← Back to branch summary

~ubuntu-branches/ubuntu/hardy/9base/hardy

« back to all changes in this revision

Viewing changes to lib9/date.c

  • Committer: Bazaar Package Importer
  • Author(s): Daniel Baumann
  • Date: 2006-01-25 15:33:00 UTC
  • Revision ID: james.westby@ubuntu.com-20060125153300-6hh4p9wx8iqqply5
Tags: upstream-2
Import upstream version 2

Show diffs side-by-side

added added

removed removed

Lines of Context:
lib9/date.c
 
1
#include <u.h>
 
2
#include <stdlib.h> /* setenv etc. */
 
3
#define NOPLAN9DEFINES
 
4
#include <libc.h>
 
5
#include <time.h>
 
6
 
 
7
#define _HAVETIMEGM 1
 
8
#define _HAVETMZONE 1
 
9
#define _HAVETMTZOFF 1
 
10
 
 
11
#if defined(__linux__)
 
12
#       undef _HAVETMZONE
 
13
#       undef _HAVETMTZOFF
 
14
 
 
15
#elif defined(__sun__)
 
16
#       undef _HAVETIMEGM
 
17
#       undef _HAVETMZONE
 
18
#       undef _HAVETMTZOFF
 
19
 
 
20
#endif
 
21
 
 
22
static Tm bigtm;
 
23
 
 
24
static void
 
25
tm2Tm(struct tm *tm, Tm *bigtm)
 
26
{
 
27
        char *s;
 
28
 
 
29
        memset(bigtm, 0, sizeof *bigtm);
 
30
        bigtm->sec = tm->tm_sec;
 
31
        bigtm->min = tm->tm_min;
 
32
        bigtm->hour = tm->tm_hour;
 
33
        bigtm->mday = tm->tm_mday;
 
34
        bigtm->mon = tm->tm_mon;
 
35
        bigtm->year = tm->tm_year;
 
36
        bigtm->wday = tm->tm_wday;
 
37
        strftime(bigtm->zone, sizeof bigtm->zone, "%Z", tm);
 
38
#ifdef _HAVETZOFF
 
39
        bigtm->tzoff = tm->tm_gmtoff;
 
40
#endif
 
41
        
 
42
        if(bigtm->zone[0] == 0){
 
43
                s = getenv("TIMEZONE");
 
44
                if(s){
 
45
                        strecpy(bigtm->zone, bigtm->zone+4, s);
 
46
                        free(s);
 
47
                }
 
48
        }
 
49
}
 
50
 
 
51
static void
 
52
Tm2tm(Tm *bigtm, struct tm *tm)
 
53
{
 
54
        memset(tm, 0, sizeof *tm);
 
55
        tm->tm_sec = bigtm->sec;
 
56
        tm->tm_min = bigtm->min;
 
57
        tm->tm_hour = bigtm->hour;
 
58
        tm->tm_mday = bigtm->mday;
 
59
        tm->tm_mon = bigtm->mon;
 
60
        tm->tm_year = bigtm->year;
 
61
        tm->tm_wday = bigtm->wday;
 
62
#ifdef _HAVETMZONE
 
63
        tm->tm_zone = bigtm->zone;
 
64
#endif
 
65
#ifdef _HAVETZOFF
 
66
        tm->tm_gmtoff = bigtm->tzoff;
 
67
#endif
 
68
}
 
69
 
 
70
Tm*
 
71
p9gmtime(long x)
 
72
{
 
73
        time_t t;
 
74
        struct tm tm;
 
75
 
 
76
        t = (time_t)x;
 
77
        tm = *gmtime(&t);
 
78
        tm2Tm(&tm, &bigtm);
 
79
        return &bigtm;
 
80
}
 
81
 
 
82
Tm*
 
83
p9localtime(long x)
 
84
{
 
85
        time_t t;
 
86
        struct tm tm;
 
87
 
 
88
        t = (time_t)x;
 
89
        tm = *localtime(&t);
 
90
        tm2Tm(&tm, &bigtm);
 
91
        return &bigtm;
 
92
}
 
93
 
 
94
#if !defined(_HAVETIMEGM)
 
95
static time_t
 
96
timegm(struct tm *tm)
 
97
{
 
98
        time_t ret;
 
99
        char *tz;
 
100
        char *s;
 
101
 
 
102
        tz = getenv("TZ");
 
103
        putenv("TZ=");
 
104
        tzset();
 
105
        ret = mktime(tm);
 
106
        if(tz){
 
107
                s = smprint("TZ=%s", tz);
 
108
                if(s)
 
109
                        putenv(s);
 
110
        }
 
111
        return ret;
 
112
}
 
113
#endif
 
114
 
 
115
long
 
116
p9tm2sec(Tm *bigtm)
 
117
{
 
118
        struct tm tm;
 
119
 
 
120
        Tm2tm(bigtm, &tm);
 
121
        if(strcmp(bigtm->zone, "GMT") == 0 || strcmp(bigtm->zone, "UCT") == 0)
 
122
                return timegm(&tm);
 
123
        return mktime(&tm);     /* local time zone */
 
124
}
 
125