# $Id: String.pm,v 1.6 2008-08-04 03:35:44 grant Exp $
package XML::SAX::PurePerl::Reader::String;
use strict;
use vars qw(@ISA);
use XML::SAX::PurePerl::Reader qw(
LINE
COLUMN
BUFFER
ENCODING
EOF
);
@ISA = ('XML::SAX::PurePerl::Reader');
use constant DISCARDED => 8;
use constant STRING => 9;
use constant USED => 10;
use constant CHUNK_SIZE => 2048;
sub new {
my $class = shift;
my $string = shift;
my @parts;
@parts[BUFFER, EOF, LINE, COLUMN, DISCARDED, STRING, USED] =
('', 0, 1, 0, 0, $string, 0);
return bless \@parts, $class;
}
sub read_more () {
my $self = shift;
if ($self->[USED] >= length($self->[STRING])) {
$self->[EOF]++;
return 0;
}
my $bytes = CHUNK_SIZE;
if ($bytes > (length($self->[STRING]) - $self->[USED])) {
$bytes = (length($self->[STRING]) - $self->[USED]);
}
$self->[BUFFER] .= substr($self->[STRING], $self->[USED], $bytes);
$self->[USED] += $bytes;
return 1;
}
sub move_along {
my($self, $bytes) = @_;
my $discarded = substr($self->[BUFFER], 0, $bytes, '');
$self->[DISCARDED] += length($discarded);
# 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) = @_;
XML::SAX::PurePerl::Reader::switch_encoding_string($self->[BUFFER], $encoding, "utf-8");
$self->[ENCODING] = $encoding;
}
sub bytepos {
my $self = shift;
$self->[DISCARDED];
}
1;
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