#ifndef _vm_h
#define _vm_h

#include <stddef.h>
#include <stdlib.h>
#include <stdint.h>

typedef struct _thread Thread;

#include "val.h"
#include "com.h"

typedef struct {
	size_t ip;
	Chunk *ch;
	size_t fp;
} StackFrame;

#define MAXDEPTH  64
#define STACKSIZE 256*MAXDEPTH
typedef struct _thread {
	Chunk *ch;
	size_t ip;
	Val stack[STACKSIZE];
	size_t fp;
	size_t sp;
	StackFrame rstack[MAXDEPTH];
	size_t rsp;
} Thread;
Thread thread_new(State *S);

typedef enum {
	OP_RET,
	OP_LOADK,

	OP_ADD,
	OP_SUB,
	OP_MUL,
	OP_DIV,
	OP_MOD,

	OP_EQU,
	OP_CMP,

	OP_HALT,

	OP_DROP,

	OP_GETGLOBAL,
	OP_SETGLOBAL,

	OP_GETLOCAL,
	OP_SETLOCAL,

	OP_TRUE,
	OP_FALSE,
	OP_NIL,

	OP_0BRANCH,
	OP_SKIP,
	OP_REDO,

	OP_CALL,
	OP_TAILCALL,
	OP_ENDSCOPE,

	OP_ARRNEW,
	OP_ARRAPPEND,
	OP_ARRLEN,
	OP_SETIDX,
} Op;

int runvm(State *S);

#endif