145 lines
2.9 KiB
C++
145 lines
2.9 KiB
C++
//
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// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2019
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#pragma once
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#include "td/tl/TlObject.h"
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#include "td/utils/UInt.h"
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#include <cstdint>
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#include <string>
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#include <vector>
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namespace td {
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template <class Func, std::int32_t constructor_id>
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class TlFetchBoxed {
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public:
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template <class ParserT>
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static auto parse(ParserT &p) -> decltype(Func::parse(p)) {
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if (p.fetch_int() != constructor_id) {
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p.set_error("Wrong constructor found");
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return decltype(Func::parse(p))();
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}
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return Func::parse(p);
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}
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};
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class TlFetchTrue {
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public:
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template <class ParserT>
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static bool parse(ParserT &p) {
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return true;
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}
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};
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class TlFetchBool {
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public:
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template <class ParserT>
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static bool parse(ParserT &p) {
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constexpr std::int32_t ID_BOOL_FALSE = 0xbc799737;
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constexpr std::int32_t ID_BOOL_TRUE = 0x997275b5;
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std::int32_t c = p.fetch_int();
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if (c == ID_BOOL_TRUE) {
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return true;
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}
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if (c != ID_BOOL_FALSE) {
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p.set_error("Bool expected");
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}
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return false;
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}
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};
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class TlFetchInt {
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public:
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template <class ParserT>
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static std::int32_t parse(ParserT &p) {
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return p.fetch_int();
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}
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};
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class TlFetchLong {
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public:
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template <class ParserT>
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static std::int64_t parse(ParserT &p) {
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return p.fetch_long();
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}
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};
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class TlFetchDouble {
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public:
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template <class ParserT>
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static double parse(ParserT &p) {
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return p.fetch_double();
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}
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};
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class TlFetchInt128 {
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public:
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template <class ParserT>
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static UInt128 parse(ParserT &p) {
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return p.template fetch_binary<UInt128>();
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}
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};
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class TlFetchInt256 {
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public:
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template <class ParserT>
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static UInt256 parse(ParserT &p) {
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return p.template fetch_binary<UInt256>();
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}
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};
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template <class T>
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class TlFetchString {
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public:
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template <class ParserT>
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static T parse(ParserT &p) {
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return p.template fetch_string<T>();
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}
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};
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template <class T>
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class TlFetchBytes {
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public:
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template <class ParserT>
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static T parse(ParserT &p) {
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return p.template fetch_string<T>();
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}
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};
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template <class Func>
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class TlFetchVector {
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public:
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template <class ParserT>
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static auto parse(ParserT &p) -> std::vector<decltype(Func::parse(p))> {
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const std::uint32_t multiplicity = p.fetch_int();
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std::vector<decltype(Func::parse(p))> v;
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if (p.get_left_len() < multiplicity) {
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p.set_error("Wrong vector length");
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} else {
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v.reserve(multiplicity);
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for (std::uint32_t i = 0; i < multiplicity; i++) {
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v.push_back(Func::parse(p));
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}
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}
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return v;
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}
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};
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template <class T>
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class TlFetchObject {
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public:
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template <class ParserT>
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static tl_object_ptr<T> parse(ParserT &p) {
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return T::fetch(p);
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}
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};
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} // namespace td
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