1 #ifndef TIMESTAMP_H 2 #define TIMESTAMP_H 3 4 /* $OpenBSD: timestamp.h,v 1.7 2011/12/10 04:12:36 guenther Exp $ */ 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code. 33 * 34 * TIMESTAMP: opaque data type to store a date. 35 * ts_set_out_of_date(t): set up t so that it is out-of-date. 36 * b = is_out_of_date(t): check whether t is out-of-date. 37 * ts_set_from_stat(s, t): grab date out of stat(2) buffer. 38 * b = is_strictly_before(t1, t2): 39 * check whether t1 is before t2. 40 * stamp =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 45 /* sysresult = set_times(name): set modification times on a file. 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) clock_gettime(CLOCK_REALTIME, &(n)) 73 #define timestamp2time_t(t) ((t).tv_sec) 74 #else 75 #define is_out_of_date(t) ((t) == INT_MIN) 76 #define ts_set_out_of_date(t) (t) = INT_MIN 77 #define ts_set_from_stat(s, t) \ 78 do { \ 79 (t) = (s).st_mtime; \ 80 if (is_out_of_date(t)) \ 81 (t)++; \ 82 } while (0) 83 #define is_strictly_before(t1, t2) ((t1) < (t2)) 84 #define ts_set_from_time_t(d, t) \ 85 do { \ 86 (t) = d; \ 87 if (is_out_of_date(t)) \ 88 (t)++; \ 89 } while (0) 90 #define ts_set_from_now(n) time(&(n)) 91 #define timestamp2time_t(t) (t) 92 #endif 93 94 extern int set_times(const char *); 95 96 extern TIMESTAMP now; /* The time at the start of this whole 97 * process */ 98 extern char *time_to_string(TIMESTAMP t); 99 100 101 #endif 102