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# $Id$
package XML::SAX::PurePerl::Reader::Stream;
use strict;
use vars qw(@ISA);
use XML::SAX::PurePerl::Reader qw(
EOF
BUFFER
LINE
COLUMN
ENCODING
XML_VERSION
);
use XML::SAX::Exception;
@ISA = ('XML::SAX::PurePerl::Reader');
# subclassed by adding 1 to last element
use constant FH => 8;
use constant BUFFER_SIZE => 4096;
sub new {
my $class = shift;
my $ioref = shift;
XML::SAX::PurePerl::Reader::set_raw_stream($ioref);
my @parts;
@parts[FH, LINE, COLUMN, BUFFER, EOF, XML_VERSION] =
($ioref, 1, 0, '', 0, '1.0');
return bless \@parts, $class;
}
sub read_more {
my $self = shift;
my $buf;
my $bytesread = read($self->[FH], $buf, BUFFER_SIZE);
if ($bytesread) {
$self->[BUFFER] .= $buf;
return 1;
}
elsif (defined($bytesread)) {
$self->[EOF]++;
return 0;
}
else {
throw XML::SAX::Exception::Parse(
Message => "Error reading from filehandle: $!",
);
}
}
sub move_along {
my $self = shift;
my $discarded = substr($self->[BUFFER], 0, $_[0], '');
# Wish I could skip this lot - tells us where we are in the file
my $lines = $discarded =~ tr/\n//;
$self->[LINE] += $lines;
if ($lines) {
$discarded =~ /\n([^\n]*)$/;
$self->[COLUMN] = length($1);
}
else {
$self->[COLUMN] += $_[0];
}
}
sub set_encoding {
my $self = shift;
my ($encoding) = @_;
# warn("set encoding to: $encoding\n");
XML::SAX::PurePerl::Reader::switch_encoding_stream($self->[FH], $encoding);
XML::SAX::PurePerl::Reader::switch_encoding_string($self->[BUFFER], $encoding);
$self->[ENCODING] = $encoding;
}
sub bytepos {
my $self = shift;
tell($self->[FH]);
}
1;