mirror of
https://github.com/RGBCube/serenity
synced 2025-07-28 00:47:45 +00:00
Everywhere: Make JSON serialization fallible
This allows us to eliminate a major source of infallible allocation in the Kernel, as well as lay down the groundwork for OOM fallibility in userland.
This commit is contained in:
Idan Horowitz
Andreas Kling
parent
6682afb5d4
commit
feb00b7105
18 changed files with 837 additions and 592 deletions
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@ -85,8 +85,9 @@ private:
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template<typename Builder>
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inline void JsonArray::serialize(Builder& builder) const
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{
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JsonArraySerializer serializer { builder };
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for_each([&](auto& value) { serializer.add(value); });
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auto serializer = MUST(JsonArraySerializer<>::try_create(builder));
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for_each([&](auto& value) { MUST(serializer.add(value)); });
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MUST(serializer.finish());
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}
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template<typename Builder>
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@ -1,132 +1,216 @@
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/*
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* Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
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* Copyright (c) 2022, Idan Horowitz <idan.horowitz@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/JsonValue.h>
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#include <AK/Error.h>
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#include <AK/Try.h>
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#ifndef KERNEL
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# include <AK/JsonValue.h>
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#endif
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namespace AK {
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template<typename Builder>
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inline constexpr bool IsLegacyBuilder = requires(Builder builder) { builder.try_append('\0'); };
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template<typename Builder = void>
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class JsonObjectSerializer;
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template<typename Builder>
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template<typename Builder = void>
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class JsonArraySerializer {
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public:
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explicit JsonArraySerializer(Builder& builder)
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: m_builder(builder)
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static ErrorOr<JsonArraySerializer> try_create(Builder& builder)
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{
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if constexpr (IsLegacyBuilder<Builder>)
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TRY(builder.try_append('['));
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else
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TRY(builder.append('['));
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return JsonArraySerializer { builder };
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}
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JsonArraySerializer(JsonArraySerializer&& other)
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: m_builder(other.m_builder)
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, m_empty(other.m_empty)
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, m_finished(exchange(other.m_finished, true))
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{
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(void)m_builder.append('[');
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}
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JsonArraySerializer(const JsonArraySerializer&) = delete;
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JsonArraySerializer(JsonArraySerializer&&) = delete;
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~JsonArraySerializer()
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{
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if (!m_finished)
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finish();
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VERIFY(m_finished);
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}
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#ifndef KERNEL
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void add(const JsonValue& value)
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ErrorOr<void> add(const JsonValue& value)
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{
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begin_item();
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TRY(begin_item());
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value.serialize(m_builder);
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return {};
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}
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#endif
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void add(StringView value)
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ErrorOr<void> add(StringView value)
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{
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begin_item();
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(void)m_builder.append('"');
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(void)m_builder.append_escaped_for_json(value);
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(void)m_builder.append('"');
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TRY(begin_item());
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if constexpr (IsLegacyBuilder<Builder>) {
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TRY(m_builder.try_append('"'));
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TRY(m_builder.try_append_escaped_for_json(value));
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TRY(m_builder.try_append('"'));
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} else {
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TRY(m_builder.append('"'));
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TRY(m_builder.append_escaped_for_json(value));
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TRY(m_builder.append('"'));
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}
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return {};
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}
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void add(const String& value)
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#ifndef KERNEL
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ErrorOr<void> add(const String& value)
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{
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begin_item();
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(void)m_builder.append('"');
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(void)m_builder.append_escaped_for_json(value);
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(void)m_builder.append('"');
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TRY(begin_item());
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if constexpr (IsLegacyBuilder<Builder>) {
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TRY(m_builder.try_append('"'));
