mirror of
https://github.com/MaskRay/ccls.git
synced 2024-11-26 01:21:57 +00:00
a47fb42e30
Delete virtual bases Reader & Writer
Delete unused MAKE_REFLECT_STRUCT_WRITER_AS_ARRAY
Merge serializers/{json,binary}.hh into serializer.{hh,cc}
MAKE_REFLECT_STRUCT => REFLECT_STRUCT
MAKE_REFLECT_TYPE_PROXY => REFLECT_UNDERLYING
401 lines
12 KiB
C++
401 lines
12 KiB
C++
// Copyright 2017-2018 ccls Authors
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// SPDX-License-Identifier: Apache-2.0
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#pragma once
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#include "utils.hh"
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#include <llvm/Support/Compiler.h>
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#include <macro_map.h>
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#include <rapidjson/fwd.h>
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#include <cassert>
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#include <functional>
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#include <memory>
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#include <optional>
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#include <string>
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#include <string_view>
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#include <type_traits>
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#include <vector>
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namespace llvm {
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class CachedHashStringRef;
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class StringRef;
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}
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namespace ccls {
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enum class SerializeFormat { Binary, Json };
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struct JsonNull {};
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struct JsonReader {
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rapidjson::Value *m;
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std::vector<const char *> path_;
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JsonReader(rapidjson::Value *m) : m(m) {}
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void StartObject() {}
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void EndObject() {}
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void IterArray(std::function<void()> fn);
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void Member(const char *name, std::function<void()> fn);
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bool IsNull();
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std::string GetString();
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std::string GetPath() const;
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};
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struct JsonWriter {
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using W =
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rapidjson::Writer<rapidjson::StringBuffer, rapidjson::UTF8<char>,
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rapidjson::UTF8<char>, rapidjson::CrtAllocator, 0>;
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W *m;
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JsonWriter(W *m) : m(m) {}
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void StartArray();
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void EndArray();
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void StartObject();
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void EndObject();
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void Key(const char *name);
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void Null();
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void Int(int v);
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void String(const char *s);
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void String(const char *s, size_t len);
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};
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struct BinaryReader {
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const char *p_;
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BinaryReader(std::string_view buf) : p_(buf.data()) {}
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template <typename T> T Get() {
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T ret;
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memcpy(&ret, p_, sizeof(T));
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p_ += sizeof(T);
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return ret;
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}
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uint64_t VarUInt() {
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auto x = *reinterpret_cast<const uint8_t *>(p_++);
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if (x < 253)
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return x;
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if (x == 253)
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return Get<uint16_t>();
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if (x == 254)
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return Get<uint32_t>();
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return Get<uint64_t>();
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}
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int64_t VarInt() {
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uint64_t x = VarUInt();
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return int64_t(x >> 1 ^ -(x & 1));
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}
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const char *GetString() {
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const char *ret = p_;
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while (*p_)
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p_++;
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p_++;
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return ret;
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}
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};
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struct BinaryWriter {
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std::string buf_;
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template <typename T> void Pack(T x) {
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auto i = buf_.size();
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buf_.resize(i + sizeof(x));
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memcpy(buf_.data() + i, &x, sizeof(x));
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}
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void VarUInt(uint64_t n) {
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if (n < 253)
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Pack<uint8_t>(n);
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else if (n < 65536) {
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Pack<uint8_t>(253);
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Pack<uint16_t>(n);
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} else if (n < 4294967296) {
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Pack<uint8_t>(254);
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Pack<uint32_t>(n);
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} else {
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Pack<uint8_t>(255);
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Pack<uint64_t>(n);
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}
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}
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void VarInt(int64_t n) { VarUInt(uint64_t(n) << 1 ^ n >> 63); }
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std::string Take() { return std::move(buf_); }
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void String(const char *x) { String(x, strlen(x)); }
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void String(const char *x, size_t len) {
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auto i = buf_.size();
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buf_.resize(i + len + 1);
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memcpy(buf_.data() + i, x, len);
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}
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};
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struct IndexFile;
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#define REFLECT_MEMBER(name) ReflectMember(vis, #name, v.name)
