PM_STR : AM_STR); | |
407 | size_t aw_len = strlen (a_wkday); | |
408 | size_t am_len = strlen (a_month); | |
409 | size_t ap_len = strlen (ampm); | |
410 | #else | |
411 | const char *const f_wkday = weekday_name[tp->tm_wday]; | |
412 | const char *const f_month = month_name[tp->tm_mon]; | |
413 | const char *const a_wkday = f_wkday; | |
414 | const char *const a_month = f_month; | |
415 | const char *const ampm = "AMPM" + 2 * (hour12 > 11); | |
416 | size_t aw_len = 3; | |
417 | size_t am_len = 3; | |
418 | size_t ap_len = 2; | |
419 | #endif | |
420 | size_t wkday_len = strlen (f_wkday); | |
421 | size_t month_len = strlen (f_month); | |
422 | const char *zone; | |
423 | size_t zonelen; | |
424 | size_t i = 0; | |
425 | char *p = s; | |
426 | const char *f; | |
427 | ||
428 | zone = NULL; | |
1b65a66c PE |
429 | #if HAVE_TM_ZONE |
430 | /* The POSIX test suite assumes that setting | |
49fb5799 PE |
431 | the environment variable TZ to a new value before calling strftime() |
432 | will influence the result (the %Z format) even if the information in | |
1b65a66c PE |
433 | TP is computed with a totally different time zone. |
434 | This is bogus: though POSIX allows bad behavior like this, | |
435 | POSIX does not require it. Do the right thing instead. */ | |
49fb5799 PE |
436 | zone = (const char *) tp->tm_zone; |
437 | #endif | |
438 | #if HAVE_TZNAME | |
439 | /* POSIX.1 8.1.1 requires that whenever strftime() is called, the | |
440 | time zone names contained in the external variable `tzname' shall | |
441 | be set as if the tzset() function had been called. */ | |
442 | # if HAVE_TZSET | |
443 | tzset (); | |
444 | # endif | |
445 | ||
446 | if (!(zone && *zone) && tp->tm_isdst >= 0) | |
447 | zone = tzname[tp->tm_isdst]; | |
448 | #endif | |
449 | if (! zone) | |
450 | zone = ""; /* POSIX.2 requires the empty string here. */ | |
451 | ||
452 | zonelen = strlen (zone); | |
453 | ||
454 | if (hour12 > 12) | |
455 | hour12 -= 12; | |
456 | else | |
457 | if (hour12 == 0) hour12 = 12; | |
458 | ||
459 | for (f = format; *f != '\0'; ++f) | |
460 | { | |
461 | int pad; /* Padding for number ('-', '_', or 0). */ | |
462 | int modifier; /* Field modifier ('E', 'O', or 0). */ | |
463 | int digits; /* Max digits for numeric format. */ | |
464 | int number_value; /* Numeric value to be printed. */ | |
465 | int negative_number; /* 1 if the number is negative. */ | |
466 | const char *subfmt; | |
467 | char *bufp; | |
468 | char buf[1 + (sizeof (int) < sizeof (time_t) | |
469 | ? INT_STRLEN_BOUND (time_t) | |
470 | : INT_STRLEN_BOUND (int))]; | |
471 | int width = -1; | |
472 | int to_lowcase = 0; | |
473 | int to_uppcase = 0; | |
1b65a66c | 474 | int change_case = 0; |
49fb5799 PE |
475 | |
476 | #if DO_MULTIBYTE | |
477 | ||
478 | switch (*f) | |
479 | { | |
480 | case '%': | |
481 | break; | |
482 | ||
483 | case '\a': case '\b': case '\t': case '\n': | |
484 | case '\v': case '\f': case '\r': | |
485 | case ' ': case '!': case '"': case '#': case '&': case'\'': | |
486 | case '(': case ')': case '*': case '+': case ',': case '-': | |
487 | case '.': case '/': case '0': case '1': case '2': case '3': | |
488 | case '4': case '5': case '6': case '7': case '8': case '9': | |
489 | case ':': case ';': case '<': case '=': case '>': case '?': | |
