Inside Bitcoin

1// Copyright (c) The Bitcoin Core developers
2// Distributed under the MIT software license, see the accompanying
3// file COPYING or http://www.opensource.org/licenses/mit-license.php.
4
5#include <printer.h>
6
7#include <init.capnp.h>
8#include <init.capnp.proxy.h> // NOLINT(misc-include-cleaner) // IWYU pragma: keep
9
10#include <charconv>
11#include <cstring>
12#include <fstream>
13#include <iostream>
14#include <kj/async.h>
15#include <kj/common.h>
16#include <kj/memory.h>
17#include <memory>
18#include <mp/proxy-io.h>
19#include <stdexcept>
20#include <string>
21#include <system_error>
22
23class PrinterImpl : public Printer
24{
25public:
26    void print(const std::string& message) override { std::cout << "mpprinter: " << message << std::endl; }
27};
28
29class InitImpl : public Init
30{
31public:
32    std::unique_ptr<Printer> makePrinter() override { return std::make_unique<PrinterImpl>(); }
33};
34
35static void LogPrint(mp::LogMessage log_data)
36{
37    if (log_data.level == mp::Log::Raise) throw std::runtime_error(log_data.message);
38    std::ofstream("debug.log", std::ios_base::app) << log_data.message << std::endl;
39}
40
41int main(int argc, char** argv)
42{
43    if (argc != 2) {
44        std::cout << "Usage: mpprinter <fd>\n";
45        return 1;
46    }
47    int fd;
48    if (std::from_chars(argv[1], argv[1] + strlen(argv[1]), fd).ec != std::errc{}) {
49        std::cerr << argv[1] << " is not a number or is larger than an int\n";
50        return 1;
51    }
52    mp::EventLoop loop("mpprinter", LogPrint);
53    std::unique_ptr<Init> init = std::make_unique<InitImpl>();
54    mp::ServeStream<InitInterface>(loop, fd, *init);
55    loop.loop();
56    return 0;
57}
58