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/*
* stackframe.h - a usecode interpreter stack frame
*
* Copyright (C) 2002 The Exult Team
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef _STACKFRAME_H
#define _STACKFRAME_H
#include "exult_types.h"
#include <iosfwd>
class Usecode_function;
class Game_object;
class Usecode_value;
class Stack_frame
{
public:
Stack_frame(Usecode_function *fun, int event,
Game_object *caller, int chain, int depth);
~Stack_frame();
Usecode_function *function;
uint8 *ip; // current IP
uint8 *data; // pointer to start of data segment
uint8 *externs; // pointer to start of externs
uint8 *code; // pointer to (actual) code
uint8 *endp; // pointer directly past code segment
int line_number; // if debugging info present
// should probably add source filename?
int call_chain; // unique ID for this call chain
int call_depth; // zero for top level function
int num_externs;
int num_args;
int num_vars;
Usecode_value *locals;
int eventid;
Game_object *caller_item;
Usecode_value *save_sp;
static int LastCallChainID;
static int getCallChainID() { return ++LastCallChainID; }
};
std::ostream& operator<<(std::ostream& out, Stack_frame& val);
#endif
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