long.pm

视频监控网络部分的协议ddns,的模块的实现代码,请大家大胆指正.

	    # Link to global $opt_XXX variable.
	    # Make sure a valid perl identifier results.
	    my $ov = $orig;
	    $ov =~ s/\W/_/g;
	    if ( $opctl{$name}[CTL_DEST] == CTL_DEST_ARRAY ) {
		print STDERR ("=> link \"$orig\" to \@$pkg","::opt_$ov\n")
		    if $debug;
		eval ("\$linkage{\$orig} = \\\@".$pkg."::opt_$ov;");
	    }
	    elsif ( $opctl{$name}[CTL_DEST] == CTL_DEST_HASH ) {
		print STDERR ("=> link \"$orig\" to \%$pkg","::opt_$ov\n")
		    if $debug;
		eval ("\$linkage{\$orig} = \\\%".$pkg."::opt_$ov;");
	    }
	    else {
		print STDERR ("=> link \"$orig\" to \$$pkg","::opt_$ov\n")
		    if $debug;
		eval ("\$linkage{\$orig} = \\\$".$pkg."::opt_$ov;");
	    }
	}
    }

    # Bail out if errors found.
    die ($error) if $error;
    $error = 0;

    # Supply --version and --help support, if needed and allowed.
    if ( defined($auto_version) ? $auto_version : ($requested_version >= 2.3203) ) {
	if ( !defined($opctl{version}) ) {
	    $opctl{version} = ['','version',0,CTL_DEST_CODE,undef];
	    $linkage{version} = \&VersionMessage;
	}
	$auto_version = 1;
    }
    if ( defined($auto_help) ? $auto_help : ($requested_version >= 2.3203) ) {
	if ( !defined($opctl{help}) && !defined($opctl{'?'}) ) {
	    $opctl{help} = $opctl{'?'} = ['','help',0,CTL_DEST_CODE,undef];
	    $linkage{help} = \&HelpMessage;
	}
	$auto_help = 1;
    }

    # Show the options tables if debugging.
    if ( $debug ) {
	my ($arrow, $k, $v);
	$arrow = "=> ";
	while ( ($k,$v) = each(%opctl) ) {
	    print STDERR ($arrow, "\$opctl{$k} = $v ", OptCtl($v), "\n");
	    $arrow = "   ";
	}
    }

    # Process argument list
    my $goon = 1;
    while ( $goon && @$argv > 0 ) {

	# Get next argument.
	$opt = shift (@$argv);
	print STDERR ("=> arg \"", $opt, "\"\n") if $debug;

	# Double dash is option list terminator.
	if ( $opt eq $argend ) {
	  push (@ret, $argend) if $passthrough;
	  last;
	}

	# Look it up.
	my $tryopt = $opt;
	my $found;		# success status
	my $key;		# key (if hash type)
	my $arg;		# option argument
	my $ctl;		# the opctl entry

	($found, $opt, $ctl, $arg, $key) =
	  FindOption ($argv, $prefix, $argend, $opt, \%opctl);

	if ( $found ) {

	    # FindOption undefines $opt in case of errors.
	    next unless defined $opt;

	    my $argcnt = 0;
	    while ( defined $arg ) {

		# Get the canonical name.
		print STDERR ("=> cname for \"$opt\" is ") if $debug;
		$opt = $ctl->[CTL_CNAME];
		print STDERR ("\"$ctl->[CTL_CNAME]\"\n") if $debug;

		if ( defined $linkage{$opt} ) {
		    print STDERR ("=> ref(\$L{$opt}) -> ",
				  ref($linkage{$opt}), "\n") if $debug;

