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# Copyright 2001,2002 Reliance Technology Consultants, Inc. |
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# This program is free software; you can redistribute it and/or modify |
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# it under the terms of the GNU General Public License as published by |
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# the Free Software Foundation; either version 2 of the License, or |
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# (at your option) any later version. |
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# |
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# This program is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with this program; if not, write to the Free Software |
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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package XML::Ximple; |
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use XML::Parser; |
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use strict; |
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use warnings; |
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require Exporter; |
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our @ISA = qw(Exporter); |
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our @EXPORT_OK = qw( |
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parse_xml_file |
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parse_xml |
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get_root_tag |
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ximple_to_string |
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); |
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our $VERSION = '1.02'; |
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=head1 NAME |
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XML::Ximple - XML in Perl |
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=head1 DESCRIPTION |
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XiMpLe is a simple XML parser created to provide |
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a tree based XML parser with a more desirable |
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data structure than what was currently availible |
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on CPAN. |
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=head1 SYNOPSIS |
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use XML::Ximple (qw( parse_xml_file |
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parse_xml |
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get_root_tag |
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ximple_to_string )); |
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$ximple_tree = parse_xml_file ( $filename ); |
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$ximple_tree = parse_xml ( $string ); |
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$ximple_tag = get_root_tag ( $ximple_tree ); |
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$string = ximple_to_string ( $ximple_tree ); |
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=head1 DATA |
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::= [ ... ] |
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::= { tag_name => , |
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attrib => |
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content => |
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tag_type => } |
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::= |
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::= { => String, ... } |
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::= PI | XMLDecl | DOCTYPE | Comment | undef |
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=head1 FUNCTIONS |
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=head2 parse_xml_file |
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Given a filename, parse the file as XML and return a Ximple tree. |
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=head2 parse_xml |
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Given a string, parse it as XML and return a Ximple tree. |
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=head2 get_root_tag |
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Given a Ximple tree, return the root element as a Ximple leaf. |
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=head2 ximple_to_string |
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Given a Ximple tree, return XML as a string. This will format the output XML |
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differently than the input. |
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=head1 EXAMPLE |
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use XML::Ximple (qw(parse_xml get_root_tag ximple_to_string)); |
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my $xt = parse_xml(<>); |
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print "This looks like a "; |
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print get_root_tag($xt)->{tag_name}; |
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print " type of document.\n"; |
