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Your IP : 18.119.135.231
# $Id$
package XML::SAX::PurePerl;
use strict;
use XML::SAX::PurePerl::Productions qw($SingleChar);
sub elementdecl {
my ($self, $reader) = @_;
my $data = $reader->data(9);
return 0 unless $data =~ /^<!ELEMENT/;
$reader->move_along(9);
$self->skip_whitespace($reader) ||
$self->parser_error("No whitespace after ELEMENT declaration", $reader);
my $name = $self->Name($reader);
$self->skip_whitespace($reader) ||
$self->parser_error("No whitespace after ELEMENT's name", $reader);
$self->contentspec($reader, $name);
$self->skip_whitespace($reader);
$reader->match('>') or $self->parser_error("Closing angle bracket not found on ELEMENT declaration", $reader);
return 1;
}
sub contentspec {
my ($self, $reader, $name) = @_;
my $data = $reader->data(5);
my $model;
if ($data =~ /^EMPTY/) {
$reader->move_along(5);
$model = 'EMPTY';
}
elsif ($data =~ /^ANY/) {
$reader->move_along(3);
$model = 'ANY';
}
else {
$model = $self->Mixed_or_children($reader);
}
if ($model) {
# call SAX callback now.
$self->element_decl({Name => $name, Model => $model});
return 1;
}
$self->parser_error("contentspec not found in ELEMENT declaration", $reader);
}
sub Mixed_or_children {
my ($self, $reader) = @_;
my $data = $reader->data(8);
$data =~ /^\(/ or return; # $self->parser_error("No opening bracket in Mixed or children", $reader);
if ($data =~ /^\(\s*\#PCDATA/) {
$reader->match('(');
$self->skip_whitespace($reader);
$reader->move_along(7);
my $model = $self->Mixed($reader);
return $model;
}
# not matched - must be Children
return $self->children($reader);
}
# Mixed ::= ( '(' S* PCDATA ( S* '|' S* QName )* S* ')' '*' )
# | ( '(' S* PCDATA S* ')' )
sub Mixed {
my ($self, $reader) = @_;
# Mixed_or_children already matched '(' S* '#PCDATA'
my $model = '(#PCDATA';
$self->skip_whitespace($reader);
my %seen;
while (1) {
last unless $reader->match('|');
$self->skip_whitespace($reader);
my $name = $self->Name($reader) ||
$self->parser_error("No 'Name' after Mixed content '|'", $reader);
if ($seen{$name}) {
$self->parser_error("Element '$name' has already appeared in this group", $reader);
}
$seen{$name}++;
$model .= "|$name";
$self->skip_whitespace($reader);
}
$reader->match(')') || $self->parser_error("no closing bracket on mixed content", $reader);
$model .= ")";
if ($reader->match('*')) {
$model .= "*";
}
return $model;
