Bell 32V release

[unix-history] / usr / src / cmd / tbl / tc.c

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