summaryrefslogtreecommitdiffstats
path: root/library/clock.tcl
diff options
context:
space:
mode:
Diffstat (limited to 'library/clock.tcl')
-rw-r--r--library/clock.tcl1116
1 files changed, 497 insertions, 619 deletions
diff --git a/library/clock.tcl b/library/clock.tcl
index 32911b3..0696c47 100644
--- a/library/clock.tcl
+++ b/library/clock.tcl
@@ -2,9 +2,9 @@
#
# 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.
+# 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.
#
#
#----------------------------------------------------------------------
@@ -15,8 +15,8 @@
#
#----------------------------------------------------------------------
-# We must have message catalogs that support the root locale, and
-# we need access to the Registry on Windows systems.
+# 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
@@ -27,9 +27,8 @@ uplevel \#0 {
}
}
-# Put the library directory into the namespace for the ensemble
-# so that the library code can find message catalogs and time zone
-# definition files.
+# 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]]]
@@ -40,10 +39,10 @@ namespace eval ::tcl::clock \
#
# Manipulate times.
#
-# The 'clock' command manipulates time. Refer to the user documentation
-# for the available subcommands and what they do.
+# The 'clock' command manipulates time. Refer to the user documentation for
+# the available subcommands and what they do.
#
-#----------------------------------------------------------------------
+#----------------------------------------------------------------------
namespace eval ::tcl::clock {
@@ -76,11 +75,11 @@ namespace eval ::tcl::clock {
# 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.
+# 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.
#
#----------------------------------------------------------------------
@@ -172,8 +171,8 @@ proc ::tcl::clock::Initialize {} {
::msgcat::mcset fr GREGORIAN_CHANGE_DATE 2299227
- # For Belgium, we follow Southern Netherlands; Liege Diocese
- # changed several weeks later.
+ # 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
@@ -189,13 +188,13 @@ proc ::tcl::clock::Initialize {} {
# Germany, Norway, Denmark (Catholic Germany changed earlier)
::msgcat::mcset de_DE GREGORIAN_CHANGE_DATE 2342032
- ::msgcat::mcset nb 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)
+ # Holland (Brabant, Gelderland, Flanders, Friesland, etc. changed at
+ # various times)
::msgcat::mcset nl GREGORIAN_CHANGE_DATE 2342165
@@ -217,23 +216,23 @@ proc ::tcl::clock::Initialize {} {
::msgcat::mcset ru GREGORIAN_CHANGE_DATE 2421639
- # Romania (Transylvania changed earler - perhaps de_RO should show
- # the earlier date?)
+ # 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
+ # Paths at which binary time zone data for the Olson libraries are known
+ # to reside on various operating systems
variable ZoneinfoPaths {}
foreach path {
@@ -282,10 +281,10 @@ proc ::tcl::clock::Initialize {} {
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.
+ # 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:
@@ -296,10 +295,10 @@ proc ::tcl::clock::Initialize {} {
# 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.
+ # 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
@@ -378,10 +377,10 @@ proc ::tcl::clock::Initialize {} {
{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.
+ # 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 {
@@ -485,8 +484,8 @@ proc ::tcl::clock::Initialize {} {
}
}
- # Groups of fields that specify time of day, priorities,
- # and code that processes them
+ # Groups of fields that specify time of day, priorities, and code that
+ # processes them
variable TimeParseActions {
@@ -652,16 +651,14 @@ proc ::tcl::clock::Initialize {} {
#
# clock format --
#
-# Formats a count of seconds since the Posix Epoch as a time
-# of day.
+# 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.
+# 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
@@ -670,7 +667,7 @@ proc ::tcl::clock::format { args } {
set clockval [lindex $args 0]
# Get the data for time changes in the given zone
-
+
if {$timezone eq ""} {
set timezone [GetSystemTimeZone]
}
@@ -680,11 +677,11 @@ proc ::tcl::clock::format { args } {
return -options $opts $retval
}
}
-
- # Build a procedure to format the result. Cache the built procedure's
- # name in the 'FormatProc' array to avoid losing its internal
- # representation, which contains the name resolution.
-
+
+ # Build a procedure to format the result. Cache the built procedure's name
+ # in the 'FormatProc' array to avoid losing its internal representation,
+ # which contains the name resolution.
+
set procName formatproc'$format'$locale
set procName [namespace current]::[string map {: {\:} \\ {\\}} $procName]
if {[info exists FormatProc($procName)]} {
@@ -693,9 +690,8 @@ proc ::tcl::clock::format { args } {
set FormatProc($procName) \
[ParseClockFormatFormat $procName $format $locale]
}
-
- return [$procName $clockval $timezone]
+ return [$procName $clockval $timezone]
}
#----------------------------------------------------------------------
@@ -714,45 +710,31 @@ proc ::tcl::clock::format { args } {
#----------------------------------------------------------------------
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
+ try {
+ return [ParseClockFormatFormat2 $format $locale $procName]
+ } trap CLOCK {result opts} {
+ dict unset opts -errorinfo
+ return -options $opts $result
+ } finally {
+ # Restore the locale
- if { $status == 1 } {
- if { [lindex [dict get $opts -errorcode] 0] eq {clock} } {
- return -code error $result
- } else {
- return -options $opts $result
+ if { [info exists oldLocale] } {
+ mclocale $oldLocale
}
- } else {
- return $result
}
-
}
proc ::tcl::clock::ParseClockFormatFormat2 {format locale procName} {
-
set didLocaleEra 0
set didLocaleNumerals 0
set preFormatCode \
@@ -767,7 +749,7 @@ proc ::tcl::clock::ParseClockFormatFormat2 {format locale procName} {
set formatString {}
set substituents {}
set state {}
-
+
set format [LocalizeFormat $locale $format]
foreach char [split $format {}] {
@@ -794,7 +776,7 @@ proc ::tcl::clock::ParseClockFormatFormat2 {format locale procName} {
{ [lindex @DAYS_OF_WEEK_ABBREV@ \
[expr {[dict get $date dayOfWeek] \
% 7}]]}]
- }
+ }
A { # Day of week, spelt out.
append formatString %s
append substituents \
@@ -895,7 +877,7 @@ proc ::tcl::clock::ParseClockFormatFormat2 {format locale procName} {
k { # Hour (0-23), no leading zero
append formatString %2d
append substituents \
- { [expr { [dict get $date localSeconds]
+ { [expr { [dict get $date localSeconds]
/ 3600
% 24 }]}
}
@@ -916,7 +898,7 @@ proc ::tcl::clock::ParseClockFormatFormat2 {format locale procName} {
M { # Minute of the hour, leading zero
append formatString %02d
append substituents \
- { [expr { [dict get $date localSeconds]
+ { [expr { [dict get $date localSeconds]
/ 60
% 60 }]}
}
@@ -957,7 +939,7 @@ proc ::tcl::clock::ParseClockFormatFormat2 {format locale procName} {
{ [expr {(([dict get $date localSeconds]
% 86400) < 43200) ?
