#----------------------------------------------------------------------
#
# clock.tcl --
#
# This file implements the portions of the [clock] ensemble that are
# coded in Tcl. Refer to the users' manual to see the description of
# the [clock] command and its subcommands.
#
#
#----------------------------------------------------------------------
#
# Copyright (c) 2004,2005,2006,2007 by Kevin B. Kenny
# See the file "license.terms" for information on usage and redistribution
# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
#
#----------------------------------------------------------------------
# We must have message catalogs that support the root locale, and we need
# access to the Registry on Windows systems.
uplevel \#0 {
package require msgcat 1.6
if { $::tcl_platform(platform) eq {windows} } {
if { [catch { package require registry 1.1 }] } {
namespace eval ::tcl::clock [list variable NoRegistry {}]
}
}
}
# Put the library directory into the namespace for the ensemble so that the
# library code can find message catalogs and time zone definition files.
namespace eval ::tcl::clock \
[list variable LibDir [file dirname [info script]]]
#----------------------------------------------------------------------
#
# clock --
#
# Manipulate times.
#
# The 'clock' command manipulates time. Refer to the user documentation for
# the available subcommands and what they do.
#
#----------------------------------------------------------------------
namespace eval ::tcl::clock {
# Export the subcommands
namespace export format
namespace export clicks
namespace export microseconds
namespace export milliseconds
namespace export scan
namespace export seconds
namespace export add
# Import the message catalog commands that we use.
namespace import ::msgcat::mcload
namespace import ::msgcat::mclocale
namespace import ::msgcat::mc
namespace import ::msgcat::mcpackagelocale
}
#----------------------------------------------------------------------
#
# ::tcl::clock::Initialize --
#
# Finish initializing the 'clock' subsystem
#
# Results:
# None.
#
# Side effects:
# Namespace variable in the 'clock' subsystem are initialized.
#
# The '::tcl::clock::Initialize' procedure initializes the namespace variables
# and root locale message catalog for the 'clock' subsystem. It is broken
# into a procedure rather than simply evaluated as a script so that it will be
# able to use local variables, avoiding the dangers of 'creative writing' as
# in Bug 1185933.
#
#----------------------------------------------------------------------
proc ::tcl::clock::Initialize {} {
rename ::tcl::clock::Initialize {}
variable LibDir
# Define the Greenwich time zone
proc InitTZData {} {
variable TZData
array unset TZData
set TZData(:Etc/GMT) {
{-9223372036854775808 0 0 GMT}
}
set TZData(:GMT) $TZData(:Etc/GMT)
set TZData(:Etc/UTC) {
{-9223372036854775808 0 0 UTC}
}
set TZData(:UTC) $TZData(:Etc/UTC)
set TZData(:localtime) {}
}
InitTZData
mcpackagelocale set {}
::msgcat::mcpackageconfig set mcfolder [file join $LibDir msgs]
::msgcat::mcpackageconfig set unknowncmd ""
::msgcat::mcpackageconfig set changecmd ChangeCurrentLocale
# Define the message catalog for the root locale.
::msgcat::mcmset {} {
AM {am}
BCE {B.C.E.}
CE {C.E.}
DATE_FORMAT {%m/%d/%Y}
DATE_TIME_FORMAT {%a %b %e %H:%M:%S %Y}
DAYS_OF_WEEK_ABBREV {
Sun Mon Tue Wed Thu Fri Sat
}
DAYS_OF_WEEK_FULL {
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
}
GREGORIAN_CHANGE_DATE 2299161
LOCALE_DATE_FORMAT {%m/%d/%Y}
LOCALE_DATE_TIME_FORMAT {%a %b %e %H:%M:%S %Y}
LOCALE_ERAS {}
LOCALE_NUMERALS {
00 01 02 03 04 05 06 07 08 09
10 11 12 13 14 15 16 17 18 19
20 21 22 23 24 25 26 27 28 29
30 31 32 33 34 35 36 37 38 39
40 41 42 43 44 45 46 47 48 49
50 51 52 53 54 55 56 57 58 59
60 61 62 63 64 65 66 67 68 69
70 71 72 73 74 75 76 77 78 79
80 81 82 83 84 85 86 87 88 89
90 91 92 93 94 95 96 97 98 99
}
LOCALE_TIME_FORMAT {%H:%M:%S}
LOCALE_YEAR_FORMAT {%EC%Ey}
MONTHS_ABBREV {
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
}
MONTHS_FULL {
January February March
April May June
July August September
October November December
}
PM {pm}
TIME_FORMAT {%H:%M:%S}
TIME_FORMAT_12 {%I:%M:%S %P}
TIME_FORMAT_24 {%H:%M}
TIME_FORMAT_24_SECS {%H:%M:%S}
}
# Define a few Gregorian change dates for other locales. In most cases
# the change date follows a language, because a nation's colonies changed
# at the same time as the nation itself. In many cases, different
# national boundaries existed; the dominating rule is to follow the
# nation's capital.
# Italy, Spain, Portugal, Poland
::msgcat::mcset it GREGORIAN_CHANGE_DATE 2299161
::msgcat::mcset es GREGORIAN_CHANGE_DATE 2299161
::msgcat::mcset pt GREGORIAN_CHANGE_DATE 2299161
::msgcat::mcset pl GREGORIAN_CHANGE_DATE 2299161
# France, Austria
::msgcat::mcset fr GREGORIAN_CHANGE_DATE 2299227
# For Belgium, we follow Southern Netherlands; Liege Diocese changed
# several weeks later.
::msgcat::mcset fr_BE GREGORIAN_CHANGE_DATE 2299238
::msgcat::mcset nl_BE GREGORIAN_CHANGE_DATE 2299238
# Austria
::msgcat::mcset de_AT GREGORIAN_CHANGE_DATE 2299527
# Hungary
::msgcat::mcset hu GREGORIAN_CHANGE_DATE 2301004
# Germany, Norway, Denmark (Catholic Germany changed earlier)
::msgcat::mcset de_DE GREGORIAN_CHANGE_DATE 2342032
::msgcat::mcset nb GREGORIAN_CHANGE_DATE 2342032
::msgcat::mcset nn GREGORIAN_CHANGE_DATE 2342032
::msgcat::mcset no GREGORIAN_CHANGE_DATE 2342032
::msgcat::mcset da GREGORIAN_CHANGE_DATE 2342032
# Holland (Brabant, Gelderland, Flanders, Friesland, etc. changed at
# various times)
::msgcat::mcset nl GREGORIAN_CHANGE_DATE 2342165
# Protestant Switzerland (Catholic cantons changed earlier)
::msgcat::mcset fr_CH GREGORIAN_CHANGE_DATE 2361342
::msgcat::mcset it_CH GREGORIAN_CHANGE_DATE 2361342
::msgcat::mcset de_CH GREGORIAN_CHANGE_DATE 2361342
# English speaking countries
::msgcat::mcset en GREGORIAN_CHANGE_DATE 2361222
# Sweden (had several changes onto and off of the Gregorian calendar)
::msgcat::mcset sv GREGORIAN_CHANGE_DATE 2361390
# Russia
::msgcat::mcset ru GREGORIAN_CHANGE_DATE 2421639
# Romania (Transylvania changed earler - perhaps de_RO should show the
# earlier date?)
::msgcat::mcset ro GREGORIAN_CHANGE_DATE 2422063
# Greece
::msgcat::mcset el GREGORIAN_CHANGE_DATE 2423480
#------------------------------------------------------------------
#
# CONSTANTS
#
#------------------------------------------------------------------
# Paths at which binary time zone data for the Olson libraries are known
# to reside on various operating systems
variable ZoneinfoPaths {}
foreach path {
/usr/share/zoneinfo
/usr/share/lib/zoneinfo
/usr/lib/zoneinfo
/usr/local/etc/zoneinfo
} {
if { [file isdirectory $path] } {
lappend ZoneinfoPaths $path
}
}
# Define the directories for time zone data and message catalogs.
variable DataDir [file join $LibDir tzdata]
# Number of days in the months, in common years and leap years.
variable DaysInRomanMonthInCommonYear \
{ 31 28 31 30 31 30 31 31 30 31 30 31 }
variable DaysInRomanMonthInLeapYear \
{ 31 29 31 30 31 30 31 31 30 31 30 31 }
variable DaysInPriorMonthsInCommonYear [list 0]
variable DaysInPriorMonthsInLeapYear [list 0]
set i 0
foreach j $DaysInRomanMonthInCommonYear {
lappend DaysInPriorMonthsInCommonYear [incr i $j]
}
set i 0
foreach j $DaysInRomanMonthInLeapYear {
lappend DaysInPriorMonthsInLeapYear [incr i $j]
}
# Another epoch (Hi, Jeff!)
variable Roddenberry 1946
# Integer ranges
variable MINWIDE -9223372036854775808
variable MAXWIDE 9223372036854775807
# Day before Leap Day
variable FEB_28 58
# Translation table to map Windows TZI onto cities, so that the Olson
# rules can apply. In some cases the mapping is ambiguous, so it's wise
# to specify $::env(TCL_TZ) rather than simply depending on the system
# time zone.
# The keys are long lists of values obtained from the time zone
# information in the Registry. In order, the list elements are:
# Bias StandardBias DaylightBias
# StandardDate.wYear StandardDate.wMonth StandardDate.wDayOfWeek
# StandardDate.wDay StandardDate.wHour StandardDate.wMinute
# StandardDate.wSecond StandardDate.wMilliseconds
# DaylightDate.wYear DaylightDate.wMonth DaylightDate.wDayOfWeek
# DaylightDate.wDay DaylightDate.wHour DaylightDate.wMinute
# DaylightDate.wSecond DaylightDate.wMilliseconds
# The values are the names of time zones where those rules apply. There
# is considerable ambiguity in certain zones; an attempt has been made to
# make a reasonable guess, but this table needs to be taken with a grain
# of salt.
variable WinZoneInfo [dict create {*}{
{-43200 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0} :Pacific/Kwajalein
{-39600 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0} :Pacific/Midway
{-36000 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0} :Pacific/Honolulu
{-32400 0 3600 0 11 0 1 2 0 0 0 0 3 0 2 2 0 0 0} :America/Anchorage
{-28800 0 3600 0 11 0 1 2 0 0 0 0 3 0 2 2 0 0 0} :America/Los_Angeles
{-28800 0 3600 0 10 0 5 2 0 0 0 0 4 0 1 2 0 0 0} :America/Tijuana
{-25200 0 3600 0 11 0 1 2 0 0 0 0 3 0 2 2 0 0 0} :America/Denver
{-25200 0 3600 0 10 0 5 2 0 0 0 0 4 0 1 2 0 0 0} :America/Chihuahua
{-25200 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0} :America/Phoenix
{-21600 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0} :America/Regina
{-21600 0 3600 0 11 0 1 2 0 0 0 0 3 0 2 2 0 0 0} :America/Chicago
{-21600 0 3600 0 10 0 5 2 0 0 0 0 4 0 1 2 0 0 0} :America/Mexico_City
{-18000 0 3600 0 11 0 1 2 0 0 0 0 3 0 2 2 0 0 0} :America/New_York
{-18000 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0} :America/Indianapolis
{-14400 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0} :America/Caracas
{-14400 0 3600 0 3 6 2 23 59 59 999 0 10 6 2 23 59 59 999}
:America/Santiago
{-14400 0 3600 0 2 0 5 2 0 0 0 0 11 0 1 2 0 0 0} :America/Manaus
{-14400 0 3600 0 11 0 1 2 0 0 0 0 3 0 2 2 0 0 0} :America/Halifax
{-12600 0 3600 0 10 0 5 2 0 0 0 0 4 0 1 2 0 0 0} :America/St_Johns
{-10800 0 3600 0 2 0 2 2 0 0 0 0 10 0 3 2 0 0 0} :America/Sao_Paulo
{-10800 0 3600 0 10 0 5 2 0 0 0 0 4 0 1 2 0 0 0} :America/Godthab
{-10800 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0} :America/Buenos_Aires
{-10800 0 3600 0 2 0 5 2 0 0 0 0 11 0 1 2 0 0 0} :America/Bahia
{-10800 0 3600 0 3 0 2 2 0 0 0 0 10 0 1 2 0 0 0} :America/Montevideo
{-7200 0 3600 0 9 0 5 2 0 0 0 0 3 0 5 2 0 0 0} :America/Noronha
{-3600 0 3600 0 10 0 5 3 0 0 0 0 3 0 5 2 0 0 0} :Atlantic/Azores
{-3600 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0} :Atlantic/Cape_Verde
{0 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0} :UTC
{0 0 3600 0 10 0 5 2 0 0 0 0 3 0 5 1 0 0 0} :Europe/London
{3600 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0} :Africa/Kinshasa
{3600 0 3600 0 10 0 5 3 0 0 0 0 3 0 5 2 0 0 0} :CET
{7200 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0} :Africa/Harare
{7200 0 3600 0 9 4 5 23 59 59 0 0 4 4 5 23 59 59 0}
:Africa/Cairo
{7200 0 3600 0 10 0 5 4 0 0 0 0 3 0 5 3 0 0 0} :Europe/Helsinki
{7200 0 3600 0 9 0 3 2 0 0 0 0 3 5 5 2 0 0 0} :Asia/Jerusalem
{7200 0 3600 0 9 0 5 1 0 0 0 0 3 0 5 0 0 0 0} :Europe/Bucharest
{7200 0 3600 0 10 0 5 3 0 0 0 0 3 0 5 2 0 0 0} :Europe/Athens
{7200 0 3600 0 9 5 5 1 0 0 0 0 3 4 5 0 0 0 0} :Asia/Amman
{7200 0 3600 0 10 6 5 23 59 59 999 0 3 0 5 0 0 0 0}
:Asia/Beirut
{7200 0 -3600 0 4 0 1 2 0 0 0 0 9 0 1 2 0 0 0} :Africa/Windhoek
{10800 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0} :Asia/Riyadh
{10800 0 3600 0 10 0 1 4 0 0 0 0 4 0 1 3 0 0 0} :Asia/Baghdad
{10800 0 3600 0 10 0 5 3 0 0 0 0 3 0 5 2 0 0 0} :Europe/Moscow
{12600 0 3600 0 9 2 4 2 0 0 0 0 3 0 1 2 0 0 0} :Asia/Tehran
{14400 0 3600 0 10 0 5 5 0 0 0 0 3 0 5 4 0 0 0} :Asia/Baku
{14400 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0} :Asia/Muscat
{14400 0 3600 0 10 0 5 3 0 0 0 0 3 0 5 2 0 0 0} :Asia/Tbilisi
{16200 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0} :Asia/Kabul
{18000 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0} :Asia/Karachi
{18000 0 3600 0 10 0 5 3 0 0 0 0 3 0 5 2 0 0 0} :Asia/Yekaterinburg
{19800 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0} :Asia/Calcutta
{20700 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0} :Asia/Katmandu
{21600 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0} :Asia/Dhaka
{21600 0 3600 0 10 0 5 3 0 0 0 0 3 0 5 2 0 0 0} :Asia/Novosibirsk
{23400 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0} :Asia/Rangoon
{25200 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0} :Asia/Bangkok
{25200 0 3600 0 10 0 5 3 0 0 0 0 3 0 5 2 0 0 0} :Asia/Krasnoyarsk
{28800 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0} :Asia/Chongqing
{28800 0 3600 0 10 0 5 3 0 0 0 0 3 0 5 2 0 0 0} :Asia/Irkutsk
{32400 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0} :Asia/Tokyo
{32400 0 3600 0 10 0 5 3 0 0 0 0 3 0 5 2 0 0 0} :Asia/Yakutsk
{34200 0 3600 0 3 0 5 3 0 0 0 0 10 0 5 2 0 0 0} :Australia/Adelaide
{34200 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0} :Australia/Darwin
{36000 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0} :Australia/Brisbane
{36000 0 3600 0 10 0 5 3 0 0 0 0 3 0 5 2 0 0 0} :Asia/Vladivostok
{36000 0 3600 0 3 0 5 3 0 0 0 0 10 0 1 2 0 0 0} :Australia/Hobart
{36000 0 3600 0 3 0 5 3 0 0 0 0 10 0 5 2 0 0 0} :Australia/Sydney
{39600 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0} :Pacific/Noumea
{43200 0 3600 0 3 0 3 3 0 0 0 0 10 0 1 2 0 0 0} :Pacific/Auckland
{43200 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0} :Pacific/Fiji
{46800 0 3600 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0} :Pacific/Tongatapu
}]
