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d8dea963fa
6d5547a Set version to 1.0.0-b34 6fab138 Fix and tidy up CMake build scripts: ccefa54 Set version to 1.0.0-b33 32afe41 Set internal state correctly when writing frames: fe3e20b Add write_frames unit test 578dcd0 Add decorator unit test aaa3733 Use fwrite return value in file_body df66165 Require Visual Studio 2015 Update 3 or later b8e5a21 Set version to 1.0.0-b32 ffb1758 Update CMake scripts for finding packages: b893749 Remove http Writer suspend and resume feature (API Change): 27864fb Add io_service completion invariants tests eba05a7 Set version to 1.0.0-b31 484bcef Fix badge markdown in README.md 5663bea Add missing dynabuf_readstream member 0d7a551 Tidy up build settings 0fd4030 Move the handler, don't copy it git-subtree-dir: src/beast git-subtree-split: 6d5547a32c50ec95832c4779311502555ab0ee1f
70 lines
1.8 KiB
C++
70 lines
1.8 KiB
C++
//
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// Copyright (c) 2013-2017 Vinnie Falco (vinnie dot falco at gmail dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef BEAST_PREPARE_BUFFER_HPP
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#define BEAST_PREPARE_BUFFER_HPP
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#include <beast/config.hpp>
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#include <boost/asio/buffer.hpp>
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#include <algorithm>
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namespace beast {
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/** Return a shortened buffer.
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The returned buffer points to the same memory as the
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passed buffer, but with a size that is equal to or less
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than the size of the original buffer.
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@param n The size of the returned buffer.
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@param buffer The buffer to shorten. Ownership of the
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underlying memory is not transferred.
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@return A new buffer that points to the first `n` bytes
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of the original buffer.
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*/
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inline
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boost::asio::const_buffer
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prepare_buffer(std::size_t n,
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boost::asio::const_buffer buffer)
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{
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using boost::asio::buffer_cast;
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using boost::asio::buffer_size;
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return { buffer_cast<void const*>(buffer),
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(std::min)(n, buffer_size(buffer)) };
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}
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/** Return a shortened buffer.
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The returned buffer points to the same memory as the
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passed buffer, but with a size that is equal to or less
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than the size of the original buffer.
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@param n The size of the returned buffer.
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@param buffer The buffer to shorten. Ownership of the
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underlying memory is not transferred.
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@return A new buffer that points to the first `n` bytes
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of the original buffer.
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*/
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inline
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boost::asio::mutable_buffer
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prepare_buffer(std::size_t n,
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boost::asio::mutable_buffer buffer)
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{
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using boost::asio::buffer_cast;
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using boost::asio::buffer_size;
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return { buffer_cast<void*>(buffer),
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(std::min)(n, buffer_size(buffer)) };
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}
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} // beast
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#endif
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