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tdlib-fork/tdutils/td/utils/tl_helpers.h
levlam 6f33dec5bb Move BufferSlice an Timestamp storer/parser to their headers.
GitOrigin-RevId: 9aa62396ea26c8f3b6758262e94986dbd57ac277
2018-03-14 23:41:14 +03:00

204 lines
5.3 KiB
C++

//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2018
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#pragma once
#include "td/utils/common.h"
#include "td/utils/logging.h"
#include "td/utils/misc.h"
#include "td/utils/Slice.h"
#include "td/utils/StackAllocator.h"
#include "td/utils/Status.h"
#include "td/utils/tl_parsers.h"
#include "td/utils/tl_storers.h"
#include <type_traits>
#include <unordered_set>
#define BEGIN_STORE_FLAGS() \
uint32 flags_store = 0; \
uint32 bit_offset_store = 0
#define STORE_FLAG(flag) \
flags_store |= (flag) << bit_offset_store; \
bit_offset_store++
#define END_STORE_FLAGS() \
CHECK(bit_offset_store < 31); \
td::store(flags_store, storer)
#define BEGIN_PARSE_FLAGS() \
uint32 flags_parse; \
uint32 bit_offset_parse = 0; \
td::parse(flags_parse, parser)
#define PARSE_FLAG(flag) \
flag = ((flags_parse >> bit_offset_parse) & 1) != 0; \
bit_offset_parse++
#define END_PARSE_FLAGS() \
CHECK(bit_offset_parse < 31); \
CHECK((flags_parse & ~((1 << bit_offset_parse) - 1)) == 0) << flags_parse << " " << bit_offset_parse;
namespace td {
template <class StorerT>
void store(bool x, StorerT &storer) {
storer.store_binary(static_cast<int32>(x));
}
template <class ParserT>
void parse(bool &x, ParserT &parser) {
x = parser.fetch_int() != 0;
}
template <class StorerT>
void store(int32 x, StorerT &storer) {
storer.store_binary(x);
}
template <class ParserT>
void parse(int32 &x, ParserT &parser) {
x = parser.fetch_int();
}
template <class StorerT>
void store(uint32 x, StorerT &storer) {
storer.store_binary(x);
}
template <class ParserT>
void parse(uint32 &x, ParserT &parser) {
x = static_cast<uint32>(parser.fetch_int());
}
template <class StorerT>
void store(int64 x, StorerT &storer) {
storer.store_binary(x);
}
template <class ParserT>
void parse(int64 &x, ParserT &parser) {
x = parser.fetch_long();
}
template <class StorerT>
void store(uint64 x, StorerT &storer) {
storer.store_binary(x);
}
template <class ParserT>
void parse(uint64 &x, ParserT &parser) {
x = static_cast<uint64>(parser.fetch_long());
}
template <class StorerT>
void store(double x, StorerT &storer) {
storer.store_binary(x);
}
template <class ParserT>
void parse(double &x, ParserT &parser) {
x = parser.fetch_double();
}
template <class StorerT>
void store(Slice x, StorerT &storer) {
storer.store_string(x);
}
template <class StorerT>
void store(const string &x, StorerT &storer) {
storer.store_string(x);
}
template <class ParserT>
void parse(string &x, ParserT &parser) {
x = parser.template fetch_string<string>();
}
template <class T, class StorerT>
void store(const vector<T> &vec, StorerT &storer) {
storer.store_binary(narrow_cast<int32>(vec.size()));
for (auto &val : vec) {
store(val, storer);
}
}
template <class T, class ParserT>
void parse(vector<T> &vec, ParserT &parser) {
uint32 size = parser.fetch_int();
if (parser.get_left_len() < size) {
parser.set_error("Wrong vector length");
return;
}
vec = vector<T>(size);
for (auto &val : vec) {
parse(val, parser);
}
}
template <class Key, class Hash, class KeyEqual, class Allocator, class StorerT>
void store(const std::unordered_set<Key, Hash, KeyEqual, Allocator> &s, StorerT &storer) {
storer.store_binary(narrow_cast<int32>(s.size()));
for (auto &val : s) {
store(val, storer);
}
}
template <class Key, class Hash, class KeyEqual, class Allocator, class ParserT>
void parse(std::unordered_set<Key, Hash, KeyEqual, Allocator> &s, ParserT &parser) {
uint32 size = parser.fetch_int();
if (parser.get_left_len() < size) {
parser.set_error("Wrong set length");
return;
}
s.clear();
Key val;
for (uint32 i = 0; i < size; i++) {
parse(val, parser);
s.insert(std::move(val));
}
}
template <class T, class StorerT>
std::enable_if_t<std::is_enum<T>::value> store(const T &val, StorerT &storer) {
store(static_cast<int32>(val), storer);
}
template <class T, class ParserT>
std::enable_if_t<std::is_enum<T>::value> parse(T &val, ParserT &parser) {
int32 result;
parse(result, parser);
val = static_cast<T>(result);
}
template <class T, class StorerT>
std::enable_if_t<!std::is_enum<T>::value> store(const T &val, StorerT &storer) {
val.store(storer);
}
template <class T, class ParserT>
std::enable_if_t<!std::is_enum<T>::value> parse(T &val, ParserT &parser) {
val.parse(parser);
}
template <class T>
string serialize(const T &object) {
TlStorerCalcLength calc_length;
store(object, calc_length);
size_t length = calc_length.get_length();
string key(length, '\0');
if (!is_aligned_pointer<4>(key.data())) {
auto ptr = StackAllocator::alloc(length);
MutableSlice data = ptr.as_slice();
TlStorerUnsafe storer(data.begin());
store(object, storer);
key.assign(data.begin(), data.size());
} else {
MutableSlice data = key;
TlStorerUnsafe storer(data.begin());
store(object, storer);
}
return key;
}
template <class T>
TD_WARN_UNUSED_RESULT Status unserialize(T &object, Slice data) {
TlParser parser(data);
parse(object, parser);
parser.fetch_end();
return parser.get_status();
}
} // namespace td