bs.c

ncurses 库 可能有用酒用 没用就算了 我觉得还可以用

	curx = nx % BWIDTH;
	cury = ny % BDEPTH;
    }
}

static bool
collidecheck(int b, int y, int x)
/* is this location on the selected zboard adjacent to a ship? */
{
    bool collide;

    /* anything on the square */
    if ((collide = IS_SHIP(board[b][x][y])) != FALSE)
	return (collide);

    /* anything on the neighbors */
    if (!closepack) {
	int i;

	for (i = 0; i < 8; i++) {
	    int xend, yend;

	    yend = y + yincr[i];
	    xend = x + xincr[i];
	    if (ONBOARD(xend, yend)
		&& IS_SHIP(board[b][xend][yend])) {
		collide = TRUE;
		break;
	    }
	}
    }
    return (collide);
}

static bool
checkplace(int b, ship_t * ss, int vis)
{
    int l, xend, yend;

    /* first, check for board edges */
    xend = ss->x + (ss->length - 1) * xincr[ss->dir];
    yend = ss->y + (ss->length - 1) * yincr[ss->dir];
    if (!ONBOARD(xend, yend)) {
	if (vis)
	    switch (rnd(3)) {
	    case 0:
		error("Ship is hanging from the edge of the world");
		break;
	    case 1:
		error("Try fitting it on the board");
		break;
	    case 2:
		error("Figure I won't find it if you put it there?");
		break;
	    }
	return (FALSE);
    }

    for (l = 0; l < ss->length; ++l) {
	if (collidecheck(b, ss->y + l * yincr[ss->dir], ss->x + l * xincr[ss->dir])) {
	    if (vis)
		switch (rnd(3)) {
		case 0:
		    error("There's already a ship there");
		    break;
		case 1:
		    error("Collision alert!  Aaaaaagh!");
		    break;
		case 2:
		    error("Er, Admiral, what about the other ship?");
		    break;
		}
	    return (FALSE);
	}
    }
    return (TRUE);
}

static int
awinna(void)
{
    int i, j;
    ship_t *ss;

    for (i = 0; i < 2; ++i) {
	ss = (i) ? cpuship : plyship;
	for (j = 0; j < SHIPTYPES; ++j, ++ss)
	    if (ss->length > ss->hits)
		break;
	if (j == SHIPTYPES)
	    return (OTHER);
    }
    return (-1);
}

static ship_t *
hitship(int x, int y)
/* register a hit on the targeted ship */
{
    ship_t *sb, *ss;
    char sym;
    int oldx, oldy;

    getyx(stdscr, oldy, oldx);
    sb = (turn) ? plyship : cpuship;
    if ((sym = board[OTHER][x][y]) == 0)
	return ((ship_t *) NULL);
    for (ss = sb; ss < sb + SHIPTYPES; ++ss)
	if (ss->symbol == sym) {
	    if (++ss->hits < ss->length)	/* still afloat? */
		return ((ship_t *) NULL);
	    else {		/* sunk! */
		int i, j;

		if (!closepack)
		    for (j = -1; j <= 1; j++) {
			int bx = ss->x + j * xincr[(ss->dir + 2) % 8];
			int by = ss->y + j * yincr[(ss->dir + 2) % 8];

			for (i = -1; i <= ss->length; ++i) {
			    int x1, y1;

			    x1 = bx + i * xincr[ss->dir];
			    y1 = by + i * yincr[ss->dir];
			    if (ONBOARD(x1, y1)) {
				hits[turn][x1][y1] = MARK_MISS;
				if (turn % 2 == PLAYER) {
				    cgoto(y1, x1);
#ifdef A_COLOR
				    if (has_colors())
					attron(COLOR_PAIR(COLOR_GREEN));
#endif /* A_COLOR */
				    (void) addch(MARK_MISS);
#ifdef A_COLOR
				    attrset(0);
#endif /* A_COLOR */
				} else {
				    pgoto(y1, x1);
				    (void) addch(SHOWSPLASH);
				}
			    }
			}
		    }

		for (i = 0; i < ss->length; ++i) {
		    int x1 = ss->x + i * xincr[ss->dir];
		    int y1 = ss->y + i * yincr[ss->dir];

		    hits[turn][x1][y1] = ss->symbol;
		    if (turn % 2 == PLAYER) {
			cgoto(y1, x1);
			(void) addch((chtype) (ss->symbol));
		    } else {
			pgoto(y1, x1);
#ifdef A_COLOR
			if (has_colors())
			    attron(COLOR_PAIR(COLOR_RED));
#endif /* A_COLOR */
			(void) addch(SHOWHIT);
#ifdef A_COLOR
			attrset(0);
#endif /* A_COLOR */
		    }
		}

