diff options
Diffstat (limited to 'library/clock.tcl')
| -rw-r--r-- | library/clock.tcl | 39 |
1 files changed, 23 insertions, 16 deletions
diff --git a/library/clock.tcl b/library/clock.tcl index b6ff359..1e652b4 100644 --- a/library/clock.tcl +++ b/library/clock.tcl @@ -324,7 +324,7 @@ proc ::tcl::clock::Initialize {} { {-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 2 0 5 2 0 0 0 0 11 0 1 2 0 0 0} :America/Bahia {-10800 0 3600 0 3 0 2 2 0 0 0 0 10 0 1 2 0 0 0} :America/Montevideo {-7200 0 3600 0 9 0 5 2 0 0 0 0 3 0 5 2 0 0 0} :America/Noronha {-3600 0 3600 0 10 0 5 3 0 0 0 0 3 0 5 2 0 0 0} :Atlantic/Azores @@ -3012,18 +3012,23 @@ proc ::tcl::clock::GetSystemTimeZone {} { set timezone $result } elseif {[set result [getenv TZ]] ne {}} { set timezone $result - } elseif { [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 {![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}] } @@ -3406,7 +3411,7 @@ proc ::tcl::clock::LoadZoneinfoFile { fileName } { proc ::tcl::clock::ReadZoneinfoFile {fileName fname} { variable MINWIDE variable TZData - if { ![info exists fname] } { + if { ![file exists $fname] } { return -code error "$fileName not found" } @@ -3497,8 +3502,10 @@ proc ::tcl::clock::ReadZoneinfoFile {fileName fname} { set i 0 set abbrevs {} foreach a $abbrList { - dict set abbrevs $i $a - incr i [expr { [string length $a] + 1 }] + for {set j 0} {$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, @@ -3854,7 +3861,7 @@ proc ::tcl::clock::ProcessPosixTimeZone { z } { # Put DST in effect in all years from 1916 to 2099. - for { set y 1916 } { $y < 2099 } { incr y } { + for { set y 1916 } { $y < 2100 } { incr y } { set startTime [DeterminePosixDSTTime $z start $y] incr startTime [expr { - wide($stdOffset) }] set endTime [DeterminePosixDSTTime $z end $y] |