/ 
Test-HexDifferences-0.002
River stage one • 2 direct dependents • 8 total dependents
/ Test::HexDifferences::HexDump

NAME

Test::HexDifferences::HexDump - Format binary to hexadecimal strings

VERSION

0.002

SYNOPSIS

use Test::HexDifferences::HexDump;

$string = hex_dump(
    $binary,
);

$string = hex_dump(
    $binary,
    {
        address => $start_address,
        format  => "%a : %4C : %d\n",
    }
);

Format elements

Every format element in the format string is starting with % like sprintf.

Data format

It is not very clever to use little-endian formats for tests. There is a fallback to bytes if multibyte formats can not displayed.

%C  - unsigned char
%S  - unsigned 16-bit
%S< - unsigned 16-bit, little-endian
%S> - unsigned 16-bit, big-endian
%v  - unsigned 16-bit, little-endian
%n  - unsigned 16-bit, big-endian
%L  - unsigned 32-bit
%L< - unsigned 32-bit, little-endian
%L> - unsigned 32-bit, big-endian
%V  - unsigned 32-bit, little-endian
%N  - unsigned 32-bit, big-endian
%Q  - unsigned 64-bit
%Q< - unsigned 64-bit, little-endian
%Q> - unsigned 64-bit, big-endian

Address format

%a  - 16 bit address
%4a - 16 bit address
%8a - 32 bit address

ascii format

It can not display all chars. Fist it must be a printable ascii char. It can not be anything of space, q{.}, q{'}, q{"} or q{\}. Otherwise q{.} will be printed.

%d - display ascii

Repetition

%*x - repetition endless
%1x - repetition 1 time
%2x - repetition 2 times
...

Special formats

%\n - ignore \n

Default format

The default format is:

"%a : %4C : %d\n"

or fully written as

"%a : %4C : %d\n%*x"

Complex formats

The %...x allows to write mixed formats e.g.

Format:
 %a : %N %4C : %d\n%1x%
 %a : %n %2C : %d\n%*x
Input:
   \0x01\0x23\0x45\0x67\0x89\0xAB\0xCD\0xEF
   \0x01\0x23\0x45\0x67
   \0x89\0xAB\0xCD\0xEF
Output:
   0000 : 01234567 89 AB CD EF : .#-Eg...
   0008 : 0123 45 67 : .#-E
   000C : 89AB CD EF : g...

EXAMPLE

Inside of this Distribution is a directory named example. Run this *.t files.

DESCRIPTION

This is a formatter for binary data.

SUBROUTINES/METHODS

subroutine hex_dump

$string = hex_dump(
    $binary,
    {
        address => $display_start_address,
        format  => $format_string,
    }
);

DIAGNOSTICS

nothing

CONFIGURATION AND ENVIRONMENT

nothing

DEPENDENCIES

Hash::Util

Perl6::Export::Attrs

INCOMPATIBILITIES

none

BUGS AND LIMITATIONS

none

SEE ALSO

Test::HexDifferences

Data::Hexdumper inspired by

AUTHOR

Steffen Winkler

LICENSE AND COPYRIGHT

Copyright (c) 2012, Steffen Winkler <steffenw at cpan.org>. All rights reserved.

This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.