--- a/ZipArchive.st	Tue Feb 18 12:13:28 2014 +0100
+++ b/ZipArchive.st	Tue Feb 18 14:53:32 2014 +0100
@@ -3127,6 +3127,22 @@
     "Modified: / 20.10.1998 / 00:30:02 / cg"
 ! !
 
+!ZipArchive class methodsFor:'utilities'!
+
+dateToZipFileDate:aDate
+    "/ data in msdos format
+    ^ (((aDate day) 
+        bitOr: (aDate month bitShift: 5)) 
+        bitOr: (((aDate year) - 1980) bitShift: 9))
+!
+
+timeToZipFileTime:aTime
+    "/ time in msdos format
+    ^ (((aTime seconds // 2) 
+        bitOr: (aTime minutes bitShift: 5)) 
+        bitOr: (aTime hours bitShift: 11))
+! !
+
 !ZipArchive methodsFor:'Compatibility-Squeak'!
 
 binaryContentsOf: fileName
@@ -4186,7 +4202,7 @@
 addFile:aFileName fromStream:aStream compressMethod:theCompressMethodArg asDirectory:isDirectory
     "do not create directories (isDirectory = true) - they are not compatible between operating systems"
 
-    |zipEntry curTime curDate theZipFileName theCompressMethod streamBufferSize buffer 
+    |zipEntry theZipFileName theCompressMethod streamBufferSize buffer 
      crc32 unCompressedDataSize startDataPosition nextBlockSize myZipStream|
 
     (file isNil or: [mode ~~ #write]) ifTrue: [
@@ -4218,11 +4234,8 @@
         zipEntry externalFileAttributes: EXTERNALFILEATTRIBUTES_ISFILE.
     ].
 
-    curTime := Time now.
-    curDate := Date today.
     "/ data and time in msdos format
-    zipEntry lastModFileTime: (((curTime seconds // 2) bitOr: (curTime minutes rightShift: -5)) bitOr: (curTime hours rightShift: -11)).
-    zipEntry lastModFileDate: (((curDate day) bitOr: (curDate month rightShift: -5)) bitOr: (((curDate year) - 1980) rightShift: -9)).
+    zipEntry setModificationTimeAndDateToNow.
 
     "/ ensure that the file position is at the end
     file setToEnd.
@@ -4309,7 +4322,7 @@
 basicAddFile:aFileName withContents:data compressMethod:theCompressMethodArg asDirectory:isDirectory 
     "do not create directories (isDirectory = true) - they are not compatible between operating systems"
     
-    | zipEntry  theCompressedData  curTime  curDate  theZipFileName  theCompressMethod |
+    | zipEntry  theCompressedData theZipFileName  theCompressMethod |
 
     (file isNil or:[ mode ~~ #write ]) ifTrue:[
         ^ self error:'ZipArchive not open for writing ...'.
@@ -4345,18 +4358,10 @@
         zipEntry internalFileAttributes: 1.
         zipEntry externalFileAttributes: EXTERNALFILEATTRIBUTES_ISFILE.
     ].
-    curTime := Time now.
-    curDate := Date today.
     
     "/ data and time in msdos format
-    
-    zipEntry 
-        lastModFileTime:(((curTime seconds // 2) 
-                bitOr:(curTime minutes rightShift:-5)) 
-                    bitOr:(curTime hours rightShift:-11)).
-    zipEntry 
-        lastModFileDate:(((curDate day) bitOr:(curDate month rightShift:-5)) 
-                bitOr:(((curDate year) - 1980) rightShift:-9)).
+    zipEntry setModificationTimeAndDateToNow.
+
     data notEmptyOrNil ifTrue:[
         "/ crc32 is allways reqired (not as written in docu to be zero in case of uncompressed mode)
         zipEntry crc32:(ZipStream crc32BytesIn:data).
@@ -4405,7 +4410,7 @@
 writeStreamFor:nameOfFileInArchive compressMethod:theCompressMethodArg
     "create new entry in central directory"
 
-    |zipEntry curTime curDate theZipFileName theCompressMethod|
+    |zipEntry theZipFileName theCompressMethod|
 
     (file isNil or:[mode ~~ #write]) ifTrue: [
         ^ self error: 'ZipArchive not open for writing ...'.
@@ -4431,11 +4436,8 @@
     zipEntry internalFileAttributes: 1.
     zipEntry externalFileAttributes: EXTERNALFILEATTRIBUTES_ISFILE.
 
-    curTime := Time now.
-    curDate := Date today.
     "/ data and time in msdos format
-    zipEntry lastModFileTime: (((curTime seconds // 2) bitOr: (curTime minutes rightShift: -5)) bitOr: (curTime hours rightShift: -11)).
-    zipEntry lastModFileDate: (((curDate day) bitOr: (curDate month rightShift: -5)) bitOr: (((curDate year) - 1980) rightShift: -9)).
+    zipEntry setModificationTimeAndDateToNow.
 
     "/ ensure that the file position is at the end
     file setToEnd.
@@ -4443,8 +4445,7 @@
     zipEntry writeTo:file.
     self addMember:zipEntry.
 
-    ^ (ZipWriteStream zipFileStream:file zipEntry:zipEntry)
-        zipArchive:self.
+    ^ (ZipWriteStream zipFileStream:file zipEntry:zipEntry) zipArchive:self.
 
     "Modified: / 19-11-2010 / 15:38:54 / cg"
 ! !
@@ -4818,6 +4819,16 @@
     relativeLocalHeaderOffset := something.
 !
 
+setModificationTimeAndDateToNow
+    |curTime curDate|
+
+    curTime := Time now.                                                   
+    curDate := Date today.
+    "/ data and time in msdos format
+    self lastModFileTime: (ZipArchive timeToZipFileTime:curTime).
+    self lastModFileDate: (ZipArchive dateToZipFileDate:curDate).
+!
+
 uncompressedSize
     ^ uncompressedSize
 !
@@ -5180,11 +5191,11 @@
 !ZipArchive class methodsFor:'documentation'!
 
 version
-    ^ '$Header: /cvs/stx/stx/libbasic2/ZipArchive.st,v 1.111 2013-08-18 10:57:01 cg Exp $'
+    ^ '$Header: /cvs/stx/stx/libbasic2/ZipArchive.st,v 1.112 2014-02-18 13:53:32 cg Exp $'
 !
 
 version_CVS
-    ^ '$Header: /cvs/stx/stx/libbasic2/ZipArchive.st,v 1.111 2013-08-18 10:57:01 cg Exp $'
+    ^ '$Header: /cvs/stx/stx/libbasic2/ZipArchive.st,v 1.112 2014-02-18 13:53:32 cg Exp $'
 ! !