490 | case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': | |
491 | case 'G': case 'H': case 'I': case 'J': case 'K': case 'L': | |
492 | case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R': | |
493 | case 'S': case 'T': case 'U': case 'V': case 'W': case 'X': | |
494 | case 'Y': case 'Z': case '[': case'\\': case ']': case '^': | |
495 | case '_': case 'a': case 'b': case 'c': case 'd': case 'e': | |
496 | case 'f': case 'g': case 'h': case 'i': case 'j': case 'k': | |
497 | case 'l': case 'm': case 'n': case 'o': case 'p': case 'q': | |
498 | case 'r': case 's': case 't': case 'u': case 'v': case 'w': | |
499 | case 'x': case 'y': case 'z': case '{': case '|': case '}': | |
500 | case '~': | |
501 | /* The C Standard requires these 98 characters (plus '%') to | |
502 | be in the basic execution character set. None of these | |
503 | characters can start a multibyte sequence, so they need | |
504 | not be analyzed further. */ | |
505 | add (1, *p = *f); | |
506 | continue; | |
507 | ||
508 | default: | |
509 | /* Copy this multibyte sequence until we reach its end, find | |
510 | an error, or come back to the initial shift state. */ | |
511 | { | |
512 | mbstate_t mbstate = mbstate_zero; | |
513 | size_t len = 0; | |
514 | ||
515 | do | |
516 | { | |
517 | size_t bytes = mbrlen (f + len, (size_t) -1, &mbstate); | |
518 | ||
519 | if (bytes == 0) | |
520 | break; | |
521 | ||
522 | if (bytes == (size_t) -2 || bytes == (size_t) -1) | |
523 | { | |
524 | len++; | |
525 | break; | |
526 | } | |
527 | ||
528 | len += bytes; | |
529 | } | |
530 | while (! mbsinit (&mbstate)); | |
531 | ||
532 | cpy (len, f); | |
533 | continue; | |
534 | } | |
535 | } | |
536 | ||
537 | #else /* ! DO_MULTIBYTE */ | |
538 | ||
539 | /* Either multibyte encodings are not supported, or they are | |
540 | safe for formats, so any non-'%' byte can be copied through. */ | |
541 | if (*f != '%') | |
542 | { | |
543 | add (1, *p = *f); | |
544 | continue; | |
545 | } | |
546 | ||
547 | #endif /* ! DO_MULTIBYTE */ | |
548 | ||
549 | /* Check for flags that can modify a format. */ | |
550 | pad = 0; | |
551 | while (1) | |
552 | { | |
553 | switch (*++f) | |
554 | { | |
555 | /* This influences the number formats. */ | |
556 | case '_': | |
557 | case '-': | |
558 | case '0': | |
559 | pad = *f; | |
560 | continue; | |
561 | ||
562 | /* This changes textual output. */ | |
563 | case '^': | |
564 | to_uppcase = 1; | |
565 | continue; | |
1b65a66c PE |
566 | case '#': |
567 | change_case = 1; | |
568 | continue; | |
49fb5799 PE |
569 | |
570 | default: | |
571 | break; | |
572 | } | |
573 | break; | |
574 | } | |
575 | ||
576 | /* As a GNU extension we allow to specify the field width. */ | |
577 | if (ISDIGIT (*f)) | |
578 | { | |
579 | width = 0; | |
580 | do | |
581 | { | |
582 | width *= 10; | |
583 | width += *f - '0'; | |
584 | ++f; | |
585 | } | |
586 | while (ISDIGIT (*f)); | |
587 | } | |
588 | ||
589 | /* Check for modifiers. */ | |
590 | switch (*f) | |
591 | { | |
592 | case 'E': | |
593 | case 'O': | |
594 | modifier = *f++; | |
595 | break; | |
596 | ||
597 | default: | |
598 | modifier = 0; | |
599 | break; | |
600 | } | |
601 | ||
602 | /* Now do the specified format. */ | |
603 | switch (*f) | |
604 | { | |
605 | #define DO_NUMBER(d, v) \ | |
1b65a66c PE |
