69 lines
1.4 KiB
Perl
69 lines
1.4 KiB
Perl
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package IO::Seekable;
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=head1 NAME
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IO::Seekable - supply seek based methods for I/O objects
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=head1 SYNOPSIS
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use IO::Seekable;
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package IO::Something;
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@ISA = qw(IO::Seekable);
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=head1 DESCRIPTION
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C<IO::Seekable> does not have a constuctor of its own as is intended to
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be inherited by other C<IO::Handle> based objects. It provides methods
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which allow seeking of the file descriptors.
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If the C functions fgetpos() and fsetpos() are available, then
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C<IO::File::getpos> returns an opaque value that represents the
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current position of the IO::File, and C<IO::File::setpos> uses
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that value to return to a previously visited position.
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See L<perlfunc> for complete descriptions of each of the following
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supported C<IO::Seekable> methods, which are just front ends for the
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corresponding built-in functions:
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seek
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tell
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=head1 SEE ALSO
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L<perlfunc>,
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L<perlop/"I/O Operators">,
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L<IO::Handle>
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L<IO::File>
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=head1 HISTORY
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Derived from FileHandle.pm by Graham Barr E<lt>bodg@tiuk.ti.comE<gt>
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=cut
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require 5.000;
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use Carp;
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use strict;
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use vars qw($VERSION @EXPORT @ISA);
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use IO::Handle qw(SEEK_SET SEEK_CUR SEEK_END);
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require Exporter;
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@EXPORT = qw(SEEK_SET SEEK_CUR SEEK_END);
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@ISA = qw(Exporter);
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$VERSION = "1.06";
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sub seek {
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@_ == 3 or croak 'usage: $fh->seek(POS, WHENCE)';
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seek($_[0], $_[1], $_[2]);
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}
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sub tell {
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@_ == 1 or croak 'usage: $fh->tell()';
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tell($_[0]);
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}
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1;
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