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1dfee75f | 1 | /* Copyright (C) 1993, 94, 95, 96, 97, 98 Free Software Foundation, Inc. |
5290baf0 | 2 | This file is part of the GNU C Library. |
80fd7387 | 3 | Contributed by Paul Eggert (eggert@twinsun.com). |
28f540f4 | 4 | |
5290baf0 UD |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Library General Public License as | |
7 | published by the Free Software Foundation; either version 2 of the | |
8 | License, or (at your option) any later version. | |
28f540f4 | 9 | |
5290baf0 UD |
10 | The GNU C Library 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 GNU | |
13 | Library General Public License for more details. | |
28f540f4 | 14 | |
5290baf0 UD |
15 | You should have received a copy of the GNU Library General Public |
16 | License along with the GNU C Library; see the file COPYING.LIB. If not, | |
17 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
18 | Boston, MA 02111-1307, USA. */ | |
28f540f4 RM |
19 | |
20 | /* Define this to have a standalone program to test this implementation of | |
21 | mktime. */ | |
80fd7387 | 22 | /* #define DEBUG 1 */ |
28f540f4 RM |
23 | |
24 | #ifdef HAVE_CONFIG_H | |
9c2322bc | 25 | # include <config.h> |
28f540f4 RM |
26 | #endif |
27 | ||
1dfee75f | 28 | /* Some systems need this in order to declare localtime_r properly. */ |
f43ce637 UD |
29 | #ifndef _REENTRANT |
30 | # define _REENTRANT 1 | |
31 | #endif | |
32 | ||
c0e45674 UD |
33 | #ifdef _LIBC |
34 | # define HAVE_LIMITS_H 1 | |
35 | # define HAVE_LOCALTIME_R 1 | |
36 | # define STDC_HEADERS 1 | |
37 | #endif | |
38 | ||
80fd7387 RM |
39 | /* Assume that leap seconds are possible, unless told otherwise. |
40 | If the host has a `zic' command with a `-L leapsecondfilename' option, | |
41 | then it supports leap seconds; otherwise it probably doesn't. */ | |
42 | #ifndef LEAP_SECONDS_POSSIBLE | |
9c2322bc | 43 | # define LEAP_SECONDS_POSSIBLE 1 |
80fd7387 RM |
44 | #endif |
45 | ||
28f540f4 RM |
46 | #include <sys/types.h> /* Some systems define `time_t' here. */ |
47 | #include <time.h> | |
48 | ||
c0e45674 | 49 | #if HAVE_LIMITS_H |
9c2322bc | 50 | # include <limits.h> |
80fd7387 | 51 | #endif |
28f540f4 | 52 | |
80fd7387 | 53 | #if DEBUG |
9c2322bc UD |
54 | # include <stdio.h> |
55 | # if STDC_HEADERS | |
56 | # include <stdlib.h> | |
57 | # endif | |
80fd7387 | 58 | /* Make it work even if the system's libc has its own mktime routine. */ |
9c2322bc | 59 | # define mktime my_mktime |
80fd7387 | 60 | #endif /* DEBUG */ |
28f540f4 RM |
61 | |
62 | #ifndef __P | |
9c2322bc UD |
63 | # if defined (__GNUC__) || (defined (__STDC__) && __STDC__) |
64 | # define __P(args) args | |
65 | # else | |
66 | # define __P(args) () | |
67 | # endif /* GCC. */ | |
28f540f4 RM |
68 | #endif /* Not __P. */ |
69 | ||
80fd7387 | 70 | #ifndef CHAR_BIT |
9c2322bc | 71 | # define CHAR_BIT 8 |
28f540f4 RM |
72 | #endif |
73 | ||
1dfee75f UD |
74 | /* The extra casts work around common compiler bugs. */ |
75 | #define TYPE_SIGNED(t) (! ((t) 0 < (t) -1)) | |
76 | /* The outer cast is needed to work around a bug in Cray C 5.0.3.0. | |
77 | It is necessary at least when t == time_t. */ | |
78 | #define TYPE_MINIMUM(t) ((t) (TYPE_SIGNED (t) \ | |
79 | ? ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1) : (t) 0)) | |
36fafd9c | 80 | #define TYPE_MAXIMUM(t) ((t) (~ (t) 0 - TYPE_MINIMUM (t))) |