# Groups of fields that specify the date, priorities, and code bursts that
# determine Julian Day Number given those groups. The code in [clock
# scan] will choose the highest priority (lowest numbered) set of fields
# that determines the date.
variable DateParseActions {
{ seconds } 0 {}
{ julianDay } 1 {}
{ era century yearOfCentury month dayOfMonth } 2 {
dict set date year [expr { 100 * [dict get $date century]
+ [dict get $date yearOfCentury] }]
set date [GetJulianDayFromEraYearMonthDay $date[set date {}] \
$changeover]
}
{ era century yearOfCentury dayOfYear } 2 {
dict set date year [expr { 100 * [dict get $date century]
+ [dict get $date yearOfCentury] }]
set date [GetJulianDayFromEraYearDay $date[set date {}] \
$changeover]
}
{ century yearOfCentury month dayOfMonth } 3 {
dict set date era CE
dict set date year [expr { 100 * [dict get $date century]
+ [dict get $date yearOfCentury] }]
set date [GetJulianDayFromEraYearMonthDay $date[set date {}] \
$changeover]
}
{ century yearOfCentury dayOfYear } 3 {
dict set date era CE
dict set date year [expr { 100 * [dict get $date century]
+ [dict get $date yearOfCentury] }]
set date [GetJulianDayFromEraYearDay $date[set date {}] \
$changeover]
}
{ iso8601Century iso8601YearOfCentury iso8601Week dayOfWeek } 3 {
dict set date era CE
dict set date iso8601Year \
[expr { 100 * [dict get $date iso8601Century]
+ [dict get $date iso8601YearOfCentury] }]
set date [GetJulianDayFromEraYearWeekDay $date[set date {}] \
$changeover]
}
{ yearOfCentury month dayOfMonth } 4 {
set date [InterpretTwoDigitYear $date[set date {}] $baseTime]
dict set date era CE
set date [GetJulianDayFromEraYearMonthDay $date[set date {}] \
$changeover]
}
{ yearOfCentury dayOfYear } 4 {
set date [InterpretTwoDigitYear $date[set date {}] $baseTime]
dict set date era CE
set date [GetJulianDayFromEraYearDay $date[set date {}] \
$changeover]
}
{ iso8601YearOfCentury iso8601Week dayOfWeek } 4 {
set date [InterpretTwoDigitYear \
$date[set date {}] $baseTime \
iso8601YearOfCentury iso8601Year]
dict set date era CE
set date [GetJulianDayFromEraYearWeekDay $date[set date {}] \
$changeover]
}
{ month dayOfMonth } 5 {
set date [AssignBaseYear $date[set date {}] \
$baseTime $timeZone $changeover]
set date [GetJulianDayFromEraYearMonthDay $date[set date {}] \
$changeover]
}
{ dayOfYear } 5 {
set date [AssignBaseYear $date[set date {}] \
$baseTime $timeZone $changeover]
set date [GetJulianDayFromEraYearDay $date[set date {}] \
$changeover]
}
{ iso8601Week dayOfWeek } 5 {
set date [AssignBaseIso8601Year $date[set date {}] \
$baseTime $timeZone $changeover]
set date [GetJulianDayFromEraYearWeekDay $date[set date {}] \
$changeover]
}
{ dayOfMonth } 6 {
set date [AssignBaseMonth $date[set date {}] \
$baseTime $timeZone $changeover]
set date [GetJulianDayFromEraYearMonthDay $date[set date {}] \
$changeover]
}
{ dayOfWeek } 7 {
set date [AssignBaseWeek $date[set date {}] \
$baseTime $timeZone $changeover]
set date [GetJulianDayFromEraYearWeekDay $date[set date {}] \
$changeover]
}
{} 8 {
set date [AssignBaseJulianDay $date[set date {}] \
$baseTime $timeZone $changeover]
}
}
# Groups of fields that specify time of day, priorities, and code that
# processes them
variable TimeParseActions {
seconds 1 {}
{ hourAMPM minute second amPmIndicator } 2 {
dict set date secondOfDay [InterpretHMSP $date]
}
{ hour minute second } 2 {
dict set date secondOfDay [InterpretHMS $date]
}
{ hourAMPM minute amPmIndicator } 3 {
dict set date second 0
dict set date secondOfDay [InterpretHMSP $date]
}
{ hour minute } 3 {
dict set date second 0
dict set date secondOfDay [InterpretHMS $date]
}
{ hourAMPM amPmIndicator } 4 {
dict set date minute 0
dict set date second 0
dict set date secondOfDay [InterpretHMSP $date]
}
{ hour } 4 {
dict set date minute 0
dict set date second 0
dict set date secondOfDay [InterpretHMS $date]
}
{ } 5 {
dict set date secondOfDay 0
}
}
# Legacy time zones, used primarily for parsing RFC822 dates.
variable LegacyTimeZone [dict create \
gmt +0000 \
ut +0000 \
utc +0000 \
bst +0100 \
wet +0000 \
wat -0100 \
at -0200 \
nft -0330 \
nst -0330 \
ndt -0230 \
ast -0400 \
adt -0300 \
est -0500 \
edt -0400 \
cst -0600 \
cdt -0500 \
mst -0700 \
mdt -0600 \
pst -0800 \
pdt -0700 \
yst -0900 \
ydt -0800 \
hst -1000 \
hdt -0900 \
cat -1000 \
ahst -1000 \
nt -1100 \
idlw -1200 \
cet +0100 \
cest +0200 \
met +0100 \
mewt +0100 \
mest +0200 \
swt +0100 \
sst +0200 \
fwt +0100 \
fst +0200 \
eet +0200 \
eest +0300 \
bt +0300 \
it +0330 \
zp4 +0400 \
zp5 +0500 \
ist +0530 \
zp6 +0600 \
wast +0700 \
wadt +0800 \
jt +0730 \
cct +0800 \
jst +0900 \
kst +0900 \
cast +0930 \
jdt +1000 \
kdt +1000 \
cadt +1030 \
east +1000 \
eadt +1030 \
gst +1000 \
nzt +1200 \
nzst +1200 \
nzdt +1300 \
idle +1200 \
a +0100 \
b +0200 \
c +0300 \
d +0400 \
e +0500 \
f +0600 \
g +0700 \
h +0800 \
i +0900 \
k +1000 \
l +1100 \
m +1200 \
n -0100 \
o -0200 \
p -0300 \
q -0400 \
r -0500 \
s -0600 \
t -0700 \
u -0800 \
v -0900 \
w -1000 \
x -1100 \
y -1200 \
z +0000 \
]
# Caches
variable LocaleNumeralCache {}; # Dictionary whose keys are locale
# names and whose values are pairs
# comprising regexes matching numerals
# in the given locales and dictionaries
# mapping the numerals to their numeric
# values.
# variable CachedSystemTimeZone; # If 'CachedSystemTimeZone' exists,
# it contains the value of the
# system time zone, as determined from
# the environment.
variable TimeZoneBad {}; # Dictionary whose keys are time zone
# names and whose values are 1 if
# the time zone is unknown and 0
# if it is known.
variable TZData; # Array whose keys are time zone names
# and whose values are lists of quads
# comprising start time, UTC offset,
# Daylight Saving Time indicator, and
# time zone abbreviation.
variable FormatProc; # Array mapping format group
# and locale to the name of a procedure
# that renders the given format
}
::tcl::clock::Initialize
#----------------------------------------------------------------------
#
# clock format --
#
# Formats a count of seconds since the Posix Epoch as a time of day.
#
# The 'clock format' command formats times of day for output. Refer to the
# user documentation to see what it does.
#
#----------------------------------------------------------------------
proc ::tcl::clock::format { args } {
variable FormatProc
variable TZData
lassign [ParseFormatArgs {*}$args] format locale timezone
set locale [string tolower $locale]
set clockval [lindex $args 0]
# Get the data for time changes in the given zone
if {$timezone eq ""} {
set timezone [GetSystemTimeZone]
}
if {![info exists TZData($timezone)]} {
if {[catch {SetupTimeZone $timezone} retval opts]} {
dict unset opts -errorinfo
return -options $opts $retval
}
}
# Build a procedure to format the result. Cache the built procedure's name
# in the 'FormatProc' array to avoid losing its internal representation,
# which contains the name resolution.
set procName formatproc'$format'$locale
set procName [namespace current]::[string map {: {\:} \\ {\\}} $procName]
if {[info exists FormatProc($procName)]} {
set procName $FormatProc($procName)
} else {
set FormatProc($procName) \
[ParseClockFormatFormat $procName $format $locale]
}
return [$procName $clockval $timezone]
}
#----------------------------------------------------------------------
#
# ParseClockFormatFormat --
#
# Builds and caches a procedure that formats a time value.
#
# Parameters:
# format -- Format string to use
# locale -- Locale in which the format string is to be interpreted
#
# Results:
# Returns the name of the newly-built procedure.
#
#----------------------------------------------------------------------
proc ::tcl::clock::ParseClockFormatFormat {procName format locale} {
if {[namespace which $procName] ne {}} {
return $procName
}
# Map away the locale-dependent composite format groups
EnterLocale $locale
# Change locale if a fresh locale has been given on the command line.
try {
return [ParseClockFormatFormat2 $format $locale $procName]
} trap CLOCK {result opts} {
dict unset opts -errorinfo
return -options $opts $result
}
}
proc ::tcl::clock::ParseClockFormatFormat2 {format locale procName} {
set didLocaleEra 0
set didLocaleNumerals 0
set preFormatCode \
[string map [list @GREGORIAN_CHANGE_DATE@ \
[mc GREGORIAN_CHANGE_DATE]] \
{
variable TZData
set date [GetDateFields $clockval \
$TZData($timezone) \
@GREGORIAN_CHANGE_DATE@]
}]
set formatString {}
set substituents {}
set state {}
set format [LocalizeFormat $locale $format]
foreach char [split $format {}] {
switch -exact -- $state {
{} {
if { [string equal % $char] } {
set state percent
} else {
append formatString $char
}
}
percent { # Character following a '%' character
set state {}
switch -exact -- $char {
% { # A literal character, '%'
append formatString %%
}
a { # Day of week, abbreviated
append formatString %s
append substituents \
[string map \
[list @DAYS_OF_WEEK_ABBREV@ \
[list [mc DAYS_OF_WEEK_ABBREV]]] \
{ [lindex @DAYS_OF_WEEK_ABBREV@ \
[expr {[dict get $date dayOfWeek] \
% 7}]]}]
}
A { # Day of week, spelt out.
append formatString %s
append substituents \
[string map \
[list @DAYS_OF_WEEK_FULL@ \
[list [mc DAYS_OF_WEEK_FULL]]] \
{ [lindex @DAYS_OF_WEEK_FULL@ \
[expr {[dict get $date dayOfWeek] \
% 7}]]}]
}
b - h { # Name of month, abbreviated.
append formatString %s
append substituents \
[string map \
[list @MONTHS_ABBREV@ \
[list [mc MONTHS_ABBREV]]] \
{ [lindex @MONTHS_ABBREV@ \
[expr {[dict get $date month]-1}]]}]
}
B { # Name of month, spelt out
append formatString %s
append substituents \
[string map \
[list @MONTHS_FULL@ \
[list [mc MONTHS_FULL]]] \
{ [lindex @MONTHS_FULL@ \
[expr {[dict get $date month]-1}]]}]
}
C { # Century number
append formatString %02d
append substituents \
{ [expr {[dict get $date year] / 100}]}
}
d { # Day of month, with leading zero
append formatString %02d
append substituents { [dict get $date dayOfMonth]}
}
e { # Day of month, without leading zero
append formatString %2d
append substituents { [dict get $date dayOfMonth]}
}
E { # Format group in a locale-dependent
# alternative era
set state percentE
if {!$didLocaleEra} {
append preFormatCode \
[string map \
[list @LOCALE_ERAS@ \
[list [mc LOCALE_ERAS]]] \
{
set date [GetLocaleEra \
$date[set date {}] \
@LOCALE_ERAS@]}] \n
set didLocaleEra 1
}
if {!$didLocaleNumerals} {
append preFormatCode \
[list set localeNumerals \
[mc LOCALE_NUMERALS]] \n
set didLocaleNumerals 1
}
}
g { # Two-digit year relative to ISO8601
# week number
append formatString %02d
append substituents \
{ [expr { [dict get $date iso8601Year] % 100 }]}
}
G { # Four-digit year relative to ISO8601
# week number
append formatString %02d
append substituents { [dict get $date iso8601Year]}
}
H { # Hour in the 24-hour day, leading zero
append formatString %02d
append substituents \
{ [expr { [dict get $date localSeconds] \
/ 3600 % 24}]}
}
I { # Hour AM/PM, with leading zero
append formatString %02d
append substituents \
{ [expr { ( ( ( [dict get $date localSeconds] \
% 86400 ) \
+ 86400 \
- 3600 ) \
/ 3600 ) \
% 12 + 1 }] }
}
j { # Day of year (001-366)
append formatString %03d
append substituents { [dict get $date dayOfYear]}
}
J { # Julian Day Number
append formatString %07ld
append substituents { [dict get $date julianDay]}
}
k { # Hour (0-23), no leading zero
append formatString %2d
append substituents \
{ [expr { [dict get $date localSeconds]
/ 3600
% 24 }]}
}
l { # Hour (12-11), no leading zero
append formatString %2d
append substituents \
{ [expr { ( ( ( [dict get $date localSeconds]
% 86400 )
+ 86400
- 3600 )
/ 3600 )
% 12 + 1 }]}
}
m { # Month number, leading zero
append formatString %02d
append substituents { [dict get $date month]}
}
M { # Minute of the hour, leading zero
append formatString %02d
append substituents \
{ [expr { [dict get $date localSeconds]
/ 60
% 60 }]}
}
n { # A literal newline
append formatString \n
}
N { # Month number, no leading zero
append formatString %2d
append substituents { [dict get $date month]}
}
O { # A format group in the locale's
# alternative numerals
set state percentO
if {!$didLocaleNumerals} {
append preFormatCode \
[list set localeNumerals \
[mc LOCALE_NUMERALS]] \n
set didLocaleNumerals 1
}
}
p { # Localized 'AM' or 'PM' indicator
# converted to uppercase
append formatString %s
append preFormatCode \
[list set AM [string toupper [mc AM]]] \n \
[list set PM [string toupper [mc PM]]] \n
append substituents \
{ [expr {(([dict get $date localSeconds]
% 86400) < 43200) ?
$AM : $PM}]}
}
P { # Localized 'AM' or 'PM' indicator
append formatString %s
append preFormatCode \
[list set am [mc AM]] \n \
[list set pm [mc PM]] \n
append substituents \
{ [expr {(([dict get $date localSeconds]
% 86400) < 43200) ?
