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navigate march: Fix "same mob type" and "not on sale" checks

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Unlike the other "may move" conditions, "same mobility type
(MOB_MARCH, MOB_RAIL) as leader" and "not on sale" are only checked
when collecting ships and land units.

The former breaks when a deity unwisely edits a land unit's type while
it is being marched.  Messed up when the check was added in commit
36e41e5 (v4.3.7).  However, editing has become possible only recently,
in commit 6b0b6f1.

The latter would break if a ship could be put on the market while it
is being navigated, but that's not possible, because only the owner
can navigate (see also commit 8c502d4), and only the owner can sell.
Same for land units.  Messed up in 4.0.9.  Clean it up anyway.  Bonus:
nicer error message, even spelled correctly.

Signed-off-by: Markus Armbruster <armbru@pond.sub.org>
This commit is contained in:
Markus Armbruster 2015-01-05 13:10:14 +01:00
parent 797abf4c8f
commit 520cfea05d
3 changed files with 36 additions and 38 deletions
Download patch file Download diff file Expand all files Collapse all files

53
src/lib/subs/lndsub.c
View file

@ -404,12 +404,19 @@ int
lnd_may_mar(struct lndstr *lp, struct lndstr *ldr, char *suffix)
{
struct sctstr sect;
int mobtype;
if (!lp->lnd_own || !getsect(lp->lnd_x, lp->lnd_y, &sect)) {
CANT_REACH();
return 0;
}
if (opt_MARKET && ontradingblock(EF_LAND, lp)) {
mpr(lp->lnd_own, "%s is on the trading block%s\n",
prland(lp), suffix);
return 0;
}
if (lp->lnd_ship >= 0) {
mpr(lp->lnd_own, "%s is on a ship%s\n", prland(lp), suffix);
return 0;
@ -455,6 +462,25 @@ lnd_may_mar(struct lndstr *lp, struct lndstr *ldr, char *suffix)
prland(lp), suffix);
return 0;
}
/*
* The marching code gets confused when trains and non-trains
* march together. Disallow for now.
*/
mobtype = lnd_mobtype(lp);
if (!ldr || mobtype == lnd_mobtype(ldr))
;
else if (mobtype == MOB_RAIL) {
mpr(lp->lnd_own,
"%s is a train and can't march with the leader%s\n",
prland(lp), suffix);
return 0;
} else {
mpr(lp->lnd_own, "%s can't rail-march with the leading train%s\n",
prland(lp), suffix);
return 0;
}
return 1;
}
@ -463,8 +489,6 @@ lnd_sel(struct nstr_item *ni, struct emp_qelem *list)
{
struct lndstr land, *ldr = NULL;
struct ulist *llp;
int this_mot;
int mobtype = MOB_MOVE; /* indeterminate */
emp_initque(list);
while (nxtitem(ni, &land)) {
@ -475,33 +499,8 @@ lnd_sel(struct nstr_item *ni, struct emp_qelem *list)
*/
if (!land.lnd_own || land.lnd_own != player->cnum)
continue;
if (opt_MARKET) {
if (ontradingblock(EF_LAND, &land)) {
pr("unit #%d inelligible - it's for sale.\n",
land.lnd_uid);
continue;
}
}
if (!lnd_may_mar(&land, ldr, ""))
continue;
/*
* The marching code gets confused when trains and non-trains
* march together. Disallow for now.
*/
this_mot = lnd_mobtype(&land);
if (this_mot != mobtype) {
if (mobtype == MOB_MOVE)
mobtype = this_mot;
else if (mobtype == MOB_MARCH) {
pr("%s is a train and can't march with the leader.\n",
prland(&land));
continue;
} else {
pr("%s can't rail-march with the leading train.\n",
prland(&land));
continue;
}
}
land.lnd_mission = 0;
land.lnd_rflags = 0;