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Posted by RB on February 8, 2008, 12:11 pm
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Hi,
I'm trying to use Data::Dumper to determine how to read a structure
and determine how to unpack it. I'm seeing entries for INTYPE with
values of 8 or 9. Where would I find what a type 8 or 9 is and
generally how to interpret the output?
I'm running perl v5.8.8 build 822
'TYPE' => {
'DECIMALS' => 0,
'NAME' => 'TYPE',
'POSITION' => 1,
'OFFSET' => 0,
'INTYPE' => 9,
'LEN' => 2,
'EXID' => 's'
},
'LOAD1_AVG' => {
'DECIMALS' => 0,
'NAME' => 'LOAD1_AVG',
'POSITION' => 5,
'OFFSET' => 12,
'INTYPE' => 8,
'LEN' => 4,
'EXID' => 'I'
},
'NBR_CPU' => {
'DECIMALS' => 0,
'NAME' => 'NBR_CPU',
'POSITION' => 4,
'OFFSET' => 8,
'INTYPE' => 8,
'LEN' => 4,
'EXID' => 'I'
},
Thanks,
Russ
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Posted by Mark Clements on February 8, 2008, 12:35 pm
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RB wrote:
> Hi,
>
> I'm trying to use Data::Dumper to determine how to read a structure
> and determine how to unpack it. I'm seeing entries for INTYPE with
> values of 8 or 9. Where would I find what a type 8 or 9 is and
> generally how to interpret the output?
>
> I'm running perl v5.8.8 build 822
<snip>
> },
> 'NBR_CPU' => {
> 'DECIMALS' => 0,
> 'NAME' => 'NBR_CPU',
> 'POSITION' => 4,
> 'OFFSET' => 8,
> 'INTYPE' => 8,
> 'LEN' => 4,
> 'EXID' => 'I'
> },
That would depend on the application that created the data structure. It
has nothing to do with Data::Dumper per se. The documentation for
Data::Dumper would probably be a good start, though.
http://search.cpan.org/~ilyam/Data-Dumper-2.121/Dumper.pm
Mark
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Posted by Jim Gibson on February 8, 2008, 12:49 pm
Please log in for more thread options In article
> Hi,
>
> I'm trying to use Data::Dumper to determine how to read a structure
> and determine how to unpack it. I'm seeing entries for INTYPE with
> values of 8 or 9. Where would I find what a type 8 or 9 is and
> generally how to interpret the output?
>
> I'm running perl v5.8.8 build 822
>
> 'TYPE' => {
> 'DECIMALS' => 0,
> 'NAME' => 'TYPE',
> 'POSITION' => 1,
> 'OFFSET' => 0,
> 'INTYPE' => 9,
> 'LEN' => 2,
> 'EXID' => 's'
> },
[ rest snipped]
Perl structures like the above are actually a hash of hashes. You don't
show how you built your hash or the code that prints it, but it looks
like you have a hash with 3 elements. The values are references to 3
more hashes, each with 7 elements.
The => is a 'fat comma' that indicates a key/value pair as part of a
hash. The { indicates a reference to an anonymous hash with its own
key/value pairs. A [ character would indicate a reference to an array.
You can access the values like this:
print $hash->;
or
print $hash;
which would print the output TYPE.
See 'perldoc perldata' for more details on Perl data structures.
If you need any more help, please post a short program that
demonstrates your problem.
Thanks.
--
Jim Gibson
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