$am : $pm}]}
}
Q { # Hi, Jeff!
append formatString %s
append substituents { [FormatStarDate $date]}
}
s { # Seconds from the Posix Epoch
append formatString %s
append substituents { [dict get $date seconds]}
}
S { # Second of the minute, with
# leading zero
append formatString %02d
append substituents \
{ [expr { [dict get $date localSeconds]
% 60 }]}
}
t { # A literal tab character
append formatString \t
}
u { # Day of the week (1-Monday, 7-Sunday)
append formatString %1d
append substituents { [dict get $date dayOfWeek]}
}
U { # Week of the year (00-53). The
# first Sunday of the year is the
# first day of week 01
append formatString %02d
append preFormatCode {
set dow [dict get $date dayOfWeek]
if { $dow == 7 } {
set dow 0
}
incr dow
set UweekNumber \
[expr { ( [dict get $date dayOfYear]
- $dow + 7 )
/ 7 }]
}
append substituents { $UweekNumber}
}
V { # The ISO8601 week number
append formatString %02d
append substituents { [dict get $date iso8601Week]}
}
w { # Day of the week (0-Sunday,
# 6-Saturday)
append formatString %1d
append substituents \
{ [expr { [dict get $date dayOfWeek] % 7 }]}
}
W { # Week of the year (00-53). The first
# Monday of the year is the first day
# of week 01.
append preFormatCode {
set WweekNumber \
[expr { ( [dict get $date dayOfYear]
- [dict get $date dayOfWeek]
+ 7 )
/ 7 }]
}
append formatString %02d
append substituents { $WweekNumber}
}
y { # The two-digit year of the century
append formatString %02d
append substituents \
{ [expr { [dict get $date year] % 100 }]}
}
Y { # The four-digit year
append formatString %04d
append substituents { [dict get $date year]}
}
z { # The time zone as hours and minutes
# east (+) or west (-) of Greenwich
append formatString %s
append substituents { [FormatNumericTimeZone \
[dict get $date tzOffset]]}
}
Z { # The name of the time zone
append formatString %s
append substituents { [dict get $date tzName]}
}
% { # A literal percent character
append formatString %%
}
default { # An unknown escape sequence
append formatString %% $char
}
}
}
percentE { # Character following %E
set state {}
switch -exact -- $char {
E {
append formatString %s
append substituents { } \
[string map \
[list @BCE@ [list [mc BCE]] \
@CE@ [list [mc CE]]] \
{[dict get {BCE @BCE@ CE @CE@} \
[dict get $date era]]}]
}
C { # Locale-dependent era
append formatString %s
append substituents { [dict get $date localeEra]}
}
y { # Locale-dependent year of the era
append preFormatCode {
set y [dict get $date localeYear]
if { $y >= 0 && $y < 100 } {
set Eyear [lindex $localeNumerals $y]
} else {
set Eyear $y
}
}
append formatString %s
append substituents { $Eyear}
}
default { # Unknown %E format group
append formatString %%E $char
}
}
}
percentO { # Character following %O
set state {}
switch -exact -- $char {
d - e { # Day of the month in alternative
# numerals
append formatString %s
append substituents \
{ [lindex $localeNumerals \
[dict get $date dayOfMonth]]}
}
H - k { # Hour of the day in alternative
# numerals
append formatString %s
append substituents \
{ [lindex $localeNumerals \
[expr { [dict get $date localSeconds]
/ 3600
% 24 }]]}
}
I - l { # Hour (12-11) AM/PM in alternative
# numerals
append formatString %s
append substituents \
{ [lindex $localeNumerals \
[expr { ( ( ( [dict get $date localSeconds]
% 86400 )
+ 86400
- 3600 )
/ 3600 )
% 12 + 1 }]]}
}
m { # Month number in alternative numerals
append formatString %s
append substituents \
{ [lindex $localeNumerals [dict get $date month]]}
}
M { # Minute of the hour in alternative
# numerals
append formatString %s
append substituents \
{ [lindex $localeNumerals \
[expr { [dict get $date localSeconds]
/ 60
% 60 }]]}
}
S { # Second of the minute in alternative
# numerals
append formatString %s
append substituents \
{ [lindex $localeNumerals \
[expr { [dict get $date localSeconds]
% 60 }]]}
}
u { # Day of the week (Monday=1,Sunday=7)
# in alternative numerals
append formatString %s
append substituents \
{ [lindex $localeNumerals \
[dict get $date dayOfWeek]]}
}
w { # Day of the week (Sunday=0,Saturday=6)
# in alternative numerals
append formatString %s
append substituents \
{ [lindex $localeNumerals \
[expr { [dict get $date dayOfWeek] % 7 }]]}
}
y { # Year of the century in alternative
# numerals
append formatString %s
append substituents \
{ [lindex $localeNumerals \
[expr { [dict get $date year] % 100 }]]}
}
default { # Unknown format group
append formatString %%O $char
}
}
}
}
}
# Clean up any improperly terminated groups
switch -exact -- $state {
percent {
append formatString %%
}
percentE {
append retval %%E
}
percentO {
append retval %%O
}
}
proc $procName {clockval timezone} "
$preFormatCode
return \[::format [list $formatString] $substituents\]
"
# puts [list $procName [info args $procName] [info body $procName]]
return $procName
}
#----------------------------------------------------------------------
#
# clock scan --
#
# Inputs a count of seconds since the Posix Epoch as a time of day.
#
# The 'clock format' command scans times of day on input. Refer to the user
# documentation to see what it does.
#
#----------------------------------------------------------------------
proc ::tcl::clock::scan { args } {
set format {}
# Check the count of args
if { [llength $args] < 1 || [llength $args] % 2 != 1 } {
set cmdName "clock scan"
return -code error \
-errorcode [list CLOCK wrongNumArgs] \
"wrong \# args: should be\
\"$cmdName string\
?-base seconds?\
?-format string? ?-gmt boolean?\
?-locale LOCALE? ?-timezone ZONE?\""
}
# Set defaults
set base [clock seconds]
set string [lindex $args 0]
set format {}
set gmt 0
set locale c
set timezone [GetSystemTimeZone]
# Pick up command line options.
foreach { flag value } [lreplace $args 0 0] {
set saw($flag) {}
switch -exact -- $flag {
-b - -ba - -bas - -base {
set base $value
}
-f - -fo - -for - -form - -forma - -format {
set format $value
}
-g - -gm - -gmt {
set gmt $value
}
-l - -lo - -loc - -loca - -local - -locale {
set locale [string tolower $value]
}
-t - -ti - -tim - -time - -timez - -timezo - -timezon - -timezone {
set timezone $value
}
default {
return -code error \
-errorcode [list CLOCK badOption $flag] \
"bad option \"$flag\",\
must be -base, -format, -gmt, -locale or -timezone"
}
}
}
# Check options for validity
if { [info exists saw(-gmt)] && [info exists saw(-timezone)] } {
return -code error \
-errorcode [list CLOCK gmtWithTimezone] \
"cannot use -gmt and -timezone in same call"
}
if { [catch { expr { wide($base) } } result] } {
return -code error "expected integer but got \"$base\""
}
if { ![string is boolean -strict $gmt] } {
return -code error "expected boolean value but got \"$gmt\""
} elseif { $gmt } {
set timezone :GMT
}
if { ![info exists saw(-format)] } {
# Perhaps someday we'll localize the legacy code. Right now, it's not
# localized.
if { [info exists saw(-locale)] } {
return -code error \
-errorcode [list CLOCK flagWithLegacyFormat] \
"legacy \[clock scan\] does not support -locale"
}
return [FreeScan $string $base $timezone $locale]
}
# Change locale if a fresh locale has been given on the command line.
EnterLocale $locale
try {
# Map away the locale-dependent composite format groups
set scanner [ParseClockScanFormat $format $locale]
return [$scanner $string $base $timezone]
} trap CLOCK {result opts} {
# Conceal location of generation of expected errors
dict unset opts -errorinfo
return -options $opts $result
}
}
#----------------------------------------------------------------------
#
# FreeScan --
#
# Scans a time in free format
#
# Parameters:
# string - String containing the time to scan
# base - Base time, expressed in seconds from the Epoch
# timezone - Default time zone in which the time will be expressed
# locale - (Unused) Name of the locale where the time will be scanned.
#
# Results:
# Returns the date and time extracted from the string in seconds from
# the epoch
#
#----------------------------------------------------------------------
proc ::tcl::clock::FreeScan { string base timezone locale } {
variable TZData
# Get the data for time changes in the given zone
try {
SetupTimeZone $timezone
} on error {retval opts} {
dict unset opts -errorinfo
return -options $opts $retval
}
# Extract year, month and day from the base time for the parser to use as
# defaults
set date [GetDateFields $base $TZData($timezone) 2361222]
dict set date secondOfDay [expr {
[dict get $date localSeconds] % 86400
}]
# Parse the date. The parser will return a list comprising date, time,
# time zone, relative month/day/seconds, relative weekday, ordinal month.
try {
set scanned [Oldscan $string \
[dict get $date year] \
[dict get $date month] \
[dict get $date dayOfMonth]]
lassign $scanned \
parseDate parseTime parseZone parseRel \
parseWeekday parseOrdinalMonth
} on error message {
return -code error \
"unable to convert date-time string \"$string\": $message"
}
# If the caller supplied a date in the string, update the 'date' dict with
# the value. If the caller didn't specify a time with the date, default to
# midnight.
if { [llength $parseDate] > 0 } {
lassign $parseDate y m d
if { $y < 100 } {
if { $y >= 39 } {
incr y 1900
} else {
incr y 2000
}
}
dict set date era CE
dict set date year $y
dict set date month $m
dict set date dayOfMonth $d
if { $parseTime eq {} } {
set parseTime 0
}
}
# If the caller supplied a time zone in the string, it comes back as a
# two-element list; the first element is the number of minutes east of
# Greenwich, and the second is a Daylight Saving Time indicator (1 == yes,
# 0 == no, -1 == unknown). We make it into a time zone indicator of
# +-hhmm.
if { [llength $parseZone] > 0 } {
lassign $parseZone minEast dstFlag
set timezone [FormatNumericTimeZone \
[expr { 60 * $minEast + 3600 * $dstFlag }]]
SetupTimeZone $timezone
}
dict set date tzName $timezone
# Assemble date, time, zone into seconds-from-epoch
set date [GetJulianDayFromEraYearMonthDay $date[set date {}] 2361222]
if { $parseTime ne {} } {
dict set date secondOfDay $parseTime
} elseif { [llength $parseWeekday] != 0
|| [llength $parseOrdinalMonth] != 0
|| ( [llength $parseRel] != 0
&& ( [lindex $parseRel 0] != 0
|| [lindex $parseRel 1] != 0 ) ) } {
dict set date secondOfDay 0
}
dict set date localSeconds [expr {
-210866803200
+ ( 86400 * wide([dict get $date julianDay]) )
+ [dict get $date secondOfDay]
}]
dict set date tzName $timezone
set date [ConvertLocalToUTC $date[set date {}] $TZData($timezone) 2361222]
set seconds [dict get $date seconds]
# Do relative times
if { [llength $parseRel] > 0 } {
lassign $parseRel relMonth relDay relSecond
set seconds [add $seconds \
$relMonth months $relDay days $relSecond seconds \
-timezone $timezone -locale $locale]
}
# Do relative weekday
if { [llength $parseWeekday] > 0 } {
lassign $parseWeekday dayOrdinal dayOfWeek
set date2 [GetDateFields $seconds $TZData($timezone) 2361222]
dict set date2 era CE
set jdwkday [WeekdayOnOrBefore $dayOfWeek [expr {
[dict get $date2 julianDay] + 6
}]]
incr jdwkday [expr { 7 * $dayOrdinal }]
if { $dayOrdinal > 0 } {
incr jdwkday -7
}
dict set date2 secondOfDay \
[expr { [dict get $date2 localSeconds] % 86400 }]
dict set date2 julianDay $jdwkday
dict set date2 localSeconds [expr {
-210866803200
+ ( 86400 * wide([dict get $date2 julianDay]) )
+ [dict get $date secondOfDay]
}]
dict set date2 tzName $timezone
set date2 [ConvertLocalToUTC $date2[set date2 {}] $TZData($timezone) \
2361222]
set seconds [dict get $date2 seconds]
}
# Do relative month
if { [llength $parseOrdinalMonth] > 0 } {
lassign $parseOrdinalMonth monthOrdinal monthNumber
if { $monthOrdinal > 0 } {
set monthDiff [expr { $monthNumber - [dict get $date month] }]
if { $monthDiff <= 0 } {
incr monthDiff 12
}
incr monthOrdinal -1
} else {
set monthDiff [expr { [dict get $date month] - $monthNumber }]
if { $monthDiff >= 0 } {
incr monthDiff -12
}
incr monthOrdinal
}
set seconds [add $seconds $monthOrdinal years $monthDiff months \
-timezone $timezone -locale $locale]
}
return $seconds
}
#----------------------------------------------------------------------
#
# ParseClockScanFormat --
#
# Parses a format string given to [clock scan -format]
#
# Parameters:
# formatString - The format being parsed
# locale - The current locale
#
# Results:
# Constructs and returns a procedure that accepts the string being
# scanned, the base time, and the time zone. The procedure will either
# return the scanned time or else throw an error that should be rethrown
# to the caller of [clock scan]
#
# Side effects:
# The given procedure is defined in the ::tcl::clock namespace. Scan
# procedures are not deleted once installed.
#
# Why do we parse dates by defining a procedure to parse them? The reason is
# that by doing so, we have one convenient place to cache all the information:
# the regular expressions that match the patterns (which will be compiled),
# the code that assembles the date information, everything lands in one place.
# In this way, when a given format is reused at run time, all the information
# of how to apply it is available in a single place.
#
#----------------------------------------------------------------------
proc ::tcl::clock::ParseClockScanFormat {formatString locale} {
# Check whether the format has been parsed previously, and return the
# existing recognizer if it has.
set procName scanproc'$formatString'$locale
set procName [namespace current]::[string map {: {\:} \\ {\\}} $procName]
if { [namespace which $procName] != {} } {
return $procName
}
variable DateParseActions
variable TimeParseActions
# Localize the %x, %X, etc. groups
set formatString [LocalizeFormat $locale $formatString]
# Condense whitespace
regsub -all {[[:space:]]+} $formatString { } formatString
# Walk through the groups of the format string. In this loop, we
# accumulate:
# - a regular expression that matches the string,
# - the count of capturing brackets in the regexp
# - a set of code that post-processes the fields captured by the regexp,
# - a dictionary whose keys are the names of fields that are present
# in the format string.
set re {^[[:space:]]*}
set captureCount 0
set postcode {}
set fieldSet [dict create]
set fieldCount 0
set postSep {}
set state {}
foreach c [split $formatString {}] {
switch -exact -- $state {
{} {
if { $c eq "%" } {
set state %
} elseif { $c eq " " } {
append re {[[:space:]]+}
} else {
if { ! [string is alnum $c] } {
append re "\\"
}
append re $c
}
}
% {
set state {}
switch -exact -- $c {
% {
append re %
}
{ } {
append re "\[\[:space:\]\]*"
}
a - A { # Day of week, in words
set l {}
foreach \
i {7 1 2 3 4 5 6} \
abr [mc DAYS_OF_WEEK_ABBREV] \
full [mc DAYS_OF_WEEK_FULL] {
dict set l [string tolower $abr] $i
dict set l [string tolower $full] $i
incr i
}
lassign [UniquePrefixRegexp $l] regex lookup
append re ( $regex )
dict set fieldSet dayOfWeek [incr fieldCount]
append postcode "dict set date dayOfWeek \[" \
"dict get " [list $lookup] " " \
\[ {string tolower $field} [incr captureCount] \] \
"\]\n"
}
b - B - h { # Name of month
set i 0
set l {}
foreach \
abr [mc MONTHS_ABBREV] \
full [mc MONTHS_FULL] {
incr i
dict set l [string tolower $abr] $i
dict set l [string tolower $full] $i
}
lassign [UniquePrefixRegexp $l] regex lookup
append re ( $regex )
dict set fieldSet month [incr fieldCount]
append postcode "dict set date month \[" \
"dict get " [list $lookup] \
" " \[ {string tolower $field} \
[incr captureCount] \] \
"\]\n"
}
C { # Gregorian century
append re \\s*(\\d\\d?)
dict set fieldSet century [incr fieldCount]
append postcode "dict set date century \[" \
"::scan \$field" [incr captureCount] " %d" \
"\]\n"
}
d - e { # Day of month
append re \\s*(\\d\\d?)
