mirror of
https://github.com/matrix-construct/construct
synced 2024-11-18 16:00:57 +01:00
117 lines
2.1 KiB
C++
117 lines
2.1 KiB
C++
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2018 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. The
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// full license for this software is available in the LICENSE file.
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#pragma once
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#define HAVE_IRCD_UTIL_PUBSETBUF_H
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//
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// stringstream buffer set macros
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//
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namespace ircd {
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inline namespace util {
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inline std::stringbuf &
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pubsetbuf(std::stringbuf &sb,
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const mutable_buffer &buf)
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{
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sb.pubsetbuf(data(buf), size(buf));
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return sb;
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}
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template<class stringstream>
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inline stringstream &
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pubsetbuf(stringstream &ss,
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const mutable_buffer &buf)
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{
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ss.rdbuf()->pubsetbuf(data(buf), size(buf));
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return ss;
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}
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template<class stringstream>
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inline stringstream &
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pubsetbuf(stringstream &ss,
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std::string &s)
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{
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auto *const &data
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{
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mutable_cast(s.data())
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};
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ss.rdbuf()->pubsetbuf(data, s.size());
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return ss;
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}
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template<class stringstream>
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inline stringstream &
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pubsetbuf(stringstream &ss,
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std::string &s,
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const size_t &size)
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{
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s.resize(size, char{});
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return pubsetbuf(ss, s);
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}
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template<class stringstream>
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inline stringstream &
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resizebuf(stringstream &ss,
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std::string &s)
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{
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const auto pos(ss.tellp());
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assert(pos >= 0);
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s.resize(pos);
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return ss;
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}
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#if RB_CXX_EPOCH >= 11 || defined(__clang__)
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/// since c++20
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inline string_view
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view(std::stringbuf &sb,
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const const_buffer &buf = {})
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{
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const string_view ret
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{
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sb.view()
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};
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assert(!buf || data(ret) == data(buf));
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return ret;
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}
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#endif
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/// buf has to match the rdbuf you gave the stringstream
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template<class stringstream>
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inline string_view
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view(stringstream &ss,
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const const_buffer &buf)
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{
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const size_t tell
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(
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std::clamp
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(
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ssize_t(ss.tellp()),
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ssize_t(0),
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ssize_t(size(buf))
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)
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);
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ss.flush();
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ss.rdbuf()->pubsync();
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const string_view ret
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{
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data(buf), tell
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};
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assert(size(ret) <= size(buf));
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return ret;
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}
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} // namespace util
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} // namespace ircd
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