usr/src/games/sail/dr_2.c

#ifndef lint
static	char *sccsid = "@(#)dr_2.c	1.6 83/10/27";
#endif

#include "driver.h"

#define couldwin(f,t) (f->specs->crew2 > t->specs->crew2 * 1.5)

thinkofgrapples()
{
	register struct ship *sp, *sq;
	char friendly;

	foreachship(sp) {
		if (sp->file->captain[0] || sp->file->dir == 0)
			continue;
		foreachship(sq) {
			friendly = sp->nationality == capship(sq)->nationality;
			if (!friendly) {
				if (sp->file->struck || sp->file->captured != 0)
					continue;
				if (range(sp, sq) != 1)
					continue;
				if (grappled2(sp, sq))
					if (toughmelee(sp, sq, 0, 0))
						ungrap(sp, sq);
					else
						grap(sp, sq);
				else if (couldwin(sp, sq)) {
					grap(sp, sq);
					sp->file->loadwith = L_GRAPE;
				}
			} else
				ungrap(sp, sq);
		}
	}
}

checkup()
{
	register int k;
	register struct ship *sp, *sq;
	register char explode, sink;

	/*
	readpos();
	*/
	foreachship(sp) {
		explode = sp->file->explode;
		sink = sp->file->sink;
		if (die() < 5)
			continue;
		if (explode != 1 && sink != 1)
			continue;
		Write(sink ? W_SINK : W_EXPLODE, sp, 0, 2, 0, 0, 0);
		sp->file->dir = 0;	/* hopefully enough to kill ship */
		/* Write(n, 0, 10, 0); XXX */
		Write(W_CLASS, sp, 0, 0, 0, 0, 0);
		if (fouled(sp) || grappled(sp)) {
			for (k = 0; k < NSHIP; k++) {
				if (sp->file->fouls[k].turnfoul)
					cleanfoul(sp,
						sp->file->fouls[k].toship, k);
			}
			for (k = 0; k < NSHIP; k++) {
				if (sp->file->grapples[k].turnfoul)
					cleangrapple(sp,
						sp->file->grapples[k].toship,
						k);
			}
		}
		if (sink != 1) {
			makesignal(sp, "exploding!", (struct ship *)0);
			foreachship(sq) {
				if (sp != sq && sq->file->dir && range(sp, sq) < 4)
					table(RIGGING, L_EXPLODE, sp->specs->guns/13, sq, sp, 6);
			}
		} else
			makesignal(sp, "sinking!", (struct ship *)0);
	}
}

prizecheck()
{
	register struct ship *sp;
	register int prisoners, points;

	foreachship(sp) {
		if (sp->file->captured == 0)
			continue;
		if (sp->file->struck || sp->file->dir == 0)
			continue;
		prisoners = sp->specs->crew1 + sp->specs->crew2 + sp->specs->crew3;
		if (prisoners > sp->file->pcrew * 6) {
			Write(W_CAPTURED, sp, 0, -1, 0, 0, 0);
			Write(W_SIGNAL, sp, 1,
				(int)"prize crew overthrown", 0, 0, 0);
			points = sp->file->captured->file->points
				- 2 * sp->specs->pts;
			Write(W_POINTS, sp->file->captured, 0, points, 0, 0, 0);
		}
	}
}

strend(str)
char *str;
{
	register char *p;

	for (p = str; *p; p++)
		;
	return p == str ? 0 : p[-1];
}

closeon(from, to, command, ta, ma, af)
register struct ship *from, *to;
char command[];
int ma, ta, af;
{
	int high;
	char temp[10];

	temp[0] = command[0] = '\0';
	high = -30000;
	try(command, temp, ma, ta, af, ma, from->file->dir, from, to, &high, 0);
}

int dtab[] = {0,1,1,2,3,4,4,5};		/* diagonal distances in x==y */

score(movement, ship, to, onlytemp)
char movement[];
register struct ship *ship, *to;
char onlytemp;
{
	char drift;
	int row, col, dir, total, ran;
	register struct File *fp = ship->file;

	if ((dir = fp->dir) == 0)
		return 0;
	row = fp->row;
	col = fp->col;
	drift = fp->drift;
	move(movement, ship, &fp->dir, &fp->row, &fp->col, &drift);
	if (!*movement)
		(void) strcpy(movement, "d");

	ran = range(ship, to);
	total = -50 * ran;
	if (ran < 4 && gunsbear(ship, to))
		total += 60;
	if ((ran = portside(ship, to, 1) - fp->dir) == 4 || ran == -4)
		total = -30000;

	if (!onlytemp) {
		fp->row = row;
		fp->col = col;
		fp->dir = dir;
	}
	return total;
}

moveship(ship, movement)
struct ship *ship;
char *movement;
{
	register struct File *fp = ship->file;
	char drift = fp->drift;
	int row = fp->row;
	int col = fp->col;
	int dir = fp->dir;

