stringmember.pm

视频监控网络部分的协议ddns,的模块的实现代码,请大家大胆指正.

package Archive::Zip::StringMember;

use strict;
use vars qw( $VERSION @ISA );

BEGIN {
    $VERSION = '1.23';
    @ISA     = qw( Archive::Zip::Member );
}

use Archive::Zip qw(
  :CONSTANTS
  :ERROR_CODES
);

# Create a new string member. Default is COMPRESSION_STORED.
# Can take a ref to a string as well.
sub _newFromString {
    my $class  = shift;
    my $string = shift;
    my $name   = shift;
    my $self   = $class->new(@_);
    $self->contents($string);
    $self->fileName($name) if defined($name);

    # Set the file date to now
    $self->setLastModFileDateTimeFromUnix( time() );
    $self->unixFileAttributes( $self->DEFAULT_FILE_PERMISSIONS );
    return $self;
}

sub _become {
    my $self     = shift;
    my $newClass = shift;
    return $self if ref($self) eq $newClass;
    delete( $self->{'contents'} );
    return $self->SUPER::_become($newClass);
}

# Get or set my contents. Note that we do not call the superclass
# version of this, because it calls us.
sub contents {
    my $self   = shift;
    my $string = shift;
    if ( defined($string) ) {
        $self->{'contents'} =
          pack( 'C0a*', ( ref($string) eq 'SCALAR' ) ? $$string : $string );
        $self->{'uncompressedSize'} = $self->{'compressedSize'} =
          length( $self->{'contents'} );
        $self->{'compressionMethod'} = COMPRESSION_STORED;
    }
    return $self->{'contents'};
}

# Return bytes read. Note that first parameter is a ref to a buffer.
# my $data;
# my ( $bytesRead, $status) = $self->readRawChunk( \$data, $chunkSize );
sub _readRawChunk {
    my ( $self, $dataRef, $chunkSize ) = @_;
    $$dataRef = substr( $self->contents(), $self->_readOffset(), $chunkSize );
    return ( length($$dataRef), AZ_OK );
}

1;