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69 lines
1.7 KiB
C++
69 lines
1.7 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#include "illusions/illusions.h"
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#include "illusions/scriptstack.h"
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namespace Illusions {
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// ScriptStack
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ScriptStack::ScriptStack() {
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clear();
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}
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void ScriptStack::clear() {
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for (uint i = 0; i < 256; ++i) {
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_stack[i] = (int16)0xEEEE;
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}
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_stackPos = 256;
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}
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void ScriptStack::push(int16 value) {
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--_stackPos;
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if (_stackPos > 0)
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_stack[_stackPos] = value;
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}
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int16 ScriptStack::pop() {
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int16 value = 0;
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if (_stackPos < 256) {
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value = _stack[_stackPos];
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_stack[_stackPos] = (int16)0xEEEE;
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++_stackPos;
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}
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return value;
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}
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int16 ScriptStack::peek() {
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int16 value = 0;
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if (_stackPos < 256)
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value = _stack[_stackPos];
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return value;
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}
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int16 *ScriptStack::topPtr() {
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return &_stack[_stackPos];
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}
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} // End of namespace Illusions
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