Michael Beckerle created DAFFODIL-2119:
------------------------------------------
Summary: Debugger RTL data dumps are nibbles-reversed
Key: DAFFODIL-2119
URL: https://issues.apache.org/jira/browse/DAFFODIL-2119
Project: Daffodil
Issue Type: Bug
Components: Debugger
Affects Versions: 2.3.0
Reporter: Michael Beckerle
This is what the debugger outputs for parsing one of the tests for
mil-std-2045, test2045msghdr1.
It detects that this is bitOrder leastSignificantBitFirst data and so presents
the data Right-to-Left order, which is good.
{code:java}
fedcba9876543210 ffee ddcc bbaa 9988 7766 5544 3322 1100 87654321
cø€␀␀␀wü␚’gU€␀gä 368f 0800 0000 77cf a129 7655 0800 764e :00000000
␀␀␁›¶þ␐HD 00 0010 b96b ef01 8444 :00000010{code}
However, this is gibberish, as the bytes of this data (left-to-right) are E4 67
00 80 55....
So presented Right-to-left the values in the bytes shouldn't change. But if you
look at the data dump above, the bytes are 4e 76 00 08 55.... which means the
nibbles of each byte have been swapped.
That's just plain wrong. Bit order doesn't change the numeric value of any byte.
These displays are useless.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
