/[suikacvs]/test/cvs

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-revision 1.17 by wakaba,
Sun Apr 21 04:28:46 2002 UTC
+revision 1.40 by wakaba,
Sat Jul 27 04:44:25 2002 UTC
 Line 1
  =head1 NAME
- Message::Header Perl module
+ Message::Header --- A Perl Module for Internet Message Headers
- =head1 DESCRIPTION
- Perl module for RFC 822/2822 message C<header>.
  =cut
  package Message::Header;
  use strict;
- use vars qw($VERSION %REG);
+ use vars qw(%DEFAULT @ISA %REG $VERSION);
- $VERSION = '1.00';
+ $VERSION=do{my @r=(q$Revision$=~/\d+/g);sprintf "%d."."%02d" x $#r,@r};
- use Carp ();
+ require Message::Field::Structured;     ## This may seem silly:-)
- use overload '@{}' => sub { shift->_delete_empty_field->{field} },
+ push @ISA, qw(Message::Field::Structured);
-              '""' => sub { shift->stringify },
-              fallback => 1;
+ %REG = %Message::Util::REG;
+         $REG{M_field} = qr/^([^\x3A]+):$REG{FWS}([\x00-\xFF]*)$/;
- $REG{WSP}     = qr/[\x09\x20]/;
+         $REG{M_fromline} = qr/^\x3E?From$REG{WSP}+([\x00-\xFF]*)$/;
- $REG{FWS}     = qr/[\x09\x20]*/;
+         $REG{ftext} = qr/[\x21-\x39\x3B-\x7E]+/;        ## [2]822
- $REG{M_field} = qr/^([^\x3A]+):$REG{FWS}([\x00-\xFF]*)$/;
+         $REG{NON_ftext} = qr/[^\x21-\x39\x3B-\x7E]/;    ## [2]822
- $REG{M_fromline} = qr/^\x3E?From$REG{WSP}+([\x00-\xFF]*)$/;
+         $REG{NON_ftext_usefor} = qr/[^0-9A-Za-z-]/;     ## name-character
- $REG{UNSAFE_field_name} = qr/[\x00-\x20\x3A\x7F-\xFF]/;
+         $REG{NON_ftext_http} = $REG{NON_http_token};
- =head2 options
+ ## Namespace support
+         our %NS_phname2uri;     ## PH-namespace name -> namespace URI
- These options can be getten/set by C<get_option>/C<set_option>
+         our %NS_uri2package;    ## namespace URI -> Package name
- method.
+         our %NS_uri2phpackage;  ## namespace URI -> PH-Package name
+         require Message::Header::Default;       ## Default namespace
- =head3 capitalize = 0/1
+ ## Initialize of this class -- called by constructors
- (First character of) C<field-name> is capitalized
+ %DEFAULT = (
- when C<stringify>.  (Default = 1)
+     -_HASH_NAME => 'value',
+     -_METHODS   => [qw|field field_exist field_type add replace count delete subject id is|],
- =head3 fold_length = numeric value
+     -_MEMBERS   => [qw|value|],
+     -_VALTYPE_DEFAULT   => ':default',
- Length of line used to fold.  (Default = 70)
+     -by => 'name',
+     -field_format_pattern       => '%s: %s',
- =head3 mail_from = 0/1
+     -field_name_case_sensible   => 0,
+     -field_name_unsafe_rule     => 'NON_ftext',
- Outputs "From " line (known as Un*x From, Mail-From, and so on)
+     -field_name_validation      => 0,
- when C<stringify>.  (Default = 0)
+     -field_sort => 0,
+     -format     => 'mail-rfc2822',
- =cut
+     -header_default_charset     => 'iso-2022-int-1',
+     -header_default_charset_input       => 'iso-2022-int-1',
+     -hook_init_fill_options     => sub {},
+     -hook_stringify_fill_fields => sub {},
+     -linebreak_strict   => 0,
+     -line_length_max    => 60,  ## For folding
+     #ns_default_phuri
+     -output_bcc => 0,
+     -output_folding     => 1,
+     -output_mail_from   => 0,
+     #parse_all
+     -translate_underscore       => 1,
+     #uri_mailto_safe
+     -uri_mailto_safe_level      => 4,
+     -use_folding        => 1,
+     #value_type
+ );
  =head1 CONSTRUCTORS
-Line 53 
 The following methods construct new C<Me
+Line 65 
 The following methods construct new C<Me
  =cut
- ## Initialize
- my %DEFAULT = (
-   capitalize    => 1,
-   fold  => 1,
-   fold_length   => 70,
-   field_format_pattern  => '%s: %s',
-   #field_type   => {},
-   format        => 'mail-rfc2822',
-   mail_from     => 0,
-   output_bcc    => 0,
-   parse_all     => 0,
-   sort  => 'none',
-   translate_underscore  => 1,
-   validate      => 1,
- );
- $DEFAULT{field_type} = {
-         ':DEFAULT'      => 'Message::Field::Unstructured',
-         received        => 'Message::Field::Received',
-         'x-received'    => 'Message::Field::Received',
-         'content-type'  => 'Message::Field::ContentType',
-         'auto-submitted'        => 'Message::Field::ValueParams',
-         'content-disposition'   => 'Message::Field::ValueParams',
-         link    => 'Message::Field::ValueParams',
-         archive => 'Message::Field::ValueParams',
-         'x-face-type'   => 'Message::Field::ValueParams',
-         subject => 'Message::Field::Subject',
-         'x-nsubject'    => 'Message::Field::Subject',
-         'list-software' => 'Message::Field::UA',
-         'user-agent'    => 'Message::Field::UA',
-         server  => 'Message::Field::UA',
-         ## Numeric value
-         'content-length'        => 'Message::Field::Numval',
-         lines   => 'Message::Field::Numval',
-         'max-forwards'  => 'Message::Field::Numval',
-         'mime-version'  => 'Message::Field::Numval',
-         'x-jsmail-priority'     => 'Message::Field::Numval',
-         'x-mail-count'  => 'Message::Field::Numval',
-         'x-ml-count'    => 'Message::Field::Numval',
-         'x-priority'    => 'Message::Field::Numval',
-         path    => 'Message::Field::Path',
- };
- for (qw(archive cancel-lock content-features content-md5
-   disposition-notification-options encoding
-   importance injector-info
-   pics-label posted-and-mailed precedence list-id message-type
-   original-recipient priority
-   sensitivity status x-face x-msmail-priority xref))
-   {$DEFAULT{field_type}->{$_} = 'Message::Field::Structured'}
-         ## Not supported yet, but to be supported...
