(diary-mode, fancy-diary-display-mode): Derive from fundamental-mode
[emacs.git] / src / systime.h
blob778e555c979443d586fc401f1612ca26df1a0b7d
1 /* systime.h - System-dependent definitions for time manipulations.
2 Copyright (C) 1993, 1994 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
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 2, or (at your option)
9 any later version.
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.
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, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 #ifndef EMACS_SYSTIME_H
22 #define EMACS_SYSTIME_H
24 #ifdef TIME_WITH_SYS_TIME
25 #include <sys/time.h>
26 #include <time.h>
27 #else
28 #ifdef HAVE_SYS_TIME_H
29 #include <sys/time.h>
30 #else
31 #include <time.h>
32 #endif
33 #endif
35 #ifdef HAVE_TZNAME
36 #ifndef tzname /* For SGI. */
37 extern char *tzname[]; /* RS6000 and others want it this way. */
38 #endif
39 #endif
41 /* SVr4 doesn't actually declare this in its #include files. */
42 #ifdef USG5_4
43 extern time_t timezone;
44 #endif
46 #ifdef VMS
47 #ifdef VAXC
48 #include "vmstime.h"
49 #endif
50 #endif
52 /* On some configurations (hpux8.0, X11R4), sys/time.h and X11/Xos.h
53 disagree about the name of the guard symbol. */
54 #ifdef HPUX
55 #ifdef _STRUCT_TIMEVAL
56 #ifndef __TIMEVAL__
57 #define __TIMEVAL__
58 #endif
59 #endif
60 #endif
62 /* EMACS_TIME is the type to use to represent temporal intervals -
63 struct timeval on some systems, int on others. It can be passed as
64 the timeout argument to the select system call.
66 EMACS_SECS (TIME) is an rvalue for the seconds component of TIME.
67 EMACS_SET_SECS (TIME, SECONDS) sets that to SECONDS.
69 EMACS_HAS_USECS is defined iff EMACS_TIME has a usecs component.
70 EMACS_USECS (TIME) is an rvalue for the microseconds component of TIME.
71 This returns zero if EMACS_TIME doesn't have a microseconds component.
72 EMACS_SET_USECS (TIME, MICROSECONDS) sets that to MICROSECONDS.
73 This does nothing if EMACS_TIME doesn't have a microseconds component.
75 EMACS_SET_SECS_USECS (TIME, SECS, USECS) sets both components of TIME.
77 EMACS_GET_TIME (TIME) stores the current system time in TIME, which
78 should be an lvalue.
80 EMACS_ADD_TIME (DEST, SRC1, SRC2) adds SRC1 to SRC2 and stores the
81 result in DEST. SRC should not be negative.
83 EMACS_SUB_TIME (DEST, SRC1, SRC2) subtracts SRC2 from SRC1 and
84 stores the result in DEST. SRC should not be negative.