dict set fieldSet dayOfMonth [incr fieldCount]
append postcode "dict set date dayOfMonth \[" \
"::scan \$field" [incr captureCount] " %d" \
"\]\n"
}
E { # Prefix for locale-specific codes
set state %E
}
g { # ISO8601 2-digit year
append re \\s*(\\d\\d)
dict set fieldSet iso8601YearOfCentury \
[incr fieldCount]
append postcode \
"dict set date iso8601YearOfCentury \[" \
"::scan \$field" [incr captureCount] " %d" \
"\]\n"
}
G { # ISO8601 4-digit year
append re \\s*(\\d\\d)(\\d\\d)
dict set fieldSet iso8601Century [incr fieldCount]
dict set fieldSet iso8601YearOfCentury \
[incr fieldCount]
append postcode \
"dict set date iso8601Century \[" \
"::scan \$field" [incr captureCount] " %d" \
"\]\n" \
"dict set date iso8601YearOfCentury \[" \
"::scan \$field" [incr captureCount] " %d" \
"\]\n"
}
H - k { # Hour of day
append re \\s*(\\d\\d?)
dict set fieldSet hour [incr fieldCount]
append postcode "dict set date hour \[" \
"::scan \$field" [incr captureCount] " %d" \
"\]\n"
}
I - l { # Hour, AM/PM
append re \\s*(\\d\\d?)
dict set fieldSet hourAMPM [incr fieldCount]
append postcode "dict set date hourAMPM \[" \
"::scan \$field" [incr captureCount] " %d" \
"\]\n"
}
j { # Day of year
append re \\s*(\\d\\d?\\d?)
dict set fieldSet dayOfYear [incr fieldCount]
append postcode "dict set date dayOfYear \[" \
"::scan \$field" [incr captureCount] " %d" \
"\]\n"
}
J { # Julian Day Number
append re \\s*(\\d+)
dict set fieldSet julianDay [incr fieldCount]
append postcode "dict set date julianDay \[" \
"::scan \$field" [incr captureCount] " %ld" \
"\]\n"
}
m - N { # Month number
append re \\s*(\\d\\d?)
dict set fieldSet month [incr fieldCount]
append postcode "dict set date month \[" \
"::scan \$field" [incr captureCount] " %d" \
"\]\n"
}
M { # Minute
append re \\s*(\\d\\d?)
dict set fieldSet minute [incr fieldCount]
append postcode "dict set date minute \[" \
"::scan \$field" [incr captureCount] " %d" \
"\]\n"
}
n { # Literal newline
append re \\n
}
O { # Prefix for locale numerics
set state %O
}
p - P { # AM/PM indicator
set l [list [string tolower [mc AM]] 0 \
[string tolower [mc PM]] 1]
lassign [UniquePrefixRegexp $l] regex lookup
append re ( $regex )
dict set fieldSet amPmIndicator [incr fieldCount]
append postcode "dict set date amPmIndicator \[" \
"dict get " [list $lookup] " \[string tolower " \
"\$field" \
[incr captureCount] \
"\]\]\n"
}
Q { # Hi, Jeff!
append re {Stardate\s+([-+]?\d+)(\d\d\d)[.](\d)}
incr captureCount
dict set fieldSet seconds [incr fieldCount]
append postcode {dict set date seconds } \[ \
{ParseStarDate $field} [incr captureCount] \
{ $field} [incr captureCount] \
{ $field} [incr captureCount] \
\] \n
}
s { # Seconds from Posix Epoch
# This next case is insanely difficult, because it's
# problematic to determine whether the field is
# actually within the range of a wide integer.
append re {\s*([-+]?\d+)}
dict set fieldSet seconds [incr fieldCount]
append postcode {dict set date seconds } \[ \
{ScanWide $field} [incr captureCount] \] \n
}
S { # Second
append re \\s*(\\d\\d?)
dict set fieldSet second [incr fieldCount]
append postcode "dict set date second \[" \
"::scan \$field" [incr captureCount] " %d" \
"\]\n"
}
t { # Literal tab character
append re \\t
}
u - w { # Day number within week, 0 or 7 == Sun
# 1=Mon, 6=Sat
append re \\s*(\\d)
dict set fieldSet dayOfWeek [incr fieldCount]
append postcode {::scan $field} [incr captureCount] \
{ %d dow} \n \
{
if { $dow == 0 } {
set dow 7
} elseif { $dow > 7 } {
return -code error \
-errorcode [list CLOCK badDayOfWeek] \
"day of week is greater than 7"
}
dict set date dayOfWeek $dow
}
}
U { # Week of year. The first Sunday of
# the year is the first day of week
# 01. No scan rule uses this group.
append re \\s*\\d\\d?
}
V { # Week of ISO8601 year
append re \\s*(\\d\\d?)
dict set fieldSet iso8601Week [incr fieldCount]
append postcode "dict set date iso8601Week \[" \
"::scan \$field" [incr captureCount] " %d" \
"\]\n"
}
W { # Week of the year (00-53). The first
# Monday of the year is the first day
# of week 01. No scan rule uses this
# group.
append re \\s*\\d\\d?
}
y { # Two-digit Gregorian year
append re \\s*(\\d\\d?)
dict set fieldSet yearOfCentury [incr fieldCount]
append postcode "dict set date yearOfCentury \[" \
"::scan \$field" [incr captureCount] " %d" \
"\]\n"
}
Y { # 4-digit Gregorian year
append re \\s*(\\d\\d)(\\d\\d)
dict set fieldSet century [incr fieldCount]
dict set fieldSet yearOfCentury [incr fieldCount]
append postcode \
"dict set date century \[" \
"::scan \$field" [incr captureCount] " %d" \
"\]\n" \
"dict set date yearOfCentury \[" \
"::scan \$field" [incr captureCount] " %d" \
"\]\n"
}
z - Z { # Time zone name
append re {(?:([-+]\d\d(?::?\d\d(?::?\d\d)?)?)|([[:alnum:]]{1,4}))}
dict set fieldSet tzName [incr fieldCount]
append postcode \
{if } \{ { $field} [incr captureCount] \
{ ne "" } \} { } \{ \n \
{dict set date tzName $field} \
$captureCount \n \
\} { else } \{ \n \
{dict set date tzName } \[ \
{ConvertLegacyTimeZone $field} \
[incr captureCount] \] \n \
\} \n \
}
% { # Literal percent character
append re %
}
default {
append re %
if { ! [string is alnum $c] } {
append re \\
}
append re $c
}
}
}
%E {
switch -exact -- $c {
C { # Locale-dependent era
set d {}
foreach triple [mc LOCALE_ERAS] {
lassign $triple t symbol year
dict set d [string tolower $symbol] $year
}
lassign [UniquePrefixRegexp $d] regex lookup
append re (?: $regex )
}
E {
set l {}
dict set l [string tolower [mc BCE]] BCE
dict set l [string tolower [mc CE]] CE
dict set l b.c.e. BCE
dict set l c.e. CE
dict set l b.c. BCE
dict set l a.d. CE
lassign [UniquePrefixRegexp $l] regex lookup
append re ( $regex )
dict set fieldSet era [incr fieldCount]
append postcode "dict set date era \["\
"dict get " [list $lookup] \
{ } \[ {string tolower $field} \
[incr captureCount] \] \
"\]\n"
}
y { # Locale-dependent year of the era
lassign [LocaleNumeralMatcher $locale] regex lookup
append re $regex
incr captureCount
}
default {
append re %E
if { ! [string is alnum $c] } {
append re \\
}
append re $c
}
}
set state {}
}
%O {
switch -exact -- $c {
d - e {
lassign [LocaleNumeralMatcher $locale] regex lookup
append re $regex
dict set fieldSet dayOfMonth [incr fieldCount]
append postcode "dict set date dayOfMonth \[" \
"dict get " [list $lookup] " \$field" \
[incr captureCount] \
"\]\n"
}
H - k {
lassign [LocaleNumeralMatcher $locale] regex lookup
append re $regex
dict set fieldSet hour [incr fieldCount]
append postcode "dict set date hour \[" \
"dict get " [list $lookup] " \$field" \
[incr captureCount] \
"\]\n"
}
I - l {
lassign [LocaleNumeralMatcher $locale] regex lookup
append re $regex
dict set fieldSet hourAMPM [incr fieldCount]
append postcode "dict set date hourAMPM \[" \
"dict get " [list $lookup] " \$field" \
[incr captureCount] \
"\]\n"
}
m {
lassign [LocaleNumeralMatcher $locale] regex lookup
append re $regex
dict set fieldSet month [incr fieldCount]
append postcode "dict set date month \[" \
"dict get " [list $lookup] " \$field" \
[incr captureCount] \
"\]\n"
}
M {
lassign [LocaleNumeralMatcher $locale] regex lookup
append re $regex
dict set fieldSet minute [incr fieldCount]
append postcode "dict set date minute \[" \
"dict get " [list $lookup] " \$field" \
[incr captureCount] \
"\]\n"
}
S {
lassign [LocaleNumeralMatcher $locale] regex lookup
append re $regex
dict set fieldSet second [incr fieldCount]
append postcode "dict set date second \[" \
"dict get " [list $lookup] " \$field" \
[incr captureCount] \
"\]\n"
}
u - w {
lassign [LocaleNumeralMatcher $locale] regex lookup
append re $regex
dict set fieldSet dayOfWeek [incr fieldCount]
append postcode "set dow \[dict get " [list $lookup] \
{ $field} [incr captureCount] \] \n \
{
if { $dow == 0 } {
set dow 7
} elseif { $dow > 7 } {
return -code error \
-errorcode [list CLOCK badDayOfWeek] \
"day of week is greater than 7"
}
dict set date dayOfWeek $dow
}
}
y {
lassign [LocaleNumeralMatcher $locale] regex lookup
append re $regex
dict set fieldSet yearOfCentury [incr fieldCount]
append postcode {dict set date yearOfCentury } \[ \
{dict get } [list $lookup] { $field} \
[incr captureCount] \] \n
}
default {
append re %O
if { ! [string is alnum $c] } {
append re \\
}
append re $c
}
}
set state {}
}
}
}
# Clean up any unfinished format groups
append re $state \\s*\$
# Build the procedure
set procBody {}
append procBody "variable ::tcl::clock::TZData" \n
append procBody "if \{ !\[ regexp -nocase [list $re] \$string ->"
for { set i 1 } { $i <= $captureCount } { incr i } {
append procBody " " field $i
}
append procBody "\] \} \{" \n
append procBody {
return -code error -errorcode [list CLOCK badInputString] \
{input string does not match supplied format}
}
append procBody \}\n
append procBody "set date \[dict create\]" \n
append procBody {dict set date tzName $timeZone} \n
append procBody $postcode
append procBody [list set changeover [mc GREGORIAN_CHANGE_DATE]] \n
# Set up the time zone before doing anything with a default base date
# that might need a timezone to interpret it.
if { ![dict exists $fieldSet seconds]
&& ![dict exists $fieldSet starDate] } {
if { [dict exists $fieldSet tzName] } {
append procBody {
set timeZone [dict get $date tzName]
}
}
append procBody {
::tcl::clock::SetupTimeZone $timeZone
}
}
# Add code that gets Julian Day Number from the fields.
append procBody [MakeParseCodeFromFields $fieldSet $DateParseActions]
# Get time of day
append procBody [MakeParseCodeFromFields $fieldSet $TimeParseActions]
# Assemble seconds from the Julian day and second of the day.
# Convert to local time unless epoch seconds or stardate are
# being processed - they're always absolute
if { ![dict exists $fieldSet seconds]
&& ![dict exists $fieldSet starDate] } {
append procBody {
if { [dict get $date julianDay] > 5373484 } {
return -code error -errorcode [list CLOCK dateTooLarge] \
"requested date too large to represent"
}
dict set date localSeconds [expr {
-210866803200
+ ( 86400 * wide([dict get $date julianDay]) )
+ [dict get $date secondOfDay]
}]
}
# Finally, convert the date to local time
append procBody {
set date [::tcl::clock::ConvertLocalToUTC $date[set date {}] \
$TZData($timeZone) $changeover]
}
}
# Return result
append procBody {return [dict get $date seconds]} \n
proc $procName { string baseTime timeZone } $procBody
# puts [list proc $procName [list string baseTime timeZone] $procBody]
return $procName
}
#----------------------------------------------------------------------
#
# LocaleNumeralMatcher --
#
# Composes a regexp that captures the numerals in the given locale, and
# a dictionary to map them to conventional numerals.
#
# Parameters:
# locale - Name of the current locale
#
# Results:
# Returns a two-element list comprising the regexp and the dictionary.
#
# Side effects:
# Caches the result.
#
#----------------------------------------------------------------------
proc ::tcl::clock::LocaleNumeralMatcher {l} {
variable LocaleNumeralCache
if { ![dict exists $LocaleNumeralCache $l] } {
set d {}
set i 0
set sep \(
foreach n [mc LOCALE_NUMERALS] {
dict set d $n $i
regsub -all {[^[:alnum:]]} $n \\\\& subex
append re $sep $subex
set sep |
incr i
}
append re \)
dict set LocaleNumeralCache $l [list $re $d]
}
return [dict get $LocaleNumeralCache $l]
}
#----------------------------------------------------------------------
#
# UniquePrefixRegexp --
#
# Composes a regexp that performs unique-prefix matching. The RE
# matches one of a supplied set of strings, or any unique prefix
# thereof.
#
# Parameters:
# data - List of alternating match-strings and values.
# Match-strings with distinct values are considered
# distinct.
#
# Results:
# Returns a two-element list. The first is a regexp that matches any
# unique prefix of any of the strings. The second is a dictionary whose
# keys are match values from the regexp and whose values are the
# corresponding values from 'data'.
#
# Side effects:
# None.
#
#----------------------------------------------------------------------
proc ::tcl::clock::UniquePrefixRegexp { data } {
# The 'successors' dictionary will contain, for each string that is a
# prefix of any key, all characters that may follow that prefix. The
# 'prefixMapping' dictionary will have keys that are prefixes of keys and
# values that correspond to the keys.
set prefixMapping [dict create]
set successors [dict create {} {}]
# Walk the key-value pairs
foreach { key value } $data {
# Construct all prefixes of the key;
set prefix {}
foreach char [split $key {}] {
set oldPrefix $prefix
dict set successors $oldPrefix $char {}
append prefix $char
# Put the prefixes in the 'prefixMapping' and 'successors'
# dictionaries
dict lappend prefixMapping $prefix $value
if { ![dict exists $successors $prefix] } {
dict set successors $prefix {}
}
}
}
# Identify those prefixes that designate unique values, and those that are
# the full keys
set uniquePrefixMapping {}
dict for { key valueList } $prefixMapping {
if { [llength $valueList] == 1 } {
dict set uniquePrefixMapping $key [lindex $valueList 0]
}
}
foreach { key value } $data {
dict set uniquePrefixMapping $key $value
}
# Construct the re.
return [list \
[MakeUniquePrefixRegexp $successors $uniquePrefixMapping {}] \
$uniquePrefixMapping]
}
#----------------------------------------------------------------------
#
# MakeUniquePrefixRegexp --
#
# Service procedure for 'UniquePrefixRegexp' that constructs a regular
# expresison that matches the unique prefixes.
#
# Parameters:
# successors - Dictionary whose keys are all prefixes
# of keys passed to 'UniquePrefixRegexp' and whose
# values are dictionaries whose keys are the characters
# that may follow those prefixes.
# uniquePrefixMapping - Dictionary whose keys are the unique
# prefixes and whose values are not examined.
# prefixString - Current prefix being processed.
#
# Results:
# Returns a constructed regular expression that matches the set of
# unique prefixes beginning with the 'prefixString'.
#
# Side effects:
# None.
#
#----------------------------------------------------------------------
proc ::tcl::clock::MakeUniquePrefixRegexp { successors
uniquePrefixMapping
prefixString } {
# Get the characters that may follow the current prefix string
set schars [lsort -ascii [dict keys [dict get $successors $prefixString]]]
if { [llength $schars] == 0 } {
return {}
}
# If there is more than one successor character, or if the current prefix
# is a unique prefix, surround the generated re with non-capturing
# parentheses.
set re {}
if {
[dict exists $uniquePrefixMapping $prefixString]
|| [llength $schars] > 1
} then {
append re "(?:"
}
# Generate a regexp that matches the successors.
set sep ""
foreach { c } $schars {
set nextPrefix $prefixString$c
regsub -all {[^[:alnum:]]} $c \\\\& rechar
append re $sep $rechar \
[MakeUniquePrefixRegexp \
$successors $uniquePrefixMapping $nextPrefix]
set sep |
}
# If the current prefix is a unique prefix, make all following text
# optional. Otherwise, if there is more than one successor character,
# close the non-capturing parentheses.
if { [dict exists $uniquePrefixMapping $prefixString] } {
append re ")?"