606 | digits = width == -1 ? d : width; \ |
607 | number_value = v; goto do_number | |
49fb5799 | 608 | #define DO_NUMBER_SPACEPAD(d, v) \ |
1b65a66c PE |
609 | digits = width == -1 ? d : width; \ |
610 | number_value = v; goto do_number_spacepad | |
49fb5799 PE |
611 | |
612 | case '%': | |
613 | if (modifier != 0) | |
614 | goto bad_format; | |
615 | add (1, *p = *f); | |
616 | break; | |
617 | ||
618 | case 'a': | |
619 | if (modifier != 0) | |
620 | goto bad_format; | |
1b65a66c PE |
621 | if (change_case) |
622 | { | |
623 | to_uppcase = 1; | |
624 | to_lowcase = 0; | |
625 | } | |
49fb5799 PE |
626 | cpy (aw_len, a_wkday); |
627 | break; | |
628 | ||
629 | case 'A': | |
630 | if (modifier != 0) | |
631 | goto bad_format; | |
1b65a66c PE |
632 | if (change_case) |
633 | { | |
634 | to_uppcase = 1; | |
635 | to_lowcase = 0; | |
636 | } | |
49fb5799 PE |
637 | cpy (wkday_len, f_wkday); |
638 | break; | |
639 | ||
640 | case 'b': | |
641 | case 'h': /* POSIX.2 extension. */ | |
642 | if (modifier != 0) | |
643 | goto bad_format; | |
644 | cpy (am_len, a_month); | |
645 | break; | |
646 | ||
647 | case 'B': | |
648 | if (modifier != 0) | |
649 | goto bad_format; | |
1b65a66c PE |
650 | if (change_case) |
651 | { | |
652 | to_uppcase = 1; | |
653 | to_lowcase = 0; | |
654 | } | |
49fb5799 PE |
655 | cpy (month_len, f_month); |
656 | break; | |
657 | ||
658 | case 'c': | |
659 | if (modifier == 'O') | |
660 | goto bad_format; | |
661 | #ifdef _NL_CURRENT | |
662 | if (! (modifier == 'E' | |
663 | && *(subfmt = _NL_CURRENT (LC_TIME, ERA_D_T_FMT)) != '\0')) | |
664 | subfmt = _NL_CURRENT (LC_TIME, D_T_FMT); | |
665 | #else | |
666 | subfmt = "%a %b %e %H:%M:%S %Y"; | |
667 | #endif | |
668 | ||
669 | subformat: | |
670 | { | |
671 | char *old_start = p; | |
672 | size_t len = strftime (NULL, maxsize - i, subfmt, tp); | |
673 | if (len == 0 && *subfmt) | |
674 | return 0; | |
675 | add (len, strftime (p, maxsize - i, subfmt, tp)); | |
676 | ||
677 | if (to_uppcase) | |
678 | while (old_start < p) | |
679 | { | |
680 | *old_start = TOUPPER (*old_start); | |
681 | ++old_start; | |
682 | } | |
683 | } | |
684 | break; | |
685 | ||
686 | case 'C': /* POSIX.2 extension. */ | |
687 | if (modifier == 'O') | |
688 | goto bad_format; | |
689 | #if HAVE_STRUCT_ERA_ENTRY | |
690 | if (modifier == 'E') | |
691 | { | |
692 | struct era_entry *era = _nl_get_era_entry (tp); | |
693 | if (era) | |
694 | { | |
695 | size_t len = strlen (era->name_fmt); | |
696 | cpy (len, era->name_fmt); | |
697 | break; | |
698 | } | |
699 | } | |
700 | #endif | |
701 | { | |
702 | int year = tp->tm_year + TM_YEAR_BASE; | |
703 | DO_NUMBER (1, year / 100 - (year % 100 < 0)); | |
704 | } | |
705 | ||
706 | case 'x': | |
707 | if (modifier == 'O') | |
708 | goto bad_format; | |
709 | #ifdef _NL_CURRENT | |
710 | if (! (modifier == 'E' | |
711 | && *(subfmt = _NL_CURRENT (LC_TIME, ERA_D_FMT)) != '\0')) | |
712 | subfmt = _NL_CURRENT (LC_TIME, D_FMT); | |
713 | goto subformat; | |
714 | #endif | |
715 | /* Fall through. */ | |
716 | case 'D': /* POSIX.2 extension. */ | |
717 | if (modifier != 0) | |
718 | goto bad_format; | |
719 | subfmt = "%m/%d/%y"; | |
720 | goto subformat; | |
721 | ||
722 | case 'd': | |
723 | if (modifier == 'E') | |
724 | goto bad_format; | |
725 | ||
726 | DO_NUMBER (2, tp->tm_mday); | |