- for (qw(abuse-reports-to apparently-to approved approved-by bcc cc complaints-to
-   delivered-to disposition-notification-to envelope-to
-   errors-to  from mail-copies-to mail-followup-to mail-reply-to
-   notice-requested-upon-delivery-to read-receipt-to register-mail-reply-requested-by
-   reply-to resent-bcc
-   resent-cc resent-to resent-from resent-sender return-path
-   return-receipt-to return-receipt-requested-to sender to x-abuse-reports-to
-   x-admin x-approved
-   x-beenthere
-   x-confirm-reading-to
-   x-complaints-to x-envelope-from x-envelope-sender
-   x-envelope-to x-ml-address x-ml-command x-ml-to x-nfrom x-nto
-   x-rcpt-to x-sender x-x-sender))
-   {$DEFAULT{field_type}->{$_} = 'Message::Field::Address'}
- for (qw(date date-received delivery-date expires
-   expire-date nntp-posting-date posted posted-date reply-by resent-date
-   x-originalarrivaltime x-tcup-date))
-   {$DEFAULT{field_type}->{$_} = 'Message::Field::Date'}
- for (qw(article-updates client-date content-id in-reply-to message-id
-   obsoletes references replaces resent-message-id see-also supersedes))
-   {$DEFAULT{field_type}->{$_} = 'Message::Field::MsgID'}
- for (qw(accept accept-charset accept-encoding accept-language
-   content-language
-   content-transfer-encoding encrypted followup-to keywords
-   list-archive list-digest list-help list-owner
-   list-post list-subscribe list-unsubscribe list-url uri newsgroups
-   posted-to
-   x-brother x-daughter x-respect x-moe x-syster x-wife))
-   {$DEFAULT{field_type}->{$_} = 'Message::Field::CSV'}
- for (qw(content-alias content-base content-location location referer
-   url x-home-page x-http_referer
-   x-info x-pgp-key x-ml-url x-uri x-url x-web))
-   {$DEFAULT{field_type}->{$_} = 'Message::Field::URI'}
- ## taken from L<HTTP::Header>
- # "Good Practice" order of HTTP message headers:
- #    - General-Headers
- #    - Request-Headers
- #    - Response-Headers
- #    - Entity-Headers
- # (From draft-ietf-http-v11-spec-rev-01, Nov 21, 1997)
- my @header_order = qw(
-   mail-from x-envelope-from relay-version path status
-    cache-control connection date pragma transfer-encoding upgrade trailer via
-    accept accept-charset accept-encoding accept-language
-    authorization expect from host
-    if-modified-since if-match if-none-match if-range if-unmodified-since
-    max-forwards proxy-authorization range referer te user-agent
-    accept-ranges age location proxy-authenticate retry-after server vary
-    warning www-authenticate
-    mime-version
-    allow content-base content-encoding content-language content-length
-    content-location content-md5 content-range content-type
-    etag expires last-modified content-style-type content-script-type
-    link
-   xref
- );
- my %header_order;
  sub _init ($;%) {
    my $self = shift;
    my %options = @_;
-   $self->{field} = [];
+   my $DEFAULT = Message::Util::make_clone (\%DEFAULT);
-   $self->{option} = \%DEFAULT;
+   $self->SUPER::_init (%$DEFAULT, %options);
+   $self->{value} = [];
+   $self->_ns_load_ph ('default');
+   $self->_ns_load_ph ('x-rfc822');
+   $self->_ns_load_ph ('x-http');
+   $self->{option}->{ns_default_phuri} = $self->{ns}->{phname2uri}->{'x-rfc822'}
+     unless $self->{option}->{ns_default_phuri};
+   ## For text/rfc822-headers
+   if (ref $options{entity_header}) {
+     $self->{entity_header} = $options{entity_header};
+     delete $options{entity_header};
+   }
    my @new_fields = ();
    for my $name (keys %options) {
-     if (substr ($name, 0, 1) eq '-') {
+     unless (substr ($name, 0, 1) eq '-') {
-       $self->{option}->{substr ($name, 1)} = $options{$name};
-     } else {
        push @new_fields, ($name => $options{$name});
      }
    }
+   &{ $self->{option}->{hook_init_fill_options} } ($self, $self->{option});
+   $self->_init_by_format ($self->{option}->{format}, $self->{option});
    $self->add (@new_fields, -parse => $self->{option}->{parse_all})
      if $#new_fields > -1;
+ }
-   my $format = $self->{option}->{format};
-   if ($format =~ /cgi/) {
+ sub _init_by_format ($$\%) {
-     unshift @header_order, qw(content-type location);
+   my $self = shift;
-     $self->{option}->{sort} = 'good-practice';
+   my ($format, $option) = @_;
-     $self->{option}->{fold} = 0;
+   if ($format =~ /http/) {
-   } elsif ($format =~ /^http/) {
+     $option->{ns_default_phuri} = $self->{ns}->{phname2uri}->{'x-http'};
-     $self->{option}->{sort} = 'good-practice';
+     if ($format =~ /cgi/) {
+       #unshift @header_order, qw(content-type location);
+       $option->{field_sort} = 'good-practice';
+       $option->{use_folding} = 0;
+     } else {
+       $option->{field_sort} = 'good-practice';
+     }
+   } elsif ($format =~ /mail|news|mime/) {       ## RFC 822
+     $option->{ns_default_phuri} = $self->{ns}->{phname2uri}->{'x-rfc822'};
    }
+   if ($format =~ /uri-url-mailto/) {
-   # Make alternative representations of @header_order.  This is used
+     $option->{output_bcc} = 0;
-   # for sorting.
+     $option->{field_format_pattern} = '%s=%s';
-   my $i = 1;
+     $option->{output_folding} = sub {
-   for (@header_order) {
+       $_[1] =~ s/([^:@+\$A-Za-z0-9\-_.!~*])/sprintf('%%%02X', ord $1)/ge;
-       $header_order{$_} = $i++ unless $header_order{$_};
+       $_[1];
+     };  ## Yes, this is not folding!
    }
  }
- =item Message::Header->new ([%initial-fields/options])
+ =item $msg = Message::Header->new ([%initial-fields/options])
  Constructs a new C<Message::Headers> object.  You might pass some initial
  C<field-name>-C<field-body> pairs and/or options as parameters to the constructor.
