must be valid. Oopses on bad direction characters.
(pathtoxy, ac_encounter): Bad direction characters used to lead to bad
array subscript and potential disaster.
(pathrange, path): Stop on DIR_STOP as well as on bad direction
characters. This is just for consistency with other code; DIR_STOP
should occur only last in a path here.
(sail_nav_fleet, nav_ship): No change except for the oops.
extern double pathtoxy(s_char *, coord *, coord *,
double (*)(struct sctstr * sp, natid own));
extern int chkdir(s_char, int, int);
+extern int diridx(char);
extern void direrr(s_char *, s_char *, s_char *);
extern void pathrange(register coord, register coord, register s_char *,
int, struct range *);
natp = getnatp(player->cnum);
xyrelrange(natp, &absrange, &relrange);
blankfill((s_char *)mapbuf, &ns.range, 3);
- while (*pp && (i = chkdir(*pp, DIR_STOP, DIR_LAST)) >= 0) {
+ for (; *pp; ++pp) {
+ i = diridx(*pp);
+ if (i == DIR_STOP)
+ break;
memcpy(&map[deltay(cy, ns.range.ly)][deltax(cx, ns.range.lx) * 2],
routech[i][0],
3);
pln_removedupes(bomb_list, esc_list);
while ((dir = mypath[myp++]) && !QEMPTY(bomb_list)) {
- if ((val = chkdir(dir, DIR_STOP, DIR_LAST)) == 0)
+ if ((val = diridx(dir)) == DIR_STOP)
break;
/* XXX using xnorm is probably bad */
x = xnorm(x + diroff[val][0]);
pr(map_msg, dirch[DIR_MAP]);
}
+/*
+ * Map direction DIR to a direction index DIR_STOP..DIR_LAST.
+ * DIR must be a valid direction.
+ */
+int
+diridx(char dir)
+{
+ unsigned i = dir - 'a';
+
+ if (CANT_HAPPEN(i >= sizeof(dirindex) / sizeof(*dirindex)
+ || dirindex[i] < 0))
+ return DIR_STOP;
+ return dirindex[i];
+}
+
/*
* return pointer to path; prompt user until a stop char
* or a bomb char have been entered. A "bomb" char in
coord y;
int val;
double m;
- int c;
x = *xp;
y = *yp;
m = 0.0;
for (pp = path; *pp; pp++) {
- if ((val = chkdir(*pp, DIR_STOP, DIR_LAST)) == 0)
+ if ((val = diridx(*pp)) == DIR_STOP)
break;
x += diroff[val][0];
y += diroff[val][1];
- c = dirch[val];
- if (c == DIR_STOP)
- break;
if (!getsect(x, y, &s))
return -1.0;
m += cost(&s, s.sct_own);
}
void
-pathrange(register coord cx, register coord cy, register s_char *pp,
- int border, struct range *range)
+pathrange(coord cx, coord cy, s_char *pp, int border, struct range *range)
{
int dir;
range->hy = cy;
range->width = 0;
range->height = 0;
- while ((dir = chkdir(*pp, DIR_FIRST, DIR_LAST)) >= 0) {
- pp++;
+ for (; *pp; pp++) {
+ dir = diridx(*pp);
+ if (dir == DIR_STOP)
+ break;
cx += diroff[dir][0];
cy += diroff[dir][1];
if (cx < range->lx)
stopping = 0;
while (*cp && !stopping && sp->shp_own && mlp->mobil > 0.0) {
- dir = chkdir(*cp++, DIR_STOP, DIR_LAST);
-
+ dir = diridx(*cp++);
stopping |= shp_nav_one_sector(&ship_list, dir,
sp->shp_own, 0);
}
-/* sp->shp_mobil = (int) mobil;
- */
/* Ship not sunk */
if (sp->shp_own)
nav_check_atdest(sp);
own = sp->shp_own;
fltp_to_list(fltp, &ship_list); /* hack -KHS 1995 */
for (s = sp->shp_path; (*s) && (fltp->maxmoves > 0); s++) {
- dir = chkdir(*s, DIR_STOP, DIR_LAST);
- if (0 != (error = shp_nav_one_sector(&ship_list, dir, own, 0)))
+ dir = diridx(*s);
+ if (0 != shp_nav_one_sector(&ship_list, dir, own, 0))
fltp->maxmoves = 1;
- --(fltp->maxmoves);
+ --fltp->maxmoves;
}
shp_put(&ship_list, own);
getship(sp->shp_uid, &ship);