Function getchar32

common/console.cpp:200–263

    }

    static char32_t getchar32() {
#if defined(_WIN32)
        HANDLE hConsole = GetStdHandle(STD_INPUT_HANDLE);
        wchar_t high_surrogate = 0;

        while (true) {
            INPUT_RECORD record;
            DWORD count;
            if (!ReadConsoleInputW(hConsole, &record, 1, &count) || count == 0) {
                return WEOF;
            }

            if (record.EventType == KEY_EVENT && record.Event.KeyEvent.bKeyDown) {
                wchar_t wc = record.Event.KeyEvent.uChar.UnicodeChar;
                if (wc == 0) {
                    const DWORD ctrl_mask = LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED;
                    const bool ctrl_pressed = (record.Event.KeyEvent.dwControlKeyState & ctrl_mask) != 0;
                    switch (record.Event.KeyEvent.wVirtualKeyCode) {
                        case VK_LEFT:   return ctrl_pressed ? KEY_CTRL_ARROW_LEFT  : KEY_ARROW_LEFT;
                        case VK_RIGHT:  return ctrl_pressed ? KEY_CTRL_ARROW_RIGHT : KEY_ARROW_RIGHT;
                        case VK_UP:     return KEY_ARROW_UP;
                        case VK_DOWN:   return KEY_ARROW_DOWN;
                        case VK_HOME:   return KEY_HOME;
                        case VK_END:    return KEY_END;
                        case VK_DELETE: return KEY_DELETE;
                        default:        continue;
                    }
                }

                if ((wc >= 0xD800) && (wc <= 0xDBFF)) { // Check if wc is a high surrogate
                    high_surrogate = wc;
                    continue;
                }
                if ((wc >= 0xDC00) && (wc <= 0xDFFF)) { // Check if wc is a low surrogate
                    if (high_surrogate != 0) { // Check if we have a high surrogate
                        return ((high_surrogate - 0xD800) << 10) + (wc - 0xDC00) + 0x10000;
                    }
                }

                high_surrogate = 0; // Reset the high surrogate
                return static_cast<char32_t>(wc);
            }
        }
#else
        wchar_t wc = getwchar();
        if (static_cast<wint_t>(wc) == WEOF) {
            return WEOF;
        }

#if WCHAR_MAX == 0xFFFF
        if ((wc >= 0xD800) && (wc <= 0xDBFF)) { // Check if wc is a high surrogate
            wchar_t low_surrogate = getwchar();
            if ((low_surrogate >= 0xDC00) && (low_surrogate <= 0xDFFF)) { // Check if the next wchar is a low surrogate
                return (static_cast<char32_t>(wc & 0x03FF) << 10) + (low_surrogate & 0x03FF) + 0x10000;
            }
        }
        if ((wc >= 0xD800) && (wc <= 0xDFFF)) { // Invalid surrogate pair
            return 0xFFFD; // Return the replacement character U+FFFD