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/* 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.
*
* $Header$
*/
#include "common/stdafx.h"
#include "sword2/sword2.h"
namespace Sword2 {
void Input::writeKey(uint16 ascii, int keycode, int modifiers) {
if (_keyBuffer && _keyBacklog < MAX_KEY_BUFFER) {
KeyboardEvent *slot = &_keyBuffer[(_keyLogPos + _keyBacklog) % MAX_KEY_BUFFER];
slot->ascii = ascii;
slot->keycode = keycode;
slot->modifiers = modifiers;
_keyBacklog++;
}
}
/**
* @return true if there is an unprocessed key waiting in the queue
*/
bool Input::keyWaiting(void) {
return _keyBacklog != 0;
}
/**
* Sets the value of the keyboard event passed in to the current waiting key.
* @return RD_OK, or an error code to indicate there is no key waiting.
*/
int32 Input::readKey(KeyboardEvent *ev) {
if (!_keyBacklog)
return RDERR_NOKEYWAITING;
if (ev == NULL)
return RDERR_INVALIDPOINTER;
ev->ascii = _keyBuffer[_keyLogPos].ascii;
ev->keycode = _keyBuffer[_keyLogPos].keycode;
ev->modifiers = _keyBuffer[_keyLogPos].modifiers;
_keyLogPos++;
if (_keyLogPos == MAX_KEY_BUFFER)
_keyLogPos = 0;
_keyBacklog--;
return RD_OK;
}
} // End of namespace Sword2
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