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TRY(m_builder.try_append_escaped_for_json(value));
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TRY(m_builder.try_append('"'));
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} else {
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TRY(m_builder.append('"'));
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TRY(m_builder.append_escaped_for_json(value));
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TRY(m_builder.append('"'));
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}
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return {};
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}
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#endif
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ErrorOr<void> add(const char* value)
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{
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TRY(begin_item());
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if constexpr (IsLegacyBuilder<Builder>) {
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TRY(m_builder.try_append('"'));
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TRY(m_builder.try_append_escaped_for_json(value));
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TRY(m_builder.try_append('"'));
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} else {
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TRY(m_builder.append('"'));
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TRY(m_builder.append_escaped_for_json(value));
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TRY(m_builder.append('"'));
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}
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return {};
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}
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void add(const char* value)
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ErrorOr<void> add(bool value)
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{
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begin_item();
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(void)m_builder.append('"');
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(void)m_builder.append_escaped_for_json(value);
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(void)m_builder.append('"');
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TRY(begin_item());
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if constexpr (IsLegacyBuilder<Builder>)
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TRY(m_builder.try_append(value ? "true"sv : "false"sv));
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else
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TRY(m_builder.append(value ? "true"sv : "false"sv));
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return {};
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}
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void add(bool value)
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ErrorOr<void> add(int value)
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{
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begin_item();
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(void)m_builder.append(value ? "true"sv : "false"sv);
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TRY(begin_item());
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if constexpr (IsLegacyBuilder<Builder>)
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TRY(m_builder.try_appendff("{}", value));
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else
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TRY(m_builder.appendff("{}", value));
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return {};
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}
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void add(int value)
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ErrorOr<void> add(unsigned value)
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{
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begin_item();
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(void)m_builder.appendff("{}", value);
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TRY(begin_item());
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if constexpr (IsLegacyBuilder<Builder>)
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TRY(m_builder.try_appendff("{}", value));
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else
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TRY(m_builder.appendff("{}", value));
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return {};
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}
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void add(unsigned value)
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ErrorOr<void> add(long value)
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{
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begin_item();
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(void)m_builder.appendff("{}", value);
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TRY(begin_item());
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if constexpr (IsLegacyBuilder<Builder>)
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TRY(m_builder.try_appendff("{}", value));
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else
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TRY(m_builder.appendff("{}", value));
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return {};
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}
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void add(long value)
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ErrorOr<void> add(long unsigned value)
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{
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begin_item();
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(void)m_builder.appendff("{}", value);
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TRY(begin_item());
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if constexpr (IsLegacyBuilder<Builder>)
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TRY(m_builder.try_appendff("{}", value));
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else
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TRY(m_builder.appendff("{}", value));
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return {};
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}
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void add(long unsigned value)
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ErrorOr<void> add(long long value)
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{
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begin_item();
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(void)m_builder.appendff("{}", value);
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TRY(begin_item());
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if constexpr (IsLegacyBuilder<Builder>)
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TRY(m_builder.try_appendff("{}", value));
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else
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TRY(m_builder.appendff("{}", value));
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return {};
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}
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void add(long long value)
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ErrorOr<void> add(long long unsigned value)
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{
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begin_item();
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(void)m_builder.appendff("{}", value);
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TRY(begin_item());