-Line 221 
 Example:
+Line 135 
 Example:
  =cut
- sub new ($;%) {
+ ## Inherited
-   my $class = shift;
-   my $self = bless {}, $class;
-   $self->_init (@_);
-   $self;
- }
- =item Message::Header->parse ($header, [%initial-fields/options])
+ =item $msg = Message::Header->parse ($header, [%initial-fields/options])
  Parses given C<header> and constructs a new C<Message::Headers>
  object.  You might pass some additional C<field-name>-C<field-body> pairs
-Line 241 
 sub parse ($$;%) {
+Line 150 
 sub parse ($$;%) {
    my $header = shift;
    my $self = bless {}, $class;
    $self->_init (@_);
-   $header =~ s/\x0D?\x0A$REG{WSP}/\x20/gos;     ## unfold
+   if ($self->{option}->{linebreak_strict}) {
+     $header =~ s/\x0D\x0A$REG{WSP}/\x20/gos if $self->{option}->{use_folding};
+   } else {
+     $header =~ s/\x0D?\x0A$REG{WSP}/\x20/gos if $self->{option}->{use_folding};
+   }
+   my %option = (%{ $self->{option} });
+   $option{parse_all} = 0;
    for my $field (split /\x0D?\x0A/, $header) {
      if ($field =~ /$REG{M_fromline}/) {
-       my $body = $1;
+       my ($s,undef,$value) = $self->_value_to_arrayitem
-       $body = $self->_field_body ($body, 'mail-from')
+         ('mail-from' => $1, \%option);
-         if $self->{option}->{parse_all};
+       push @{$self->{value}}, $value if $s;
-       push @{$self->{field}}, {name => 'mail-from', body => $body};
      } elsif ($field =~ /$REG{M_field}/) {
-       my ($name, $body) = (lc $1, $2);
+       my ($name, $body) = ($1, $2);
-       $name =~ s/$REG{WSP}+$//;
        $body =~ s/$REG{WSP}+$//;
-       $body = $self->_field_body ($body, $name) if $self->{option}->{parse_all};
+       my ($s,undef,$value) = $self->_value_to_arrayitem
-       push @{$self->{field}}, {name => $name, body => $body};
+         ($name => $body, \%option);
-     }
+       push @{$self->{value}}, $value if $s;
+     } elsif (length $field) {
+       my ($s,undef,$value) = $self->_value_to_arrayitem
+         ('x-unknown' => $field, \%option);
+       push @{$self->{value}}, $value if $s;
+     }
+   }
+   $self->_ns_associate_numerical_prefix;        ## RFC 2774 namespace
+   for (@{ $self->{value} }) {
+     no strict 'refs';
+     $_->{name}
+       = &{ ${ &_NS_uri2package ($_->{ns}).'::OPTION' }{n11n_name} }
+       ($self, &_NS_uri2package ($_->{ns}), $_->{name});
+     $_->{body} = $self->_parse_value ($_->{name} => $_->{body}, ns => $_->{ns})
+       if $self->{option}->{parse_all};
    }
    $self;
  }
- =item Message::Header->parse_array (\@header, [%initial-fields/options])
+ =item $msg = Message::Header->parse_array (\@header, [%initial-fields/options])
  Parses given C<header> and constructs a new C<Message::Headers>
  object.  Same as C<Message::Header-E<lt>parse> but this method
-Line 278 
 sub parse_array ($\@;%) {
+Line 205 
 sub parse_array ($\@;%) {
    $self->_init (@_);
    while (1) {
      my $field = shift @$header;
-     while (1) {
+     if ($self->{option}->{use_folding}) {
-       if ($$header[0] =~ /^$REG{WSP}/) {
+       while (1) {
-         $field .= shift @$header;
+         if ($$header[0] =~ /^$REG{WSP}/) {
-       } else {last}
+           $field .= shift @$header;
+         } else {last}
+       }
+     }
+     if ($self->{option}->{linebreak_strict}) {
+       $field =~ s/\x0D\x0A//g;
+     } else {
+       $field =~ tr/\x0D\x0A//d;
      }
-     $field =~ tr/\x0D\x0A//d;   ## BUG: not safe for bar CR/LF
+     local $self->{option}->{parse} = $self->{option}->{parse_all};
      if ($field =~ /$REG{M_fromline}/) {
-       my $body = $1;
+       my ($s,undef,$value) = $self->_value_to_arrayitem
-       $body = $self->_field_body ($body, 'mail-from')
+         ('mail-from' => $1, $self->{option});
-         if $self->{option}->{parse_all};
+       push @{$self->{value}}, $value if $s;
-       push @{$self->{field}}, {name => 'mail-from', body => $body};
      } elsif ($field =~ /$REG{M_field}/) {
-       my ($name, $body) = (lc $1, $2);
+       my ($name, $body) = ($self->_n11n_field_name ($1), $2);
-       $name =~ s/$REG{WSP}+$//;
        $body =~ s/$REG{WSP}+$//;
-       $body = $self->_field_body ($body, $name) if $self->{option}->{parse_all};
+       my ($s,undef,$value) = $self->_value_to_arrayitem
-       push @{$self->{field}}, {name => $name, body => $body};
+         ($name => $body, $self->{option});
+       push @{$self->{value}}, $value if $s;
+     } elsif (length $field) {
+       my ($s,undef,$value) = $self->_value_to_arrayitem
+         ('x-unknown' => $field, $self->{option});
+       push @{$self->{value}}, $value if $s;
      }
      last if $#$header < 0;
    }
+   $self->_ns_associate_numerical_prefix;        ## RFC 2774 namespace
    $self;
  }
-Line 314 
 context, only first one is returned.)
+Line 252 
 context, only first one is returned.)