727 | ||
728 | case 'e': /* POSIX.2 extension. */ | |
729 | if (modifier == 'E') | |
730 | goto bad_format; | |
731 | ||
732 | DO_NUMBER_SPACEPAD (2, tp->tm_mday); | |
733 | ||
734 | /* All numeric formats set DIGITS and NUMBER_VALUE and then | |
735 | jump to one of these two labels. */ | |
736 | ||
737 | do_number_spacepad: | |
738 | /* Force `_' flag unless overwritten by `0' flag. */ | |
739 | if (pad != '0') | |
740 | pad = '_'; | |
741 | ||
742 | do_number: | |
743 | /* Format the number according to the MODIFIER flag. */ | |
744 | ||
745 | #ifdef _NL_CURRENT | |
746 | if (modifier == 'O' && 0 <= number_value) | |
747 | { | |
748 | /* Get the locale specific alternate representation of | |
749 | the number NUMBER_VALUE. If none exist NULL is returned. */ | |
750 | const char *cp = _nl_get_alt_digit (number_value); | |
751 | ||
752 | if (cp != NULL) | |
753 | { | |
754 | size_t digitlen = strlen (cp); | |
755 | if (digitlen != 0) | |
756 | { | |
757 | cpy (digitlen, cp); | |
758 | break; | |
759 | } | |
760 | } | |
761 | } | |
762 | #endif | |
763 | { | |
764 | unsigned int u = number_value; | |
765 | ||
766 | bufp = buf + sizeof (buf); | |
767 | negative_number = number_value < 0; | |
768 | ||
769 | if (negative_number) | |
770 | u = -u; | |
771 | ||
772 | do | |
773 | *--bufp = u % 10 + '0'; | |
774 | while ((u /= 10) != 0); | |
775 | } | |
776 | ||
777 | do_number_sign_and_padding: | |
778 | if (negative_number) | |
779 | *--bufp = '-'; | |
780 | ||
781 | if (pad != '-') | |
782 | { | |
783 | int padding = digits - (buf + sizeof (buf) - bufp); | |
784 | ||
785 | if (pad == '_') | |
786 | { | |
787 | while (0 < padding--) | |
788 | *--bufp = ' '; | |
789 | } | |
790 | else | |
791 | { | |
792 | bufp += negative_number; | |
793 | while (0 < padding--) | |
794 | *--bufp = '0'; | |
795 | if (negative_number) | |
796 | *--bufp = '-'; | |
797 | } | |
798 | } | |
799 | ||
800 | cpy (buf + sizeof (buf) - bufp, bufp); | |
801 | break; | |
802 | ||
803 | ||
804 | case 'H': | |
805 | if (modifier == 'E') | |
806 | goto bad_format; | |
807 | ||
808 | DO_NUMBER (2, tp->tm_hour); | |
809 | ||
810 | case 'I': | |
811 | if (modifier == 'E') | |
812 | goto bad_format; | |
813 | ||
814 | DO_NUMBER (2, hour12); | |
815 | ||
816 | case 'k': /* GNU extension. */ | |
817 | if (modifier == 'E') | |
818 | goto bad_format; | |
819 | ||
820 | DO_NUMBER_SPACEPAD (2, tp->tm_hour); | |
821 | ||
822 | case 'l': /* GNU extension. */ | |
823 | if (modifier == 'E') | |
824 | goto bad_format; | |
825 | ||
826 | DO_NUMBER_SPACEPAD (2, hour12); | |
827 | ||
828 | case 'j': | |
829 | if (modifier == 'E') | |
830 | goto bad_format; | |
831 | ||
832 | DO_NUMBER (3, 1 + tp->tm_yday); | |
833 | ||
834 | case 'M': | |
835 | if (modifier == 'E') | |
836 | goto bad_format; | |
837 | ||
838 | DO_NUMBER (2, tp->tm_min); | |
839 | ||
840 | case 'm': | |
841 | if (modifier == 'E') | |
842 | goto bad_format; | |
843 | ||
844 | DO_NUMBER (2, tp->tm_mon + 1); | |
845 | ||
846 | case 'n': /* POSIX.2 extension. */ | |
847 | add (1, *p = '\n'); | |
848 | break; | |
849 | ||
850 | case 'P': | |
851 | to_lowcase = 1; | |
852 | /* FALLTHROUGH */ | |
853 | ||
854 | case 'p': | |
1b65a66c PE |
855 | if (change_case) |
856 | { | |
857 | to_uppcase = 0; | |
858 | to_lowcase = 1; | |
859 | } | |
