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/*
This file is part of Warzone 2100.
Copyright (C) 1999-2004 Eidos Interactive
Copyright (C) 2005-2010 Warzone 2100 Project
Warzone 2100 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.
Warzone 2100 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 Warzone 2100; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* Stack.h
*
* Interface to the stack system
*/
#ifndef _stack_h
#define _stack_h
//String support
//-----------------------------
#define MAXSTRLEN 255 //Max len of a single string
#define MAXSTACKLEN 8000
/* Initialise the stack */
extern BOOL stackInitialise(void);
/* Shutdown the stack */
extern void stackShutDown(void);
/* Push a value onto the stack */
extern BOOL stackPush(INTERP_VAL *psVal);
/* Pop a value off the stack */
extern BOOL stackPop(INTERP_VAL *psVal);
/* Return pointer to the top value without poping it */
extern BOOL stackPeekTop(INTERP_VAL **ppsVal);
/* Pop a value off the stack, checking that the type matches what is passed in */
extern BOOL stackPopType(INTERP_VAL *psVal);
/* Look at a value on the stack without removing it.
* index is how far down the stack to look.
* Index 0 is the top entry on the stack.
*/
extern BOOL stackPeek(INTERP_VAL *psVal, UDWORD index);
/* Print the top value on the stack */
extern void stackPrintTop(void);
/* Check if the stack is empty */
extern BOOL stackEmpty(void);
/* Do binary operations on the top of the stack
* This effectively pops two values and pushes the result
*/
extern BOOL stackBinaryOp(OPCODE opcode);
/* Perform a unary operation on the top of the stack
* This effectively pops a value and pushes the result
*/
extern BOOL stackUnaryOp(OPCODE opcode);
/* casts top of the stack to some other data type */
extern BOOL stackCastTop(INTERP_TYPE neededType);
/* Reset the stack to an empty state */
extern void stackReset(void);
#endif
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