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Anders Blomdell
LabComm
Commits
e6fe7ff8
Commit
e6fe7ff8
authored
Feb 20, 2015
by
Anders Blomdell
Browse files
Merge branch 'master' of gitlab.control.lth.se:anders_blomdell/labcomm
parents
cda634f8
f6f91400
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doc/tech_report.tex
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e6fe7ff8
...
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@@ -666,6 +666,63 @@ LabComm assumes that, while the transport may drop packets, there will
be no bit errors in a received packet. If data integrity is required,
that is delegated to the reader and writer for the particular transport.
\subsubsection
{
Representation of hierarchical data types
}
For a type that contains fields of other user types, like
\begin{verbatim}
typedef struct
{
int x;
int y;
}
Point;
sample struct
{
Point start;
Point end;
}
line;
\end{verbatim}
LabComm encodes both the flattened signature and the
typedef which allows the hierarchical type structure to be
reconstructed.
%
The avro encoding is quite similar.
The
\verb
+
Line
+
example, corresponds to the two schemas
\begin{verbatim}
{
"namespace": "example.avro",
"type": "record",
"name": "Point",
"fields": [
{
"name": "x", "type": "int"
}
,
{
"name": "y", "type": "int"
}
]
}
\end{verbatim}
and
\begin{verbatim}
{
"namespace": "example.avro",
"type": "record",
"name": "Line",
"fields": [
{
"name": "start", "type": "Point"
}
,
{
"name": "end", "type": "Point"
}
]
}
\end{verbatim}
which is encoded in an Object Container File as
\begin{verbatim}
{
"type":"record",
"name":"Line",
"namespace":"example.avro",
"fields":[
{
"name":"start",
"type":
{
"type":"record",
"name":"Point",
"fields":[
{
"name":"x","type":"int"
}
,
{
"name":"y","type":"int"
}
]
}}
,
{
"name":"end",
"type":"Point"
}
]
}
\end{verbatim}
\subsubsection
{
Fetures not in LabComm
}
Avro has a set of features with no counterpart in LabComm. They include
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