/* systime.h - System-dependent definitions for time manipulations.
- Copyright (C) 1992 Free Software Foundation, Inc.
+ Copyright (C) 1993 Free Software Foundation, Inc.
This file is part of GNU Emacs.
along with GNU Emacs; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-#if defined (HAVE_TIMEVAL) && !defined (NEED_TIME_H)
-/* NEED_TIME_H is necessary because some versions of HP/UX shouldn't
- have this included; time.h should do the trick instead. */
-
+#ifdef TIME_WITH_SYS_TIME
+#include <sys/time.h>
+#include <time.h>
+#else
+#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
-
#else
-
-/* _h_BSDTYPES is checked because on ISC unix, socket.h includes
- both time.h and sys/time.h, and the later file is protected
- from repeated inclusion. We just hope that other systems will
- use this guard either not at all, or similarly. */
-#ifndef _h_BSDTYPES
#include <time.h>
-#endif /* _h_BSDTYPES */
-
+#endif
#endif
-/* AIX needs both <sys/time.h> and <time.h>. */
-#ifdef _AIX
-#include <time.h>
+#ifdef HAVE_TZNAME
+#ifndef tzname /* For SGI. */
+extern char *tzname[]; /* RS6000 and others want it this way. */
+#endif
#endif
/* SVr4 doesn't actually declare this in its #include files. */
extern long timezone;
#endif
+#ifdef VMS
+#ifdef VAXC
+#include "vmstime.h"
+#endif
+#endif
+
\f
/* EMACS_TIME is the type to use to represent temporal intervals -
struct timeval on some systems, int on others. It can be passed as
- the timeout argument to the select () system call.
+ the timeout argument to the select system call.
EMACS_SECS (TIME) is an rvalue for the seconds component of TIME.
EMACS_SET_SECS (TIME, SECONDS) sets that to SECONDS.
EMACS_HAS_USECS is defined iff EMACS_TIME has a usecs component.
- EMACS_USECS (TIME) is an rvalue for the milliseconds component of TIME.
- This returns zero if EMACS_TIME doesn't have a milliseconds component.
- EMACS_SET_USECS (TIME, MILLISECONDS) sets that to MILLISECONDS.
- This does nothing if EMACS_TIME doesn't have a milliseconds component.
+ EMACS_USECS (TIME) is an rvalue for the microseconds component of TIME.
+ This returns zero if EMACS_TIME doesn't have a microseconds component.
+ EMACS_SET_USECS (TIME, MICROSECONDS) sets that to MICROSECONDS.
+ This does nothing if EMACS_TIME doesn't have a microseconds component.
EMACS_SET_SECS_USECS (TIME, SECS, USECS) sets both components of TIME.
#ifdef HAVE_TIMEVAL
+#define EMACS_HAS_USECS
+
#define EMACS_TIME struct timeval
#define EMACS_SECS(time) ((time).tv_sec + 0)
#define EMACS_USECS(time) ((time).tv_usec + 0)
#define EMACS_SET_SECS(time, seconds) ((time).tv_sec = (seconds))
-#define EMACS_SET_USECS(time, milliseconds) ((time).tv_usec = (milliseconds))
+#define EMACS_SET_USECS(time, microseconds) ((time).tv_usec = (microseconds))
+/* On SVR4, the compiler may complain if given this extra BSD arg. */
+#ifdef USG5_4
+#define EMACS_GET_TIME(time) \
+{ \
+ gettimeofday (&(time)); \
+}
+#else /* not USG5_4 */
#define EMACS_GET_TIME(time) \
{ \
struct timezone dummy; \
gettimeofday (&(time), &dummy); \
}
+#endif /* not USG5_4 */
#define EMACS_ADD_TIME(dest, src1, src2) \
{ \
}
#define EMACS_TIME_NEG_P(time) \
- ((time).tv_sec < 0 \
+ ((long)(time).tv_sec < 0 \
|| ((time).tv_sec == 0 \
- && (time).tv_usec < 0))
+ && (long)(time).tv_usec < 0))
#else /* ! defined (HAVE_TIMEVAL) */
}
#endif /* ! defined (USE_UTIME) */
-
-\f
-
-/* EMACS_CURRENT_TIME_ZONE (int *OFFSET, int *SAVINGS_FLAG,
- char *STANDARD_ABBR, char *SAVINGS_ABBR);
- expands to a statement which stores information about the current
- time zone in its arguments.
