X-Git-Url: http://git.hcoop.net/bpt/emacs.git/blobdiff_plain/10a4cc6301e2975c1a7c52ea749092a69203b301..7c938215cd28ae6b7c95d02c5e29839c9be68925:/src/systime.h diff --git a/src/systime.h b/src/systime.h dissimilarity index 64% index b5a850da1d..e93962c6e1 100644 --- a/src/systime.h +++ b/src/systime.h @@ -1,233 +1,148 @@ -/* systime.h - System-dependent definitions for time manipulations. - Copyright (C) 1992 Free Software Foundation, Inc. - -This file is part of GNU Emacs. - -GNU Emacs is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 1, or (at your option) -any later version. - -GNU Emacs is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with GNU Emacs; see the file COPYING. If not, write to -the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ - -#ifdef NEED_TIME_H - -/* _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 -#endif /* _h_BSDTYPES */ -#else /* ! defined (NEED_TIME_H) */ -#ifdef HAVE_TIMEVAL -#include -#endif /* ! defined (HAVE_TIMEVAL) */ -#endif /* ! defined (NEED_TIME_H) */ - - -/* 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. - - 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_SET_SECS_USECS (TIME, SECS, USECS) sets both components of TIME. - - EMACS_GET_TIME (TIME) stores the current system time in TIME, which - should be an lvalue. - EMACS_SET_UTIMES (PATH, ATIME, MTIME) changes the last-access and - last-modification times of the file named PATH to ATIME and - MTIME, which are EMACS_TIMEs. - - EMACS_ADD_TIME (DEST, SRC1, SRC2) adds SRC1 to SRC2 and stores the - result in DEST. SRC should not be negative. - - EMACS_SUB_TIME (DEST, SRC1, SRC2) subtracts SRC2 from SRC1 and - stores the result in DEST. SRC should not be negative. - EMACS_TIME_NEG_P (TIME) is true iff TIME is negative. - -*/ - -#ifdef HAVE_TIMEVAL - -#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_GET_TIME(time) \ -{ \ - struct timezone dummy; \ - gettimeofday (&(time), &dummy); \ -} - -#define EMACS_ADD_TIME(dest, src1, src2) \ -{ \ - (dest).tv_sec = (src1).tv_sec + (src2).tv_sec; \ - (dest).tv_usec = (src1).tv_usec + (src2).tv_usec; \ - if ((dest).tv_usec > 1000000) \ - (dest).tv_usec -= 1000000, (dest).tv_sec++; \ -} - -#define EMACS_SUB_TIME(dest, src1, src2) \ -{ \ - (dest).tv_sec = (src1).tv_sec - (src2).tv_sec; \ - (dest).tv_usec = (src1).tv_usec - (src2).tv_usec; \ - if ((dest).tv_usec < 0) \ - (dest).tv_usec += 1000000, (dest).tv_sec--; \ -} - -#define EMACS_TIME_NEG_P(time) \ - ((time).tv_sec < 0 \ - || ((time).tv_sec == 0 \ - && (time).tv_usec < 0)) - -#else /* ! defined (HAVE_TIMEVAL) */ - -#define EMACS_TIME int -#define EMACS_SECS(time) (time) -#define EMACS_SET_SECS(time, seconds) ((time) = (seconds)) - -#define EMACS_GET_TIME(t) ((t) = time ((long *) 0)) -#define EMACS_ADD_TIME(dest, src1, src2) ((dest) = (src1) + (src2)) -#define EMACS_SUB_TIME(dest, src1, src2) ((dest) = (src1) - (src2)) -#define EMACS_TIME_NEG_P(t) ((t) < 0) - -#endif /* ! defined (HAVE_TIMEVAL) */ - -#define EMACS_SET_SECS_USECS(time, secs, usecs) \ - (EMACS_SET_SECS (time, secs), EMACS_SET_USECS (time, usecs)) - -#ifdef USE_UTIME - -#define EMACS_SET_UTIMES(path, atime, mtime) \ - { \ - struct time_t tv[2]; \ - tv[0] = EMACS_SECS (atime); \ - tv[1] = EMACS_SECS (mtime); \ - utime ((path), tv); \ - } - -#else /* ! defined (USE_UTIME) */ - -#define EMACS_SET_UTIMES(path, atime, mtime) \ - { \ - EMACS_TIME tv[2]; \ - tv[0] = atime; \ - tv[1] = mtime; \ - utimes ((path), tv); \ - } - -#endif /* ! defined (USE_UTIME) */ - - - -/* 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 west 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 - -/* If we have timeval, then we have gettimeofday; that's half the battle. */ -#ifdef HAVE_TIMEVAL -#define EMACS_GET_TZ_OFFSET_AND_SAVINGS(offset, savings_flag) \ - do { \ - struct timeval dummy; \ - struct timezone zoneinfo; \ - \ - gettimeofday (&dummy, &zoneinfo); \ - *(offset) = zoneinfo.tz_minuteswest; \ - *(savings_flag) = zoneinfo.tz_dsttime; \ - } 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) - -#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_AND_SAVINGS) && defined (EMACS_GET_TZ_NAMES) - -#define EMACS_CURRENT_TIME_ZONE(offset, savings_flag, standard, savings)\ - do { \ - EMACS_GET_TZ_OFFSET_AND_SAVINGS (offset, savings_flag); \ - EMACS_GET_TZ_NAMES (standard, savings); \ - } while (0) - -#endif /* ! defined (EMACS_GET_TZ_OFFSET_AND_SAVINGS) && defined (EMACS_GET_TZ_NAMES) */ - -#endif /* EMACS_CURRENT_TIME_ZONE */ +/* systime.h - System-dependent definitions for time manipulations. + Copyright (C) 1993, 1994 Free Software Foundation, Inc. + +This file is part of GNU Emacs. + +GNU Emacs is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Emacs is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Emacs; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#ifdef TIME_WITH_SYS_TIME +#include +#include +#else +#ifdef HAVE_SYS_TIME_H +#include +#else +#include +#endif +#endif + +#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. */ +#ifdef USG5_4 +extern long timezone; +#endif + +#ifdef VMS +#ifdef VAXC +#include "vmstime.h" +#endif +#endif + +/* On some configurations (hpux8.0, X11R4), sys/time.h and X11/Xos.h + disagree about the name of the guard symbol. */ +#ifdef HPUX +#ifdef _STRUCT_TIMEVAL +#ifndef __TIMEVAL__ +#define __TIMEVAL__ +#endif +#endif +#endif + +/* 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. + + 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 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. + + EMACS_GET_TIME (TIME) stores the current system time in TIME, which + should be an lvalue. + + EMACS_ADD_TIME (DEST, SRC1, SRC2) adds SRC1 to SRC2 and stores the + result in DEST. SRC should not be negative. + + EMACS_SUB_TIME (DEST, SRC1, SRC2) subtracts SRC2 from SRC1 and + stores the result in DEST. SRC should not be negative. + EMACS_TIME_NEG_P (TIME) is true iff TIME is negative. + +*/ + +#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, microseconds) ((time).tv_usec = (microseconds)) + +/* On SVR4, the compiler may complain if given this extra BSD arg. */ +#ifdef GETTIMEOFDAY_ONE_ARGUMENT +#define EMACS_GET_TIME(time) \ +{ \ + gettimeofday (&(time)); \ +} +#else /* not GETTIMEOFDAY_ONE_ARGUMENT */ +#define EMACS_GET_TIME(time) \ +{ \ + struct timezone dummy; \ + gettimeofday (&(time), &dummy); \ +} +#endif /* not GETTIMEOFDAY_ONE_ARGUMENT */ + +#define EMACS_ADD_TIME(dest, src1, src2) \ +{ \ + (dest).tv_sec = (src1).tv_sec + (src2).tv_sec; \ + (dest).tv_usec = (src1).tv_usec + (src2).tv_usec; \ + if ((dest).tv_usec > 1000000) \ + (dest).tv_usec -= 1000000, (dest).tv_sec++; \ +} + +#define EMACS_SUB_TIME(dest, src1, src2) \ +{ \ + (dest).tv_sec = (src1).tv_sec - (src2).tv_sec; \ + (dest).tv_usec = (src1).tv_usec - (src2).tv_usec; \ + if ((dest).tv_usec < 0) \ + (dest).tv_usec += 1000000, (dest).tv_sec--; \ +} + +#define EMACS_TIME_NEG_P(time) \ + ((long)(time).tv_sec < 0 \ + || ((time).tv_sec == 0 \ + && (long)(time).tv_usec < 0)) + +#else /* ! defined (HAVE_TIMEVAL) */ + +#define EMACS_TIME int +#define EMACS_SECS(time) (time) +#define EMACS_USECS(time) 0 +#define EMACS_SET_SECS(time, seconds) ((time) = (seconds)) +#define EMACS_SET_USECS(time, usecs) 0 + +#define EMACS_GET_TIME(t) ((t) = time ((long *) 0)) +#define EMACS_ADD_TIME(dest, src1, src2) ((dest) = (src1) + (src2)) +#define EMACS_SUB_TIME(dest, src1, src2) ((dest) = (src1) - (src2)) +#define EMACS_TIME_NEG_P(t) ((t) < 0) + +#endif /* ! defined (HAVE_TIMEVAL) */ + +#define EMACS_SET_SECS_USECS(time, secs, usecs) \ + (EMACS_SET_SECS (time, secs), EMACS_SET_USECS (time, usecs)) + +extern int set_file_times ();