view rogue3/move.c @ 162:600873555ec0

Don't swap signal handlers in md_shellescape(). md_shellescape() sets SIGINT and SIGQUIT to be ignored, storing the previous handlers, and restores them after the shell exits. But it mixed up the two handlers. Since the signals were usually handled by the same function, this fix doesn't have much effect, but anything that makes signal code less confusing is a good thing.
author John "Elwin" Edwards
date Mon, 08 Jun 2015 10:01:25 -0400
parents 527e2150eaf0
children d9e44e18eeec
line wrap: on
line source

/*
 * Hero movement commands
 *
 * @(#)move.c	3.26 (Berkeley) 6/15/81
 *
 * Rogue: Exploring the Dungeons of Doom
 * Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
 * All rights reserved.
 *
 * See the file LICENSE.TXT for full copyright and licensing information.
 */

#include "curses.h"
#include <ctype.h>
#include "rogue.h"

/*
 * Used to hold the new hero position
 */

coord nh;

/*
 * do_run:
 *	Start the hero running
 */

void
do_run(int ch)
{
    running = TRUE;
    after = FALSE;
    runch = ch;
}

/*
 * do_move:
 *	Check to see that a move is legal.  If it is handle the
 * consequences (fighting, picking up, etc.)
 */

void
do_move(int dy, int dx)
{
    int ch;

    firstmove = FALSE;
    if (no_move)
    {
	no_move--;
	msg("You are still stuck in the bear trap");
	return;
    }
    /*
     * Do a confused move (maybe)
     */
    if (rnd(100) < 80 && on(player, ISHUH))
	nh = *rndmove(&player);
    else
    {
	nh.y = hero.y + dy;
	nh.x = hero.x + dx;
    }

    /*
     * Check if he tried to move off the screen or make an illegal
     * diagonal move, and stop him if he did.
     */
    if (nh.x < 0 || nh.x > COLS-1 || nh.y < 0 || nh.y > LINES - 1
	|| !diag_ok(&hero, &nh))
    {
	after = FALSE;
	running = FALSE;
	return;
    }
    if (running && ce(hero, nh))
	after = running = FALSE;
    ch = winat(nh.y, nh.x);
    if (on(player, ISHELD) && ch != 'F')
    {
	msg("You are being held");
	return;
    }
    switch(ch)
    {
	case ' ':
	case '|':
	case '-':
	case SECRETDOOR:
	    after = running = FALSE;
	    return;
	case TRAP:
	    ch = be_trapped(&nh);
	    if (ch == TRAPDOOR || ch == TELTRAP)
		return;
	    goto move_stuff;
	case GOLD:
	case POTION:
	case SCROLL:
	case FOOD:
	case WEAPON:
	case ARMOR:
	case RING:
	case AMULET:
	case STICK:
	    running = FALSE;
	    take = ch;
	default:
move_stuff:
	    if (ch == PASSAGE && winat(hero.y, hero.x) == DOOR)
		light(&hero);
	    else if (ch == DOOR)
	    {
		running = FALSE;
		if (winat(hero.y, hero.x) == PASSAGE)
		    light(&nh);
	    }
	    else if (ch == STAIRS)
		running = FALSE;
	    else if (isupper(ch))
	    {
		running = FALSE;
		fight(&nh, ch, cur_weapon, FALSE);
		return;
	    }
	    ch = winat(hero.y, hero.x);
	    wmove(cw, unc(hero));
	    waddch(cw, ch);
	    hero = nh;
	    wmove(cw, unc(hero));
	    waddch(cw, PLAYER);
    }
}

/*
 * Called to illuminate a room.
 * If it is dark, remove anything that might move.
 */

void
light(coord *cp)
{
    struct room *rp;
    int j, k;
    int ch;
    int rch;
    struct linked_list *item;

    if ((rp = roomin(cp)) != NULL && !on(player, ISBLIND))
    {
	for (j = 0; j < rp->r_max.y; j++)
	{
	    for (k = 0; k < rp->r_max.x; k++)
	    {
		ch = show(rp->r_pos.y + j, rp->r_pos.x + k);
		wmove(cw, rp->r_pos.y + j, rp->r_pos.x + k);
		/*
		 * Figure out how to display a secret door
		 */
		if (ch == SECRETDOOR)
		{
		    if (j == 0 || j == rp->r_max.y - 1)
			ch = '-';
		    else
			ch = '|';
		}
		/*
		 * If the room is a dark room, we might want to remove
		 * monsters and the like from it (since they might
		 * move)
		 */
		if (isupper(ch))
		{
		    item = wake_monster(rp->r_pos.y+j, rp->r_pos.x+k);
		    if (((struct thing *) ldata(item))->t_oldch == ' ')
			if (!(rp->r_flags & ISDARK))
			    ((struct thing *) ldata(item))->t_oldch =
				mvwinch(stdscr, rp->r_pos.y+j, rp->r_pos.x+k);
		}
		if (rp->r_flags & ISDARK)
		{
		    rch = mvwinch(cw, rp->r_pos.y+j, rp->r_pos.x+k);
		    switch (rch)
		    {
			case DOOR:
			case STAIRS:
			case TRAP:
			case '|':
			case '-':
			case ' ':
			    ch = rch;
			when FLOOR:
			    ch = (on(player, ISBLIND) ? FLOOR : ' ');
			otherwise:
			    ch = ' ';
		    }
		}
		mvwaddch(cw, rp->r_pos.y+j, rp->r_pos.x+k, ch);
	    }
	}
    }
}

