Pack command

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Hi Everybody,

I got the following problem using Active Perl:

I have a header with the string:
$header01 = "52494646F8110000514C434D666D74209600000001008D0A";

But to write in a file I need to write this string as a binary, than I use
the following command:
my( $hex ) = pack( 'H*', $header01);

Than, the problem begins here, all the time that the pack command convert
the string and find an "0A", by yourself insert a "0D" before.

Do you know how to took out the "0D" that perl insert by yourself?

Thanks,
Alexandre.

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Re: Pack command

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On 10/4/05, Caldeira Alexandre-WAC075
wrote:
>
> I have a header with the string:
> $header01 =3D "52494646F8110000514C434D666D74209600000001008D0A";
> But to write in a file I need to write this string as a binary, than I
> use the following command:
> my( $hex ) =3D pack( 'H*', $header01);
> Than, the problem begins here, all the time that the pack command conver=
t
> the string and find an "0A", by yourself insert a "0D" before.
> Do you know how to took out the "0D" that perl insert by yourself?
>

Try this:

open( FO, ">foo.out");
binmode FO;
print FO $hex;
close FO;

--
pDale Campbell

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On 10/4/05, Caldeira Alexandre-WAC075 <=
;Alexandre.Caldeira@moto=
rola.com> wrote:

RE: Pack command

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Hi Everybody,

I got the following problem using Active Perl:

I need to read a file that is HEXA encoded. I whant to see (when do a print
command) the HEXA values, like 8D and etc...
Do you know how to open and manage a file in hexa?

All the time that I tried Perl try to convert this to ASCII or UTF-8
encoding...

....
binmode(FILE);
$file_name= $ARGV[0];
open(FILE,$file_name)
|| die "could not open Source file\n";



while()
{
chomp;

#
@linha = split(/8D/); # A partir desse momento $linha[0] vale a primeira
linha
#

....

The idea is to split all the sorce file when found the 80h value.

Thanks,
Alexandre.

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Re: Pack command

Caldeira Alexandre-WAC075 wrote:

>
>
> Hi Everybody,
>
> I got the following problem using Active Perl:
>
> I need to read a file that is HEXA encoded. I whant to see (when do a
> print command) the HEXA values, like 8D and etc...
> Do you know how to open and manage a file in hexa?

Do you mean HEX ASCII when you say HEXA ?

> All the time that I tried Perl try to convert this to ASCII or UTF-8
> encoding...
>
> ...
> binmode(FILE);
> $file_name= $ARGV[0];
> open(FILE,$file_name)
> || die "could not open Source file\n";

# binmode goes after the open.

binmode FILE;

# you may want to slurp the whole file if feasible and then split on
# your 80 or 8D

{ local $/ = undef; $_ = ; }
my @linha = split /8D/i;
close FILE;

> while()
> {
> chomp;
>
> #
> @linha = split(/8D/); # A partir desse momento $linha[0] vale a
> primeira linha
> #
> ...
>
> The idea is to split all the sorce file when found the 80h value.
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Re: Pack command

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In a message dated 11/7/2005 1:17:44 P.M. Eastern Standard Time,
Alexandre.Caldeira@motorola.com writes:

> I got the following problem using Active Perl:
>
> I need to read a file that is HEXA encoded. I whant to see (when do a
print command)
> the HEXA values, like 8D and etc...
> Do you know how to open and manage a file in hexa?
>
> All the time that I tried Perl try to convert this to ASCII or UTF-8
encoding...
>
> ...
> binmode(FILE);

use binmode() on a file handle only AFTER the file is opened, not before.

> $file_name= $ARGV[0];
> open(FILE,$file_name)
> || die "could not open Source file\n";

binmode(FILE); # if needed -- but is it really needed here?

>
> while()
> {
> chomp;
> #
> @linha = split(/8D/); # A partir desse momento $linha[0] vale a
primeira linha
> #
> ...
>
> The idea is to split all the sorce file when found the 80h value.


alexandre --

i see two problems with the code above. one, with the binmode() function,
is already noted. the other is that i do not understand what the HEXA
format is. if this is the intel hex file format (e.g., records like
``:10010000214601360121470136007EFE09D2190140''), then the pack/unpack perl
functions will very nicely decode/encode these records. if HEXA is something else,
please give a link to some web reference defining it (in english, please; my
spanish is very poor) and i or someone else may be able to help.

best regards -- bill walters



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