/*  Copyright (C) 1996-1997  Id Software, Inc.

    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

    See file, 'COPYING', for details.
*/

// this file is shared by QuakeForge and qfcc
#ifndef __pr_comp_h
#define __pr_comp_h

#include "QF/qtypes.h"

typedef int	func_t;
typedef int	string_t;

typedef enum {
	ev_void,
	ev_string,
	ev_float,
	ev_vector,
	ev_entity,
	ev_field,
	ev_func,
	ev_pointer,
	ev_quaternion,
	ev_int,
	
	ev_type_count		// not a type, gives number of types
} etype_t;


#define	OFS_NULL		0
#define	OFS_RETURN		1
#define	OFS_PARM0		4		// leave 3 ofs for each parm to hold vectors
#define	OFS_PARM1		7
#define	OFS_PARM2		10
#define	OFS_PARM3		13
#define	OFS_PARM4		16
#define	OFS_PARM5		19
#define	OFS_PARM6		22
#define	OFS_PARM7		25
#define	RESERVED_OFS	28


typedef enum {
	OP_DONE,
	OP_MUL_F,
	OP_MUL_V,
	OP_MUL_FV,
	OP_MUL_VF,
	OP_DIV_F,
	OP_ADD_F,
	OP_ADD_V,
	OP_SUB_F,
	OP_SUB_V,
	
	OP_EQ_F,
	OP_EQ_V,
	OP_EQ_S,
	OP_EQ_E,
	OP_EQ_FNC,
	
	OP_NE_F,
	OP_NE_V,
	OP_NE_S,
	OP_NE_E,
	OP_NE_FNC,
	
	OP_LE,
	OP_GE,
	OP_LT,
	OP_GT,

	OP_LOAD_F,
	OP_LOAD_V,
	OP_LOAD_S,
	OP_LOAD_ENT,
	OP_LOAD_FLD,
	OP_LOAD_FNC,

	OP_ADDRESS,

	OP_STORE_F,
	OP_STORE_V,
	OP_STORE_S,
	OP_STORE_ENT,
	OP_STORE_FLD,
	OP_STORE_FNC,

	OP_STOREP_F,
	OP_STOREP_V,
	OP_STOREP_S,
	OP_STOREP_ENT,
	OP_STOREP_FLD,
	OP_STOREP_FNC,

	OP_RETURN,
	OP_NOT_F,
	OP_NOT_V,
	OP_NOT_S,
	OP_NOT_ENT,
	OP_NOT_FNC,
	OP_IF,
	OP_IFNOT,
	OP_CALL0,
	OP_CALL1,
	OP_CALL2,
	OP_CALL3,
	OP_CALL4,
	OP_CALL5,
	OP_CALL6,
	OP_CALL7,
	OP_CALL8,
	OP_STATE,
	OP_GOTO,
	OP_AND,
	OP_OR,
	
	OP_BITAND,
	OP_BITOR,

	OP_ADD_S,
	OP_LE_S,
	OP_GE_S,
	OP_LT_S,
	OP_GT_S,
} pr_opcode_e;

typedef struct
{
	const char	*name;
	const char	*opname;
	pr_opcode_e opcode;
	int			priority;
	qboolean	right_associative;
	etype_t		type_a, type_b, type_c;
	int			min_version;
} opcode_t;

extern opcode_t pr_opcodes[];
opcode_t *PR_Opcode (short opcode);
void PR_Opcode_Init (void);

typedef struct statement_s
{
	unsigned short	op;
	short	a,b,c;
} dstatement_t;

typedef struct
{
	unsigned short	type;		// if DEF_SAVEGLOBGAL bit is set
								// the variable needs to be saved in savegames
	unsigned short	ofs;
	int			s_name;
} ddef_t;

#define	DEF_SAVEGLOBAL	(1<<15)

#define	MAX_PARMS	8

typedef struct
{
	int		first_statement;	// negative numbers are builtins
	int		parm_start;
	int		locals;				// total ints of parms + locals
	
	int		profile;		// runtime
	
	int		s_name;
	int		s_file;			// source file defined in
	
	int		numparms;
	byte	parm_size[MAX_PARMS];
} dfunction_t;


#define	PROG_ID_VERSION	6
#define	PROG_VERSION	0x00fff001	// MMmmmRRR 0.fff.001 (hex)

typedef struct
{
	int		version;
	int		crc;			// check of header file
	
	int		ofs_statements;
	int		numstatements;	// statement 0 is an error

	int		ofs_globaldefs;
	int		numglobaldefs;
	
	int		ofs_fielddefs;
	int		numfielddefs;
	
	int		ofs_functions;
	int		numfunctions;	// function 0 is an empty
	
	int		ofs_strings;
	int		numstrings;		// first string is a null string

	int		ofs_globals;
	int		numglobals;
	
	int		entityfields;
} dprograms_t;

#endif // __pr_comp_h