1#ifndef _LINUX_TIME_H
2#define _LINUX_TIME_H
3
4#include <rtc.h>
5#include <vsprintf.h>
6#include <linux/types.h>
7
8#define _DEFUN(a,b,c) a(c)
9#define _CONST const
10#define _AND ,
11
12#define _REENT_ONLY
13
14#define MSEC_PER_SEC	1000L
15#define USEC_PER_MSEC	1000L
16#define NSEC_PER_USEC	1000L
17#define NSEC_PER_MSEC	1000000L
18#define USEC_PER_SEC	1000000L
19#define NSEC_PER_SEC	1000000000L
20#define PSEC_PER_SEC	1000000000000LL
21#define FSEC_PER_SEC	1000000000000000LL
22
23#define SECSPERMIN	60L
24#define MINSPERHOUR	60L
25#define HOURSPERDAY	24L
26#define SECSPERHOUR	(SECSPERMIN * MINSPERHOUR)
27#define SECSPERDAY	(SECSPERHOUR * HOURSPERDAY)
28#define DAYSPERWEEK	7
29#define MONSPERYEAR	12
30
31#define YEAR_BASE	1900
32#define EPOCH_YEAR      1970
33#define EPOCH_WDAY      4
34
35#define isleap(y) ((((y) % 4) == 0 && ((y) % 100) != 0) || ((y) % 400) == 0)
36
37
38/* Used by other time functions.  */
39struct tm {
40    int tm_sec;                   /* Seconds.     [0-60] (1 leap second) */
41    int tm_min;                   /* Minutes.     [0-59] */
42    int tm_hour;                  /* Hours.       [0-23] */
43    int tm_mday;                  /* Day.         [1-31] */
44    int tm_mon;                   /* Month.       [0-11] */
45    int tm_year;                  /* Year - 1900.  */
46    int tm_wday;                  /* Day of week. [0-6] */
47    int tm_yday;                  /* Days in year.[0-365] */
48    int tm_isdst;                 /* DST.         [-1/0/1]*/
49
50# ifdef __USE_BSD
51    long int tm_gmtoff;           /* Seconds east of UTC.  */
52    __const char *tm_zone;        /* Timezone abbreviation.  */
53# else
54    long int __tm_gmtoff;         /* Seconds east of UTC.  */
55    __const char *__tm_zone;      /* Timezone abbreviation.  */
56# endif
57};
58
59static inline char *
60_DEFUN (asctime_r, (tim_p, result),
61	_CONST struct tm *tim_p _AND
62	char *result)
63{
64    static _CONST char day_name[7][3] = {
65	"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
66    };
67    static _CONST char mon_name[12][3] = {
68	"Jan", "Feb", "Mar", "Apr", "May", "Jun",
69	"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
70    };
71
72    sprintf (result, "%.3s %.3s %.2d %.2d:%.2d:%.2d %d\n",
73	    day_name[tim_p->tm_wday],
74	    mon_name[tim_p->tm_mon],
75	    tim_p->tm_mday, tim_p->tm_hour, tim_p->tm_min,
76	    tim_p->tm_sec, 1900 + tim_p->tm_year);
77    return result;
78}
79
80static inline struct tm *
81_DEFUN (localtime_r, (tim_p, res),
82	_CONST time_t * tim_p _AND
83	struct tm *res)
84{
85    static _CONST int mon_lengths[2][MONSPERYEAR] = {
86      {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
87      {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
88    } ;
89
90    static _CONST int year_lengths[2] = {
91      365,
92      366
93    } ;
94
95    long days, rem;
96    int y;
97    int yleap;
98    _CONST int *ip;
99
100    days = ((long) *tim_p) / SECSPERDAY;
101    rem = ((long) *tim_p) % SECSPERDAY;
102    while (rem < 0)
103    {
104	rem += SECSPERDAY;
105	--days;
106    }
107
108    /* compute hour, min, and sec */
109    res->tm_hour = (int) (rem / SECSPERHOUR);
110    rem %= SECSPERHOUR;
111    res->tm_min = (int) (rem / SECSPERMIN);
112    res->tm_sec = (int) (rem % SECSPERMIN);
113
114    /* compute day of week */
115    if ((res->tm_wday = ((EPOCH_WDAY + days) % DAYSPERWEEK)) < 0)
116	res->tm_wday += DAYSPERWEEK;
117
118    /* compute year & day of year */
119    y = EPOCH_YEAR;
120    if (days >= 0)
121    {
122	for (;;)
123	{
124	    yleap = isleap(y);
125	    if (days < year_lengths[yleap])
126		break;
127	    y++;
128	    days -= year_lengths[yleap];
129	}
130    }
131    else
132    {
133	do
134	{
135	    --y;
136	    yleap = isleap(y);
137	    days += year_lengths[yleap];
138	} while (days < 0);
139    }
140
141    res->tm_year = y - YEAR_BASE;
142    res->tm_yday = days;
143    ip = mon_lengths[yleap];
144    for (res->tm_mon = 0; days >= ip[res->tm_mon]; ++res->tm_mon)
145	days -= ip[res->tm_mon];
146    res->tm_mday = days + 1;
147
148    /* set daylight saving time flag */
149    res->tm_isdst = -1;
150
151    return (res);
152}
153
154static inline char *
155_DEFUN (ctime_r, (tim_p, result),
156	_CONST time_t * tim_p _AND
157	char * result)
158
159{
160    struct tm tm;
161    return asctime_r (localtime_r (tim_p, &tm), result);
162}
163
164#ifdef CONFIG_LIB_DATE
165time64_t mktime64(const unsigned int year, const unsigned int mon,
166		  const unsigned int day, const unsigned int hour,
167		  const unsigned int min, const unsigned int sec);
168#endif
169
170#endif
171