bs.c

一个C格式的脚本处理函数库源代码,可让你的C程序具有执行C格式的脚本文件

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

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

    /* anything on the square */
    if ((collide = IS_SHIP(board[b][x][y])) != 0)
	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))
		collide += IS_SHIP(board[b][xend][yend]);
	}
    }
    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 * xincr[ss->dir];
    yend = ss->y + ss->length * 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(0);
    }

    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]))
	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 */
				}
			    }
			}
		    }

		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));
		    }
		}

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

static int plyturn(void)
{
    ship_t *ss;
    bool hit;
    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 my %s, I hope...!";
	    break;
	}
	(void)printw(m, ss->name);
	(void)beep();
	return(awinna() == -1);
    }
    return(hit);
}

static int sgetc(char *s)
{
    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!");
	exit(1);
	/*NOTREACHED*/
    }
}

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

static bool 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)))))
	(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);
}

/*
 * 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, 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);
}

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");
		exit(1);
		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");
			exit(1);
		    }
		    break;
		case 's':
		    salvo = 1;
		    if (blitz == 1)
		    {
			(void) fprintf(stderr,
				"Bad Arg: -s and -b are mutually exclusive\n");
			exit(1);
		    }
		    break;
		case 'c':
		    closepack = 1;
		    break;
		default:
		    (void) fprintf(stderr,
			    "Bad arg: type \"%s ?\" for usage message\n", op[0]);
		    exit(1);
		}
	    }
	}
    }
}

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[])
{
    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*/
   return 1;
}

/* bs.c ends here */