$am : $pm}]}
-
+
}
Q { # Hi, Jeff!
append formatString %s
@@ -967,11 +949,11 @@ proc ::tcl::clock::ParseClockFormatFormat2 {format locale procName} {
append formatString %s
append substituents { [dict get $date seconds]}
}
- S { # Second of the minute, with
+ S { # Second of the minute, with
# leading zero
append formatString %02d
append substituents \
- { [expr { [dict get $date localSeconds]
+ { [expr { [dict get $date localSeconds]
% 60 }]}
}
t { # A literal tab character
@@ -992,7 +974,7 @@ proc ::tcl::clock::ParseClockFormatFormat2 {format locale procName} {
}
incr dow
set UweekNumber \
- [expr { ( [dict get $date dayOfYear]
+ [expr { ( [dict get $date dayOfYear]
- $dow + 7 )
/ 7 }]
}
@@ -1015,7 +997,7 @@ proc ::tcl::clock::ParseClockFormatFormat2 {format locale procName} {
set WweekNumber \
[expr { ( [dict get $date dayOfYear]
- [dict get $date dayOfWeek]
- + 7 )
+ + 7 )
/ 7 }]
}
append formatString %02d
@@ -1084,7 +1066,7 @@ proc ::tcl::clock::ParseClockFormatFormat2 {format locale procName} {
percentO { # Character following %O
set state {}
switch -exact -- $char {
- d - e { # Day of the month in alternative
+ d - e { # Day of the month in alternative
# numerals
append formatString %s
append substituents \
@@ -1096,7 +1078,7 @@ proc ::tcl::clock::ParseClockFormatFormat2 {format locale procName} {
append formatString %s
append substituents \
{ [lindex $localeNumerals \
- [expr { [dict get $date localSeconds]
+ [expr { [dict get $date localSeconds]
/ 3600
% 24 }]]}
}
@@ -1122,7 +1104,7 @@ proc ::tcl::clock::ParseClockFormatFormat2 {format locale procName} {
append formatString %s
append substituents \
{ [lindex $localeNumerals \
- [expr { [dict get $date localSeconds]
+ [expr { [dict get $date localSeconds]
/ 60
% 60 }]]}
}
@@ -1131,7 +1113,7 @@ proc ::tcl::clock::ParseClockFormatFormat2 {format locale procName} {
append formatString %s
append substituents \
{ [lindex $localeNumerals \
- [expr { [dict get $date localSeconds]
+ [expr { [dict get $date localSeconds]
% 60 }]]}
}
u { # Day of the week (Monday=1,Sunday=7)
@@ -1162,9 +1144,9 @@ proc ::tcl::clock::ParseClockFormatFormat2 {format locale procName} {
}
}
}
-
+
# Clean up any improperly terminated groups
-
+
switch -exact -- $state {
percent {
append formatString %%
@@ -1191,16 +1173,14 @@ proc ::tcl::clock::ParseClockFormatFormat2 {format locale procName} {
#
# clock scan --
#
-# Inputs a count of seconds since the Posix Epoch as a time
-# of day.
+# Inputs a count of seconds since the Posix Epoch as a time of day.
#
-# The 'clock format' command scans times of day on input.
-# Refer to the user documentation to see what it does.
+# The 'clock format' command scans times of day on input. Refer to the user
+# documentation to see what it does.
#
#----------------------------------------------------------------------
proc ::tcl::clock::scan { args } {
-
set format {}
# Check the count of args
@@ -1262,21 +1242,17 @@ proc ::tcl::clock::scan { args } {
"cannot use -gmt and -timezone in same call"
}
if { [catch { expr { wide($base) } } result] } {
- return -code error \
- "expected integer but got \"$base\""
+ return -code error "expected integer but got \"$base\""
}
- if { ![string is boolean $gmt] } {
- return -code error \
- "expected boolean value but got \"$gmt\""
- } else {
- if { $gmt } {
- set timezone :GMT
- }
+ if { ![string is boolean -strict $gmt] } {
+ return -code error "expected boolean value but got \"$gmt\""
+ } elseif { $gmt } {
+ set timezone :GMT
}
if { ![info exists saw(-format)] } {
- # Perhaps someday we'll localize the legacy code. Right now,
- # it's not localized.
+ # 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] \
@@ -1290,31 +1266,23 @@ proc ::tcl::clock::scan { args } {
EnterLocale $locale oldLocale
- set status [catch {
-
+ try {
# Map away the locale-dependent composite format groups
set scanner [ParseClockScanFormat $format $locale]
- $scanner $string $base $timezone
-
- } result opts]
-
- # Restore the locale
+ return [$scanner $string $base $timezone]
+ } trap CLOCK {result opts} {
+ # Conceal location of generation of expected errors
- if { [info exists oldLocale] } {
- mclocale $oldLocale
- }
+ dict unset opts -errorinfo
+ return -options $opts $result
+ } finally {
+ # Restore the locale
- if { $status == 1 } {
- if { [lindex [dict get $opts -errorcode] 0] eq {clock} } {
- return -code error $result
- } else {
- return -options $opts $result
+ if { [info exists oldLocale] } {
+ mclocale $oldLocale
}
- } else {
- return $result
}
-
}
#----------------------------------------------------------------------
@@ -1330,52 +1298,50 @@ proc ::tcl::clock::scan { args } {
# 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
+# 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]} {
+
+ try {
+ SetupTimeZone $timezone
+ } on error {retval opts} {
dict unset opts -errorinfo
return -options $opts $retval
}
- # Extract year, month and day from the base time for the
- # parser to use as defaults
-
- set date [GetDateFields \
- $base \
- $TZData($timezone) \
- 2361222]
- dict set date secondOfDay [expr { [dict get $date localSeconds]
- % 86400 }]
+ # Extract year, month and day from the base time for the parser to use as
+ # defaults
- # Parse the date. The parser will return a list comprising
- # date, time, time zone, relative month/day/seconds, relative
- # weekday, ordinal month.
+ set date [GetDateFields $base $TZData($timezone) 2361222]
+ dict set date secondOfDay [expr {
+ [dict get $date localSeconds] % 86400
+ }]
- 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"
+ # Parse the date. The parser will return a list comprising date, time,
+ # time zone, relative month/day/seconds, relative weekday, ordinal month.