} elseif { [llength $schars] > 1 } {
append re ")"
}
return $re
}
#----------------------------------------------------------------------
#
# MakeParseCodeFromFields --
#
# Composes Tcl code to extract the Julian Day Number from a dictionary
# containing date fields.
#
# Parameters:
# dateFields -- Dictionary whose keys are fields of the date,
# and whose values are the rightmost positions
# at which those fields appear.
# parseActions -- List of triples: field set, priority, and
# code to emit. Smaller priorities are better, and
# the list must be in ascending order by priority
#
# Results:
# Returns a burst of code that extracts the day number from the given
# date.
#
# Side effects:
# None.
#
#----------------------------------------------------------------------
proc ::tcl::clock::MakeParseCodeFromFields { dateFields parseActions } {
set currPrio 999
set currFieldPos [list]
set currCodeBurst {
error "in ::tcl::clock::MakeParseCodeFromFields: can't happen"
}
foreach { fieldSet prio parseAction } $parseActions {
# If we've found an answer that's better than any that follow, quit
# now.
if { $prio > $currPrio } {
break
}
# Accumulate the field positions that are used in the current field
# grouping.
set fieldPos [list]
set ok true
foreach field $fieldSet {
if { ! [dict exists $dateFields $field] } {
set ok 0
break
}
lappend fieldPos [dict get $dateFields $field]
}
# Quit if we don't have a complete set of fields
if { !$ok } {
continue
}
# Determine whether the current answer is better than the last.
set fPos [lsort -integer -decreasing $fieldPos]
if { $prio == $currPrio } {
foreach currPos $currFieldPos newPos $fPos {
if {
![string is integer $newPos]
|| ![string is integer $currPos]
|| $newPos > $currPos
} then {
break
}
if { $newPos < $currPos } {
set ok 0
break
}
}
}
if { !$ok } {
continue
}
# Remember the best possibility for extracting date information
set currPrio $prio
set currFieldPos $fPos
set currCodeBurst $parseAction
}
return $currCodeBurst
}
#----------------------------------------------------------------------
#
# EnterLocale --
#
# Switch [mclocale] to a given locale if necessary
#
# Parameters:
# locale -- Desired locale
#
# Results:
# Returns the locale that was previously current.
#
# Side effects:
# Does [mclocale]. If necessary, loades the designated locale's files.
#
#----------------------------------------------------------------------
proc ::tcl::clock::EnterLocale { locale } {
if { $locale eq {system} } {
if { $::tcl_platform(platform) ne {windows} } {
# On a non-windows platform, the 'system' locale is the same as
# the 'current' locale
set locale current
} else {
# On a windows platform, the 'system' locale is adapted from the
# 'current' locale by applying the date and time formats from the
# Control Panel. First, load the 'current' locale if it's not yet
# loaded
mcpackagelocale set [mclocale]
# Make a new locale string for the system locale, and get the
# Control Panel information
set locale [mclocale]_windows
if { ! [mcpackagelocale present $locale] } {
LoadWindowsDateTimeFormats $locale
}
}
}
if { $locale eq {current}} {
set locale [mclocale]
}
# Eventually load the locale
mcpackagelocale set $locale
}
#----------------------------------------------------------------------
#
# LoadWindowsDateTimeFormats --
#
# Load the date/time formats from the Control Panel in Windows and
# convert them so that they're usable by Tcl.
#
# Parameters:
# locale - Name of the locale in whose message catalog
# the converted formats are to be stored.
#
# Results:
# None.
#
# Side effects:
# Updates the given message catalog with the locale strings.
#
# Presumes that on entry, [mclocale] is set to the current locale, so that
# default strings can be obtained if the Registry query fails.
#
#----------------------------------------------------------------------
proc ::tcl::clock::LoadWindowsDateTimeFormats { locale } {
# Bail out if we can't find the Registry
variable NoRegistry
if { [info exists NoRegistry] } return
if { ![catch {
registry get "HKEY_CURRENT_USER\\Control Panel\\International" \
sShortDate
} string] } {
set quote {}
set datefmt {}
foreach { unquoted quoted } [split $string '] {
append datefmt $quote [string map {
dddd %A
ddd %a
dd %d
d %e
MMMM %B
MMM %b
MM %m
M %N
yyyy %Y
yy %y
y %y
gg {}
} $unquoted]
if { $quoted eq {} } {
set quote '
} else {
set quote $quoted
}
}
::msgcat::mcset $locale DATE_FORMAT $datefmt
}
if { ![catch {
registry get "HKEY_CURRENT_USER\\Control Panel\\International" \
sLongDate
} string] } {
set quote {}
set ldatefmt {}
foreach { unquoted quoted } [split $string '] {
append ldatefmt $quote [string map {
dddd %A
ddd %a
dd %d
d %e
MMMM %B
MMM %b
MM %m
M %N
yyyy %Y
yy %y
y %y
gg {}
} $unquoted]
if { $quoted eq {} } {
set quote '
} else {
set quote $quoted
}
}
::msgcat::mcset $locale LOCALE_DATE_FORMAT $ldatefmt
}
if { ![catch {
registry get "HKEY_CURRENT_USER\\Control Panel\\International" \
sTimeFormat
} string] } {
set quote {}
set timefmt {}
foreach { unquoted quoted } [split $string '] {
append timefmt $quote [string map {
HH %H
H %k
hh %I
h %l
mm %M
m %M
ss %S
s %S
tt %p
t %p
} $unquoted]
if { $quoted eq {} } {
set quote '
} else {
set quote $quoted
}
}
::msgcat::mcset $locale TIME_FORMAT $timefmt
}
catch {
::msgcat::mcset $locale DATE_TIME_FORMAT "$datefmt $timefmt"
}
catch {
::msgcat::mcset $locale LOCALE_DATE_TIME_FORMAT "$ldatefmt $timefmt"
}
return
}
#----------------------------------------------------------------------
#
# LocalizeFormat --
#
# Map away locale-dependent format groups in a clock format.
#
# Parameters:
# locale -- Current [mclocale] locale, supplied to avoid
# an extra call
# format -- Format supplied to [clock scan] or [clock format]
#
# Results:
# Returns the string with locale-dependent composite format groups
# substituted out.
#
# Side effects:
# None.
#
#----------------------------------------------------------------------
proc ::tcl::clock::LocalizeFormat { locale format } {
# message catalog key to cache this format
set key FORMAT_$format
if { [::msgcat::mcexists -exactlocale -exactnamespace $key] } {
return [mc $key]
}
# Handle locale-dependent format groups by mapping them out of the format
# string. Note that the order of the [string map] operations is
# significant because later formats can refer to later ones; for example
# %c can refer to %X, which in turn can refer to %T.
set list {
%% %%
%D %m/%d/%Y
%+ {%a %b %e %H:%M:%S %Z %Y}
}
lappend list %EY [string map $list [mc LOCALE_YEAR_FORMAT]]
lappend list %T [string map $list [mc TIME_FORMAT_24_SECS]]
lappend list %R [string map $list [mc TIME_FORMAT_24]]
lappend list %r [string map $list [mc TIME_FORMAT_12]]
lappend list %X [string map $list [mc TIME_FORMAT]]
lappend list %EX [string map $list [mc LOCALE_TIME_FORMAT]]
lappend list %x [string map $list [mc DATE_FORMAT]]
lappend list %Ex [string map $list [mc LOCALE_DATE_FORMAT]]
lappend list %c [string map $list [mc DATE_TIME_FORMAT]]
lappend list %Ec [string map $list [mc LOCALE_DATE_TIME_FORMAT]]
set format [string map $list $format]
::msgcat::mcset $locale $key $format
return $format
}
#----------------------------------------------------------------------
#
# FormatNumericTimeZone --
#
# Formats a time zone as +hhmmss
#
# Parameters:
# z - Time zone in seconds east of Greenwich
#
# Results:
# Returns the time zone formatted in a numeric form
#
# Side effects:
# None.
#
#----------------------------------------------------------------------
proc ::tcl::clock::FormatNumericTimeZone { z } {
if { $z < 0 } {
set z [expr { - $z }]
set retval -
} else {
set retval +
}
append retval [::format %02d [expr { $z / 3600 }]]
set z [expr { $z % 3600 }]
append retval [::format %02d [expr { $z / 60 }]]
set z [expr { $z % 60 }]
if { $z != 0 } {
append retval [::format %02d $z]
}
return $retval
}
#----------------------------------------------------------------------
#
# FormatStarDate --
#
# Formats a date as a StarDate.
#
# Parameters:
# date - Dictionary containing 'year', 'dayOfYear', and
# 'localSeconds' fields.
#
# Results:
# Returns the given date formatted as a StarDate.
#
# Side effects:
# None.
#
# Jeff Hobbs put this in to support an atrocious pun about Tcl being
# "Enterprise ready." Now we're stuck with it.
#
#----------------------------------------------------------------------
proc ::tcl::clock::FormatStarDate { date } {
variable Roddenberry
# Get day of year, zero based
set doy [expr { [dict get $date dayOfYear] - 1 }]
# Determine whether the year is a leap year
set lp [IsGregorianLeapYear $date]
# Convert day of year to a fractional year
if { $lp } {
set fractYear [expr { 1000 * $doy / 366 }]
} else {
set fractYear [expr { 1000 * $doy / 365 }]
}
# Put together the StarDate
return [::format "Stardate %02d%03d.%1d" \
[expr { [dict get $date year] - $Roddenberry }] \
$fractYear \
[expr { [dict get $date localSeconds] % 86400
/ ( 86400 / 10 ) }]]
}
#----------------------------------------------------------------------
#
# ParseStarDate --
#
# Parses a StarDate
#
# Parameters:
# year - Year from the Roddenberry epoch
# fractYear - Fraction of a year specifiying the day of year.
# fractDay - Fraction of a day
#
# Results:
# Returns a count of seconds from the Posix epoch.
#
# Side effects:
# None.
#
# Jeff Hobbs put this in to support an atrocious pun about Tcl being
# "Enterprise ready." Now we're stuck with it.
#
#----------------------------------------------------------------------
proc ::tcl::clock::ParseStarDate { year fractYear fractDay } {
variable Roddenberry
# Build a tentative date from year and fraction.
set date [dict create \
gregorian 1 \
era CE \
year [expr { $year + $Roddenberry }] \
dayOfYear [expr { $fractYear * 365 / 1000 + 1 }]]
set date [GetJulianDayFromGregorianEraYearDay $date[set date {}]]
# Determine whether the given year is a leap year
set lp [IsGregorianLeapYear $date]
# Reconvert the fractional year according to whether the given year is a
# leap year
if { $lp } {
dict set date dayOfYear \
[expr { $fractYear * 366 / 1000 + 1 }]
} else {
dict set date dayOfYear \
[expr { $fractYear * 365 / 1000 + 1 }]
}
dict unset date julianDay
dict unset date gregorian
set date [GetJulianDayFromGregorianEraYearDay $date[set date {}]]
return [expr {
86400 * [dict get $date julianDay]
- 210866803200
+ ( 86400 / 10 ) * $fractDay
}]
}
#----------------------------------------------------------------------
#
# ScanWide --
#
# Scans a wide integer from an input
#
# Parameters:
# str - String containing a decimal wide integer
#
# Results:
# Returns the string as a pure wide integer. Throws an error if the
# string is misformatted or out of range.
#
#----------------------------------------------------------------------
proc ::tcl::clock::ScanWide { str } {
set count [::scan $str {%ld %c} result junk]
if { $count != 1 } {
return -code error -errorcode [list CLOCK notAnInteger $str] \
"\"$str\" is not an integer"
}
if { [incr result 0] != $str } {
return -code error -errorcode [list CLOCK integervalueTooLarge] \
"integer value too large to represent"
}
return $result
}
#----------------------------------------------------------------------
#
# InterpretTwoDigitYear --
#
# Given a date that contains only the year of the century, determines
# the target value of a two-digit year.
#
# Parameters:
# date - Dictionary containing fields of the date.
# baseTime - Base time relative to which the date is expressed.
# twoDigitField - Name of the field that stores the two-digit year.
# Default is 'yearOfCentury'
# fourDigitField - Name of the field that will receive the four-digit
# year. Default is 'year'
#
# Results:
# Returns the dictionary augmented with the four-digit year, stored in
# the given key.
#
# Side effects:
# None.
#
# The current rule for interpreting a two-digit year is that the year shall be
# between 1937 and 2037, thus staying within the range of a 32-bit signed
# value for time. This rule may change to a sliding window in future
# versions, so the 'baseTime' parameter (which is currently ignored) is
# provided in the procedure signature.
#
#----------------------------------------------------------------------
proc ::tcl::clock::InterpretTwoDigitYear { date baseTime
{ twoDigitField yearOfCentury }
{ fourDigitField year } } {
set yr [dict get $date $twoDigitField]
if { $yr <= 37 } {
dict set date $fourDigitField [expr { $yr + 2000 }]
} else {
dict set date $fourDigitField [expr { $yr + 1900 }]
}
return $date
}
#----------------------------------------------------------------------
#
# AssignBaseYear --
#
# Places the number of the current year into a dictionary.
#
# Parameters:
# date - Dictionary value to update
# baseTime - Base time from which to extract the year, expressed
# in seconds from the Posix epoch
# timezone - the time zone in which the date is being scanned
# changeover - the Julian Day on which the Gregorian calendar
# was adopted in the target locale.
#
# Results:
# Returns the dictionary with the current year assigned.
#
# Side effects:
# None.
#
#----------------------------------------------------------------------
proc ::tcl::clock::AssignBaseYear { date baseTime timezone changeover } {
variable TZData
# Find the Julian Day Number corresponding to the base time, and
# find the Gregorian year corresponding to that Julian Day.
set date2 [GetDateFields $baseTime $TZData($timezone) $changeover]
# Store the converted year
dict set date era [dict get $date2 era]
dict set date year [dict get $date2 year]
return $date
}
#----------------------------------------------------------------------
#
# AssignBaseIso8601Year --
#
# Determines the base year in the ISO8601 fiscal calendar.
#
# Parameters:
# date - Dictionary containing the fields of the date that
# is to be augmented with the base year.
# baseTime - Base time expressed in seconds from the Posix epoch.
# timeZone - Target time zone
# changeover - Julian Day of adoption of the Gregorian calendar in
# the target locale.
#
# Results:
# Returns the given date with "iso8601Year" set to the
# base year.
#
# Side effects:
# None.
#
#----------------------------------------------------------------------
proc ::tcl::clock::AssignBaseIso8601Year {date baseTime timeZone changeover} {
variable TZData
# Find the Julian Day Number corresponding to the base time
set date2 [GetDateFields $baseTime $TZData($timeZone) $changeover]
# Calculate the ISO8601 date and transfer the year
dict set date era CE
dict set date iso8601Year [dict get $date2 iso8601Year]
