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10a4cc63 | 1 | /* systime.h - System-dependent definitions for time manipulations. |
c6c5df7f | 2 | Copyright (C) 1993 Free Software Foundation, Inc. |
f469625a JB |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
6 | GNU Emacs is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 1, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU Emacs; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
d712c26d | 20 | #ifdef TIME_WITH_SYS_TIME |
7b89707c | 21 | #include <sys/time.h> |
f469625a | 22 | #include <time.h> |
d712c26d | 23 | #else |
5cbdb356 JB |
24 | #ifdef HAVE_SYS_TIME_H |
25 | #include <sys/time.h> | |
d712c26d JB |
26 | #else |
27 | #include <time.h> | |
98f77753 | 28 | #endif |
b7cceaf1 | 29 | #endif |
7b89707c | 30 | |
2ffe7ef2 RS |
31 | #ifdef HAVE_TZNAME |
32 | #ifndef tzname /* For SGI. */ | |
33 | extern char *tzname[]; /* RS6000 and others want it this way. */ | |
34 | #endif | |
35 | #endif | |
36 | ||
9e70858b JB |
37 | /* SVr4 doesn't actually declare this in its #include files. */ |
38 | #ifdef USG5_4 | |
39 | extern long timezone; | |
40 | #endif | |
41 | ||
210b2b4f JB |
42 | #ifdef VMS |
43 | #ifdef VAXC | |
44 | #include "vmstime.h" | |
45 | #endif | |
46 | #endif | |
47 | ||
10a4cc63 | 48 | \f |
f469625a JB |
49 | /* EMACS_TIME is the type to use to represent temporal intervals - |
50 | struct timeval on some systems, int on others. It can be passed as | |
88729235 | 51 | the timeout argument to the select system call. |
f469625a JB |
52 | |
53 | EMACS_SECS (TIME) is an rvalue for the seconds component of TIME. | |
54 | EMACS_SET_SECS (TIME, SECONDS) sets that to SECONDS. | |
55 | ||
56 | EMACS_HAS_USECS is defined iff EMACS_TIME has a usecs component. | |
7f86bdac JB |
57 | EMACS_USECS (TIME) is an rvalue for the microseconds component of TIME. |
58 | This returns zero if EMACS_TIME doesn't have a microseconds component. | |
59 | EMACS_SET_USECS (TIME, MICROSECONDS) sets that to MICROSECONDS. | |
60 | This does nothing if EMACS_TIME doesn't have a microseconds component. | |
f469625a JB |
61 | |
62 | EMACS_SET_SECS_USECS (TIME, SECS, USECS) sets both components of TIME. | |
63 | ||
64 | EMACS_GET_TIME (TIME) stores the current system time in TIME, which | |
65 | should be an lvalue. | |
66 | EMACS_SET_UTIMES (PATH, ATIME, MTIME) changes the last-access and | |
67 | last-modification times of the file named PATH to ATIME and | |
68 | MTIME, which are EMACS_TIMEs. | |
69 | ||
70 | EMACS_ADD_TIME (DEST, SRC1, SRC2) adds SRC1 to SRC2 and stores the | |
71 | result in DEST. SRC should not be negative. | |
72 | ||
73 | EMACS_SUB_TIME (DEST, SRC1, SRC2) subtracts SRC2 from SRC1 and | |
74 | stores the result in DEST. SRC should not be negative. | |
75 | EMACS_TIME_NEG_P (TIME) is true iff TIME is negative. | |
76 | ||
77 | */ | |
78 | ||
79 | #ifdef HAVE_TIMEVAL | |
80 | ||
722687f5 JB |
81 | #define EMACS_HAS_USECS |
82 | ||
f469625a JB |
83 | #define EMACS_TIME struct timeval |