  =cut
- sub field ($$) {
+ sub field ($@) {shift->SUPER::item (@_)}
+ sub field_exist ($@) {shift->SUPER::item_exist (@_)}
+ ## item-by?, \$checked-item, {item-key => 1}, \%option
+ sub _item_match ($$\$\%\%) {
    my $self = shift;
-   my $name = lc shift;
+   my ($by, $i, $list, $option) = @_;
-   my @ret;
+   return 0 unless ref $$i;  ## Already removed
-   for my $field (@{$self->{field}}) {
+   if ($by eq 'name') {
-     if ($field->{name} eq $name) {
+     my %o = %$option; #$o{parse} = 0;
-       unless (wantarray) {
+     my %l;
-         $field->{body} = $self->_field_body ($field->{body}, $name);
+     for (keys %$list) {
-         return $field->{body};
+       my ($s, undef, $v) = $self->_value_to_arrayitem ($_, '', \%o);
+       if ($s) {
+         $l{$v->{name} . ':' . ( $option->{ns} || $v->{ns} ) } = 1;
        } else {
-         $field->{body} = $self->_field_body ($field->{body}, $name);
+         $l{$v->{name} .':'. ( $option->{ns} || $self->{option}->{ns_default_phuri} ) } = 1;
-         push @ret, $field->{body};
+       }
+     }
+     return 1 if $l{$$i->{name} . ':' . $$i->{ns}};
+   } elsif ($by eq 'ns') {
+     return 1 if $list->{ $$i->{ns} };
+   } elsif ($by eq 'http-ns-define') {
+     if ($$i->{ns} eq $self->{ns}->{phname2uri}->{'x-http'}
+      || $$i->{ns} eq $self->{ns}->{phname2uri}->{'x-http-c'}) {
+       my $n = $$i->{name};
+       if ($n eq 'opt' || $n eq 'c-opt' || $n eq 'man' || $n eq 'c-man') {
+         $option->{parse} = 0;
+         $$i->{body} = $self->_parse_value ($$i->{name} => $$i->{body}, ns => $$i->{ns});
+         for my $j (0..$$i->{body}->count-1) {
+           return 1 if $list->{ ($$i->{body}->value ($j))[0]->value };
+         }
        }
      }
    }
-   if ($#ret < 0) {
+;
-     return $self->add ($name);
-   }
-   @ret;
  }
+ *_delete_match = \&_item_match;
- sub field_exist ($$) {
+ ## Returns returned item value    \$item-value, \%option
-   my $self = shift;
+ sub _item_return_value ($\$\%) {
-   my $name = lc shift;
+   if (ref ${$_[1]}->{body}) {
-   my @ret;
+     ${$_[1]}->{body};
-   for my $field (@{$self->{field}}) {
+   } else {
-     return 1 if ($field->{name} eq $name);
+     ${$_[1]}->{body} = $_[0]->_parse_value (${$_[1]}->{name} => ${$_[1]}->{body},
+       ns => ${$_[1]}->{ns});
+     ${$_[1]}->{body};
+   }
+ }
+ *_add_return_value = \&_item_return_value;
+ *_replace_return_value = \&_item_return_value;
+ ## Returns returned (new created) item value    $name, \%option
+ sub _item_new_value ($$\%) {
+   my $self = shift;
+   my ($name, $option) = @_;
+   if ($option->{by} eq 'http-ns-define') {
+     my $value = $self->_parse_value (opt => '', ns => $self->{ns}->{phname2uri}->{'x-http'});
+     ($value->value (0))[0]->value ($name);
+     {name => 'opt', body => $value, ns => $self->{ns}->{phname2uri}->{'x-http'}};
+   } else {
+     my ($s,undef,$value) = $self->_value_to_arrayitem
+         ($name => '', $option);
+     $s? $value: undef;
    }
-;
  }
- =head2 $self->field_name ($index)
- Returns C<field-name> of $index'th C<field>.
- =head2 $self->field_body ($index)
- Returns C<field-body> of $index'th C<field>.
- =cut
- sub field_name ($$) {
-   my $self = shift;
-   $self->{field}->[shift]->{name};
- }
- sub field_body ($$) {
-   my $self = shift;
-   my $i = shift;
-   $self->{field}->[$i]->{body}
-    = $self->_field_body ($self->{field}->[$i]->{body}, $self->{field}->[$i]->{name});
-   $self->{field}->[$i]->{body};
- }
- sub _field_body ($$$) {
+ ## $self->_parse_value ($type, $value, %options);
-   my $self = shift;
+ sub _parse_value ($$$;%) {
-   my ($body, $name) = @_;
+   my $self = shift;
-   unless (ref $body) {
+   my $name = shift ;#|| $self->{option}->{_VALTYPE_DEFAULT};
-     my $type = $self->{option}->{field_type}->{$name}
+   my $value = shift;  return $value if ref $value;
-             || $self->{option}->{field_type}->{':DEFAULT'};
+   my %option = @_;
-     eval "require $type" or Carp::croak ("_field_body: $type: $@");
+   my $vtype; { no strict 'refs';
-     unless ($body) {
+     my $vt = ${&_NS_uri2package ($option{ns}).'::OPTION'}{value_type};
-       $body = $type->new (-field_name => $name,
+     if (ref $vt) {
-         -format => $self->{option}->{format}
+       $vtype = $vt->{$name} || $vt->{$self->{option}->{_VALTYPE_DEFAULT}};
-         , field_name => $name, format => $self->{option}->{format});
+     }
-     } else {
+     ## For compatiblity.
-       $body = $type->parse ($body, -field_name => $name,
+     unless (ref $vtype) { $vtype = $self->{option}->{value_type}->{$name}
-         -format => $self->{option}->{format},
+       || $self->{option}->{value_type}->{$self->{option}->{_VALTYPE_DEFAULT}} }
-          field_name => $name,format => $self->{option}->{format});
+   }
-     }
+   my $vpackage = $vtype->[0];
+   my %vopt = %{$vtype->[1]} if ref $vtype->[1];
+   if ($vpackage eq ':none:') {
+     return $value;
+   } elsif (length $value) {
+     eval "require $vpackage" or Carp::croak qq{<parse>: $vpackage: Can't load package: $@};
+     return $vpackage->parse ($value,
+       -format   => $self->{option}->{format},
+       -field_ns => $option{ns},
+       -field_name       => $name,
+     -header_default_charset     => $self->{option}->{header_default_charset},
+     -header_default_charset_input       => $self->{option}->{header_default_charset_input},
+     -internal_charset_name      => $self->{option}->{internal_charset_name},
+       -parse_all        => $self->{option}->{parse_all},
+     %vopt);
+   } else {
+     eval "require $vpackage" or Carp::croak qq{<parse>: $vpackage: Can't load package: $@};
+     return $vpackage->new (
+       -format   => $self->{option}->{format},
+       -field_ns => $option{ns},
+       -field_name       => $name,
+     -header_default_charset     => $self->{option}->{header_default_charset},
+     -header_default_charset_input       => $self->{option}->{header_default_charset_input},
+     -internal_charset_name      => $self->{option}->{internal_charset_name},
+       -parse_all        => $self->{option}->{parse_all},
+     %vopt);
+   }
+ }
+ ## Defined for text/rfc822-headers
+ sub entity_header ($;$) {
+   my $self = shift;
+   my $new_header = shift;
+   if (ref $new_header) {
+     $self->{header} = $new_header;
    }
-   $body;
+   $self->{header};
  }
  =head2 $self->field_name_list ()
-Line 397 
 returns ALL names.)
+Line 385 
 returns ALL names.)
  sub field_name_list ($) {
    my $self = shift;
-   $self->_delete_empty_field ();
+   $self->_delete_empty ();
-   map {$_->{name}} @{$self->{field}};
+   map { $_->{name} . ':' . $_->{ns} } @{$self->{value}};
+ }
+ sub namespace_ph_default ($;$) {
+   my $self = shift;
+   if (defined $_[0]) {
+     no strict 'refs';
+     $self->{option}->{ns_default_phuri} = $_[0];
+     $self->_ns_load_ph (${&_NS_uri2package ($self->{option}->{ns_default_phuri}).'::OPTION'}{namespace_phname});
+   }
+   $self->{option}->{ns_default_phuri};
  }
  =item $hdr->add ($field-name, $field-body, [$name, $body, ...])
