aboutsummaryrefslogtreecommitdiffstats
path: root/calendar/timeutil.c
blob: c19b394be9a40b7b26c0c85417356d5fcfc4b6ea (plain) (blame)
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
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
/* Miscellaneous time-related utilities
 *
 * Copyright (C) 1998 The Free Software Foundation
 *
 * Authors: Federico Mena <federico@nuclecu.unam.mx>
 *          Miguel de Icaza <miguel@nuclecu.unam.mx>
 */

#include <libgnome/libgnome.h>
#include "timeutil.h"

#define digit_at(x,y) (x [y] - '0')
    
time_t
time_from_isodate (char *str)
{
    struct tm my_tm;
    time_t t;

    my_tm.tm_year = (digit_at (str, 0) * 1000 + digit_at (str, 1) * 100 +
        digit_at (str, 2) * 10 + digit_at (str, 3)) - 1900;

    my_tm.tm_mon  = digit_at (str, 4) * 10 + digit_at (str, 5) - 1;
    my_tm.tm_mday = digit_at (str, 6) * 10 + digit_at (str, 7);
    my_tm.tm_hour = digit_at (str, 9) * 10 + digit_at (str, 10);
    my_tm.tm_min  = digit_at (str, 11) * 10 + digit_at (str, 12);
    my_tm.tm_sec  = digit_at (str, 13) * 10 + digit_at (str, 14);
    my_tm.tm_isdst = -1;
    
    t = mktime (&my_tm);
    return t;
}

void
print_time_t (time_t t)
{
    struct tm *tm = localtime (&t);
    
    printf ("TIEMPO: %d/%d/%d %d:%d:%d\n",
        tm->tm_mon+1, tm->tm_mday, tm->tm_year,
        tm->tm_hour, tm->tm_min, tm->tm_sec);
}

int
get_time_t_hour (time_t t)
{
    struct tm *tm;

    tm = localtime (&t);
    return tm->tm_hour;
}

char *
isodate_from_time_t (time_t t)
{
    struct tm *tm;
    static char isotime [40];

    tm = localtime (&t);
    strftime (isotime, sizeof (isotime)-1, "%Y%m%dT%H%M%sZ", tm);
    return isotime;
}

time_t
time_from_start_duration (time_t start, char *duration)
{
    printf ("Not yet implemented\n");
    return 0;
}

char *
format_simple_hour (int hour, int use_am_pm)
{
    static char buf[256];

    /* I don't know whether this is the best way to internationalize it.
     * Does any language use different conventions? - Federico
     */

    if (use_am_pm)
        sprintf (buf, "%d%s",
             (hour == 0) ? 12 : (hour > 12) ? (hour - 12) : hour,
             (hour < 12) ? _("am") : _("pm"));
    else
        sprintf (buf, "%02d%s", hour, _("h"));

    return buf;

}

time_t
time_add_day (time_t time, int days)
{
    struct tm *tm = localtime (&time);
    time_t new_time;

    tm->tm_mday += days;
    if ((new_time = mktime (tm)) == -1){
        g_warning ("mktime could not handling adding a day with\n");
        print_time_t (time);
        return time;
    }
    return new_time;
}

time_t
time_add_year (time_t time, int years)
{
    struct tm *tm = localtime (&time);
    time_t new_time;
    
    tm->tm_year += years;
    if ((new_time = mktime (tm)) == -1){
        g_warning ("mktime could not handling adding a year with\n");
        print_time_t (time);
        return time;
    }
    return new_time;
}

time_t
time_day_hour (time_t t, int hour)
{
    struct tm tm;
    time_t retval;
    
    tm = *localtime (&t);
    tm.tm_hour = hour;
    tm.tm_min  = 0;
    tm.tm_sec  = 0;

    retval = mktime (&tm);
    return retval;
}


time_t
time_start_of_day (time_t t)
{
    struct tm tm;
    time_t retval;
    
    tm = *localtime (&t);
    tm.tm_hour = 0;
    tm.tm_min  = 0;
    tm.tm_sec  = 0;

    retval = mktime (&tm);
    return retval;
}

time_t
time_end_of_day (time_t t)
{
    struct tm tm;
    time_t retval;
    
    tm = *localtime (&t);
    tm.tm_hour = 0;
    tm.tm_min  = 0;
    tm.tm_sec  = 0;
    tm.tm_mday++;
    
    retval = mktime (&tm);
    return retval;
}