diff options
| -rw-r--r-- | ports/windows/windows_mphal.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/ports/windows/windows_mphal.c b/ports/windows/windows_mphal.c index 153b04423..1e3a09291 100644 --- a/ports/windows/windows_mphal.c +++ b/ports/windows/windows_mphal.c @@ -106,12 +106,23 @@ void mp_hal_set_interrupt_char(char c) { } void mp_hal_move_cursor_back(uint pos) { + if (!pos) { + return; + } assure_conout_handle(); CONSOLE_SCREEN_BUFFER_INFO info; GetConsoleScreenBufferInfo(con_out, &info); info.dwCursorPosition.X -= (short)pos; - if (info.dwCursorPosition.X < 0) { + // Move up a line if needed. + while (info.dwCursorPosition.X < 0) { + info.dwCursorPosition.X = info.dwSize.X + info.dwCursorPosition.X; + info.dwCursorPosition.Y -= 1; + } + // Caller requested to move out of the screen. That's not possible so just clip, + // it's the caller's responsibility to not let this happen. + if (info.dwCursorPosition.Y < 0) { info.dwCursorPosition.X = 0; + info.dwCursorPosition.Y = 0; } SetConsoleCursorPosition(con_out, info.dwCursorPosition); } |