-
- *OFFSET is set to the number of minutes EAST of Greenwich at which
- the site's time zone is located. This should describe the offset
- to standard time only; if some sort of daylight savings time is in
- effect, that should not affect this value. Note that the tm_gmtoff
- member of the struct tm returned by localtime is adjusted for
- daylight savings, so you don't want to use localtime to set
- *OFFSET; gettimeofday does the right thing.
-
- *SAVINGS_FLAG is set to 1 if some sort of daylight savings time is
- currently in effect, or 0 if no seasonal adjustment is currently
- active.
-
- *STANDARD_ABBR points to an array of at least 10 characters, which
- should be set to the standard abbreviation for the time zone name
- when daylight savings time is not active. For example, EDT would
- be appropriate for the Eastern time zone of the USA.
-
- *SAVINGS_ABBR points to an array of at least 10 characters, which
- should be set to the standard abbreviation for the time zone name
- when daylight savings time is active. For example, EST would be
- appropriate for the Eastern time zone of the USA.
-
- If the operating system cannot provide all this information, then
- this macro will not be defined. */
-
-
-/* The operating system configuration file can define
- EMACS_CURRENT_TIME_ZONE. If not, we'll take a shot at it here. */
-
-#ifndef EMACS_CURRENT_TIME_ZONE
-
-/* System V derivatives have a timezone global variable. */
-#ifdef USG
-#define EMACS_GET_TZ_OFFSET(offset) \
- do { \
- tzset (); \
- *(offset) = timezone; \
- } while (0)
-#endif
-
-/* If we have timeval, then we have gettimeofday; that's half the battle. */
-#if defined (HAVE_TIMEVAL) && !defined (EMACS_GET_TZ_OFFSET)
-#define EMACS_GET_TZ_OFFSET(offset) \
- do { \
- struct timeval dummy; \
- struct timezone zoneinfo; \
- \
- gettimeofday (&dummy, &zoneinfo); \
- *(offset) = -zoneinfo.tz_minuteswest; \
- } while (0)
-#endif /* ! defined (HAVE_TIMEVAL) */
-
-/* The following sane systems have a tzname array. The timezone() function
- is a stupid idea; timezone names can only be determined geographically,
- not by Greenwich offset. */
-#if defined (ultrix) || defined (hpux) || defined (_AIX) || defined (USG)
-
-#define EMACS_GET_TZ_NAMES(standard, savings) \
- do { \
- extern char *tzname[2]; \
- strcpy ((standard), tzname[0]); \
- strcpy ((savings), tzname[1]); \
- } while (0)
-
-#else /* ! defined (ultrix) || defined (hpux) || defined (_AIX) */
-/* If we are running SunOS, Mt. Xinu BSD, or MACH 2.5, these systems have a
- timezone() function. */
-#if (defined (hp9000) && ! defined (hpux) && defined (unix)) || defined (MACH) || defined (sun)
-
-#define EMACS_GET_TZ_NAMES(standard, savings) \
- do { \
- struct timeval dummy; \
- struct timezone zoneinfo; \
- extern char *timezone (); \
- \
- gettimeofday (&dummy, &zoneinfo); \
- strcpy ((standard), timezone (zoneinfo.tz_minuteswest, 0)); \
- strcpy ((savings), timezone (zoneinfo.tz_minuteswest, 1)); \
- } while (0)
-
-#endif /* ! (defined (hp9000) && ! defined (hpux) && defined (unix)) || defined (MACH) || defined (sun) */
-#endif /* ! defined (ultrix) || defined (hpux) || defined (_AIX) */
-
-/* If we can get all the information we need, let's define the macro! */
-#if defined (EMACS_GET_TZ_OFFSET) && defined (EMACS_GET_TZ_NAMES)
-
-#define EMACS_CURRENT_TIME_ZONE(offset, savings_flag, standard, savings)\
- do { \
- EMACS_TIME t; \
- long secs; \
- struct tm *tmp; \
- \
- EMACS_GET_TIME (t); \
- secs = EMACS_SECS (t); \
- tmp = localtime (&secs); \
- *(savings_flag) = tmp->tm_isdst; \
- \
- EMACS_GET_TZ_OFFSET (offset); \
- EMACS_GET_TZ_NAMES (standard, savings); \
- } while (0)
-#endif /* ! defined (EMACS_GET_TZ_OFFSET) && defined (EMACS_GET_TZ_NAMES) */
-
-#endif /* EMACS_CURRENT_TIME_ZONE */
HCoop / bpt / emacs.git / blobdiff