}
# [[47]] Children ::= ChoiceOrSeq Cardinality?
# [[48]] Cp ::= ( QName | ChoiceOrSeq ) Cardinality?
# ChoiceOrSeq ::= '(' S* Cp ( Choice | Seq )? S* ')'
# [[49]] Choice ::= ( S* '|' S* Cp )+
# [[50]] Seq ::= ( S* ',' S* Cp )+
# // Children ::= (Choice | Seq) Cardinality?
# // Cp ::= ( QName | Choice | Seq) Cardinality?
# // Choice ::= '(' S* Cp ( S* '|' S* Cp )+ S* ')'
# // Seq ::= '(' S* Cp ( S* ',' S* Cp )* S* ')'
# [[51]] Mixed ::= ( '(' S* PCDATA ( S* '|' S* QName )* S* ')' MixedCardinality )
# | ( '(' S* PCDATA S* ')' )
# Cardinality ::= '?' | '+' | '*'
# MixedCardinality ::= '*'
sub children {
my ($self, $reader) = @_;
return $self->ChoiceOrSeq($reader) . $self->Cardinality($reader);
}
sub ChoiceOrSeq {
my ($self, $reader) = @_;
$reader->match('(') or $self->parser_error("choice/seq contains no opening bracket", $reader);
my $model = '(';
$self->skip_whitespace($reader);
$model .= $self->Cp($reader);
if (my $choice = $self->Choice($reader)) {
$model .= $choice;
}
else {
$model .= $self->Seq($reader);
}
$self->skip_whitespace($reader);
$reader->match(')') or $self->parser_error("choice/seq contains no closing bracket", $reader);
$model .= ')';
return $model;
}
sub Cardinality {
my ($self, $reader) = @_;
# cardinality is always optional
my $data = $reader->data;
if ($data =~ /^([\?\+\*])/) {
$reader->move_along(1);
return $1;
}
return '';
}
sub Cp {
my ($self, $reader) = @_;
my $model;
my $name = eval
{
if (my $name = $self->Name($reader)) {
return $name . $self->Cardinality($reader);
}
};
return $name if defined $name;
return $self->ChoiceOrSeq($reader) . $self->Cardinality($reader);
}
sub Choice {
my ($self, $reader) = @_;
my $model = '';
$self->skip_whitespace($reader);
while ($reader->match('|')) {
$self->skip_whitespace($reader);
$model .= '|';
$model .= $self->Cp($reader);
$self->skip_whitespace($reader);
}
return $model;
}
sub Seq {
my ($self, $reader) = @_;
my $model = '';
$self->skip_whitespace($reader);
while ($reader->match(',')) {
$self->skip_whitespace($reader);
my $cp = $self->Cp($reader);
if ($cp) {
$model .= ',';
$model .= $cp;
}
$self->skip_whitespace($reader);
}
return $model;
}
sub AttlistDecl {
my ($self, $reader) = @_;
my $data = $reader->data(9);
if ($data =~ /^<!ATTLIST/) {
# It's an attlist
$reader->move_along(9);
$self->skip_whitespace($reader) ||
$self->parser_error("No whitespace after ATTLIST declaration", $reader);
my $name = $self->Name($reader);
$self->AttDefList($reader, $name);
$self->skip_whitespace($reader);
$reader->match('>') or $self->parser_error("Closing angle bracket not found on ATTLIST declaration", $reader);
return 1;
}
return 0;
}
sub AttDefList {
my ($self, $reader, $name) = @_;
1 while $self->AttDef($reader, $name);
}
sub AttDef {
my ($self, $reader, $el_name) = @_;
$self->skip_whitespace($reader) || return 0;
my $att_name = $self->Name($reader) || return 0;
$self->skip_whitespace($reader) ||
$self->parser_error("No whitespace after Name in attribute definition", $reader);
my $att_type = $self->AttType($reader);
$self->skip_whitespace($reader) ||
$self->parser_error("No whitespace after AttType in attribute definition", $reader);
my ($mode, $value) = $self->DefaultDecl($reader);