+
+ try {
+ set scanned [Oldscan $string \
+ [dict get $date year] \
+ [dict get $date month] \
+ [dict get $date dayOfMonth]]
+ lassign $scanned \
+ parseDate parseTime parseZone parseRel \
+ parseWeekday parseOrdinalMonth
+ } on error message {
+ return -code error \
+ "unable to convert date-time string \"$string\": $message"
}
- 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 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
@@ -1395,12 +1361,12 @@ proc ::tcl::clock::FreeScan { string base timezone locale } {
}
}
- # 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 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 \
@@ -1414,18 +1380,19 @@ proc ::tcl::clock::FreeScan { string base timezone locale } {
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
+ } 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 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]
@@ -1437,18 +1404,17 @@ proc ::tcl::clock::FreeScan { string base timezone locale } {
set seconds [add $seconds \
$relMonth months $relDay days $relSecond seconds \
-timezone $timezone -locale $locale]
- }
+ }
# Do relative weekday
-
- if { [llength $parseWeekday] > 0 } {
+ 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 }]]
+ set jdwkday [WeekdayOnOrBefore $dayOfWeek [expr {
+ [dict get $date2 julianDay] + 6
+ }]]
incr jdwkday [expr { 7 * $dayOrdinal }]
if { $dayOrdinal > 0 } {
incr jdwkday -7
@@ -1456,21 +1422,20 @@ proc ::tcl::clock::FreeScan { string base timezone locale } {
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 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] }]
@@ -1487,7 +1452,6 @@ proc ::tcl::clock::FreeScan { string base timezone locale } {
}
set seconds [add $seconds $monthOrdinal years $monthDiff months \
-timezone $timezone -locale $locale]
-
}
return $seconds
@@ -1505,30 +1469,27 @@ proc ::tcl::clock::FreeScan { string base timezone locale } {
# 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]
+# 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
+# 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.
+ # 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]
@@ -1572,8 +1533,8 @@ proc ::tcl::clock::ParseClockScanFormat {formatString locale} {
append re {[[:space:]]+}
} else {
if { ! [string is alnum $c] } {
- append re \\
- }
+ append re "\\"
+ }
append re $c
}
}
@@ -1690,7 +1651,7 @@ proc ::tcl::clock::ParseClockScanFormat {formatString locale} {
"::scan \$field" [incr captureCount] " %ld" \
"\]\n"
}
- m - N { # Month number
+ m - N { # Month number
append re \\s*(\\d\\d?)
dict set fieldSet month [incr fieldCount]
append postcode "dict set date month \[" \
@@ -1733,10 +1694,9 @@ proc ::tcl::clock::ParseClockScanFormat {formatString locale} {
\] \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.
+ # 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 } \[ \
@@ -1769,14 +1729,13 @@ proc ::tcl::clock::ParseClockScanFormat {formatString locale} {
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.
+ 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 \[" \
@@ -1948,7 +1907,7 @@ proc ::tcl::clock::ParseClockScanFormat {formatString locale} {
"day of week is greater than 7"
}
dict set date dayOfWeek $dow
- }
+ }
}
y {
lassign [LocaleNumeralMatcher $locale] regex lookup
@@ -1994,10 +1953,11 @@ proc ::tcl::clock::ParseClockScanFormat {formatString locale} {
append procBody $postcode
append procBody [list set changeover [mc GREGORIAN_CHANGE_DATE]] \n
- # Get time zone if needed
+ # Set up the time zone before doing anything with a default base date
+ # that might need a timezone to interpret it.
- if { ![dict exists $fieldSet seconds]
- && ![dict exists $fieldSet starDate] } {
+ if { ![dict exists $fieldSet seconds]
+ && ![dict exists $fieldSet starDate] } {
if { [dict exists $fieldSet tzName] } {
append procBody {
set timeZone [dict get $date tzName]
@@ -2016,24 +1976,29 @@ proc ::tcl::clock::ParseClockScanFormat {formatString locale} {
append procBody [MakeParseCodeFromFields $fieldSet $TimeParseActions]
- # Assemble seconds, and convert local nominal time to UTC.
+ # Assemble seconds from the Julian day and second of the day.
+ # Convert to local time unless epoch seconds or stardate are
+ # being processed - they're always absolute
- if { ![dict exists $fieldSet seconds]
+ 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] }]
+ dict set date localSeconds [expr {
+ -210866803200
+ + ( 86400 * wide([dict get $date julianDay]) )
+ + [dict get $date secondOfDay]
+ }]
}
+
+ # Finally, convert the date to local time
+
append procBody {
set date [::tcl::clock::ConvertLocalToUTC $date[set date {}] \
- $TZData($timeZone) \
- $changeover]
+ $TZData($timeZone) $changeover]
}
}
@@ -2047,20 +2012,19 @@ proc ::tcl::clock::ParseClockScanFormat {formatString locale} {
return $procName
}
-
+
#----------------------------------------------------------------------
#
# LocaleNumeralMatcher --
#
-# Composes a regexp that captures the numerals in the given
-# locale, and a dictionary to map them to conventional numerals.
+# 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.
+# Returns a two-element list comprising the regexp and the dictionary.
#
# Side effects:
# Caches the result.
@@ -2068,7 +2032,6 @@ proc ::tcl::clock::ParseClockScanFormat {formatString locale} {
#----------------------------------------------------------------------
proc ::tcl::clock::LocaleNumeralMatcher {l} {
-
variable LocaleNumeralCache
if { ![dict exists $LocaleNumeralCache $l] } {
@@ -2087,16 +2050,16 @@ proc ::tcl::clock::LocaleNumeralMatcher {l} {
}
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.
+# 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.
@@ -2104,10 +2067,10 @@ proc ::tcl::clock::LocaleNumeralMatcher {l} {
# 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'.
+# 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.
@@ -2115,11 +2078,10 @@ proc ::tcl::clock::LocaleNumeralMatcher {l} {
#----------------------------------------------------------------------
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.
+ # 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 {} {}]
@@ -2127,8 +2089,7 @@ proc ::tcl::clock::UniquePrefixRegexp { data } {
# Walk the key-value pairs
foreach { key value } $data {
-
- # Construct all prefixes of the key;
+ # Construct all prefixes of the key;
set prefix {}
foreach char [split $key {}] {
@@ -2146,8 +2107,8 @@ proc ::tcl::clock::UniquePrefixRegexp { data } {
}
}
- # Identify those prefixes that designate unique values, and
- # those that are the full keys
+ # Identify those prefixes that designate unique values, and those that are
+ # the full keys
set uniquePrefixMapping {}
dict for { key valueList } $prefixMapping {
@@ -2170,8 +2131,8 @@ proc ::tcl::clock::UniquePrefixRegexp { data } {
#
# MakeUniquePrefixRegexp --
#
-# Service procedure for 'UniquePrefixRegexp' that constructs
-# a regular expresison that matches the unique prefixes.
+# Service procedure for 'UniquePrefixRegexp' that constructs a regular
+# expresison that matches the unique prefixes.
#
# Parameters:
# successors - Dictionary whose keys are all prefixes
@@ -2183,18 +2144,17 @@ proc ::tcl::clock::UniquePrefixRegexp { data } {
# prefixString - Current prefix being processed.
#
# Results:
-# Returns a constructed regular expression that matches the set
-# of unique prefixes beginning with the 'prefixString'.
+# Returns a constructed regular expression that matches the set of
+# unique prefixes beginning with the 'prefixString'.
#
# Side effects:
# None.
#
#----------------------------------------------------------------------
-proc ::tcl::clock::MakeUniquePrefixRegexp { successors
+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]]]
@@ -2202,13 +2162,15 @@ proc ::tcl::clock::MakeUniquePrefixRegexp { successors
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
+ # 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 } {
+ if {
+ [dict exists $uniquePrefixMapping $prefixString]
+ || [llength $schars] > 1
+ } then {
append re "(?:"
}
@@ -2230,7 +2192,7 @@ proc ::tcl::clock::MakeUniquePrefixRegexp { successors
if { [dict exists $uniquePrefixMapping $prefixString] } {
append re ")?"