		    if ( ref($linkage{$opt}) eq 'SCALAR'
			 || ref($linkage{$opt}) eq 'REF' ) {
			if ( $ctl->[CTL_TYPE] eq '+' ) {
			    print STDERR ("=> \$\$L{$opt} += \"$arg\"\n")
			      if $debug;
			    if ( defined ${$linkage{$opt}} ) {
			        ${$linkage{$opt}} += $arg;
			    }
		            else {
			        ${$linkage{$opt}} = $arg;
			    }
			}
			elsif ( $ctl->[CTL_DEST] == CTL_DEST_ARRAY ) {
			    print STDERR ("=> ref(\$L{$opt}) auto-vivified",
					  " to ARRAY\n")
			      if $debug;
			    my $t = $linkage{$opt};
			    $$t = $linkage{$opt} = [];
			    print STDERR ("=> push(\@{\$L{$opt}, \"$arg\")\n")
			      if $debug;
			    push (@{$linkage{$opt}}, $arg);
			}
			elsif ( $ctl->[CTL_DEST] == CTL_DEST_HASH ) {
			    print STDERR ("=> ref(\$L{$opt}) auto-vivified",
					  " to HASH\n")
			      if $debug;
			    my $t = $linkage{$opt};
			    $$t = $linkage{$opt} = {};
			    print STDERR ("=> \$\$L{$opt}->{$key} = \"$arg\"\n")
			      if $debug;
			    $linkage{$opt}->{$key} = $arg;
			}
			else {
			    print STDERR ("=> \$\$L{$opt} = \"$arg\"\n")
			      if $debug;
			    ${$linkage{$opt}} = $arg;
		        }
		    }
		    elsif ( ref($linkage{$opt}) eq 'ARRAY' ) {
			print STDERR ("=> push(\@{\$L{$opt}, \"$arg\")\n")
			    if $debug;
			push (@{$linkage{$opt}}, $arg);
		    }
		    elsif ( ref($linkage{$opt}) eq 'HASH' ) {
			print STDERR ("=> \$\$L{$opt}->{$key} = \"$arg\"\n")
			    if $debug;
			$linkage{$opt}->{$key} = $arg;
		    }
		    elsif ( ref($linkage{$opt}) eq 'CODE' ) {
			print STDERR ("=> &L{$opt}(\"$opt\"",
				      $ctl->[CTL_DEST] == CTL_DEST_HASH ? ", \"$key\"" : "",
				      ", \"$arg\")\n")
			    if $debug;
			my $eval_error = do {
			    local $@;
			    local $SIG{__DIE__}  = '__DEFAULT__';
			    eval {
				&{$linkage{$opt}}
				  (Getopt::Long::CallBack->new
				   (name    => $opt,
				    ctl     => $ctl,
				    opctl   => \%opctl,
				    linkage => \%linkage,
				    prefix  => $prefix,
				   ),
				   $ctl->[CTL_DEST] == CTL_DEST_HASH ? ($key) : (),
				   $arg);
			    };
			    $@;
			};
			print STDERR ("=> die($eval_error)\n")
			  if $debug && $eval_error ne '';
			if ( $eval_error =~ /^!/ ) {
			    if ( $eval_error =~ /^!FINISH\b/ ) {
				$goon = 0;
			    }
			}
			elsif ( $eval_error ne '' ) {
			    warn ($eval_error);
			    $error++;
			}
		    }
		    else {
			print STDERR ("Invalid REF type \"", ref($linkage{$opt}),
				      "\" in linkage\n");
			die("Getopt::Long -- internal error!\n");
		    }
		}
		# No entry in linkage means entry in userlinkage.
		elsif ( $ctl->[CTL_DEST] == CTL_DEST_ARRAY ) {
		    if ( defined $userlinkage->{$opt} ) {
			print STDERR ("=> push(\@{\$L{$opt}}, \"$arg\")\n")
			    if $debug;
			push (@{$userlinkage->{$opt}}, $arg);
		    }
		    else {
			print STDERR ("=>\$L{$opt} = [\"$arg\"]\n")
			    if $debug;
			$userlinkage->{$opt} = [$arg];
		    }
		}
		elsif ( $ctl->[CTL_DEST] == CTL_DEST_HASH ) {
		    if ( defined $userlinkage->{$opt} ) {
			print STDERR ("=> \$L{$opt}->{$key} = \"$arg\"\n")
			    if $debug;
			$userlinkage->{$opt}->{$key} = $arg;
		    }
		    else {
			print STDERR ("=>\$L{$opt} = {$key => \"$arg\"}\n")
			    if $debug;
			$userlinkage->{$opt} = {$key => $arg};
		    }
		}
		else {
		    if ( $ctl->[CTL_TYPE] eq '+' ) {
			print STDERR ("=> \$L{$opt} += \"$arg\"\n")
			  if $debug;
			if ( defined $userlinkage->{$opt} ) {
			    $userlinkage->{$opt} += $arg;
			}
			else {
			    $userlinkage->{$opt} = $arg;
			}
		    }
		    else {
			print STDERR ("=>\$L{$opt} = \"$arg\"\n") if $debug;
			$userlinkage->{$opt} = $arg;
		    }
		}

