Add 2011 to FSF/AIST copyright years.

[bpt/emacs.git] / src / systime.h

diff --git a/src/systime.h b/src/systime.h
index 9851db4..228ca4c 100644 (file)
--- a/src/systime.h
+++ b/src/systime.h
@@ -1,13 +1,13 @@
 /* systime.h - System-dependent definitions for time manipulations.
    Copyright (C) 1993, 1994, 2002, 2003, 2004,
-                 2005 Free Software Foundation, Inc.
+                 2005, 2006, 2007, 2008, 2009, 2010, 2011 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
@@ -15,9 +15,7 @@ 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, 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
@@ -44,12 +42,6 @@ extern char *tzname[];       /* RS6000 and others want it this way.  */
 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
@@ -67,7 +59,7 @@ extern time_t timezone;
    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.
@@ -83,7 +75,7 @@ extern time_t timezone;
 
    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.
 
 */
 
@@ -101,16 +93,8 @@ extern time_t timezone;
 #ifdef GETTIMEOFDAY_ONE_ARGUMENT
 #define EMACS_GET_TIME(time) gettimeofday (&(time))
 #else /* not GETTIMEOFDAY_ONE_ARGUMENT */
-#ifdef HAVE_STRUCT_TIMEZONE
-#define EMACS_GET_TIME(time)                   \
-  do {                                         \
-    struct timezone dummy;                     \
-    gettimeofday (&(time), &dummy);            \
-  } while (0)
-#else
 /* Presumably the second arg is ignored.  */
 #define EMACS_GET_TIME(time) gettimeofday (&(time), NULL)
-#endif /* HAVE_STRUCT_TIMEZONE */
 #endif /* not GETTIMEOFDAY_ONE_ARGUMENT */
 
 #define EMACS_ADD_TIME(dest, src1, src2)               \
@@ -166,12 +150,14 @@ extern Lisp_Object make_time __P ((time_t));
 #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.  */