56 lines
1.4 KiB
C++
56 lines
1.4 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 modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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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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*
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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, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "glk/alan2/types.h"
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#include "glk/alan2/main.h"
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#include "glk/alan2/stack.h"
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namespace Glk {
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namespace Alan2 {
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/* PRIVATE DATA */
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#define STACKSIZE 100
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/* The AMACHINE STACK */
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static Aptr stack[STACKSIZE];
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static int stackp = 0;
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void push(Aptr i) {
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if (stackp == STACKSIZE)
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syserr("Out of stack space.");
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stack[stackp++] = i;
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}
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Aptr pop() {
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if (stackp == 0)
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syserr("Stack underflow.");
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return (stack[--stackp]);
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}
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Aptr top() {
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return (stack[stackp - 1]);
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}
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} // End of namespace Alan2
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} // End of namespace Glk
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