| va_list ap; |
| va_start(ap, format); |
| #ifdef _WIN32 |
| HANDLE stderr_handle = GetStdHandle(STD_ERROR_HANDLE); |
|
| // Check if stderr is something other than a tty/console |
| if (stderr_handle == INVALID_HANDLE_VALUE | |
| stderr_handle == nullptr | |
| uv_guess_handle(_fileno(stderr)) != UV_TTY) { |
| vfprintf(stderr, format, ap); |
| va_end(ap); |
| return; |
| } |
|
| // Fill in any placeholders |
| int n = _vscprintf(format, ap); |
| std::vector<char> out(n + 1); |
| vsprintf(out.data(), format, ap); |
|
| // Get required wide buffer size |
| n = MultiByteToWideChar(CP_UTF8, 0, out.data(), -1, nullptr, 0); |
|
| std::vector<wchar_t> wbuf(n); |
| MultiByteToWideChar(CP_UTF8, 0, out.data(), -1, wbuf.data(), n); |
|
| // Don't include the null character in the output |
| CHECK_GT(n, 0); |
| WriteConsoleW(stderr_handle, wbuf.data(), n - 1, nullptr, nullptr); |
| #else |
| vfprintf(stderr, format, ap); |
| #endif |
| va_end(ap); |
| } |