int getchar_replacement() {
int code = bgetc();
int status = readKeyboardShiftFlags();
uint8_t scancode = code >> 8;
// Special scancode sent when alt + some keys are pressed
if (scancode >= 0x78 && scancode <= 0x83)
scancode -= 0x76;
if (scancode < KEYBOARD_MAP_SIZE && !(status & (STATUS_LCTRL| STATUS_RCTRL))) {
int key;
if ((status & (STATUS_LALT|STATUS_RALT)) &&
(status & (STATUS_LSHIFT|STATUS_RSHIFT|STATUS_CAPS))) {
key=current_layout->keyboard_map_shift_alt[scancode];
}
else if (status & (STATUS_LSHIFT|STATUS_RSHIFT|STATUS_CAPS))
key=current_layout->keyboard_map_shift[scancode];
else if (status & (STATUS_LALT|STATUS_RALT))
key=current_layout->keyboard_map_alt[scancode];
else
key=current_layout->keyboard_map[scancode];
if (key != 0) // do the mapping
code = key;
}
if (ASCII_KEY(code) != 0) // if ascii not null return it
code = ASCII_KEY(code);
//printf("Code: %04x\n",code);
return (code);
}
int selectAlternateBootDevice(int bootdevice)
{
int key;
int newbootdevice;
int digitsI = 0;
char *end;
char digits[3] = {0,0,0};
// We've already printed the current boot device so user knows what it is
printf("Typical boot devices are 80 (First HD), 81 (Second HD)\n");
printf("Enter two-digit hexadecimal boot device [%02x]: ", bootdevice);
do {
key = getchar();
switch (ASCII_KEY(key)) {
case KEY_BKSP:
if (digitsI > 0) {
int x, y, t;
getCursorPositionAndType(&x, &y, &t);
// Assume x is not 0;
x--;
setCursorPosition(x,y,0); // back up one char
// Overwrite with space without moving cursor position
putca(' ', 0x07, 1);
digitsI--;
} else {
// TODO: Beep or something
}
break;
case KEY_ENTER:
digits[digitsI] = '\0';
newbootdevice = strtol(digits, &end, 16);
if (end == digits && *end == '\0') {
// User entered empty string
printf("\nUsing default boot device %x\n", bootdevice);
key = 0;
} else if(end != digits && *end == '\0') {
bootdevice = newbootdevice;
printf("\n");
key = 0; // We gots da boot device
} else {
printf("\nCouldn't parse. try again: ");
digitsI = 0;
}
break;
default:
if (isxdigit(ASCII_KEY(key)) && digitsI < 2) {
putchar(ASCII_KEY(key));
digits[digitsI++] = ASCII_KEY(key);
} else {
// TODO: Beep or something
}
break;
};
} while (key != 0);
return bootdevice;
}
/* keyboard module is character device - in this implementation return only
single number that represent keystroke */
static int i8042_get ( void *data, size_t size, uint flags, device_t *d )
{
int32 key = (int32) 0;
if ( buf_size > 0 )
{
if ( ( flags & ONLY_LAST ) && buf_last != buf_first )
{
/* return last keystroke, drop all before */
buf_last = buf_first;
buf_size = 1;
}
do {
key = keyb_buffer[buf_first];
buf_first = ( buf_first + 1 ) % KEYB_BUFF_SIZE;
buf_size--;
}
while ( ( flags & ONLY_ASCII ) && !( key = ASCII_KEY (key) ) &&
buf_size > 0 );
if ( flags & CLEAR_BUFFER )
buf_first = buf_last = buf_size = 0;
if ( key && data )
*( (int32 *) data ) = key;
}
return ( key ? 1 : 0 );
}
/*! Keyboard interrupt handler - read new keystrokes and process them */
static void i8042_interrupt_handler ( int irq_num, void *device )
{
int32 c;
int new_keystrokes = FALSE;
while ( ( c = i8042_read () ) >= 0 )
{
new_keystrokes |= i8042_insert_keystroke ( c );
if ( ASCII_KEY ( c ) && ( keyb_flags & ECHO_ON ) )
kprint ( "%c", ASCII_KEY ( c ) );
}
/* halt on Ctrl+p */
//if ( ASCII_KEY(c) == 'p' && (spec_keys_down & LCTRL) )
// halt ();
if ( new_keystrokes && kernel_interrupt_callback_function )
kernel_interrupt_callback_function ();
}
static void updateBootArgs( int key )
{
key = ASCII_KEY(key);
switch ( key )
{
case KEY_BKSP:
if ( gBootArgsPtr > gBootArgs )
{
*--gBootArgsPtr = '\0';
int x, y, t;
getCursorPositionAndType( &x, &y, &t );
if ( x == 0 && y )
{
x = 80; y--;
}
if (x) {
x--;
}
if( bootArgs->Video.v_display == VGA_TEXT_MODE )
{
setCursorPosition( x, y, 0 );
putca(' ', 0x07, 1);
}
else
{
updateGraphicBootPrompt();
}
}
break;
default:
if ( key >= ' ' && gBootArgsPtr < gBootArgsEnd)
{
*gBootArgsPtr++ = key;
if( bootArgs->Video.v_display != VGA_TEXT_MODE )
updateGraphicBootPrompt();
else if ( key >= ' ' && key < 0x7f)
putchar(key);
}
break;
}
}
/*! Insert keystroke into keyboard software buffer */
static int i8042_insert_keystroke ( int c )
{
if ( c == (int32) 0 ) /* empty keystroke changes nothing */
return 0;
if ( ( keyb_flags & ONLY_ASCII ) && ASCII_KEY ( c ) == 0 )
return 0;
/* if buffer is full - overwrite oldest keystroke */
keyb_buffer[buf_last] = c | spec_keys_down;
buf_last = ( buf_last + 1 ) % KEYB_BUFF_SIZE;
if ( buf_size < KEYB_BUFF_SIZE )
buf_size++; /* buffer not full */
else
buf_first = ( buf_first + 1 ) % KEYB_BUFF_SIZE;
/* buffer full, oldest keystroke is overwritten with new */
return 1;
}