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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include "glk/alan2/types.h"
#include "glk/alan2/main.h"
#include "glk/alan2/stack.h"
namespace Glk {
namespace Alan2 {
/* PRIVATE DATA */
#define STACKSIZE 100
/* The AMACHINE STACK */
static Aptr stack[STACKSIZE];
static int stackp = 0;
void push(Aptr i) {
if (stackp == STACKSIZE)
syserr("Out of stack space.");
stack[stackp++] = i;
}
Aptr pop() {
if (stackp == 0)
syserr("Stack underflow.");
return (stack[--stackp]);
}
Aptr top() {
return (stack[stackp - 1]);
}
} // End of namespace Alan2
} // End of namespace Glk
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