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annotate tests/test-utimens-common.h @ 40186:8964917f9574

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author Karl Berry <karl@freefriends.org>
date Mon, 18 Feb 2019 08:02:49 -0800
parents b06060465f09
children 5a52ef2d4772
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1 /* Test of file timestamp modification functions.
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2 Copyright (C) 2009-2019 Free Software Foundation, Inc.
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3
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4 This program is free software: you can redistribute it and/or modify
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5 it under the terms of the GNU General Public License as published by
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6 the Free Software Foundation; either version 3 of the License, or
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7 (at your option) any later version.
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8
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9 This program is distributed in the hope that it will be useful,
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 GNU General Public License for more details.
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13
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14 You should have received a copy of the GNU General Public License
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15 along with this program. If not, see <https://www.gnu.org/licenses/>. */
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16
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17 /* This file defines some prerequisites useful to utime-related tests. */
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18
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19 #ifndef GL_TEST_UTIMENS_COMMON
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20 # define GL_TEST_UTIMENS_COMMON
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21
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22 # include <fcntl.h>
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23 # include <errno.h>
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24 # include <string.h>
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25 # include <sys/stat.h>
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26 # include <unistd.h>
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27
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28 /* Gnulib modules. */
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29 # include "stat-time.h"
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30 # include "timespec.h"
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31 # include "utimecmp.h"
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32
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33 /* Gnulib test header. */
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34 # include "nap.h"
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35
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36 enum {
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37 BILLION = 1000 * 1000 * 1000,
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38
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39 Y2K = 946684800, /* Jan 1, 2000, in seconds since epoch. */
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40
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41 /* Bogus positive and negative tv_nsec values closest to valid
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42 range, but without colliding with UTIME_NOW or UTIME_OMIT. */
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43 UTIME_BOGUS_POS = BILLION + ((UTIME_NOW == BILLION || UTIME_OMIT == BILLION)
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44 ? (1 + (UTIME_NOW == BILLION + 1)
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45 + (UTIME_OMIT == BILLION + 1))
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46 : 0),
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47 UTIME_BOGUS_NEG = -1 - ((UTIME_NOW == -1 || UTIME_OMIT == -1)
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48 ? (1 + (UTIME_NOW == -2) + (UTIME_OMIT == -2))
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49 : 0)
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50 };
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51
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52 # if defined _WIN32 && !defined __CYGWIN__
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53 /* Skip ctime tests on native Windows, since it is either a copy of
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54 mtime or birth time (depending on the file system), rather than a
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55 properly tracked change time. See
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56 <https://msdn.microsoft.com/en-us/library/14h5k7ff(VS.80).aspx>. */
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57 # define check_ctime 0
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58 # else
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59 # define check_ctime 1
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60 # endif
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61
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62 /* Compare two st_ctime values. Return -1, 0 or 1, respectively
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63 when A's st_ctime is smaller than, equal to or greater than B's. */
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64 static int
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65 ctime_compare (struct stat const *a, struct stat const *b)
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66 {
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67 if (a->st_ctime < b->st_ctime)
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68 return -1;
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69 else if (b->st_ctime < a->st_ctime)
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70 return 1;
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71 else if (get_stat_ctime_ns (a) < get_stat_ctime_ns (b))
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72 return -1;
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73 else if (get_stat_ctime_ns (b) < get_stat_ctime_ns (a))
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74 return 1;
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75 else
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76 return 0;
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77 }
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78
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79 #endif /* GL_TEST_UTIMENS_COMMON */