Commit | Line | Data |
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68c45bf0 PE |
1 | /* Convert a `struct tm' to a time_t value. |
2 | Copyright (C) 1993, 94, 95, 96, 97, 98, 99 Free Software Foundation, Inc. | |
98f1928d PE |
3 | Contributed by Paul Eggert (eggert@twinsun.com). |
4 | ||
89752145 | 5 | NOTE: The canonical source of this file is maintained with the GNU C Library. |
06bd27fd | 6 | Bugs can be reported to bug-glibc@gnu.org. |
98f1928d | 7 | |
89752145 PE |
8 | This program is free software; you can redistribute it and/or modify it |
9 | under the terms of the GNU General Public License as published by the | |
10 | Free Software Foundation; either version 2, or (at your option) any | |
11 | later version. | |
98f1928d | 12 | |
89752145 PE |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
98f1928d | 17 | |
89752145 PE |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
21 | USA. */ | |
98f1928d PE |
22 | |
23 | /* Define this to have a standalone program to test this implementation of | |
24 | mktime. */ | |
25 | /* #define DEBUG 1 */ | |
26 | ||
27 | #ifdef HAVE_CONFIG_H | |
6385ec2b | 28 | # include <config.h> |
98f1928d PE |
29 | #endif |
30 | ||
31 | #ifdef _LIBC | |
32 | # define HAVE_LIMITS_H 1 | |
98f1928d PE |
33 | # define STDC_HEADERS 1 |
34 | #endif | |
35 | ||
36 | /* Assume that leap seconds are possible, unless told otherwise. | |
37 | If the host has a `zic' command with a `-L leapsecondfilename' option, | |
38 | then it supports leap seconds; otherwise it probably doesn't. */ | |
39 | #ifndef LEAP_SECONDS_POSSIBLE | |
6385ec2b | 40 | # define LEAP_SECONDS_POSSIBLE 1 |
98f1928d PE |
41 | #endif |
42 | ||
43 | #include <sys/types.h> /* Some systems define `time_t' here. */ | |
44 | #include <time.h> | |
45 | ||
46 | #if HAVE_LIMITS_H | |
6385ec2b | 47 | # include <limits.h> |
98f1928d PE |
48 | #endif |
49 | ||
50 | #if DEBUG | |
6385ec2b PE |
51 | # include <stdio.h> |
52 | # if STDC_HEADERS | |
53 | # include <stdlib.h> | |
54 | # endif | |
98f1928d | 55 | /* Make it work even if the system's libc has its own mktime routine. */ |
6385ec2b | 56 | # define mktime my_mktime |
98f1928d PE |
57 | #endif /* DEBUG */ |
58 | ||
59 | #ifndef __P | |
68c45bf0 | 60 | # if defined __GNUC__ || (defined __STDC__ && __STDC__) |
6385ec2b PE |
61 | # define __P(args) args |
62 | # else | |
63 | # define __P(args) () | |
64 | # endif /* GCC. */ | |
98f1928d PE |
65 | #endif /* Not __P. */ |
66 | ||
67 | #ifndef CHAR_BIT | |
6385ec2b | 68 | # define CHAR_BIT 8 |
98f1928d PE |
69 | #endif |
70 | ||
067cc4dc UD |
71 | /* The extra casts work around common compiler bugs. */ |
72 | #define TYPE_SIGNED(t) (! ((t) 0 < (t) -1)) | |
73 | /* The outer cast is needed to work around a bug in Cray C 5.0.3.0. | |
74 | It is necessary at least when t == time_t. */ | |
75 | #define TYPE_MINIMUM(t) ((t) (TYPE_SIGNED (t) \ | |
76 | ? ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1) : (t) 0)) | |
06bd27fd | 77 | #define TYPE_MAXIMUM(t) ((t) (~ (t) 0 - TYPE_MINIMUM (t))) |
067cc4dc | 78 | |
98f1928d | 79 | #ifndef INT_MIN |
067cc4dc | 80 | # define INT_MIN TYPE_MINIMUM (int) |
98f1928d PE |
81 | #endif |
82 | #ifndef INT_MAX | |
067cc4dc | 83 | # define INT_MAX TYPE_MAXIMUM (int) |
98f1928d PE |
84 | #endif |
