mirror of
https://github.com/matrix-construct/construct
synced 2024-10-31 02:48:58 +01:00
196 lines
4.5 KiB
C++
196 lines
4.5 KiB
C++
/*
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* Copyright (C) 2017 Charybdis Development Team
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* Copyright (C) 2017 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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#pragma once
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#define HAVE_IRCD_JSON_VAL_H
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namespace ircd {
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namespace json {
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struct val
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{
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union // xxx std::variant
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{
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int64_t integer;
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double floating;
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const char *string;
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const struct obj *object;
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const struct array *array;
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};
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uint64_t len : 58;
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enum type type : 3;
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uint64_t serial : 1;
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uint64_t alloc : 1;
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uint64_t floats : 1;
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public:
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bool empty() const;
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size_t size() const;
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operator string_view() const;
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explicit operator std::string() const;
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template<class T> explicit val(const T &specialized);
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template<size_t N> val(const char (&)[N]);
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val(const string_view &sv, const enum type &);
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val(const string_view &sv);
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val(const char *const &s);
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val(const struct obj *const &); // alloc = false
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val(std::unique_ptr<obj>); // alloc = true
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val();
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val(val &&) noexcept;
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val(const val &) = delete;
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val &operator=(val &&) noexcept;
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val &operator=(const val &) = delete;
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~val() noexcept;
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friend enum type type(const val &a);
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friend bool operator==(const val &a, const val &b);
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friend bool operator!=(const val &a, const val &b);
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friend bool operator<=(const val &a, const val &b);
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friend bool operator>=(const val &a, const val &b);
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friend bool operator<(const val &a, const val &b);
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friend bool operator>(const val &a, const val &b);
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friend std::ostream &operator<<(std::ostream &, const val &);
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};
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template<> val::val(const double &floating);
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template<> val::val(const int64_t &integer);
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template<> inline val::val(const float &floating): val { double(floating) } {}
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template<> inline val::val(const int32_t &integer): val { int64_t(integer) } {}
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template<> inline val::val(const int16_t &integer): val { int64_t(integer) } {}
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template<> inline val::val(const std::string &str): val { string_view{str} } {}
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static_assert(sizeof(val) == 16, "");
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} // namespace json
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} // namespace ircd
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inline
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ircd::json::val::val()
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:string{""}
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,len{0}
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,type{STRING}
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,serial{true}
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,alloc{false}
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,floats{false}
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{}
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template<size_t N>
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ircd::json::val::val(const char (&str)[N])
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:val{string_view{str}}
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{}
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inline
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ircd::json::val::val(const char *const &s)
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:val{string_view{s}}
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{}
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inline
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ircd::json::val::val(const string_view &sv)
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:val{sv, json::type(sv, std::nothrow)}
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{}
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inline
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ircd::json::val::val(const string_view &sv,
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const enum type &type)
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:string{sv.data()}
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,len{sv.size()}
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,type{type}
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,serial{true}
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,alloc{false}
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,floats{false}
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{}
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template<> inline
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ircd::json::val::val(const int64_t &integer)
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:integer{integer}
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,len{0}
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,type{NUMBER}
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,serial{false}
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,alloc{false}
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,floats{false}
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{}
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template<> inline
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ircd::json::val::val(const double &floating)
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:floating{floating}
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,len{0}
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,type{NUMBER}
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,serial{false}
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,alloc{false}
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,floats{true}
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{}
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inline
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ircd::json::val::val(const struct obj *const &object)
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:object{object}
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,len{0}
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,type{OBJECT}
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,serial{false}
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,alloc{false}
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,floats{false}
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{}
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inline
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ircd::json::val::val(std::unique_ptr<obj> object)
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:object{object.get()}
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,len{0}
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,type{OBJECT}
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,serial{false}
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,alloc{true}
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,floats{false}
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{
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object.release();
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}
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inline
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ircd::json::val::val(val &&other)
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noexcept
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:integer{other.integer}
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,len{other.len}
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,type{other.type}
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,serial{other.serial}
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,alloc{other.alloc}
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,floats{other.floats}
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{
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other.alloc = false;
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}
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inline ircd::json::val &
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ircd::json::val::operator=(val &&other)
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noexcept
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{
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this->~val();
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integer = other.integer;
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len = other.len;
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type = other.type;
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serial = other.serial;
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alloc = other.alloc;
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other.alloc = false;
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floats = other.floats;
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return *this;
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}
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inline enum ircd::json::type
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ircd::json::type(const val &a)
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{
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return a.type;
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}
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