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Man Pages


Manual Reference Pages  -  CRYPT::RANDOM::SOURCE::BASE::HANDLE (3)

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NAME

Crypt::Random::Source::Base::Handle - IO::Handle based random data sources

CONTENTS

VERSION

version 0.11

SYNOPSIS



    use Moose;
    extends qw(Crypt::Random::Source::Base::Handle);

    sub open_handle {
        # invoked as needed
    }


    # this class can also be used directly
    Crypt::Random::Source::Base::Handle->new( handle => $file_handle );


    # it supports some standard methods:

    $p->blocking(0);

    $p->read( my $buf, $n ); # no error handling here



DESCRIPTION

This is a concrete base class for all IO::Handle based random data sources.

It implements error handling

ATTRIBUTES

    handle

An IO::Handle or file handle to read from.

    blocking

This is actually handled by handle, and is documented in IO::Handle.

    allow_under_read

Whether or not under reading is considered an error.

Defaults to false.

    reread_attempts

The number of attempts to make at rereading if the handle did not provide enough bytes on the first attempt.

Defaults to 1.

Only used if allow_under_read is enabled.

METHODS

    get

See get in Crypt::Random::Source::Base.

When blocking or allow_under_read are set to a true value this method may return fewer bytes than requested.

    read

This delegates directly to handle.

It <B>DOES NOTB> provide the same validation as get would have, so no checking for underreads is done.

    close

Close the handle and clear it.

    _read

$self->handle->read but with additional error checking and different calling conventions.

    _read_too_short

Called by _read when not enough data was read from the handle. Normally it will either die with an error or attempt to reread. When allow_under_read is true it will just return the partial buffer.

    open_handle

Abstract method, should return an IO::Handle to use.

SUPPORT

Bugs may be submitted through the RT bug tracker <https://rt.cpan.org/Public/Dist/Display.html?Name=Crypt-Random-Source> (or bug-Crypt-Random-Source@rt.cpan.org <mailto:bug-Crypt-Random-Source@rt.cpan.org>).

AUTHOR

XXXX XXXXX (Yuval Kogman) <nothingmuch@woobling.org>

COPYRIGHT AND LICENCE

This software is copyright (c) 2008 by Yuval Kogman.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

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perl v5.20.3 CRYPT::RANDOM::SOURCE::BASE::HANDLE (3) 2015-10-24

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