1dfee75f | 81 | |
80fd7387 | 82 | #ifndef INT_MIN |
1dfee75f | 83 | # define INT_MIN TYPE_MINIMUM (int) |
28f540f4 | 84 | #endif |
80fd7387 | 85 | #ifndef INT_MAX |
1dfee75f | 86 | # define INT_MAX TYPE_MAXIMUM (int) |
28f540f4 | 87 | #endif |
28f540f4 | 88 | |
80fd7387 | 89 | #ifndef TIME_T_MIN |
1dfee75f | 90 | # define TIME_T_MIN TYPE_MINIMUM (time_t) |
28f540f4 | 91 | #endif |
80fd7387 | 92 | #ifndef TIME_T_MAX |
1dfee75f | 93 | # define TIME_T_MAX TYPE_MAXIMUM (time_t) |
28f540f4 | 94 | #endif |
28f540f4 | 95 | |
80fd7387 RM |
96 | #define TM_YEAR_BASE 1900 |
97 | #define EPOCH_YEAR 1970 | |
28f540f4 | 98 | |
80fd7387 RM |
99 | #ifndef __isleap |
100 | /* Nonzero if YEAR is a leap year (every 4 years, | |
101 | except every 100th isn't, and every 400th is). */ | |
9c2322bc | 102 | # define __isleap(year) \ |
80fd7387 | 103 | ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0)) |
28f540f4 | 104 | #endif |
28f540f4 | 105 | |
80fd7387 RM |
106 | /* How many days come before each month (0-12). */ |
107 | const unsigned short int __mon_yday[2][13] = | |
108 | { | |
109 | /* Normal years. */ | |
110 | { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 }, | |
111 | /* Leap years. */ | |
112 | { 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 } | |
113 | }; | |
28f540f4 | 114 | |
fe0ec73e UD |
115 | static struct tm *ranged_convert __P ((struct tm *(*) __P ((const time_t *, |
116 | struct tm *)), | |
117 | time_t *, struct tm *)); | |
80fd7387 RM |
118 | static time_t ydhms_tm_diff __P ((int, int, int, int, int, const struct tm *)); |
119 | time_t __mktime_internal __P ((struct tm *, | |
120 | struct tm *(*) (const time_t *, struct tm *), | |
121 | time_t *)); | |
28f540f4 | 122 | |
28f540f4 | 123 | |
c2216480 | 124 | #ifdef _LIBC |
9c2322bc | 125 | # define localtime_r __localtime_r |
c2216480 | 126 | #else |
9c2322bc | 127 | # if ! HAVE_LOCALTIME_R && ! defined localtime_r |
c2216480 | 128 | /* Approximate localtime_r as best we can in its absence. */ |
9c2322bc | 129 | # define localtime_r my_mktime_localtime_r |
80fd7387 | 130 | static struct tm *localtime_r __P ((const time_t *, struct tm *)); |
c2216480 RM |
131 | static struct tm * |
132 | localtime_r (t, tp) | |
133 | const time_t *t; | |
134 | struct tm *tp; | |
80fd7387 | 135 | { |
c2216480 RM |
136 | struct tm *l = localtime (t); |
137 | if (! l) | |
3f33a4ce | 138 | return 0; |
c2216480 RM |
139 | *tp = *l; |
140 | return tp; | |
141 | } | |
9c2322bc | 142 | # endif /* ! HAVE_LOCALTIME_R && ! defined (localtime_r) */ |
c0e45674 | 143 | #endif /* ! _LIBC */ |
c2216480 | 144 | |
80fd7387 RM |
145 | |
146 | /* Yield the difference between (YEAR-YDAY HOUR:MIN:SEC) and (*TP), | |
147 | measured in seconds, ignoring leap seconds. | |
148 | YEAR uses the same numbering as TM->tm_year. | |
149 | All values are in range, except possibly YEAR. | |
fe0ec73e | 150 | If TP is null, return a nonzero value. |
80fd7387 RM |
151 | If overflow occurs, yield the low order bits of the correct answer. */ |
152 | static time_t | |
153 | ydhms_tm_diff (year, yday, hour, min, sec, tp) | |
154 | int year, yday, hour, min, sec; | |
155 | const struct tm *tp; | |
156 | { | |
fe0ec73e UD |
157 | if (!tp) |
158 | return 1; | |
159 | else | |
160 | { | |
161 | /* Compute intervening leap days correctly even if year is negative. | |