- } elseif { [llength $schars] > 1 } {
+ } elseif { [llength $schars] > 1 } {
append re ")"
}
@@ -2241,8 +2203,8 @@ proc ::tcl::clock::MakeUniquePrefixRegexp { successors
#
# MakeParseCodeFromFields --
#
-# Composes Tcl code to extract the Julian Day Number from a
-# dictionary containing date fields.
+# 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,
@@ -2253,8 +2215,8 @@ proc ::tcl::clock::MakeUniquePrefixRegexp { successors
# the list must be in ascending order by priority
#
# Results:
-# Returns a burst of code that extracts the day number from the
-# given date.
+# Returns a burst of code that extracts the day number from the given
+# date.
#
# Side effects:
# None.
@@ -2262,7 +2224,6 @@ proc ::tcl::clock::MakeUniquePrefixRegexp { successors
#----------------------------------------------------------------------
proc ::tcl::clock::MakeParseCodeFromFields { dateFields parseActions } {
-
set currPrio 999
set currFieldPos [list]
set currCodeBurst {
@@ -2270,16 +2231,15 @@ proc ::tcl::clock::MakeParseCodeFromFields { dateFields parseActions } {
}
foreach { fieldSet prio parseAction } $parseActions {
-
- # If we've found an answer that's better than any that follow,
- # quit now.
+ # 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.
+ # Accumulate the field positions that are used in the current field
+ # grouping.
set fieldPos [list]
set ok true
@@ -2302,9 +2262,11 @@ proc ::tcl::clock::MakeParseCodeFromFields { dateFields parseActions } {
if { $prio == $currPrio } {
foreach currPos $currFieldPos newPos $fPos {
- if { ![string is integer $newPos]
- || ![string is integer $currPos]
- || $newPos > $currPos } {
+ if {
+ ![string is integer $newPos]
+ || ![string is integer $currPos]
+ || $newPos > $currPos
+ } then {
break
}
if { $newPos < $currPos } {
@@ -2322,11 +2284,9 @@ proc ::tcl::clock::MakeParseCodeFromFields { dateFields parseActions } {
set currPrio $prio
set currFieldPos $fPos
set currCodeBurst $parseAction
-
}
return $currCodeBurst
-
}
#----------------------------------------------------------------------
@@ -2344,14 +2304,13 @@ proc ::tcl::clock::MakeParseCodeFromFields { dateFields parseActions } {
# 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.
+# 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
@@ -2359,27 +2318,24 @@ proc ::tcl::clock::EnterLocale { locale oldLocaleVar } {
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
+ # 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
+ # 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
+ # Make a new locale string for the system locale, and get the
+ # Control Panel information
set locale ${oldLocale}_windows
if { ![dict exists $McLoaded $locale] } {
@@ -2400,15 +2356,14 @@ proc ::tcl::clock::EnterLocale { locale oldLocaleVar } {
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.
+# 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
@@ -2420,14 +2375,12 @@ proc ::tcl::clock::EnterLocale { locale oldLocaleVar } {
# 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.
+# 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
@@ -2529,7 +2482,6 @@ proc ::tcl::clock::LoadWindowsDateTimeFormats { locale } {
}
return
-
}
#----------------------------------------------------------------------
@@ -2544,8 +2496,8 @@ proc ::tcl::clock::LoadWindowsDateTimeFormats { locale } {
# format -- Format supplied to [clock scan] or [clock format]
#
# Results:
-# Returns the string with locale-dependent composite format
-# groups substituted out.
+# Returns the string with locale-dependent composite format groups
+# substituted out.
#
# Side effects:
# None.
@@ -2553,7 +2505,6 @@ proc ::tcl::clock::LoadWindowsDateTimeFormats { locale } {
#----------------------------------------------------------------------
proc ::tcl::clock::LocalizeFormat { locale format } {
-
variable McLoaded
if { [dict exists $McLoaded $locale FORMAT $format] } {
@@ -2565,7 +2516,7 @@ proc ::tcl::clock::LocalizeFormat { locale 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
@@ -2582,7 +2533,7 @@ proc ::tcl::clock::LocalizeFormat { locale 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
}
@@ -2605,7 +2556,6 @@ proc ::tcl::clock::LocalizeFormat { locale format } {
#----------------------------------------------------------------------
proc ::tcl::clock::FormatNumericTimeZone { z } {
-
if { $z < 0 } {
set z [expr { - $z }]
set retval -
@@ -2620,7 +2570,6 @@ proc ::tcl::clock::FormatNumericTimeZone { z } {
append retval [::format %02d $z]
}
return $retval
-
}
#----------------------------------------------------------------------
@@ -2645,7 +2594,6 @@ proc ::tcl::clock::FormatNumericTimeZone { z } {
#----------------------------------------------------------------------
proc ::tcl::clock::FormatStarDate { date } {
-
variable Roddenberry
# Get day of year, zero based
@@ -2696,7 +2644,6 @@ proc ::tcl::clock::FormatStarDate { date } {
#----------------------------------------------------------------------
proc ::tcl::clock::ParseStarDate { year fractYear fractDay } {
-
variable Roddenberry
# Build a tentative date from year and fraction.
@@ -2712,8 +2659,8 @@ proc ::tcl::clock::ParseStarDate { year fractYear fractDay } {
set lp [IsGregorianLeapYear $date]
- # Reconvert the fractional year according to whether the given
- # year is a leap year
+ # Reconvert the fractional year according to whether the given year is a
+ # leap year
if { $lp } {
dict set date dayOfYear \
@@ -2726,10 +2673,11 @@ proc ::tcl::clock::ParseStarDate { year fractYear fractDay } {
dict unset date gregorian
set date [GetJulianDayFromGregorianEraYearDay $date[set date {}]]
- return [expr { 86400 * [dict get $date julianDay]
- - 210866803200
- + ( 86400 / 10 ) * $fractDay }]
-
+ return [expr {
+ 86400 * [dict get $date julianDay]
+ - 210866803200
+ + ( 86400 / 10 ) * $fractDay
+ }]
}
#----------------------------------------------------------------------
@@ -2742,8 +2690,8 @@ proc ::tcl::clock::ParseStarDate { year fractYear fractDay } {
# 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.
+# Returns the string as a pure wide integer. Throws an error if the
+# string is misformatted or out of range.
#
#----------------------------------------------------------------------
@@ -2764,8 +2712,8 @@ proc ::tcl::clock::ScanWide { str } {
#
# InterpretTwoDigitYear --
#
-# Given a date that contains only the year of the century,
-# determines the target value of a two-digit year.
+# 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.
