Imported Upstream version 0.66.1

[hcoop/debian/courier-authlib.git] / libs / rfc822 / rfc822_mkdate.c

diff --git a/libs/rfc822/rfc822_mkdate.c b/libs/rfc822/rfc822_mkdate.c
new file mode 100644 (file)
index 0000000..ad84276
--- /dev/null
+++ b/libs/rfc822/rfc822_mkdate.c
@@ -0,0 +1,112 @@
+/*
+** Copyright 1998 - 1999 Double Precision, Inc.
+** See COPYING for distribution information.
+*/
+
+/*
+*/
+
+#include       "rfc822.h"
+
+#include       <sys/types.h>
+#include       <time.h>
+#include       <stdio.h>
+#include       <string.h>
+#if    HAVE_UNISTD_H
+#include       <unistd.h>
+#endif
+
+static const char * const months[]={
+       "Jan",
+       "Feb",
+       "Mar",
+       "Apr",
+       "May",
+       "Jun",
+       "Jul",
+       "Aug",
+       "Sep",
+       "Oct",
+       "Nov",
+       "Dec"};
+
+static const char * const wdays[]={
+       "Sun",
+       "Mon",
+       "Tue",
+       "Wed",
+       "Thu",
+       "Fri",
+       "Sat"};
+
+void rfc822_mkdate_buf(time_t t, char *buf)
+{
+struct tm *p;
+int    offset;
+
+#if    USE_TIME_ALTZONE
+
+       p=localtime(&t);
+       offset= -(int)timezone;
+
+       if (p->tm_isdst > 0)
+               offset= -(int)altzone;
+
+       if (offset % 60)
+       {
+               offset=0;
+               p=gmtime(&t);
+       }
+       offset /= 60;
+#else
+#if    USE_TIME_DAYLIGHT
+
+       p=localtime(&t);
+       offset= -(int)timezone;
+
+       if (p->tm_isdst > 0)
+               offset += 60*60;
+       if (offset % 60)
+       {
+               offset=0;
+               p=gmtime(&t);
+       }
+       offset /= 60;
+#else
+#if    USE_TIME_GMTOFF
+       p=localtime(&t);
+       offset= p->tm_gmtoff;
+
+       if (offset % 60)
+       {
+               offset=0;
+               p=gmtime(&t);
+       }
+       offset /= 60;
+#else
+       p=gmtime(&t);
+       offset=0;
+#endif
+#endif
+#endif
+
+       offset = (offset % 60) + offset / 60 * 100;
+
+       sprintf(buf, "%s, %02d %s %04d %02d:%02d:%02d %+05d",
+               wdays[p->tm_wday],
+               p->tm_mday,
+               months[p->tm_mon],
+               p->tm_year+1900,
+               p->tm_hour,
+               p->tm_min,
+               p->tm_sec,
+               offset);
+}
+
+const char *rfc822_mkdate(time_t t)
+{
+static char buf[50];
+
+       rfc822_mkdate_buf(t, buf);
+       return (buf);
+}