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