1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
|
#ifndef LINT
static char nixtimeid[]="@(#) nixtime.i 2.3 88/01/24 12:49:28";
#endif /* LINT */
/*
Time handling routines for UNIX systems. These are included by the file
machine.c as needed.
The contents of this file are hereby released to the public domain.
-- Rahul Dhesi 1986/12/31
*/
#include <sys/types.h>
#include <time.h>
#include <utime.h>
struct tm *localtime();
/*****************
Function gettime() gets the date and time of the file handle supplied.
Date and time is in MSDOS format.
*/
int gettime (file, date, time)
ZOOFILE file;
unsigned *date, *time;
{
struct stat buf; /* buffer to hold file information */
struct tm *tm; /* will hold year/month/day etc. */
int handle;
handle = fileno(file);
if (fstat (handle, &buf) == -1) {
prterror ('w', "Could not get file time\n");
*date = *time = 0;
} else {
tm = localtime (&buf.st_mtime); /* get info about file mod time */
*date = tm->tm_mday + ((tm->tm_mon + 1) << 5) +
((tm->tm_year - 80) << 9);
*time = tm->tm_sec / 2 + (tm->tm_min << 5) +
(tm->tm_hour << 11);
}
}
/*****************
Function setutime() sets the date and time of the filename supplied.
Date and time is in MSDOS format. It assumes the existence of a function
mstonix() that accepts MSDOS format time and returns **IX format time,
and a function gettz() that returns the difference (localtime - gmt)
in seconds, taking daylight savings time into account.
*/
int setutime(path,date,time)
char *path;
unsigned int date, time;
{
long mstonix();
long gettz();
struct utimbuf utbf;
utbf.actime = utbf.modtime = gettz() + mstonix (date, time);
return (utime (path, &utbf));
}
/****************
Function mstonix() accepts an MSDOS format date and time and returns
a **IX format time. No adjustment is done for timezone.
*/
long mstonix (date, time)
unsigned int date, time;
{
int year, month, day, hour, min, sec, daycount;
long longtime;
/* no. of days to beginning of month for each month */
static int dsboy[12] = { 0, 31, 59, 90, 120, 151, 181, 212,
243, 273, 304, 334};
if (date == 0 && time == 0) /* special case! */
return (0L);
/* part of following code is common to zoolist.c */
year = (((unsigned int) date >> 9) & 0x7f) + 1980;
month = ((unsigned int) date >> 5) & 0x0f;
day = date & 0x1f;
hour = ((unsigned int) time >> 11)& 0x1f;
min = ((unsigned int) time >> 5) & 0x3f;
sec = ((unsigned int) time & 0x1f) * 2;
/*
DEBUG and leap year fixes thanks to Mark Alexander
<uunet!amdahl!drivax!alexande>
*/
#ifdef DEBUG
printf ("mstonix: year=%d month=%d day=%d hour=%d min=%d sec=%d\n",
year, month, day, hour, min, sec);
#endif
/* Calculate days since 1970/01/01 */
daycount = 365 * (year - 1970) + /* days due to whole years */
(year - 1969) / 4 + /* days due to leap years */
dsboy[month-1] + /* days since beginning of this year */
day-1; /* days since beginning of month */
if (year % 4 == 0 &&
year % 400 != 0 && month >= 3) /* if this is a leap year and month */
daycount++; /* is March or later, add a day */
/* Knowing the days, we can find seconds */
longtime = daycount * 24L * 60L * 60L +
hour * 60L * 60L + min * 60 + sec;
return (longtime);
}
|
