/* systime.h - System-dependent definitions for time manipulations.
Copyright (C) 1993, 1994, 2002, 2003, 2004,
- 2005, 2006, 2007 Free Software Foundation, Inc.
+ 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
This file is part of GNU Emacs.
-GNU Emacs is free software; you can redistribute it and/or modify
+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.
+the Free Software Foundation, either version 3 of the License, 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
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, Inc., 51 Franklin Street, Fifth Floor,
-Boston, MA 02110-1301, USA. */
+along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
#ifndef EMACS_SYSTIME_H
#define EMACS_SYSTIME_H
extern time_t 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
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_HAS_USECS is defined if 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.
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.
+ EMACS_TIME_NEG_P (TIME) is true if TIME is negative.
*/
#endif
/* Compare times T1 and T2. Value is 0 if T1 and T2 are the same.
- Value is < 0 if T1 is less than T2. Value is > 0 otherwise. */
-
-#define EMACS_TIME_CMP(T1, T2) \
- (EMACS_SECS (T1) - EMACS_SECS (T2) \
- + (EMACS_SECS (T1) == EMACS_SECS (T2) \
- ? EMACS_USECS (T1) - EMACS_USECS (T2) \
+ Value is < 0 if T1 is less than T2. Value is > 0 otherwise. (Cast
+ to long is for those platforms where time_t is an unsigned
+ type, and where otherwise T1 will always be grater than T2.) */
+
+#define EMACS_TIME_CMP(T1, T2) \
+ ((long)EMACS_SECS (T1) - (long)EMACS_SECS (T2) \
+ + (EMACS_SECS (T1) == EMACS_SECS (T2) \
+ ? EMACS_USECS (T1) - EMACS_USECS (T2) \
: 0))
/* Compare times T1 and T2 for equality, inequality etc. */