Changeset 2e3a857 for lib/misc.c
- Timestamp:
- 2010-04-08T00:27:42Z (14 years ago)
- Branches:
- master
- Children:
- 08579a1
- Parents:
- 91cec2f
- File:
-
- 1 edited
Legend:
- Unmodified
- Added
- Removed
-
lib/misc.c
r91cec2f r2e3a857 77 77 78 78 return mktime(&tm); 79 } 80 81 time_t mktime_utc( struct tm *tp ) 82 { 83 struct tm utc; 84 time_t res, tres; 85 86 tp->tm_isdst = -1; 87 res = mktime( tp ); 88 /* Problem is, mktime() just gave us the GMT timestamp for the 89 given local time... While the given time WAS NOT local. So 90 we should fix this now. 91 92 Now I could choose between messing with environment variables 93 (kludgy) or using timegm() (not portable)... Or doing the 94 following, which I actually prefer... 95 96 tzset() may also work but in other places I actually want to 97 use local time. 98 99 FFFFFFFFFFFFFFFFFFFFFUUUUUUUUUUUUUUUUUUUU!! */ 100 gmtime_r( &res, &utc ); 101 utc.tm_isdst = -1; 102 if( utc.tm_hour == tp->tm_hour && utc.tm_min == tp->tm_min ) 103 /* Sweet! We're in UTC right now... */ 104 return res; 105 106 tres = mktime( &utc ); 107 res += res - tres; 108 109 /* Yes, this is a hack. And it will go wrong around DST changes. 110 BUT this is more likely to be threadsafe than messing with 111 environment variables, and possibly more portable... */ 112 113 return res; 79 114 } 80 115
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