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if constexpr (IsLegacyBuilder<Builder>)
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TRY(m_builder.try_appendff("{}", value));
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else
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TRY(m_builder.appendff("{}", value));
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return {};
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}
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void add(long long unsigned value)
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ErrorOr<JsonArraySerializer<Builder>> add_array()
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{
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begin_item();
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(void)m_builder.appendff("{}", value);
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}
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JsonArraySerializer<Builder> add_array()
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{
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begin_item();
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return JsonArraySerializer(m_builder);
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TRY(begin_item());
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return JsonArraySerializer::try_create(m_builder);
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}
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// Implemented in JsonObjectSerializer.h
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JsonObjectSerializer<Builder> add_object();
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ErrorOr<JsonObjectSerializer<Builder>> add_object();
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void finish()
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ErrorOr<void> finish()
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{
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VERIFY(!m_finished);
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m_finished = true;
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(void)m_builder.append(']');
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if constexpr (IsLegacyBuilder<Builder>)
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TRY(m_builder.try_append(']'));
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else
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TRY(m_builder.append(']'));
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return {};
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}
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private:
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void begin_item()
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explicit JsonArraySerializer(Builder& builder)
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: m_builder(builder)
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{
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if (!m_empty)
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(void)m_builder.append(',');
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}
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ErrorOr<void> begin_item()
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{
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VERIFY(!m_finished);
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if (!m_empty) {
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if constexpr (IsLegacyBuilder<Builder>)
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TRY(m_builder.try_append(','));
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else
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TRY(m_builder.append(','));
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}
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m_empty = false;
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return {};
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}
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Builder& m_builder;
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@ -134,6 +218,16 @@ private:
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bool m_finished { false };
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};
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// Template magic to allow for JsonArraySerializer<>::try_create(...) - Blame CxByte
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template<>
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struct JsonArraySerializer<void> {
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template<typename Builder>
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static ErrorOr<JsonArraySerializer<Builder>> try_create(Builder& builder)
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{
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return JsonArraySerializer<Builder>::try_create(builder);
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}
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};
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}
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using AK::JsonArraySerializer;
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@ -162,10 +162,11 @@ private:
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template<typename Builder>
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inline void JsonObject::serialize(Builder& builder) const
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{
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JsonObjectSerializer serializer { builder };
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auto serializer = MUST(JsonObjectSerializer<>::try_create(builder));
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for_each_member([&](auto& key, auto& value) {
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serializer.add(key, value);
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MUST(serializer.add(key, value));
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});
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MUST(serializer.finish());
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}
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template<typename Builder>
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@ -1,12 +1,15 @@
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/*
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* Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
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* Copyright (c) 2022, Idan Horowitz <idan.horowitz@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Error.h>
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#include <AK/JsonArraySerializer.h>
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#include <AK/Try.h>
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#ifndef KERNEL
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# include <AK/JsonValue.h>
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@ -17,132 +20,217 @@ namespace AK {
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template<typename Builder>
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class JsonObjectSerializer {
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public:
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explicit JsonObjectSerializer(Builder& builder)
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: m_builder(builder)
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static ErrorOr<JsonObjectSerializer> try_create(Builder& builder)
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{
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if constexpr (IsLegacyBuilder<Builder>)
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TRY(builder.try_append('{'));
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else