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print '-'x80; |
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print ximple_to_string($xt); |
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=head1 SEE ALSO |
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=over |
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=item L |
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=item L |
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=item L |
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=item L |
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=back |
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=head1 SUPPORT |
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=over |
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=item Mailing list |
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=item Web site |
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=back |
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=head1 AUTHOR |
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Reliance Technology Consultants, Inc. |
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Mike MacHenry |
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Mike Burns |
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=cut |
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# $ximple_tree = { |
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# tag_name => "unicycle" |
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# attrib => { color => "chrom", |
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# height => 3, |
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# brand => "foo"} |
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# content => ["The content of a ximple tree\n", |
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# "is heterogenious just like xml", |
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# "itself. For example this is how\n", |
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# "i would make the word", |
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# { |
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# tag_name=>"bold", |
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# attrib=>{}, |
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# content=>["cheese"] |
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# }, |
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# "appear in a bold tag"] |
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# } |
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# |
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# The content of a ximple tree |
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# is heterogenius just like xml itself. For example this is how |
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# i would make the wordcheese appear in a bold tag |
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# |
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# |
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#if you need more explaination then parse an xml file and |
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#use Data::Dumper to view the result. |
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#there is an optional hash key "tag_type" which is nonexistant |
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#for normal tags, "PI" for processing instructions, "XMLDecl", |
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#for XML declaration tags, "DOCTYPE" for doc type tags and "empty" |
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#for empty tags. |
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my @tree; |
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my $p = new XML::Parser ( |
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Namespaces=>"1", |
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Handlers=>{ |
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Start => \&SetStartElementHandler, |
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End => \&SetEndElementHandler, |
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Char => \&SetCharacterDataHandler, |
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Proc => \&SetProcessingInstructionHandler, |
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Comment => \&SetCommentHandler, |
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CdataStart => \&SetStartCdataHandler, |
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CdataEnd => \&SetEndCdataHandler, |
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Default => \&SetDefaultHandler, |
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Unparsed => \&SetUnparsedEntityDeclHandler, |
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Notation => \&SetNotationDeclHandler, |
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ExternEnt => \&SetExternalEntityRefHandler, |
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ExternEntFin => \&SetExtEntFinishHandler, |
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Entity => \&SetEntityDeclHandler, |
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Element => \&SetElementDeclHandler, |
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Attlist => \&SetAttListDeclHandler, |