85 EMACS_TIME_NEG_P (TIME) is true iff TIME is negative.
89 #ifdef HAVE_TIMEVAL
91 #define EMACS_HAS_USECS
93 #define EMACS_TIME struct timeval
94 #define EMACS_SECS(time) ((time).tv_sec + 0)
95 #define EMACS_USECS(time) ((time).tv_usec + 0)
96 #define EMACS_SET_SECS(time, seconds) ((time).tv_sec = (seconds))
97 #define EMACS_SET_USECS(time, microseconds) ((time).tv_usec = (microseconds))
99 /* On SVR4, the compiler may complain if given this extra BSD arg. */
100 #ifdef GETTIMEOFDAY_ONE_ARGUMENT
101 #define EMACS_GET_TIME(time) gettimeofday (&(time))
102 #else /* not GETTIMEOFDAY_ONE_ARGUMENT */
103 #ifdef HAVE_STRUCT_TIMEZONE
104 #define EMACS_GET_TIME(time) \
105 do { \
106 struct timezone dummy; \
107 gettimeofday (&(time), &dummy); \
108 } while (0)
109 #else
110 /* Presumably the second arg is ignored. */
111 #define EMACS_GET_TIME(time) gettimeofday (&(time), NULL)
112 #endif /* HAVE_STRUCT_TIMEZONE */
113 #endif /* not GETTIMEOFDAY_ONE_ARGUMENT */
115 #define EMACS_ADD_TIME(dest, src1, src2) \
116 do { \
117 (dest).tv_sec = (src1).tv_sec + (src2).tv_sec; \
118 (dest).tv_usec = (src1).tv_usec + (src2).tv_usec; \
119 if ((dest).tv_usec > 1000000) \
120 (dest).tv_usec -= 1000000, (dest).tv_sec++; \
121 } while (0)
123 #define EMACS_SUB_TIME(dest, src1, src2) \
124 do { \
125 (dest).tv_sec = (src1).tv_sec - (src2).tv_sec; \
126 (dest).tv_usec = (src1).tv_usec - (src2).tv_usec; \
127 if ((dest).tv_usec < 0) \
128 (dest).tv_usec += 1000000, (dest).tv_sec--; \
129 } while (0)
131 #define EMACS_TIME_NEG_P(time) \
132 ((long)(time).tv_sec < 0 \
133 || ((time).tv_sec == 0 \
134 && (long)(time).tv_usec < 0))
136 #else /* ! defined (HAVE_TIMEVAL) */
138 #define EMACS_TIME int
139 #define EMACS_SECS(time) (time)
140 #define EMACS_USECS(time) 0
141 #define EMACS_SET_SECS(time, seconds) ((time) = (seconds))
142 #define EMACS_SET_USECS(time, usecs) 0
144 #define EMACS_GET_TIME(t) ((t) = time ((long *) 0))
145 #define EMACS_ADD_TIME(dest, src1, src2) ((dest) = (src1) + (src2))
146 #define EMACS_SUB_TIME(dest, src1, src2) ((dest) = (src1) - (src2))
147 #define EMACS_TIME_NEG_P(t) ((t) < 0)
149 #endif /* ! defined (HAVE_TIMEVAL) */
151 #define EMACS_SET_SECS_USECS(time, secs, usecs) \
152 (EMACS_SET_SECS (time, secs), EMACS_SET_USECS (time, usecs))
154 extern int set_file_times __P ((const char *, EMACS_TIME, EMACS_TIME));
156 /* Compare times T1 and T2. Value is 0 if T1 and T2 are the same.
157 Value is < 0 if T1 is less than T2. Value is > 0 otherwise. */
159 #define EMACS_TIME_CMP(T1, T2) \
160 (EMACS_SECS (T1) - EMACS_SECS (T2) \
161 + (EMACS_SECS (T1) == EMACS_SECS (T2) \
162 ? EMACS_USECS (T1) - EMACS_USECS (T2) \
163 : 0))
165 /* Compare times T1 and T2 for equality, inequality etc. */
167 #define EMACS_TIME_EQ(T1, T2) (EMACS_TIME_CMP (T1, T2) == 0)
168 #define EMACS_TIME_NE(T1, T2) (EMACS_TIME_CMP (T1, T2) != 0)
169 #define EMACS_TIME_GT(T1, T2) (EMACS_TIME_CMP (T1, T2) > 0)
170 #define EMACS_TIME_GE(T1, T2) (EMACS_TIME_CMP (T1, T2) >= 0)
171 #define EMACS_TIME_LT(T1, T2) (EMACS_TIME_CMP (T1, T2) < 0)
172 #define EMACS_TIME_LE(T1, T2) (EMACS_TIME_CMP (T1, T2) <= 0)
174 #endif /* EMACS_SYSTIME_H */
176 /* arch-tag: dcb79915-cf99-4bce-9778-aade71d07651
177 (do not change this comment) */