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LEARN ABOUT DEBIAN
crypt::random::source::base::handle
Crypt::Random::Source::Base::Handle(3pm) User Contributed Perl Documentation Crypt::Random::Source::Base::Handle(3pm)
NAME
Crypt::Random::Source::Base::Handle - IO::Handle based random data sources
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, $n ); # no error handling here
DESCRIPTION
This is a concrete base class for all IO::Handle based random data sources.
It implements error handling
ATTRIBUTES
handle
An IO::Handle or file handle to read from.
blocking
This is actually handled by "handle", and is documented in IO::Handle.
allow_under_read
Whether or not under reading is considered an error.
Defaults to false.
reread_attempts
The number of attempts to make at rereading if the handle did not provide enough bytes on the first attempt.
Defaults to 1.
Only used if "allow_under_read" is enabled.
METHODS
get
See "get" in Crypt::Random::Source::Base.
When "blocking" or "allow_under_read" are set to a true value this method may return fewer bytes than requested.
read
This delegates directly to "handle".
It DOES NOT provide the same validation as "get" would have, so no checking for underreads is done.
close
Close the handle and clear it.
_read
"$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.
AUTHOR
Yuval Kogman <nothingmuch@woobling.org>
COPYRIGHT AND LICENSE
This software is copyright (c) 2011 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.
perl v5.14.2 2011-01-05 Crypt::Random::Source::Base::Handle(3pm)
