mirror of
https://github.com/matrix-construct/construct
synced 2024-10-30 02:18:58 +01:00
125 lines
3 KiB
C++
125 lines
3 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_BUFFER_BASE_H
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/// Base for all buffer types
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///
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template<class it>
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struct ircd::buffer::buffer
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:std::pair<it, it>
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{
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using iterator = it;
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using value_type = typename std::remove_pointer<iterator>::type;
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auto &begin() const { return std::get<0>(*this); }
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auto &begin() { return std::get<0>(*this); }
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auto &end() const { return std::get<1>(*this); }
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auto &end() { return std::get<1>(*this); }
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bool null() const;
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bool empty() const; // For boost::spirit conceptual compliance.
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auto &operator[](const size_t &i) const;
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auto &operator[](const size_t &i);
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explicit operator const it &() const;
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explicit operator std::string_view() const;
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explicit operator std::string() const;
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operator string_view() const;
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buffer(const it &start, const it &stop);
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buffer(const it &start, const size_t &size);
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buffer();
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};
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template<class it>
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inline __attribute__((always_inline))
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ircd::buffer::buffer<it>::buffer()
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:buffer{nullptr, nullptr}
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{}
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template<class it>
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inline __attribute__((always_inline))
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ircd::buffer::buffer<it>::buffer(const it &start,
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const size_t &size)
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:buffer{start, start + size}
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{}
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template<class it>
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inline __attribute__((always_inline, flatten))
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ircd::buffer::buffer<it>::buffer(const it &start,
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const it &stop)
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:std::pair<it, it>{start, stop}
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{}
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template<class it>
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inline __attribute__((always_inline, flatten))
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ircd::buffer::buffer<it>::operator string_view()
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const
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{
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return { reinterpret_cast<const char *>(data(*this)), size(*this) };
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}
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template<class it>
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ircd::buffer::buffer<it>::operator std::string()
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const
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{
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return { reinterpret_cast<const char *>(data(*this)), size(*this) };
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}
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template<class it>
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ircd::buffer::buffer<it>::operator std::string_view()
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const
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{
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return { reinterpret_cast<const char *>(data(*this)), size(*this) };
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}
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template<class it>
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auto &
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ircd::buffer::buffer<it>::operator[](const size_t &i)
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{
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assert(begin() + i < end());
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return *(begin() + i);
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}
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template<class it>
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auto &
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ircd::buffer::buffer<it>::operator[](const size_t &i)
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const
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{
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assert(begin() + i < end());
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return *(begin() + i);
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}
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template<class it>
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bool
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ircd::buffer::buffer<it>::empty()
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const
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{
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return null() || std::distance(begin(), end()) == 0;
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}
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template<class it>
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bool
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ircd::buffer::buffer<it>::null()
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const
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{
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return !begin();
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}
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template<class it>
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ircd::buffer::buffer<it>::operator
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const it &()
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const
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{
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return begin();
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}
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