85 | ||
86 | #ifndef TIME_T_MIN | |
067cc4dc | 87 | # define TIME_T_MIN TYPE_MINIMUM (time_t) |
98f1928d PE |
88 | #endif |
89 | #ifndef TIME_T_MAX | |
067cc4dc | 90 | # define TIME_T_MAX TYPE_MAXIMUM (time_t) |
98f1928d PE |
91 | #endif |
92 | ||
93 | #define TM_YEAR_BASE 1900 | |
94 | #define EPOCH_YEAR 1970 | |
95 | ||
96 | #ifndef __isleap | |
97 | /* Nonzero if YEAR is a leap year (every 4 years, | |
98 | except every 100th isn't, and every 400th is). */ | |
6385ec2b | 99 | # define __isleap(year) \ |
98f1928d PE |
100 | ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0)) |
101 | #endif | |
102 | ||
103 | /* How many days come before each month (0-12). */ | |
104 | const unsigned short int __mon_yday[2][13] = | |
105 | { | |
106 | /* Normal years. */ | |
107 | { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 }, | |
108 | /* Leap years. */ | |
109 | { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 } | |
110 | }; | |
111 | ||
98f1928d PE |
112 | |
113 | #ifdef _LIBC | |
68c45bf0 | 114 | # define my_mktime_localtime_r __localtime_r |
98f1928d | 115 | #else |
68c45bf0 PE |
116 | /* If we're a mktime substitute in a GNU program, then prefer |
117 | localtime to localtime_r, since many localtime_r implementations | |
118 | are buggy. */ | |
98f1928d | 119 | static struct tm * |
68c45bf0 | 120 | my_mktime_localtime_r (const time_t *t, struct tm *tp) |
98f1928d PE |
121 | { |
122 | struct tm *l = localtime (t); | |
123 | if (! l) | |
124 | return 0; | |
125 | *tp = *l; | |
126 | return tp; | |
127 | } | |
98f1928d PE |
128 | #endif /* ! _LIBC */ |
129 | ||
130 | ||
131 | /* Yield the difference between (YEAR-YDAY HOUR:MIN:SEC) and (*TP), | |
132 | measured in seconds, ignoring leap seconds. | |
133 | YEAR uses the same numbering as TM->tm_year. | |
134 | All values are in range, except possibly YEAR. | |
649e97a3 | 135 | If TP is null, return a nonzero value. |
98f1928d PE |
136 | If overflow occurs, yield the low order bits of the correct answer. */ |
137 | static time_t | |
68c45bf0 PE |
138 | ydhms_tm_diff (int year, int yday, int hour, int min, int sec, |
139 | const struct tm *tp) | |
98f1928d | 140 | { |
649e97a3 UD |
141 | if (!tp) |
142 | return 1; | |
143 | else | |
144 | { | |
145 | /* Compute intervening leap days correctly even if year is negative. | |
146 | Take care to avoid int overflow. time_t overflow is OK, since | |
147 | only the low order bits of the correct time_t answer are needed. | |
148 | Don't convert to time_t until after all divisions are done, since | |
149 | time_t might be unsigned. */ | |
150 | int a4 = (year >> 2) + (TM_YEAR_BASE >> 2) - ! (year & 3); | |
151 | int b4 = (tp->tm_year >> 2) + (TM_YEAR_BASE >> 2) - ! (tp->tm_year & 3); | |
152 | int a100 = a4 / 25 - (a4 % 25 < 0); | |
153 | int b100 = b4 / 25 - (b4 % 25 < 0); | |
154 | int a400 = a100 >> 2; | |
155 | int b400 = b100 >> 2; | |
156 | int intervening_leap_days = (a4 - b4) - (a100 - b100) + (a400 - b400); | |
157 | time_t years = year - (time_t) tp->tm_year; | |
158 | time_t days = (365 * years + intervening_leap_days | |
159 | + (yday - tp->tm_yday)); | |
160 | return (60 * (60 * (24 * days + (hour - tp->tm_hour)) | |
161 | + (min - tp->tm_min)) | |
162 | + (sec - tp->tm_sec)); | |
163 | } | |
98f1928d PE |
164 | } |
