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# Done in evals to avoid confusing Perl::MinimumVersion
eval( $] >= 5.006 ? <<'END_NEW' : <<'END_OLD' ); die $@ if $@;
sub _read {
	local *FH;
	open( FH, '<', $_[0] ) or die "open($_[0]): $!";
	my $string = do { local $/; <FH> };
	close FH or die "close($_[0]): $!";
	return $string;
}
END_NEW
sub _read {
	local *FH;
	open( FH, "< $_[0]"  ) or die "open($_[0]): $!";
	my $string = do { local $/; <FH> };
	close FH or die "close($_[0]): $!";
	return $string;
}
END_OLD

sub _readperl {
	my $string = Module::Install::_read($_[0]);
	$string =~ s/(?:\015{1,2}\012|\015|\012)/\n/sg;
	$string =~ s/(\n)\n*__(?:DATA|END)__\b.*\z/$1/s;
	$string =~ s/\n\n=\w+.+?\n\n=cut\b.+?\n+/\n\n/sg;
	return $string;
}

sub _readpod {
	my $string = Module::Install::_read($_[0]);
	$string =~ s/(?:\015{1,2}\012|\015|\012)/\n/sg;
	return $string if $_[0] =~ /\.pod\z/;
	$string =~ s/(^|\n=cut\b.+?\n+)[^=\s].+?\n(\n=\w+|\z)/$1$2/sg;
	$string =~ s/\n*=pod\b[^\n]*\n+/\n\n/sg;
	$string =~ s/\n*=cut\b[^\n]*\n+/\n\n/sg;
	$string =~ s/^\n+//s;
	return $string;
}

# Done in evals to avoid confusing Perl::MinimumVersion
eval( $] >= 5.006 ? <<'END_NEW' : <<'END_OLD' ); die $@ if $@;
sub _write {
	local *FH;
	open( FH, '>', $_[0] ) or die "open($_[0]): $!";
	foreach ( 1 .. $#_ ) {
		print FH $_[$_] or die "print($_[0]): $!";
	}
	close FH or die "close($_[0]): $!";
}
END_NEW
sub _write {
	local *FH;
	open( FH, "> $_[0]"  ) or die "open($_[0]): $!";
	foreach ( 1 .. $#_ ) {
		print FH $_[$_] or die "print($_[0]): $!";
	}
	close FH or die "close($_[0]): $!";
}
END_OLD

# _version is for processing module versions (eg, 1.03_05) not
# Perl versions (eg, 5.8.1).
sub _version ($) {
	my $s = shift || 0;
	my $d =()= $s =~ /(\.)/g;
	if ( $d >= 2 ) {
		# Normalise multipart versions
		$s =~ s/(\.)(\d{1,3})/sprintf("$1%03d",$2)/eg;
	}
	$s =~ s/^(\d+)\.?//;
	my $l = $1 || 0;
	my @v = map {
		$_ . '0' x (3 - length $_)
	} $s =~ /(\d{1,3})\D?/g;
	$l = $l . '.' . join '', @v if @v;
	return $l + 0;
}

sub _cmp ($$) {
	_version($_[1]) <=> _version($_[2]);
}

# Cloned from Params::Util::_CLASS
sub _CLASS ($) {
	(
		defined $_[0]
		and
		! ref $_[0]
		and
		$_[0] =~ m/^[^\W\d]\w*(?:::\w+)*\z/s
	) ? $_[0] : undef;
}

1;

# Copyright 2008 - 2012 Adam Kennedy.