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Doctype => \&SetDoctypeHandler, |
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DoctypeFin => \&SetEndDoctypeHandler, |
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XMLDecl => \&SetXMLDeclHandler |
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} |
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); |
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###################################################################### |
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##parse_xml |
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###################################################################### |
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sub SetStartElementHandler { |
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my ($expat,$element,%attrib) = @_; |
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push @tree , {tag_name=>$element,attrib=>\%attrib,content=>[]}; |
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} |
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sub SetEndElementHandler { |
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my ($expat,$element) = @_; |
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my $tag = pop @tree; |
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$tag->{tag_type} = "empty" if (scalar (@{$tag->{content}}) == 0); |
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push @{$tree[-1]->{content}} , $tag; |
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} |
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sub SetCharacterDataHandler { |
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my ($expat,$string) = @_; |
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push @{$tree[-1]->{content}}, $string; |
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} |
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sub SetProcessingInstructionHandler { |
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my ($expat,$target,$data) = @_; |
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push (@{$tree[-1]->{content}},{ |
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tag_name=>$target, |
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tag_type=>"PI", |
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data=>$data |
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}); |
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} |
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sub SetCommentHandler { |
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my ($expat,$data) = @_; |
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push (@{$tree[-1]->{content}},{ |
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tag_type => "Comment", |
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data => $data |
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}); |
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} |
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sub SetStartCdataHandler { |
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#intentionally skipped |
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#doing so escapes all meta charecters in the block |
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} |
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sub SetEndCdataHandler { |
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#intentionally skipped |
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} |
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#the following handlers are left unimplimented due to lack of demand. |
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sub SetDefaultHandler {} |
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sub SetUnparsedEntityDeclHandler {} |
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sub SetNotationDeclHandler {} |
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sub SetExternalEntityRefHandler {} |
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sub SetExtEntFinishHandler {} |
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sub SetEntityDeclHandler {} |
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sub SetElementDeclHandler {} |
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sub SetAttListDeclHandler {} |
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247
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sub SetDoctypeHandler { |
248
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my ($expat,$name,$sysid,$pupid,$internal) = @_; |
249
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push (@{$tree[-1]->{content}},{ |
250
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tag_name=>"DOCTYPE", |
251
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tag_type=>"DOCTYPE", |
252
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attrib=>{ |
253
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name=>$name, |
254
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sysid=>$sysid, |
255
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pupid=>$pupid, |
256
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internal=>$internal |
257
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} |
258
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}); |
259