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TRY(builder.append('{'));
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return JsonObjectSerializer { builder };
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}
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JsonObjectSerializer(JsonObjectSerializer&& other)
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: m_builder(other.m_builder)
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, m_empty(other.m_empty)
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, m_finished(exchange(other.m_finished, true))
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{
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(void)m_builder.append('{');
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}
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JsonObjectSerializer(const JsonObjectSerializer&) = delete;
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JsonObjectSerializer(JsonObjectSerializer&&) = delete;
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~JsonObjectSerializer()
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{
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if (!m_finished)
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finish();
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VERIFY(m_finished);
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}
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#ifndef KERNEL
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void add(StringView key, const JsonValue& value)
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ErrorOr<void> add(StringView key, const JsonValue& value)
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{
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begin_item(key);
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TRY(begin_item(key));
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value.serialize(m_builder);
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return {};
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}
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#endif
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void add(StringView key, StringView value)
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ErrorOr<void> add(StringView key, StringView value)
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{
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begin_item(key);
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(void)m_builder.append('"');
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(void)m_builder.append_escaped_for_json(value);
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(void)m_builder.append('"');
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}
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void add(StringView key, const String& value)
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{
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begin_item(key);
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(void)m_builder.append('"');
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(void)m_builder.append_escaped_for_json(value);
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(void)m_builder.append('"');
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}
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void add(StringView key, const char* value)
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{
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begin_item(key);
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(void)m_builder.append('"');
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(void)m_builder.append_escaped_for_json(value);
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(void)m_builder.append('"');
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}
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void add(StringView key, bool value)
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{
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begin_item(key);
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(void)m_builder.append(value ? "true" : "false");
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}
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void add(StringView key, int value)
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{
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begin_item(key);
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(void)m_builder.appendff("{}", value);
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}
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void add(StringView key, unsigned value)
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{
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begin_item(key);
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(void)m_builder.appendff("{}", value);
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}
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void add(StringView key, long value)
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{
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begin_item(key);
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(void)m_builder.appendff("{}", value);
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}
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void add(StringView key, long unsigned value)
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{
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begin_item(key);
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(void)m_builder.appendff("{}", value);
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}
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void add(StringView key, long long value)
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{
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begin_item(key);
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(void)m_builder.appendff("{}", value);
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}
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void add(StringView key, long long unsigned value)
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{
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begin_item(key);
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(void)m_builder.appendff("{}", value);
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TRY(begin_item(key));
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if constexpr (IsLegacyBuilder<Builder>) {
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TRY(m_builder.try_append('"'));
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TRY(m_builder.try_append_escaped_for_json(value));
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TRY(m_builder.try_append('"'));
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} else {
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TRY(m_builder.append('"'));
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TRY(m_builder.append_escaped_for_json(value));
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TRY(m_builder.append('"'));
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}
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return {};
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}
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#ifndef KERNEL
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void add(StringView key, double value)
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ErrorOr<void> add(StringView key, const String& value)
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{
|
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begin_item(key);
|
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(void)m_builder.appendff("{}", value);
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TRY(begin_item(key));
|
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if constexpr (IsLegacyBuilder<Builder>) {
