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The GNU Forth Project
/*
$Id: forth.h,v 1.1.1.1 1994/02/11 16:30:47 anton Exp $
Copyright 1992 by the ANSI figForth Development Group
*/
/* common header file */
typedef void *Label;
#include "machine.h"
/* Forth data types */
typedef int Bool;
#define FLAG(b) (-(b))
#define F_TRUE (FLAG(0==0))
#define F_FALSE (FLAG(0!=0))
typedef unsigned char Char;
typedef double Float;
typedef char *Address;
#ifdef DIRECT_THREADED
typedef Label Xt;
#else
typedef Label *Xt;
#endif
Label *engine(Xt *ip, Cell *sp, Cell *rp, Float *fp);
#ifndef DIRECT_THREADED
/* i.e. indirect threaded */
/* the direct threaded version is machine dependent and resides in machine.h */
/* PFA gives the parameter field address corresponding to a cfa */
#define PFA(cfa) (((Cell *)cfa)+2)
/* PFA1 is a special version for use just after a NEXT1 */
#define PFA1(cfa) PFA(cfa)
/* CODE_ADDRESS is the address of the code jumped to through the code field */
#define CODE_ADDRESS(cfa) (*(Label *)(cfa))
/* DOES_CODE is the Forth code does jumps to */
#define DOES_CODE(cfa) (cfa[1])
#define DOES_CODE1(cfa) DOES_CODE(cfa)
/* MAKE_CF creates an appropriate code field at the cfa;
ca is the code address */
#define MAKE_CF(cfa,ca) ((*(Label *)(cfa)) = ((Label)ca))
/* make a code field for a defining-word-defined word */
#define MAKE_DOES_CF(cfa,does_code) ({MAKE_CF(cfa,DODOES); \
((Cell *)cfa)[1] = (Cell)does_code;})
/* the does handler resides between DOES> and the following Forth code */
#define DOES_HANDLER_SIZE 8
#define MAKE_DOES_HANDLER(addr) 0 /* do nothing */
#endif
#ifdef DEBUG
# define NAME(string) puts(string);
#else
# define NAME(string)
#endif
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