1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
/* yForth? - Written by Luca Padovani (C) 1996/97
* ------------------------------------------------------------------------
* This software is FreeWare as long as it comes with this header in each
* source file, anyway you can use it or any part of it whatever
* you want. It comes without any warranty, so use it at your own risk.
* ------------------------------------------------------------------------
* Module name:
* Abstract:
*/
#include <string.h>
#include <ctype.h>
#include "yforth.h"
#include "string.h"
#include "core.h"
/**************************************************************************/
/* WORDS ******************************************************************/
/**************************************************************************/
void _dash_trailing() {
register Char *s = (Char *) sp[1];
register int i = sp[0];
while (i-- > 0) if (!isspace(s[i])) break;
sp[0] = i + 1;
}
void _slash_string() {
register Cell n = *sp++;
sp[1] = (Cell) ((Char *) sp[1] + n);
sp[0] -= n;
}
void _blank() {
register UCell u = (UCell) *sp++;
register Char *s = (Char *) *sp++;
if (u) memset(s, ' ', u);
}
void _c_move() {
register UCell u = (UCell) *sp++;
register Char *dest = (Char *) *sp++;
register Char *source = (Char *) *sp++;
while (u--) *dest++ = *source++;
}
void _c_move_up() {
register UCell u = (UCell) *sp++;
register Char *dest = (Char *) *sp++ + u;
register Char *source = (Char *) *sp++ + u;
while (u--) *--dest = *--source;
}
void _compare() {
register UCell u2 = (UCell) *sp++;
register Char *s2 = (Char *) *sp++;
register UCell u1 = (UCell) *sp++;
register Char *s1 = (Char *) *sp;
register UCell m = u2 <= u1 ? u2 : u1;
while (m) {
if (*s1 != *s2) break;
s1++;
s2++;
m--;
}
if (u1 == u2 && !m) *sp = 0;
else if (!m) *sp = u1 < u2 ? -1 : 1;
else *sp = *s1 < *s2 ? -1 : 1;
}
void _search() {
register UCell u2 = (UCell) *sp++;
register Char *s2 = (Char *) sp[0];
register UCell u1 = (UCell) sp[1];
register Char *s1 = (Char *) sp[2];
if (u2 > u1) *sp = FFLAG(0);
else {
while (u1 >= u2) {
*--sp = (Cell) s1;
*--sp = (Cell) u1;
*--sp = (Cell) s2;
*--sp = (Cell) u2;
_compare();
if (!(*sp++)) {
sp[2] = (Cell) s1;
sp[1] = (Cell) u1;
sp[0] = FFLAG(1);
break;
} else {
s1++;
u1--;
}
}
}
}
void _s_literal() {
register UCell u = (UCell) *sp++;
register Char *s = (Char *) *sp++;
compile_cell((Cell) _do_literal);
compile_cell((Cell) s);
compile_cell((Cell) _do_literal);
compile_cell((Cell) u);
}
|