165 | ||
649e97a3 UD |
166 | /* Use CONVERT to convert *T to a broken down time in *TP. |
167 | If *T is out of range for conversion, adjust it so that | |
168 | it is the nearest in-range value and then convert that. */ | |
169 | static struct tm * | |
68c45bf0 PE |
170 | ranged_convert (struct tm *(*convert) (const time_t *, struct tm *), |
171 | time_t *t, struct tm *tp) | |
649e97a3 UD |
172 | { |
173 | struct tm *r; | |
174 | ||
175 | if (! (r = (*convert) (t, tp)) && *t) | |
176 | { | |
177 | time_t bad = *t; | |
178 | time_t ok = 0; | |
179 | struct tm tm; | |
180 | ||
181 | /* BAD is a known unconvertible time_t, and OK is a known good one. | |
182 | Use binary search to narrow the range between BAD and OK until | |
183 | they differ by 1. */ | |
184 | while (bad != ok + (bad < 0 ? -1 : 1)) | |
185 | { | |
186 | time_t mid = *t = (bad < 0 | |
187 | ? bad + ((ok - bad) >> 1) | |
188 | : ok + ((bad - ok) >> 1)); | |
189 | if ((r = (*convert) (t, tp))) | |
190 | { | |
191 | tm = *r; | |
192 | ok = mid; | |
193 | } | |
194 | else | |
195 | bad = mid; | |
196 | } | |
197 | ||
198 | if (!r && ok) | |
199 | { | |
200 | /* The last conversion attempt failed; | |
201 | revert to the most recent successful attempt. */ | |
202 | *t = ok; | |
203 | *tp = tm; | |
204 | r = tp; | |
205 | } | |
206 | } | |
207 | ||
208 | return r; | |
209 | } | |
210 | ||
211 | ||
98f1928d PE |
212 | /* Convert *TP to a time_t value, inverting |
213 | the monotonic and mostly-unit-linear conversion function CONVERT. | |
214 | Use *OFFSET to keep track of a guess at the offset of the result, | |
215 | compared to what the result would be for UTC without leap seconds. | |
216 | If *OFFSET's guess is correct, only one CONVERT call is needed. */ | |
217 | time_t | |
68c45bf0 PE |
218 | __mktime_internal (struct tm *tp, |
219 | struct tm *(*convert) (const time_t *, struct tm *), | |
220 | time_t *offset) | |
98f1928d | 221 | { |
68c45bf0 | 222 | time_t t, dt, t0, t1, t2; |
98f1928d PE |
223 | struct tm tm; |
224 | ||
225 | /* The maximum number of probes (calls to CONVERT) should be enough | |
226 | to handle any combinations of time zone rule changes, solar time, | |
68c45bf0 PE |
227 | leap seconds, and oscillations around a spring-forward gap. |
228 | POSIX.1 prohibits leap seconds, but some hosts have them anyway. */ | |
229 | int remaining_probes = 6; | |
98f1928d PE |
230 | |
231 | /* Time requested. Copy it in case CONVERT modifies *TP; this can | |
232 | occur if TP is localtime's returned value and CONVERT is localtime. */ | |
233 | int sec = tp->tm_sec; | |
234 | int min = tp->tm_min; | |
235 | int hour = tp->tm_hour; | |
236 | int mday = tp->tm_mday; | |
237 | int mon = tp->tm_mon; | |
238 | int year_requested = tp->tm_year; | |
239 | int isdst = tp->tm_isdst; | |
240 | ||
241 | /* Ensure that mon is in range, and set year accordingly. */ | |
242 | int mon_remainder = mon % 12; | |
243 | int negative_mon_remainder = mon_remainder < 0; | |
244 | int mon_years = mon / 12 - negative_mon_remainder; | |
245 | int year = year_requested + mon_years; | |
246 | ||
247 | /* The other values need not be in range: | |
248 | the remaining code handles minor overflows correctly, | |
249 | assuming int and time_t arithmetic wraps around. | |
250 | Major overflows are caught at the end. */ | |
251 | ||
252 | /* Calculate day of year from year, month, and day of month. | |
253 | The result need not be in range. */ | |
254 | int yday = ((__mon_yday[__isleap (year + TM_YEAR_BASE)] | |
255 | [mon_remainder + 12 * negative_mon_remainder]) | |
256 | + mday - 1); | |
257 | ||
89752145 | 258 | int sec_requested = sec; |
98f1928d PE |
259 | #if LEAP_SECONDS_POSSIBLE |
260 | /* Handle out-of-range seconds specially, | |
261 | since ydhms_tm_diff assumes every minute has 60 seconds. */ | |
98f1928d PE |
262 | if (sec < 0) |
263 | sec = 0; | |
264 | if (59 < sec) | |
265 | sec = 59; | |
266 | #endif | |
267 | ||
268 | /* Invert CONVERT by probing. First assume the same offset as last time. | |
269 | Then repeatedly use the error to improve the guess. */ | |
270 | ||
271 | tm.tm_year = EPOCH_YEAR - TM_YEAR_BASE; | |
272 | tm.tm_yday = tm.tm_hour = tm.tm_min = tm.tm_sec = 0; | |
273 | t0 = ydhms_tm_diff (year, yday, hour, min, sec, &tm); | |
274 | ||
68c45bf0 | 275 | for (t = t1 = t2 = t0 + *offset; |
649e97a3 UD |
276 | (dt = ydhms_tm_diff (year, yday, hour, min, sec, |
277 | ranged_convert (convert, &t, &tm))); | |
68c45bf0 PE |
278 | t1 = t2, t2 = t, t += dt) |
279 | if (t == t1 && t != t2 | |
280 | && (isdst < 0 || tm.tm_isdst < 0 | |
281 | || (isdst != 0) != (tm.tm_isdst != 0))) | |
282 | /* We can't possibly find a match, as we are oscillating | |
283 | between two values. The requested time probably falls | |
284 | within a spring-forward gap of size DT. Follow the common | |
285 | practice in this case, which is to return a time that is DT | |
286 | away from the requested time, preferring a time whose | |
287 | tm_isdst differs from the requested value. In practice, | |
288 | this is more useful than returning -1. */ | |
289 | break; | |
290 | else if (--remaining_probes == 0) | |
98f1928d PE |
291 | return -1; |
292 | ||
68c45bf0 PE |
293 | /* If we have a match, check whether tm.tm_isdst has the requested |
294 | value, if any. */ | |
295 | if (dt == 0 && isdst != tm.tm_isdst && 0 <= isdst && 0 <= tm.tm_isdst) | |
98f1928d | 296 | { |
68c45bf0 PE |
297 | /* tm.tm_isdst has the wrong value. Look for a neighboring |
298 | time with the right value, and use its UTC offset. | |
299 | Heuristic: probe the previous three calendar quarters (approximately), | |
300 | looking for the desired isdst. This isn't perfect, | |
301 | but it's good enough in practice. */ | |
302 | int quarter = 7889238; /* seconds per average 1/4 Gregorian year */ | |
303 | int i; | |
304 | ||
305 | /* If we're too close to the time_t limit, look in future quarters. */ | |
306 | if (t < TIME_T_MIN + 3 * quarter) | |
307 | quarter = -quarter; | |
308 | ||
309 | for (i = 1; i <= 3; i++) | |
98f1928d | 310 | { |
68c45bf0 PE |
311 | time_t ot = t - i * quarter; |
312 | struct tm otm; | |
313 | ranged_convert (convert, &ot, &otm); | |
314 | if (otm.tm_isdst == isdst) | |
98f1928d | 315 | { |
68c45bf0 PE |
316 | /* We found the desired tm_isdst. |
317 | Extrapolate back to the desired time. */ | |
318 | t = ot + ydhms_tm_diff (year, yday, hour, min, sec, &otm); | |
319 | ranged_convert (convert, &t, &tm); | |
320 | break; | |
98f1928d PE |
321 | } |
322 | } | |
323 | } | |
324 | ||
325 | *offset = t - t0; | |
326 | ||
