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/*
* stack.h -- Definitions for stack functions for use by extensions.
*/
/*
* Copyright (C) 2012, 2013 the Free Software Foundation, Inc.
*
* This file is part of GAWK, the GNU implementation of the
* AWK Programming Language.
*
* GAWK 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 3 of the License, or
* (at your option) any later version.
*
* GAWK 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
*/
extern int stack_empty(); /* return true if stack is empty */
extern void *stack_top(); /* return top object on the stack */
extern void *stack_pop(); /* pop top object and return it */
extern int stack_push(void *); /* push an object onto the stack,
* return 0 if failed, 1 if success
*/
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