1 package DBM::Deep::Sector::File::Null;
6 use warnings FATAL => 'all';
8 use base qw( DBM::Deep::Sector::File::Data );
12 # Please refer to the pack() documentation for further information
14 1 => 'C', # Unsigned char value (no order needed as it's just one byte)
15 2 => 'n', # Unsigned short in "network" (big-endian) order
16 4 => 'N', # Unsigned long in "network" (big-endian) order
17 8 => 'Q', # Usigned quad (no order specified, presumably machine-dependent)
20 sub type { $_[0]{engine}->SIG_NULL }
27 my $engine = $self->engine;
29 unless ( $self->offset ) {
30 my $leftover = $self->size - $self->base_size - 1 * $engine->byte_size - 1;
32 $self->{offset} = $engine->_request_data_sector( $self->size );
33 $engine->storage->print_at( $self->offset, $self->type ); # Sector type
34 # Skip staleness counter
35 $engine->storage->print_at( $self->offset + $self->base_size,
36 pack( $StP{$engine->byte_size}, 0 ), # Chain loc
37 pack( $StP{1}, $self->data_length ), # Data length
38 chr(0) x $leftover, # Zero-fill the rest