84 | #define EMACS_SECS(time) ((time).tv_sec + 0) | |
85 | #define EMACS_USECS(time) ((time).tv_usec + 0) | |
86 | #define EMACS_SET_SECS(time, seconds) ((time).tv_sec = (seconds)) | |
7f86bdac | 87 | #define EMACS_SET_USECS(time, microseconds) ((time).tv_usec = (microseconds)) |
f469625a | 88 | |
4fb83f3c RS |
89 | /* On SVR4, the compiler may complain if given this extra BSD arg. */ |
90 | #ifdef USG5_4 | |
91 | #define EMACS_GET_TIME(time) \ | |
92 | { \ | |
93 | gettimeofday (&(time)); \ | |
94 | } | |
95 | #else /* not USG5_4 */ | |
f469625a JB |
96 | #define EMACS_GET_TIME(time) \ |
97 | { \ | |
10a4cc63 | 98 | struct timezone dummy; \ |
f469625a JB |
99 | gettimeofday (&(time), &dummy); \ |
100 | } | |
4fb83f3c | 101 | #endif /* not USG5_4 */ |
f469625a JB |
102 | |
103 | #define EMACS_ADD_TIME(dest, src1, src2) \ | |
104 | { \ | |
105 | (dest).tv_sec = (src1).tv_sec + (src2).tv_sec; \ | |
106 | (dest).tv_usec = (src1).tv_usec + (src2).tv_usec; \ | |
107 | if ((dest).tv_usec > 1000000) \ | |
108 | (dest).tv_usec -= 1000000, (dest).tv_sec++; \ | |
109 | } | |
110 | ||
111 | #define EMACS_SUB_TIME(dest, src1, src2) \ | |
112 | { \ | |
113 | (dest).tv_sec = (src1).tv_sec - (src2).tv_sec; \ | |
114 | (dest).tv_usec = (src1).tv_usec - (src2).tv_usec; \ | |
115 | if ((dest).tv_usec < 0) \ | |
116 | (dest).tv_usec += 1000000, (dest).tv_sec--; \ | |
117 | } | |
118 | ||
119 | #define EMACS_TIME_NEG_P(time) \ | |
120 | ((time).tv_sec < 0 \ | |
121 | || ((time).tv_sec == 0 \ | |
122 | && (time).tv_usec < 0)) | |
123 | ||
10a4cc63 | 124 | #else /* ! defined (HAVE_TIMEVAL) */ |
f469625a JB |
125 | |
126 | #define EMACS_TIME int | |
127 | #define EMACS_SECS(time) (time) | |
ef15f270 | 128 | #define EMACS_USECS(time) 0 |
f469625a | 129 | #define EMACS_SET_SECS(time, seconds) ((time) = (seconds)) |
ef15f270 | 130 | #define EMACS_SET_USECS(time, usecs) 0 |
f469625a JB |
131 | |
132 | #define EMACS_GET_TIME(t) ((t) = time ((long *) 0)) | |
133 | #define EMACS_ADD_TIME(dest, src1, src2) ((dest) = (src1) + (src2)) | |
134 | #define EMACS_SUB_TIME(dest, src1, src2) ((dest) = (src1) - (src2)) | |
135 | #define EMACS_TIME_NEG_P(t) ((t) < 0) | |
136 | ||
10a4cc63 | 137 | #endif /* ! defined (HAVE_TIMEVAL) */ |
f469625a JB |
138 | |
139 | #define EMACS_SET_SECS_USECS(time, secs, usecs) \ | |
140 | (EMACS_SET_SECS (time, secs), EMACS_SET_USECS (time, usecs)) | |
141 | ||
142 | #ifdef USE_UTIME | |
143 | ||
144 | #define EMACS_SET_UTIMES(path, atime, mtime) \ | |
145 | { \ | |
ef15f270 | 146 | time_t tv[2]; \ |
f469625a JB |
147 | tv[0] = EMACS_SECS (atime); \ |
148 | tv[1] = EMACS_SECS (mtime); \ | |
149 | utime ((path), tv); \ | |
150 | } | |
151 | ||
10a4cc63 | 152 | #else /* ! defined (USE_UTIME) */ |
f469625a JB |
153 | |
154 | #define EMACS_SET_UTIMES(path, atime, mtime) \ | |
155 | { \ | |
156 | EMACS_TIME tv[2]; \ | |
157 | tv[0] = atime; \ | |
158 | tv[1] = mtime; \ | |
159 | utimes ((path), tv); \ | |
160 | } | |
161 | ||
10a4cc63 | 162 | #endif /* ! defined (USE_UTIME) */ |