49fb5799 PE |
860 | cpy (ap_len, ampm); |
861 | break; | |
862 | ||
863 | case 'R': /* GNU extension. */ | |
864 | subfmt = "%H:%M"; | |
865 | goto subformat; | |
866 | ||
867 | case 'r': /* POSIX.2 extension. */ | |
868 | #ifdef _NL_CURRENT | |
869 | if (*(subfmt = _NL_CURRENT (LC_TIME, T_FMT_AMPM)) == '\0') | |
870 | #endif | |
871 | subfmt = "%I:%M:%S %p"; | |
872 | goto subformat; | |
873 | ||
874 | case 'S': | |
875 | if (modifier == 'E') | |
876 | goto bad_format; | |
877 | ||
878 | DO_NUMBER (2, tp->tm_sec); | |
879 | ||
880 | case 's': /* GNU extension. */ | |
881 | { | |
882 | struct tm ltm; | |
883 | time_t t; | |
884 | ||
885 | ltm = *tp; | |
886 | t = mktime (<m); | |
887 | ||
888 | /* Generate string value for T using time_t arithmetic; | |
889 | this works even if sizeof (long) < sizeof (time_t). */ | |
890 | ||
891 | bufp = buf + sizeof (buf); | |
892 | negative_number = t < 0; | |
893 | ||
894 | do | |
895 | { | |
896 | int d = t % 10; | |
897 | t /= 10; | |
898 | ||
899 | if (negative_number) | |
900 | { | |
901 | d = -d; | |
902 | ||
903 | /* Adjust if division truncates to minus infinity. */ | |
904 | if (0 < -1 % 10 && d < 0) | |
905 | { | |
906 | t++; | |
907 | d += 10; | |
908 | } | |
909 | } | |
910 | ||
911 | *--bufp = d + '0'; | |
912 | } | |
913 | while (t != 0); | |
914 | ||
915 | digits = 1; | |
916 | goto do_number_sign_and_padding; | |
917 | } | |
918 | ||
919 | case 'X': | |
920 | if (modifier == 'O') | |
921 | goto bad_format; | |
922 | #ifdef _NL_CURRENT | |
923 | if (! (modifier == 'E' | |
924 | && *(subfmt = _NL_CURRENT (LC_TIME, ERA_T_FMT)) != '\0')) | |
925 | subfmt = _NL_CURRENT (LC_TIME, T_FMT); | |
926 | goto subformat; | |
927 | #endif | |
928 | /* Fall through. */ | |
929 | case 'T': /* POSIX.2 extension. */ | |
930 | subfmt = "%H:%M:%S"; | |
931 | goto subformat; | |
932 | ||
933 | case 't': /* POSIX.2 extension. */ | |
934 | add (1, *p = '\t'); | |
935 | break; | |
936 | ||
937 | case 'u': /* POSIX.2 extension. */ | |
938 | DO_NUMBER (1, (tp->tm_wday - 1 + 7) % 7 + 1); | |
939 | ||
940 | case 'U': | |
941 | if (modifier == 'E') | |
942 | goto bad_format; | |
943 | ||
944 | DO_NUMBER (2, (tp->tm_yday - tp->tm_wday + 7) / 7); | |
945 | ||
946 | case 'V': | |
947 | case 'g': /* GNU extension. */ | |
948 | case 'G': /* GNU extension. */ | |
949 | if (modifier == 'E') | |
950 | goto bad_format; | |
951 | { | |
952 | int year = tp->tm_year + TM_YEAR_BASE; | |
953 | int days = iso_week_days (tp->tm_yday, tp->tm_wday); | |
954 | ||
955 | if (days < 0) | |
956 | { | |
957 | /* This ISO week belongs to the previous year. */ | |
958 | year--; | |
959 | days = iso_week_days (tp->tm_yday + (365 + __isleap (year)), | |
960 | tp->tm_wday); | |
961 | } | |
962 | else | |
963 | { | |
964 | int d = iso_week_days (tp->tm_yday - (365 + __isleap (year)), | |
965 | tp->tm_wday); | |
966 | if (0 <= d) | |
967 | { | |
968 | /* This ISO week belongs to the next year. */ | |
969 | year++; | |
970 | days = d; | |
971 | } | |
972 | } | |
973 | ||
974 | switch (*f) | |
975 | { | |
976 | case 'g': | |
977 | DO_NUMBER (2, (year % 100 + 100) % 100); | |
978 | ||
979 | case 'G': | |
980 | DO_NUMBER (1, year); | |
981 | ||
982 | default: | |
983 | DO_NUMBER (2, days / 7 + 1); | |
984 | } | |
985 | } | |
986 | ||
987 | case 'W': | |
988 | if (modifier == 'E') | |