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} |
260
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261
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sub SetEndDoctypeHandler { |
262
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#we now have the DTD. we can set ourselves up for |
263
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#more wellformedness checking here for the rest of the document |
264
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} |
265
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266
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sub SetXMLDeclHandler { |
267
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my ($expat,$version,$encoding,$standalone) = @_; |
268
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push (@{$tree[-1]->{content}},{ |
269
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tag_name=>"xml", |
270
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tag_type=>"XMLDecl", |
271
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attrib=> { |
272
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version=>$version, |
273
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encoding=>$encoding||"UTF-8", |
274
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standalone=>$standalone||"no", |
275
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} |
276
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}); |
277
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} |
278
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279
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sub parse_xml_file { |
280
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@tree = ({content=>[]}); |
281
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eval { local $SIG{'__DIE__'}; $p->parsefile(shift)};; |
282
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if ($@) { |
283
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#warn $@; |
284
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return; |
285
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} else { |
286
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return $tree[0]->{content}; |
287
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} |
288
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} |
289
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290
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sub parse_xml { |
291
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|
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|
@tree = ({content=>[]}); |
292
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|
eval { local $SIG{'__DIE__'}; $p->parse(shift)};; |
293
|
|
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|
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|
if ($@) { |
294
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|
#warn $@; |
295
|
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|
return; |
296
|
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|
} else { |
297
|
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|
return $tree[0]->{content}; |
298
|
|
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|
} |
299
|
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|
} |
300
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301
|
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###################################################################### |
302
|
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|
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|
|
## ximple_to_string |
303
|
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|
|
###################################################################### |
304
|
|
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|
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305
|
|
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|
|
|
|
## ximple_to_string: Ximple_tree Number -> String |
306
|
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|
|
|
|
## Given a Ximple tree, return a string that is the XML equivalent. |
307
|
|
|
|
|
|
|
sub ximple_to_string { |
308
|
|
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|
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|
|
my ($tree,$depth) = @_; |
309
|
|
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|
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|
|
$depth ||= 0; ## Depth? Hm? |
310
|
|
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|
|
|
|
my $xml = ""; |
311
|
|
|
|
|
|
|
foreach my $next (@$tree) { |
312
|
|
|
|
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|
|
if (ref ($next) eq 'HASH') { |
313
|
|
|
|
|
|
|
if (not defined $next->{tag_type}) { |
314
|
|
|
|
|
|
|
$xml .= open_tag_to_string($next,$depth); |
315
|
|
|
|
|
|
|
$xml .= ximple_to_string($next->{content},$depth+1); |
316
|
|
|
|
|
|
|
$xml .= close_tag_to_string ($next,$depth); |
317
|
|
|
|
|
|
|
} elsif ($next->{tag_type} eq 'empty') { |
318
|
|
|
|
|
|
|
$xml .= empty_tag_to_string($next,$depth); |
319
|
|
|
|
|
|
|
} elsif ($next->{tag_type} eq 'DOCTYPE') { |
320
|
|
|
|
|
|
|
$xml .= doctype_to_string($next,$depth); |
321
|
|
|
|
|
|
|
} elsif ($next->{tag_type} eq 'XMLDecl') { |
322
|
|
|
|
|
|
|
$xml .= xmldecl_to_string($next,$depth); |
323
|
|
|
|
|
|
|