		(void) move(oldy, oldx);
		return (ss);
	    }
	}
    (void) move(oldy, oldx);
    return ((ship_t *) NULL);
}

static bool
plyturn(void)
{
    ship_t *ss;
    bool hit;
    NCURSES_CONST char *m = NULL;

    prompt(1, "Where do you want to shoot? ", "");
    for (;;) {
	(void) getcoord(COMPUTER);
	if (hits[PLAYER][curx][cury]) {
	    prompt(1, "You shelled this spot already! Try again.", "");
	    beep();
	} else
	    break;
    }
    hit = IS_SHIP(board[COMPUTER][curx][cury]);
    hits[PLAYER][curx][cury] = (hit ? MARK_HIT : MARK_MISS);
    cgoto(cury, curx);
#ifdef A_COLOR
    if (has_colors()) {
	if (hit)
	    attron(COLOR_PAIR(COLOR_RED));
	else
	    attron(COLOR_PAIR(COLOR_GREEN));
    }
#endif /* A_COLOR */
    (void) addch((chtype) hits[PLAYER][curx][cury]);
#ifdef A_COLOR
    attrset(0);
#endif /* A_COLOR */

    prompt(1, "You %s.", hit ? "scored a hit" : "missed");
    if (hit && (ss = hitship(curx, cury))) {
	switch (rnd(5)) {
	case 0:
	    m = " You sank my %s!";
	    break;
	case 1:
	    m = " I have this sinking feeling about my %s....";
	    break;
	case 2:
	    m = " My %s has gone to Davy Jones's locker!";
	    break;
	case 3:
	    m = " Glub, glub -- my %s is headed for the bottom!";
	    break;
	case 4:
	    m = " You'll pick up survivors from my %s, I hope...!";
	    break;
	}
	(void) printw(m, ss->name);
	(void) beep();
	return (awinna() == -1);
    }
    return (hit);
}

static int
sgetc(const char *s)
{
    const char *s1;
    int ch;

    (void) refresh();
    for (;;) {
	ch = getch();
	if (islower(ch))
	    ch = toupper(ch);
	if (ch == CTRLC)
	    uninitgame(0);
	for (s1 = s; *s1 && ch != *s1; ++s1)
	    continue;
	if (*s1) {
	    (void) addch((chtype) ch);
	    (void) refresh();
	    return (ch);
	}
    }
}

static void
randomfire(int *px, int *py)
/* random-fire routine -- implements simple diagonal-striping strategy */
{
    static int turncount = 0;
    static int srchstep = BEGINSTEP;
    static int huntoffs;	/* Offset on search strategy */
    int ypossible[BWIDTH * BDEPTH], xpossible[BWIDTH * BDEPTH], nposs;
    int ypreferred[BWIDTH * BDEPTH], xpreferred[BWIDTH * BDEPTH], npref;
    int x, y, i;

    if (turncount++ == 0)
	huntoffs = rnd(srchstep);

    /* first, list all possible moves */
    nposs = npref = 0;
    for (x = 0; x < BWIDTH; x++)
	for (y = 0; y < BDEPTH; y++)
	    if (!hits[COMPUTER][x][y]) {
		xpossible[nposs] = x;
		ypossible[nposs] = y;
		nposs++;
		if (((x + huntoffs) % srchstep) != (y % srchstep)) {
		    xpreferred[npref] = x;
		    ypreferred[npref] = y;
		    npref++;
		}
	    }

    if (npref) {
	i = rnd(npref);

	*px = xpreferred[i];
	*py = ypreferred[i];
    } else if (nposs) {
	i = rnd(nposs);

	*px = xpossible[i];
	*py = ypossible[i];

	if (srchstep > 1)
	    --srchstep;
    } else {
	error("No moves possible?? Help!");
	ExitProgram(EXIT_FAILURE);
	/*NOTREACHED */
    }
}

#define S_MISS	0
#define S_HIT	1
#define S_SUNK	-1

static int
cpufire(int x, int y)
/* fire away at given location */
{
    bool hit, sunk;
    ship_t *ss = NULL;

    hits[COMPUTER][x][y] = (hit = (board[PLAYER][x][y])) ? MARK_HIT : MARK_MISS;
    (void) mvprintw(PROMPTLINE, 0,
		    "I shoot at %c%d. I %s!", y + 'A', x, hit ? "hit" :
		    "miss");
    if ((sunk = (hit && (ss = hitship(x, y)))) != 0)
	(void) printw(" I've sunk your %s", ss->name);
    (void) clrtoeol();

    pgoto(y, x);
#ifdef A_COLOR
    if (has_colors()) {
	if (hit)
	    attron(COLOR_PAIR(COLOR_RED));
	else
	    attron(COLOR_PAIR(COLOR_GREEN));
    }
#endif /* A_COLOR */
    (void) addch((chtype) (hit ? SHOWHIT : SHOWSPLASH));
#ifdef A_COLOR
    attrset(0);
#endif /* A_COLOR */

    return ((hit ? (sunk ? S_SUNK : S_HIT) : S_MISS) ? TRUE : FALSE);
}

/*
 * This code implements a fairly irregular FSM, so please forgive the rampant
 * unstructuredness below. The five labels are states which need to be held
 * between computer turns.
 */
static bool
cputurn(void)
{
#define POSSIBLE(x, y)	(ONBOARD(x, y) && !hits[COMPUTER][x][y])
#define RANDOM_FIRE	0
#define RANDOM_HIT	1
#define HUNT_DIRECT	2
#define FIRST_PASS	3
#define REVERSE_JUMP	4
#define SECOND_PASS	5
    static int next = RANDOM_FIRE;
    static bool used[4];
    static ship_t ts;
    int navail, x, y, d, n;
    int hit = S_MISS;

    switch (next) {
    case RANDOM_FIRE:		/* last shot was random and missed */
      refire:
	randomfire(&x, &y);
	if (!(hit = cpufire(x, y)))
	    next = RANDOM_FIRE;
	else {
	    ts.x = x;
	    ts.y = y;
	    ts.hits = 1;
	    next = (hit == S_SUNK) ? RANDOM_FIRE : RANDOM_HIT;
	}
	break;

    case RANDOM_HIT:		/* last shot was random and hit */
	used[E / 2] = used[S / 2] = used[W / 2] = used[N / 2] = FALSE;
	/* FALLTHROUGH */

    case HUNT_DIRECT:		/* last shot hit, we're looking for ship's long axis */
	for (d = navail = 0; d < 4; d++) {
	    x = ts.x + xincr[d * 2];
	    y = ts.y + yincr[d * 2];
	    if (!used[d] && POSSIBLE(x, y))
		navail++;
	    else
		used[d] = TRUE;
	}
	if (navail == 0)	/* no valid places for shots adjacent... */
	    goto refire;	/* ...so we must random-fire */
	else {
	    for (d = 0, n = rnd(navail) + 1; n; n--)
		while (used[d])
		    d++;

	    assert(d <= 4);

	    used[d] = FALSE;
	    x = ts.x + xincr[d * 2];
	    y = ts.y + yincr[d * 2];

	    assert(POSSIBLE(x, y));

	    if (!(hit = cpufire(x, y)))
		next = HUNT_DIRECT;
	    else {
		ts.x = x;
		ts.y = y;
		ts.dir = d * 2;
		ts.hits++;
		next = (hit == S_SUNK) ? RANDOM_FIRE : FIRST_PASS;
	    }
	}
	break;

    case FIRST_PASS:		/* we have a start and a direction now */
	x = ts.x + xincr[ts.dir];
	y = ts.y + yincr[ts.dir];
	if (POSSIBLE(x, y) && (hit = cpufire(x, y))) {
	    ts.x = x;
	    ts.y = y;
	    ts.hits++;
	    next = (hit == S_SUNK) ? RANDOM_FIRE : FIRST_PASS;
	} else
	    next = REVERSE_JUMP;
	break;

    case REVERSE_JUMP:		/* nail down the ship's other end */
	d = ts.dir + 4;
	x = ts.x + ts.hits * xincr[d];
	y = ts.y + ts.hits * yincr[d];
	if (POSSIBLE(x, y) && (hit = cpufire(x, y))) {
	    ts.x = x;
	    ts.y = y;
	    ts.dir = d;
	    ts.hits++;
	    next = (hit == S_SUNK) ? RANDOM_FIRE : SECOND_PASS;
	} else
	    next = RANDOM_FIRE;
	break;

    case SECOND_PASS:		/* kill squares not caught on first pass */
	x = ts.x + xincr[ts.dir];
	y = ts.y + yincr[ts.dir];
	if (POSSIBLE(x, y) && (hit = cpufire(x, y))) {
	    ts.x = x;
	    ts.y = y;
	    ts.hits++;
	    next = (hit == S_SUNK) ? RANDOM_FIRE : SECOND_PASS;
	    break;
	} else
	    next = RANDOM_FIRE;
	break;
    }