@@ -2782,18 +2730,17 @@ proc ::tcl::clock::ScanWide { str } {
# 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.
+# 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
+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 }]
@@ -2801,7 +2748,6 @@ proc ::tcl::clock::InterpretTwoDigitYear { date baseTime
dict set date $fourDigitField [expr { $yr + 1900 }]
}
return $date
-
}
#----------------------------------------------------------------------
@@ -2827,7 +2773,6 @@ proc ::tcl::clock::InterpretTwoDigitYear { date baseTime
#----------------------------------------------------------------------
proc ::tcl::clock::AssignBaseYear { date baseTime timezone changeover } {
-
variable TZData
# Find the Julian Day Number corresponding to the base time, and
@@ -2841,7 +2786,6 @@ proc ::tcl::clock::AssignBaseYear { date baseTime timezone changeover } {
dict set date year [dict get $date2 year]
return $date
-
}
#----------------------------------------------------------------------
@@ -2868,7 +2812,6 @@ proc ::tcl::clock::AssignBaseYear { date baseTime timezone changeover } {
#----------------------------------------------------------------------
proc ::tcl::clock::AssignBaseIso8601Year {date baseTime timeZone changeover} {
-
variable TZData
# Find the Julian Day Number corresponding to the base time
@@ -2886,7 +2829,7 @@ proc ::tcl::clock::AssignBaseIso8601Year {date baseTime timeZone changeover} {
#
# AssignBaseMonth --
#
-# Places the number of the current year and month into a
+# Places the number of the current year and month into a
# dictionary.
#
# Parameters:
@@ -2905,7 +2848,6 @@ proc ::tcl::clock::AssignBaseIso8601Year {date baseTime timeZone changeover} {
#----------------------------------------------------------------------
proc ::tcl::clock::AssignBaseMonth {date baseTime timezone changeover} {
-
variable TZData
# Find the year and month corresponding to the base time
@@ -2915,7 +2857,6 @@ proc ::tcl::clock::AssignBaseMonth {date baseTime timezone changeover} {
dict set date year [dict get $date2 year]
dict set date month [dict get $date2 month]
return $date
-
}
#----------------------------------------------------------------------
@@ -2941,7 +2882,6 @@ proc ::tcl::clock::AssignBaseMonth {date baseTime timezone changeover} {
#----------------------------------------------------------------------
proc ::tcl::clock::AssignBaseWeek {date baseTime timeZone changeover} {
-
variable TZData
# Find the Julian Day Number corresponding to the base time
@@ -2978,7 +2918,6 @@ proc ::tcl::clock::AssignBaseWeek {date baseTime timeZone changeover} {
#----------------------------------------------------------------------
proc ::tcl::clock::AssignBaseJulianDay { date baseTime timeZone changeover } {
-
variable TZData
# Find the Julian Day Number corresponding to the base time
@@ -3008,7 +2947,6 @@ proc ::tcl::clock::AssignBaseJulianDay { date baseTime timeZone changeover } {
#----------------------------------------------------------------------
proc ::tcl::clock::InterpretHMSP { date } {
-
set hr [dict get $date hourAMPM]
if { $hr == 12 } {
set hr 0
@@ -3018,7 +2956,6 @@ proc ::tcl::clock::InterpretHMSP { date } {
}
dict set date hour $hr
return [InterpretHMS $date[set date {}]]
-
}
#----------------------------------------------------------------------
@@ -3041,11 +2978,11 @@ proc ::tcl::clock::InterpretHMSP { date } {
#----------------------------------------------------------------------
proc ::tcl::clock::InterpretHMS { date } {
-
- return [expr { ( [dict get $date hour] * 60
- + [dict get $date minute] ) * 60
- + [dict get $date second] }]
-
+ return [expr {
+ ( [dict get $date hour] * 60
+ + [dict get $date minute] ) * 60
+ + [dict get $date second]
+ }]
}
#----------------------------------------------------------------------
@@ -3068,7 +3005,6 @@ proc ::tcl::clock::InterpretHMS { date } {
#----------------------------------------------------------------------
proc ::tcl::clock::GetSystemTimeZone {} {
-
variable CachedSystemTimeZone
variable TimeZoneBad
@@ -3101,76 +3037,69 @@ proc ::tcl::clock::GetSystemTimeZone {} {
} else {
return $timezone
}
-
}
#----------------------------------------------------------------------
#
# ConvertLegacyTimeZone --
#
-# Given an alphanumeric time zone identifier and the system
-# time zone, convert the alphanumeric identifier to an
-# unambiguous time zone.
+# 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.
+# 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?
+# 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]
}
-
+ return [dict get $LegacyTimeZone $tzname]
}
#----------------------------------------------------------------------
#
# SetupTimeZone --
#
-# Given the name or specification of a time zone, sets up
-# its in-memory data.
+# Given the name or specification of a time zone, sets up its in-memory
+# data.
#
# Parameters:
# tzname - Name of a time zone
#
# Results:
-# Unless the time zone is ':localtime', sets the TZData array
-# to contain the lookup table for local<->UTC conversion.
-# Returns an error if the time zone cannot be parsed.
+# Unless the time zone is ':localtime', sets the TZData array to contain
+# the lookup table for local<->UTC conversion. Returns an error if the
+# time zone cannot be parsed.
#
#----------------------------------------------------------------------
proc ::tcl::clock::SetupTimeZone { timezone } {
-
variable TZData
if {! [info exists TZData($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] } {
-
+ } elseif {
+ [regexp {^([-+])(\d\d)(?::?(\d\d)(?::?(\d\d))?)?} $timezone \
+ -> s hh mm ss]
+ } then {
# Make a fixed offset
::scan $hh %d hh
@@ -3191,24 +3120,21 @@ proc ::tcl::clock::SetupTimeZone { timezone } {
set TZData($timezone) [list [list $MINWIDE $offset -1 $timezone]]
} elseif { [string index $timezone 0] eq {:} } {
-
# Convert using a time zone file
- if {
+ if {
[catch {
LoadTimeZoneFile [string range $timezone 1 end]
- }]
- && [catch {
+ }] && [catch {
LoadZoneinfoFile [string range $timezone 1 end]
}]
- } {
+ } then {
return -code error \
-errorcode [list CLOCK badTimeZone $timezone] \
"time zone \"$timezone\" not found"
}
-
+
} elseif { ![catch {ParsePosixTimeZone $timezone} tzfields] } {
-
# This looks like a POSIX time zone - try to process it
if { [catch {ProcessPosixTimeZone $tzfields} data opts] } {
@@ -3221,9 +3147,8 @@ proc ::tcl::clock::SetupTimeZone { timezone } {
}
} else {
-
- # We couldn't parse this as a POSIX time zone. Try
- # again with a time zone file - this time without a colon
+ # 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] } {
@@ -3247,25 +3172,22 @@ proc ::tcl::clock::SetupTimeZone { timezone } {
# None.
#
# Results:
-# Returns a time zone specifier that corresponds to the system
-# time zone information found in the Registry.
+# 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!
+# 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.