return $date
}
#----------------------------------------------------------------------
#
# AssignBaseMonth --
#
# Places the number of the current year and month into a
# dictionary.
#
# Parameters:
# date - Dictionary value to update
# baseTime - Time from which the year and month are to be
# obtained, expressed in seconds from the Posix epoch.
# timezone - Name of the desired time zone
# changeover - Julian Day on which the Gregorian calendar was adopted.
#
# Results:
# Returns the dictionary with the base year and month assigned.
#
# Side effects:
# None.
#
#----------------------------------------------------------------------
proc ::tcl::clock::AssignBaseMonth {date baseTime timezone changeover} {
variable TZData
# Find the year and month corresponding to the base time
set date2 [GetDateFields $baseTime $TZData($timezone) $changeover]
dict set date era [dict get $date2 era]
dict set date year [dict get $date2 year]
dict set date month [dict get $date2 month]
return $date
}
#----------------------------------------------------------------------
#
# AssignBaseWeek --
#
# Determines the base year and week in the ISO8601 fiscal calendar.
#
# Parameters:
# date - Dictionary containing the fields of the date that
# is to be augmented with the base year and week.
# baseTime - Base time expressed in seconds from the Posix epoch.
# changeover - Julian Day on which the Gregorian calendar was adopted
# in the target locale.
#
# Results:
# Returns the given date with "iso8601Year" set to the
# base year and "iso8601Week" to the week number.
#
# Side effects:
# None.
#
#----------------------------------------------------------------------
proc ::tcl::clock::AssignBaseWeek {date baseTime timeZone changeover} {
variable TZData
# Find the Julian Day Number corresponding to the base time
set date2 [GetDateFields $baseTime $TZData($timeZone) $changeover]
# Calculate the ISO8601 date and transfer the year
dict set date era CE
dict set date iso8601Year [dict get $date2 iso8601Year]
dict set date iso8601Week [dict get $date2 iso8601Week]
return $date
}
#----------------------------------------------------------------------
#
# AssignBaseJulianDay --
#
# Determines the base day for a time-of-day conversion.
#
# Parameters:
# date - Dictionary that is to get the base day
# baseTime - Base time expressed in seconds from the Posix epoch
# changeover - Julian day on which the Gregorian calendar was
# adpoted in the target locale.
#
# Results:
# Returns the given dictionary augmented with a 'julianDay' field
# that contains the base day.
#
# Side effects:
# None.
#
#----------------------------------------------------------------------
proc ::tcl::clock::AssignBaseJulianDay { date baseTime timeZone changeover } {
variable TZData
# Find the Julian Day Number corresponding to the base time
set date2 [GetDateFields $baseTime $TZData($timeZone) $changeover]
dict set date julianDay [dict get $date2 julianDay]
return $date
}
#----------------------------------------------------------------------
#
# InterpretHMSP --
#
# Interprets a time in the form "hh:mm:ss am".
#
# Parameters:
# date -- Dictionary containing "hourAMPM", "minute", "second"
# and "amPmIndicator" fields.
#
# Results:
# Returns the number of seconds from local midnight.
#
# Side effects:
# None.
#
#----------------------------------------------------------------------
proc ::tcl::clock::InterpretHMSP { date } {
set hr [dict get $date hourAMPM]
if { $hr == 12 } {
set hr 0
}
if { [dict get $date amPmIndicator] } {
incr hr 12
}
dict set date hour $hr
return [InterpretHMS $date[set date {}]]
}
#----------------------------------------------------------------------
#
# InterpretHMS --
#
# Interprets a 24-hour time "hh:mm:ss"
#
# Parameters:
# date -- Dictionary containing the "hour", "minute" and "second"
# fields.
#
# Results:
# Returns the given dictionary augmented with a "secondOfDay"
# field containing the number of seconds from local midnight.
#
# Side effects:
# None.
#
#----------------------------------------------------------------------
proc ::tcl::clock::InterpretHMS { date } {
return [expr {
( [dict get $date hour] * 60
+ [dict get $date minute] ) * 60
+ [dict get $date second]
}]
}
#----------------------------------------------------------------------
#
# GetSystemTimeZone --
#
# Determines the system time zone, which is the default for the
# 'clock' command if no other zone is supplied.
#
# Parameters:
# None.
#
# Results:
# Returns the system time zone.
#
# Side effects:
# Stores the sustem time zone in the 'CachedSystemTimeZone'
# variable, since determining it may be an expensive process.
#
#----------------------------------------------------------------------
proc ::tcl::clock::GetSystemTimeZone {} {
variable CachedSystemTimeZone
variable TimeZoneBad
if {[set result [getenv TCL_TZ]] ne {}} {
set timezone $result
} elseif {[set result [getenv TZ]] ne {}} {
set timezone $result
}
if {![info exists timezone]} {
# Cache the time zone only if it was detected by one of the
# expensive methods.
if { [info exists CachedSystemTimeZone] } {
set timezone $CachedSystemTimeZone
} elseif { $::tcl_platform(platform) eq {windows} } {
set timezone [GuessWindowsTimeZone]
} elseif { [file exists /etc/localtime]
&& ![catch {ReadZoneinfoFile \
Tcl/Localtime /etc/localtime}] } {
set timezone :Tcl/Localtime
} else {
set timezone :localtime
}
set CachedSystemTimeZone $timezone
}
if { ![dict exists $TimeZoneBad $timezone] } {
dict set TimeZoneBad $timezone [catch {SetupTimeZone $timezone}]
}
if { [dict get $TimeZoneBad $timezone] } {
return :localtime
} else {
return $timezone
}
}
#----------------------------------------------------------------------
#
# ConvertLegacyTimeZone --
#
# Given an alphanumeric time zone identifier and the system time zone,
# convert the alphanumeric identifier to an unambiguous time zone.
#
# Parameters:
# tzname - Name of the time zone to convert
#
# Results:
# Returns a time zone name corresponding to tzname, but in an
# unambiguous form, generally +hhmm.
#
# This procedure is implemented primarily to allow the parsing of RFC822
# date/time strings. Processing a time zone name on input is not recommended
# practice, because there is considerable room for ambiguity; for instance, is
# BST Brazilian Standard Time, or British Summer Time?
#
#----------------------------------------------------------------------
proc ::tcl::clock::ConvertLegacyTimeZone { tzname } {
variable LegacyTimeZone
set tzname [string tolower $tzname]
if { ![dict exists $LegacyTimeZone $tzname] } {
return -code error -errorcode [list CLOCK badTZName $tzname] \
"time zone \"$tzname\" not found"
}
return [dict get $LegacyTimeZone $tzname]
}
#----------------------------------------------------------------------
#
# SetupTimeZone --
#
# Given the name or specification of a time zone, sets up its in-memory
# data.
#
# Parameters:
# tzname - Name of a time zone
#
# Results:
# Unless the time zone is ':localtime', sets the TZData array to contain
# the lookup table for local<->UTC conversion. Returns an error if the
# time zone cannot be parsed.
#
#----------------------------------------------------------------------
proc ::tcl::clock::SetupTimeZone { timezone } {
variable TZData
if {! [info exists TZData($timezone)] } {
variable MINWIDE
if { $timezone eq {:localtime} } {
# Nothing to do, we'll convert using the localtime function
} elseif {
[regexp {^([-+])(\d\d)(?::?(\d\d)(?::?(\d\d))?)?} $timezone \
-> s hh mm ss]
} then {
# Make a fixed offset
::scan $hh %d hh
if { $mm eq {} } {
set mm 0
} else {
::scan $mm %d mm
}
if { $ss eq {} } {
set ss 0
} else {
::scan $ss %d ss
}
set offset [expr { ( $hh * 60 + $mm ) * 60 + $ss }]
if { $s eq {-} } {
set offset [expr { - $offset }]
}
set TZData($timezone) [list [list $MINWIDE $offset -1 $timezone]]
} elseif { [string index $timezone 0] eq {:} } {
# Convert using a time zone file
if {
[catch {
LoadTimeZoneFile [string range $timezone 1 end]
}] && [catch {
LoadZoneinfoFile [string range $timezone 1 end]
}]
} then {
return -code error \
-errorcode [list CLOCK badTimeZone $timezone] \
"time zone \"$timezone\" not found"
}
} elseif { ![catch {ParsePosixTimeZone $timezone} tzfields] } {
# This looks like a POSIX time zone - try to process it
if { [catch {ProcessPosixTimeZone $tzfields} data opts] } {
if { [lindex [dict get $opts -errorcode] 0] eq {CLOCK} } {
dict unset opts -errorinfo
}
return -options $opts $data
} else {
set TZData($timezone) $data
}
} else {
# We couldn't parse this as a POSIX time zone. Try again with a
# time zone file - this time without a colon
if { [catch { LoadTimeZoneFile $timezone }]
&& [catch { LoadZoneinfoFile $timezone } - opts] } {
dict unset opts -errorinfo
return -options $opts "time zone $timezone not found"
}
set TZData($timezone) $TZData(:$timezone)
}
}
return
}
#----------------------------------------------------------------------
#
# GuessWindowsTimeZone --
#
# Determines the system time zone on windows.
#
# Parameters:
# None.
#
# Results:
# Returns a time zone specifier that corresponds to the system time zone
# information found in the Registry.
#
# Bugs:
# Fixed dates for DST change are unimplemented at present, because no
# time zone information supplied with Windows actually uses them!
#
# On a Windows system where neither $env(TCL_TZ) nor $env(TZ) is specified,
# GuessWindowsTimeZone looks in the Registry for the system time zone
# information. It then attempts to find an entry in WinZoneInfo for a time
# zone that uses the same rules. If it finds one, it returns it; otherwise,
# it constructs a Posix-style time zone string and returns that.
#
#----------------------------------------------------------------------
proc ::tcl::clock::GuessWindowsTimeZone {} {
variable WinZoneInfo
variable NoRegistry
variable TimeZoneBad
if { [info exists NoRegistry] } {
return :localtime
}
# Dredge time zone information out of the registry
if { [catch {
set rpath HKEY_LOCAL_MACHINE\\System\\CurrentControlSet\\Control\\TimeZoneInformation
set data [list \
[expr { -60
* [registry get $rpath Bias] }] \
[expr { -60
* [registry get $rpath StandardBias] }] \
[expr { -60 \
* [registry get $rpath DaylightBias] }]]
set stdtzi [registry get $rpath StandardStart]
foreach ind {0 2 14 4 6 8 10 12} {
binary scan $stdtzi @${ind}s val
lappend data $val
}
set daytzi [registry get $rpath DaylightStart]
foreach ind {0 2 14 4 6 8 10 12} {
binary scan $daytzi @${ind}s val
lappend data $val
}
}] } {
# Missing values in the Registry - bail out
return :localtime
}
# Make up a Posix time zone specifier if we can't find one. Check here
# that the tzdata file exists, in case we're running in an environment
# (e.g. starpack) where tzdata is incomplete. (Bug 1237907)
if { [dict exists $WinZoneInfo $data] } {
set tzname [dict get $WinZoneInfo $data]
if { ! [dict exists $TimeZoneBad $tzname] } {
dict set TimeZoneBad $tzname [catch {SetupTimeZone $tzname}]
}
} else {
set tzname {}
}
if { $tzname eq {} || [dict get $TimeZoneBad $tzname] } {
lassign $data \
bias stdBias dstBias \
stdYear stdMonth stdDayOfWeek stdDayOfMonth \
stdHour stdMinute stdSecond stdMillisec \
dstYear dstMonth dstDayOfWeek dstDayOfMonth \
dstHour dstMinute dstSecond dstMillisec
set stdDelta [expr { $bias + $stdBias }]
set dstDelta [expr { $bias + $dstBias }]
if { $stdDelta <= 0 } {
set stdSignum +
set stdDelta [expr { - $stdDelta }]
set dispStdSignum -
} else {
set stdSignum -
set dispStdSignum +
}
set hh [::format %02d [expr { $stdDelta / 3600 }]]
set mm [::format %02d [expr { ($stdDelta / 60 ) % 60 }]]
set ss [::format %02d [expr { $stdDelta % 60 }]]
set tzname {}
append tzname < $dispStdSignum $hh $mm > $stdSignum $hh : $mm : $ss
if { $stdMonth >= 0 } {
if { $dstDelta <= 0 } {
set dstSignum +
set dstDelta [expr { - $dstDelta }]
set dispDstSignum -
} else {
set dstSignum -
set dispDstSignum +
}
set hh [::format %02d [expr { $dstDelta / 3600 }]]
set mm [::format %02d [expr { ($dstDelta / 60 ) % 60 }]]
set ss [::format %02d [expr { $dstDelta % 60 }]]
append tzname < $dispDstSignum $hh $mm > $dstSignum $hh : $mm : $ss
if { $dstYear == 0 } {
append tzname ,M $dstMonth . $dstDayOfMonth . $dstDayOfWeek
} else {
# I have not been able to find any locale on which Windows
# converts time zone on a fixed day of the year, hence don't
# know how to interpret the fields. If someone can inform me,
# I'd be glad to code it up. For right now, we bail out in
# such a case.
return :localtime
}
append tzname / [::format %02d $dstHour] \
: [::format %02d $dstMinute] \
: [::format %02d $dstSecond]
if { $stdYear == 0 } {
append tzname ,M $stdMonth . $stdDayOfMonth . $stdDayOfWeek
} else {
# I have not been able to find any locale on which Windows
# converts time zone on a fixed day of the year, hence don't
# know how to interpret the fields. If someone can inform me,
# I'd be glad to code it up. For right now, we bail out in
# such a case.
return :localtime
}
append tzname / [::format %02d $stdHour] \
: [::format %02d $stdMinute] \
: [::format %02d $stdSecond]
}
dict set WinZoneInfo $data $tzname
}
return [dict get $WinZoneInfo $data]
}
#----------------------------------------------------------------------
#
# LoadTimeZoneFile --
#
# Load the data file that specifies the conversion between a
# given time zone and Greenwich.
#
# Parameters:
# fileName -- Name of the file to load
#
# Results:
# None.
#
# Side effects:
# TZData(:fileName) contains the time zone data
#
#----------------------------------------------------------------------
proc ::tcl::clock::LoadTimeZoneFile { fileName } {
variable DataDir
variable TZData
if { [info exists TZData($fileName)] } {
return
}
# Since an unsafe interp uses the [clock] command in the master, this code
# is security sensitive. Make sure that the path name cannot escape the
# given directory.
if { ![regexp {^[[.-.][:alpha:]_]+(?:/[[.-.][:alpha:]_]+)*$} $fileName] } {
return -code error \
-errorcode [list CLOCK badTimeZone $:fileName] \
"time zone \":$fileName\" not valid"
}
try {
source -encoding utf-8 [file join $DataDir $fileName]
} on error {} {
return -code error \
-errorcode [list CLOCK badTimeZone :$fileName] \
"time zone \":$fileName\" not found"
}
return
}
#----------------------------------------------------------------------
#
# LoadZoneinfoFile --
#
# Loads a binary time zone information file in Olson format.
#
# Parameters:
# fileName - Relative path name of the file to load.
#
# Results:
# Returns an empty result normally; returns an error if no Olson file
# was found or the file was malformed in some way.
#
# Side effects:
# TZData(:fileName) contains the time zone data
#
#----------------------------------------------------------------------
proc ::tcl::clock::LoadZoneinfoFile { fileName } {
variable ZoneinfoPaths
# Since an unsafe interp uses the [clock] command in the master, this code
# is security sensitive. Make sure that the path name cannot escape the
# given directory.
if { ![regexp {^[[.-.][:alpha:]_]+(?:/[[.-.][:alpha:]_]+)*$} $fileName] } {
return -code error \
-errorcode [list CLOCK badTimeZone $:fileName] \
"time zone \":$fileName\" not valid"
}
foreach d $ZoneinfoPaths {
set fname [file join $d $fileName]
