+ /* Convert "seconds west of GMT" to "hours/minutes offset" */
+#ifdef HAVE_STRUCT_TM_TM_GMTOFF
+ offset = t.tm_gmtoff;
+#else
+ offset = timezone;
+#endif
+ if (offset > 0) {
+ offsign = '+';
+ }
+ else {
+ offset = 0L - offset;
+ offsign = '-';
+ }
+ offset = ( (offset / 3600) * 100 ) + ( offset % 60 );
+
+ switch(which_format) {
+
+ case DATESTRING_RFC822:
+ return snprintf(
+ buf, n,
+ "%s, %02d %s %04d %02d:%02d:%02d %c%04ld",
+ weekdays[t.tm_wday],
+ t.tm_mday,
+ months[t.tm_mon],
+ t.tm_year + 1900,
+ t.tm_hour,
+ t.tm_min,
+ t.tm_sec,
+ offsign, offset
+ );
+ break;
+
+ case DATESTRING_IMAP:
+ return snprintf(
+ buf, n,
+ "%02d-%s-%04d %02d:%02d:%02d %c%04ld",
+ t.tm_mday,
+ months[t.tm_mon],
+ t.tm_year + 1900,
+ t.tm_hour,
+ t.tm_min,
+ t.tm_sec,
+ offsign, offset
+ );
+ break;
+
+ }
+ return 0;
+}