Parsing user logs

Parsing user logs

The application shall allow for parsing user logs. The format of the log will be provided by a user created XML file.

vcdMaker

The application shall accept additional option: -u <log_format_file>

vcdMerge

The configuration is passed by the first parameter of the source description. The user format shall be passed by the ‘U’ option as follows:: U{<log_format_file>}.

User log configuration

The expected XML configuration structure has been described below.

<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
<!DOCTYPE signals SYSTEM "vcdMaker.dtd">
<signals>

<vector>
    <line> Regular expression describing the line including group matching </line>
    <timestamp> Timestamp expression </timestamp>
    <name> Name expression </name>
    <value> Integer value expression </value>
    <size> Size expression </size> 
</vector>

<real>
    <line> Regular expression describing the line including group matching </line>
    <timestamp> Timestamp expression </timestamp>
    <name> Name expression </name>
    <value> Float value expression </value>
</real>

<event>
    <line> Regular expression describing the line including group matching </line>
    <timestamp> Timestamp expression </timestamp>
    <name> Name expression </name>
</event>

…
</signals>

</log_configuration >

There might exist several vector, real or event nodes. According to the user needs. The syntax of the XML file can be verified with the provided DTD file:

<?xml version="1.0" encoding="UTF-8"?>
<!ELEMENT signals   (vector | real | event)*>

<!ELEMENT vector    (   line,
                        timestamp,
                        name,
                        value,
                        size)
>
<!ELEMENT real      (   line,
                        timestamp,
                        name,
                        value)
>
<!ELEMENT event     (   line,
                        timestamp,
                        name)
>
<!ELEMENT line (#PCDATA)>
<!ELEMENT timestamp (#PCDATA)>
<!ELEMENT name (#PCDATA)>
<!ELEMENT value (#PCDATA)>
<!ELEMENT size (#PCDATA)>

To parse the original vcdMaker format one could use the configuration file below:

<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
<!DOCTYPE signals SYSTEM "vcdMaker.dtd">
<signals>

<vector>
    <line>#([[:d:]]+) ([[:graph:]]+) ([[:d:]]+) ([[:d:]]+)( +.*)?</line>
    <timestamp>dec(1)</timestamp>
    <name>txt(2)</name>
    <value>dec(3)</value>
    <size>dec(4)</size>
</vector>

<real>
    <line>#([[:d:]]+) ([[:graph:]]+) ([[:d:][:punct:]]+) f( +.*)?</line>
    <timestamp>dec(1)</timestamp>
    <name>txt(2)</name>
    <value>flt(3)</value>
</real>

<event>
    <line>#([[:d:]]+) ([[:graph:]]+) e( +.*)?</line>
    <timestamp>dec(1)</timestamp>
    <name>txt(2)</name>
</event>

</signals >