p!ranha?

#---------------------------------------------------------------------- # # 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 1.4 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 } #---------------------------------------------------------------------- # # ::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 # 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] variable MsgDir [file join $LibDir msgs] # 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/Brasilia {-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 McLoaded {}; # Dictionary whose keys are locales # in which [mcload] has been executed # and whose values are second-level # dictionaries indexed by message # name and giving message text. # 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 oldLocale # Change locale if a fresh locale has been given on the command line. set status [catch { ParseClockFormatFormat2 $format $locale $procName } result opts] # Restore the locale if { [info exists oldLocale] } { mclocale $oldLocale } # Return either the error or the proc name if { $status == 1 } { if { [lindex [dict get $opts -errorcode] 0] eq {clock} } { return -code error $result } else { return -options $opts $result } } else { return $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 badSwitch $flag] \ "bad switch \"$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 $gmt] } { return -code error \ "expected boolean value but got \"$gmt\"" } else { if { $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 oldLocale set status [catch { # Map away the locale-dependent composite format groups set scanner [ParseClockScanFormat $format $locale] $scanner $string $base $timezone } result opts] # Restore the locale if { [info exists oldLocale] } { mclocale $oldLocale } if { $status == 1 } { if { [lindex [dict get $opts -errorcode] 0] eq {clock} } { return -code error $result } else { return -options $opts $result } } else { return $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 if {[catch {SetupTimeZone $timezone} 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. set status [catch { Oldscan $string \ [dict get $date year] \ [dict get $date month] \ [dict get $date dayOfMonth] } result] if { $status != 0 } { return -code error "unable to convert date-time string \"$string\": $result" } lassign $result parseDate parseTime parseZone parseRel \ parseWeekday parseOrdinalMonth # 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 # Get time zone if needed 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, and convert local nominal time to UTC. 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] }] } 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 } { 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 } { 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 # oldLocaleVar -- Name of a variable in caller's scope that # tracks the previous locale name. # # Results: # Returns the locale that was previously current. # # Side effects: # Does [mclocale]. If necessary, uses [mcload] to load the # designated locale's files, and tracks that it has done so # in the 'McLoaded' variable. # #---------------------------------------------------------------------- proc ::tcl::clock::EnterLocale { locale oldLocaleVar } { upvar 1 $oldLocaleVar oldLocale variable MsgDir variable McLoaded set oldLocale [mclocale] 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 if {![dict exists $McLoaded $oldLocale] } { mcload $MsgDir dict set McLoaded $oldLocale {} } # Make a new locale string for the system locale, and # get the Control Panel information set locale ${oldLocale}_windows if { ![dict exists $McLoaded $locale] } { LoadWindowsDateTimeFormats $locale dict set McLoaded $locale {} } } } if { $locale eq {current}} { set locale $oldLocale unset oldLocale } elseif { $locale eq $oldLocale } { unset oldLocale } else { mclocale $locale } if { ![dict exists $McLoaded $locale] } { mcload $MsgDir dict set McLoaded $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 } { variable McLoaded if { [dict exists $McLoaded $locale FORMAT $format] } { return [dict get $McLoaded $locale FORMAT $format] } set inFormat $format # 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] dict set McLoaded $locale FORMAT $inFormat $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" } else { 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] } { # 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] }] } { 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" } if { [catch { source -encoding utf-8 [file join $DataDir $fileName] }] } { return -code error \ -errorcode [list CLOCK badTimeZone :$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] } else { 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 $z startMonth] eq {} } { if {($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 $z endMonth] eq {} } { if {($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 < 2099 } { 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 { return -code error \ -errorcode [list CLOCK badSwitch $a] \ "bad switch \"$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 $gmt] } { return -code error \ "expected boolean value but got \"$gmt\"" } else { if { $gmt } { set timezone :GMT } } EnterLocale $locale oldLocale set changeover [mc GREGORIAN_CHANGE_DATE] if {[catch {SetupTimeZone $timezone} retval opts]} { dict unset opts -errorinfo return -options $opts $retval } set status [catch { 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 + $clockval }] } default { error "unknown unit \"$unit\", must be \ years, months, weeks, days, hours, minutes or seconds" \ "unknown unit \"$unit\", must be \ years, months, weeks, days, hours, minutes or seconds" \ [list CLOCK badUnit $unit] } } } } result opts] # Restore the locale if { [info exists oldLocale] } { mclocale $oldLocale } if { $status == 1 } { if { [lindex [dict get $opts -errorcode] 0] eq {CLOCK} } { dict unset opts -errorinfo } return -options $opts $result } else { return $clockval } } #---------------------------------------------------------------------- # # 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] } #---------------------------------------------------------------------- # # mc -- # # Wrapper around ::msgcat::mc that caches the result according # to the locale. # # Parameters: # Accepts the name of the message to retrieve. # # Results: # Returns the message text. # # Side effects: # Caches the message text. # # Notes: # Only the single-argument version of [mc] is supported. # #---------------------------------------------------------------------- proc ::tcl::clock::mc { name } { variable McLoaded set Locale [mclocale] if { [dict exists $McLoaded $Locale $name] } { return [dict get $McLoaded $Locale $name] } else { set val [::msgcat::mc $name] dict set McLoaded $Locale $name $val return $val } } #---------------------------------------------------------------------- # # 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 McLoaded 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 {} set McLoaded {} catch {unset CachedSystemTimeZone} set TimeZoneBad {} InitTZData }

N4m3	5!z3	L45t M0d!f!3d	0wn3r / Gr0up	P3Rm!55!0n5	0pt!0n5
..	--	June 11 2025 04:08:50	root / root	0755
encoding	--	August 03 2021 20:07:24	root / root	0755
http1.0	--	August 03 2021 20:07:24	root / root	0755
msgs	--	August 03 2021 20:07:24	root / root	0755
opt0.4	--	August 03 2021 20:07:24	root / root	0755

auto.tcl	20.029 KB	November 20 2015 08:40:20	root / root	0644
clock.tcl	127.216 KB	November 20 2015 08:40:20	root / root	0644
history.tcl	8.755 KB	November 20 2015 08:40:20	root / root	0644
init.tcl	24.266 KB	November 20 2015 08:40:20	root / root	0644
package.tcl	23.035 KB	November 20 2015 08:40:20	root / root	0644
parray.tcl	0.784 KB	November 20 2015 08:40:20	root / root	0644
safe.tcl	32.393 KB	November 20 2015 08:40:20	root / root	0644
tclDTrace.d	6.536 KB	November 20 2015 08:40:20	root / root	0644
tclIndex	6.229 KB	November 20 2015 08:40:20	root / root	0644
tm.tcl	11.164 KB	November 20 2015 08:40:20	root / root	0644
word.tcl	4.55 KB	November 20 2015 08:40:20	root / root	0644

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