-Line 424 
 C<-validate>: Checks whether C<field-nam
+Line 422 
 C<-validate>: Checks whether C<field-nam
  =cut
- sub add ($%) {
+ ## [Name: Value] pair -> internal array item
-   my $self = shift;
+ ## $self->_value_to_arrayitem ($name => $value, {%options})
-   my %fields = @_;
+ ## or
-   my %option = %{$self->{option}};
+ ## $self->_value_to_arrayitem ($name => [$value, %value_options], {%options})
-   $option{parse} = defined wantarray unless defined $option{parse};
+ ##
-   for (grep {/^-/} keys %fields) {$option{substr ($_, 1)} = $fields{$_}}
+ ## Return: ((1 = success / 0 = failue), $full_name, $arrayitem)
-   my $body;
+ sub _value_to_arrayitem ($$$\%) {
-   for (grep {/^[^-]/} keys %fields) {
+   my $self = shift;
-     my $name = lc $_;  $body = $fields{$_};
+   my ($name, $value, $option) = @_;
-     $name =~ tr/_/-/ if $option{translate_underscore};
+   my $value_option = {};
-     Carp::croak "add: $name: invalid field-name"
+   if (ref $value eq 'ARRAY') {
-       if $option{validate} && $name =~ /$REG{UNSAFE_field_name}/;
+     ($value, %$value_option) = @$value;
-     $body = $self->_field_body ($body, $name) if $option{parse};
+   }
-     if ($option{prepend}) {
+   my $default_ns = $option->{ns_default_phuri};
-       unshift @{$self->{field}}, {name => $name, body => $body};
+   my $nsuri = $default_ns;
-     } else {
+   $name =~ s/^$REG{WSP}+//;  $name =~ s/$REG{WSP}+$//;
-       push @{$self->{field}}, {name => $name, body => $body};
+   no strict 'refs';
+   if ($value_option->{ns}) {
+     $nsuri = $value_option->{ns};
+   } elsif ($option->{ns}) {
+     $nsuri = $option->{ns};
+   } elsif (($default_ns eq $self->{ns}->{phname2uri}->{'x-http'}
+        && $name =~ s/^([0-9]+)-//)
+     || ($name =~ s/^x-http-([0-9]+)-//i)) {     ## Numric namespace prefix, RFC 2774
+     my $prefix = 0+$1;
+     $nsuri = $self->{ns}->{number2uri}->{ $prefix };
+     unless ($nsuri) {
+       $self->{ns}->{number2uri}->{ $prefix } = 'urn:x-suika-fam-cx:msgpm:header:x-temp:'.$prefix;
+       $nsuri = $self->{ns}->{number2uri}->{ $prefix };
+     }
+   } elsif (
+     ${ &_NS_uri2package ($default_ns).'::OPTION' }{use_ph_namespace}
+     && (
+        ($name =~ s/^([Xx]-[A-Za-z0-9]+|[A-Za-z]*[A-WYZa-wyz0-9][A-Za-z0-9]*)-
+                     ([Xx]-[A-Za-z0-9]+|[A-Za-z0-9]*[A-WYZa-wyz0-9][A-Za-z0-9]*)-//x)
+      || $name =~ s/^([Xx]-[A-Za-z0-9]+|[A-Za-z0-9]*[A-WYZa-wyz0-9][A-Za-z0-9]*)-//
+     )) {
+     my ($prefix1, $prefix2) = ($1, $2);
+     my $original_prefix = $&;  my $one_prefix = 0;
+     unless ($prefix2) {
+       $prefix2 = $prefix1;
+       $prefix1 = $self->{ns}->{uri2phname}->{ $default_ns };
+       $one_prefix = 1;
+     }
+     my $prefix
+       = &{ ${ &_NS_uri2package ($nsuri).'::OPTION' }{n11n_prefix} }
+         ($self, &_NS_uri2package ($nsuri), $prefix1.'-'.$prefix2);
+     $self->_ns_load_ph ($prefix);
+     $nsuri = $self->{ns}->{phname2uri}->{ $prefix };
+     unless ($nsuri) {
+       $nsuri = $default_ns;
+       $prefix
+         = &{ ${ &_NS_uri2package ($nsuri).'::OPTION' }{n11n_prefix} }
+           ($self, &_NS_uri2package ($nsuri), $one_prefix? $prefix2:
+            $prefix1);
+       $self->_ns_load_ph ($prefix);
+       $nsuri = $self->{ns}->{phname2uri}->{ $prefix };
+       if ($nsuri) {
+         $name = $prefix2 . '-' . $name unless $one_prefix;
+       } else {
+         unless ($one_prefix) {
+           $prefix
+             = &{ ${ &_NS_uri2package ($nsuri).'::OPTION' }{n11n_prefix} }
+               ($self, &_NS_uri2package ($nsuri),
+                $self->{ns}->{uri2phname}->{ $default_ns } . '-' . $prefix1);
+           $self->_ns_load_ph ($prefix);
+           $nsuri = $self->{ns}->{phname2uri}->{ $prefix };
+           if ($nsuri) {
+             $name = $prefix2 . '-' . $name;
+           }
+         }
+         unless ($nsuri) {
+           $name = $original_prefix . $name;
+           $nsuri = $default_ns;
+         }
+       }
      }
    }
-   $body if $option{parse};
+   $name
+     = &{ ${ &_NS_uri2package ($nsuri).'::OPTION' }{n11n_name} }
+       ($self, &_NS_uri2package ($nsuri), $name);
+   Carp::croak "$name: invalid field-name"
+     if $option->{field_name_validation}
+       && $name =~ /$REG{ $option->{field_name_unsafe_rule} }/;
+   $value = $self->_parse_value ($name => $value, ns => $nsuri)
+     if $option->{parse} || $option->{parse_all};
+   $option->{parse} = 0;
+   (1, $name.':'.$nsuri => {name => $name, body => $value, ns => $nsuri});
  }
+ *_add_hash_check = \&_value_to_arrayitem;
+ *_replace_hash_check = \&_value_to_arrayitem;
  =head2 $self->relace ($field_name, $field_body)
-Line 456 
 first one is used and the others are not
+Line 525 
 first one is used and the others are not
  =cut
- sub replace ($%) {
+ sub _replace_hash_shift ($\%$\%) {
-   my $self = shift;
+   shift; my $r = shift;  my $n = $_[0]->{name} . ':' . $_[0]->{ns};
-   my %params = @_;
+   if ($$r{$n}) {
-   my %option = %{$self->{option}};
+     my $d = $$r{$n};
-   $option{parse} = defined wantarray unless defined $option{parse};
+     delete $$r{$n};
-   for (grep {/^-/} keys %params) {$option{substr ($_, 1)} = $params{$_}}
+     return $d;
-   my (%new_field);
-   for (grep {/^[^-]/} keys %params) {
-     my $name = lc $_;
-     $name =~ tr/_/-/ if $option{translate_underscore};
-     Carp::croak "replace: $name: invalid field-name"
-       if $option{validate} && $name =~ /$REG{UNSAFE_field_name}/;
-     $params{$_} = $self->_field_body ($params{$_}, $name) if $option{parse};
-     $new_field{$name} = $params{$_};
-   }
-   my $body = (%new_field)[-1];
-   for my $field (@{$self->{field}}) {
-     if (defined $new_field{$field->{name}}) {
-       $field->{body} = $new_field {$field->{name}};
-       $new_field{$field->{name}} = undef;
-     }
    }
-   for (keys %new_field) {
+   undef;
-     push @{$self->{field}}, {name => $_, body => $new_field{$_}};
-   }
-   $body if $option{parse};
  }
  =head2 $self->delete ($field-name, [$name, ...])
