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https://issues.apache.org/jira/browse/DAFFODIL-2173?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16875250#comment-16875250
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Olabusayo Kilo commented on DAFFODIL-2173:
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First pass at a solution, involves the following steps
# Determine bitorder and byteorder of data at current position (finfo)
# Check if bitPosition is mid byte.
## If it's mid byte, call fillByteArray (currently private) for bits up to the
next byte boundary. Update byteLimit.
##
{code:java}
// val bitsAlreadyCosumed = loc.bitPos0b % 8
// val firstByteBitArray = new Array[Byte](1)
/* if (bitsAlreadyConsumed != 0 ) // mid-byte {
* bitsToDisplay = 8 - bitsAlreadyConsumed
* inStream.fillByteArray(firstByteBitarray, bitsToDisplay, finfo)
* bytesLimit -= 1 //we've taken care of first byte
* }{code}
# Call inputSource.get as usual, either with byteLimit 1 less, or unchanged.
Decode this byte array as is currently done.
# Use bitOrder and byteOrder to display bitArray (e.g xxxxx100 or 100xxxxx)
> Data dumps should be bit-aware
> ------------------------------
>
> Key: DAFFODIL-2173
> URL: https://issues.apache.org/jira/browse/DAFFODIL-2173
> Project: Daffodil
> Issue Type: Bug
> Components: Debugger
> Affects Versions: 2.4.0
> Reporter: Olabusayo Kilo
> Assignee: Olabusayo Kilo
> Priority: Major
>
> Data dumps print out bytes without regard to the bit offset. So if some bits
> have already been consumed, the dumps might include those already consumed
> bits.
> Ideally we would like to be bit sensitive. A possible solution would be to
> track if the first byte of the left over data, already had consumed bytes i.e
> ended mid-byte, and only display those non consumed bits. That is, if the
> data ended at bit 5, and bit order is mostSignificantBitFirst, then this
> picture would look like xxxxx000 (where the 0's are the actual left over data
> bits in that first byte of the left over data.) If bitOrder is
> leastSignificantBitFirst the picture would look like 000xxxxx.
> inStream.fillByteArray takes the bit offset into accound and can be utilized.
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