| 1 | /* stat-related time functions.
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| 2 |
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| 3 | Copyright (C) 2005 Free Software Foundation, Inc.
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| 4 |
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| 5 | This program is free software; you can redistribute it and/or modify
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| 6 | it under the terms of the GNU General Public License as published by
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| 7 | the Free Software Foundation; either version 2, or (at your option)
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| 8 | any later version.
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| 9 |
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| 10 | This program is distributed in the hope that it will be useful,
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | GNU General Public License for more details.
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| 14 |
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| 15 | You should have received a copy of the GNU General Public License
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| 16 | along with this program; if not, write to the Free Software Foundation,
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| 17 | Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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| 18 |
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| 19 | /* Written by Paul Eggert. */
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| 20 |
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| 21 | #ifndef STAT_TIME_H
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| 22 | #define STAT_TIME_H 1
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| 23 |
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| 24 | #include "timespec.h"
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| 25 |
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| 26 | /* STAT_TIMESPEC (ST, ST_XTIM) is the ST_XTIM member for *ST of type
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| 27 | struct timespec, if available. If not, then STAT_TIMESPEC_NS (ST,
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| 28 | ST_XTIM) is the nanosecond component of the ST_XTIM member for *ST,
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| 29 | if available. ST_XTIM can be st_atim, st_ctim, or st_mtim for
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| 30 | access, status change, or data modification time, respectively.
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| 31 |
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| 32 | These macros are private to stat-time.h. */
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| 33 | #if defined HAVE_STRUCT_STAT_ST_ATIM_TV_NSEC
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| 34 | # ifdef TYPEOF_STRUCT_STAT_ST_ATIM_IS_STRUCT_TIMESPEC
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| 35 | # define STAT_TIMESPEC(st, st_xtim) ((st)->st_xtim)
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| 36 | # else
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| 37 | # define STAT_TIMESPEC_NS(st, st_xtim) ((st)->st_xtim.tv_nsec)
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| 38 | # endif
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| 39 | #elif defined HAVE_STRUCT_STAT_ST_ATIMESPEC_TV_NSEC
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| 40 | # define STAT_TIMESPEC(st, st_xtim) ((st)->st_xtim##espec)
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| 41 | #elif defined HAVE_STRUCT_STAT_ST_ATIMENSEC
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| 42 | # define STAT_TIMESPEC_NS(st, st_xtim) ((st)->st_xtim##ensec)
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| 43 | #elif defined HAVE_STRUCT_STAT_ST_ATIM_ST__TIM_TV_NSEC
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| 44 | # define STAT_TIMESPEC_NS(st, st_xtim) ((st)->st_xtim.st__tim.tv_nsec)
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| 45 | #endif
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| 46 |
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| 47 | /* Return the nanosecond component of *ST's access time. */
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| 48 | static inline long int
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| 49 | get_stat_atime_ns (struct stat const *st)
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| 50 | {
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| 51 | # if defined STAT_TIMESPEC
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| 52 | return STAT_TIMESPEC (st, st_atim).tv_nsec;
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| 53 | # elif defined STAT_TIMESPEC_NS
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| 54 | return STAT_TIMESPEC_NS (st, st_atim);
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| 55 | # elif defined HAVE_STRUCT_STAT_ST_SPARE1
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| 56 | return st->st_spare1 * 1000;
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| 57 | # else
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| 58 | return 0;
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| 59 | # endif
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| 60 | }
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| 61 |
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| 62 | /* Return the nanosecond component of *ST's status change time. */
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| 63 | static inline long int
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| 64 | get_stat_ctime_ns (struct stat const *st)
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| 65 | {
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| 66 | # if defined STAT_TIMESPEC
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| 67 | return STAT_TIMESPEC (st, st_ctim).tv_nsec;
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| 68 | # elif defined STAT_TIMESPEC_NS
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| 69 | return STAT_TIMESPEC_NS (st, st_ctim);
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| 70 | # elif defined HAVE_STRUCT_STAT_ST_SPARE1
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| 71 | return st->st_spare3 * 1000;
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| 72 | # else
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| 73 | return 0;
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| 74 | # endif
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| 75 | }
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| 76 |
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| 77 | /* Return the nanosecond component of *ST's data modification time. */
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| 78 | static inline long int
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| 79 | get_stat_mtime_ns (struct stat const *st)
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| 80 | {
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| 81 | # if defined STAT_TIMESPEC
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| 82 | return STAT_TIMESPEC (st, st_mtim).tv_nsec;
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| 83 | # elif defined STAT_TIMESPEC_NS
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| 84 | return STAT_TIMESPEC_NS (st, st_mtim);
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| 85 | # elif defined HAVE_STRUCT_STAT_ST_SPARE1
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| 86 | return st->st_spare2 * 1000;
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| 87 | # else
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| 88 | return 0;
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| 89 | # endif
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| 90 | }
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| 91 |
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| 92 | /* Return *ST's access time. */
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| 93 | static inline struct timespec
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| 94 | get_stat_atime (struct stat const *st)
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| 95 | {
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| 96 | #ifdef STAT_TIMESPEC
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| 97 | return STAT_TIMESPEC (st, st_atim);
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| 98 | #else
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| 99 | struct timespec t;
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| 100 | t.tv_sec = st->st_atime;
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| 101 | t.tv_nsec = get_stat_atime_ns (st);
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| 102 | return t;
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| 103 | #endif
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| 104 | }
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| 105 |
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| 106 | /* Return *ST's status change time. */
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| 107 | static inline struct timespec
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| 108 | get_stat_ctime (struct stat const *st)
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| 109 | {
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| 110 | #ifdef STAT_TIMESPEC
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| 111 | return STAT_TIMESPEC (st, st_ctim);
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| 112 | #else
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| 113 | struct timespec t;
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| 114 | t.tv_sec = st->st_ctime;
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| 115 | t.tv_nsec = get_stat_ctime_ns (st);
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| 116 | return t;
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| 117 | #endif
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| 118 | }
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| 119 |
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| 120 | /* Return *ST's data modification time. */
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| 121 | static inline struct timespec
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| 122 | get_stat_mtime (struct stat const *st)
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| 123 | {
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| 124 | #ifdef STAT_TIMESPEC
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| 125 | return STAT_TIMESPEC (st, st_mtim);
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| 126 | #else
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| 127 | struct timespec t;
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| 128 | t.tv_sec = st->st_mtime;
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| 129 | t.tv_nsec = get_stat_mtime_ns (st);
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| 130 | return t;
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| 131 | #endif
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| 132 | }
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| 133 |
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| 134 | #endif
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