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##### zlib::z_params::avail_in

The number of bytes of input available at `next_in`.

###### Synopsis

    std::size_t avail_in;

###### Description

If there is no more input, this should be set to zero.

| Copyright © 2016-2019 Vinnie Falco Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)