Merge from origin/emacs-25
ca50981Improve time zone documentationc23c965Prevent bootstrap autoload backup files9344612Disable multicolor fonts on OS X since they are not supported...c41ce1cCapitalize “Universal Time” in documentation10597c9Don't use 'find-program'
This commit is contained in:
Paul Eggert
commit
7c2c2196fd
12 changed files with 116 additions and 82 deletions
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@ -641,8 +641,9 @@ to put temporary files (@pxref{Backup}). Emacs tries to use
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@env{TMP}, then @env{TEMP}, and finally @file{c:/temp}.
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@item TZ
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@vindex TZ, environment variable
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This specifies the current time zone and possibly also daylight
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saving time information. On MS-DOS, if @env{TZ} is not set in the
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This specifies the default time zone and possibly also daylight
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saving time information. @xref{Time Zone Rules,,, elisp, The GNU
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Emacs Lisp Reference Manual}. On MS-DOS, if @env{TZ} is not set in the
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environment when Emacs starts, Emacs defines a default value as
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appropriate for the country code returned by DOS@. On MS-Windows, Emacs
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does not use @env{TZ} at all.
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@ -19,6 +19,7 @@ terminal and the screen.
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* System Environment:: Distinguish the name and kind of system.
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* User Identification:: Finding the name and user id of the user.
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* Time of Day:: Getting the current time.
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* Time Zone Rules:: Rules for time zones and daylight saving time.
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* Time Conversion:: Converting a time from numeric form to
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calendrical data and vice versa.
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* Time Parsing:: Converting a time from numeric form to text
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@ -1259,7 +1260,7 @@ information may some day be added at the end.
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The argument @var{time}, if given, specifies a time to format,
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instead of the current time. The optional argument @var{zone}
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defaults to the current time zone rule.
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defaults to the current time zone rule. @xref{Time Zone Rules}.
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@example
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@group
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@ -1296,26 +1297,9 @@ For example, if @var{time} is a number, @code{(time-to-seconds
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or rounding errors occur.
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@end defun
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@defun current-time-zone &optional time zone
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@cindex time zone, current
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This function returns a list describing the time zone that the user is
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in.
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The value has the form @code{(@var{offset} @var{name})}. Here
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@var{offset} is an integer giving the number of seconds ahead of Universal Time
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(east of Greenwich). A negative value means west of Greenwich. The
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second element, @var{name}, is a string giving the name of the time
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zone. Both elements change when daylight saving time begins or ends;
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if the user has specified a time zone that does not use a seasonal time
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adjustment, then the value is constant through time.
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If the operating system doesn't supply all the information necessary to
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compute the value, the unknown elements of the list are @code{nil}.
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The argument @var{time}, if given, specifies a time value to
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analyze instead of the current time. The optional argument @var{zone}
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defaults to the current time zone rule.
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@end defun
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@node Time Zone Rules
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@section Time Zone Rules
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@cindex time zone rules
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@vindex TZ, environment variable
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The default time zone is determined by the @env{TZ} environment
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@ -1324,6 +1308,15 @@ to default to Universal Time with @code{(setenv "TZ" "UTC0")}. If
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@env{TZ} is not in the environment, Emacs uses system wall clock time,
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which is a platform-dependent default time zone.
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The set of supported @env{TZ} strings is system-dependent. GNU and
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many other systems support the tzdata database, e.g.,
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@samp{"America/New_York"} specifies the time zone and daylight saving
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time history for locations near New York City. GNU and most other
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systems support POSIX-style @env{TZ} strings, e.g.,
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@samp{"EST+5EDT,M4.1.0/2,M10.5.0/2"} specifies the rules used in New
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York from 1987 through 2006. All systems support the string
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@samp{"UTC0"} meaning Universal Time.
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@cindex time zone rule
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Functions that convert to and from local time accept an optional
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@dfn{time zone rule} argument, which specifies the conversion's time
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@ -1334,6 +1327,29 @@ If it is @code{t}, the conversion uses Universal Time. If it is
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a string, the conversion uses the time zone rule equivalent to setting
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@env{TZ} to that string.
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@defun current-time-zone &optional time zone
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@cindex time zone, current
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This function returns a list describing the time zone that the user is
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in.
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The value has the form @code{(@var{offset} @var{abbr})}. Here
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@var{offset} is an integer giving the number of seconds ahead of Universal Time
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(east of Greenwich). A negative value means west of Greenwich. The
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second element, @var{abbr}, is a string giving an abbreviation for the
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time zone, e.g., @samp{"CST"} for China Standard Time or for
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U.S. Central Standard Time. Both elements can change when daylight
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saving time begins or ends; if the user has specified a time zone that
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does not use a seasonal time adjustment, then the value is constant
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through time.