-Line 490 
 Deletes C<field> named as $field_name.
+Line 541 
 Deletes C<field> named as $field_name.
  =cut
- sub delete ($@) {
-   my $self = shift;
-   my %delete;  for (@_) {$delete{lc $_} = 1}
-   for my $field (@{$self->{field}}) {
-     undef $field if $delete{$field->{name}};
-   }
- }
  =head2 $self->count ([$field_name])
-Line 506 
 of fields.  (Same as $#$self+1)
+Line 550 
 of fields.  (Same as $#$self+1)
  =cut
- sub count ($;$) {
+ sub _count_by_name ($$\%) {
    my $self = shift;
-   my ($name) = (lc shift);
+   my ($array, $option) = @_;
-   unless ($name) {
+   my $name = $self->_n11n_field_name ($$option{-name});
-     $self->_delete_empty_field ();
+   my @a = grep {$_->{name} eq $name} @{$self->{$array}};
-     return $#{$self->{field}}+1;
+   $#a + 1;
-   }
+ }
-   my $count = 0;
-   for my $field (@{$self->{field}}) {
+ ## Delete empty items
-     if ($field->{name} eq $name) {
+ sub _delete_empty ($) {
-       $count++;
+   my $self = shift;
-     }
+   my $array = $self->{option}->{_HASH_NAME};
-   }
+   $self->{$array} = [grep {ref $_ && length $_->{name}} @{$self->{$array}}];
-   $count;
  }
  =head2 $self->rename ($field-name, $new-name, [$old, $new,...])
-Line 535 
 sub rename ($%) {
+Line 578 
 sub rename ($%) {
    for (grep {/^-/} keys %params) {$option{substr ($_, 1)} = $params{$_}}
    my %new_name;
    for (grep {/^[^-]/} keys %params) {
-     my ($old => $new) = (lc $_ => lc $params{$_});
+     my ($old => $new)
+       = ($self->_n11n_field_name ($_) => $self->_n11n_field_name ($params{$_}));
+     $old =~ tr/_/-/ if $option{translate_underscore};
      $new =~ tr/_/-/ if $option{translate_underscore};
      Carp::croak "rename: $new: invalid field-name"
-       if $option{validate} && $new =~ /$REG{UNSAFE_field_name}/;
+       if $option{field_name_validation}
+         && $new =~ /$REG{$option{field_name_unsafe_rule}}/;
      $new_name{$old} = $new;
    }
-   for my $field (@{$self->{field}}) {
+   for my $field (@{$self->{value}}) {
      if (length $new_name{$field->{name}}) {
        $field->{name} = $new_name{$field->{name}};
      }
-Line 559 
 for each value.
+Line 605 
 for each value.
  =cut
- sub scan ($&) {
+ sub _scan_sort ($\@\%) {
-   my ($self, $sub) = @_;
+   no strict 'refs';
-   my $sort;
+   my $self = shift;
-   $sort = \&_header_cmp if $self->{option}->{sort} eq 'good-practice';
+   my ($array, $option) = @_;
-   $sort = {$a cmp $b} if $self->{option}->{sort} eq 'alphabetic';
+   my $nspack = &_NS_uri2package ($self->{option}->{ns_default_phuri});
-   my @field = @{$self->{field}};
+   my $sort = ${ $nspack.'::OPTION' }{field_sort};
-   if (ref $sort) {
+   if ($option->{field_sort} eq 'good-practice' && $sort->{'good-practice'}) {
-     @field = sort $sort @{$self->{field}};
+     return $self->Message::Header::Default::sort_good_practice ($array, $nspack, $option);
-   }
+   } elsif ($option->{field_sort} eq 'alphabetic' && $sort->{'alphabetic'}) {
-   for my $field (@field) {
+     ## TODO: How treat namespace prefix?
-     next if $field->{name} =~ /^_/;
+     return sort {$a->{name} cmp $b->{name}} @$array;
-     &$sub($field->{name} => $field->{body});
+   }
-   }
+   @$array;
+ }
+ sub _n11n_field_name ($$) {
+   no strict 'refs';
+   my $self = shift;
+   my $s = shift;
+   $s =~ s/^$REG{WSP}+//; $s =~ s/$REG{WSP}+$//;
+   $s = lc $s unless ${&_NS_uri2package ($self->{option}->{ns_default_phuri}).'::OPTION'}{case_sensible};
+   $s;
  }
- # Compare function which makes it easy to sort headers in the
- # recommended "Good Practice" order.
- ## taken from HTTP::Header
- sub _header_cmp
- {
-   my ($na, $nb) = ($a->{name}, $b->{name});
-     # Unknown headers are assign a large value so that they are
-     # sorted last.  This also helps avoiding a warning from -w
-     # about comparing undefined values.