# fire SAX event here!
$self->attribute_decl({
eName => $el_name,
aName => $att_name,
Type => $att_type,
Mode => $mode,
Value => $value,
});
return 1;
}
sub AttType {
my ($self, $reader) = @_;
return $self->StringType($reader) ||
$self->TokenizedType($reader) ||
$self->EnumeratedType($reader) ||
$self->parser_error("Can't match AttType", $reader);
}
sub StringType {
my ($self, $reader) = @_;
my $data = $reader->data(5);
return unless $data =~ /^CDATA/;
$reader->move_along(5);
return 'CDATA';
}
sub TokenizedType {
my ($self, $reader) = @_;
my $data = $reader->data(8);
if ($data =~ /^(IDREFS?|ID|ENTITIES|ENTITY|NMTOKENS?)/) {
$reader->move_along(length($1));
return $1;
}
return;
}
sub EnumeratedType {
my ($self, $reader) = @_;
return $self->NotationType($reader) || $self->Enumeration($reader);
}
sub NotationType {
my ($self, $reader) = @_;
my $data = $reader->data(8);
return unless $data =~ /^NOTATION/;
$reader->move_along(8);
$self->skip_whitespace($reader) ||
$self->parser_error("No whitespace after NOTATION", $reader);
$reader->match('(') or $self->parser_error("No opening bracket in notation section", $reader);
$self->skip_whitespace($reader);
my $model = 'NOTATION (';
my $name = $self->Name($reader) ||
$self->parser_error("No name in notation section", $reader);
$model .= $name;
$self->skip_whitespace($reader);
$data = $reader->data;
while ($data =~ /^\|/) {
$reader->move_along(1);
$model .= '|';
$self->skip_whitespace($reader);
my $name = $self->Name($reader) ||
$self->parser_error("No name in notation section", $reader);
$model .= $name;
$self->skip_whitespace($reader);
$data = $reader->data;
}
$data =~ /^\)/ or $self->parser_error("No closing bracket in notation section", $reader);
$reader->move_along(1);
$model .= ')';
return $model;
}
sub Enumeration {
my ($self, $reader) = @_;
return unless $reader->match('(');
$self->skip_whitespace($reader);
my $model = '(';
my $nmtoken = $self->Nmtoken($reader) ||
$self->parser_error("No Nmtoken in enumerated declaration", $reader);
$model .= $nmtoken;
$self->skip_whitespace($reader);
my $data = $reader->data;
while ($data =~ /^\|/) {
$model .= '|';
$reader->move_along(1);
$self->skip_whitespace($reader);
my $nmtoken = $self->Nmtoken($reader) ||
$self->parser_error("No Nmtoken in enumerated declaration", $reader);
$model .= $nmtoken;
$self->skip_whitespace($reader);
$data = $reader->data;
}
$data =~ /^\)/ or $self->parser_error("No closing bracket in enumerated declaration", $reader);
$reader->move_along(1);
$model .= ')';
return $model;
}
sub Nmtoken {
my ($self, $reader) = @_;
return $self->Name($reader);
}
sub DefaultDecl {
my ($self, $reader) = @_;
my $data = $reader->data(9);
if ($data =~ /^(\#REQUIRED|\#IMPLIED)/) {
$reader->move_along(length($1));
return $1;
}
my $model = '';
if ($data =~ /^\#FIXED/) {
$reader->move_along(6);
$self->skip_whitespace($reader) || $self->parser_error(
"no whitespace after FIXED specifier", $reader);
my $value = $self->AttValue($reader);
return "#FIXED", $value;
}
my $value = $self->AttValue($reader);
return undef, $value;
}
sub EntityDecl {
my ($self, $reader) = @_;
my $data = $reader->data(8);
return 0 unless $data =~ /^<!ENTITY/;
$reader->move_along(8);
$self->skip_whitespace($reader) || $self->parser_error(
"No whitespace after ENTITY declaration", $reader);
$self->PEDecl($reader) || $self->GEDecl($reader);
$self->skip_whitespace($reader);
$reader->match('>') or $self->parser_error("No closing '>' in entity definition", $reader);
return 1;
}
sub GEDecl {
my ($self, $reader) = @_;
my $name = $self->Name($reader) || $self->parser_error("No entity name given", $reader);
$self->skip_whitespace($reader) || $self->parser_error("No whitespace after entity name", $reader);
# TODO: ExternalID calls lexhandler method. Wrong place for it.
my $value;
if ($value = $self->ExternalID($reader)) {
$value .= $self->NDataDecl($reader);
}
else {
$value = $self->EntityValue($reader);
}
if ($self->{ParseOptions}{entities}{$name}) {
warn("entity $name already exists\n");
} else {
$self->{ParseOptions}{entities}{$name} = 1;
$self->{ParseOptions}{expanded_entity}{$name} = $value; # ???