+# 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
@@ -3296,16 +3218,14 @@ proc ::tcl::clock::GuessWindowsTimeZone {} {
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)
+ # 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]
@@ -3353,11 +3273,11 @@ proc ::tcl::clock::GuessWindowsTimeZone {} {
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.
+ # 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] \
@@ -3366,11 +3286,11 @@ proc ::tcl::clock::GuessWindowsTimeZone {} {
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.
+ # 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] \
@@ -3378,10 +3298,9 @@ proc ::tcl::clock::GuessWindowsTimeZone {} {
: [::format %02d $stdSecond]
}
dict set WinZoneInfo $data $tzname
- }
+ }
return [dict get $WinZoneInfo $data]
-
}
#----------------------------------------------------------------------
@@ -3410,18 +3329,18 @@ proc ::tcl::clock::LoadTimeZoneFile { fileName } {
return
}
- # Since an unsafe interp uses the [clock] command in the master,
- # this code is security sensitive. Make sure that the path name
- # cannot escape the given directory.
+ # Since an unsafe interp uses the [clock] command in the master, this code
+ # is security sensitive. Make sure that the path name cannot escape the
+ # given directory.
if { ![regexp {^[[.-.][:alpha:]_]+(?:/[[.-.][:alpha:]_]+)*$} $fileName] } {
return -code error \
-errorcode [list CLOCK badTimeZone $:fileName] \
"time zone \":$fileName\" not valid"
}
- if { [catch {
+ try {
source -encoding utf-8 [file join $DataDir $fileName]
- }] } {
+ } on error {} {
return -code error \
-errorcode [list CLOCK badTimeZone :$fileName] \
"time zone \":$fileName\" not found"
@@ -3439,8 +3358,8 @@ proc ::tcl::clock::LoadTimeZoneFile { fileName } {
# fileName - Relative path name of the file to load.
#
# Results:
-# Returns an empty result normally; returns an error if no
-# Olson file was found or the file was malformed in some way.
+# Returns an empty result normally; returns an error if no Olson file
+# was found or the file was malformed in some way.
#
# Side effects:
# TZData(:fileName) contains the time zone data
@@ -3448,12 +3367,11 @@ proc ::tcl::clock::LoadTimeZoneFile { fileName } {
#----------------------------------------------------------------------
proc ::tcl::clock::LoadZoneinfoFile { fileName } {
-
variable ZoneinfoPaths
- # Since an unsafe interp uses the [clock] command in the master,
- # this code is security sensitive. Make sure that the path name
- # cannot escape the given directory.
+ # Since an unsafe interp uses the [clock] command in the master, this code
+ # is security sensitive. Make sure that the path name cannot escape the
+ # given directory.
if { ![regexp {^[[.-.][:alpha:]_]+(?:/[[.-.][:alpha:]_]+)*$} $fileName] } {
return -code error \
@@ -3482,15 +3400,14 @@ proc ::tcl::clock::LoadZoneinfoFile { fileName } {
# 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.
+# 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
@@ -3509,8 +3426,8 @@ proc ::tcl::clock::ReadZoneinfoFile {fileName fname} {
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.
+ # 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 $d a4a1x15IIIIII \
magic version nIsGMT nIsStd nLeap nTime nType nChar
@@ -3528,18 +3445,19 @@ proc ::tcl::clock::ReadZoneinfoFile {fileName fname} {
return -code error "$fileName contains leap seconds"
}
- # In a version 2 file, we use the second part of the file, which
- # contains 64-bit transition times.
+ # 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
- }]
+ 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}} {
@@ -3563,9 +3481,9 @@ proc ::tcl::clock::ReadZoneinfoFile {fileName fname} {
}
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.
+ # 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
@@ -3573,10 +3491,10 @@ proc ::tcl::clock::ReadZoneinfoFile {fileName fname} {
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.
+ # 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 ${nChar}
@@ -3606,8 +3524,8 @@ proc ::tcl::clock::ReadZoneinfoFile {fileName fname} {
}
# In a version 2 file, there is also a POSIX-style time zone description
- # at the very end of the file. To get to it, skip over
- # nLeap leap second values (8 bytes each),
+ # at the very end of the file. To get to it, skip over nLeap leap second
+ # values (8 bytes each),
# nIsStd standard/DST indicators and nIsGMT UTC/local indicators.
if {$version eq {2}} {
@@ -3640,8 +3558,8 @@ proc ::tcl::clock::ReadZoneinfoFile {fileName fname} {
# tz Time zone specifier to be interpreted
#
# Results:
-# Returns a dictionary whose values contain the various pieces of
-# the time zone specification.
+# Returns a dictionary whose values contain the various pieces of the
+# time zone specification.
#
# Side effects:
# None.
@@ -3652,7 +3570,7 @@ proc ::tcl::clock::ReadZoneinfoFile {fileName fname} {
# 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
+# 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
@@ -3697,14 +3615,13 @@ proc ::tcl::clock::ReadZoneinfoFile {fileName fname} {
# 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.
+#
+# 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
@@ -3715,8 +3632,8 @@ proc ::tcl::clock::ParsePosixTimeZone { tz } {
([[:digit:]]{1,2})
(?:
# 4 - Standard time zone offset, minutes
- : ([[:digit:]]{1,2})
- (?:
+ : ([[:digit:]]{1,2})
+ (?:
# 5 - Standard time zone offset, seconds
: ([[:digit:]]{1,2} )
)?
@@ -3732,8 +3649,8 @@ proc ::tcl::clock::ParsePosixTimeZone { tz } {
([[:digit:]]{1,2})
(?:
# 9 - DST time zone offset, minutes
- : ([[:digit:]]{1,2})
- (?:
+ : ([[:digit:]]{1,2})
+ (?:
# 10 - DST time zone offset, seconds
: ([[:digit:]]{1,2})
)?
@@ -3746,8 +3663,8 @@ proc ::tcl::clock::ParsePosixTimeZone { tz } {
( J ? ) ( [[:digit:]]+ )
| M
# 13 - Month number 14 - Week of month 15 - Day of week
- ( [[:digit:]] + )
- [.] ( [[:digit:]] + )
+ ( [[:digit:]] + )
+ [.] ( [[:digit:]] + )
[.] ( [[:digit:]] + )
)
(?:
@@ -3768,8 +3685,8 @@ proc ::tcl::clock::ParsePosixTimeZone { tz } {
( J ? ) ( [[:digit:]]+ )
| M
# 21 - Month number 22 - Week of month 23 - Day of week
- ( [[:digit:]] + )
- [.] ( [[:digit:]] + )
+ ( [[:digit:]] + )
+ [.] ( [[:digit:]] + )
[.] ( [[:digit:]] + )
)
(?:
@@ -3796,27 +3713,21 @@ proc ::tcl::clock::ParsePosixTimeZone { tz } {
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\""
-
}
+ 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.
+# Handle a Posix time zone after it's been broken out into fields.