-     $header_order{$na} = 999 unless defined $header_order{$na};
-     $header_order{$nb} = 999 unless defined $header_order{$nb};
-     $header_order{$na} <=> $header_order{$nb} || $na cmp $nb;
- }
  =head2 $self->stringify ([%option])
-Line 599 
 sub stringify ($;%) {
+Line 640 
 sub stringify ($;%) {
    my $self = shift;
    my %params = @_;
    my %option = %{$self->{option}};
+   $option{format} = $params{-format} if $params{-format};
+   $self->_init_by_format ($option{format}, \%option)
+     if $self->{option}->{format} ne $option{format};
    for (grep {/^-/} keys %params) {$option{substr ($_, 1)} = $params{$_}}
+   ## Fill required fields
+     my %exist;
+     for ($self->field_name_list) {$exist{$_} = 1}
+     &{ $option{hook_stringify_fill_fields} } ($self, \%exist, \%option);
    my @ret;
-   if ($option{mail_from}) {
+   ## RFC 2774 numerical field name prefix
-     my $fromline = $self->field ('mail-from');
+   my %nprefix;
-     push @ret, 'From '.$fromline if $fromline;
+   {no strict 'refs';
-   }
+     %nprefix = reverse %{ $self->{ns}->{number2uri} };
-   $self->scan (sub {
+     my $i = (sort { $a <=> $b } keys %{ $self->{ns}->{number2uri} })[-1] + 1;
-     my ($name, $body) = (@_);
+     $i = 10 if $i < 10;
-     return unless length $name;
+     my $hprefix = ${ &_NS_uri2package
-     return if $option{mail_from} && $name eq 'mail-from';
+                        ($self->{ns}->{phname2uri}->{'x-http'})
-     return if !$option{output_bcc} && ($name eq 'bcc' || $name eq 'resent-bcc');
+                        .'::OPTION' } {namespace_phname_goodcase};
-     my $fbody;
+     for my $uri (keys %nprefix) {
-     if (ref $body) {
+       if ($nprefix{ $uri } < 10) {
-       $fbody = $body->stringify (-format => $option{format});
+         $nprefix{ $uri } = $i++;
-     } else {
+       }
-       $fbody = $body;
+       my $nsfs = $self->item ($uri, -by => 'http-ns-define');
+       for my $i (0..$nsfs->count-1) {
+         my $nsf = ($nsfs->value ($i))[0];
+         if ($nsf->value eq $uri) {
+           $nsf->replace (ns => $nprefix{ $uri });
+           $nprefix{ $uri } = $hprefix . '-' . $nprefix{ $uri };
+           last;
+         }
+       }
      }
-     return unless length $fbody;
+   }
-     $fbody =~ s/\x0D(?=[^\x09\x0A\x20])/\x0D\x20/g;
+   my $_stringify = sub {
-     $fbody =~ s/\x0A(?=[^\x09\x20])/\x0A\x20/g;
+     no strict 'refs';
-     $name =~ s/((?:^|-)[a-z])/uc($1)/ge if $option{capitalize};
+       my ($name, $body, $nsuri) = ($_[1]->{name}, $_[1]->{body}, $_[1]->{ns});
-     $fbody = $self->_fold ($fbody) if $self->{option}->{fold};
+       return unless length $name;
-     push @ret, sprintf $self->{option}->{field_format_pattern}, $name, $fbody;
+       return if $option{output_mail_from} && $name eq 'mail-from';
-   });
+       $body = '' if !$option{output_bcc} && $name eq 'bcc';
-   my $ret = join ("\n", @ret);
+       my $nspackage = &_NS_uri2package ($nsuri);
-   $ret? $ret."\n": '';
+       my $oname;        ## Outputed field-name
+       my $prefix = $nprefix{ $nsuri }
+                 || ${$nspackage.'::OPTION'} {namespace_phname_goodcase}
+                 || $self->{ns}->{uri2phname}->{ $nsuri };
+       my $default_prefix = ${ &_NS_uri2package ($option{ns_default_phuri})
+                               .'::OPTION'} {namespace_phname_goodcase};
+       $prefix = '' if $prefix eq $default_prefix;
+       $prefix =~ s/^\Q$default_prefix\E-//;
+       my $gc = ${$nspackage.'::OPTION'} {to_be_goodcase};
+       if (ref $gc) { $oname = &$gc ($self, $nspackage, $name, \%option) }
+       else { $oname = $name }
+       if ($prefix) { $oname = $prefix . '-' . $oname }
+       if ($option{format} =~ /uri-url-mailto/) {
+         return if (( ${$nspackage.'::OPTION'} {uri_mailto_safe}->{$name}
+                   || ${$nspackage.'::OPTION'} {uri_mailto_safe}->{':default'})
+                   < $option{uri_mailto_safe_level});
+         if ($name eq 'to') {
+           $body = $self->field ('to', -new_item_unless_exist => 0);
+           if (ref $body && $body->have_group) {
+             #
+           } elsif (ref $body && $body->count > 1) {
+             $body = $body->clone;
+             $body->delete ({-by => 'index'}, 0);
+           }
+         }
+       }
+       my $fbody;
+       if (ref $body) {
+         $fbody = $body->stringify (-format => $option{format});
+       } else {
+         $fbody = $body;
+       }
+       unless (${$nspackage.'::OPTION'} {field}->{$name}->{empty_body}) {
+         return unless length $fbody;
+       }
+       unless ($option{linebreak_strict}) {
+         ## bare \x0D and bare \x0A are unsafe
+         $fbody =~ s/\x0D(?=[^\x09\x0A\x20])/\x0D\x20/g;
+         $fbody =~ s/\x0A(?=[^\x09\x20])/\x0A\x20/g;
+       } else {
+         $fbody =~ s/\x0D\x0A(?=[^\x09\x20])/\x0D\x0A\x20/g;
+       }
+       if ($option{use_folding}) {
+         if (ref $option{output_folding}) {
+           $fbody = &{$option{output_folding}} ($self, $fbody,
+             -initial_length => length ($oname) +2);
+         } elsif ($option{output_folding}) {
+           $fbody = $self->_fold ($fbody, -initial_length => length ($oname) +2);
+         }
+       }
+       push @ret, sprintf $option{field_format_pattern}, $oname, $fbody;
+     };
+   if ($option{format} =~ /uri-url-mailto/) {
+     if ($option{format} =~ /uri-url-mailto-to/) {
+       my $to = $self->field ('to', -new_item_unless_exist => 0);
+       if ($to) {
+         unless ($to->have_group) {
+           my $fbody = $to->stringify (-format => $option{format}, -max => 1);
+           return &{$option{output_folding}} ($self, $fbody);
+         }
+       }
+       '';
+     } elsif ($option{format} =~ /uri-url-mailto-rfc1738/) {