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#define REFLECT_MEMBER2(name, v) ReflectMember(vis, name, v)
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#define REFLECT_UNDERLYING(T) \
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LLVM_ATTRIBUTE_UNUSED inline void Reflect(JsonReader &vis, T &v) { \
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std::underlying_type_t<T> v0; \
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::ccls::Reflect(vis, v0); \
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v = static_cast<T>(v0); \
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} \
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LLVM_ATTRIBUTE_UNUSED inline void Reflect(JsonWriter &vis, T &v) { \
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auto v0 = static_cast<std::underlying_type_t<T>>(v); \
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::ccls::Reflect(vis, v0); \
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}
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#define REFLECT_UNDERLYING_B(T) \
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REFLECT_UNDERLYING(T) \
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LLVM_ATTRIBUTE_UNUSED inline void Reflect(BinaryReader &vis, T &v) { \
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std::underlying_type_t<T> v0; \
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::ccls::Reflect(vis, v0); \
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v = static_cast<T>(v0); \
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} \
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LLVM_ATTRIBUTE_UNUSED inline void Reflect(BinaryWriter &vis, T &v) { \
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auto v0 = static_cast<std::underlying_type_t<T>>(v); \
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::ccls::Reflect(vis, v0); \
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}
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#define _MAPPABLE_REFLECT_MEMBER(name) REFLECT_MEMBER(name);
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#define REFLECT_STRUCT(type, ...) \
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template <typename Vis> void Reflect(Vis &vis, type &v) { \
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ReflectMemberStart(vis); \
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MACRO_MAP(_MAPPABLE_REFLECT_MEMBER, __VA_ARGS__) \
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ReflectMemberEnd(vis); \
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}
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#define _MAPPABLE_REFLECT_ARRAY(name) Reflect(vis, v.name);
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void Reflect(JsonReader &vis, bool &v);
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void Reflect(JsonReader &vis, unsigned char &v);
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void Reflect(JsonReader &vis, short &v);
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void Reflect(JsonReader &vis, unsigned short &v);
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void Reflect(JsonReader &vis, int &v);
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void Reflect(JsonReader &vis, unsigned &v);
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void Reflect(JsonReader &vis, long &v);
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void Reflect(JsonReader &vis, unsigned long &v);
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void Reflect(JsonReader &vis, long long &v);
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void Reflect(JsonReader &vis, unsigned long long &v);
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void Reflect(JsonReader &vis, double &v);
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void Reflect(JsonReader &vis, const char *&v);
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void Reflect(JsonReader &vis, std::string &v);
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void Reflect(JsonWriter &vis, bool &v);
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void Reflect(JsonWriter &vis, unsigned char &v);
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void Reflect(JsonWriter &vis, short &v);
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void Reflect(JsonWriter &vis, unsigned short &v);
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void Reflect(JsonWriter &vis, int &v);
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void Reflect(JsonWriter &vis, unsigned &v);
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void Reflect(JsonWriter &vis, long &v);
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void Reflect(JsonWriter &vis, unsigned long &v);
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void Reflect(JsonWriter &vis, long long &v);
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void Reflect(JsonWriter &vis, unsigned long long &v);
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void Reflect(JsonWriter &vis, double &v);
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void Reflect(JsonWriter &vis, const char *&v);
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void Reflect(JsonWriter &vis, std::string &v);
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void Reflect(BinaryReader &vis, bool &v);
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void Reflect(BinaryReader &vis, unsigned char &v);
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void Reflect(BinaryReader &vis, short &v);
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void Reflect(BinaryReader &vis, unsigned short &v);
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void Reflect(BinaryReader &vis, int &v);
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void Reflect(BinaryReader &vis, unsigned &v);
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void Reflect(BinaryReader &vis, long &v);
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void Reflect(BinaryReader &vis, unsigned long &v);
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void Reflect(BinaryReader &vis, long long &v);
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void Reflect(BinaryReader &vis, unsigned long long &v);
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void Reflect(BinaryReader &vis, double &v);
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void Reflect(BinaryReader &vis, const char *&v);
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void Reflect(BinaryReader &vis, std::string &v);
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void Reflect(BinaryWriter &vis, bool &v);
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void Reflect(BinaryWriter &vis, unsigned char &v);
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void Reflect(BinaryWriter &vis, short &v);
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void Reflect(BinaryWriter &vis, unsigned short &v);
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void Reflect(BinaryWriter &vis, int &v);
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void Reflect(BinaryWriter &vis, unsigned &v);
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void Reflect(BinaryWriter &vis, long &v);
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void Reflect(BinaryWriter &vis, unsigned long &v);
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void Reflect(BinaryWriter &vis, long long &v);
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void Reflect(BinaryWriter &vis, unsigned long long &v);
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void Reflect(BinaryWriter &vis, double &v);
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void Reflect(BinaryWriter &vis, const char *&v);
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void Reflect(BinaryWriter &vis, std::string &v);
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void Reflect(JsonReader &vis, JsonNull &v);
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void Reflect(JsonWriter &vis, JsonNull &v);
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void Reflect(JsonReader &vis, SerializeFormat &v);
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void Reflect(JsonWriter &vis, SerializeFormat &v);
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void Reflect(JsonWriter &vis, std::string_view &v);
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//// Type constructors
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// ReflectMember std::optional<T> is used to represent TypeScript optional
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// properties (in `key: value` context). Reflect std::optional<T> is used for a
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// different purpose, whether an object is nullable (possibly in `value`
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// context).