		$argcnt++;
		last if $argcnt >= $ctl->[CTL_AMAX] && $ctl->[CTL_AMAX] != -1;
		undef($arg);

		# Need more args?
		if ( $argcnt < $ctl->[CTL_AMIN] ) {
		    if ( @$argv ) {
			if ( ValidValue($ctl, $argv->[0], 1, $argend, $prefix) ) {
			    $arg = shift(@$argv);
			    $arg =~ tr/_//d if $ctl->[CTL_TYPE] =~ /^[iIo]$/;
			    ($key,$arg) = $arg =~ /^([^=]+)=(.*)/
			      if $ctl->[CTL_DEST] == CTL_DEST_HASH;
			    next;
			}
			warn("Value \"$$argv[0]\" invalid for option $opt\n");
			$error++;
		    }
		    else {
			warn("Insufficient arguments for option $opt\n");
			$error++;
		    }
		}

		# Any more args?
		if ( @$argv && ValidValue($ctl, $argv->[0], 0, $argend, $prefix) ) {
		    $arg = shift(@$argv);
		    $arg =~ tr/_//d if $ctl->[CTL_TYPE] =~ /^[iIo]$/;
		    ($key,$arg) = $arg =~ /^([^=]+)=(.*)/
		      if $ctl->[CTL_DEST] == CTL_DEST_HASH;
		    next;
		}
	    }
	}

	# Not an option. Save it if we $PERMUTE and don't have a <>.
	elsif ( $order == $PERMUTE ) {
	    # Try non-options call-back.
	    my $cb;
	    if ( (defined ($cb = $linkage{'<>'})) ) {
		print STDERR ("=> &L{$tryopt}(\"$tryopt\")\n")
		  if $debug;
		my $eval_error = do {
		    local $@;
		    local $SIG{__DIE__}  = '__DEFAULT__';
		    eval { &$cb ($tryopt) };
		    $@;
		};
		print STDERR ("=> die($eval_error)\n")
		  if $debug && $eval_error ne '';
		if ( $eval_error =~ /^!/ ) {
		    if ( $eval_error =~ /^!FINISH\b/ ) {
			$goon = 0;
		    }
		}
		elsif ( $eval_error ne '' ) {
		    warn ($eval_error);
		    $error++;
		}
	    }
	    else {
		print STDERR ("=> saving \"$tryopt\" ",
			      "(not an option, may permute)\n") if $debug;
		push (@ret, $tryopt);
	    }
	    next;
	}

	# ...otherwise, terminate.
	else {
	    # Push this one back and exit.
	    unshift (@$argv, $tryopt);
	    return ($error == 0);
	}

    }

    # Finish.
    if ( @ret && $order == $PERMUTE ) {
	#  Push back accumulated arguments
	print STDERR ("=> restoring \"", join('" "', @ret), "\"\n")
	    if $debug;
	unshift (@$argv, @ret);
    }

    return ($error == 0);
}

# A readable representation of what's in an optbl.
sub OptCtl ($) {
    my ($v) = @_;
    my @v = map { defined($_) ? ($_) : ("<undef>") } @$v;
    "[".
      join(",",
	   "\"$v[CTL_TYPE]\"",
	   "\"$v[CTL_CNAME]\"",
	   "\"$v[CTL_DEFAULT]\"",
	   ("\$","\@","\%","\&")[$v[CTL_DEST] || 0],
	   $v[CTL_AMIN] || '',
	   $v[CTL_AMAX] || '',
#	   $v[CTL_RANGE] || '',
#	   $v[CTL_REPEAT] || '',
	  ). "]";
}

