summaryrefslogtreecommitdiffstats
path: root/lib/libc/stdtime/time32.c
blob: e852a4f279e4b03feaa2c57330713a08875107d5 (plain)
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
/*-
 * Copyright (c) 2001 FreeBSD Inc.
 * All rights reserved.
 *
 * These routines are for converting time_t to fixed-bit representations
 * for use in protocols or storage.  When converting time to a larger
 * representation of time_t these routines are expected to assume temporal
 * locality and use the 50-year rule to properly set the msb bits.  XXX
 *
 * Redistribution and use under the terms of the COPYRIGHT file at the
 * base of the source tree.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include <sys/types.h>
#include <timeconv.h>

/*
 * Convert a 32 bit representation of time_t into time_t.  XXX needs to
 * implement the 50-year rule to handle post-2038 conversions.
 */
time_t
_time32_to_time(__int32_t t32)
{
    return((time_t)t32);
}

/*
 * Convert time_t to a 32 bit representation.  If time_t is 64 bits we can
 * simply chop it down.   The resulting 32 bit representation can be 
 * converted back to a temporally local 64 bit time_t using time32_to_time.
 */
__int32_t
_time_to_time32(time_t t)
{
    return((__int32_t)t);
}

/*
 * Convert a 64 bit representation of time_t into time_t.  If time_t is
 * represented as 32 bits we can simply chop it and not support times
 * past 2038.
 */
time_t
_time64_to_time(__int64_t t64)
{
    return((time_t)t64);
}

/*
 * Convert time_t to a 64 bit representation.  If time_t is represented
 * as 32 bits we simply sign-extend and do not support times past 2038.
 */
__int64_t
_time_to_time64(time_t t)
{
    return((__int64_t)t);
}

/*
 * Convert to/from 'long'.  Depending on the sizeof(long) this may or 
 * may not require using the 50-year rule.
 */
long
_time_to_long(time_t t)
{
    if (sizeof(long) == sizeof(__int64_t))
	return(_time_to_time64(t));
    return((long)t);
}

time_t
_long_to_time(long tlong)
{
    if (sizeof(long) == sizeof(__int32_t))
	return(_time32_to_time(tlong));
    return((time_t)tlong);
}

/*
 * Convert to/from 'int'.  Depending on the sizeof(int) this may or 
 * may not require using the 50-year rule.
 */
int
_time_to_int(time_t t)
{
    if (sizeof(int) == sizeof(__int64_t))
	return(_time_to_time64(t));
    return((int)t);
}

time_t
_int_to_time(int tint)
{
    if (sizeof(int) == sizeof(__int32_t))
	return(_time32_to_time(tint));
    return((time_t)tint);
}
OpenPOWER on IntegriCloud