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author | Jelmer Vernooij <jelmer@samba.org> | 2006-02-23 15:52:24 +0000 |
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committer | Gerald (Jerry) Carter <jerry@samba.org> | 2007-10-10 13:52:05 -0500 |
commit | dfc517b05395d925a4d7b1ce9633a849f9468e70 (patch) | |
tree | a81c020c89022980e6fbb68116648da217fbb0fc /source4/lib/util/time.c | |
parent | 80c8a522861068e7b0974986936f65052dd6f70f (diff) | |
download | samba-dfc517b05395d925a4d7b1ce9633a849f9468e70.tar.gz samba-dfc517b05395d925a4d7b1ce9633a849f9468e70.tar.bz2 samba-dfc517b05395d925a4d7b1ce9633a849f9468e70.zip |
r13658: More moving around of files:
- Collect the generic utility functions into a lib/util/ (a la GLib is
for the GNOME folks)
- Remove even more files from include/
(This used to be commit ba62880f5b05c2a505dc7f54676b231197a7e707)
Diffstat (limited to 'source4/lib/util/time.c')
-rw-r--r-- | source4/lib/util/time.c | 596 |
1 files changed, 596 insertions, 0 deletions
diff --git a/source4/lib/util/time.c b/source4/lib/util/time.c new file mode 100644 index 0000000000..7721a2c456 --- /dev/null +++ b/source4/lib/util/time.c @@ -0,0 +1,596 @@ +/* + Unix SMB/CIFS implementation. + time handling functions + + Copyright (C) Andrew Tridgell 1992-2004 + Copyright (C) Stefan (metze) Metzmacher 2002 + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +#include "includes.h" +#include "system/time.h" + +#ifndef TIME_T_MIN +/* we use 0 here, because (time_t)-1 means error */ +#define TIME_T_MIN 0 +#endif + +/* + * we use the INT32_MAX here as on 64 bit systems, + * gmtime() fails with INT64_MAX + */ + +#ifndef TIME_T_MAX +#define TIME_T_MAX MIN(INT32_MAX,_TYPE_MAXIMUM(time_t)) +#endif + +/******************************************************************* + External access to time_t_min and time_t_max. +********************************************************************/ +time_t get_time_t_max(void) +{ + return TIME_T_MAX; +} + +/******************************************************************* +a gettimeofday wrapper +********************************************************************/ +void GetTimeOfDay(struct timeval *tval) +{ +#ifdef HAVE_GETTIMEOFDAY_TZ + gettimeofday(tval,NULL); +#else + gettimeofday(tval); +#endif +} + + +#define TIME_FIXUP_CONSTANT 11644473600LL + +/**************************************************************************** +interpret an 8 byte "filetime" structure to a time_t +It's originally in "100ns units since jan 1st 1601" +****************************************************************************/ +time_t nt_time_to_unix(NTTIME nt) +{ + if (nt == 0) { + return 0; + } + if (nt == -1LL) { + return (time_t)-1; + } + nt += 1000*1000*10/2; + nt /= 1000*1000*10; + nt -= TIME_FIXUP_CONSTANT; + + if (TIME_T_MIN > nt || nt > TIME_T_MAX) { + return 0; + } + + return (time_t)nt; +} + + +/**************************************************************************** +put a 8 byte filetime from a time_t +This takes GMT as input +****************************************************************************/ +void unix_to_nt_time(NTTIME *nt, time_t t) +{ + uint64_t t2; + + if (t == (time_t)-1) { + *nt = (NTTIME)-1LL; + return; + } + if (t == 0) { + *nt = 0; + return; + } + + t2 = t; + t2 += TIME_FIXUP_CONSTANT; + t2 *= 1000*1000*10; + + *nt = t2; +} + + +/**************************************************************************** +check if it's a null unix time +****************************************************************************/ +BOOL null_time(time_t t) +{ + return t == 0 || + t == (time_t)0xFFFFFFFF || + t == (time_t)-1; +} + + +/**************************************************************************** +check if it's a null NTTIME +****************************************************************************/ +BOOL null_nttime(NTTIME t) +{ + return t == 0 || t == (NTTIME)-1; +} + +/******************************************************************* + create a 16 bit dos packed date +********************************************************************/ +static uint16_t make_dos_date1(struct tm *t) +{ + uint16_t ret=0; + ret = (((uint_t)(t->tm_mon+1)) >> 3) | ((t->tm_year-80) << 1); + ret = ((ret&0xFF)<<8) | (t->tm_mday | (((t->tm_mon+1) & 0x7) << 5)); + return ret; +} + +/******************************************************************* + create a 16 bit dos packed time +********************************************************************/ +static uint16_t make_dos_time1(struct tm *t) +{ + uint16_t ret=0; + ret = ((((uint_t)t->tm_min >> 3)&0x7) | (((uint_t)t->tm_hour) << 3)); + ret = ((ret&0xFF)<<8) | ((t->tm_sec/2) | ((t->tm_min & 0x7) << 5)); + return ret; +} + +/******************************************************************* + create a 32 bit dos packed date/time from some parameters + This takes a GMT time and returns a packed localtime structure +********************************************************************/ +static uint32_t make_dos_date(time_t unixdate, int zone_offset) +{ + struct tm *t; + uint32_t ret=0; + + if (unixdate == 0) { + return 0; + } + + unixdate -= zone_offset; + + t = gmtime(&unixdate); + if (!t) { + return 0xFFFFFFFF; + } + + ret = make_dos_date1(t); + ret = ((ret&0xFFFF)<<16) | make_dos_time1(t); + + return ret; +} + +/******************************************************************* +put a dos date into a buffer (time/date format) +This takes GMT time and puts local time in the buffer +********************************************************************/ +void push_dos_date(uint8_t *buf, int offset, time_t unixdate, int zone_offset) +{ + uint32_t x = make_dos_date(unixdate, zone_offset); + SIVAL(buf,offset,x); +} + +/******************************************************************* +put a dos date into a buffer (date/time format) +This takes GMT time and puts local time in the buffer +********************************************************************/ +void push_dos_date2(uint8_t *buf,int offset,time_t unixdate, int zone_offset) +{ + uint32_t x; + x = make_dos_date(unixdate, zone_offset); + x = ((x&0xFFFF)<<16) | ((x&0xFFFF0000)>>16); + SIVAL(buf,offset,x); +} + +/******************************************************************* +put a dos 32 bit "unix like" date into a buffer. This routine takes +GMT and converts it to LOCAL time before putting it (most SMBs assume +localtime for this sort of date) +********************************************************************/ +void push_dos_date3(uint8_t *buf,int offset,time_t unixdate, int zone_offset) +{ + if (!null_time(unixdate)) { + unixdate -= zone_offset; + } + SIVAL(buf,offset,unixdate); +} + +/******************************************************************* + interpret a 32 bit dos packed date/time to some parameters +********************************************************************/ +static void interpret_dos_date(uint32_t date,int *year,int *month,int *day,int *hour,int *minute,int *second) +{ + uint32_t p0,p1,p2,p3; + + p0=date&0xFF; p1=((date&0xFF00)>>8)&0xFF; + p2=((date&0xFF0000)>>16)&0xFF; p3=((date&0xFF000000)>>24)&0xFF; + + *second = 2*(p0 & 0x1F); + *minute = ((p0>>5)&0xFF) + ((p1&0x7)<<3); + *hour = (p1>>3)&0xFF; + *day = (p2&0x1F); + *month = ((p2>>5)&0xFF) + ((p3&0x1)<<3) - 1; + *year = ((p3>>1)&0xFF) + 80; +} + +/******************************************************************* + create a unix date (int GMT) from a dos date (which is actually in + localtime) +********************************************************************/ +time_t pull_dos_date(const uint8_t *date_ptr, int zone_offset) +{ + uint32_t dos_date=0; + struct tm t; + time_t ret; + + dos_date = IVAL(date_ptr,0); + + if (dos_date == 0) return (time_t)0; + + interpret_dos_date(dos_date,&t.tm_year,&t.tm_mon, + &t.tm_mday,&t.tm_hour,&t.tm_min,&t.tm_sec); + t.tm_isdst = -1; + + ret = timegm(&t); + + ret += zone_offset; + + return ret; +} + +/******************************************************************* +like make_unix_date() but the words are reversed +********************************************************************/ +time_t pull_dos_date2(const uint8_t *date_ptr, int zone_offset) +{ + uint32_t x,x2; + + x = IVAL(date_ptr,0); + x2 = ((x&0xFFFF)<<16) | ((x&0xFFFF0000)>>16); + SIVAL(&x,0,x2); + + return pull_dos_date((void *)&x, zone_offset); +} + +/******************************************************************* + create a unix GMT date from a dos date in 32 bit "unix like" format + these generally arrive as localtimes, with corresponding DST + ******************************************************************/ +time_t pull_dos_date3(const uint8_t *date_ptr, int zone_offset) +{ + time_t t = (time_t)IVAL(date_ptr,0); + if (!null_time(t)) { + t += zone_offset; + } + return t; +} + + +/*************************************************************************** +return a HTTP/1.0 time string + ***************************************************************************/ +char *http_timestring(TALLOC_CTX *mem_ctx, time_t t) +{ + char *buf; + char tempTime[60]; + struct tm *tm = localtime(&t); + + if (!tm) { + return talloc_asprintf(mem_ctx,"%ld seconds since the Epoch",(long)t); + } + +#ifndef HAVE_STRFTIME + buf = talloc_strdup(mem_ctx, asctime(tm)); + if (buf[strlen(buf)-1] == '\n') { + buf[strlen(buf)-1] = 0; + } +#else + strftime(tempTime, sizeof(tempTime)-1, "%a, %d %b %Y %H:%M:%S %Z", tm); + buf = talloc_strdup(mem_ctx, tempTime); +#endif /* !HAVE_STRFTIME */ + + return buf; +} + +/**************************************************************************** + Return the date and time as a string +****************************************************************************/ +char *timestring(TALLOC_CTX *mem_ctx, time_t t) +{ + char *TimeBuf; + char tempTime[80]; + struct tm *tm; + + tm = localtime(&t); + if (!tm) { + return talloc_asprintf(mem_ctx, + "%ld seconds since the Epoch", + (long)t); + } + +#ifdef HAVE_STRFTIME + /* some versions of gcc complain about using %c. This is a bug + in the gcc warning, not a bug in this code. See a recent + strftime() manual page for details. + */ + strftime(tempTime,sizeof(tempTime)-1,"%c %Z",tm); + TimeBuf = talloc_strdup(mem_ctx, tempTime); +#else + TimeBuf = talloc_strdup(mem_ctx, asctime(tm)); +#endif + + return TimeBuf; +} + +/* + return a talloced string representing a NTTIME for human consumption +*/ +const char *nt_time_string(TALLOC_CTX *mem_ctx, NTTIME nt) +{ + time_t t; + if (nt == 0) { + return "NTTIME(0)"; + } + t = nt_time_to_unix(nt); + return timestring(mem_ctx, t); +} + + +/* + put a NTTIME into a packet +*/ +void push_nttime(uint8_t *base, uint16_t offset, NTTIME t) +{ + SBVAL(base, offset, t); +} + +/* + pull a NTTIME from a packet +*/ +NTTIME pull_nttime(uint8_t *base, uint16_t offset) +{ + NTTIME ret = BVAL(base, offset); + return ret; +} + +/* + parse a nttime as a large integer in a string and return a NTTIME +*/ +NTTIME nttime_from_string(const char *s) +{ + return strtoull(s, NULL, 0); +} + +/* + return (tv1 - tv2) in microseconds +*/ +int64_t usec_time_diff(struct timeval *tv1, struct timeval *tv2) +{ + int64_t sec_diff = tv1->tv_sec - tv2->tv_sec; + return (sec_diff * 1000000) + (int64_t)(tv1->tv_usec - tv2->tv_usec); +} + + +/* + return a zero timeval +*/ +struct timeval timeval_zero(void) +{ + struct timeval tv; + tv.tv_sec = 0; + tv.tv_usec = 0; + return tv; +} + +/* + return True if a timeval is zero +*/ +BOOL timeval_is_zero(const struct timeval *tv) +{ + return tv->tv_sec == 0 && tv->tv_usec == 0; +} + +/* + return a timeval for the current time +*/ +struct timeval timeval_current(void) +{ + struct timeval tv; + GetTimeOfDay(&tv); + return tv; +} + +/* + return a timeval struct with the given elements +*/ +struct timeval timeval_set(uint32_t secs, uint32_t usecs) +{ + struct timeval tv; + tv.tv_sec = secs; + tv.tv_usec = usecs; + return tv; +} + + +/* + return a timeval ofs microseconds after tv +*/ +struct timeval timeval_add(const struct timeval *tv, + uint32_t secs, uint32_t usecs) +{ + struct timeval tv2 = *tv; + const uint_t million = 1000000; + tv2.tv_sec += secs; + tv2.tv_usec += usecs; + tv2.tv_sec += tv2.tv_usec / million; + tv2.tv_usec = tv2.tv_usec % million; + return tv2; +} + +/* + return the sum of two timeval structures +*/ +struct timeval timeval_sum(const struct timeval *tv1, + const struct timeval *tv2) +{ + return timeval_add(tv1, tv2->tv_sec, tv2->tv_usec); +} + +/* + return a timeval secs/usecs into the future +*/ +struct timeval timeval_current_ofs(uint32_t secs, uint32_t usecs) +{ + struct timeval tv = timeval_current(); + return timeval_add(&tv, secs, usecs); +} + +/* + compare two timeval structures. + Return -1 if tv1 < tv2 + Return 0 if tv1 == tv2 + Return 1 if tv1 > tv2 +*/ +int timeval_compare(const struct timeval *tv1, const struct timeval *tv2) +{ + if (tv1->tv_sec > tv2->tv_sec) return 1; + if (tv1->tv_sec < tv2->tv_sec) return -1; + if (tv1->tv_usec > tv2->tv_usec) return 1; + if (tv1->tv_usec < tv2->tv_usec) return -1; + return 0; +} + +/* + return True if a timer is in the past +*/ +BOOL timeval_expired(const struct timeval *tv) +{ + struct timeval tv2 = timeval_current(); + if (tv2.tv_sec > tv->tv_sec) return True; + if (tv2.tv_sec < tv->tv_sec) return False; + return (tv2.tv_usec >= tv->tv_usec); +} + +/* + return the number of seconds elapsed between two times +*/ +double timeval_elapsed2(const struct timeval *tv1, const struct timeval *tv2) +{ + return (tv2->tv_sec - tv1->tv_sec) + + (tv2->tv_usec - tv1->tv_usec)*1.0e-6; +} + +/* + return the number of seconds elapsed since a given time +*/ +double timeval_elapsed(const struct timeval *tv) +{ + struct timeval tv2 = timeval_current(); + return timeval_elapsed2(tv, &tv2); +} + +/* + return the lesser of two timevals +*/ +struct timeval timeval_min(const struct timeval *tv1, + const struct timeval *tv2) +{ + if (tv1->tv_sec < tv2->tv_sec) return *tv1; + if (tv1->tv_sec > tv2->tv_sec) return *tv2; + if (tv1->tv_usec < tv2->tv_usec) return *tv1; + return *tv2; +} + +/* + return the greater of two timevals +*/ +struct timeval timeval_max(const struct timeval *tv1, + const struct timeval *tv2) +{ + if (tv1->tv_sec > tv2->tv_sec) return *tv1; + if (tv1->tv_sec < tv2->tv_sec) return *tv2; + if (tv1->tv_usec > tv2->tv_usec) return *tv1; + return *tv2; +} + +/* + return the difference between two timevals as a timeval + if tv1 comes after tv2, then return a zero timeval + (this is *tv2 - *tv1) +*/ +struct timeval timeval_until(const struct timeval *tv1, + const struct timeval *tv2) +{ + struct timeval t; + if (timeval_compare(tv1, tv2) >= 0) { + return timeval_zero(); + } + t.tv_sec = tv2->tv_sec - tv1->tv_sec; + if (tv1->tv_usec > tv2->tv_usec) { + t.tv_sec--; + t.tv_usec = 1000000 - (tv1->tv_usec - tv2->tv_usec); + } else { + t.tv_usec = tv2->tv_usec - tv1->tv_usec; + } + return t; +} + + +/* + convert a timeval to a NTTIME +*/ +NTTIME timeval_to_nttime(const struct timeval *tv) +{ + return 10*(tv->tv_usec + + ((TIME_FIXUP_CONSTANT + (uint64_t)tv->tv_sec) * 1000000)); +} + +/******************************************************************* +yield the difference between *A and *B, in seconds, ignoring leap seconds +********************************************************************/ +static int tm_diff(struct tm *a, struct tm *b) +{ + int ay = a->tm_year + (1900 - 1); + int by = b->tm_year + (1900 - 1); + int intervening_leap_days = + (ay/4 - by/4) - (ay/100 - by/100) + (ay/400 - by/400); + int years = ay - by; + int days = 365*years + intervening_leap_days + (a->tm_yday - b->tm_yday); + int hours = 24*days + (a->tm_hour - b->tm_hour); + int minutes = 60*hours + (a->tm_min - b->tm_min); + int seconds = 60*minutes + (a->tm_sec - b->tm_sec); + + return seconds; +} + +/******************************************************************* + return the UTC offset in seconds west of UTC, or 0 if it cannot be determined + ******************************************************************/ +int get_time_zone(time_t t) +{ + struct tm *tm = gmtime(&t); + struct tm tm_utc; + if (!tm) + return 0; + tm_utc = *tm; + tm = localtime(&t); + if (!tm) + return 0; + return tm_diff(&tm_utc,tm); +} |