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/*\ 
||| This file a part of uLPC, and is copyright by Fredrik Hubinette 
||| uLPC is distributed as GPL (General Public License) 
||| See the files COPYING and DISCLAIMER for more information. 
\*/ 
#ifndef INTERPRET_H 
#define INTERPRET_H 
 
#include "program.h" 
#include "config.h" 
 
struct frame 
{ 
  unsigned char *pc; 
  struct frame *parent_frame; 
  struct svalue *locals; 
  INT32 args; 
  struct object *current_object; 
  struct inherit context; 
  char *current_storage; 
  INT32 fun; 
#ifdef DEBUG 
  INT16 num_locals; 
  INT16 num_args; 
#endif 
}; 
 
#ifdef DEBUG 
#define debug_check_stack() do{if(sp<evaluator_stack)fatal("Stack error.\n");}while(0) 
#else 
#define debug_check_stack()  
#endif 
 
#define pop_stack() do{ free_svalue(--sp); debug_check_stack(); }while(0) 
#define push_program(P) sp->u.program=(P),sp++->type=T_PROGRAM 
#define push_int(I) sp->u.integer=(I),sp->type=T_INT,sp++->subtype=NUMBER_NUMBER 
#define push_mapping(M) sp->u.mapping=(M),sp++->type=T_MAPPING 
#define push_array(A) sp->u.array=(A),sp++->type=T_ARRAY 
#define push_list(L) sp->u.list=(L),sp++->type=T_LIST 
#define push_string(S) sp->u.string=(S),sp++->type=T_STRING 
#define push_object(O) sp->u.object=(O),sp++->type=T_OBJECT 
#define push_float(F) sp->u.float_number=(F),sp++->type=T_FLOAT 
#define push_text(T) sp->u.string=make_shared_string(T),sp++->type=T_STRING 
#define push_svalue(S) (assign_svalue_no_free(sp,(S)),sp++) 
 
#define APPLY_MASTER(FUN,ARGS) \ 
do{ \ 
  static int fun_,master_cnt=0; \ 
  struct object *master_ob=master(); \ 
  if(master_cnt != master_ob->prog->id) \ 
  { \ 
    fun_=find_identifier(FUN,master_ob->prog); \ 
    master_cnt = master_ob->prog->id; \ 
  } \ 
  apply_low(master_ob, fun_, ARGS); \ 
}while(0) 
 
#define SAFE_APPLY_MASTER(FUN,ARGS) \ 
do{ \ 
  static int fun_,master_cnt=0; \ 
  struct object *master_ob=master(); \ 
  if(master_cnt != master_ob->prog->id) \ 
  { \ 
    fun_=find_identifier(FUN,master_ob->prog); \ 
    master_cnt = master_ob->prog->id; \ 
  } \ 
  safe_apply_low(master_ob, fun_, ARGS); \ 
}while(0) 
 
/* Prototypes begin here */ 
void init_interpreter(); 
void exit_interpreter(); 
void check_stack(INT32 size); 
void check_mark_stack(INT32 size); 
void lvalue_to_svalue_no_free(struct svalue *to,struct svalue *lval); 
void assign_lvalue(struct svalue *lval,struct svalue *from); 
union anything *get_pointer_if_this_type(struct svalue *lval, TYPE_T t); 
void print_return_value(); 
void pop_n_elems(INT32 x); 
void reset_evaluator(); 
struct backlog; 
void dump_backlog(void); 
int apply_low_safe_and_stupid(struct object *o, INT32 offset); 
void apply_low(struct object *o, int fun, int args); 
void safe_apply_low(struct object *o,int fun,int args); 
void safe_apply(struct object *o, char *fun ,INT32 args); 
void apply_lfun(struct object *o, int fun, int args); 
void apply_shared(struct object *o, 
                  struct lpc_string *fun, 
                  int args); 
void apply(struct object *o, char *fun, int args); 
void strict_apply_svalue(struct svalue *s, INT32 args); 
void apply_svalue(struct svalue *s, INT32 args); 
void slow_check_stack(); 
void cleanup_interpret(); 
/* Prototypes end here */ 
 
extern struct svalue *sp; 
extern struct svalue **mark_sp; 
extern struct svalue *evaluator_stack; 
extern struct svalue **mark_stack; 
extern struct frame *fp; /* frame pointer */ 
#endif