/*      $OpenBSD: room.c,v 1.11 2015/12/31 17:51:19 mestre Exp $        */
/*      $NetBSD: room.c,v 1.3 1995/03/21 15:07:54 cgd Exp $     */

/*
 * Copyright (c) 1983, 1993
 *      The 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. 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.
 */

#include <stdio.h>

#include "extern.h"

void
writedes(void)
{
        int     compass;
        const char   *p;
        int     c;

        printf("\n\t%s\n", location[position].name);
        if (beenthere[position] < ROOMDESC || verbose) {
                compass = NORTH;
                for (p = location[position].desc; (c = *p++) != 0;)
                        if (c != '-' && c != '*' && c != '+') {
                                if (c == '=')
                                        putchar('-');
                                else
                                        putchar(c);
                        } else {
                                if (c != '*')
                                        printf("%s", truedirec(compass, c));
                                compass++;
                        }
        }
}

void
printobjs(void)
{
        unsigned int *p = location[position].objects;
        int     n;

        printf("\n");
        for (n = 0; n < NUMOFOBJECTS; n++)
                if (TestBit(p, n) && objdes[n])
                        puts(objdes[n]);
}

void
whichway(struct room here)
{
        switch (direction) {

        case NORTH:
                left = here.west;
                right = here.east;
                ahead = here.north;
                back = here.south;
                break;

        case SOUTH:
                left = here.east;
                right = here.west;
                ahead = here.south;
                back = here.north;
                break;

        case EAST:
                left = here.north;
                right = here.south;
                ahead = here.east;
                back = here.west;
                break;

        case WEST:
                left = here.south;
                right = here.north;
                ahead = here.west;
                back = here.east;
                break;

        }
}

const char   *
truedirec(int way, char option)
{
        switch (way) {

        case NORTH:
                switch (direction) {
                case NORTH:
                        return ("ahead");
                case SOUTH:
                        return (option == '+' ? "behind you" : "back");
                case EAST:
                        return ("left");
                case WEST:
                        return ("right");
                }

        case SOUTH:
                switch (direction) {
                case NORTH:
                        return (option == '+' ? "behind you" : "back");
                case SOUTH:
                        return ("ahead");
                case EAST:
                        return ("right");
                case WEST:
                        return ("left");
                }

        case EAST:
                switch (direction) {
                case NORTH:
                        return ("right");
                case SOUTH:
                        return ("left");
                case EAST:
                        return ("ahead");
                case WEST:
                        return (option == '+' ? "behind you" : "back");
                }

        case WEST:
                switch (direction) {
                case NORTH:
                        return ("left");
                case SOUTH:
                        return ("right");
                case EAST:
                        return (option == '+' ? "behind you" : "back");
                case WEST:
                        return ("ahead");
                }

        default:
                printf("Error: room %d.  More than four directions wanted.", position);
                return ("!!");
        }
}

void
newway(int thisway)
{
        switch (direction) {

        case NORTH:
                switch (thisway) {
                case LEFT:
                        direction = WEST;
                        break;
                case RIGHT:
                        direction = EAST;
                        break;
                case BACK:
                        direction = SOUTH;
                        break;
                }
                break;
        case SOUTH:
                switch (thisway) {
                case LEFT:
                        direction = EAST;
                        break;
                case RIGHT:
                        direction = WEST;
                        break;
                case BACK:
                        direction = NORTH;
                        break;
                }
                break;
        case EAST:
                switch (thisway) {
                case LEFT:
                        direction = NORTH;
                        break;
                case RIGHT:
                        direction = SOUTH;
                        break;
                case BACK:
                        direction = WEST;
                        break;
                }
                break;
        case WEST:
                switch (thisway) {
                case LEFT:
                        direction = SOUTH;
                        break;
                case RIGHT:
                        direction = NORTH;
                        break;
                case BACK:
                        direction = EAST;
                        break;
                }
                break;
        }
}