mirror of
https://github.com/matrix-construct/construct
synced 2024-11-09 03:21:15 +01:00
73 lines
2.4 KiB
C++
73 lines
2.4 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_M_EVENT_GET_H
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namespace ircd::m
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{
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// Fetch the value for a single property of an event into the closure
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bool get(std::nothrow_t, const event::idx &, const string_view &key, const event::fetch::view_closure &);
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bool get(std::nothrow_t, const event::id &, const string_view &key, const event::fetch::view_closure &);
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// Throws if event or property in that event not found
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void get(const event::idx &, const string_view &key, const event::fetch::view_closure &);
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void get(const event::id &, const string_view &key, const event::fetch::view_closure &);
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// Copies value into buffer returning view (empty for not found)
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const_buffer get(std::nothrow_t, const event::idx &, const string_view &key, const mutable_buffer &out);
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const_buffer get(std::nothrow_t, const event::id &, const string_view &key, const mutable_buffer &out);
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const_buffer get(const event::idx &, const string_view &key, const mutable_buffer &out);
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const_buffer get(const event::id &, const string_view &key, const mutable_buffer &out);
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template<class T>
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typename std::enable_if<std::is_integral<T>::value, bool>::type
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get(const event::idx &, const string_view &key, T &ret);
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template<class T>
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typename std::enable_if<std::is_integral<T>::value, T>::type
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get(const event::idx &, const string_view &key);
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}
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template<class T>
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typename std::enable_if<std::is_integral<T>::value, T>::type
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ircd::m::get(const event::idx &event_idx,
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const string_view &key)
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{
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T ret;
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const mutable_buffer buf
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{
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reinterpret_cast<char *>(&ret), sizeof(ret)
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};
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get(event_idx, key, buf);
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return ret;
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}
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template<class T>
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typename std::enable_if<std::is_integral<T>::value, bool>::type
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ircd::m::get(const event::idx &event_idx,
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const string_view &key,
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T &ret)
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{
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const mutable_buffer buf
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{
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reinterpret_cast<char *>(&ret), sizeof(ret)
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};
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const auto rbuf
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{
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get(std::nothrow, event_idx, key, buf)
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};
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assert(size(rbuf) >= sizeof(T));
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return !empty(rbuf);
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}
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