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/* tc.c: find character not in table to delimit fields */
# include "t.h"
void
choochar(void)
{
/* choose funny characters to delimit fields */
int had[128], ilin, icol, k;
char *s;
for (icol = 0; icol < 128; icol++)
had[icol] = 0;
F1 = F2 = 0;
for (ilin = 0; ilin < nlin; ilin++) {
if (instead[ilin])
continue;
if (fullbot[ilin])
continue;
for (icol = 0; icol < ncol; icol++) {
k = ctype(ilin, icol);
if (k == 0 || k == '-' || k == '=')
continue;
s = table[ilin][icol].col;
if (point(s))
while (*s)
had[(unsigned char)*s++] = 1;
s = table[ilin][icol].rcol;
if (point(s))
while (*s)
had[(unsigned char)*s++] = 1;
}
}
/* choose first funny character */
for (
s = "\002\003\005\006\007!%&#/?,:;<=>@`^~_{}+-*ABCDEFGHIJKMNOPQRSTUVWXYZabcdefgjkoqrstwxyz";
*s; s++) {
if (had[(unsigned char)*s] == 0) {
F1 = (unsigned char)*s;
had[F1] = 1;
break;
}
}
/* choose second funny character */
for (
s = "\002\003\005\006\007:_~^`@;,<=>#%&!/?{}+-*ABCDEFGHIJKMNOPQRSTUVWXZabcdefgjkoqrstuwxyz";
*s; s++) {
if (had[(unsigned char)*s] == 0) {
F2 = (unsigned char)*s;
break;
}
}
if (F1 == 0 || F2 == 0)
error("couldn't find characters to use for delimiters");
return;
}
int
point(char *s)
{
int ss = (int)s;
return(ss >= 128 || ss < 0);
}
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