#
# Parameters:
# z - Dictionary returned from 'ParsePosixTimeZone'
@@ -3830,7 +3741,6 @@ proc ::tcl::clock::ParsePosixTimeZone { tz } {
#----------------------------------------------------------------------
proc ::tcl::clock::ProcessPosixTimeZone { z } {
-
variable MINWIDE
variable TZData
@@ -3845,20 +3755,20 @@ proc ::tcl::clock::ProcessPosixTimeZone { z } {
} else {
set stdSignum -1
}
- set stdHours [lindex [::scan [dict get $z stdHours] %d] 0]
+ 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]
+ 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]
+ set stdSeconds [lindex [::scan [dict get $z stdSeconds] %d] 0]
} else {
set stdSeconds 0
}
- set stdOffset [expr { ( ( $stdHours * 60 + $stdMinutes )
- * 60 + $stdSeconds )
- * $stdSignum }]
+ set stdOffset [expr {
+ (($stdHours * 60 + $stdMinutes) * 60 + $stdSeconds) * $stdSignum
+ }]
set data [list [list $MINWIDE $stdOffset 0 $stdName]]
# If there's no daylight zone, we're done
@@ -3881,20 +3791,20 @@ proc ::tcl::clock::ProcessPosixTimeZone { z } {
if { [dict get $z dstHours] eq {} } {
set dstOffset [expr { 3600 + $stdOffset }]
} else {
- set dstHours [lindex [::scan [dict get $z dstHours] %d] 0]
+ 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]
+ 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]
+ set dstSeconds [lindex [::scan [dict get $z dstSeconds] %d] 0]
} else {
set dstSeconds 0
}
- set dstOffset [expr { ( ( $dstHours * 60 + $dstMinutes )
- * 60 + $dstSeconds )
- * $dstSignum }]
+ set dstOffset [expr {
+ (($dstHours*60 + $dstMinutes) * 60 + $dstSeconds) * $dstSignum
+ }]
}
# Fill in defaults for European or US DST rules
@@ -3903,8 +3813,10 @@ proc ::tcl::clock::ProcessPosixTimeZone { z } {
# 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 {
+ [dict get $z startDayOfYear] eq {}
+ && [dict get $z startMonth] eq {}
+ } then {
if {($stdSignum * $stdHours>=0) && ($stdSignum * $stdHours<=12)} {
# EU
dict set z startWeekOfMonth 5
@@ -3923,8 +3835,10 @@ proc ::tcl::clock::ProcessPosixTimeZone { z } {
dict set z startMinutes 0
dict set z startSeconds 0
}
- if { [dict get $z endDayOfYear] eq {}
- && [dict get $z endMonth] eq {} } {
+ if {
+ [dict get $z endDayOfYear] eq {}
+ && [dict get $z endMonth] eq {}
+ } then {
if {($stdSignum * $stdHours>=0) && ($stdSignum * $stdHours<=12)} {
# EU
dict set z endMonth 10
@@ -3964,15 +3878,14 @@ proc ::tcl::clock::ProcessPosixTimeZone { z } {
}
return $data
-
-}
+}
#----------------------------------------------------------------------
#
# DeterminePosixDSTTime --
#
-# Determines the time that Daylight Saving Time starts or ends
-# from a Posix time zone specification.
+# Determines the time that Daylight Saving Time starts or ends from a
+# Posix time zone specification.
#
# Parameters:
# z - Time zone data returned from ParsePosixTimeZone.
@@ -3982,13 +3895,12 @@ proc ::tcl::clock::ProcessPosixTimeZone { z } {
# 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.
+# 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
@@ -3996,18 +3908,16 @@ proc ::tcl::clock::DeterminePosixDSTTime { z bound y } {
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]
+ && [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]
@@ -4022,8 +3932,9 @@ proc ::tcl::clock::DeterminePosixDSTTime { z bound y } {
}
set jd [dict get $date julianDay]
- set seconds [expr { wide($jd) * wide(86400)
- - wide(210866803200) }]
+ set seconds [expr {
+ wide($jd) * wide(86400) - wide(210866803200)
+ }]
set h [dict get $z ${bound}Hours]
if { $h eq {} } {
@@ -4045,7 +3956,6 @@ proc ::tcl::clock::DeterminePosixDSTTime { z bound y } {
}
set tod [expr { ( $h * 60 + $m ) * 60 + $s }]
return [expr { $seconds + $tod }]
-
}
#----------------------------------------------------------------------
@@ -4063,26 +3973,26 @@ proc ::tcl::clock::DeterminePosixDSTTime { z bound y } {
# for the target locale.
#
# Results:
-# Returns the dictionary, augmented with the keys, 'localeEra'
-# and 'localeYear'.
+# 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 }]
+ 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] }]
+ dict set date localeYear [expr {
+ [dict get $date year] - [lindex $etable $index 2]
+ }]
}
return $date
-
}
#----------------------------------------------------------------------
@@ -4100,10 +4010,9 @@ proc ::tcl::clock::GetLocaleEra { date etable } {
# 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).
+# 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.
@@ -4114,7 +4023,6 @@ proc ::tcl::clock::GetLocaleEra { date etable } {
#----------------------------------------------------------------------
proc ::tcl::clock::GetJulianDayFromEraYearDay {date changeover} {
-
# Get absolute year number from the civil year
switch -exact -- [dict get $date era] {
@@ -4130,21 +4038,25 @@ proc ::tcl::clock::GetJulianDayFromEraYearDay {date changeover} {
# 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 ) }]
-
+ 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 ) }]
+ set jd [expr {
+ 1721423
+ + [dict get $date dayOfYear]
+ + ( 365 * $ym1 )
+ + ( $ym1 / 4 )
+ }]
}
dict set date julianDay $jd
@@ -4155,8 +4067,8 @@ proc ::tcl::clock::GetJulianDayFromEraYearDay {date changeover} {
#
# GetJulianDayFromEraYearMonthWeekDay --
#
-# Determines the Julian Day number corresponding to the nth
-# given day-of-the-week in a given month.
+# 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'
@@ -4175,10 +4087,9 @@ proc ::tcl::clock::GetJulianDayFromEraYearDay {date changeover} {
#----------------------------------------------------------------------
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)
+ # 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]
@@ -4194,7 +4105,6 @@ proc ::tcl::clock::GetJulianDayFromEraYearMonthWeekDay {date changeover} {
[dict get $date2 julianDay]]
dict set date julianDay [expr { $wd0 + 7 * $week }]
return $date
-
}
#----------------------------------------------------------------------
@@ -4217,9 +4127,8 @@ proc ::tcl::clock::GetJulianDayFromEraYearMonthWeekDay {date changeover} {
#----------------------------------------------------------------------
proc ::tcl::clock::IsGregorianLeapYear { date } {
-
switch -exact -- [dict get $date era] {
- BCE {
+ BCE {
set year [expr { 1 - [dict get $date year]}]
}
CE {
@@ -4237,15 +4146,14 @@ proc ::tcl::clock::IsGregorianLeapYear { date } {
} else {
return 1
}
-
}
#----------------------------------------------------------------------
#
# WeekdayOnOrBefore --
#
-# Determine the nearest day of week (given by the 'weekday'
-# parameter, Sunday==0) on or before a given Julian Day.