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template <typename T> void Reflect(JsonReader &vis, std::optional<T> &v) {
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if (!vis.IsNull()) {
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v.emplace();
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Reflect(vis, *v);
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}
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}
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template <typename T> void Reflect(JsonWriter &vis, std::optional<T> &v) {
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if (v)
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Reflect(vis, *v);
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else
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vis.Null();
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}
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template <typename T> void Reflect(BinaryReader &vis, std::optional<T> &v) {
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if (*vis.p_++) {
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v.emplace();
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Reflect(vis, *v);
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}
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}
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template <typename T> void Reflect(BinaryWriter &vis, std::optional<T> &v) {
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if (v) {
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vis.Pack<unsigned char>(1);
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Reflect(vis, *v);
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} else {
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vis.Pack<unsigned char>(0);
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}
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}
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// The same as std::optional
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template <typename T> void Reflect(JsonReader &vis, Maybe<T> &v) {
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if (!vis.IsNull())
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Reflect(vis, *v);
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}
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template <typename T> void Reflect(JsonWriter &vis, Maybe<T> &v) {
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if (v)
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Reflect(vis, *v);
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else
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vis.Null();
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}
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template <typename T> void Reflect(BinaryReader &vis, Maybe<T> &v) {
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if (*vis.p_++)
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Reflect(vis, *v);
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}
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template <typename T> void Reflect(BinaryWriter &vis, Maybe<T> &v) {
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if (v) {
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vis.Pack<unsigned char>(1);
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Reflect(vis, *v);
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} else {
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vis.Pack<unsigned char>(0);
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}
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}
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template <typename T>
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void ReflectMember(JsonWriter &vis, const char *name, std::optional<T> &v) {
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// For TypeScript std::optional property key?: value in the spec,
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// We omit both key and value if value is std::nullopt (null) for JsonWriter
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// to reduce output. But keep it for other serialization formats.
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if (v) {
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vis.Key(name);
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Reflect(vis, *v);
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}
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}
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template <typename T>
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void ReflectMember(BinaryWriter &vis, const char *, std::optional<T> &v) {
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Reflect(vis, v);
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}
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// The same as std::optional
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template <typename T>
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void ReflectMember(JsonWriter &vis, const char *name, Maybe<T> &v) {
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if (v.Valid()) {
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vis.Key(name);
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Reflect(vis, v);
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}
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}
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template <typename T>
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void ReflectMember(BinaryWriter &vis, const char *, Maybe<T> &v) {
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Reflect(vis, v);
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}
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template <typename L, typename R>
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void Reflect(JsonReader &vis, std::pair<L, R> &v) {
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vis.Member("L", [&]() { Reflect(vis, v.first); });
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vis.Member("R", [&]() { Reflect(vis, v.second); });
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}
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template <typename L, typename R>
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void Reflect(JsonWriter &vis, std::pair<L, R> &v) {
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vis.StartObject();
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ReflectMember(vis, "L", v.first);
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ReflectMember(vis, "R", v.second);
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vis.EndObject();
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}
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template <typename L, typename R>
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void Reflect(BinaryReader &vis, std::pair<L, R> &v) {
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Reflect(vis, v.first);
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Reflect(vis, v.second);
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}
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template <typename L, typename R>
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void Reflect(BinaryWriter &vis, std::pair<L, R> &v) {
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Reflect(vis, v.first);
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Reflect(vis, v.second);
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}
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// std::vector
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template <typename T> void Reflect(JsonReader &vis, std::vector<T> &v) {
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vis.IterArray([&]() {
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v.emplace_back();
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Reflect(vis, v.back());
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});
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}
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template <typename T> void Reflect(JsonWriter &vis, std::vector<T> &v) {
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vis.StartArray();
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for (auto &it : v)
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Reflect(vis, it);
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vis.EndArray();
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}
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template <typename T> void Reflect(BinaryReader &vis, std::vector<T> &v) {
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for (auto n = vis.VarUInt(); n; n--) {
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v.emplace_back();
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Reflect(vis, v.back());
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}
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}
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template <typename T> void Reflect(BinaryWriter &vis, std::vector<T> &v) {
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vis.VarUInt(v.size());
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for (auto &it : v)
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Reflect(vis, it);
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}
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// ReflectMember
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template <typename T> void ReflectMemberStart(T &) {}
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inline void ReflectMemberStart(JsonWriter &vis) { vis.StartObject(); }
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template <typename T> void ReflectMemberEnd(T &) {}
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inline void ReflectMemberEnd(JsonWriter &vis) { vis.EndObject(); }
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template <typename T> void ReflectMember(JsonReader &vis, const char *name, T &v) {
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vis.Member(name, [&]() { Reflect(vis, v); });
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}
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template <typename T> void ReflectMember(JsonWriter &vis, const char *name, T &v) {
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vis.Key(name);
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Reflect(vis, v);
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}
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template <typename T> void ReflectMember(BinaryReader &vis, const char *, T &v) {
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Reflect(vis, v);
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}
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template <typename T> void ReflectMember(BinaryWriter &vis, const char *, T &v) {
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Reflect(vis, v);
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}
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// API
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const char *Intern(llvm::StringRef str);
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llvm::CachedHashStringRef InternH(llvm::StringRef str);
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std::string Serialize(SerializeFormat format, IndexFile &file);
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std::unique_ptr<IndexFile>
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Deserialize(SerializeFormat format, const std::string &path,
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const std::string &serialized_index_content,
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const std::string &file_content,
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std::optional<int> expected_version);
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} // namespace ccls
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