Implement time().

1 files changed, 113 insertions, 1 deletions

diff --git a/sys/boot/ia64/ski/time.c b/sys/boot/ia64/ski/time.c
index 1005528..7e49886 100644
--- a/sys/boot/ia64/ski/time.c
+++ b/sys/boot/ia64/ski/time.c
@@ -45,6 +45,9 @@ static const char rcsid[] =
 
 #include <time.h>
 #include <sys/time.h>
+#include <stand.h>
+
+#include "libski.h"
 
 /*
 // Accurate only for the past couple of centuries;
@@ -57,9 +60,118 @@ static const char rcsid[] =
 #define SECSPERHOUR ( 60*60 )
 #define SECSPERDAY	(24 * SECSPERHOUR)
 
+struct ssc_time {
+	int	Year;
+	int	Month;
+	int	Day;
+	int	Hour;
+	int	Minute;
+	int	Second;
+	int	Msec;
+	int	Wday;
+};
+
+time_t
+EfiTimeToUnixTime(struct ssc_time *ETime)
+{
+    /*
+    //  These arrays give the cumulative number of days up to the first of the
+    //  month number used as the index (1 -> 12) for regular and leap years.
+    //  The value at index 13 is for the whole year.
+    */
+    static time_t CumulativeDays[2][14] = {
+    {0,
+     0,
+     31,
+     31 + 28,
+     31 + 28 + 31,
+     31 + 28 + 31 + 30,
+     31 + 28 + 31 + 30 + 31,
+     31 + 28 + 31 + 30 + 31 + 30,
+     31 + 28 + 31 + 30 + 31 + 30 + 31,
+     31 + 28 + 31 + 30 + 31 + 30 + 31 + 31,
+     31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
+     31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
+     31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30,
+     31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 },
+    {0,
+     0,
+     31,
+     31 + 29,
+     31 + 29 + 31,
+     31 + 29 + 31 + 30,
+     31 + 29 + 31 + 30 + 31,
+     31 + 29 + 31 + 30 + 31 + 30,
+     31 + 29 + 31 + 30 + 31 + 30 + 31,
+     31 + 29 + 31 + 30 + 31 + 30 + 31 + 31,
+     31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30,
+     31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31,
+     31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30,
+     31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 }};
+
+    time_t  UTime; 
+    int     Year;
+
+    ETime->Year += 1900;
+
+    /*
+    //  Do a santity check
+    */
+    if ( ETime->Year  <  1998 || ETime->Year   > 2099 ||
+    	 ETime->Month ==    0 || ETime->Month  >   12 ||
+    	 ETime->Day   ==    0 || ETime->Month  >   31 ||
+    	                         ETime->Hour   >   23 ||
+    	                         ETime->Minute >   59 ||
+    	                         ETime->Second >   59 ) {
+    	return (0);
+    }
+
+    /*
+    // Years
+    */
+    UTime = 0;
+    for (Year = 1970; Year != ETime->Year; ++Year) {
+        UTime += (CumulativeDays[isleap(Year)][13] * SECSPERDAY);
+    }
+
+    /*
+    // UTime should now be set to 00:00:00 on Jan 1 of the file's year.
+    //
+    // Months  
+    */
+    UTime += (CumulativeDays[isleap(ETime->Year)][ETime->Month] * SECSPERDAY);
+
+    /*
+    // UTime should now be set to 00:00:00 on the first of the file's month and year
+    //
+    // Days -- Don't count the file's day
+    */
+    UTime += (((ETime->Day > 0) ? ETime->Day-1:0) * SECSPERDAY);
+
+    /*
+    // Hours
+    */
+    UTime += (ETime->Hour * SECSPERHOUR);
+
+    /*
+    // Minutes
+    */
+    UTime += (ETime->Minute * 60);
+
+    /*
+    // Seconds
+    */
+    UTime += ETime->Second;
+
+    return UTime;
+}
 
 time_t
 time(time_t *tloc)
 {
-	return 0;		/* XXX */
+	struct ssc_time time;
+
+	ssc((u_int64_t) &time, 0, 0, 0, SSC_GET_RTC);
+
+	return *tloc = EfiTimeToUnixTime(&time);
 }