+# 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
@@ -4260,18 +4168,16 @@ proc ::tcl::clock::IsGregorianLeapYear { date } {
#----------------------------------------------------------------------
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.
+# Service procedure that does binary search in several places inside the
+# 'clock' command.
#
# Parameters:
# list - List of lists, sorted in ascending order by the
@@ -4279,8 +4185,8 @@ proc ::tcl::clock::WeekdayOnOrBefore { weekday j } {
# key - Value to search for
#
# Results:
-# Returns the index of the greatest element in $list that is less
-# than or equal to $key.
+# Returns the index of the greatest element in $list that is less than
+# or equal to $key.
#
# Side effects:
# None.
@@ -4288,7 +4194,6 @@ proc ::tcl::clock::WeekdayOnOrBefore { weekday j } {
#----------------------------------------------------------------------
proc ::tcl::clock::BSearch { list key } {
-
if {[llength $list] == 0} {
return -1
}
@@ -4300,13 +4205,12 @@ proc ::tcl::clock::BSearch { list key } {
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.
+ # 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] } {
@@ -4350,15 +4254,14 @@ proc ::tcl::clock::BSearch { list key } {
# 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.
+# 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 \
@@ -4377,15 +4280,10 @@ proc ::tcl::clock::add { clockval args } {
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
}
@@ -4397,8 +4295,7 @@ proc ::tcl::clock::add { clockval args } {
set timezone $b
}
default {
- return -code error \
- -errorcode [list CLOCK badSwitch $a] \
+ throw [list CLOCK badSwitch $a] \
"bad switch \"$a\",\
must be -gmt, -locale or -timezone"
}
@@ -4414,20 +4311,16 @@ proc ::tcl::clock::add { clockval args } {
"cannot use -gmt and -timezone in same call"
}
if { [catch { expr { wide($clockval) } } result] } {
- return -code error \
- "expected integer but got \"$clockval\""
+ 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
- }
+ if { ![string is boolean -strict $gmt] } {
+ return -code error "expected boolean value but got \"$gmt\""
+ } elseif { $gmt } {
+ set timezone :GMT
}
EnterLocale $locale oldLocale
-
+
set changeover [mc GREGORIAN_CHANGE_DATE]
if {[catch {SetupTimeZone $timezone} retval opts]} {
@@ -4435,29 +4328,25 @@ proc ::tcl::clock::add { clockval args } {
return -options $opts $retval
}
- set status [catch {
-
+ try {
foreach { quantity unit } $offsets {
-
switch -exact -- $unit {
-
years - year {
- set clockval \
- [AddMonths [expr { 12 * $quantity }] \
- $clockval $timezone $changeover]
+ set clockval [AddMonths [expr { 12 * $quantity }] \
+ $clockval $timezone $changeover]
}
months - month {
set clockval [AddMonths $quantity $clockval $timezone \
- $changeover]
+ $changeover]
}
weeks - week {
set clockval [AddDays [expr { 7 * $quantity }] \
- $clockval $timezone $changeover]
+ $clockval $timezone $changeover]
}
days - day {
set clockval [AddDays $quantity $clockval $timezone \
- $changeover]
+ $changeover]
}
hours - hour {
@@ -4471,31 +4360,24 @@ proc ::tcl::clock::add { clockval args } {
}
default {
- error "unknown unit \"$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]
+ throw [list CLOCK badUnit $unit] \
+ "unknown unit \"$unit\", must be \
+ years, months, weeks, days, hours, minutes or seconds"
}
}
}
- } result opts]
-
- # Restore the locale
-
- if { [info exists oldLocale] } {
- mclocale $oldLocale
- }
+ return $clockval
+ } trap CLOCK {result opts} {
+ # Conceal the innards of [clock] when it's an expected error
+ dict unset opts -errorinfo
+ return -options $opts $result
+ } finally {
+ # Restore the locale
- if { $status == 1 } {
- if { [lindex [dict get $opts -errorcode] 0] eq {CLOCK} } {
- dict unset opts -errorinfo
+ if { [info exists oldLocale] } {
+ mclocale $oldLocale
}
- return -options $opts $result
- } else {
- return $clockval
}
-
}
#----------------------------------------------------------------------
@@ -4520,7 +4402,6 @@ proc ::tcl::clock::add { clockval args } {
#----------------------------------------------------------------------
proc ::tcl::clock::AddMonths { months clockval timezone changeover } {
-
variable DaysInRomanMonthInCommonYear
variable DaysInRomanMonthInLeapYear
variable TZData
@@ -4528,8 +4409,9 @@ proc ::tcl::clock::AddMonths { months clockval timezone changeover } {
# 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 secondOfDay [expr {
+ [dict get $date localSeconds] % 86400
+ }]
dict set date tzName $timezone
# Add the requisite number of months
@@ -4558,23 +4440,23 @@ proc ::tcl::clock::AddMonths { months clockval timezone changeover } {
set date [GetJulianDayFromEraYearMonthDay \
$date[set date {}]\
$changeover]
- dict set date localSeconds \
- [expr { -210866803200
- + ( 86400 * wide([dict get $date julianDay]) )
- + [dict get $date secondOfDay] }]
+ 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.
+# 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)
@@ -4584,8 +4466,7 @@ proc ::tcl::clock::AddMonths { months clockval timezone changeover } {
# in the target locale.
#
# Results:
-# Returns the new clock value as a number of seconds since
-# the epoch.
+# Returns the new clock value as a number of seconds since the epoch.
#
# Side effects:
# None.
@@ -4593,14 +4474,14 @@ proc ::tcl::clock::AddMonths { months clockval timezone changeover } {
#----------------------------------------------------------------------
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 secondOfDay [expr {
+ [dict get $date localSeconds] % 86400
+ }]
dict set date tzName $timezone
# Add the requisite number of days
@@ -4609,23 +4490,23 @@ proc ::tcl::clock::AddDays { days clockval timezone changeover } {
# Reconvert to a number of seconds
- dict set date localSeconds \
- [expr { -210866803200
- + ( 86400 * wide([dict get $date julianDay]) )
- + [dict get $date secondOfDay] }]
+ 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.
+# Wrapper around ::msgcat::mc that caches the result according to the
+# locale.
#
# Parameters:
# Accepts the name of the message to retrieve.
@@ -4646,11 +4527,10 @@ proc ::tcl::clock::mc { name } {
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
}
+ set val [::msgcat::mc $name]
+ dict set McLoaded $Locale $name $val
+ return $val
}
#----------------------------------------------------------------------
@@ -4671,7 +4551,6 @@ proc ::tcl::clock::mc { name } {
#----------------------------------------------------------------------
proc ::tcl::clock::ClearCaches {} {
-
variable FormatProc
variable LocaleNumeralCache
variable McLoaded
@@ -4691,5 +4570,4 @@ proc ::tcl::clock::ClearCaches {} {
catch {unset CachedSystemTimeZone}
set TimeZoneBad {}
InitTZData
-
}