/* Lisp functions pertaining to editing. -*- coding: utf-8 -*-
-Copyright (C) 1985-1987, 1989, 1993-2015 Free Software Foundation, Inc.
+Copyright (C) 1985-1987, 1989, 1993-2016 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 3 of the License, 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
error ("Specified time is not representable");
}
-static void
+static _Noreturn void
invalid_time (void)
{
error ("Invalid time specification");
Lisp_Object high, low, usec, psec;
struct lisp_time t;
int len = disassemble_lisp_time (specified_time, &high, &low, &usec, &psec);
- int val = len ? decode_time_components (high, low, usec, psec, &t, 0) : 0;
+ if (!len)
+ invalid_time ();
+ int val = decode_time_components (high, low, usec, psec, &t, 0);
check_time_validity (val);
*plen = len;
return t;
doc: /* Return the current time, as a float number of seconds since the epoch.
If SPECIFIED-TIME is given, it is the time to convert to float
instead of the current time. The argument should have the form
-(HIGH LOW) or (HIGH LOW USEC) or (HIGH LOW USEC PSEC). Thus,
+\(HIGH LOW) or (HIGH LOW USEC) or (HIGH LOW USEC PSEC). Thus,
you can use times from `current-time' and from `file-attributes'.
SPECIFIED-TIME can also have the form (HIGH . LOW), but this is
considered obsolete.
doc: /* Use FORMAT-STRING to format the time TIME, or now if omitted.
TIME is specified as (HIGH LOW USEC PSEC), as returned by
`current-time' or `file-attributes'. The obsolete form (HIGH . LOW)
-is also still accepted.
-The optional ZONE is omitted or nil for Emacs local time, t for
-Universal Time, `wall' for system wall clock time, or a string as in
-`set-time-zone-rule' for a time zone rule.
+is also still accepted. The optional ZONE is omitted or nil for Emacs
+local time, t for Universal Time, `wall' for system wall clock time,
+or a string as in the TZ environment variable.
+
The value is a copy of FORMAT-STRING, but with certain constructs replaced
by text that describes the specified date and time in TIME:
current time. The obsolete form (HIGH . LOW) is also still accepted.
The optional ZONE is omitted or nil for Emacs local time, t for
Universal Time, `wall' for system wall clock time, or a string as in
-`set-time-zone-rule' for a time zone rule.
+the TZ environment variable.
The list has the following nine members: SEC is an integer between 0
and 60; SEC is 60 for a leap second, which only some operating systems
This is the reverse operation of `decode-time', which see.
The optional ZONE is omitted or nil for Emacs local time, t for
Universal Time, `wall' for system wall clock time, or a string as in
-`set-time-zone-rule' for a time zone rule. It can also be a list (as
-from `current-time-zone') or an integer (as from `decode-time')
-applied without consideration for daylight saving time.
+the TZ environment variable. It can also be a list (as from
+`current-time-zone') or an integer (as from `decode-time') applied
+without consideration for daylight saving time.
You can pass more than 7 arguments; then the first six arguments
are used as SECOND through YEAR, and the *last* argument is used as ZONE.
The optional ZONE is omitted or nil for Emacs local time, t for
Universal Time, `wall' for system wall clock time, or a string as in
-`set-time-zone-rule' for a time zone rule. */)
+the TZ environment variable. */)
(Lisp_Object specified_time, Lisp_Object zone)
{
time_t value = lisp_seconds_argument (specified_time);
NAME is a string giving the name of the time zone.
If SPECIFIED-TIME is given, the time zone offset is determined from it
instead of using the current time. The argument should have the form
-(HIGH LOW . IGNORED). Thus, you can use times obtained from
+\(HIGH LOW . IGNORED). Thus, you can use times obtained from
`current-time' and from `file-attributes'. SPECIFIED-TIME can also
have the form (HIGH . LOW), but this is considered obsolete.
Optional second arg ZONE is omitted or nil for the local time zone, or
-a string as in `set-time-zone-rule'.
+a string as in the TZ environment variable.
Some operating systems cannot provide all this information to Emacs;
in this case, `current-time-zone' returns a list containing nil for
DEFUN ("set-time-zone-rule", Fset_time_zone_rule, Sset_time_zone_rule, 1, 1, 0,
doc: /* Set the Emacs local time zone using TZ, a string specifying a time zone rule.
-If TZ is nil or `wall', use system wall clock time. If TZ is t, use
-Universal Time. If TZ is an integer, treat it as in `encode-time'.
+
+If TZ is nil or `wall', use system wall clock time; this differs from
+the usual Emacs convention where nil means current local time. If TZ
+is t, use Universal Time. If TZ is an integer, treat it as in
+`encode-time'.
Instead of calling this function, you typically want something else.
To temporarily use a different time zone rule for just one invocation
DEFUN ("save-restriction", Fsave_restriction, Ssave_restriction, 0, UNEVALLED, 0,
doc: /* Execute BODY, saving and restoring current buffer's restrictions.
The buffer's restrictions make parts of the beginning and end invisible.
-(They are set up with `narrow-to-region' and eliminated with `widen'.)
+\(They are set up with `narrow-to-region' and eliminated with `widen'.)
This special form, `save-restriction', saves the current buffer's restrictions
when it is entered, and restores them when it is exited.
So any `narrow-to-region' within BODY lasts only until the end of the form.