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Diffstat (limited to 'sword2/driver/keyboard.cpp')
| -rw-r--r-- | sword2/driver/keyboard.cpp | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/sword2/driver/keyboard.cpp b/sword2/driver/keyboard.cpp new file mode 100644 index 0000000000..6f9d51c997 --- /dev/null +++ b/sword2/driver/keyboard.cpp @@ -0,0 +1,129 @@ +/* Copyright (C) 1994-2003 Revolution Software Ltd + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * $Header$ + */ + +//============================================================================= +// +// Filename : keyboard.c +// Created : 19th September 1996 +// By : P.R.Porter +// +// Summary : This module holds the interface to the keyboard +// +// Version Date By Description +// ------- --------- --- ----------------------------------------------- +// 1.0 19-Sep-96 PRP Keyboard functions. Simple logging of +// previous 32 keys pressed. +// +// 1.1 19-Sep-96 PRP Fixed bug, ReadKey did not return RD_OK. +// +// 1.2 13-Aug-97 PSJ Added GetKeyStatus +// +// Functions +// --------- +// +// -------------------------------------------------------------------------- +// +// BOOL KeyWaiting(void) +// +// This function returns TRUE if there is an unprocessed key waiting in the +// queue, FALSE otherwise. +// +// -------------------------------------------------------------------------- +// +// int32 ReadKey(char *key) +// +// Sets the value of key passed in to the current waiting key. If there is +// no key waiting, an error code is returned. +// +// -------------------------------------------------------------------------- +// +// void GetKeyStatus(_drvKeyStatus *s) +// +// Retrieves the status of the keyboard handler. +// +//============================================================================= + + +#define WIN32_LEAN_AND_MEAN + +//#include <windows.h> +//#include <windowsx.h> + +#include "driver96.h" + +#define MAX_KEY_BUFFER 23 + +uint8 keyBacklog = 0; // The number of key presses waiting to be processed. +uint8 keyPointer = 0; // Index of the next key to read from the buffer. +char keyBuffer[MAX_KEY_BUFFER]; // The keyboard buffer + + + +void WriteKey(char key) +{ + if (keyBuffer && keyBacklog < MAX_KEY_BUFFER) + { + keyBuffer[(keyPointer + keyBacklog) % MAX_KEY_BUFFER] = key; + keyBacklog += 1; + } +} + + + +BOOL KeyWaiting(void) + +{ + + if (keyBacklog) + return(TRUE); + else + return(FALSE); + +} + + + +int32 ReadKey(char *key) + +{ + if (!keyBacklog) + return(RDERR_NOKEYWAITING); + + if (key == NULL) + return(RDERR_INVALIDPOINTER); + + *key = keyBuffer[keyPointer++]; + if (keyPointer == MAX_KEY_BUFFER) + keyPointer = 0; + + keyBacklog -= 1; + + return(RD_OK); + +} + +void GetKeyStatus(_drvKeyStatus *s) + +{ + // Flush key buffer + s->pBacklog = &keyBacklog; + s->pPointer = &keyPointer; + s->pBuffer = keyBuffer; +} + |