	if (fp->dir == 0)
		return;
	move(movement, ship, &fp->dir, &fp->row, &fp->col, &drift);
	if (drift > 2 || *movement == 0)
		(void) strcat(movement, "d");
	if (fp->drift != drift)
		Write(W_DRIFT, ship, 0, drift, 0, 0, 0);
	if (fp->row != row)
		Write(W_SHIPROW, ship, 0, fp->row, 0, 0, 0);
	if (fp->col != col)
		Write(W_SHIPCOL, ship, 0, fp->col, 0, 0, 0);
	if (fp->dir != dir)
		Write(W_SHIPDIR, ship, 0, fp->dir, 0, 0, 0);
}

move(p, ship, dir, row, col, drift)
register char *p;
register struct ship *ship;
register char *dir;
register short *row, *col;
register char *drift;
{
	int dist;
	char moved = 0;

	for (; *p; p++) {
		switch (*p) {
		case 'r':
			if (++*dir == 9)
				*dir = 1;
			break;
		case 'l':
			if (--*dir == 0)
				*dir = 8;
			break;
		case '1': case '2': case '3': case '4':
		case '5': case '6': case '7':
			moved++;
			if (*dir % 2 == 0)
				dist = dtab[*p - '0'];
			else
				dist = *p - '0';
			*row -= dr[*dir] * dist;
			*col -= dc[*dir] * dist;
			break;
		}
	}
	if (!windspeed)
		*drift = 1;
	if (!moved) {
		if (++*drift > 2) {
			if (ship->specs->class >= 3 && !snagged(ship)
			    || (turn & 1) == 0) {
				*row -= dr[winddir];
				*col -= dc[winddir];
			}
		}
	} else
		*drift = 0;
}

try(command, temp, ma, ta, af, vma, dir, f, t, high, rakeme)
register struct ship *f, *t;
int ma, ta, af, *high, rakeme;
char command[], temp[];
{
	register int new, n;
	char st[4];
#define rakeyou (gunsbear(f, t) && !gunsbear(t, f))

	if ((n = strend(temp)) < '1' || n > '9')
		for (n = 1; vma - n >= 0; n++) {
			(void) sprintf(st, "%d", n);
			(void) strcat(temp, st);
			new = score(temp, f, t, rakeme);
			if (new > *high && (!rakeme || rakeyou)) {
				*high = new;
				(void) strcpy(command, temp);
			}
			try(command, temp, ma-n, ta, af, vma-n,
				dir, f, t, high, rakeme);
			rmend(temp);
		}
	if (ma > 0 && ta > 0 && (n = strend(temp)) != 'l' && n != 'r' || !strlen(temp)) {
		(void) strcat(temp, "r");
		new = score(temp, f, t, rakeme);
		if (new > *high && (!rakeme || gunsbear(f, t) && !gunsbear(t, f))) {
			*high = new;
			(void) strcpy(command, temp);
		}
		try(command, temp, ma-1, ta-1, af, min(ma-1, maxmove(f, (dir == 8 ? 1 : dir+1), 0)), (dir == 8 ? 1 : dir+1),f,t,high,rakeme);
		rmend(temp);
	}
	if ((ma > 0 && ta > 0 && (n = strend(temp)) != 'l' && n != 'r') || !strlen(temp)){
		(void) strcat(temp, "l");
		new = score(temp, f, t, rakeme);
		if (new > *high && (!rakeme || (gunsbear(f, t) && !gunsbear(t, f)))){
			*high = new;
			(void) strcpy(command, temp);
		}
		try(command, temp, ma-1, ta-1, af, (min(ma-1,maxmove(f, (dir-1 ? dir-1 : 8), 0))), (dir-1 ? dir -1 : 8), f, t, high, rakeme);
		rmend(temp);
	}
}

rmend(str)
char *str;
{
	register char *p;

