+++ /dev/null
-package Parse::Binary::Nested;
-
-use strict;
-use warnings;
-
-use Carp;
-
-our $VERSION = '1.00';
-
-sub new {
- my ($class, $format) = @_;
- ref $format eq 'ARRAY'
- or croak "Invalid Parse::Binary::Nested format: should be an array ref";
- bless $format, $class;
-}
-
-sub template {
- my ($self, $format) = @_;
- # total (flattened) unpack template from nested format definitions
- return join '', map {
- my $value = $format->[-($_ << 1) - 1];
- if (ref $value eq 'ARRAY') {
- my $count = $value->[0];
- $value = $self->template($value);
- $value = $count =~ s/^([*\d]+)// ? "$count($value)$1"
- : $count."X[$count]$count/($value)";
- }
- else {
- $value =~ s/^C(a)(\d+)/$1 . ($2 + 1)/e; # length prefix
- }
- $value;
- } reverse 0 .. ($#$format - 1) >> 1;
-}
-
-sub convert {
- my ($self, $format, $data) = @_;
- # map flat results into a named and nested hash
- my %res;
- while (my ($field, $template) = splice @$format, 0, 2) {
- if (ref $template eq 'ARRAY') {
- my ($count, @subformat) = @$template;
- my $max = $count =~ s/^(\d+)// ? $1 : 0;
- $count = !$count ? $max
- : $count eq '*' ? $res{levelcount}->{total} : shift @$data;
- $res{$field}->[$_] = $self->convert([@subformat], $data) for 0 .. ($max || $count)-1;
- splice @{ $res{$field} }, $count if $max > $count;
- $res{$field} = $res{$field}->[0] if $max == 1;
- next;
- }
- elsif ($template =~ /^Ca/) {
- $data->[0] = unpack 'C/a', $data->[0];
- }
- elsif ($template =~ /^(?:[xX]\d*)*$/) {
- next; # no values
- }
- $res{$field} = shift @$data;
- }
- return \%res;
-}
-
-sub unpackf {
- my ($self, $input) = @_;
- my @data = unpack $self->template($self), $input;
- return $self->convert([@$self], \@data);
-}
-
-1;
-
-=head1 NAME
-
-Parse::Binary::Nested - Structured unpack
-
-=head1 SYNOPSIS
-
- use Parse::Binary::Nested;
- my $parser = Parser::Binary::Nested->new([
- foos => [
- 'C', # count
- message => 'Z*',
- period => 'C',
- ],
- trail => 'a*',
- ]);
-
- my $data = $parser->unpackf("\1foo\0.rest");
- print $data->{foos}->[0]->{message};
-
-=head1 DESCRIPTION
-
-=head1 AUTHOR
-
-Mischa POSLAWSKY <perl@shiar.org>
-
-=head1 LICENSE
-
-GPL version 3.
-