    /* check for continuation and/or winner */
    if (salvo) {
	(void) refresh();
	(void) sleep(1);
    }
    if (awinna() != -1)
	return (FALSE);

#ifdef DEBUG
    (void) mvprintw(PROMPTLINE + 2, 0,
		    "New state %d, x=%d, y=%d, d=%d",
		    next, x, y, d);
#endif /* DEBUG */
    return ((hit) ? TRUE : FALSE);
}

static int
playagain(void)
{
    int j;
    ship_t *ss;

    for (ss = cpuship; ss < cpuship + SHIPTYPES; ss++)
	for (j = 0; j < ss->length; j++) {
	    cgoto(ss->y + j * yincr[ss->dir], ss->x + j * xincr[ss->dir]);
	    (void) addch((chtype) ss->symbol);
	}

    if (awinna())
	++cpuwon;
    else
	++plywon;
    j = 18 + strlen(name);
    if (plywon >= 10)
	++j;
    if (cpuwon >= 10)
	++j;
    (void) mvprintw(1, (COLWIDTH - j) / 2,
		    "%s: %d     Computer: %d", name, plywon, cpuwon);

    prompt(2, (awinna())? "Want to be humiliated again, %s [yn]? "
	   : "Going to give me a chance for revenge, %s [yn]? ", name);
    return (sgetc("YN") == 'Y');
}

static void
do_options(int c, char *op[])
{
    register int i;

    if (c > 1) {
	for (i = 1; i < c; i++) {
	    switch (op[i][0]) {
	    default:
	    case '?':
		(void) fprintf(stderr, "Usage: battle [-s | -b] [-c]\n");
		(void) fprintf(stderr, "\tWhere the options are:\n");
		(void) fprintf(stderr, "\t-s : play a salvo game\n");
		(void) fprintf(stderr, "\t-b : play a blitz game\n");
		(void) fprintf(stderr, "\t-c : ships may be adjacent\n");
		ExitProgram(EXIT_FAILURE);
		break;
	    case '-':
		switch (op[i][1]) {
		case 'b':
		    blitz = 1;
		    if (salvo == 1) {
			(void) fprintf(stderr,
				       "Bad Arg: -b and -s are mutually exclusive\n");
			ExitProgram(EXIT_FAILURE);
		    }
		    break;
		case 's':
		    salvo = 1;
		    if (blitz == 1) {
			(void) fprintf(stderr,
				       "Bad Arg: -s and -b are mutually exclusive\n");
			ExitProgram(EXIT_FAILURE);
		    }
		    break;
		case 'c':
		    closepack = 1;
		    break;
		default:
		    (void) fprintf(stderr,
				   "Bad arg: type \"%s ?\" for usage message\n",
				   op[0]);
		    ExitProgram(EXIT_FAILURE);
		}
	    }
	}
    }
}

static int
scount(int who)
{
    register int i, shots;
    register ship_t *sp;

    if (who)
	sp = cpuship;		/* count cpu shots */
    else
	sp = plyship;		/* count player shots */

    for (i = 0, shots = 0; i < SHIPTYPES; i++, sp++) {
	if (sp->hits >= sp->length)
	    continue;		/* dead ship */
	else
	    shots++;
    }
    return (shots);
}

int
main(int argc, char *argv[])
{
    setlocale(LC_ALL, "");

    do_options(argc, argv);

    intro();
    do {
	initgame();
	while (awinna() == -1) {
	    if (!blitz) {
		if (!salvo) {
		    if (turn)
			(void) cputurn();
		    else
			(void) plyturn();
		} else {
		    register int i;

		    i = scount(turn);
		    while (i--) {
			if (turn) {
			    if (cputurn() && awinna() != -1)
				i = 0;
			} else {
			    if (plyturn() && awinna() != -1)
				i = 0;
			}
		    }
		}
	    } else
		while (turn ? cputurn() : plyturn())
		    continue;
	    turn = OTHER;
	}
    } while
	(playagain());
    uninitgame(0);
    /*NOTREACHED */
}

/* bs.c ends here */