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36: * ts_set_out_of_date(t): set up t so that it is out-of-date.
37: * b = is_out_of_date(t): check whether t is out-of-date.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