From 02ca88a79487e618d0aa1bf9a949ecb18cbd0acc Mon Sep 17 00:00:00 2001
From: Kevin B Kenny <kennykb@acm.org>
Date: Fri, 10 Sep 2004 17:50:11 +0000
Subject: fixed a bug where %z was always positive in :localtime

---
 ChangeLog         |  6 ++++++
 library/clock.tcl | 11 ++++++-----
 tests/clock.test  | 22 +++++++++++++++++++++-
 3 files changed, 33 insertions(+), 6 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index f0fd156..3821263 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2004-09-10  Kevin Kenny  <kennykb@acm.org>
+
+	* library/clock.tcl: Fixed a bug where %z always put a plus
+	sign on the time zone in :localtime.
+	* tests/clock.test: Added test case for the above bug.
+	
 2004-09-10  Miguel Sofer <msofer@users.sf.net>
 
 	* generic/tclExecute.c (INST_CONCAT1): added a peephole
diff --git a/library/clock.tcl b/library/clock.tcl
index 1152576..d26c2c8 100644
--- a/library/clock.tcl
+++ b/library/clock.tcl
@@ -13,7 +13,7 @@
 # See the file "license.terms" for information on usage and redistribution
 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 #
-# RCS: @(#) $Id: clock.tcl,v 1.4 2004/09/07 17:38:56 kennykb Exp $
+# RCS: @(#) $Id: clock.tcl,v 1.5 2004/09/10 17:50:15 kennykb Exp $
 #
 #----------------------------------------------------------------------
 
@@ -3061,12 +3061,13 @@ proc ::tcl::clock::ConvertUTCToLocalViaC { date } {
  
     # Determine the name and offset of the timezone
 
-    set delta [expr { $localSeconds - $gmtSeconds }]
-    if { $delta <= 0 } {
+    set diff [expr { $localSeconds - $gmtSeconds }]
+    if { $diff <= 0 } {
 	set signum -
-	set delta [expr { - $delta }]
+	set delta [expr { - $diff }]
     } else {
 	set signum +
+	set delta $diff
     }
     set hh [::format %02d [expr { $delta / $SecondsPerHour }]]
     set mm [::format %02d [expr { ($delta / $SecondsPerMinute )
@@ -3081,7 +3082,7 @@ proc ::tcl::clock::ConvertUTCToLocalViaC { date } {
     # Fix the dictionary
 
     dict set date localSeconds $localSeconds
-    dict set date tzOffset $delta
+    dict set date tzOffset $diff
     dict set date tzName $zoneName
     return $date
 
diff --git a/tests/clock.test b/tests/clock.test
index acb7a6e..a83ebf0 100644
--- a/tests/clock.test
+++ b/tests/clock.test
@@ -11,7 +11,7 @@
 # See the file "license.terms" for information on usage and redistribution
 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 #
-# RCS: @(#) $Id: clock.test,v 1.43 2004/09/08 18:46:18 kennykb Exp $
+# RCS: @(#) $Id: clock.test,v 1.44 2004/09/10 17:50:15 kennykb Exp $
 
 if {[lsearch [namespace children] ::tcltest] == -1} {
     package require tcltest 2
@@ -35261,6 +35261,26 @@ test clock-41.1 {regression test - format group %k when hour is 0 } {
     clock format 0 -format %k -gmt true
 } { 0}
 
+test clock-42.1 {regression test - %z in :localtime when west of Greenwich } \
+    -setup {
+	if { [info exists env(TZ)] } {
+	    set oldTZ $env(TZ)
+	}
+	set env(TZ) EST5
+    } \
+    -body {
+	clock format 0 -format %z -timezone :localtime
+    } \
+    -cleanup {
+	if { [info exists oldTZ] } {
+	    set env(TZ) $oldTZ
+	    unset oldTZ
+	} else {
+	    unset env(TZ)
+	}
+    } \
+    -result {-0500}
+
 # cleanup
 
 namespace delete ::testClock
-- 
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