/*
 * Copyright 1991 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/*        All Rights Reserved   */

/*
 * Copyright (c) 1980 Regents of the University of California.
 * All rights reserved. The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 */

 /* tc.c: find character not in table to delimit fields */
# include "t..c"

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)
                        {
                        if (*s > 0 && (unsigned char)*s <= 127)
                                had[*s++]=1;
                        else
                                s++;
                        }
                s=table[ilin][icol].rcol;
                if (point(s))
                while (*s)
                        {
                        if (*s > 0 && (unsigned char)*s <= 127)
                                had[*s++]=1;
                        else
                                s++;
                        }
                }
        }
/* 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(gettext("couldn't find characters to use for delimiters"));
return;
}

int
point(int s)
{
return(s>= 128 || s<0);
}