2 Unix SMB/CIFS implementation.
3 time handling functions
5 Copyright (C) Andrew Tridgell 1992-2004
6 Copyright (C) Stefan (metze) Metzmacher 2002
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
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.
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., 675 Mass Ave, Cambridge, MA 02139, USA.
24 #include "system/time.h"
30 #define TIME_T_MAX (~(time_t)0)
33 /*******************************************************************
34 External access to time_t_min and time_t_max.
35 ********************************************************************/
36 time_t get_time_t_max(void)
41 /*******************************************************************
42 a gettimeofday wrapper
43 ********************************************************************/
44 void GetTimeOfDay(struct timeval *tval)
46 #ifdef HAVE_GETTIMEOFDAY_TZ
47 gettimeofday(tval,NULL);
54 #define TIME_FIXUP_CONSTANT 11644473600LL
56 /****************************************************************************
57 interpret an 8 byte "filetime" structure to a time_t
58 It's originally in "100ns units since jan 1st 1601"
59 ****************************************************************************/
60 time_t nt_time_to_unix(NTTIME nt)
70 nt -= TIME_FIXUP_CONSTANT;
72 if (TIME_T_MIN >= nt || nt >= TIME_T_MAX) {
80 /****************************************************************************
81 put a 8 byte filetime from a time_t
82 This takes GMT as input
83 ****************************************************************************/
84 void unix_to_nt_time(NTTIME *nt, time_t t)
88 if (t == (time_t)-1) {
98 t2 += TIME_FIXUP_CONSTANT;
105 /****************************************************************************
106 check if it's a null unix time
107 ****************************************************************************/
108 BOOL null_time(time_t t)
111 t == (time_t)0xFFFFFFFF ||
115 /*******************************************************************
116 create a 16 bit dos packed date
117 ********************************************************************/
118 static uint16_t make_dos_date1(struct tm *t)
121 ret = (((uint_t)(t->tm_mon+1)) >> 3) | ((t->tm_year-80) << 1);
122 ret = ((ret&0xFF)<<8) | (t->tm_mday | (((t->tm_mon+1) & 0x7) << 5));
126 /*******************************************************************
127 create a 16 bit dos packed time
128 ********************************************************************/
129 static uint16_t make_dos_time1(struct tm *t)
132 ret = ((((uint_t)t->tm_min >> 3)&0x7) | (((uint_t)t->tm_hour) << 3));
133 ret = ((ret&0xFF)<<8) | ((t->tm_sec/2) | ((t->tm_min & 0x7) << 5));
137 /*******************************************************************
138 create a 32 bit dos packed date/time from some parameters
139 This takes a GMT time and returns a packed localtime structure
140 ********************************************************************/
141 static uint32_t make_dos_date(time_t unixdate, int zone_offset)
150 unixdate -= zone_offset;
152 t = gmtime(&unixdate);
157 ret = make_dos_date1(t);
158 ret = ((ret&0xFFFF)<<16) | make_dos_time1(t);
163 /*******************************************************************
164 put a dos date into a buffer (time/date format)
165 This takes GMT time and puts local time in the buffer
166 ********************************************************************/
167 void push_dos_date(uint8_t *buf, int offset, time_t unixdate, int zone_offset)
169 uint32_t x = make_dos_date(unixdate, zone_offset);
173 /*******************************************************************
174 put a dos date into a buffer (date/time format)
175 This takes GMT time and puts local time in the buffer
176 ********************************************************************/
177 void push_dos_date2(uint8_t *buf,int offset,time_t unixdate, int zone_offset)
180 x = make_dos_date(unixdate, zone_offset);
181 x = ((x&0xFFFF)<<16) | ((x&0xFFFF0000)>>16);