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TRY(m_builder.try_append('"'));
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TRY(m_builder.try_append_escaped_for_json(value));
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TRY(m_builder.try_append('"'));
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} else {
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TRY(m_builder.append('"'));
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TRY(m_builder.append_escaped_for_json(value));
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TRY(m_builder.append('"'));
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}
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return {};
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}
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#endif
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JsonArraySerializer<Builder> add_array(StringView key)
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ErrorOr<void> add(StringView key, const char* value)
|
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{
|
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begin_item(key);
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return JsonArraySerializer(m_builder);
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TRY(begin_item(key));
|
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if constexpr (IsLegacyBuilder<Builder>) {
|
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TRY(m_builder.try_append('"'));
|
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TRY(m_builder.try_append_escaped_for_json(value));
|
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TRY(m_builder.try_append('"'));
|
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} else {
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TRY(m_builder.append('"'));
|
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TRY(m_builder.append_escaped_for_json(value));
|
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TRY(m_builder.append('"'));
|
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}
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return {};
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}
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|
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JsonObjectSerializer<Builder> add_object(StringView key)
|
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ErrorOr<void> add(StringView key, bool value)
|
||||
{
|
||||
begin_item(key);
|
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return JsonObjectSerializer(m_builder);
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TRY(begin_item(key));
|
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if constexpr (IsLegacyBuilder<Builder>)
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TRY(m_builder.try_append(value ? "true" : "false"));
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else
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TRY(m_builder.append(value ? "true" : "false"));
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return {};
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}
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void finish()
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ErrorOr<void> add(StringView key, int value)
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||||
{
|
||||
TRY(begin_item(key));
|
||||
if constexpr (IsLegacyBuilder<Builder>)
|
||||
TRY(m_builder.try_appendff("{}", value));
|
||||
else
|
||||
TRY(m_builder.appendff("{}", value));
|
||||
return {};
|
||||
}
|
||||
|
||||
ErrorOr<void> add(StringView key, unsigned value)
|
||||
{
|
||||
TRY(begin_item(key));
|
||||
if constexpr (IsLegacyBuilder<Builder>)
|
||||
TRY(m_builder.try_appendff("{}", value));
|
||||
else
|
||||
TRY(m_builder.appendff("{}", value));
|
||||
return {};
|
||||
}
|
||||
|
||||
ErrorOr<void> add(StringView key, long value)
|
||||
{
|
||||
TRY(begin_item(key));
|
||||
if constexpr (IsLegacyBuilder<Builder>)
|
||||
TRY(m_builder.try_appendff("{}", value));
|
||||
else
|
||||
TRY(m_builder.appendff("{}", value));
|
||||
return {};
|
||||
}
|
||||
|
||||
ErrorOr<void> add(StringView key, long unsigned value)
|
||||
{
|
||||
TRY(begin_item(key));
|
||||
if constexpr (IsLegacyBuilder<Builder>)
|
||||
TRY(m_builder.try_appendff("{}", value));
|
||||
else
|
||||
TRY(m_builder.appendff("{}", value));
|
||||
return {};
|
||||
}
|
||||
|
||||
ErrorOr<void> add(StringView key, long long value)
|
||||
{
|
||||
TRY(begin_item(key));
|
||||
if constexpr (IsLegacyBuilder<Builder>)
|
||||
TRY(m_builder.try_appendff("{}", value));
|
||||
else
|
||||
TRY(m_builder.appendff("{}", value));
|
||||
return {};
|
||||
}
|
||||
|
||||
ErrorOr<void> add(StringView key, long long unsigned value)
|
||||
{
|
||||
TRY(begin_item(key));
|
||||
if constexpr (IsLegacyBuilder<Builder>)
|
||||
TRY(m_builder.try_appendff("{}", value));
|
||||
else
|
||||
TRY(m_builder.appendff("{}", value));
|
||||
return {};
|
||||
}
|
||||
|
||||
#ifndef KERNEL
|
||||
ErrorOr<void> add(StringView key, double value)
|
||||
{
|
||||
TRY(begin_item(key));
|
||||
if constexpr (IsLegacyBuilder<Builder>)
|
||||
TRY(m_builder.try_appendff("{}", value));
|
||||
else
|
||||
TRY(m_builder.appendff("{}", value));
|
||||
return {};
|
||||
}
|
||||
#endif
|
||||
|
||||
ErrorOr<JsonArraySerializer<Builder>> add_array(StringView key)
|
||||
{
|
||||
TRY(begin_item(key));
|
||||
return JsonArraySerializer<Builder>::try_create(m_builder);
|
||||
}
|
||||
|
||||
ErrorOr<JsonObjectSerializer<Builder>> add_object(StringView key)
|
||||
{
|
||||
TRY(begin_item(key));
|
||||
return JsonObjectSerializer::try_create(m_builder);
|
||||
}
|
||||
|
||||
ErrorOr<void> finish()
|
||||
{
|
||||
VERIFY(!m_finished);
|
||||
m_finished = true;
|
||||
(void)m_builder.append('}');
|
||||
if constexpr (IsLegacyBuilder<Builder>)
|
||||
TRY(m_builder.try_append('}'));
|
||||
else
|
||||
TRY(m_builder.append('}'));
|
||||
return {};
|
||||
}
|
||||
|
||||
private:
|
||||
void begin_item(StringView key)
|
||||
explicit JsonObjectSerializer(Builder& builder)
|
||||
: m_builder(builder)
|
||||
{
|
||||
if (!m_empty)
|
||||
(void)m_builder.append(',');
|
||||
}
|
||||
|
||||
ErrorOr<void> begin_item(StringView key)
|
||||
{
|
||||
VERIFY(!m_finished);
|
||||
if (!m_empty) {
|
||||
if constexpr (IsLegacyBuilder<Builder>)
|
||||
TRY(m_builder.try_append(','));
|
||||
else
|
||||
TRY(m_builder.append(','));
|
||||
}
|
||||
m_empty = false;
|
||||
|
||||
(void)m_builder.append('"');
|
||||
(void)m_builder.append_escaped_for_json(key);
|
||||
(void)m_builder.append("\":");
|
||||
if constexpr (IsLegacyBuilder<Builder>) {
|
||||
TRY(m_builder.try_append('"'));
|
||||
TRY(m_builder.try_append_escaped_for_json(key));
|
||||
TRY(m_builder.try_append("\":"));
|
||||
} else {
|
||||
TRY(m_builder.append('"'));
|
||||
TRY(m_builder.append_escaped_for_json(key));
|
||||
TRY(m_builder.append("\":"));
|
||||
}
|
||||
return {};
|
||||
}
|
||||
|
||||
Builder& m_builder;
|
||||
|
|
@ -150,11 +238,21 @@ private:
|
|||
bool m_finished { false };
|
||||
};
|
||||
|
||||
// Template magic to allow for JsonObjectSerializer<>::try_create(...) - Blame CxByte
|
||||
template<>
|
||||
struct JsonObjectSerializer<void> {
|
||||
template<typename Builder>
|
||||
static ErrorOr<JsonObjectSerializer<Builder>> try_create(Builder& builder)
|
||||
{
|
||||
return JsonObjectSerializer<Builder>::try_create(builder);
|
||||
}
|
||||
};
|
||||
|
||||
template<typename Builder>
|
||||
JsonObjectSerializer<Builder> JsonArraySerializer<Builder>::add_object()
|
||||
ErrorOr<JsonObjectSerializer<Builder>> JsonArraySerializer<Builder>::add_object()
|
||||
{
|
||||
begin_item();
|
||||
return JsonObjectSerializer(m_builder);
|
||||
TRY(begin_item());
|
||||
return JsonObjectSerializer<Builder>::try_create(m_builder);
|
||||
}
|
||||
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue