Initial revision

1 files changed, 158 insertions, 0 deletions

diff --git a/include/linux/time.h b/include/linux/time.h
new file mode 100644
index 0000000000..bf12b99d37
--- /dev/null
+++ b/include/linux/time.h
@@ -0,0 +1,158 @@
+#ifndef _LINUX_TIME_H
+#define _LINUX_TIME_H
+
+#include <linux/types.h>
+
+#define _DEFUN(a,b,c) a(c)
+#define _CONST const
+#define _AND ,
+
+#define _REENT_ONLY
+
+#define SECSPERMIN	60L
+#define MINSPERHOUR	60L
+#define HOURSPERDAY	24L
+#define SECSPERHOUR	(SECSPERMIN * MINSPERHOUR)
+#define SECSPERDAY	(SECSPERHOUR * HOURSPERDAY)
+#define DAYSPERWEEK	7
+#define MONSPERYEAR	12
+
+#define YEAR_BASE	1900
+#define EPOCH_YEAR      1970
+#define EPOCH_WDAY      4
+
+#define isleap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0)
+
+
+/* Used by other time functions.  */
+struct tm {
+    int tm_sec;                   /* Seconds.     [0-60] (1 leap second) */
+    int tm_min;                   /* Minutes.     [0-59] */
+    int tm_hour;                  /* Hours.       [0-23] */
+    int tm_mday;                  /* Day.         [1-31] */
+    int tm_mon;                   /* Month.       [0-11] */
+    int tm_year;                  /* Year - 1900.  */
+    int tm_wday;                  /* Day of week. [0-6] */
+    int tm_yday;                  /* Days in year.[0-365] */
+    int tm_isdst;                 /* DST.         [-1/0/1]*/
+
+# ifdef __USE_BSD
+    long int tm_gmtoff;           /* Seconds east of UTC.  */
+    __const char *tm_zone;        /* Timezone abbreviation.  */
+# else
+    long int __tm_gmtoff;         /* Seconds east of UTC.  */
+    __const char *__tm_zone;      /* Timezone abbreviation.  */
+# endif
+};
+
+static inline char *
+_DEFUN (asctime_r, (tim_p, result),
+	_CONST struct tm *tim_p _AND
+	char *result)
+{
+    static _CONST char day_name[7][3] = {
+	"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
+    };
+    static _CONST char mon_name[12][3] = {
+	"Jan", "Feb", "Mar", "Apr", "May", "Jun",
+	"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
+    };
+
+    sprintf (result, "%.3s %.3s %.2d %.2d:%.2d:%.2d %d\n",
+	    day_name[tim_p->tm_wday],
+	    mon_name[tim_p->tm_mon],
+	    tim_p->tm_mday, tim_p->tm_hour, tim_p->tm_min,
+	    tim_p->tm_sec, 1900 + tim_p->tm_year);
+    return result;
+}
+
+static inline struct tm *
+_DEFUN (localtime_r, (tim_p, res),
+	_CONST time_t * tim_p _AND
+	struct tm *res)
+{
+    static _CONST int mon_lengths[2][MONSPERYEAR] = {
+      {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
+      {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
+    } ;
+
+    static _CONST int year_lengths[2] = {
+      365,
+      366
+    } ;
+
+    long days, rem;
+    int y;
+    int yleap;
+    _CONST int *ip;
+
+    days = ((long) *tim_p) / SECSPERDAY;
+    rem = ((long) *tim_p) % SECSPERDAY;
+    while (rem < 0)
+    {
+	rem += SECSPERDAY;
+	--days;
+    }
+    while (rem >= SECSPERDAY)
+    {
+	rem -= SECSPERDAY;
+	++days;
+    }
+
+    /* compute hour, min, and sec */
+    res->tm_hour = (int) (rem / SECSPERHOUR);
+    rem %= SECSPERHOUR;
+    res->tm_min = (int) (rem / SECSPERMIN);
+    res->tm_sec = (int) (rem % SECSPERMIN);
+
+    /* compute day of week */
+    if ((res->tm_wday = ((EPOCH_WDAY + days) % DAYSPERWEEK)) < 0)
+	res->tm_wday += DAYSPERWEEK;
+
+    /* compute year & day of year */
+    y = EPOCH_YEAR;
+    if (days >= 0)
+    {
+	for (;;)
+	{
+	    yleap = isleap(y);
+	    if (days < year_lengths[yleap])
+		break;
+	    y++;
+	    days -= year_lengths[yleap];
+	}
+    }
+    else
+    {
+	do
+	{
+	    --y;
+	    yleap = isleap(y);
+	    days += year_lengths[yleap];
+	} while (days < 0);
+    }
+
+    res->tm_year = y - YEAR_BASE;
+    res->tm_yday = days;
+    ip = mon_lengths[yleap];
+    for (res->tm_mon = 0; days >= ip[res->tm_mon]; ++res->tm_mon)
+	days -= ip[res->tm_mon];
+    res->tm_mday = days + 1;
+
+    /* set daylight saving time flag */
+    res->tm_isdst = -1;
+
+    return (res);
+}
+
+static inline char *
+_DEFUN (ctime_r, (tim_p, result),
+	_CONST time_t * tim_p _AND
+	char * result)
+
+{
+    struct tm tm;
+    return asctime_r (localtime_r (tim_p, &tm), result);
+}
+
+#endif