989 | goto bad_format; | |
990 | ||
991 | DO_NUMBER (2, (tp->tm_yday - (tp->tm_wday - 1 + 7) % 7 + 7) / 7); | |
992 | ||
993 | case 'w': | |
994 | if (modifier == 'E') | |
995 | goto bad_format; | |
996 | ||
997 | DO_NUMBER (1, tp->tm_wday); | |
998 | ||
999 | case 'Y': | |
1000 | #if HAVE_STRUCT_ERA_ENTRY | |
1001 | if (modifier == 'E') | |
1002 | { | |
1003 | struct era_entry *era = _nl_get_era_entry (tp); | |
1004 | if (era) | |
1005 | { | |
1006 | subfmt = strchr (era->name_fmt, '\0') + 1; | |
1007 | goto subformat; | |
1008 | } | |
1009 | } | |
1010 | #endif | |
1011 | if (modifier == 'O') | |
1012 | goto bad_format; | |
1013 | else | |
1014 | DO_NUMBER (1, tp->tm_year + TM_YEAR_BASE); | |
1015 | ||
1016 | case 'y': | |
1017 | #if HAVE_STRUCT_ERA_ENTRY | |
1018 | if (modifier == 'E') | |
1019 | { | |
1020 | struct era_entry *era = _nl_get_era_entry (tp); | |
1021 | if (era) | |
1022 | { | |
1023 | int delta = tp->tm_year - era->start_date[0]; | |
1024 | DO_NUMBER (1, (era->offset | |
1025 | + (era->direction == '-' ? -delta : delta))); | |
1026 | } | |
1027 | } | |
1028 | #endif | |
1029 | DO_NUMBER (2, (tp->tm_year % 100 + 100) % 100); | |
1030 | ||
1031 | case 'Z': | |
1b65a66c PE |
1032 | if (change_case) |
1033 | { | |
1034 | to_uppcase = 0; | |
1035 | to_lowcase = 1; | |
1036 | } | |
49fb5799 PE |
1037 | cpy (zonelen, zone); |
1038 | break; | |
1039 | ||
1040 | case 'z': /* GNU extension. */ | |
1041 | if (tp->tm_isdst < 0) | |
1042 | break; | |
1043 | ||
1044 | { | |
1045 | int diff; | |
1046 | #if HAVE_TM_GMTOFF | |
1047 | diff = tp->tm_gmtoff; | |
1048 | #else | |
1049 | struct tm gtm; | |
1050 | struct tm ltm; | |
1051 | time_t lt; | |
1052 | ||
1053 | ltm = *tp; | |
1054 | lt = mktime (<m); | |
1055 | ||
1056 | if (lt == (time_t) -1) | |
1057 | { | |
1058 | /* mktime returns -1 for errors, but -1 is also a | |
1059 | valid time_t value. Check whether an error really | |
1060 | occurred. */ | |
1061 | struct tm tm; | |
1062 | localtime_r (<, &tm); | |
1063 | ||
1064 | if ((ltm.tm_sec ^ tm.tm_sec) | |
1065 | | (ltm.tm_min ^ tm.tm_min) | |
1066 | | (ltm.tm_hour ^ tm.tm_hour) | |
1067 | | (ltm.tm_mday ^ tm.tm_mday) | |
1068 | | (ltm.tm_mon ^ tm.tm_mon) | |
1069 | | (ltm.tm_year ^ tm.tm_year)) | |
1070 | break; | |
1071 | } | |
1072 | ||
1073 | if (! gmtime_r (<, >m)) | |
1074 | break; | |
1075 | ||
1076 | diff = tm_diff (<m, >m); | |
1077 | #endif | |
1078 | ||
1079 | if (diff < 0) | |
1080 | { | |
1081 | add (1, *p = '-'); | |
1082 | diff = -diff; | |
1083 | } | |
1084 | else | |
1085 | add (1, *p = '+'); | |
1086 | ||
1087 | diff /= 60; | |
1088 | DO_NUMBER (4, (diff / 60) * 100 + diff % 60); | |
1089 | } | |
1090 | ||
1091 | case '\0': /* GNU extension: % at end of format. */ | |
1092 | --f; | |
1093 | /* Fall through. */ | |
1094 | default: | |
1095 | /* Unknown format; output the format, including the '%', | |
1096 | since this is most likely the right thing to do if a | |
1097 | multibyte string has been misparsed. */ | |
1098 | bad_format: | |
1099 | { | |
1100 | int flen; | |
1101 | for (flen = 1; f[1 - flen] != '%'; flen++) | |
1102 | continue; | |
1103 | cpy (flen, &f[1 - flen]); | |
1104 | } | |
1105 | break; | |
1106 | } | |
1107 | } | |
1108 | ||
1109 | if (p) | |
1110 | *p = '\0'; | |
1111 | return i; | |
1112 | } |