185 /*******************************************************************
186 put a dos 32 bit "unix like" date into a buffer. This routine takes
187 GMT and converts it to LOCAL time before putting it (most SMBs assume
188 localtime for this sort of date)
189 ********************************************************************/
190 void push_dos_date3(uint8_t *buf,int offset,time_t unixdate, int zone_offset)
192 if (!null_time(unixdate)) {
193 unixdate -= zone_offset;
195 SIVAL(buf,offset,unixdate);
198 /*******************************************************************
199 interpret a 32 bit dos packed date/time to some parameters
200 ********************************************************************/
201 static void interpret_dos_date(uint32_t date,int *year,int *month,int *day,int *hour,int *minute,int *second)
203 uint32_t p0,p1,p2,p3;
205 p0=date&0xFF; p1=((date&0xFF00)>>8)&0xFF;
206 p2=((date&0xFF0000)>>16)&0xFF; p3=((date&0xFF000000)>>24)&0xFF;
208 *second = 2*(p0 & 0x1F);
209 *minute = ((p0>>5)&0xFF) + ((p1&0x7)<<3);
210 *hour = (p1>>3)&0xFF;
212 *month = ((p2>>5)&0xFF) + ((p3&0x1)<<3) - 1;
213 *year = ((p3>>1)&0xFF) + 80;
216 /*******************************************************************
217 create a unix date (int GMT) from a dos date (which is actually in
219 ********************************************************************/
220 time_t pull_dos_date(const uint8_t *date_ptr, int zone_offset)
226 dos_date = IVAL(date_ptr,0);
228 if (dos_date == 0) return (time_t)0;
230 interpret_dos_date(dos_date,&t.tm_year,&t.tm_mon,
231 &t.tm_mday,&t.tm_hour,&t.tm_min,&t.tm_sec);
241 /*******************************************************************
242 like make_unix_date() but the words are reversed
243 ********************************************************************/
244 time_t pull_dos_date2(const uint8_t *date_ptr, int zone_offset)
248 x = IVAL(date_ptr,0);
249 x2 = ((x&0xFFFF)<<16) | ((x&0xFFFF0000)>>16);
252 return pull_dos_date((void *)&x, zone_offset);
255 /*******************************************************************
256 create a unix GMT date from a dos date in 32 bit "unix like" format
257 these generally arrive as localtimes, with corresponding DST
258 ******************************************************************/
259 time_t pull_dos_date3(const uint8_t *date_ptr, int zone_offset)
261 time_t t = (time_t)IVAL(date_ptr,0);
269 /***************************************************************************
270 return a HTTP/1.0 time string
271 ***************************************************************************/
272 char *http_timestring(TALLOC_CTX *mem_ctx, time_t t)
276 struct tm *tm = localtime(&t);
279 return talloc_asprintf(mem_ctx,"%ld seconds since the Epoch",(long)t);
282 #ifndef HAVE_STRFTIME
283 buf = talloc_strdup(mem_ctx, asctime(tm));
284 if (buf[strlen(buf)-1] == '\n') {
285 buf[strlen(buf)-1] = 0;
288 strftime(tempTime, sizeof(tempTime)-1, "%a, %d %b %Y %H:%M:%S %Z", tm);
289 buf = talloc_strdup(mem_ctx, tempTime);
290 #endif /* !HAVE_STRFTIME */
295 /***************************************************************************
296 return a LDAP time string
297 ***************************************************************************/
298 char *ldap_timestring(TALLOC_CTX *mem_ctx, time_t t)
300 struct tm *tm = gmtime(&t);
306 /* formatted like: 20040408072012.0Z */
307 return talloc_asprintf(mem_ctx,
308 "%04u%02u%02u%02u%02u%02u.0Z",
309 tm->tm_year+1900, tm->tm_mon+1,
310 tm->tm_mday, tm->tm_hour, tm->tm_min,
314 /****************************************************************************
315 Return the date and time as a string
316 ****************************************************************************/
317 char *timestring(TALLOC_CTX *mem_ctx, time_t t)
325 return talloc_asprintf(mem_ctx,
326 "%ld seconds since the Epoch",
331 /* some versions of gcc complain about using %c. This is a bug
332 in the gcc warning, not a bug in this code. See a recent
333 strftime() manual page for details.