162 | Take care to avoid int overflow. time_t overflow is OK, since | |
163 | only the low order bits of the correct time_t answer are needed. | |
164 | Don't convert to time_t until after all divisions are done, since | |
165 | time_t might be unsigned. */ | |
166 | int a4 = (year >> 2) + (TM_YEAR_BASE >> 2) - ! (year & 3); | |
167 | int b4 = (tp->tm_year >> 2) + (TM_YEAR_BASE >> 2) - ! (tp->tm_year & 3); | |
168 | int a100 = a4 / 25 - (a4 % 25 < 0); | |
169 | int b100 = b4 / 25 - (b4 % 25 < 0); | |
170 | int a400 = a100 >> 2; | |
171 | int b400 = b100 >> 2; | |
172 | int intervening_leap_days = (a4 - b4) - (a100 - b100) + (a400 - b400); | |
173 | time_t years = year - (time_t) tp->tm_year; | |
174 | time_t days = (365 * years + intervening_leap_days | |
175 | + (yday - tp->tm_yday)); | |
176 | return (60 * (60 * (24 * days + (hour - tp->tm_hour)) | |
177 | + (min - tp->tm_min)) | |
178 | + (sec - tp->tm_sec)); | |
179 | } | |
80fd7387 RM |
180 | } |
181 | ||
182 | ||
be10a868 RM |
183 | static time_t localtime_offset; |
184 | ||
80fd7387 | 185 | /* Convert *TP to a time_t value. */ |
28f540f4 | 186 | time_t |
80fd7387 RM |
187 | mktime (tp) |
188 | struct tm *tp; | |
28f540f4 | 189 | { |
5290baf0 | 190 | #ifdef _LIBC |
9d187dd4 UD |
191 | /* POSIX.1 8.1.1 requires that whenever mktime() is called, the |
192 | time zone names contained in the external variable `tzname' shall | |
193 | be set as if the tzset() function had been called. */ | |
194 | __tzset (); | |
5290baf0 UD |
195 | #endif |
196 | ||
80fd7387 | 197 | return __mktime_internal (tp, localtime_r, &localtime_offset); |
28f540f4 RM |
198 | } |
199 | ||
fe0ec73e UD |
200 | /* Use CONVERT to convert *T to a broken down time in *TP. |
201 | If *T is out of range for conversion, adjust it so that | |
202 | it is the nearest in-range value and then convert that. */ | |
203 | static struct tm * | |
204 | ranged_convert (convert, t, tp) | |
205 | struct tm *(*convert) __P ((const time_t *, struct tm *)); | |
206 | time_t *t; | |
207 | struct tm *tp; | |
208 | { | |
209 | struct tm *r; | |
210 | ||
211 | if (! (r = (*convert) (t, tp)) && *t) | |
212 | { | |
213 | time_t bad = *t; | |
214 | time_t ok = 0; | |
215 | struct tm tm; | |
216 | ||
217 | /* BAD is a known unconvertible time_t, and OK is a known good one. | |
218 | Use binary search to narrow the range between BAD and OK until | |
219 | they differ by 1. */ | |
220 | while (bad != ok + (bad < 0 ? -1 : 1)) | |
221 | { | |
222 | time_t mid = *t = (bad < 0 | |
223 | ? bad + ((ok - bad) >> 1) | |
224 | : ok + ((bad - ok) >> 1)); | |
225 | if ((r = (*convert) (t, tp))) | |
226 | { | |
227 | tm = *r; | |
228 | ok = mid; | |
229 | } | |
230 | else | |
231 | bad = mid; | |
232 | } | |
233 | ||
234 | if (!r && ok) | |
235 | { | |
236 | /* The last conversion attempt failed; | |
237 | revert to the most recent successful attempt. */ | |
238 | *t = ok; | |
239 | *tp = tm; | |
240 | r = tp; | |
241 | } | |
242 | } | |
243 | ||
244 | return r; | |
245 | } | |
246 | ||
247 | ||
80fd7387 RM |
248 | /* Convert *TP to a time_t value, inverting |
249 | the monotonic and mostly-unit-linear conversion function CONVERT. | |
250 | Use *OFFSET to keep track of a guess at the offset of the result, | |
251 | compared to what the result would be for UTC without leap seconds. | |
252 | If *OFFSET's guess is correct, only one CONVERT call is needed. */ | |