if { [file readable $fname] && [file isfile $fname] } {
break
}
unset fname
}
ReadZoneinfoFile $fileName $fname
}
#----------------------------------------------------------------------
#
# ReadZoneinfoFile --
#
# Loads a binary time zone information file in Olson format.
#
# Parameters:
# fileName - Name of the time zone (relative path name of the
# file).
# fname - Absolute path name of the file.
#
# Results:
# Returns an empty result normally; returns an error if no Olson file
# was found or the file was malformed in some way.
#
# Side effects:
# TZData(:fileName) contains the time zone data
#
#----------------------------------------------------------------------
proc ::tcl::clock::ReadZoneinfoFile {fileName fname} {
variable MINWIDE
variable TZData
if { ![file exists $fname] } {
return -code error "$fileName not found"
}
if { [file size $fname] > 262144 } {
return -code error "$fileName too big"
}
# Suck in all the data from the file
set f [open $fname r]
fconfigure $f -translation binary
set d [read $f]
close $f
# The file begins with a magic number, sixteen reserved bytes, and then
# six 4-byte integers giving counts of fileds in the file.
binary scan $d a4a1x15IIIIII \
magic version nIsGMT nIsStd nLeap nTime nType nChar
set seek 44
set ilen 4
set iformat I
if { $magic != {TZif} } {
return -code error "$fileName not a time zone information file"
}
if { $nType > 255 } {
return -code error "$fileName contains too many time types"
}
# Accept only Posix-style zoneinfo. Sorry, 'leaps' bigots.
if { $nLeap != 0 } {
return -code error "$fileName contains leap seconds"
}
# In a version 2 file, we use the second part of the file, which contains
# 64-bit transition times.
if {$version eq "2"} {
set seek [expr {
44
+ 5 * $nTime
+ 6 * $nType
+ 4 * $nLeap
+ $nIsStd
+ $nIsGMT
+ $nChar
}]
binary scan $d @${seek}a4a1x15IIIIII \
magic version nIsGMT nIsStd nLeap nTime nType nChar
if {$magic ne {TZif}} {
return -code error "seek address $seek miscomputed, magic = $magic"
}
set iformat W
set ilen 8
incr seek 44
}
# Next come ${nTime} transition times, followed by ${nTime} time type
# codes. The type codes are unsigned 1-byte quantities. We insert an
# arbitrary start time in front of the transitions.
binary scan $d @${seek}${iformat}${nTime}c${nTime} times tempCodes
incr seek [expr { ($ilen + 1) * $nTime }]
set times [linsert $times 0 $MINWIDE]
set codes {}
foreach c $tempCodes {
lappend codes [expr { $c & 0xff }]
}
set codes [linsert $codes 0 0]
# Next come ${nType} time type descriptions, each of which has an offset
# (seconds east of GMT), a DST indicator, and an index into the
# abbreviation text.
for { set i 0 } { $i < $nType } { incr i } {
binary scan $d @${seek}Icc gmtOff isDst abbrInd
lappend types [list $gmtOff $isDst $abbrInd]
incr seek 6
}
# Next come $nChar characters of time zone name abbreviations, which are
# null-terminated.
# We build them up into a dictionary indexed by character index, because
# that's what's in the indices above.
binary scan $d @${seek}a${nChar} abbrs
incr seek ${nChar}
set abbrList [split $abbrs \0]
set i 0
set abbrevs {}
foreach a $abbrList {
for {set j 0} {$j <= [string length $a]} {incr j} {
dict set abbrevs $i [string range $a $j end]
incr i
}
}
# Package up a list of tuples, each of which contains transition time,
# seconds east of Greenwich, DST flag and time zone abbreviation.
set r {}
set lastTime $MINWIDE
foreach t $times c $codes {
if { $t < $lastTime } {
return -code error "$fileName has times out of order"
}
set lastTime $t
lassign [lindex $types $c] gmtoff isDst abbrInd
set abbrev [dict get $abbrevs $abbrInd]
lappend r [list $t $gmtoff $isDst $abbrev]
}
# In a version 2 file, there is also a POSIX-style time zone description
# at the very end of the file. To get to it, skip over nLeap leap second
# values (8 bytes each),
# nIsStd standard/DST indicators and nIsGMT UTC/local indicators.
if {$version eq {2}} {
set seek [expr {$seek + 8 * $nLeap + $nIsStd + $nIsGMT + 1}]
set last [string first \n $d $seek]
set posix [string range $d $seek [expr {$last-1}]]
if {[llength $posix] > 0} {
set posixFields [ParsePosixTimeZone $posix]
foreach tuple [ProcessPosixTimeZone $posixFields] {
lassign $tuple t gmtoff isDst abbrev
if {$t > $lastTime} {
lappend r $tuple
}
}
}
}
set TZData(:$fileName) $r
return
}
#----------------------------------------------------------------------
#
# ParsePosixTimeZone --
#
# Parses the TZ environment variable in Posix form
#
# Parameters:
# tz Time zone specifier to be interpreted
#
# Results:
# Returns a dictionary whose values contain the various pieces of the
# time zone specification.
#
# Side effects:
# None.
#
# Errors:
# Throws an error if the syntax of the time zone is incorrect.
#
# The following keys are present in the dictionary:
# stdName - Name of the time zone when Daylight Saving Time
# is not in effect.
# stdSignum - Sign (+, -, or empty) of the offset from Greenwich
# to the given (non-DST) time zone. + and the empty
# string denote zones west of Greenwich, - denotes east
# of Greenwich; this is contrary to the ISO convention
# but follows Posix.
# stdHours - Hours part of the offset from Greenwich to the given
# (non-DST) time zone.
# stdMinutes - Minutes part of the offset from Greenwich to the
# given (non-DST) time zone. Empty denotes zero.
# stdSeconds - Seconds part of the offset from Greenwich to the
# given (non-DST) time zone. Empty denotes zero.
# dstName - Name of the time zone when DST is in effect, or the
# empty string if the time zone does not observe Daylight
# Saving Time.
# dstSignum, dstHours, dstMinutes, dstSeconds -
# Fields corresponding to stdSignum, stdHours, stdMinutes,
# stdSeconds for the Daylight Saving Time version of the
# time zone. If dstHours is empty, it is presumed to be 1.
# startDayOfYear - The ordinal number of the day of the year on which
# Daylight Saving Time begins. If this field is
# empty, then DST begins on a given month-week-day,
# as below.
# startJ - The letter J, or an empty string. If a J is present in
# this field, then startDayOfYear does not count February 29
# even in leap years.
# startMonth - The number of the month in which Daylight Saving Time
# begins, supplied if startDayOfYear is empty. If both
# startDayOfYear and startMonth are empty, then US rules
# are presumed.
# startWeekOfMonth - The number of the week in the month in which
# Daylight Saving Time begins, in the range 1-5.
# 5 denotes the last week of the month even in a
# 4-week month.
# startDayOfWeek - The number of the day of the week (Sunday=0,
# Saturday=6) on which Daylight Saving Time begins.
# startHours - The hours part of the time of day at which Daylight
# Saving Time begins. An empty string is presumed to be 2.
# startMinutes - The minutes part of the time of day at which DST begins.
# An empty string is presumed zero.
# startSeconds - The seconds part of the time of day at which DST begins.
# An empty string is presumed zero.
# endDayOfYear, endJ, endMonth, endWeekOfMonth, endDayOfWeek,
# endHours, endMinutes, endSeconds -
# Specify the end of DST in the same way that the start* fields
# specify the beginning of DST.
#
# This procedure serves only to break the time specifier into fields. No
# attempt is made to canonicalize the fields or supply default values.
#
#----------------------------------------------------------------------
proc ::tcl::clock::ParsePosixTimeZone { tz } {
if {[regexp -expanded -nocase -- {
^
# 1 - Standard time zone name
([[:alpha:]]+ | <[-+[:alnum:]]+>)
# 2 - Standard time zone offset, signum
([-+]?)
# 3 - Standard time zone offset, hours
([[:digit:]]{1,2})
(?:
# 4 - Standard time zone offset, minutes
: ([[:digit:]]{1,2})
(?:
# 5 - Standard time zone offset, seconds
: ([[:digit:]]{1,2} )
)?
)?
(?:
# 6 - DST time zone name
([[:alpha:]]+ | <[-+[:alnum:]]+>)
(?:
(?:
# 7 - DST time zone offset, signum
([-+]?)
# 8 - DST time zone offset, hours
([[:digit:]]{1,2})
(?:
# 9 - DST time zone offset, minutes
: ([[:digit:]]{1,2})
(?:
# 10 - DST time zone offset, seconds
: ([[:digit:]]{1,2})
)?
)?
)?
(?:
,
(?:
# 11 - Optional J in n and Jn form 12 - Day of year
( J ? ) ( [[:digit:]]+ )
| M
# 13 - Month number 14 - Week of month 15 - Day of week
( [[:digit:]] + )
[.] ( [[:digit:]] + )
[.] ( [[:digit:]] + )
)
(?:
# 16 - Start time of DST - hours
/ ( [[:digit:]]{1,2} )
(?:
# 17 - Start time of DST - minutes
: ( [[:digit:]]{1,2} )
(?:
# 18 - Start time of DST - seconds
: ( [[:digit:]]{1,2} )
)?
)?
)?
,
(?:
# 19 - Optional J in n and Jn form 20 - Day of year
( J ? ) ( [[:digit:]]+ )
| M
# 21 - Month number 22 - Week of month 23 - Day of week
( [[:digit:]] + )
[.] ( [[:digit:]] + )
[.] ( [[:digit:]] + )
)
(?:
# 24 - End time of DST - hours
/ ( [[:digit:]]{1,2} )
(?:
# 25 - End time of DST - minutes
: ( [[:digit:]]{1,2} )
(?:
# 26 - End time of DST - seconds
: ( [[:digit:]]{1,2} )
)?
)?
)?
)?
)?
)?
$
} $tz -> x(stdName) x(stdSignum) x(stdHours) x(stdMinutes) x(stdSeconds) \
x(dstName) x(dstSignum) x(dstHours) x(dstMinutes) x(dstSeconds) \
x(startJ) x(startDayOfYear) \
x(startMonth) x(startWeekOfMonth) x(startDayOfWeek) \
x(startHours) x(startMinutes) x(startSeconds) \
x(endJ) x(endDayOfYear) \
x(endMonth) x(endWeekOfMonth) x(endDayOfWeek) \
x(endHours) x(endMinutes) x(endSeconds)] } {
# it's a good timezone
return [array get x]
}
return -code error\
-errorcode [list CLOCK badTimeZone $tz] \
"unable to parse time zone specification \"$tz\""
}
#----------------------------------------------------------------------
#
# ProcessPosixTimeZone --
#
# Handle a Posix time zone after it's been broken out into fields.
#
# Parameters:
# z - Dictionary returned from 'ParsePosixTimeZone'
#
# Results:
# Returns time zone information for the 'TZData' array.
#
# Side effects:
# None.
#
#----------------------------------------------------------------------
proc ::tcl::clock::ProcessPosixTimeZone { z } {
variable MINWIDE
variable TZData
# Determine the standard time zone name and seconds east of Greenwich
set stdName [dict get $z stdName]
if { [string index $stdName 0] eq {<} } {
set stdName [string range $stdName 1 end-1]
}
if { [dict get $z stdSignum] eq {-} } {
set stdSignum +1
} else {
set stdSignum -1
}
set stdHours [lindex [::scan [dict get $z stdHours] %d] 0]
if { [dict get $z stdMinutes] ne {} } {
set stdMinutes [lindex [::scan [dict get $z stdMinutes] %d] 0]
} else {
set stdMinutes 0
}
if { [dict get $z stdSeconds] ne {} } {
set stdSeconds [lindex [::scan [dict get $z stdSeconds] %d] 0]
} else {
set stdSeconds 0
}
set stdOffset [expr {
(($stdHours * 60 + $stdMinutes) * 60 + $stdSeconds) * $stdSignum
}]
set data [list [list $MINWIDE $stdOffset 0 $stdName]]
# If there's no daylight zone, we're done
set dstName [dict get $z dstName]
if { $dstName eq {} } {
return $data
}
if { [string index $dstName 0] eq {<} } {
set dstName [string range $dstName 1 end-1]
}
# Determine the daylight name
if { [dict get $z dstSignum] eq {-} } {
set dstSignum +1
} else {
set dstSignum -1
}
if { [dict get $z dstHours] eq {} } {
set dstOffset [expr { 3600 + $stdOffset }]
} else {
set dstHours [lindex [::scan [dict get $z dstHours] %d] 0]
if { [dict get $z dstMinutes] ne {} } {
set dstMinutes [lindex [::scan [dict get $z dstMinutes] %d] 0]
} else {
set dstMinutes 0
}
if { [dict get $z dstSeconds] ne {} } {
set dstSeconds [lindex [::scan [dict get $z dstSeconds] %d] 0]
} else {
set dstSeconds 0
}
set dstOffset [expr {
(($dstHours*60 + $dstMinutes) * 60 + $dstSeconds) * $dstSignum
}]
}
# Fill in defaults for European or US DST rules
# US start time is the second Sunday in March
# EU start time is the last Sunday in March
# US end time is the first Sunday in November.
# EU end time is the last Sunday in October
if {
[dict get $z startDayOfYear] eq {}
&& [dict get $z startMonth] eq {}
} then {
if {($stdSignum * $stdHours>=0) && ($stdSignum * $stdHours<=12)} {
# EU
dict set z startWeekOfMonth 5
if {$stdHours>2} {
dict set z startHours 2
} else {
dict set z startHours [expr {$stdHours+1}]
}
} else {
# US
dict set z startWeekOfMonth 2
dict set z startHours 2
}
dict set z startMonth 3
dict set z startDayOfWeek 0
dict set z startMinutes 0
dict set z startSeconds 0
}
if {
[dict get $z endDayOfYear] eq {}
&& [dict get $z endMonth] eq {}
} then {
if {($stdSignum * $stdHours>=0) && ($stdSignum * $stdHours<=12)} {
# EU
dict set z endMonth 10
dict set z endWeekOfMonth 5
if {$stdHours>2} {
dict set z endHours 3
} else {
dict set z endHours [expr {$stdHours+2}]
}
} else {
# US
dict set z endMonth 11
dict set z endWeekOfMonth 1
dict set z endHours 2
}
dict set z endDayOfWeek 0
dict set z endMinutes 0
dict set z endSeconds 0
}
# Put DST in effect in all years from 1916 to 2099.
for { set y 1916 } { $y < 2100 } { incr y } {
set startTime [DeterminePosixDSTTime $z start $y]
incr startTime [expr { - wide($stdOffset) }]
set endTime [DeterminePosixDSTTime $z end $y]
incr endTime [expr { - wide($dstOffset) }]
if { $startTime < $endTime } {
lappend data \
[list $startTime $dstOffset 1 $dstName] \
[list $endTime $stdOffset 0 $stdName]
} else {
lappend data \
[list $endTime $stdOffset 0 $stdName] \
[list $startTime $dstOffset 1 $dstName]
