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Member "citadel/genstamp.c" (5 Jun 2021, 1500 Bytes) of package /linux/www/citadel.tar.gz:


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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 
   13 static char *months[] = {
   14     "Jan", "Feb", "Mar", "Apr", "May", "Jun",
   15     "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
   16 };
   17 
   18 static 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  */
   26 long 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 
   51         case DATESTRING_RFC822:
   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 }