253 | time_t | |
254 | __mktime_internal (tp, convert, offset) | |
255 | struct tm *tp; | |
256 | struct tm *(*convert) __P ((const time_t *, struct tm *)); | |
257 | time_t *offset; | |
28f540f4 | 258 | { |
80fd7387 RM |
259 | time_t t, dt, t0; |
260 | struct tm tm; | |
261 | ||
262 | /* The maximum number of probes (calls to CONVERT) should be enough | |
263 | to handle any combinations of time zone rule changes, solar time, | |
cc3fa755 | 264 | and leap seconds. POSIX.1 prohibits leap seconds, but some hosts |
80fd7387 RM |
265 | have them anyway. */ |
266 | int remaining_probes = 4; | |
267 | ||
268 | /* Time requested. Copy it in case CONVERT modifies *TP; this can | |
269 | occur if TP is localtime's returned value and CONVERT is localtime. */ | |
270 | int sec = tp->tm_sec; | |
271 | int min = tp->tm_min; | |
272 | int hour = tp->tm_hour; | |
273 | int mday = tp->tm_mday; | |
274 | int mon = tp->tm_mon; | |
275 | int year_requested = tp->tm_year; | |
276 | int isdst = tp->tm_isdst; | |
277 | ||
278 | /* Ensure that mon is in range, and set year accordingly. */ | |
279 | int mon_remainder = mon % 12; | |
280 | int negative_mon_remainder = mon_remainder < 0; | |
281 | int mon_years = mon / 12 - negative_mon_remainder; | |
282 | int year = year_requested + mon_years; | |
283 | ||
284 | /* The other values need not be in range: | |
285 | the remaining code handles minor overflows correctly, | |
286 | assuming int and time_t arithmetic wraps around. | |
287 | Major overflows are caught at the end. */ | |
288 | ||
289 | /* Calculate day of year from year, month, and day of month. | |
290 | The result need not be in range. */ | |
291 | int yday = ((__mon_yday[__isleap (year + TM_YEAR_BASE)] | |
292 | [mon_remainder + 12 * negative_mon_remainder]) | |
293 | + mday - 1); | |
294 | ||
9a0a462c | 295 | int sec_requested = sec; |
80fd7387 RM |
296 | #if LEAP_SECONDS_POSSIBLE |
297 | /* Handle out-of-range seconds specially, | |
298 | since ydhms_tm_diff assumes every minute has 60 seconds. */ | |
80fd7387 RM |
299 | if (sec < 0) |
300 | sec = 0; | |
301 | if (59 < sec) | |
302 | sec = 59; | |
303 | #endif | |
304 | ||
305 | /* Invert CONVERT by probing. First assume the same offset as last time. | |
306 | Then repeatedly use the error to improve the guess. */ | |
307 | ||
308 | tm.tm_year = EPOCH_YEAR - TM_YEAR_BASE; | |
309 | tm.tm_yday = tm.tm_hour = tm.tm_min = tm.tm_sec = 0; | |
310 | t0 = ydhms_tm_diff (year, yday, hour, min, sec, &tm); | |
28f540f4 | 311 | |
80fd7387 | 312 | for (t = t0 + *offset; |
fe0ec73e UD |
313 | (dt = ydhms_tm_diff (year, yday, hour, min, sec, |
314 | ranged_convert (convert, &t, &tm))); | |
80fd7387 RM |
315 | t += dt) |
316 | if (--remaining_probes == 0) | |
317 | return -1; | |
318 | ||
319 | /* Check whether tm.tm_isdst has the requested value, if any. */ | |
320 | if (0 <= isdst && 0 <= tm.tm_isdst) | |
321 | { | |
322 | int dst_diff = (isdst != 0) - (tm.tm_isdst != 0); | |
323 | if (dst_diff) | |
28f540f4 | 324 | { |
80fd7387 RM |
325 | /* Move two hours in the direction indicated by the disagreement, |
326 | probe some more, and switch to a new time if found. | |
327 | The largest known fallback due to daylight savings is two hours: | |
328 | once, in Newfoundland, 1988-10-30 02:00 -> 00:00. */ | |
329 | time_t ot = t - 2 * 60 * 60 * dst_diff; | |