}
}
return $data
}
#----------------------------------------------------------------------
#
# DeterminePosixDSTTime --
#
# Determines the time that Daylight Saving Time starts or ends from a
# Posix time zone specification.
#
# Parameters:
# z - Time zone data returned from ParsePosixTimeZone.
# Missing fields are expected to be filled in with
# default values.
# bound - The word 'start' or 'end'
# y - The year for which the transition time is to be determined.
#
# Results:
# Returns the transition time as a count of seconds from the epoch. The
# time is relative to the wall clock, not UTC.
#
#----------------------------------------------------------------------
proc ::tcl::clock::DeterminePosixDSTTime { z bound y } {
variable FEB_28
# Determine the start or end day of DST
set date [dict create era CE year $y]
set doy [dict get $z ${bound}DayOfYear]
if { $doy ne {} } {
# Time was specified as a day of the year
if { [dict get $z ${bound}J] ne {}
&& [IsGregorianLeapYear $y]
&& ( $doy > $FEB_28 ) } {
incr doy
}
dict set date dayOfYear $doy
set date [GetJulianDayFromEraYearDay $date[set date {}] 2361222]
} else {
# Time was specified as a day of the week within a month
dict set date month [dict get $z ${bound}Month]
dict set date dayOfWeek [dict get $z ${bound}DayOfWeek]
set dowim [dict get $z ${bound}WeekOfMonth]
if { $dowim >= 5 } {
set dowim -1
}
dict set date dayOfWeekInMonth $dowim
set date [GetJulianDayFromEraYearMonthWeekDay $date[set date {}] 2361222]
}
set jd [dict get $date julianDay]
set seconds [expr {
wide($jd) * wide(86400) - wide(210866803200)
}]
set h [dict get $z ${bound}Hours]
if { $h eq {} } {
set h 2
} else {
set h [lindex [::scan $h %d] 0]
}
set m [dict get $z ${bound}Minutes]
if { $m eq {} } {
set m 0
} else {
set m [lindex [::scan $m %d] 0]
}
set s [dict get $z ${bound}Seconds]
if { $s eq {} } {
set s 0
} else {
set s [lindex [::scan $s %d] 0]
}
set tod [expr { ( $h * 60 + $m ) * 60 + $s }]
return [expr { $seconds + $tod }]
}
#----------------------------------------------------------------------
#
# GetLocaleEra --
#
# Given local time expressed in seconds from the Posix epoch,
# determine localized era and year within the era.
#
# Parameters:
# date - Dictionary that must contain the keys, 'localSeconds',
# whose value is expressed as the appropriate local time;
# and 'year', whose value is the Gregorian year.
# etable - Value of the LOCALE_ERAS key in the message catalogue
# for the target locale.
#
# Results:
# Returns the dictionary, augmented with the keys, 'localeEra' and
# 'localeYear'.
#
#----------------------------------------------------------------------
proc ::tcl::clock::GetLocaleEra { date etable } {
set index [BSearch $etable [dict get $date localSeconds]]
if { $index < 0} {
dict set date localeEra \
[::format %02d [expr { [dict get $date year] / 100 }]]
dict set date localeYear [expr {
[dict get $date year] % 100
}]
} else {
dict set date localeEra [lindex $etable $index 1]
dict set date localeYear [expr {
[dict get $date year] - [lindex $etable $index 2]
}]
}
return $date
}
#----------------------------------------------------------------------
#
# GetJulianDayFromEraYearDay --
#
# Given a year, month and day on the Gregorian calendar, determines
# the Julian Day Number beginning at noon on that date.
#
# Parameters:
# date -- A dictionary in which the 'era', 'year', and
# 'dayOfYear' slots are populated. The calendar in use
# is determined by the date itself relative to:
# changeover -- Julian day on which the Gregorian calendar was
# adopted in the current locale.
#
# Results:
# Returns the given dictionary augmented with a 'julianDay' key whose
# value is the desired Julian Day Number, and a 'gregorian' key that
# specifies whether the calendar is Gregorian (1) or Julian (0).
#
# Side effects:
# None.
#
# Bugs:
# This code needs to be moved to the C layer.
#
#----------------------------------------------------------------------
proc ::tcl::clock::GetJulianDayFromEraYearDay {date changeover} {
# Get absolute year number from the civil year
switch -exact -- [dict get $date era] {
BCE {
set year [expr { 1 - [dict get $date year] }]
}
CE {
set year [dict get $date year]
}
}
set ym1 [expr { $year - 1 }]
# Try the Gregorian calendar first.
dict set date gregorian 1
set jd [expr {
1721425
+ [dict get $date dayOfYear]
+ ( 365 * $ym1 )
+ ( $ym1 / 4 )
- ( $ym1 / 100 )
+ ( $ym1 / 400 )
}]
# If the date is before the Gregorian change, use the Julian calendar.
if { $jd < $changeover } {
dict set date gregorian 0
set jd [expr {
1721423
+ [dict get $date dayOfYear]
+ ( 365 * $ym1 )
+ ( $ym1 / 4 )
}]
}
dict set date julianDay $jd
return $date
}
#----------------------------------------------------------------------
#
# GetJulianDayFromEraYearMonthWeekDay --
#
# Determines the Julian Day number corresponding to the nth given
# day-of-the-week in a given month.
#
# Parameters:
# date - Dictionary containing the keys, 'era', 'year', 'month'
# 'weekOfMonth', 'dayOfWeek', and 'dayOfWeekInMonth'.
# changeover - Julian Day of adoption of the Gregorian calendar
#
# Results:
# Returns the given dictionary, augmented with a 'julianDay' key.
#
# Side effects:
# None.
#
# Bugs:
# This code needs to be moved to the C layer.
#
#----------------------------------------------------------------------
proc ::tcl::clock::GetJulianDayFromEraYearMonthWeekDay {date changeover} {
# Come up with a reference day; either the zeroeth day of the given month
# (dayOfWeekInMonth >= 0) or the seventh day of the following month
# (dayOfWeekInMonth < 0)
set date2 $date
set week [dict get $date dayOfWeekInMonth]
if { $week >= 0 } {
dict set date2 dayOfMonth 0
} else {
dict incr date2 month
dict set date2 dayOfMonth 7
}
set date2 [GetJulianDayFromEraYearMonthDay $date2[set date2 {}] \
$changeover]
set wd0 [WeekdayOnOrBefore [dict get $date dayOfWeek] \
[dict get $date2 julianDay]]
dict set date julianDay [expr { $wd0 + 7 * $week }]
return $date
}
#----------------------------------------------------------------------
#
# IsGregorianLeapYear --
#
# Determines whether a given date represents a leap year in the
# Gregorian calendar.
#
# Parameters:
# date -- The date to test. The fields, 'era', 'year' and 'gregorian'
# must be set.
#
# Results:
# Returns 1 if the year is a leap year, 0 otherwise.
#
# Side effects:
# None.
#
#----------------------------------------------------------------------
proc ::tcl::clock::IsGregorianLeapYear { date } {
switch -exact -- [dict get $date era] {
BCE {
set year [expr { 1 - [dict get $date year]}]
}
CE {
set year [dict get $date year]
}
}
if { $year % 4 != 0 } {
return 0
} elseif { ![dict get $date gregorian] } {
return 1
} elseif { $year % 400 == 0 } {
return 1
} elseif { $year % 100 == 0 } {
return 0
} else {
return 1
}
}
#----------------------------------------------------------------------
#
# WeekdayOnOrBefore --
#
# Determine the nearest day of week (given by the 'weekday' parameter,
# Sunday==0) on or before a given Julian Day.
#
# Parameters:
# weekday -- Day of the week
# j -- Julian Day number
#
# Results:
# Returns the Julian Day Number of the desired date.
#
# Side effects:
# None.
#
#----------------------------------------------------------------------
proc ::tcl::clock::WeekdayOnOrBefore { weekday j } {
set k [expr { ( $weekday + 6 ) % 7 }]
return [expr { $j - ( $j - $k ) % 7 }]
}
#----------------------------------------------------------------------
#
# BSearch --
#
# Service procedure that does binary search in several places inside the
# 'clock' command.
#
# Parameters:
# list - List of lists, sorted in ascending order by the
# first elements
# key - Value to search for
#
# Results:
# Returns the index of the greatest element in $list that is less than
# or equal to $key.
#
# Side effects:
# None.
#
#----------------------------------------------------------------------
proc ::tcl::clock::BSearch { list key } {
if {[llength $list] == 0} {
return -1
}
if { $key < [lindex $list 0 0] } {
return -1
}
set l 0
set u [expr { [llength $list] - 1 }]
while { $l < $u } {
# At this point, we know that
# $k >= [lindex $list $l 0]
# Either $u == [llength $list] or else $k < [lindex $list $u+1 0]
# We find the midpoint of the interval {l,u} rounded UP, compare
# against it, and set l or u to maintain the invariant. Note that the
# interval shrinks at each step, guaranteeing convergence.
set m [expr { ( $l + $u + 1 ) / 2 }]
if { $key >= [lindex $list $m 0] } {
set l $m
} else {
set u [expr { $m - 1 }]
}
}
return $l
}
#----------------------------------------------------------------------
#
# clock add --
#
# Adds an offset to a given time.
#
# Syntax:
# clock add clockval ?count unit?... ?-option value?
#
# Parameters:
# clockval -- Starting time value
# count -- Amount of a unit of time to add
# unit -- Unit of time to add, must be one of:
# years year months month weeks week
# days day hours hour minutes minute
# seconds second
#
# Options:
# -gmt BOOLEAN
# (Deprecated) Flag synonymous with '-timezone :GMT'
# -timezone ZONE
# Name of the time zone in which calculations are to be done.
# -locale NAME
# Name of the locale in which calculations are to be done.
# Used to determine the Gregorian change date.
#
# Results:
# Returns the given time adjusted by the given offset(s) in
# order.
#
# Notes:
# It is possible that adding a number of months or years will adjust the
# day of the month as well. For instance, the time at one month after
# 31 January is either 28 or 29 February, because February has fewer
# than 31 days.
#
#----------------------------------------------------------------------
proc ::tcl::clock::add { clockval args } {
if { [llength $args] % 2 != 0 } {
set cmdName "clock add"
return -code error \
-errorcode [list CLOCK wrongNumArgs] \
"wrong \# args: should be\
\"$cmdName clockval ?number units?...\
?-gmt boolean? ?-locale LOCALE? ?-timezone ZONE?\""
}
if { [catch { expr {wide($clockval)} } result] } {
return -code error $result
}
set offsets {}
set gmt 0
set locale c
set timezone [GetSystemTimeZone]
foreach { a b } $args {
if { [string is integer -strict $a] } {
lappend offsets $a $b
} else {
switch -exact -- $a {
-g - -gm - -gmt {
set gmt $b
}
-l - -lo - -loc - -loca - -local - -locale {
set locale [string tolower $b]
}
-t - -ti - -tim - -time - -timez - -timezo - -timezon -
-timezone {
set timezone $b
}
default {
throw [list CLOCK badOption $a] \
"bad option \"$a\",\
must be -gmt, -locale or -timezone"
}
}
}
}
# Check options for validity
if { [info exists saw(-gmt)] && [info exists saw(-timezone)] } {
return -code error \
-errorcode [list CLOCK gmtWithTimezone] \
"cannot use -gmt and -timezone in same call"
}
if { [catch { expr { wide($clockval) } } result] } {
return -code error "expected integer but got \"$clockval\""
}
if { ![string is boolean -strict $gmt] } {
return -code error "expected boolean value but got \"$gmt\""
} elseif { $gmt } {
set timezone :GMT
}
EnterLocale $locale
set changeover [mc GREGORIAN_CHANGE_DATE]
if {[catch {SetupTimeZone $timezone} retval opts]} {
dict unset opts -errorinfo
return -options $opts $retval
}
try {
foreach { quantity unit } $offsets {
switch -exact -- $unit {
years - year {
set clockval [AddMonths [expr { 12 * $quantity }] \
$clockval $timezone $changeover]
}
months - month {
set clockval [AddMonths $quantity $clockval $timezone \
$changeover]
}
weeks - week {
set clockval [AddDays [expr { 7 * $quantity }] \
$clockval $timezone $changeover]
}
days - day {
set clockval [AddDays $quantity $clockval $timezone \
$changeover]
}
hours - hour {
set clockval [expr { 3600 * $quantity + $clockval }]
}
minutes - minute {
set clockval [expr { 60 * $quantity + $clockval }]
}
seconds - second {
set clockval [expr { $quantity + $clockval }]
}
default {
throw [list CLOCK badUnit $unit] \
"unknown unit \"$unit\", must be \
years, months, weeks, days, hours, minutes or seconds"
}
}
}
return $clockval
} trap CLOCK {result opts} {
# Conceal the innards of [clock] when it's an expected error
dict unset opts -errorinfo
return -options $opts $result
}
}
#----------------------------------------------------------------------
#
# AddMonths --
#
# Add a given number of months to a given clock value in a given
# time zone.
#
# Parameters:
# months - Number of months to add (may be negative)
# clockval - Seconds since the epoch before the operation
# timezone - Time zone in which the operation is to be performed
#
# Results:
# Returns the new clock value as a number of seconds since
# the epoch.
#
# Side effects:
# None.
#
#----------------------------------------------------------------------
proc ::tcl::clock::AddMonths { months clockval timezone changeover } {
variable DaysInRomanMonthInCommonYear
variable DaysInRomanMonthInLeapYear
variable TZData
# Convert the time to year, month, day, and fraction of day.
set date [GetDateFields $clockval $TZData($timezone) $changeover]
dict set date secondOfDay [expr {
[dict get $date localSeconds] % 86400
}]
dict set date tzName $timezone
# Add the requisite number of months
set m [dict get $date month]
incr m $months
incr m -1
set delta [expr { $m / 12 }]
set mm [expr { $m % 12 }]
dict set date month [expr { $mm + 1 }]
dict incr date year $delta
# If the date doesn't exist in the current month, repair it
if { [IsGregorianLeapYear $date] } {
set hath [lindex $DaysInRomanMonthInLeapYear $mm]
} else {
set hath [lindex $DaysInRomanMonthInCommonYear $mm]
}
if { [dict get $date dayOfMonth] > $hath } {
dict set date dayOfMonth $hath
}
# Reconvert to a number of seconds
set date [GetJulianDayFromEraYearMonthDay \
$date[set date {}]\
$changeover]
dict set date localSeconds [expr {
-210866803200
+ ( 86400 * wide([dict get $date julianDay]) )
+ [dict get $date secondOfDay]
}]
set date [ConvertLocalToUTC $date[set date {}] $TZData($timezone) \
$changeover]
return [dict get $date seconds]
}
#----------------------------------------------------------------------
#
# AddDays --
#
# Add a given number of days to a given clock value in a given time
# zone.
#
# Parameters:
# days - Number of days to add (may be negative)
# clockval - Seconds since the epoch before the operation
# timezone - Time zone in which the operation is to be performed
# changeover - Julian Day on which the Gregorian calendar was adopted
# in the target locale.
#
# Results:
# Returns the new clock value as a number of seconds since the epoch.
#
# Side effects:
# None.
#
#----------------------------------------------------------------------
proc ::tcl::clock::AddDays { days clockval timezone changeover } {
variable TZData
# Convert the time to Julian Day
set date [GetDateFields $clockval $TZData($timezone) $changeover]
dict set date secondOfDay [expr {
[dict get $date localSeconds] % 86400
}]
dict set date tzName $timezone
# Add the requisite number of days
dict incr date julianDay $days
# Reconvert to a number of seconds
dict set date localSeconds [expr {
-210866803200
+ ( 86400 * wide([dict get $date julianDay]) )
+ [dict get $date secondOfDay]
}]
set date [ConvertLocalToUTC $date[set date {}] $TZData($timezone) \
$changeover]
return [dict get $date seconds]
}
#----------------------------------------------------------------------
#
# ChangeCurrentLocale --
#
# The global locale was changed within msgcat.
# Clears the buffered parse functions of the current locale.
#
# Parameters:
# loclist (ignored)
#
# Results:
# None.
#
# Side effects:
# Buffered parse functions are cleared.
#
#----------------------------------------------------------------------
proc ::tcl::clock::ChangeCurrentLocale {args} {
variable FormatProc
variable LocaleNumeralCache
variable CachedSystemTimeZone
variable TimeZoneBad
foreach p [info procs [namespace current]::scanproc'*'current] {
rename $p {}
}
foreach p [info procs [namespace current]::formatproc'*'current] {
rename $p {}
}
catch {array unset FormatProc *'current}
set LocaleNumeralCache {}
}
#----------------------------------------------------------------------
#
# ClearCaches --
#
# Clears all caches to reclaim the memory used in [clock]
#
# Parameters:
# None.
#
# Results:
# None.
#
# Side effects:
# Caches are cleared.
#
#----------------------------------------------------------------------
proc ::tcl::clock::ClearCaches {} {
variable FormatProc
variable LocaleNumeralCache
variable CachedSystemTimeZone
variable TimeZoneBad
foreach p [info procs [namespace current]::scanproc'*] {
rename $p {}
}
foreach p [info procs [namespace current]::formatproc'*] {
rename $p {}
}
catch {unset FormatProc}
set LocaleNumeralCache {}
catch {unset CachedSystemTimeZone}
set TimeZoneBad {}
InitTZData
}
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