1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
#include <u.h>
#include <stdlib.h> /* setenv etc. */
#define NOPLAN9DEFINES
#include <libc.h>
#include <time.h>
#define _HAVETIMEGM 1
#define _HAVETMZONE 1
#define _HAVETMGMTOFF 1
#if defined(__linux__)
# undef _HAVETMZONE
#elif defined(__sun__)
# undef _HAVETIMEGM
# undef _HAVETMZONE
# undef _HAVETMGMTOFF
#endif
static Tm bigtm;
static void
tm2Tm(struct tm *tm, Tm *bigtm)
{
char *s;
memset(bigtm, 0, sizeof *bigtm);
bigtm->sec = tm->tm_sec;
bigtm->min = tm->tm_min;
bigtm->hour = tm->tm_hour;
bigtm->mday = tm->tm_mday;
bigtm->mon = tm->tm_mon;
bigtm->year = tm->tm_year;
bigtm->wday = tm->tm_wday;
strftime(bigtm->zone, sizeof bigtm->zone, "%Z", tm);
#ifdef _HAVETMGMTOFF
bigtm->tzoff = tm->tm_gmtoff;
#endif
if(bigtm->zone[0] == 0){
s = getenv("TIMEZONE");
if(s){
strecpy(bigtm->zone, bigtm->zone+4, s);
free(s);
}
}
}
static void
Tm2tm(Tm *bigtm, struct tm *tm)
{
memset(tm, 0, sizeof *tm);
tm->tm_sec = bigtm->sec;
tm->tm_min = bigtm->min;
tm->tm_hour = bigtm->hour;
tm->tm_mday = bigtm->mday;
tm->tm_mon = bigtm->mon;
tm->tm_year = bigtm->year;
tm->tm_wday = bigtm->wday;
#ifdef _HAVETMZONE
tm->tm_zone = bigtm->zone;
#endif
#ifdef _HAVETMGMTOFF
tm->tm_gmtoff = bigtm->tzoff;
#endif
}
Tm*
p9gmtime(long x)
{
time_t t;
struct tm tm;
t = (time_t)x;
tm = *gmtime(&t);
tm2Tm(&tm, &bigtm);
return &bigtm;
}
Tm*
p9localtime(long x)
{
time_t t;
struct tm tm;
t = (time_t)x;
tm = *localtime(&t);
tm2Tm(&tm, &bigtm);
return &bigtm;
}
#if !defined(_HAVETIMEGM)
static time_t
timegm(struct tm *tm)
{
time_t ret;
char *tz;
char *s;
tz = getenv("TZ");
putenv("TZ=");
tzset();
ret = mktime(tm);
if(tz){
s = smprint("TZ=%s", tz);
if(s)
putenv(s);
}
return ret;
}
#endif
long
p9tm2sec(Tm *bigtm)
{
struct tm tm;
Tm2tm(bigtm, &tm);
if(strcmp(bigtm->zone, "GMT") == 0 || strcmp(bigtm->zone, "UCT") == 0)
return timegm(&tm);
return mktime(&tm); /* local time zone */
}
|