330 | while (--remaining_probes != 0) | |
331 | { | |
332 | struct tm otm; | |
333 | if (! (dt = ydhms_tm_diff (year, yday, hour, min, sec, | |
fe0ec73e | 334 | ranged_convert (convert, &ot, &otm)))) |
80fd7387 RM |
335 | { |
336 | t = ot; | |
337 | tm = otm; | |
338 | break; | |
339 | } | |
340 | if ((ot += dt) == t) | |
341 | break; /* Avoid a redundant probe. */ | |
342 | } | |
28f540f4 | 343 | } |
80fd7387 | 344 | } |
28f540f4 | 345 | |
80fd7387 RM |
346 | *offset = t - t0; |
347 | ||
348 | #if LEAP_SECONDS_POSSIBLE | |
349 | if (sec_requested != tm.tm_sec) | |
350 | { | |
351 | /* Adjust time to reflect the tm_sec requested, not the normalized value. | |
352 | Also, repair any damage from a false match due to a leap second. */ | |
353 | t += sec_requested - sec + (sec == 0 && tm.tm_sec == 60); | |
fe0ec73e UD |
354 | if (! (*convert) (&t, &tm)) |
355 | return -1; | |
28f540f4 | 356 | } |
80fd7387 RM |
357 | #endif |
358 | ||
359 | if (TIME_T_MAX / INT_MAX / 366 / 24 / 60 / 60 < 3) | |
28f540f4 | 360 | { |
80fd7387 RM |
361 | /* time_t isn't large enough to rule out overflows in ydhms_tm_diff, |
362 | so check for major overflows. A gross check suffices, | |
363 | since if t has overflowed, it is off by a multiple of | |
364 | TIME_T_MAX - TIME_T_MIN + 1. So ignore any component of | |
365 | the difference that is bounded by a small value. */ | |
366 | ||
367 | double dyear = (double) year_requested + mon_years - tm.tm_year; | |
368 | double dday = 366 * dyear + mday; | |
369 | double dsec = 60 * (60 * (24 * dday + hour) + min) + sec_requested; | |
370 | ||
1dfee75f UD |
371 | /* On Irix4.0.5 cc, dividing TIME_T_MIN by 3 does not produce |
372 | correct results, ie., it erroneously gives a positive value | |
373 | of 715827882. Setting a variable first then doing math on it | |
374 | seems to work. (ghazi@caip.rutgers.edu) */ | |
375 | ||
376 | const time_t time_t_max = TIME_T_MAX; | |
377 | const time_t time_t_min = TIME_T_MIN; | |
378 | ||
379 | if (time_t_max / 3 - time_t_min / 3 < (dsec < 0 ? - dsec : dsec)) | |
80fd7387 | 380 | return -1; |
28f540f4 | 381 | } |
80fd7387 RM |
382 | |
383 | *tp = tm; | |
384 | return t; | |
385 | } | |
386 | ||
387 | #ifdef weak_alias | |
388 | weak_alias (mktime, timelocal) | |
28f540f4 | 389 | #endif |
80fd7387 RM |
390 | \f |
391 | #if DEBUG | |
28f540f4 | 392 | |
80fd7387 RM |
393 | static int |
394 | not_equal_tm (a, b) | |
395 | struct tm *a; | |
396 | struct tm *b; | |
397 | { | |
398 | return ((a->tm_sec ^ b->tm_sec) | |
399 | | (a->tm_min ^ b->tm_min) | |
400 | | (a->tm_hour ^ b->tm_hour) | |
401 | | (a->tm_mday ^ b->tm_mday) | |
402 | | (a->tm_mon ^ b->tm_mon) | |
403 | | (a->tm_year ^ b->tm_year) | |
404 | | (a->tm_mday ^ b->tm_mday) | |
405 | | (a->tm_yday ^ b->tm_yday) | |
406 | | (a->tm_isdst ^ b->tm_isdst)); | |
407 | } | |
28f540f4 | 408 | |
80fd7387 RM |
409 | static void |
410 | print_tm (tp) | |
411 | struct tm *tp; | |
412 | { | |
fe0ec73e UD |
413 | if (tp) |
414 | printf ("%04d-%02d-%02d %02d:%02d:%02d yday %03d wday %d isdst %d", | |
415 | tp->tm_year + TM_YEAR_BASE, tp->tm_mon + 1, tp->tm_mday, | |
416 | tp->tm_hour, tp->tm_min, tp->tm_sec, | |
417 | tp->tm_yday, tp->tm_wday, tp->tm_isdst); | |
418 | else | |
419 | printf ("0"); | |
80fd7387 | 420 | } |
28f540f4 | 421 | |
80fd7387 | 422 | static int |
fe0ec73e | 423 | check_result (tk, tmk, tl, lt) |