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If the operating system doesn't supply all the information necessary to
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compute the value, the unknown elements of the list are @code{nil}.
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The argument @var{time}, if given, specifies a time value to
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analyze instead of the current time. The optional argument @var{zone}
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defaults to the current time zone rule.
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@end defun
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@node Time Conversion
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@section Time Conversion
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@cindex calendrical information
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@ -1358,8 +1374,8 @@ as traditional Gregorian years do; for example, the year number
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@defun decode-time &optional time zone
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This function converts a time value into calendrical information. If
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you don't specify @var{time}, it decodes the current time, and similarly
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@var{zone} defaults to the current time zone rule. The return
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value is a list of nine elements, as follows:
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@var{zone} defaults to the current time zone rule. @xref{Time Zone Rules}.
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The return value is a list of nine elements, as follows:
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@example
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(@var{seconds} @var{minutes} @var{hour} @var{day} @var{month} @var{year} @var{dow} @var{dst} @var{utcoff})
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@ -1406,6 +1422,7 @@ to stand for years above 1900, or years above 2000, you must alter them
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yourself before you call @code{encode-time}.
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The optional argument @var{zone} defaults to the current time zone rule.
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@xref{Time Zone Rules}.
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In addition to the usual time zone rule values, it can also be a list
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(as you would get from @code{current-time-zone}) or an integer (as
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from @code{decode-time}), applied without any further alteration for
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@ -1449,8 +1466,8 @@ corresponding time value.
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This function converts @var{time} (or the current time, if
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@var{time} is omitted) to a string according to
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@var{format-string}. The conversion uses the time zone rule @var{zone}
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(or the current time zone rule, if omitted). The argument
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@var{format-string}. The conversion uses the time zone rule @var{zone}, which
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defaults to the current time zone rule. @xref{Time Zone Rules}. The argument
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@var{format-string} may contain @samp{%}-sequences which say to
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substitute parts of the time. Here is a table of what the
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@samp{%}-sequences mean:
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10
etc/NEWS
10
etc/NEWS
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@ -2125,11 +2125,11 @@ quotation marks.
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*** Time conversion functions now accept an optional ZONE argument
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that specifies the time zone rules for conversion. ZONE is omitted or
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nil for Emacs local time, t for Universal Time, 'wall' for system wall
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clock time, or a string as in 'set-time-zone-rule' for a time zone
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rule. The affected functions are 'current-time-string',
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'current-time-zone', 'decode-time', and 'format-time-string'. The
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function 'encode-time', which already accepted a simple time zone rule
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argument, has been extended to accept all the new forms.
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clock time, or a string as in the TZ environment variable. The
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affected functions are 'current-time-string', 'current-time-zone',
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'decode-time', and 'format-time-string'. The function 'encode-time',
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which already accepted a simple time zone rule argument, has been
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extended to accept all the new forms.
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*** Incompatible change in the third argument of 'format-time-string'.
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Previously, any non-nil argument was interpreted as specifying Universal Time.
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@ -2181,11 +2181,11 @@ month names with consistent widths for some locales on some versions
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of Windows. This is caused by a deficiency in the underlying system
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library function.
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** Problems with set-time-zone-rule function
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** Non-US time zones.
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The function set-time-zone-rule gives incorrect results for many
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non-US timezones. This is due to over-simplistic handling of
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daylight savings switchovers by the Windows libraries.
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Many non-US time zones are implemented incorrectly. This is due to
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over-simplistic handling of daylight savings switchovers by the
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Windows libraries.
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** Files larger than 4GB report wrong size in a 32-bit Windows build
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@ -173,7 +173,7 @@ delta. At present, delta = 0.01 degrees, so the value of the variable
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;;; End of user options.
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(defvar solar-sidereal-time-greenwich-midnight nil
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"Sidereal time at Greenwich at midnight (universal time).")
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"Sidereal time at Greenwich at midnight (Universal Time).")
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(defvar solar-northern-spring-or-summer-season nil
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"Non-nil if northern spring or summer and nil otherwise.
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@ -413,8 +413,8 @@ Result is in days. For the years 1800-1987, the maximum error is
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(defun solar-ephemeris-time (time)
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"Ephemeris Time at moment TIME.
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TIME is a pair with the first component being the number of Julian centuries
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elapsed at 0 Universal Time, and the second component being the universal
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time. For instance, the pair corresponding to November 28, 1995 at 16 UT is
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elapsed at 0 Universal Time, and the second component counting Universal Time
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hours. For instance, the pair corresponding to November 28, 1995 at 16 UT is
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\(-0.040945 16), -0.040945 being the number of Julian centuries elapsed between
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Jan 1, 2000 at 12 UT and November 28, 1995 at 0 UT.
