Initial Commit

database/perl/vendor/lib/XML/SAX/PurePerl/XMLDecl.pm

@@ -0,0 +1,129 @@
+# $Id$
+
+package XML::SAX::PurePerl;
+
+use strict;
+use XML::SAX::PurePerl::Productions qw($S $VersionNum $EncNameStart $EncNameEnd);
+
+sub XMLDecl {
+    my ($self, $reader) = @_;
+    
+    my $data = $reader->data(5);
+    # warn("Looking for xmldecl in: $data");
+    if ($data =~ /^<\?xml$S/o) {
+        $reader->move_along(5);
+        $self->skip_whitespace($reader);
+        
+        # get version attribute
+        $self->VersionInfo($reader) || 
+            $self->parser_error("XML Declaration lacks required version attribute, or version attribute does not match XML specification", $reader);
+        
+        if (!$self->skip_whitespace($reader)) {
+            my $data = $reader->data(2);
+            $data =~ /^\?>/ or $self->parser_error("Syntax error", $reader);
+            $reader->move_along(2);
+            return;
+        }
+        
+        if ($self->EncodingDecl($reader)) {
+            if (!$self->skip_whitespace($reader)) {
+                my $data = $reader->data(2);
+                $data =~ /^\?>/ or $self->parser_error("Syntax error", $reader);
+                $reader->move_along(2);
+                return;
+            }
+        }
+        
+        $self->SDDecl($reader);
+        
+        $self->skip_whitespace($reader);
+        
+        my $data = $reader->data(2);
+        $data =~ /^\?>/ or $self->parser_error("Syntax error", $reader);
+        $reader->move_along(2);
+    }
+    else {
+        # warn("first 5 bytes: ", join(',', unpack("CCCCC", $data)), "\n");
+        # no xml decl
+        if (!$reader->get_encoding) {
+            $reader->set_encoding("UTF-8");
+        }
+    }
+}
+
+sub VersionInfo {
+    my ($self, $reader) = @_;
+    
+    my $data = $reader->data(11);
+    
+    # warn("Looking for version in $data");
+    
+    $data =~ /^(version$S*=$S*(["'])($VersionNum)\2)/o or return 0;
+    $reader->move_along(length($1));
+    my $vernum = $3;
+    
+    if ($vernum ne "1.0") {
+        $self->parser_error("Only XML version 1.0 supported. Saw: '$vernum'", $reader);
+    }
+
+    return 1;
+}
+
+sub SDDecl {
+    my ($self, $reader) = @_;
+    
+    my $data = $reader->data(15);
+    
+    $data =~ /^(standalone$S*=$S*(["'])(yes|no)\2)/o or return 0;
+    $reader->move_along(length($1));
+    my $yesno = $3;
+    
+    if ($yesno eq 'yes') {
+        $self->{standalone} = 1;
+    }
+    else {
+        $self->{standalone} = 0;
+    }
+    
+    return 1;
+}
+
+sub EncodingDecl {
+    my ($self, $reader) = @_;
+    
+    my $data = $reader->data(12);
+    
+    $data =~ /^(encoding$S*=$S*(["'])($EncNameStart$EncNameEnd*)\2)/o or return 0;
+    $reader->move_along(length($1));
+    my $encoding = $3;
+    
+    $reader->set_encoding($encoding);
+    
+    return 1;
+}
+
+sub TextDecl {
+    my ($self, $reader) = @_;
+    
+    my $data = $reader->data(6);
+    $data =~ /^<\?xml$S+/ or return;
+    $reader->move_along(5);
+    $self->skip_whitespace($reader);
+    
+    if ($self->VersionInfo($reader)) {
+        $self->skip_whitespace($reader) ||
+                $self->parser_error("Lack of whitespace after version attribute in text declaration", $reader);
+    }
+    
+    $self->EncodingDecl($reader) ||
+        $self->parser_error("Encoding declaration missing from external entity text declaration", $reader);
+    
+    $self->skip_whitespace($reader);
+    
+    $data = $reader->data(2);
+    $data =~ /^\?>/ or $self->parser_error("Syntax error", $reader);
+    
+    return 1;
+}
+
+1;