80fd7387 RM |
424 | time_t tk; |
425 | struct tm tmk; | |
426 | time_t tl; | |
fe0ec73e | 427 | struct tm *lt; |
80fd7387 | 428 | { |
fe0ec73e | 429 | if (tk != tl || !lt || not_equal_tm (&tmk, lt)) |
80fd7387 RM |
430 | { |
431 | printf ("mktime ("); | |
432 | print_tm (&tmk); | |
433 | printf (")\nyields ("); | |
fe0ec73e | 434 | print_tm (lt); |
80fd7387 RM |
435 | printf (") == %ld, should be %ld\n", (long) tl, (long) tk); |
436 | return 1; | |
437 | } | |
438 | ||
439 | return 0; | |
440 | } | |
28f540f4 | 441 | |
80fd7387 RM |
442 | int |
443 | main (argc, argv) | |
444 | int argc; | |
445 | char **argv; | |
446 | { | |
447 | int status = 0; | |
448 | struct tm tm, tmk, tml; | |
fe0ec73e | 449 | struct tm *lt; |
80fd7387 RM |
450 | time_t tk, tl; |
451 | char trailer; | |
452 | ||
453 | if ((argc == 3 || argc == 4) | |
454 | && (sscanf (argv[1], "%d-%d-%d%c", | |
455 | &tm.tm_year, &tm.tm_mon, &tm.tm_mday, &trailer) | |
456 | == 3) | |
457 | && (sscanf (argv[2], "%d:%d:%d%c", | |
458 | &tm.tm_hour, &tm.tm_min, &tm.tm_sec, &trailer) | |
459 | == 3)) | |
460 | { | |
461 | tm.tm_year -= TM_YEAR_BASE; | |
462 | tm.tm_mon--; | |
463 | tm.tm_isdst = argc == 3 ? -1 : atoi (argv[3]); | |
464 | tmk = tm; | |
465 | tl = mktime (&tmk); | |
fe0ec73e UD |
466 | lt = localtime (&tl); |
467 | if (lt) | |
468 | { | |
469 | tml = *lt; | |
470 | lt = &tml; | |
471 | } | |
80fd7387 RM |
472 | printf ("mktime returns %ld == ", (long) tl); |
473 | print_tm (&tmk); | |
474 | printf ("\n"); | |
fe0ec73e | 475 | status = check_result (tl, tmk, tl, lt); |
80fd7387 RM |
476 | } |
477 | else if (argc == 4 || (argc == 5 && strcmp (argv[4], "-") == 0)) | |
478 | { | |
479 | time_t from = atol (argv[1]); | |
480 | time_t by = atol (argv[2]); | |
481 | time_t to = atol (argv[3]); | |
28f540f4 | 482 | |
80fd7387 RM |
483 | if (argc == 4) |
484 | for (tl = from; tl <= to; tl += by) | |
485 | { | |
fe0ec73e UD |
486 | lt = localtime (&tl); |
487 | if (lt) | |
488 | { | |
489 | tmk = tml = *lt; | |
490 | tk = mktime (&tmk); | |
491 | status |= check_result (tk, tmk, tl, tml); | |
492 | } | |
493 | else | |
494 | { | |
495 | printf ("localtime (%ld) yields 0\n", (long) tl); | |
496 | status = 1; | |
497 | } | |
80fd7387 RM |
498 | } |
499 | else | |
500 | for (tl = from; tl <= to; tl += by) | |
501 | { | |
502 | /* Null benchmark. */ | |
fe0ec73e UD |
503 | lt = localtime (&tl); |
504 | if (lt) | |
505 | { | |
506 | tmk = tml = *lt; | |
507 | tk = tl; | |
508 | status |= check_result (tk, tmk, tl, tml); | |
509 | } | |
510 | else | |
511 | { | |
512 | printf ("localtime (%ld) yields 0\n", (long) tl); | |
513 | status = 1; | |
514 | } | |
80fd7387 RM |
515 | } |
516 | } | |
517 | else | |
518 | printf ("Usage:\ | |
519 | \t%s YYYY-MM-DD HH:MM:SS [ISDST] # Test given time.\n\ | |
520 | \t%s FROM BY TO # Test values FROM, FROM+BY, ..., TO.\n\ | |
521 | \t%s FROM BY TO - # Do not test those values (for benchmark).\n", | |
522 | argv[0], argv[0], argv[0]); | |
523 | ||
524 | return status; | |
28f540f4 | 525 | } |
28f540f4 | 526 | |
80fd7387 | 527 | #endif /* DEBUG */ |
28f540f4 RM |
528 | \f |
529 | /* | |
530 | Local Variables: | |
fe0ec73e | 531 | compile-command: "gcc -DDEBUG -D__EXTENSIONS__ -DHAVE_LIMITS_H -DHAVE_LOCALTIME_R -DSTDC_HEADERS -Wall -W -O -g mktime.c -o mktime" |
28f540f4 RM |
532 | End: |
533 | */ |