Initial Commit

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

@@ -0,0 +1,105 @@
+# $Id$
+
+package XML::SAX::PurePerl; # NB, not ::EncodingDetect!
+
+use strict;
+
+sub encoding_detect {
+    my ($parser, $reader) = @_;
+    
+    my $error = "Invalid byte sequence at start of file";
+    
+    my $data = $reader->data;
+    if ($data =~ /^\x00\x00\xFE\xFF/) {
+        # BO-UCS4-be
+        $reader->move_along(4);
+        $reader->set_encoding('UCS-4BE');
+        return;
+    }
+    elsif ($data =~ /^\x00\x00\xFF\xFE/) {
+        # BO-UCS-4-2143
+        $reader->move_along(4);
+        $reader->set_encoding('UCS-4-2143');
+        return;
+    }
+    elsif ($data =~ /^\x00\x00\x00\x3C/) {
+        $reader->set_encoding('UCS-4BE');
+        return;
+    }
+    elsif ($data =~ /^\x00\x00\x3C\x00/) {
+        $reader->set_encoding('UCS-4-2143');
+        return;
+    }
+    elsif ($data =~ /^\x00\x3C\x00\x00/) {
+        $reader->set_encoding('UCS-4-3412');
+        return;
+    }
+    elsif ($data =~ /^\x00\x3C\x00\x3F/) {
+        $reader->set_encoding('UTF-16BE');
+        return;
+    }
+    elsif ($data =~ /^\xFF\xFE\x00\x00/) {
+        # BO-UCS-4LE
+        $reader->move_along(4);
+        $reader->set_encoding('UCS-4LE');
+        return;
+    }
+    elsif ($data =~ /^\xFF\xFE/) {
+        $reader->move_along(2);
+        $reader->set_encoding('UTF-16LE');
+        return;
+    }
+    elsif ($data =~ /^\xFE\xFF\x00\x00/) {
+        $reader->move_along(4);
+        $reader->set_encoding('UCS-4-3412');
+        return;
+    }
+    elsif ($data =~ /^\xFE\xFF/) {
+        $reader->move_along(2);
+        $reader->set_encoding('UTF-16BE');
+        return;
+    }
+    elsif ($data =~ /^\xEF\xBB\xBF/) { # UTF-8 BOM
+        $reader->move_along(3);
+        $reader->set_encoding('UTF-8');
+        return;
+    }
+    elsif ($data =~ /^\x3C\x00\x00\x00/) {
+        $reader->set_encoding('UCS-4LE');
+        return;
+    }
+    elsif ($data =~ /^\x3C\x00\x3F\x00/) {
+        $reader->set_encoding('UTF-16LE');
+        return;
+    }
+    elsif ($data =~ /^\x3C\x3F\x78\x6D/) {
+        # $reader->set_encoding('UTF-8');
+        return;
+    }
+    elsif ($data =~ /^\x3C\x3F\x78/) {
+        # $reader->set_encoding('UTF-8');
+        return;
+    }
+    elsif ($data =~ /^\x3C\x3F/) {
+        # $reader->set_encoding('UTF-8');
+        return;
+    }
+    elsif ($data =~ /^\x3C/) {
+        # $reader->set_encoding('UTF-8');
+        return;
+    }
+    elsif ($data =~ /^[\x20\x09\x0A\x0D]+\x3C[^\x3F]/) {
+        # $reader->set_encoding('UTF-8');
+        return;
+    }
+    elsif ($data =~ /^\x4C\x6F\xA7\x94/) {
+        $reader->set_encoding('EBCDIC');
+        return;
+    }
+    
+    warn("Unable to recognise encoding of this document");
+    return;
+}
+
+1;
+