/*
 * show:
 *	returns what a certain thing will display as to the un-initiated
 */

int
show(int y, int x)
{
    int ch = winat(y, x);
    struct linked_list *it;
    struct thing *tp;

    if (ch == TRAP)
	return (trap_at(y, x)->tr_flags & ISFOUND) ? TRAP : FLOOR;
    else if (ch == 'M' || ch == 'I')
    {
	if ((it = find_mons(y, x)) == NULL)
	    fatal("Can't find monster in show");
	tp = (struct thing *) ldata(it);
	if (ch == 'M')
	    ch = tp->t_disguise;
	/*
	 * Hide invisible monsters
	 */
	else if (off(player, CANSEE))
	    ch = mvwinch(stdscr, y, x);
    }
    return ch;
}

/*
 * be_trapped:
 *	The guy stepped on a trap.... Make him pay.
 */

int
be_trapped(coord *tc)
{
    struct trap *tp;
    int ch;

    tp = trap_at(tc->y, tc->x);
    count = running = FALSE;
    mvwaddch(cw, tp->tr_pos.y, tp->tr_pos.x, TRAP);
    tp->tr_flags |= ISFOUND;
    switch (ch = tp->tr_type)
    {
	case TRAPDOOR:
	    level++;
	    new_level();
	    msg("You fell into a trap!");
	when BEARTRAP:
	    no_move += BEARTIME;
	    msg("You are caught in a bear trap");
	when SLEEPTRAP:
	    no_command += SLEEPTIME;
	    msg("A strange white mist envelops you and you fall asleep");
	when ARROWTRAP:
	    if (swing(pstats.s_lvl-1, pstats.s_arm, 1))
	    {
		msg("Oh no! An arrow shot you");
		if ((pstats.s_hpt -= roll(1, 6)) <= 0)
		{
		    msg("The arrow killed you.");
		    death('a');
		}
	    }
	    else
	    {
		struct linked_list *item;
		struct object *arrow;

		msg("An arrow shoots past you.");
		item = new_item(sizeof *arrow);
		arrow = (struct object *) ldata(item);
		arrow->o_type = WEAPON;
		arrow->o_which = ARROW;
		init_weapon(arrow, ARROW);
		arrow->o_count = 1;
		arrow->o_pos = hero;
		arrow->o_hplus = arrow->o_dplus = 0; /* "arrow bug" FIX */
		fall(item, FALSE);
	    }
	when TELTRAP:
	    teleport();
	when DARTTRAP:
	    if (swing(pstats.s_lvl+1, pstats.s_arm, 1))
	    {
		msg("A small dart just hit you in the shoulder");
		if ((pstats.s_hpt -= roll(1, 4)) <= 0)
		{
		    msg("The dart killed you.");
		    death('d');
		}
		if (!ISWEARING(R_SUSTSTR))
		    chg_str(-1);
	    }
	    else
		msg("A small dart whizzes by your ear and vanishes.");
    }
    flush_type();	/* flush typeahead */
    return(ch);
}

/*
 * trap_at:
 *	find the trap at (y,x) on screen.
 */

struct trap *
trap_at(int y, int x)
{
    struct trap *tp, *ep;

    ep = &traps[ntraps];
    for (tp = traps; tp < ep; tp++)
	if (tp->tr_pos.y == y && tp->tr_pos.x == x)
	    break;
    if (tp == ep)
    {
	sprintf(prbuf, "Trap at %d,%d not in array", y, x);
	fatal(prbuf);
    }
    return tp;
}

/*
 * rndmove:
 *	move in a random direction if the monster/person is confused
 */

coord *
rndmove(struct thing *who)
{
    int x, y;
    int ch;
    int ex, ey, nopen = 0;
    struct linked_list *item;
    struct object *obj;
    static coord ret;  /* what we will be returning */
    static coord dest;

    ret = who->t_pos;
    /*
     * Now go through the spaces surrounding the player and
     * set that place in the array to true if the space can be
     * moved into
     */
    ey = ret.y + 1;
    ex = ret.x + 1;
    for (y = who->t_pos.y - 1; y <= ey; y++)
	if (y >= 0 && y < LINES)
	    for (x = who->t_pos.x - 1; x <= ex; x++)
	    {
		if (x < 0 || x >= COLS)
		    continue;
		ch = winat(y, x);
		if (step_ok(ch))
		{
		    dest.y = y;
		    dest.x = x;
		    if (!diag_ok(&who->t_pos, &dest))
			continue;
		    if (ch == SCROLL)
		    {
			item = NULL;
			for (item = lvl_obj; item != NULL; item = next(item))
			{
			    obj = (struct object *) ldata(item);
			    if (y == obj->o_pos.y && x == obj->o_pos.x)
				break;
			}
			if (item != NULL && obj->o_which == S_SCARE)
			    continue;
		    }
		    if (rnd(++nopen) == 0)
			ret = dest;
		}
	    }
    return &ret;
}