diff options
Diffstat (limited to 'libc/misc/time/mktime.c')
| -rw-r--r-- | libc/misc/time/mktime.c | 41 |
1 files changed, 39 insertions, 2 deletions
diff --git a/libc/misc/time/mktime.c b/libc/misc/time/mktime.c index d6ee2ed42..c767fb402 100644 --- a/libc/misc/time/mktime.c +++ b/libc/misc/time/mktime.c @@ -108,9 +108,46 @@ const struct tm *tp; } -static time_t localtime_offset; +/* This structure contains all the information about a + timezone given in the POSIX standard TZ envariable. */ +typedef struct + { + const char *name; + + /* When to change. */ + enum { J0, J1, M } type; /* Interpretation of: */ + unsigned short int m, n, d; /* Month, week, day. */ + unsigned int secs; /* Time of day. */ + + long int offset; /* Seconds east of GMT (west if < 0). */ + + /* We cache the computed time of change for a + given year so we don't have to recompute it. */ + time_t change; /* When to change to this zone. */ + int computed_for; /* Year above is computed for. */ + } tz_rule; + +/* tz_rules[0] is standard, tz_rules[1] is daylight. */ +static tz_rule tz_rules[2]; + +/* Warning -- this function is a stub andd always does UTC + * no matter what it is given */ +void tzset (void) +{ + tz_rules[0].name = tz_rules[1].name = "UTC"; + tz_rules[0].type = tz_rules[1].type = J0; + tz_rules[0].m = tz_rules[0].n = tz_rules[0].d = 0; + tz_rules[1].m = tz_rules[1].n = tz_rules[1].d = 0; + tz_rules[0].secs = tz_rules[1].secs = 0; + tz_rules[0].offset = tz_rules[1].offset = 0L; + tz_rules[0].change = tz_rules[1].change = (time_t) -1; + tz_rules[0].computed_for = tz_rules[1].computed_for = 0; +} + +static time_t localtime_offset; + /* Convert *TP to a time_t value. */ time_t mktime(tp) struct tm *tp; @@ -119,7 +156,7 @@ struct tm *tp; /* POSIX.1 8.1.1 requires that whenever mktime() is called, the time zone names contained in the external variable `tzname' shall be set as if the tzset() function had been called. */ - __tzset(); + tzset(); #endif return __mktime_internal(tp, localtime_r, &localtime_offset); |