/*
 * 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.
 * 
 */

// this file is shared by quake and qcc

typedef int   func_t;
typedef int   string_t;

typedef enum {
    ev_void, ev_string, ev_float, ev_vector, ev_entity, ev_field, ev_function, ev_pointer
} 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

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
};

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_VERSION	6
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;