+       my $to = $self->field ('to', -new_item_unless_exist => 0);
+       if ($to) {
+         my $fbody = $to->addr_spec (-format => $option{format});
+         return &{$option{output_folding}} ($self, $fbody);
+       }
+       '';
+     } else {
+       $self->scan ($_stringify);
+       my $ret = join ('&', @ret);
+       $ret;
+     }
+   } else {
+     if ($option{output_mail_from}) {
+       my $fromline = $self->field ('mail-from', -new_item_unless_exist => 0);
+       push @ret, 'From '.$fromline if $fromline;
+     }
+     $self->scan ($_stringify);
+     my $ret = join ("\x0D\x0A", @ret);
+     $ret? $ret."\x0D\x0A": '';
+   }
  }
  *as_string = \&stringify;
-Line 640 
 sub option ($@) {
+Line 778 
 sub option ($@) {
      return $self->{option}->{ shift (@_) };
    }
    while (my ($name, $value) = splice (@_, 0, 2)) {
-     $name =~ s/^-//;
      $self->{option}->{$name} = $value;
      if ($name eq 'format') {
        for my $f (@{$self->{field}}) {
-Line 652 
 sub option ($@) {
+Line 789 
 sub option ($@) {
    }
  }
- sub field_type ($$;$) {
+ sub field_type ($@) {shift->SUPER::value_type (@_)}
+ ## $self->_fold ($string, %option = (-max, -initial_length(for field-name)) )
+ sub _fold ($$;%) {
    my $self = shift;
-   my $field_name = shift;
+   my $string = shift;
-   my $new_field_type = shift;
+   my %option = @_;
-   if ($new_field_type) {
+   my $max = $self->{option}->{line_length_max};
-     $self->{option}->{field_type}->{$field_name} = $new_field_type;
+   $max = 20 if $max < 20;
-   }
-   $self->{option}->{field_type}->{$field_name}
+   my $l = $option{-initial_length} || 0;
-   || $self->{option}->{field_type}->{':DEFAULT'};
+   $l += length $1 if $string =~ /^([^\x09\x20]+)/;
+   $string =~ s{([\x09\x20][^\x09\x20]+)}{
+     my $s = $1;
+     if (($l + length $s) > $max) {
+       $s = "\x0D\x0A\x20" . $s;
+       $l = 1 + length $s;
+     } else { $l += length $s }
+     $s;
+   }gex;
+   $string;
  }
- sub _delete_empty_field ($) {
+ sub _ns_load_ph ($$) {
    my $self = shift;
-   my @ret;
+   my $name = shift;     ## normalized prefix (without HYPHEN-MINUS)
-   for my $field (@{$self->{field}}) {
+   return if $self->{ns}->{phname2uri}->{$name};
-     push @ret, $field if $field->{name};
+   $self->{ns}->{phname2uri}->{$name} = $NS_phname2uri{$name};
-   }
+   $self->{ns}->{uri2phname}->{ $self->{ns}->{phname2uri}->{$name} } = $name;
-   $self->{field} = \@ret;
+ }
-   $self;
+ sub _ns_associate_numerical_prefix ($) {
+   my $self = shift;
+   $self->scan (sub {shift;
+     my $f = shift;  return unless $f->{name};
+     if ($f->{ns} eq $self->{ns}->{phname2uri}->{'x-http'}
+      || $f->{ns} eq $self->{ns}->{phname2uri}->{'x-http-c'}) {
+       my $fn = $f->{name};
+       if ($fn eq 'opt' || $fn eq 'man') {
+         $f->{body} = $self->_parse_value ($fn => $f->{body}, ns => $f->{ns});
+         for ($f->{body}->value (0..$f->{body}->count-1)) {
+           my ($nsuri, $number) = ($_->value, $_->item ('ns'));
+           if ($number && $nsuri) {
+             $self->{ns}->{number2uri}->{ $number } = $nsuri;
+           }
+         }
+       }
+     }
+   });
+   $self->scan (sub {shift;
+     my $f = shift;
+     if ($f->{ns} =~ /urn:x-suika-fam-cx:msgpm:header:x-temp:([0-9]+)$/ && $self->{ns}->{number2uri}->{ $1 }) {
+       $f->{ns} = $self->{ns}->{number2uri}->{ $1 };
+     }
+   });
  }
- sub _fold ($$;$) {
+ ## $package_name = Message::Header::_NS_uri2phpackage ($nsuri)
-   my $self = shift;
+ ## (For internal use of Message::* modules)
-   my $string = shift;
+ sub _NS_uri2phpackage ($) {
-   my $len = shift || $self->{option}->{fold_length};
+   $NS_uri2phpackage{$_[0]}
-   $len = 60 if $len < 60;
+   || $NS_uri2phpackage{$Message::Header::Default::OPTION{namespace_uri}};
+ }
-   ## This code is taken from Mail::Header 1.43 in MailTools,
+ sub _NS_uri2package ($) {
-   ## by Graham Barr (Maintained by Mark Overmeer <mailtools@overmeer.net>).
+   $NS_uri2package{$_[0]}
-   my $max = int($len - 5);         # 4 for leading spcs + 1 for [\,\;]
+   || $NS_uri2phpackage{$_[0]}
-   my $min = int($len * 4 / 5) - 4;
+   || $NS_uri2phpackage{$Message::Header::Default::OPTION{namespace_uri}};
-   my $ml = $len;
-   if (length($string) > $ml) {
-      #Split the line up
-      # first bias towards splitting at a , or a ; >4/5 along the line
-      # next split a whitespace
-      # else we are looking at a single word and probably don't want to split
-      my $x = "";
-      $x .= "$1\n "
-        while($string =~ s/^$REG{WSP}*(
-                           [^"]{$min,$max}?[\,\;]
-                           |[^"]{1,$max}$REG{WSP}
-                           |[^\s"]*(?:"[^"]*"[^\s"]*)+$REG{WSP}
-                           |[^\s"]+$REG{WSP}
-                           )
-                         //x);
-      $x .= $string;
-      $string = $x;
-      $string =~ s/(\A$REG{WSP}+|$REG{WSP}+\Z)//sog;
-      $string =~ s/\s+\n/\n/sog;
-   }
-   $string;
  }
  =head2 $self->clone ()
-Line 713 
 Returns a copy of Message::Header object
+Line 864 
 Returns a copy of Message::Header object
  =cut
- sub clone ($) {
+ ## Inhreited
-   my $self = shift;
-   my $clone = new Message::Header;
-   for my $name (%{$self->{option}}) {
-     if (ref $self->{option}->{$name} eq 'HASH') {
-       $clone->{option}->{$name} = {%{$self->{option}->{$name}}};
-     } elsif (ref $self->{option}->{$name} eq 'ARRAY') {
-       $clone->{option}->{$name} = [@{$self->{option}->{$name}}];
-     } else {
-       $clone->{option}->{$name} = $self->{option}->{$name};
-     }
-   }
-   for (@{$self->{field}}) {
-     $clone->add ($_->{name}, scalar $_->{body});
-   }
-   $clone;
- }
  =head1 NOTE

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