diff options
Diffstat (limited to 'source3/lib/time.c')
| -rw-r--r-- | source3/lib/time.c | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/source3/lib/time.c b/source3/lib/time.c index b302726a95..f0f62ca841 100644 --- a/source3/lib/time.c +++ b/source3/lib/time.c @@ -304,6 +304,50 @@ time_t nt_time_to_unix(NTTIME *nt) return(ret); } +/**************************************************************************** +convert a NTTIME structure to a time_t +It's originally in "100ns units" + +this is an absolute version of the one above. +By absolute I mean, it doesn't adjust from 1/1/1601 to 1/1/1970 +if the NTTIME was 5 seconds, the time_t is 5 seconds. JFM +****************************************************************************/ +time_t nt_time_to_unix_abs(NTTIME *nt) +{ + double d; + time_t ret; + /* The next two lines are a fix needed for the + broken SCO compiler. JRA. */ + time_t l_time_min = TIME_T_MIN; + time_t l_time_max = TIME_T_MAX; + + if (nt->high == 0) + return(0); + + if (nt->high==0x80000000 && nt->low==0) + return -1; + + /* reverse the time */ + /* it's a negative value, turn it to positive */ + nt->high=~nt->high; + nt->low=~nt->low; + + d = ((double)nt->high)*4.0*(double)(1<<30); + d += (nt->low&0xFFF00000); + d *= 1.0e-7; + + if (!(l_time_min <= d && d <= l_time_max)) + return(0); + + ret = (time_t)(d+0.5); + + /* this takes us from kludge-GMT to real GMT */ + ret -= get_serverzone(); + ret += LocTimeDiff(ret); + + return(ret); +} + /**************************************************************************** @@ -355,6 +399,50 @@ void unix_to_nt_time(NTTIME *nt, time_t t) nt->low = (uint32)(d - ((double)nt->high)*4.0*(double)(1<<30)); } +/**************************************************************************** +convert a time_t to a NTTIME structure + +this is an absolute version of the one above. +By absolute I mean, it doesn't adjust from 1/1/1970 to 1/1/1601 +if the nttime_t was 5 seconds, the NTTIME is 5 seconds. JFM +****************************************************************************/ +void unix_to_nt_time_abs(NTTIME *nt, time_t t) +{ + double d; + + if (t==0) { + nt->low = 0; + nt->high = 0; + return; + } + + if (t == TIME_T_MAX) { + nt->low = 0xffffffff; + nt->high = 0x7fffffff; + return; + } + + if (t == -1) { + /* that's what NT uses for infinite */ + nt->low = 0x0; + nt->high = 0x80000000; + return; + } + + /* this converts GMT to kludge-GMT */ + t -= LocTimeDiff(t) - get_serverzone(); + + d = (double)(t); + d *= 1.0e7; + + nt->high = (uint32)(d * (1.0/(4.0*(double)(1<<30)))); + nt->low = (uint32)(d - ((double)nt->high)*4.0*(double)(1<<30)); + + /* convert to a negative value */ + nt->high=~nt->high; + nt->low=~nt->low; +} + /**************************************************************************** take an NTTIME structure, containing high / low time. convert to unix time. |