r5979 - trunk/gnue-common/src/printing/barcodes

[jcater]

Author: jcater
Date: 2004-07-14 16:55:53 -0500 (Wed, 14 Jul 2004)
New Revision: 5979

Modified:
   trunk/gnue-common/src/printing/barcodes/postnet.py
Log:
corrections to the postnet check digit algorithm (it wasn't modulo-10); postnet 
has been verified against samples from the usps now.

Modified: trunk/gnue-common/src/printing/barcodes/postnet.py
===================================================================
--- trunk/gnue-common/src/printing/barcodes/postnet.py  2004-07-14 21:06:58 UTC 
(rev 5978)
+++ trunk/gnue-common/src/printing/barcodes/postnet.py  2004-07-14 21:55:53 UTC 
(rev 5979)
@@ -54,7 +54,7 @@
 
   lineWidth = 1.44 # points
   lineHeight = 8.5 # (.125")
-  spaceWidth = 1.66
+  spaceWidth = 1.9 #1.66
 
   encodingMap = {
     # Stroke?, X Multiplier, Y Multiplier
@@ -75,7 +75,10 @@
         v += int(ch)
       except ValueError:
         raise InvalidBarcode
-    return self.chars[divmod(v,10)[1]]
+    cd = abs(10-divmod(v,10)[1])
+    if cd == 10:
+      cd = 0
+    return self.chars[cd]
 
 
 if __name__ == '__main__':
@@ -89,6 +92,6 @@
 
 #   test('381072456','png','test1.png')
 #   test('381172459','tiff','test1.tif')
-  test('123456789','eps','postnet-1.eps')
+  test('383759907','eps','postnet-1.eps')
   test('12345','eps','postnet-2.eps')
   test('12345678901','eps','postnet-3.eps')