327 | #if LEAP_SECONDS_POSSIBLE | |
328 | if (sec_requested != tm.tm_sec) | |
329 | { | |
330 | /* Adjust time to reflect the tm_sec requested, not the normalized value. | |
331 | Also, repair any damage from a false match due to a leap second. */ | |
332 | t += sec_requested - sec + (sec == 0 && tm.tm_sec == 60); | |
649e97a3 UD |
333 | if (! (*convert) (&t, &tm)) |
334 | return -1; | |
98f1928d PE |
335 | } |
336 | #endif | |
337 | ||
338 | if (TIME_T_MAX / INT_MAX / 366 / 24 / 60 / 60 < 3) | |
339 | { | |
340 | /* time_t isn't large enough to rule out overflows in ydhms_tm_diff, | |
341 | so check for major overflows. A gross check suffices, | |
342 | since if t has overflowed, it is off by a multiple of | |
343 | TIME_T_MAX - TIME_T_MIN + 1. So ignore any component of | |
344 | the difference that is bounded by a small value. */ | |
345 | ||
346 | double dyear = (double) year_requested + mon_years - tm.tm_year; | |
347 | double dday = 366 * dyear + mday; | |
348 | double dsec = 60 * (60 * (24 * dday + hour) + min) + sec_requested; | |
349 | ||
067cc4dc UD |
350 | /* On Irix4.0.5 cc, dividing TIME_T_MIN by 3 does not produce |
351 | correct results, ie., it erroneously gives a positive value | |
352 | of 715827882. Setting a variable first then doing math on it | |
353 | seems to work. (ghazi@caip.rutgers.edu) */ | |
354 | ||
355 | const time_t time_t_max = TIME_T_MAX; | |
356 | const time_t time_t_min = TIME_T_MIN; | |
357 | ||
358 | if (time_t_max / 3 - time_t_min / 3 < (dsec < 0 ? - dsec : dsec)) | |
98f1928d PE |
359 | return -1; |
360 | } | |
361 | ||
362 | *tp = tm; | |
363 | return t; | |
364 | } | |
365 | ||
68c45bf0 PE |
366 | |
367 | static time_t localtime_offset; | |
368 | ||
369 | /* Convert *TP to a time_t value. */ | |
370 | time_t | |
371 | mktime (tp) | |
372 | struct tm *tp; | |
373 | { | |
374 | #ifdef _LIBC | |
375 | /* POSIX.1 8.1.1 requires that whenever mktime() is called, the | |
376 | time zone names contained in the external variable `tzname' shall | |
377 | be set as if the tzset() function had been called. */ | |
378 | __tzset (); | |
379 | #endif | |
380 | ||
381 | return __mktime_internal (tp, my_mktime_localtime_r, &localtime_offset); | |
382 | } | |
383 | ||
98f1928d PE |
384 | #ifdef weak_alias |
385 | weak_alias (mktime, timelocal) | |
386 | #endif | |
387 | \f | |
388 | #if DEBUG | |
389 | ||
390 | static int | |
391 | not_equal_tm (a, b) | |
392 | struct tm *a; | |
393 | struct tm *b; | |
394 | { | |
395 | return ((a->tm_sec ^ b->tm_sec) | |
396 | | (a->tm_min ^ b->tm_min) | |
397 | | (a->tm_hour ^ b->tm_hour) | |
398 | | (a->tm_mday ^ b->tm_mday) | |
399 | | (a->tm_mon ^ b->tm_mon) | |
400 | | (a->tm_year ^ b->tm_year) | |
401 | | (a->tm_mday ^ b->tm_mday) | |
402 | | (a->tm_yday ^ b->tm_yday) | |
403 | | (a->tm_isdst ^ b->tm_isdst)); | |
404 | } | |
405 | ||
406 | static void | |
407 | print_tm (tp) | |
408 | struct tm *tp; | |
409 | { | |
649e97a3 UD |
410 | if (tp) |
411 | printf ("%04d-%02d-%02d %02d:%02d:%02d yday %03d wday %d isdst %d", | |
412 | tp->tm_year + TM_YEAR_BASE, tp->tm_mon + 1, tp->tm_mday, | |
413 | tp->tm_hour, tp->tm_min, tp->tm_sec, | |
414 | tp->tm_yday, tp->tm_wday, tp->tm_isdst); | |
415 | else | |
416 | printf ("0"); | |
98f1928d PE |
417 | } |
418 | ||
419 | static int | |