} elsif ($next->{tag_type} eq 'PI') { |
324
|
|
|
|
|
|
|
$xml .= pi_to_string($next,$depth); |
325
|
|
|
|
|
|
|
} elsif ($next->{tag_type} eq 'Comment') { |
326
|
|
|
|
|
|
|
$xml .= comment_to_string($next,$depth); |
327
|
|
|
|
|
|
|
} else { |
328
|
|
|
|
|
|
|
die "unsupported tag_type: $next->{tag_type}"; |
329
|
|
|
|
|
|
|
} |
330
|
|
|
|
|
|
|
} elsif ($next) { |
331
|
|
|
|
|
|
|
$xml .= xmlize($next); |
332
|
|
|
|
|
|
|
} |
333
|
|
|
|
|
|
|
} |
334
|
|
|
|
|
|
|
return $xml; |
335
|
|
|
|
|
|
|
} |
336
|
|
|
|
|
|
|
|
337
|
|
|
|
|
|
|
## open_tag_to_string: Tag Number -> String |
338
|
|
|
|
|
|
|
## Given an open tag, return the XML equivalent. |
339
|
|
|
|
|
|
|
sub open_tag_to_string { |
340
|
|
|
|
|
|
|
my ($tag,$depth) = @_; |
341
|
|
|
|
|
|
|
return |
342
|
|
|
|
|
|
|
"<".$tag->{tag_name}. |
343
|
|
|
|
|
|
|
attrib_to_string ($tag->{attrib}). |
344
|
|
|
|
|
|
|
">"; |
345
|
|
|
|
|
|
|
} |
346
|
|
|
|
|
|
|
|
347
|
|
|
|
|
|
|
## close_tag_to_string: Tag Number -> String |
348
|
|
|
|
|
|
|
## the close tag for the ximple tree |
349
|
|
|
|
|
|
|
sub close_tag_to_string { |
350
|
|
|
|
|
|
|
my ($tag,$depth) = @_; |
351
|
|
|
|
|
|
|
return "$tag->{tag_name}>\n"; |
352
|
|
|
|
|
|
|
} |
353
|
|
|
|
|
|
|
|
354
|
|
|
|
|
|
|
## empty_tag_to_string: Tag Number -> String |
355
|
|
|
|
|
|
|
sub empty_tag_to_string { |
356
|
|
|
|
|
|
|
my ($tag,$depth) = @_; |
357
|
|
|
|
|
|
|
return |
358
|
|
|
|
|
|
|
"<".$tag->{tag_name}. |
359
|
|
|
|
|
|
|
attrib_to_string ($tag->{attrib}). |
360
|
|
|
|
|
|
|
"/>\n"; |
361
|
|
|
|
|
|
|
} |
362
|
|
|
|
|
|
|
|
363
|
|
|
|
|
|
|
## doctype_to_string: Tag Number -> String |
364
|
|
|
|
|
|
|
sub doctype_to_string { |
365
|
|
|
|
|
|
|
my ($tag,$depth) = @_; |
366
|
|
|
|
|
|
|
my $xml = "{tag_name} $tag->{attrib}{name}"; |
367
|
|
|
|
|
|
|
if (defined $tag->{attrib}{pubid}) { |
368
|
|
|
|
|
|
|
$xml .= " PUBLIC \"".xmlize($tag->{attrib}{pubid})."\""; |
369
|
|
|
|
|
|
|
} elsif (defined $tag->{attrib}{sysid}) { |
370
|
|
|
|
|
|
|
$xml .= " SYSTEM \"".xmlize($tag->{attrib}{sysid})."\""; |
371
|
|
|
|
|
|
|
} else { |
372
|
|
|
|
|
|
|
die "no identifier in DOCTYPE"; |
373
|
|
|
|
|
|
|
} |
374
|
|
|
|
|
|
|
return $xml.">\n"; |
375
|
|
|
|
|
|
|
} |
376
|
|
|
|
|
|
|
|
377
|
|
|
|
|
|
|
## pi_to_string: Tag Number -> String |
378
|
|
|
|
|
|
|
sub pi_to_string { |
379
|
|
|
|
|
|
|
my ($tag,$depth) = @_; |
380
|
|
|
|
|
|
|
my $xml = "" . $tag->{tag_name}; |
381
|
|
|
|
|
|
|
if (defined $tag->{data}) { |
382
|
|
|
|
|
|
|
$xml .= xmlize ($tag->{data}); |
383
|
|
|
|
|
|
|
} |
384
|
|
|
|
|
|
|
return $xml."?>\n"; |
385
|
|
|
|
|
|
|
} |
386
|
|
|
|
|
|
|
|
387
|
|
|
|
|
|
|
## xmldecl_to_string: Tag Number -> String |
388
|
|
|
|
|
|
|
sub xmldecl_to_string { |
389
|
|
|
|
|
|
|
my ($tag,$depth) = @_; |
390
|
|
|
|
|
|
|
my $xml = "$tag->{tag_name}"; |
391
|
|
|
|
|
|
|
$xml .= ' version="'.xmlize($tag->{attrib}{version}).'"'; |
392
|
|
|
|
|
|
|
if (defined $tag->{attrib}{encoding}) { |
393
|
|
|
|
|
|
|
$xml .= ' encoding="'.xmlize($tag->{attrib}{encoding}).'"'; |
394
|
|
|
|
|
|
|
} |
395
|
|
|
|
|
|
|
if (defined $tag->{attrib}{standalone}) { |
396
|
|
|
|
|
|
|
$xml .= ' standalone="'.xmlize($tag->{attrib}{standalone}).'"'; |
397
|
|
|
|
|
|
|
} |
398
|
|
|
|
|
|
|
return $xml."?>\n"; |
399
|
|
|
|
|
|
|
} |
400
|
|
|
|
|
|
|
|
401
|
|
|
|
|
|
|
## comment_to_string: Tag Numer -> String |
402
|
|
|
|
|
|
|
sub comment_to_string { |
403
|
|
|
|
|
|
|
my ($tag,$depth) = @_; |
404
|
|
|
|
|
|
|
return ""; |
405
|
|
|
|
|
|
|
} |
406
|
|
|
|
|
|
|
|
407
|
|
|
|
|
|
|
## attrib_to_string: Tag -> String |
408
|
|
|
|
|
|
|
sub attrib_to_string { |
409
|
|
|
|
|
|
|
my $attrib = shift; |
410
|
|
|
|
|
|
|
my $xml = ""; |
411
|
|
|
|
|
|
|
foreach (keys %$attrib) { |
412
|
|
|
|
|
|
|
$xml .= " $_=\"".xmlize($attrib->{$_})."\""; |
413
|
|
|
|
|
|
|
} |
414
|
|
|
|
|
|
|
return $xml; |
415
|
|
|
|
|
|
|
} |
416
|
|
|
|
|
|
|
|
417
|
|
|
|
|
|
|
sub xmlize { |
418
|
|
|
|
|
|
|
my $text = shift; |
419
|
|
|
|
|
|
|
return "" unless defined $text; #dskippy 2002/02/28 why are functions passing undef to this? |
420
|
|
|
|
|
|
|
$text =~ s/&/&/g; |
421
|
|
|
|
|
|
|
$text =~ s/</g; |
422
|
|
|
|
|
|
|
$text =~ s/>/>/g; |
423
|
|
|
|
|
|
|
$text =~ s/"/"/g; |
424
|
|
|
|
|
|
|
return $text; |
425
|
|
|
|
|
|
|
} |
426
|
|
|
|
|
|
|
|
427
|
|
|
|
|
|
|
###################################################################### |
428
|
|
|
|
|
|
|
##ximple_print |
429
|
|
|
|
|
|
|
###################################################################### |
430
|
|
|
|
|
|
|
sub ximple_print { |
431
|
|
|
|
|
|
|
my ($ximple_tree) = @_; |
432
|
|
|
|
|
|
|
print ximple_to_string ($ximple_tree,0); |
433
|
|
|
|
|
|
|
} |
434
|
|
|
|
|
|
|
|
435
|
|
|
|
|
|
|
###################################################################### |
436
|
|
|
|
|
|
|
##Accessors |
437
|
|
|
|
|
|
|
###################################################################### |
438
|
|
|
|
|
|
|
sub get_root_tag { |
439
|
|
|
|
|
|
|
my ($ximple_tree) = @_; |
440
|
|
|
|
|
|
|
foreach (@$ximple_tree) { |
441
|
|
|
|
|
|
|
next unless ref; |
442
|
|
|
|
|
|
|
return $_ unless ($_->{tag_type}); |
443
|
|
|
|
|
|
|
} |
444
|
|
|
|
|
|
|
return; |
445
|
|
|
|
|
|
|
} |
446
|
|
|
|
|
|
|
1; |