citadel
About: Citadel is an advanced messaging and collaboration system for groupware and BBS applications (preferred OS: Linux).
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genstamp.c
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1/*
2 * Function to generate RFC822-compliant textual time/date stamp
3 */
4
5#include "sysdep.h"
6#include <stdio.h>
7#include <stdlib.h>
8#include <ctype.h>
9#include <string.h>
10#include <time.h>
11#include "genstamp.h"
12
13static char *months[] = {
14 "Jan", "Feb", "Mar", "Apr", "May", "Jun",
15 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
16};
17
18static char *weekdays[] = {
19 "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
20};
21
22/*
23 * Supplied with a unix timestamp, generate an RFC822-compliant textual
24 * time and date stamp.
25 */
26long datestring(char *buf, size_t n, time_t xtime, int which_format) {
27 struct tm t;
28
29 long offset;
30 char offsign;
31
32 localtime_r(&xtime, &t);
33
34 /* Convert "seconds west of GMT" to "hours/minutes offset" */
35#ifdef HAVE_STRUCT_TM_TM_GMTOFF
36 offset = t.tm_gmtoff;
37#else
38 offset = timezone;
39#endif
40 if (offset > 0) {
41 offsign = '+';
42 }
43 else {
44 offset = 0L - offset;
45 offsign = '-';
46 }
47 offset = ( (offset / 3600) * 100 ) + ( offset % 60 );
48
49 switch(which_format) {
50
52 return snprintf(
53 buf, n,
54 "%s, %02d %s %04d %02d:%02d:%02d %c%04ld",
55 weekdays[t.tm_wday],
56 t.tm_mday,
57 months[t.tm_mon],
58 t.tm_year + 1900,
59 t.tm_hour,
60 t.tm_min,
61 t.tm_sec,
62 offsign, offset
63 );
64 break;
65
66 case DATESTRING_IMAP:
67 return snprintf(
68 buf, n,
69 "%02d-%s-%04d %02d:%02d:%02d %c%04ld",
70 t.tm_mday,
71 months[t.tm_mon],
72 t.tm_year + 1900,
73 t.tm_hour,
74 t.tm_min,
75 t.tm_sec,
76 offsign, offset
77 );
78 break;
79
80 }
81 return 0;
82}
static char * weekdays[]
Definition: genstamp.c:18
long datestring(char *buf, size_t n, time_t xtime, int which_format)
Definition: genstamp.c:26
static char * months[]
Definition: genstamp.c:13
@ DATESTRING_RFC822
Definition: genstamp.h:5
@ DATESTRING_IMAP
Definition: genstamp.h:6
long timezone