# Parse an option specification and fill the tables.
sub ParseOptionSpec ($$) {
    my ($opt, $opctl) = @_;

    # Match option spec.
    if ( $opt !~ m;^
		   (
		     # Option name
		     (?: \w+[-\w]* )
		     # Alias names, or "?"
		     (?: \| (?: \? | \w[-\w]* )? )*
		   )?
		   (
		     # Either modifiers ...
		     [!+]
		     |
		     # ... or a value/dest/repeat specification
		     [=:] [ionfs] [@%]? (?: \{\d*,?\d*\} )?
		     |
		     # ... or an optional-with-default spec
		     : (?: -?\d+ | \+ ) [@%]?
		   )?
		   $;x ) {
	return (undef, "Error in option spec: \"$opt\"\n");
    }

    my ($names, $spec) = ($1, $2);
    $spec = '' unless defined $spec;

    # $orig keeps track of the primary name the user specified.
    # This name will be used for the internal or external linkage.
    # In other words, if the user specifies "FoO|BaR", it will
    # match any case combinations of 'foo' and 'bar', but if a global
    # variable needs to be set, it will be $opt_FoO in the exact case
    # as specified.
    my $orig;

    my @names;
    if ( defined $names ) {
	@names =  split (/\|/, $names);
	$orig = $names[0];
    }
    else {
	@names = ('');
	$orig = '';
    }

    # Construct the opctl entries.
    my $entry;
    if ( $spec eq '' || $spec eq '+' || $spec eq '!' ) {
	# Fields are hard-wired here.
	$entry = [$spec,$orig,undef,CTL_DEST_SCALAR,0,0];
    }
    elsif ( $spec =~ /^:(-?\d+|\+)([@%])?$/ ) {
	my $def = $1;
	my $dest = $2;
	my $type = $def eq '+' ? 'I' : 'i';
	$dest ||= '$';
	$dest = $dest eq '@' ? CTL_DEST_ARRAY
	  : $dest eq '%' ? CTL_DEST_HASH : CTL_DEST_SCALAR;
	# Fields are hard-wired here.
	$entry = [$type,$orig,$def eq '+' ? undef : $def,
		  $dest,0,1];
    }
    else {
	my ($mand, $type, $dest) =
	  $spec =~ /^([=:])([ionfs])([@%])?(\{(\d+)?(,)?(\d+)?\})?$/;
	return (undef, "Cannot repeat while bundling: \"$opt\"\n")
	  if $bundling && defined($4);
	my ($mi, $cm, $ma) = ($5, $6, $7);
	return (undef, "{0} is useless in option spec: \"$opt\"\n")
	  if defined($mi) && !$mi && !defined($ma) && !defined($cm);

	$type = 'i' if $type eq 'n';
	$dest ||= '$';
	$dest = $dest eq '@' ? CTL_DEST_ARRAY
	  : $dest eq '%' ? CTL_DEST_HASH : CTL_DEST_SCALAR;
	# Default minargs to 1/0 depending on mand status.
	$mi = $mand eq '=' ? 1 : 0 unless defined $mi;
	# Adjust mand status according to minargs.
	$mand = $mi ? '=' : ':';
	# Adjust maxargs.
	$ma = $mi ? $mi : 1 unless defined $ma || defined $cm;
	return (undef, "Max must be greater than zero in option spec: \"$opt\"\n")
	  if defined($ma) && !$ma;
	return (undef, "Max less than min in option spec: \"$opt\"\n")
	  if defined($ma) && $ma < $mi;

	# Fields are hard-wired here.
	$entry = [$type,$orig,undef,$dest,$mi,$ma||-1];
    }

    # Process all names. First is canonical, the rest are aliases.
    my $dups = '';
    foreach ( @names ) {

	$_ = lc ($_)
	  if $ignorecase > (($bundling && length($_) == 1) ? 1 : 0);

	if ( exists $opctl->{$_} ) {
	    $dups .= "Duplicate specification \"$opt\" for option \"$_\"\n";
	}

	if ( $spec eq '!' ) {
	    $opctl->{"no$_"} = $entry;
	    $opctl->{"no-$_"} = $entry;
	    $opctl->{$_} = [@$entry];
	    $opctl->{$_}->[CTL_TYPE] = '';
	}
	else {
	    $opctl->{$_} = $entry;
	}
    }

    if ( $dups && $^W ) {