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#include "libbb.h"
int64_t FAST_FUNC read_key(int fd, char *buf UNUSED_PARAM, int timeout)
{
HANDLE cin = GetStdHandle(STD_INPUT_HANDLE);
INPUT_RECORD record;
DWORD nevent_out, mode;
int ret = -1;
#if ENABLE_FEATURE_EURO
wchar_t uchar;
char achar;
#else
char *s;
#endif
int alt_pressed = FALSE;
DWORD state;
if (fd != 0)
bb_error_msg_and_die("read_key only works on stdin");
if (cin == INVALID_HANDLE_VALUE)
return -1;
GetConsoleMode(cin, &mode);
SetConsoleMode(cin, 0);
while (1) {
if (timeout > 0) {
if (WaitForSingleObject(cin, timeout) != WAIT_OBJECT_0)
goto done;
}
#if ENABLE_FEATURE_EURO
if (!ReadConsoleInputW(cin, &record, 1, &nevent_out))
#else
if (!ReadConsoleInput(cin, &record, 1, &nevent_out))
#endif
goto done;
if (record.EventType != KEY_EVENT)
continue;
state = record.Event.KeyEvent.dwControlKeyState;
if (!record.Event.KeyEvent.bKeyDown) {
/* ignore all key up events except Alt */
if (alt_pressed && !(state & LEFT_ALT_PRESSED))
alt_pressed = FALSE;
else
continue;
}
else {
alt_pressed = ((state & LEFT_ALT_PRESSED) != 0);
}
#if ENABLE_FEATURE_EURO
if (!record.Event.KeyEvent.uChar.UnicodeChar) {
#else
if (!record.Event.KeyEvent.uChar.AsciiChar) {
#endif
if (alt_pressed) {
switch (record.Event.KeyEvent.wVirtualKeyCode) {
case VK_MENU:
case VK_INSERT:
case VK_END:
case VK_DOWN:
case VK_NEXT:
case VK_LEFT:
case VK_CLEAR:
case VK_RIGHT:
case VK_HOME:
case VK_UP:
case VK_PRIOR:
case VK_KANA:
continue;
}
}
switch (record.Event.KeyEvent.wVirtualKeyCode) {
case VK_DELETE: ret = KEYCODE_DELETE; goto done;
case VK_INSERT: ret = KEYCODE_INSERT; goto done;
case VK_UP: ret = KEYCODE_UP; goto done;
case VK_DOWN: ret = KEYCODE_DOWN; goto done;
case VK_RIGHT:
if (state & (RIGHT_CTRL_PRESSED|LEFT_CTRL_PRESSED)) {
ret = KEYCODE_CTRL_RIGHT;
goto done;
}
ret = KEYCODE_RIGHT;
goto done;
case VK_LEFT:
if (state & (RIGHT_CTRL_PRESSED|LEFT_CTRL_PRESSED)) {
ret = KEYCODE_CTRL_LEFT;
goto done;
}
ret = KEYCODE_LEFT;
goto done;
case VK_HOME: ret = KEYCODE_HOME; goto done;
case VK_END: ret = KEYCODE_END; goto done;
case VK_PRIOR: ret = KEYCODE_PAGEUP; goto done;
case VK_NEXT: ret = KEYCODE_PAGEDOWN; goto done;
}
continue;
}
#if ENABLE_FEATURE_EURO
uchar = record.Event.KeyEvent.uChar.UnicodeChar;
achar = uchar & 0x7f;
if (achar != uchar)
WideCharToMultiByte(CP_ACP, 0, &uchar, 1, &achar, 1, NULL, NULL);
ret = achar;
#else
if ( (record.Event.KeyEvent.uChar.AsciiChar & 0x80) == 0x80 ) {
s = &record.Event.KeyEvent.uChar.AsciiChar;
OemToCharBuff(s, s, 1);
}
ret = record.Event.KeyEvent.uChar.AsciiChar;
#endif
break;
}
done:
SetConsoleMode(cin, mode);
return ret;
}
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