Annotation of gforth/forth.h, revision 1.7
1.1 anton 1: /*
1.7 ! anton 2: $Id: forth.h,v 1.6 1994/05/31 07:25:12 benschop 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
16: #define DODOES 4
17: #define DOESJUMP 5
1.6 benschop 18:
19: /* Some versions of some unices (Linux) have the symbol BIG_ENDIAN defined
20: in their standard headers. Make sure it's undefined -- Lennart */
21: #ifdef BIG_ENDIAN
22: #undef BIG_ENDIAN
23: #endif
1.2 pazsan 24:
1.1 anton 25: #include "machine.h"
26:
27: /* Forth data types */
28: typedef int Bool;
29: #define FLAG(b) (-(b))
1.5 pazsan 30: #define FILEIO(error) (FLAG(error) & -37)
31: #define FILEEXIST(error) (FLAG(error) & -38)
1.1 anton 32:
33: #define F_TRUE (FLAG(0==0))
34: #define F_FALSE (FLAG(0!=0))
35:
36: typedef unsigned char Char;
37: typedef double Float;
38: typedef char *Address;
39:
40: #ifdef DIRECT_THREADED
41: typedef Label Xt;
42: #else
43: typedef Label *Xt;
44: #endif
45:
1.4 anton 46: Label *engine(Xt *ip, Cell *sp, Cell *rp, Float *fp, Address lp);
1.7 ! anton 47: extern Xt *throw_ip;
1.1 anton 48:
49: #ifndef DIRECT_THREADED
50: /* i.e. indirect threaded */
51: /* the direct threaded version is machine dependent and resides in machine.h */
52:
53: /* PFA gives the parameter field address corresponding to a cfa */
54: #define PFA(cfa) (((Cell *)cfa)+2)
55: /* PFA1 is a special version for use just after a NEXT1 */
56: #define PFA1(cfa) PFA(cfa)
57: /* CODE_ADDRESS is the address of the code jumped to through the code field */
58: #define CODE_ADDRESS(cfa) (*(Label *)(cfa))
59: /* DOES_CODE is the Forth code does jumps to */
60: #define DOES_CODE(cfa) (cfa[1])
61: #define DOES_CODE1(cfa) DOES_CODE(cfa)
62: /* MAKE_CF creates an appropriate code field at the cfa;
63: ca is the code address */
64: #define MAKE_CF(cfa,ca) ((*(Label *)(cfa)) = ((Label)ca))
65: /* make a code field for a defining-word-defined word */
1.2 pazsan 66: #define MAKE_DOES_CF(cfa,does_code) ({MAKE_CF(cfa,symbols[DODOES]); \
1.1 anton 67: ((Cell *)cfa)[1] = (Cell)does_code;})
68: /* the does handler resides between DOES> and the following Forth code */
69: #define DOES_HANDLER_SIZE 8
70: #define MAKE_DOES_HANDLER(addr) 0 /* do nothing */
71: #endif
72:
73: #ifdef DEBUG
1.5 pazsan 74: # define NAME(string) printf("%08x: "string"\n",(int)ip);
1.1 anton 75: #else
76: # define NAME(string)
77: #endif
1.2 pazsan 78:
79: #define CF(const) (-const-2)
80:
81: #define CF_NIL -1
1.3 pazsan 82:
83: #ifndef CACHE_FLUSH
84: # define CACHE_FLUSH(addr,size)
85: #endif
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