Initial source

1 files changed, 77 insertions, 0 deletions

diff --git a/i386/dos/dos_gettimeofday.c b/i386/dos/dos_gettimeofday.c
new file mode 100644
index 0000000..3b61bab
--- /dev/null
+++ b/i386/dos/dos_gettimeofday.c
@@ -0,0 +1,77 @@
+/* 
+ * Copyright (c) 1995-1994 The University of Utah and
+ * the Computer Systems Laboratory at the University of Utah (CSL).
+ * All rights reserved.
+ *
+ * Permission to use, copy, modify and distribute this software is hereby
+ * granted provided that (1) source code retains these copyright, permission,
+ * and disclaimer notices, and (2) redistributions including binaries
+ * reproduce the notices in supporting documentation, and (3) all advertising
+ * materials mentioning features or use of this software display the following
+ * acknowledgement: ``This product includes software developed by the
+ * Computer Systems Laboratory at the University of Utah.''
+ *
+ * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
+ * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
+ * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * CSL requests users of this software to return to csl-dist@cs.utah.edu any
+ * improvements that they make and grant CSL redistribution rights.
+ *
+ *      Author: Bryan Ford, University of Utah CSL
+ */
+
+#include <unistd.h>
+#include <errno.h>
+#include <sys/time.h>
+
+#include "dos_io.h"
+#include "debug.h"
+
+int dos_gettimeofday(struct timeval *tv, struct timezone *tz)
+{
+	static int daysofmonth[12] = {31, 28, 31, 30, 31, 30, 31,
+				      31, 30, 31, 30, 31};
+
+	struct real_call_data real_call_data;
+	int err;
+
+	dos_init_rcd(&real_call_data);
+
+	if (tv)
+	{
+		int year, month, day, hour, min, sec, hund;
+
+		real_call_data.eax = 0x2a00;
+		real_int(0x21, &real_call_data);
+		year = real_call_data.ecx & 0xffff;
+		month = (real_call_data.edx >> 8) & 0xff;
+		day = real_call_data.edx & 0xff;
+		real_call_data.eax = 0x2c00;
+		real_int(0x21, &real_call_data);
+		if (err = dos_check_err(&real_call_data))
+			return err;
+
+		hour = (real_call_data.ecx >> 8) & 0xff;
+		min = real_call_data.ecx & 0xff;
+		sec = (real_call_data.edx >> 8) & 0xff;
+		hund = real_call_data.edx & 0xff;
+
+		tv->tv_sec = (year - 1970) * (365 * 24 * 60 * 60);
+		tv->tv_sec += (year - 1970) / 4 * (24 * 60 * 60); /* XXX??? */
+		tv->tv_sec += daysofmonth[month-1] * (24 * 60 * 60);
+		if ((((year - 1970) % 4) == 0) && (month > 2)) /* XXX??? */
+			tv->tv_sec += 24 * 60 * 60;
+		tv->tv_sec += day * 24 * 60 * 60;
+		tv->tv_sec += hour * 60 * 60;
+		tv->tv_sec += min * 60;
+		tv->tv_sec += sec;
+		tv->tv_usec = hund * (1000000 / 100);
+	}
+	if (tz)
+		return EINVAL; /*XXX*/
+
+	assert(tz == 0);
+	return 0;
+}
+