1#include "utils.h"
 2
 3#include <flutter_windows.h>
 4#include <io.h>
 5#include <stdio.h>
 6#include <windows.h>
 7
 8#include <iostream>
 9
10void CreateAndAttachConsole() {
11  if (::AllocConsole()) {
12    FILE *unused;
13    if (freopen_s(&unused, "CONOUT$", "w", stdout)) {
14      _dup2(_fileno(stdout), 1);
15    }
16    if (freopen_s(&unused, "CONOUT$", "w", stderr)) {
17      _dup2(_fileno(stdout), 2);
18    }
19    std::ios::sync_with_stdio();
20    FlutterDesktopResyncOutputStreams();
21  }
22}
23
24std::vector<std::string> GetCommandLineArguments() {
25  // Convert the UTF-16 command line arguments to UTF-8 for the Engine to use.
26  int argc;
27  wchar_t** argv = ::CommandLineToArgvW(::GetCommandLineW(), &argc);
28  if (argv == nullptr) {
29    return std::vector<std::string>();
30  }
31
32  std::vector<std::string> command_line_arguments;
33
34  // Skip the first argument as it's the binary name.
35  for (int i = 1; i < argc; i++) {
36    command_line_arguments.push_back(Utf8FromUtf16(argv[i]));
37  }
38
39  ::LocalFree(argv);
40
41  return command_line_arguments;
42}
43
44std::string Utf8FromUtf16(const wchar_t* utf16_string) {
45  if (utf16_string == nullptr) {
46    return std::string();
47  }
48  int target_length = ::WideCharToMultiByte(
49      CP_UTF8, WC_ERR_INVALID_CHARS, utf16_string,
50      -1, nullptr, 0, nullptr, nullptr);
51  std::string utf8_string;
52  if (target_length == 0 || target_length > utf8_string.max_size()) {
53    return utf8_string;
54  }
55  utf8_string.resize(target_length);
56  int converted_length = ::WideCharToMultiByte(
57      CP_UTF8, WC_ERR_INVALID_CHARS, utf16_string,
58      -1, utf8_string.data(),
59      target_length, nullptr, nullptr);
60  if (converted_length == 0) {
61    return std::string();
62  }
63  return utf8_string;
64}