Annotation of src/usr.bin/make/timestamp.h, Revision 1.6
1.1 espie 1: #ifndef TIMESTAMP_H
2: #define TIMESTAMP_H
3:
1.6 ! espie 4: /* $OpenBSD: timestamp.h,v 1.5 2010/07/19 19:30:38 espie Exp $ */
1.1 espie 5:
6: /*
7: * Copyright (c) 2001 Marc Espie.
8: *
9: * Redistribution and use in source and binary forms, with or without
10: * modification, are permitted provided that the following conditions
11: * are met:
12: * 1. Redistributions of source code must retain the above copyright
13: * notice, this list of conditions and the following disclaimer.
14: * 2. Redistributions in binary form must reproduce the above copyright
15: * notice, this list of conditions and the following disclaimer in the
16: * documentation and/or other materials provided with the distribution.
17: *
18: * THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT AND CONTRIBUTORS
19: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21: * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OPENBSD
22: * PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28: * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29: */
30:
31: /* This module handles time stamps on files in a relatively high-level way.
32: * Most of the interface is achieved through inlineable code.
33: *
34: * TIMESTAMP: opaque data type to store a date.
35: * ts_set_out_of_date(t): set up t so that it is out-of-date.
36: * b = is_out_of_date(t): check whether t is out-of-date.
37: * ts_set_from_stat(s, t): grab date out of stat(2) buffer.
1.4 espie 38: * b = is_strictly_before(t1, t2):
1.1 espie 39: * check whether t1 is before t2.
40: * stamp = timestamp2time_t(t): extract time_t from timestamp.
41: * ts_set_from_time_t(d, t): create timestamp from time_t.
42: * ts_set_from_now(n): grab current date.
43: */
44:
1.3 espie 45: /* sysresult = set_times(name): set modification times on a file.
1.1 espie 46: * system call results.
47: */
48:
49: #define Init_Timestamp() ts_set_from_now(now)
50:
51: #ifndef TIMESTAMP_TYPE
52: #include "timestamp_t.h"
53: #endif
54: #ifdef USE_TIMESPEC
55: #define ts_set_out_of_date(t) (t).tv_sec = INT_MIN, (t).tv_nsec = 0
56: #define is_out_of_date(t) ((t).tv_sec == INT_MIN && (t).tv_nsec == 0)
57: #define ts_set_from_stat(s, t) \
58: do { \
59: (t).tv_sec = (s).st_mtime; \
60: (t).tv_nsec = (s).st_mtimensec; \
61: if (is_out_of_date(t)) \
62: (t).tv_nsec++; \
63: } while (0)
64: #define is_strictly_before(t1, t2) timespeccmp(&(t1), &(t2), <)
65: #define ts_set_from_time_t(d, t) \
66: do { \
67: (t).tv_sec = d; \
68: (t).tv_nsec = 0; \
69: if (is_out_of_date(t)) \
70: (t).tv_nsec++; \
71: } while (0)
72: #define ts_set_from_now(n) \
73: do { \
74: struct timeval tv; \
75: gettimeofday(&tv, NULL); \
76: TIMEVAL_TO_TIMESPEC(&(tv), &n); \
77: } while (0)
78: #define timestamp2time_t(t) ((t).tv_sec)
79: #else
80: #define is_out_of_date(t) ((t) == INT_MIN)
81: #define ts_set_out_of_date(t) (t) = INT_MIN
82: #define ts_set_from_stat(s, t) \
83: do { \
84: (t) = (s).st_mtime; \
85: if (is_out_of_date(t)) \
86: (t)++; \
87: } while (0)
88: #define is_strictly_before(t1, t2) ((t1) < (t2))
89: #define ts_set_from_time_t(d, t) \
90: do { \
91: (t) = d; \
92: if (is_out_of_date(t)) \
93: (t)++; \
94: } while (0)
95: #define ts_set_from_now(n) time(&(n))
96: #define timestamp2time_t(t) (t)
97: #endif
98:
99: extern int set_times(const char *);
100:
101: extern TIMESTAMP now; /* The time at the start of this whole
102: * process */
1.2 espie 103: extern char *time_to_string(TIMESTAMP t);
104:
1.1 espie 105:
106: #endif