1 files changed, 112 insertions, 0 deletions
diff --git a/rfc822/rfc822_mkdate.c b/rfc822/rfc822_mkdate.c
new file mode 100644
index 0000000..ad84276
--- /dev/null
+++ b/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);
+}