Annotation of gforth/forth.h, revision 1.8
1.1 anton 1: /*
1.8 ! anton 2: $Id: forth.h,v 1.7 1994/07/08 15:00:39 anton Exp $
1.1 anton 3: Copyright 1992 by the ANSI figForth Development Group
4: */
5:
6: /* common header file */
7:
8: typedef void *Label;
9:
1.2 pazsan 10: /* symbol indexed constants */
11:
12: #define DOCOL 0
13: #define DOCON 1
14: #define DOVAR 2
15: #define DOUSER 3
1.8 ! anton 16: #define DODEFER 4
! 17: #define DODOES 5
! 18: #define DOESJUMP 6
1.6 benschop 19:
20: /* Some versions of some unices (Linux) have the symbol BIG_ENDIAN defined
21: in their standard headers. Make sure it's undefined -- Lennart */
22: #ifdef BIG_ENDIAN
23: #undef BIG_ENDIAN
24: #endif
1.2 pazsan 25:
1.1 anton 26: #include "machine.h"
27:
28: /* Forth data types */
29: typedef int Bool;
30: #define FLAG(b) (-(b))
1.5 pazsan 31: #define FILEIO(error) (FLAG(error) & -37)
32: #define FILEEXIST(error) (FLAG(error) & -38)
1.1 anton 33:
34: #define F_TRUE (FLAG(0==0))
35: #define F_FALSE (FLAG(0!=0))
36:
37: typedef unsigned char Char;
38: typedef double Float;
39: typedef char *Address;
40:
41: #ifdef DIRECT_THREADED
42: typedef Label Xt;
43: #else
44: typedef Label *Xt;
45: #endif
46:
1.4 anton 47: Label *engine(Xt *ip, Cell *sp, Cell *rp, Float *fp, Address lp);
1.7 anton 48: extern Xt *throw_ip;
1.1 anton 49:
50: #ifndef DIRECT_THREADED
51: /* i.e. indirect threaded */
52: /* the direct threaded version is machine dependent and resides in machine.h */
53:
54: /* PFA gives the parameter field address corresponding to a cfa */
55: #define PFA(cfa) (((Cell *)cfa)+2)
56: /* PFA1 is a special version for use just after a NEXT1 */
57: #define PFA1(cfa) PFA(cfa)
58: /* CODE_ADDRESS is the address of the code jumped to through the code field */
59: #define CODE_ADDRESS(cfa) (*(Label *)(cfa))
60: /* DOES_CODE is the Forth code does jumps to */
61: #define DOES_CODE(cfa) (cfa[1])
62: #define DOES_CODE1(cfa) DOES_CODE(cfa)
63: /* MAKE_CF creates an appropriate code field at the cfa;
64: ca is the code address */
65: #define MAKE_CF(cfa,ca) ((*(Label *)(cfa)) = ((Label)ca))
66: /* make a code field for a defining-word-defined word */
1.2 pazsan 67: #define MAKE_DOES_CF(cfa,does_code) ({MAKE_CF(cfa,symbols[DODOES]); \
1.1 anton 68: ((Cell *)cfa)[1] = (Cell)does_code;})
69: /* the does handler resides between DOES> and the following Forth code */
70: #define DOES_HANDLER_SIZE 8
71: #define MAKE_DOES_HANDLER(addr) 0 /* do nothing */
72: #endif
73:
74: #ifdef DEBUG
1.5 pazsan 75: # define NAME(string) printf("%08x: "string"\n",(int)ip);
1.1 anton 76: #else
77: # define NAME(string)
78: #endif
1.2 pazsan 79:
80: #define CF(const) (-const-2)
81:
82: #define CF_NIL -1
1.3 pazsan 83:
84: #ifndef CACHE_FLUSH
85: # define CACHE_FLUSH(addr,size)
86: #endif
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