mirror of
https://github.com/matrix-construct/construct
synced 2024-12-01 19:22:53 +01:00
99 lines
2.6 KiB
C++
99 lines
2.6 KiB
C++
/*
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* Copyright (C) 2016 Charybdis Development Team
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* Copyright (C) 2016 Jason Volk <jason@zemos.net>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice is present in all copies.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef __cplusplus
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namespace ircd {
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struct rbuf
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{
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tape reel; // @0 +80 ||
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std::exception_ptr eptr; // @80 +8 |
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uint16_t checked; // @88 +2 |
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uint16_t length; // @90 +2 |
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std::array<char, BUFSIZE> buf alignas(16); // @96(92) +512 |||||||||
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// @608 | 640
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bool terminated() const; // rbuf has LF termination
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uint16_t remaining() const; // bytes remaining in rbuf
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size_t handle_pck(const error_code &, const size_t) noexcept;
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void reset();
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rbuf();
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};
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static_assert(BUFSIZE == 512, "");
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inline
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rbuf::rbuf()
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:checked{0}
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,length{0}
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{
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}
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inline void
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rbuf::reset()
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{
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checked = 0;
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length = 0;
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}
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inline size_t
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rbuf::handle_pck(const error_code &ec,
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const size_t bytes)
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noexcept try
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{
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if(ec)
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return 0;
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length += bytes;
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if(reel.append(buf.data(), length))
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return 0;
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if(terminated())
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throw rfc1459::syntax_error("invalid syntax"); //TODO: eps + ERR_
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checked = length;
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return remaining()?: throw rfc1459::syntax_error("message length exceeded"); //TODO: ERR_
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}
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catch(...)
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{
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eptr = std::current_exception();
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return 0;
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}
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inline uint16_t
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ircd::rbuf::remaining()
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const
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{
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return buf.size() - length;
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}
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inline bool
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rbuf::terminated()
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const
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{
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const auto b(std::next(buf.rbegin(), remaining()));
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const auto e(std::next(buf.rbegin(), buf.size() - checked));
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return std::find(b, e, '\n') != e;
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}
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} // namespace ircd
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#endif // __cplusplus
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