Sweden-Number/windows/keyboard.c

105 lines
2.6 KiB
C

/*
* Keyboard related functions
*
* Copyright 1993 Bob Amstadt
*/
#include <string.h>
#include "win.h"
#include "windows.h"
extern BOOL MouseButtonsStates[3];
extern BOOL AsyncMouseButtonsStates[3];
extern BYTE KeyStateTable[256];
extern BYTE AsyncKeyStateTable[256];
/**********************************************************************
* GetKeyState [USER.106]
*/
INT GetKeyState(INT keycode)
{
INT retval;
switch(keycode) {
case VK_LBUTTON:
return MouseButtonsStates[0];
case VK_MBUTTON:
return MouseButtonsStates[1];
case VK_RBUTTON:
return MouseButtonsStates[2];
default:
retval = ( (INT)(KeyStateTable[keycode] & 0x80) << 8 ) |
(INT)(KeyStateTable[keycode] & 0x01);
}
return retval;
}
/**********************************************************************
* GetKeyboardState [USER.222]
*/
void GetKeyboardState(BYTE FAR *lpKeyState)
{
if (lpKeyState != NULL) {
KeyStateTable[VK_LBUTTON] = MouseButtonsStates[0];
KeyStateTable[VK_MBUTTON] = MouseButtonsStates[1];
KeyStateTable[VK_RBUTTON] = MouseButtonsStates[2];
memcpy(lpKeyState, KeyStateTable, 256);
}
}
/**********************************************************************
* SetKeyboardState [USER.223]
*/
void SetKeyboardState(BYTE FAR *lpKeyState)
{
if (lpKeyState != NULL) {
memcpy(KeyStateTable, lpKeyState, 256);
MouseButtonsStates[0] = KeyStateTable[VK_LBUTTON];
MouseButtonsStates[1] = KeyStateTable[VK_MBUTTON];
MouseButtonsStates[2] = KeyStateTable[VK_RBUTTON];
}
}
/**********************************************************************
* GetAsyncKeyState (USER.249)
*
* Determine if a key is or was pressed. retval has high-order
* byte set to 1 if currently pressed, low-order byte 1 if key has
* been pressed.
*
* This uses the variable AsyncMouseButtonsStates and
* AsyncKeyStateTable (set in event.c) which have the mouse button
* number or key number (whichever is applicable) set to true if the
* mouse or key had been depressed since the last call to
* GetAsyncKeyState.
*/
int GetAsyncKeyState(int nKey)
{
short retval;
switch (nKey) {
case VK_LBUTTON:
retval = AsyncMouseButtonsStates[0] |
(MouseButtonsStates[0] << 8);
break;
case VK_MBUTTON:
retval = AsyncMouseButtonsStates[1] |
(MouseButtonsStates[1] << 8);
break;
case VK_RBUTTON:
retval = AsyncMouseButtonsStates[2] |
(MouseButtonsStates[2] << 8);
break;
default:
retval = AsyncKeyStateTable[nKey] |
(KeyStateTable[nKey] << 8);
break;
}
memset( AsyncMouseButtonsStates, 0, 3 ); /* all states to false */
memset( AsyncKeyStateTable, 0, 256 );
return retval;
}