Mike Beckerle created DAFFODIL-2688:
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Summary: prefixed length field when not enough bits available
gives Runtime SDE not parse error
Key: DAFFODIL-2688
URL: https://issues.apache.org/jira/browse/DAFFODIL-2688
Project: Daffodil
Issue Type: Bug
Components: Back End
Affects Versions: 3.3.0
Reporter: Mike Beckerle
When a prefixed length, let's say a 4-byte unsigned int, is being parsed, and
there are not 32-bits available (because, for example you are at end of data),
then you don't get a parse error. Instead you get:
{code:java}
Runtime Schema Definition Error: Prefixed length result must be non-negative
after dfdl:prefixIncludesPrefixLength adjustment , but was: -4 {code}
This needs to be a parse error due to the insufficient bits.
If you trace, you get this:
{code:java}
parser: <BinaryIntegerKnownLengthParser/>
bitPosition: 1920
data:
│ │
87654321 0011 2233 4455 6677 8899 aabb ccdd eeff 0123456789abcdef
infoset:
<?xml version="1.0" encoding="UTF-8"?>
<message (prefixLength)></message (prefixLength)>
diff:
(no differences)
failure:
Parse Error: Insufficient bits in data. Needed 32 bit(s) but found only 0
available.
Schema context: message (prefixLength) Location line 385 in
file:/....../common.dfdl.xsd
Data location was preceding byte 240 limit(bytes) 240
-----------------------------------------------------------------
347org.apache.daffodil.tdml.TDMLExceptionImpl: (Implementation: daffodil)
Runtime Schema Definition Error: Prefixed length result must be non-negative
after dfdl:prefixIncludesPrefixLength adjustment , but was: -4 {code}
So you can see how it's just out of data, yet getting an RSDE on this.
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