335 strftime(tempTime,sizeof(tempTime)-1,"%c %Z",tm);
336 TimeBuf = talloc_strdup(mem_ctx, tempTime);
338 TimeBuf = talloc_strdup(mem_ctx, asctime(tm));
345 return a talloced string representing a NTTIME for human consumption
347 const char *nt_time_string(TALLOC_CTX *mem_ctx, NTTIME nt)
349 time_t t = nt_time_to_unix(nt);
350 return timestring(mem_ctx, t);
355 put a NTTIME into a packet
357 void push_nttime(uint8_t *base, uint16_t offset, NTTIME t)
359 SBVAL(base, offset, t);
363 pull a NTTIME from a packet
365 NTTIME pull_nttime(uint8_t *base, uint16_t offset)
367 NTTIME ret = BVAL(base, offset);
372 parse a nttime as a large integer in a string and return a NTTIME
374 NTTIME nttime_from_string(const char *s)
376 return strtoull(s, NULL, 0);
380 return (tv1 - tv2) in microseconds
382 int64_t usec_time_diff(struct timeval *tv1, struct timeval *tv2)
384 int64_t sec_diff = tv1->tv_sec - tv2->tv_sec;
385 return (sec_diff * 1000000) + (int64_t)(tv1->tv_usec - tv2->tv_usec);
390 return a zero timeval
392 struct timeval timeval_zero(void)
401 return a timeval for the current time
403 struct timeval timeval_current(void)
411 return a timeval struct with the given elements
413 struct timeval timeval_set(uint32_t secs, uint32_t usecs)
423 return a timeval ofs microseconds after tv
425 struct timeval timeval_add(struct timeval *tv, uint32_t secs, uint32_t usecs)
427 struct timeval tv2 = *tv;
428 const uint_t million = 1000000;
430 tv2.tv_usec += usecs;
431 tv2.tv_sec += tv2.tv_usec / million;
432 tv2.tv_usec = tv2.tv_usec % million;
437 return the sum of two timeval structures
439 struct timeval timeval_sum(struct timeval *tv1, struct timeval *tv2)
441 return timeval_add(tv1, tv2->tv_sec, tv2->tv_usec);
445 return a timeval secs/usecs into the future
447 struct timeval timeval_current_ofs(uint32_t secs, uint32_t usecs)
449 struct timeval tv = timeval_current();
450 return timeval_add(&tv, secs, usecs);
454 compare two timeval structures.
455 Return 1 if tv2 > tv1
456 Return 0 if tv2 == tv1
457 Return -1 if tv2 < tv1
459 int timeval_compare(struct timeval *tv1, struct timeval *tv2)
461 if (tv2->tv_sec > tv1->tv_sec) return 1;
462 if (tv2->tv_sec < tv1->tv_sec) return -1;
463 if (tv2->tv_usec > tv1->tv_usec) return 1;
464 if (tv2->tv_usec < tv1->tv_usec) return -1;
469 return True if a timer is in the past
471 BOOL timeval_expired(struct timeval *tv)
473 struct timeval tv2 = timeval_current();
474 if (tv2.tv_sec > tv->tv_sec) return True;
475 if (tv2.tv_sec < tv->tv_sec) return False;
476 return (tv2.tv_usec >= tv->tv_usec);
480 return the number of seconds elapsed between two times
482 double timeval_elapsed2(struct timeval *tv1, struct timeval *tv2)
484 return (tv2->tv_sec - tv1->tv_sec) +
485 (tv2->tv_usec - tv1->tv_usec)*1.0e-6;
489 return the number of seconds elapsed since a given time
491 double timeval_elapsed(struct timeval *tv)
493 struct timeval tv2 = timeval_current();
494 return timeval_elapsed2(tv, &tv2);
498 return the lesser of two timevals
500 struct timeval timeval_min(struct timeval *tv1, struct timeval *tv2)
502 if (tv1->tv_sec < tv2->tv_sec) return *tv1;
503 if (tv1->tv_sec > tv2->tv_sec) return *tv2;
504 if (tv1->tv_usec < tv2->tv_usec) return *tv1;
509 return the greater of two timevals
511 struct timeval timeval_max(struct timeval *tv1, struct timeval *tv2)
513 if (tv1->tv_sec > tv2->tv_sec) return *tv1;
514 if (tv1->tv_sec < tv2->tv_sec) return *tv2;
515 if (tv1->tv_usec > tv2->tv_usec) return *tv1;
520 return the difference between two timevals as a timeval
521 if tv2 comes after tv1, then return a zero timeval
522 (this is *tv1 - *tv2)
524 struct timeval timeval_diff(struct timeval *tv1, struct timeval *tv2)
527 if (timeval_compare(tv1, tv2) >= 0) {
528 return timeval_zero();
530 t.tv_sec = tv1->tv_sec - tv2->tv_sec;
531 if (tv2->tv_usec > tv1->tv_usec) {
533 t.tv_usec = 1000000 - (tv2->tv_usec - tv1->tv_usec);
535 t.tv_usec = tv1->tv_usec - tv2->tv_usec;