	for (p = str; *p; p++)
		;
	if (p != str)
		*--p = 0;
}
Commit	Line	Data
	1	#ifndef lint
	2	static char *sccsid = "@(#)dr_2.c 1.6 83/10/27";
	3	#endif
	4
	5	#include "driver.h"
	6
	7	#define couldwin(f,t) (f->specs->crew2 > t->specs->crew2 * 1.5)
	8
	9	thinkofgrapples()
	10	{
	11	register struct ship sp, sq;
	12	char friendly;
	13
	14	foreachship(sp) {
	15	if (sp->file->captain[0] \|\| sp->file->dir == 0)
	16	continue;
	17	foreachship(sq) {
	18	friendly = sp->nationality == capship(sq)->nationality;
	19	if (!friendly) {
	20	if (sp->file->struck \|\| sp->file->captured != 0)
	21	continue;
	22	if (range(sp, sq) != 1)
	23	continue;
	24	if (grappled2(sp, sq))
	25	if (toughmelee(sp, sq, 0, 0))
	26	ungrap(sp, sq);
	27	else
	28	grap(sp, sq);
	29	else if (couldwin(sp, sq)) {
	30	grap(sp, sq);
	31	sp->file->loadwith = L_GRAPE;
	32	}
	33	} else
	34	ungrap(sp, sq);
	35	}
	36	}
	37	}
	38
	39	checkup()
	40	{
	41	register int k;
	42	register struct ship sp, sq;
	43	register char explode, sink;
	44
	45	/*
	46	readpos();
	47	*/
	48	foreachship(sp) {
	49	explode = sp->file->explode;
	50	sink = sp->file->sink;
	51	if (die() < 5)
	52	continue;
	53	if (explode != 1 && sink != 1)
	54	continue;
	55	Write(sink ? W_SINK : W_EXPLODE, sp, 0, 2, 0, 0, 0);
	56	sp->file->dir = 0; /* hopefully enough to kill ship */
	57	/* Write(n, 0, 10, 0); XXX */
	58	Write(W_CLASS, sp, 0, 0, 0, 0, 0);
	59	if (fouled(sp) \|\| grappled(sp)) {
	60	for (k = 0; k < NSHIP; k++) {
	61	if (sp->file->fouls[k].turnfoul)
	62	cleanfoul(sp,
	63	sp->file->fouls[k].toship, k);
	64	}
	65	for (k = 0; k < NSHIP; k++) {
	66	if (sp->file->grapples[k].turnfoul)
	67	cleangrapple(sp,
	68	sp->file->grapples[k].toship,
	69	k);
	70	}
	71	}
	72	if (sink != 1) {
	73	makesignal(sp, "exploding!", (struct ship *)0);
	74	foreachship(sq) {
	75	if (sp != sq && sq->file->dir && range(sp, sq) < 4)
	76	table(RIGGING, L_EXPLODE, sp->specs->guns/13, sq, sp, 6);
	77	}
	78	} else
	79	makesignal(sp, "sinking!", (struct ship *)0);
	80	}
	81	}
	82
	83	prizecheck()
	84	{
	85	register struct ship *sp;
	86	register int prisoners, points;
	87
	88	foreachship(sp) {
	89	if (sp->file->captured == 0)
	90	continue;
	91	if (sp->file->struck \|\| sp->file->dir == 0)
	92	continue;
	93	prisoners = sp->specs->crew1 + sp->specs->crew2 + sp->specs->crew3;
	94	if (prisoners > sp->file->pcrew * 6) {
	95	Write(W_CAPTURED, sp, 0, -1, 0, 0, 0);
	96	Write(W_SIGNAL, sp, 1,
	97	(int)"prize crew overthrown", 0, 0, 0);
	98	points = sp->file->captured->file->points
	99	- 2 * sp->specs->pts;
	100	Write(W_POINTS, sp->file->captured, 0, points, 0, 0, 0);
	101	}
	102	}
	103	}
	104
	105	strend(str)
	106	char *str;
	107	{
	108	register char *p;
	109
	110	for (p = str; *p; p++)
	111	;
	112	return p == str ? 0 : p[-1];
	113	}
	114
	115	closeon(from, to, command, ta, ma, af)
	116	register struct ship from, to;
	117	char command[];
	118	int ma, ta, af;
	119	{
	120	int high;
	121	char temp[10];
	122
	123	temp[0] = command[0] = '\0';
	124	high = -30000;
	125	try(command, temp, ma, ta, af, ma, from->file->dir, from, to, &high, 0);
	126	}
	127
	128	int dtab[] = {0,1,1,2,3,4,4,5}; /* diagonal distances in x==y */
	129
	130	score(movement, ship, to, onlytemp)
	131	char movement[];
	132	register struct ship ship, to;
	133	char onlytemp;
	134	{
	135	char drift;
	136	int row, col, dir, total, ran;
	137	register struct File *fp = ship->file;
	138
	139	if ((dir = fp->dir) == 0)
	140	return 0;
	141	row = fp->row;
	142	col = fp->col;
	143	drift = fp->drift;
	144	move(movement, ship, &fp->dir, &fp->row, &fp->col, &drift);
	145	if (!*movement)
	146	(void) strcpy(movement, "d");
	147
	148	ran = range(ship, to);
	149	total = -50 * ran;
	150	if (ran < 4 && gunsbear(ship, to))
	151	total += 60;
	152	if ((ran = portside(ship, to, 1) - fp->dir) == 4 \|\| ran == -4)
	153	total = -30000;
	154
	155	if (!onlytemp) {
	156	fp->row = row;
	157	fp->col = col;
	158	fp->dir = dir;
	159	}
	160	return total;
	161	}
	162
	163	moveship(ship, movement)
	164	struct ship *ship;
	165	char *movement;
	166	{
	167	register struct File *fp = ship->file;
	168	char drift = fp->drift;
	169	int row = fp->row;
	170	int col = fp->col;
	171	int dir = fp->dir;
	172
	173	if (fp->dir == 0)
	174	return;
	175	move(movement, ship, &fp->dir, &fp->row, &fp->col, &drift);
	176	if (drift > 2 \|\| *movement == 0)
	177	(void) strcat(movement, "d");
	178	if (fp->drift != drift)
	179	Write(W_DRIFT, ship, 0, drift, 0, 0, 0);
	180	if (fp->row != row)
	181	Write(W_SHIPROW, ship, 0, fp->row, 0, 0, 0);
	182	if (fp->col != col)
	183	Write(W_SHIPCOL, ship, 0, fp->col, 0, 0, 0);
	184	if (fp->dir != dir)
	185	Write(W_SHIPDIR, ship, 0, fp->dir, 0, 0, 0);
	186	}
	187
	188	move(p, ship, dir, row, col, drift)
	189	register char *p;
	190	register struct ship *ship;
	191	register char *dir;
	192	register short row, col;
	193	register char *drift;
	194	{
	195	int dist;
	196	char moved = 0;
	197
	198	for (; *p; p++) {
	199	switch (*p) {
	200	case 'r':
	201	if (++*dir == 9)
	202	*dir = 1;
	203	break;
	204	case 'l':
	205	if (--*dir == 0)
	206	*dir = 8;
	207	break;
	208	case '1': case '2': case '3': case '4':
	209	case '5': case '6': case '7':
	210	moved++;
	211	if (*dir % 2 == 0)
	212	dist = dtab[*p - '0'];
	213	else
	214	dist = *p - '0';
	215	row -= dr[dir] * dist;
	216	col -= dc[dir] * dist;
	217	break;
	218	}
	219	}
	220	if (!windspeed)
	221	*drift = 1;
	222	if (!moved) {
	223	if (++*drift > 2) {
	224	if (ship->specs->class >= 3 && !snagged(ship)
	225	\|\| (turn & 1) == 0) {
	226	*row -= dr[winddir];
	227	*col -= dc[winddir];
	228	}
	229	}
	230	} else
	231	*drift = 0;
	232	}
	233
	234	try(command, temp, ma, ta, af, vma, dir, f, t, high, rakeme)
	235	register struct ship f, t;
	236	int ma, ta, af, *high, rakeme;
	237	char command[], temp[];
	238	{
	239	register int new, n;
	240	char st[4];
	241	#define rakeyou (gunsbear(f, t) && !gunsbear(t, f))
	242
	243	if ((n = strend(temp)) < '1' \|\| n > '9')
	244	for (n = 1; vma - n >= 0; n++) {
	245	(void) sprintf(st, "%d", n);
	246	(void) strcat(temp, st);
	247	new = score(temp, f, t, rakeme);
	248	if (new > *high && (!rakeme \|\| rakeyou)) {
	249	*high = new;
	250	(void) strcpy(command, temp);
	251	}
	252	try(command, temp, ma-n, ta, af, vma-n,
	253	dir, f, t, high, rakeme);
	254	rmend(temp);
	255	}
	256	if (ma > 0 && ta > 0 && (n = strend(temp)) != 'l' && n != 'r' \|\| !strlen(temp)) {
	257	(void) strcat(temp, "r");
	258	new = score(temp, f, t, rakeme);
	259	if (new > *high && (!rakeme \|\| gunsbear(f, t) && !gunsbear(t, f))) {
	260	*high = new;
	261	(void) strcpy(command, temp);
	262	}
	263	try(command, temp, ma-1, ta-1, af, min(ma-1, maxmove(f, (dir == 8 ? 1 : dir+1), 0)), (dir == 8 ? 1 : dir+1),f,t,high,rakeme);
	264	rmend(temp);
	265	}
	266	if ((ma > 0 && ta > 0 && (n = strend(temp)) != 'l' && n != 'r') \|\| !strlen(temp)){
	267	(void) strcat(temp, "l");
	268	new = score(temp, f, t, rakeme);
	269	if (new > *high && (!rakeme \|\| (gunsbear(f, t) && !gunsbear(t, f)))){
	270	*high = new;
	271	(void) strcpy(command, temp);
	272	}
	273	try(command, temp, ma-1, ta-1, af, (min(ma-1,maxmove(f, (dir-1 ? dir-1 : 8), 0))), (dir-1 ? dir -1 : 8), f, t, high, rakeme);
	274	rmend(temp);
	275	}
	276	}
	277
	278	rmend(str)
	279	char *str;
	280	{
	281	register char *p;
	282
	283	for (p = str; *p; p++)
	284	;
	285	if (p != str)
	286	*--p = 0;
	287	}