Anyone a Unicode Services expert? -- roundtrip conversion
- From: charlesm@xxxxxxx (Charles Mills)
- Date: 12 Jun 2012 08:33:27 -0700
My understanding of "roundtrip conversion" is that every code point in the
from CCSID translates to a unique (possibly "meaningless") code point in the
to CCSID so that if for example a customer is so foolish as to transmit, for
example, an object deck from z/OS to a PC in "text" format, and then
transfer it back to z/OS the same way, he will have a good object deck.
I am running Kirk Wolf's excellent showtrtab with the command showtrtab -s
1027 -t 1208 -q R
The results I see include the following:
3F: 1A
40: 20
41: 1A
Several other EBCDIC code points also translate to ASCII sub, 0x1a. So the
question is if multiple EBCDIC code points all translate to 0x1a, how the
heck is this a round trip translation?
(I'm not alleging a bug in showtrtab. I am getting the same results with my
code and ran showtrtab as a reality check and a clearer example.)
Where am I going wrong?
Charles
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