usr/othersrc/games/monop/getinp.c

/*
 * Copyright (c) 1980 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static char sccsid[] = "@(#)getinp.c    5.4 (Berkeley) 2/28/91";
#endif /* not lint */

# include       <stdio.h>
# include       <ctype.h>

# define        reg     register

# define        LINE    70

static char     buf[257];

getinp(prompt, list)
char    *prompt, *list[]; {

        reg int i, n_match, match;
        char    *sp;
        int     plen;
        static int comp();

        for (;;) {
inter:
                printf(prompt);
                for (sp = buf; (*sp=getchar()) != '\n'; )
                        if (*sp == -1)  /* check for interupted system call */
                                goto inter;
                        else if (sp != buf || *sp != ' ')
                                sp++;
                if (buf[0] == '?' && buf[1] == '\n') {
                        printf("Valid inputs are: ");
                        for (i = 0, match = 18; list[i]; i++) {
                                if ((match+=(n_match=strlen(list[i]))) > LINE) {
                                        printf("\n\t");
                                        match = n_match + 8;
                                }
                                if (*list[i] == '\0') {
                                        match += 8;
                                        printf("<RETURN>");
                                }
                                else
                                        printf(list[i]);
                                if (list[i+1])
                                        printf(", ");
                                else
                                        putchar('\n');
                                match += 2;
                        }
                        continue;
                }
                *sp = '\0';
                for (sp = buf; *sp; sp++)
                        if (isupper(*sp))
                                *sp = tolower(*sp);
                for (i = n_match = 0; list[i]; i++)
                        if (comp(list[i])) {
                                n_match++;
                                match = i;
                        }
                if (n_match == 1)
                        return match;
                else if (buf[0] != '\0')
                        printf("Illegal response: \"%s\".  Use '?' to get list of valid answers\n", buf);
        }
}

static
comp(s1)
char    *s1; {

        reg char        *sp, *tsp, c;

        if (buf[0] != '\0')
                for (sp = buf, tsp = s1; *sp; ) {
                        c = isupper(*tsp) ? tolower(*tsp) : *tsp;
                        tsp++;
                        if (c != *sp++)
                                return 0;
                }
        else if (*s1 != '\0')
                return 0;
        return 1;
}