}
# do callback?
return 1;
}
sub PEDecl {
my ($self, $reader) = @_;
return 0 unless $reader->match('%');
$self->skip_whitespace($reader) || $self->parser_error("No whitespace after parameter entity marker", $reader);
my $name = $self->Name($reader) || $self->parser_error("No parameter entity name given", $reader);
$self->skip_whitespace($reader) || $self->parser_error("No whitespace after parameter entity name", $reader);
my $value = $self->ExternalID($reader) ||
$self->EntityValue($reader) ||
$self->parser_error("PE is not a value or an external resource", $reader);
# do callback?
return 1;
}
my $quotre = qr/[^%&\"]/;
my $aposre = qr/[^%&\']/;
sub EntityValue {
my ($self, $reader) = @_;
my $data = $reader->data;
my $quote = '"';
my $re = $quotre;
if ($data !~ /^"/) {
$data =~ /^'/ or $self->parser_error("Not a quote character", $reader);
$quote = "'";
$re = $aposre;
}
$reader->move_along(1);
my $value = '';
while (1) {
my $data = $reader->data;
$self->parser_error("EOF found while reading entity value", $reader)
unless length($data);
if ($data =~ /^($re+)/) {
my $match = $1;
$value .= $match;
$reader->move_along(length($match));
}
elsif ($reader->match('&')) {
# if it's a char ref, expand now:
if ($reader->match('#')) {
my $char;
my $ref = '';
if ($reader->match('x')) {
my $data = $reader->data;
while (1) {
$self->parser_error("EOF looking for reference end", $reader)
unless length($data);
if ($data !~ /^([0-9a-fA-F]*)/) {
last;
}
$ref .= $1;
$reader->move_along(length($1));
if (length($1) == length($data)) {
$data = $reader->data;
}
else {
last;
}
}
$char = chr_ref(hex($ref));
$ref = "x$ref";
}
else {
my $data = $reader->data;
while (1) {
$self->parser_error("EOF looking for reference end", $reader)
unless length($data);
if ($data !~ /^([0-9]*)/) {
last;
}
$ref .= $1;
$reader->move_along(length($1));
if (length($1) == length($data)) {
$data = $reader->data;
}
else {
last;
}
}
$char = chr($ref);
}
$reader->match(';') ||
$self->parser_error("No semi-colon found after character reference", $reader);
if ($char !~ $SingleChar) { # match a single character
$self->parser_error("Character reference '&#$ref;' refers to an illegal XML character ($char)", $reader);
}
$value .= $char;
}
else {
# entity refs in entities get expanded later, so don't parse now.
$value .= '&';
}
}
elsif ($reader->match('%')) {
$value .= $self->PEReference($reader);
}
elsif ($reader->match($quote)) {
# end of attrib
last;
}
else {
$self->parser_error("Invalid character in attribute value: " . substr($reader->data, 0, 1), $reader);
}
}
return $value;
}
sub NDataDecl {
my ($self, $reader) = @_;
$self->skip_whitespace($reader) || return '';
my $data = $reader->data(5);
return '' unless $data =~ /^NDATA/;
$reader->move_along(5);
$self->skip_whitespace($reader) || $self->parser_error("No whitespace after NDATA declaration", $reader);
my $name = $self->Name($reader) || $self->parser_error("NDATA declaration lacks a proper Name", $reader);
return " NDATA $name";
}
sub NotationDecl {
my ($self, $reader) = @_;
my $data = $reader->data(10);
return 0 unless $data =~ /^<!NOTATION/;
$reader->move_along(10);
$self->skip_whitespace($reader) ||
$self->parser_error("No whitespace after NOTATION declaration", $reader);
$data = $reader->data;
my $value = '';
while(1) {
$self->parser_error("EOF found while looking for end of NotationDecl", $reader)
unless length($data);
if ($data =~ /^([^>]*)>/) {
$value .= $1;
$reader->move_along(length($1) + 1);
$self->notation_decl({Name => "FIXME", SystemId => "FIXME", PublicId => "FIXME" });
last;
}
else {
$value .= $data;
$reader->move_along(length($data));
$data = $reader->data;
}
}
return 1;
}
1;