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https://github.com/scylladb/scylladb.git
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7064b3a2bf
Migrating from libjsoncpp to rapidjson proved to be beneficial for parsing performance. As a first step, a set of helper functions is provided to ease the migration process.
86 lines
2.7 KiB
C++
86 lines
2.7 KiB
C++
/*
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* Copyright 2019 ScyllaDB
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*/
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/*
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* This file is part of Scylla.
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*
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* See the LICENSE.PROPRIETARY file in the top-level directory for licensing information.
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*/
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#pragma once
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#include <string>
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#include <stdexcept>
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namespace rjson {
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class error : public std::exception {
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std::string _msg;
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public:
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error() = default;
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error(const std::string& msg) : _msg(msg) {}
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virtual const char* what() const noexcept override { return _msg.c_str(); }
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};
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}
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#define RAPIDJSON_HAS_STDSTRING 1
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#define RAPIDJSON_ASSERT(x) do { if (!(x)) throw rjson::error(std::string("JSON error: condition not met: ") + #x); } while (0)
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#include <rapidjson/document.h>
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#include <rapidjson/writer.h>
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#include <rapidjson/stringbuffer.h>
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#include <rapidjson/error/en.h>
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#include <seastar/core/sstring.hh>
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#include "seastarx.hh"
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namespace rjson {
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using allocator = rapidjson::CrtAllocator;
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using encoding = rapidjson::UTF8<>;
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using document = rapidjson::GenericDocument<encoding, allocator>;
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using value = rapidjson::GenericValue<encoding, allocator>;
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using string_ref_type = value::StringRefType;
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using string_buffer = rapidjson::GenericStringBuffer<encoding>;
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using writer = rapidjson::Writer<string_buffer, encoding>;
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using type = rapidjson::Type;
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inline rjson::value null_value() {
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return rjson::value(rapidjson::kNullType);
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}
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inline rjson::value empty_object() {
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return rjson::value(rapidjson::kObjectType);
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}
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inline rjson::value empty_array() {
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return rjson::value(rapidjson::kArrayType);
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}
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inline rjson::value empty_string() {
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return rjson::value(rapidjson::kStringType);
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}
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std::string print(const rjson::value& value);
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rjson::value copy(const rjson::value& value);
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rjson::value parse(const std::string& str);
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rjson::value parse_raw(const char* c_str, size_t size);
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rjson::value from_string(const std::string& str);
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rjson::value from_string(const sstring& str);
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rjson::value* find(rjson::value& value, rjson::string_ref_type name);
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const rjson::value* find(const rjson::value& value, rjson::string_ref_type name);
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rjson::value& get(rjson::value& value, rjson::string_ref_type name);
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const rjson::value& get(const rjson::value& value, rjson::string_ref_type name);
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void set_with_string_name(rjson::value& base, const std::string& name, rjson::value&& member);
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void set_with_string_name(rjson::value& base, const std::string& name, rjson::string_ref_type member);
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void set(rjson::value& base, rjson::string_ref_type name, rjson::value&& member);
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void set(rjson::value& base, rjson::string_ref_type name, rjson::string_ref_type member);
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void push_back(rjson::value& base_array, rjson::value&& item);
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} // end namespace rjson
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namespace std {
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std::ostream& operator<<(std::ostream& os, const rjson::value& v);
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}
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