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@ -430,7 +430,7 @@ Result is in Julian centuries of ephemeris time."
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"Right ascension (in hours) and declination (in degrees) of the sun at TIME.
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TIME is a pair with the first component being the number of
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Julian centuries elapsed at 0 Universal Time, and the second
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component being the universal time. For instance, the pair
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component counting Universal Time hours. For instance, the pair
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corresponding to November 28, 1995 at 16 UT is (-0.040945 16),
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-0.040945 being the number of Julian centuries elapsed between
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Jan 1, 2000 at 12 UT and November 28, 1995 at 0 UT. SUNRISE-FLAG is passed
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@ -444,7 +444,7 @@ to `solar-ecliptic-coordinates'."
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"Azimuth and height of the sun at TIME, LATITUDE, and LONGITUDE.
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TIME is a pair with the first component being the number of
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Julian centuries elapsed at 0 Universal Time, and the second
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component being the universal time. For instance, the pair
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component counting Universal Time hours. For instance, the pair
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corresponding to November 28, 1995 at 16 UT is (-0.040945 16),
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-0.040945 being the number of Julian centuries elapsed between
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Jan 1, 2000 at 12 UT and November 28, 1995 at 0 UT. SUNRISE-FLAG
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@ -476,8 +476,8 @@ Sunrise if DIRECTION =-1 or sunset if =1 at LATITUDE, LONGITUDE, with midday
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being TIME.
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TIME is a pair with the first component being the number of Julian centuries
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elapsed at 0 Universal Time, and the second component being the universal
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time. For instance, the pair corresponding to November 28, 1995 at 16 UT is
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elapsed at 0 Universal Time, and the second component counting Universal Time
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hours. For instance, the pair corresponding to November 28, 1995 at 16 UT is
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\(-0.040945 16), -0.040945 being the number of Julian centuries elapsed between
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Jan 1, 2000 at 12 UT and November 28, 1995 at 0 UT.
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@ -522,8 +522,8 @@ Uses binary search."
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Parameters are the midday TIME and the LATITUDE, LONGITUDE of the location.
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TIME is a pair with the first component being the number of Julian centuries
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elapsed at 0 Universal Time, and the second component being the universal
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time. For instance, the pair corresponding to November 28, 1995 at 16 UT is
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elapsed at 0 Universal Time, and the second component counting Universal Time
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hours. For instance, the pair corresponding to November 28, 1995 at 16 UT is
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\(-0.040945 16), -0.040945 being the number of Julian centuries elapsed between
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Jan 1, 2000 at 12 UT and November 28, 1995 at 0 UT.
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|
|
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@ -251,9 +251,22 @@ If a buffer is visiting the desired autoload file, return it."
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(enable-local-eval nil))
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;; We used to use `raw-text' to read this file, but this causes
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;; problems when the file contains non-ASCII characters.
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(let ((delay-mode-hooks t))
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(find-file-noselect
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(autoload-ensure-default-file (autoload-generated-file))))))
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(let* ((delay-mode-hooks t)
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(file (autoload-generated-file))
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(file-missing (not (file-exists-p file))))
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(when file-missing
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(autoload-ensure-default-file file))
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(with-current-buffer
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(find-file-noselect
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(autoload-ensure-file-writeable
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file))
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;; block backups when the file has just been created, since
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;; the backups will just be the auto-generated headers.
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;; bug#23203
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(when file-missing
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(setq buffer-backed-up t)
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(save-buffer))
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(current-buffer)))))
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(defun autoload-generated-file ()
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(expand-file-name generated-autoload-file
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|
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@ -374,21 +387,22 @@ not be relied upon."
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;;;###autoload
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(put 'autoload-ensure-writable 'risky-local-variable t)
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(defun autoload-ensure-file-writeable (file)
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;; Probably pointless, but replaces the old AUTOGEN_VCS in lisp/Makefile,
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;; which was designed to handle CVSREAD=1 and equivalent.
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(and autoload-ensure-writable
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(let ((modes (file-modes file)))
|
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(if (zerop (logand modes #o0200))
|
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;; Ignore any errors here, and let subsequent attempts
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;; to write the file raise any real error.
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(ignore-errors (set-file-modes file (logior modes #o0200))))))
|
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file)
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(defun autoload-ensure-default-file (file)
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"Make sure that the autoload file FILE exists, creating it if needed.
|
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If the file already exists and `autoload-ensure-writable' is non-nil,
|
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make it writable."
|
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(if (file-exists-p file)
|
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;; Probably pointless, but replaces the old AUTOGEN_VCS in lisp/Makefile,
|
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;; which was designed to handle CVSREAD=1 and equivalent.
|
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(and autoload-ensure-writable
|
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(let ((modes (file-modes file)))
|
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(if (zerop (logand modes #o0200))
|
||||
;; Ignore any errors here, and let subsequent attempts
|
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;; to write the file raise any real error.
|
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(ignore-errors (set-file-modes file (logior modes #o0200))))))
|
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(write-region (autoload-rubric file) nil file))
|
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file)
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(write-region (autoload-rubric file) nil file))
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|
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(defun autoload-insert-section-header (outbuf autoloads load-name file time)
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"Insert the section-header line,
|
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|
|
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|||
|
|
@ -1009,7 +1009,7 @@ on parts -- for instance, adding Vcard info to a database."
|
|||
|
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(defcustom gnus-article-date-headers '(combined-lapsed)
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"A list of Date header formats to display.
|
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Valid formats are `ut' (universal time), `local' (local time
|
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Valid formats are `ut' (Universal Time), `local' (local time
|
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zone), `english' (readable English), `lapsed' (elapsed time),
|
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`combined-lapsed' (both the original date and the elapsed time),
|
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`original' (the original date header), `iso8601' (ISO8601
|
||||
|
|
|
|||
|
|
@ -22674,7 +22674,7 @@ time-range, if possible.
|
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|
||||
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."
|
||||
(format-time-string
|
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format
|
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(apply 'encode-time
|
||||
|
|
|
|||
|
|
@ -162,7 +162,7 @@ end it with `/'. DIR must be one of `project-roots' or
|
|||
DIRS is a list of absolute directories; it should be some
|
||||
subset of the project roots and external roots.
|
||||
|
||||
The default implementation uses `find-program'. PROJECT is used
|
||||
The default implementation uses `grep-find-program'. PROJECT is used
|
||||
to find the list of ignores for each directory."
|
||||
;; FIXME: Uniquely abbreviate the roots?
|
||||
(require 'xref)
|
||||
|
|
@ -171,7 +171,7 @@ to find the list of ignores for each directory."
|
|||
(lambda (dir)
|
||||
(let ((command
|
||||
(format "%s %s %s -type f -print0"
|
||||
find-program
|
||||
grep-find-program
|
||||
dir
|
||||
(xref--find-ignores-arguments
|
||||
(project-ignores project dir)
|
||||
|
|
|
|||
|
|
@ -583,10 +583,9 @@ Compatibility function for \\[next-error] invocations."
|
|||
;; called add-log-time-zone-rule since it's only used from add-log-* code.
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||||
(defvaralias 'change-log-time-zone-rule 'add-log-time-zone-rule)
|
||||
(defvar add-log-time-zone-rule nil
|
||||
"Time zone used for calculating change log time stamps.
|
||||
It takes the same format as the TZ argument of `set-time-zone-rule'.
|
||||
If nil, use local time.
|
||||
If t, use universal time.")
|
||||
"Time zone rule used for calculating change log time stamps.
|
||||
If nil, use local time. If t, use Universal Time.
|
||||
If a string, interpret as the ZONE argument of `format-time-string'.")
|
||||
(put 'add-log-time-zone-rule 'safe-local-variable
|
||||
(lambda (x) (or (booleanp x) (stringp x))))
|
||||
|
||||
|
|
|
|||
|
|
@ -1969,10 +1969,10 @@ DEFUN ("format-time-string", Fformat_time_string, Sformat_time_string, 1, 3, 0,
|
|||
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:
|
||||
|
||||
|
|
@ -2087,7 +2087,7 @@ as from `current-time' and `file-attributes', or nil to use the
|
|||
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
|
||||
|
|
@ -2152,9 +2152,9 @@ DEFUN ("encode-time", Fencode_time, Sencode_time, 6, MANY, 0,
|
|||
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.
|
||||
|
|
@ -2214,7 +2214,7 @@ but this is considered obsolete.
|
|||
|
||||
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);
|
||||
|
|
@ -2291,7 +2291,7 @@ instead of using the current time. The argument should have the form
|
|||
`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
|
||||
|
|
@ -2332,8 +2332,11 @@ the data it can't find. */)
|
|||
|
||||
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
|
||||
|
|
|
|||
|
|
@ -2373,9 +2373,9 @@ So we use CTFontDescriptorCreateMatchingFontDescriptor (no
|
|||
!= (spacing >= FONT_SPACING_MONO)))
|
||||
continue;
|
||||
|
||||
/* Don't use a color bitmap font unless its family is
|
||||
explicitly specified. */
|
||||
if ((sym_traits & kCTFontTraitColorGlyphs) && NILP (family))
|
||||
/* Don't use a color bitmap font until it is supported on
|
||||
free platforms. */
|
||||
if (sym_traits & kCTFontTraitColorGlyphs)
|
||||
continue;
|
||||
|
||||
if (j > 0
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue