mirror of
https://github.com/SerenityOS/serenity
synced 2024-09-06 17:06:31 +00:00
268 lines
6.7 KiB
C++
268 lines
6.7 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <AK/IPv4Address.h>
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#include <AK/Optional.h>
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#include <AK/String.h>
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#include <AK/StringBuilder.h>
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namespace AK {
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class JsonArray;
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class JsonObject;
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class StringBuilder;
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class JsonValue {
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public:
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enum class Type {
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Undefined,
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Null,
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Int32,
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UnsignedInt32,
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Int64,
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UnsignedInt64,
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#if !defined(KERNEL) && !defined(BOOTSTRAPPER)
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Double,
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#endif
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Bool,
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String,
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Array,
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Object,
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};
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static JsonValue from_string(const StringView&);
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explicit JsonValue(Type = Type::Null);
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~JsonValue() { clear(); }
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JsonValue(const JsonValue&);
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JsonValue(JsonValue&&);
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JsonValue& operator=(const JsonValue&);
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JsonValue& operator=(JsonValue&&);
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JsonValue(i32);
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JsonValue(u32);
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JsonValue(i64);
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JsonValue(u64);
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#if !defined(KERNEL) && !defined(BOOTSTRAPPER)
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JsonValue(double);
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#endif
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JsonValue(bool);
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JsonValue(const char*);
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JsonValue(const String&);
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JsonValue(const IPv4Address&);
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JsonValue(const JsonArray&);
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JsonValue(const JsonObject&);
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JsonValue(JsonArray&&);
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JsonValue(JsonObject&&);
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// FIXME: Implement these
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JsonValue& operator=(JsonArray&&) = delete;
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JsonValue& operator=(JsonObject&&) = delete;
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template<typename Builder>
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typename Builder::OutputType serialized() const;
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template<typename Builder>
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void serialize(Builder&) const;
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String as_string_or(const String& alternative)
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{
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if (is_string())
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return as_string();
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return alternative;
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}
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String to_string() const
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{
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if (is_string())
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return as_string();
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return serialized<StringBuilder>();
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}
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Optional<IPv4Address> to_ipv4_address() const
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{
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if (!is_string())
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return {};
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return IPv4Address::from_string(as_string());
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}
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int to_int(int default_value = 0) const { return to_i32(default_value); }
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i32 to_i32(i32 default_value = 0) const { return to_number<i32>(default_value); }
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unsigned to_uint(unsigned default_value = 0) const { return to_u32(default_value); }
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u32 to_u32(u32 default_value = 0) const { return to_number<u32>(default_value); }
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bool to_bool(bool default_value = false) const
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{
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if (!is_bool())
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return default_value;
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return as_bool();
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}
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i32 as_i32() const
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{
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ASSERT(is_i32());
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return m_value.as_i32;
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}
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u32 as_u32() const
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{
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ASSERT(is_u32());
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return m_value.as_u32;
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}
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i64 as_i64() const
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{
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ASSERT(is_i64());
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return m_value.as_i64;
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}
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u64 as_u64() const
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{
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ASSERT(is_u64());
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return m_value.as_u64;
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}
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int as_bool() const
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{
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ASSERT(is_bool());
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return m_value.as_bool;
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}
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String as_string() const
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{
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ASSERT(is_string());
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return *m_value.as_string;
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}
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const JsonObject& as_object() const
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{
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ASSERT(is_object());
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return *m_value.as_object;
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}
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const JsonArray& as_array() const
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{
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ASSERT(is_array());
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return *m_value.as_array;
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}
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#if !defined(KERNEL) && !defined(BOOTSTRAPPER)
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double as_double() const
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{
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ASSERT(is_double());
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return m_value.as_double;
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}
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#endif
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Type type() const
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{
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return m_type;
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}
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bool is_null() const { return m_type == Type::Null; }
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bool is_undefined() const { return m_type == Type::Undefined; }
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bool is_bool() const { return m_type == Type::Bool; }
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bool is_string() const { return m_type == Type::String; }
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bool is_i32() const { return m_type == Type::Int32; }
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bool is_u32() const { return m_type == Type::UnsignedInt32; }
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bool is_i64() const { return m_type == Type::Int64; }
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bool is_u64() const { return m_type == Type::UnsignedInt64; }
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#if !defined(KERNEL) && !defined(BOOTSTRAPPER)
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bool is_double() const
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{
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return m_type == Type::Double;
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}
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#endif
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bool is_array() const
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{
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return m_type == Type::Array;
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}
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bool is_object() const { return m_type == Type::Object; }
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bool is_number() const
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{
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switch (m_type) {
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case Type::Int32:
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case Type::UnsignedInt32:
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case Type::Int64:
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case Type::UnsignedInt64:
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#if !defined(KERNEL) && !defined(BOOTSTRAPPER)
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case Type::Double:
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#endif
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return true;
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default:
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return false;
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}
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}
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template<typename T>
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T to_number(T default_value = 0) const
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{
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#if !defined(KERNEL) && !defined(BOOTSTRAPPER)
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if (is_double())
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return (T)as_double();
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#endif
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if (type() == Type::Int32)
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return (T)as_i32();
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if (type() == Type::UnsignedInt32)
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return (T)as_u32();
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if (type() == Type::Int64)
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return (T)as_i64();
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if (type() == Type::UnsignedInt64)
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return (T)as_u64();
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return default_value;
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}
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private:
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void clear();
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void copy_from(const JsonValue&);
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Type m_type { Type::Undefined };
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union {
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StringImpl* as_string { nullptr };
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JsonArray* as_array;
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JsonObject* as_object;
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#if !defined(KERNEL) && !defined(BOOTSTRAPPER)
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double as_double;
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#endif
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i32 as_i32;
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u32 as_u32;
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i64 as_i64;
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u64 as_u64;
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bool as_bool;
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} m_value;
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};
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}
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using AK::JsonValue;
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