649e97a3 | 420 | check_result (tk, tmk, tl, lt) |
98f1928d PE |
421 | time_t tk; |
422 | struct tm tmk; | |
423 | time_t tl; | |
649e97a3 | 424 | struct tm *lt; |
98f1928d | 425 | { |
649e97a3 | 426 | if (tk != tl || !lt || not_equal_tm (&tmk, lt)) |
98f1928d PE |
427 | { |
428 | printf ("mktime ("); | |
429 | print_tm (&tmk); | |
430 | printf (")\nyields ("); | |
649e97a3 | 431 | print_tm (lt); |
98f1928d PE |
432 | printf (") == %ld, should be %ld\n", (long) tl, (long) tk); |
433 | return 1; | |
434 | } | |
435 | ||
436 | return 0; | |
437 | } | |
438 | ||
439 | int | |
440 | main (argc, argv) | |
441 | int argc; | |
442 | char **argv; | |
443 | { | |
444 | int status = 0; | |
445 | struct tm tm, tmk, tml; | |
649e97a3 | 446 | struct tm *lt; |
98f1928d PE |
447 | time_t tk, tl; |
448 | char trailer; | |
449 | ||
450 | if ((argc == 3 || argc == 4) | |
451 | && (sscanf (argv[1], "%d-%d-%d%c", | |
452 | &tm.tm_year, &tm.tm_mon, &tm.tm_mday, &trailer) | |
453 | == 3) | |
454 | && (sscanf (argv[2], "%d:%d:%d%c", | |
455 | &tm.tm_hour, &tm.tm_min, &tm.tm_sec, &trailer) | |
456 | == 3)) | |
457 | { | |
458 | tm.tm_year -= TM_YEAR_BASE; | |
459 | tm.tm_mon--; | |
460 | tm.tm_isdst = argc == 3 ? -1 : atoi (argv[3]); | |
461 | tmk = tm; | |
462 | tl = mktime (&tmk); | |
649e97a3 UD |
463 | lt = localtime (&tl); |
464 | if (lt) | |
465 | { | |
466 | tml = *lt; | |
467 | lt = &tml; | |
468 | } | |
98f1928d PE |
469 | printf ("mktime returns %ld == ", (long) tl); |
470 | print_tm (&tmk); | |
471 | printf ("\n"); | |
649e97a3 | 472 | status = check_result (tl, tmk, tl, lt); |
98f1928d PE |
473 | } |
474 | else if (argc == 4 || (argc == 5 && strcmp (argv[4], "-") == 0)) | |
475 | { | |
476 | time_t from = atol (argv[1]); | |
477 | time_t by = atol (argv[2]); | |
478 | time_t to = atol (argv[3]); | |
479 | ||
480 | if (argc == 4) | |
481 | for (tl = from; tl <= to; tl += by) | |
482 | { | |
649e97a3 UD |
483 | lt = localtime (&tl); |
484 | if (lt) | |
485 | { | |
486 | tmk = tml = *lt; | |
487 | tk = mktime (&tmk); | |
488 | status |= check_result (tk, tmk, tl, tml); | |
489 | } | |
490 | else | |
491 | { | |
492 | printf ("localtime (%ld) yields 0\n", (long) tl); | |
493 | status = 1; | |
494 | } | |
98f1928d PE |
495 | } |
496 | else | |
497 | for (tl = from; tl <= to; tl += by) | |
498 | { | |
499 | /* Null benchmark. */ | |
649e97a3 UD |
500 | lt = localtime (&tl); |
501 | if (lt) | |
502 | { | |
503 | tmk = tml = *lt; | |
504 | tk = tl; | |
505 | status |= check_result (tk, tmk, tl, tml); | |
506 | } | |
507 | else | |
508 | { | |
509 | printf ("localtime (%ld) yields 0\n", (long) tl); | |
510 | status = 1; | |
511 | } | |
98f1928d PE |
512 | } |
513 | } | |
514 | else | |
515 | printf ("Usage:\ | |
516 | \t%s YYYY-MM-DD HH:MM:SS [ISDST] # Test given time.\n\ | |
517 | \t%s FROM BY TO # Test values FROM, FROM+BY, ..., TO.\n\ | |
518 | \t%s FROM BY TO - # Do not test those values (for benchmark).\n", | |
519 | argv[0], argv[0], argv[0]); | |
520 | ||
521 | return status; | |
522 | } | |
523 | ||
524 | #endif /* DEBUG */ | |
525 | \f | |
526 | /* | |
527 | Local Variables: | |
68c45bf0 | 528 | compile-command: "gcc -DDEBUG -DHAVE_LIMITS_H -DSTDC_HEADERS -Wall -W -O -g mktime.c -o mktime" |
98f1928d PE |
529 | End: |
530 | */ |