1 /* tc.c: find character not in table to delimit fields */
2 # include "t.h"
3 
4 void
5 choochar(void)
6 {
7 				/* choose funny characters to delimit fields */
8 	int	had[128], ilin, icol, k;
9 	char	*s;
10 
11 	for (icol = 0; icol < 128; icol++)
12 		had[icol] = 0;
13 	F1 = F2 = 0;
14 	for (ilin = 0; ilin < nlin; ilin++) {
15 		if (instead[ilin]) 
16 			continue;
17 		if (fullbot[ilin]) 
18 			continue;
19 		for (icol = 0; icol < ncol; icol++) {
20 			k = ctype(ilin, icol);
21 			if (k == 0 || k == '-' || k == '=')
22 				continue;
23 			s = table[ilin][icol].col;
24 			if (point(s))
25 				while (*s)
26 					had[(unsigned char)*s++] = 1;
27 			s = table[ilin][icol].rcol;
28 			if (point(s))
29 				while (*s)
30 					had[(unsigned char)*s++] = 1;
31 		}
32 	}
33 				/* choose first funny character */
34 	for (
35 	    s = "\002\003\005\006\007!%&#/?,:;<=>@`^~_{}+-*ABCDEFGHIJKMNOPQRSTUVWXYZabcdefgjkoqrstwxyz"; 
36 	    *s; s++) {
37 		if (had[(unsigned char)*s] == 0) {
38 			F1 = (unsigned char)*s;
39 			had[F1] = 1;
40 			break;
41 		}
42 	}
43 				/* choose second funny character */
44 	for (
45 	    s = "\002\003\005\006\007:_~^`@;,<=>#%&!/?{}+-*ABCDEFGHIJKMNOPQRSTUVWXZabcdefgjkoqrstuwxyz"; 
46 	    *s; s++) {
47 		if (had[(unsigned char)*s] == 0) {
48 			F2 = (unsigned char)*s;
49 			break;
50 		}
51 	}
52 	if (F1 == 0 || F2 == 0)
53 		error("couldn't find characters to use for delimiters");
54 	return;
55 }
56 
57 
58 int
59 point(char *s)
60 {
61 	int	ss = (int)s;
62 	return(ss >= 128 || ss < 0);
63 }
64 
65