// Ввод скан-кода клавиши с ожиданием нажатия
// Необработанные эвенты передаются функции HandleEvent
short ReadScan()
{
short res;
SDL_Event event;
DrawScreen();
for(;;)
{
SDL_WaitEvent(&event);
if (event.type==SDL_KEYDOWN && !(event.key.keysym.mod & KMOD_ALT))
{
res=(event.key.keysym.scancode&0x7f); // в драйвере directx бит 7 установлен?
res=TranslateScanCode(res)<<8;
// if (event.key.keysym.sym<128)
// res|=event.key.keysym.sym;
if (event.key.keysym.unicode<128)
res|=event.key.keysym.unicode;
return res;
}
HandleEvent(&event);
}
}
UCHAR
FwInputScanCode (
VOID
)
/*++
Routine Description:
This routine reads a byte from the keyboard. If no data is available,
it blocks until a key is typed.
Arguments:
None.
Return Value:
Returns the character read from the keyboard.
--*/
{
#ifndef ALPHA
UCHAR ScanCode;
while (KbdBuffer.ReadIndex == KbdBuffer.WriteIndex) {
}
KbdBuffer.ReadIndex = (KbdBuffer.ReadIndex+1) % KBD_BUFFER_SIZE;
ScanCode = KbdBuffer.Buffer[KbdBuffer.ReadIndex];
return ScanCode;
#else
//
// Alpha. If there are remaining characters in the
// circular buffer, return the next one. Otherwise,
// hang until another character is typed and then call
// TranslateScanCode. Then return a character.
//
while (TRUE) {
if (KbdBuffer.ReadIndex != KbdBuffer.WriteIndex) {
//
// A character is in the buffer. Return it.
//
KbdBuffer.ReadIndex = (KbdBuffer.ReadIndex+1) % KBD_BUFFER_SIZE;
return (KbdBuffer.Buffer[KbdBuffer.ReadIndex]);
}
//
// Wait until a character is typed, then scan it, and loop back.
// The TranslateScanCode() calls will eventually bump the KbdBuffer
// WriteIndex.
//
while ((READ_PORT_UCHAR((PUCHAR)&KEYBOARD_READ->Status) &
KBD_OBF_MASK) == 0) {
}
TranslateScanCode(READ_PORT_UCHAR((PUCHAR)&KEYBOARD_READ->Data));
FwStallExecution(10); // Don't pound on the controller.
}
#endif
}
ARC_STATUS
KeyboardGetReadStatus (
IN ULONG FileId
)
/*++
Routine Description:
This routine checks to see if a character is available from the keyboard.
Arguments:
FileId - Supplies a file identifier.
Return Value:
Returns ESUCCESS is a byte is available, otherwise EAGAIN is returned.
--*/
{
#ifndef ALPHA
if (KbdBuffer.ReadIndex == KbdBuffer.WriteIndex) {
return EAGAIN;
} else {
return ESUCCESS;
}
#else
//
// Alpha does polling.
//
if (KbdBuffer.ReadIndex != KbdBuffer.WriteIndex) {
// A character is available
return ESUCCESS;
} else if (READ_PORT_UCHAR((PUCHAR)&KEYBOARD_READ->Status) & KBD_OBF_MASK) {
// A character is available at the keyboard, but it may be a
// character that is not returned to the calling program (e.g., a
// break code). Screen it here.
TranslateScanCode(READ_PORT_UCHAR((PUCHAR)&KEYBOARD_READ->Data));
if (KbdBuffer.ReadIndex != KbdBuffer.WriteIndex) {
// A character is now available
return ESUCCESS;
} else {
// A character is not available, let the user drain any other
// characters or non-characters by calling this again.
return EAGAIN;
}
} else {
// A character is not available
return EAGAIN;
}
#endif
}
