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Refactor and fix takeover.c

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Factor new takeover_unit() out of takeover_ship(), takeover_plane(),
takeover_land().  This fixes the following bugs in assault, attack,
board, lboard, paradrop and pboard:

* When the "land unit loaded on land unit" relation had a cycle,
  takeover_land() went into an infinite recursion.  Such cycles exist
  only in a corrupt game state.

* Nukes armed on planes weren't taken over along with their plane.
  Broken in commit 2e40a4bb, v4.3.3.

* Taking over land units with negative mobility increased mobility to
  zero.  Ditto planes embarked on ships or land units.

* Taking over planes embarked on ships or land units didn't clear
  their wing.

* Taking over planes and land units updated their MOB_ACCESS timestamp
  (pln_access, lnd_access), except for planes not embarked on
  anything.  This had no effect.
This commit is contained in:
Markus Armbruster 2008-09-14 15:13:16 -04:00
parent 94a3108b23
commit 5f6e27ff80
1 changed files with 53 additions and 76 deletions
Download patch file Download diff file Expand all files Collapse all files

129
src/lib/subs/takeover.c
View file

@ -35,6 +35,7 @@
#include <config.h>
#include "file.h"
#include "empobj.h"
#include "game.h"
#include "land.h"
#include "lost.h"
@ -48,6 +49,8 @@
#include "ship.h"
#include "xy.h"
static void takeover_unit(struct empobj *, natid);
void
takeover(struct sctstr *sp, natid newown)
{
@ -200,96 +203,70 @@ takeover_plane(struct plnstr *pp, natid newown)
prplane(pp),
cname(newown), xyas(pp->pln_x, pp->pln_y, pp->pln_own));
}
if (opt_MARKET)
trdswitchown(EF_PLANE, pp, newown);
if (pp->pln_mobil > 0)
pp->pln_mobil = 0;
pp->pln_own = newown;
pp->pln_mission = 0;
pp->pln_wing = 0;
putplane(pp->pln_uid, pp);
takeover_unit((struct empobj *)pp, newown);
}
void
takeover_ship(struct shpstr *sp, natid newown)
{
struct plnstr *pp;
struct lndstr *lp;
struct nstr_item ni;
struct plnstr p;
struct lndstr llp;
if (opt_MARKET)
trdswitchown(EF_SHIP, sp, newown);
sp->shp_own = newown;
sp->shp_mission = 0;
sp->shp_fleet = 0;
sp->shp_rflags = 0;
memset(sp->shp_rpath, 0, sizeof(sp->shp_rpath));
pp = &p;
lp = &llp;
/* Take over planes */
snxtitem_cargo(&ni, EF_PLANE, EF_SHIP, sp->shp_uid);
while (nxtitem(&ni, pp)) {
if (pp->pln_effic > PLANE_MINEFF)
pp->pln_effic = PLANE_MINEFF;
pp->pln_mobil = 0;
if (opt_MOB_ACCESS)
game_tick_to_now(&pp->pln_access);
if (opt_MARKET)
trdswitchown(EF_PLANE, pp, newown);
pp->pln_mission = 0;
pp->pln_own = newown;
putplane(pp->pln_uid, pp);
}
/* Take over land units */
snxtitem_cargo(&ni, EF_LAND, EF_SHIP, sp->shp_uid);
while (nxtitem(&ni, lp))
takeover_land(lp, newown);
putship(sp->shp_uid, sp);
takeover_unit((struct empobj *)sp, newown);
}
void
takeover_land(struct lndstr *landp, natid newown)
{
takeover_unit((struct empobj *)landp, newown);
}
static void
takeover_unit(struct empobj *unit, natid newown)
{
struct shpstr *sp;
struct plnstr *pp;
struct lndstr *lp;
int type;
struct nstr_item ni;
struct plnstr p;
struct lndstr llp;
union empobj_storage cargo;
if (landp->lnd_effic < LAND_MINEFF) {
putland(landp->lnd_uid, landp);
return;
}
landp->lnd_army = 0;
landp->lnd_mobil = 0;
if (opt_MOB_ACCESS)
game_tick_to_now(&landp->lnd_access);
landp->lnd_harden = 0;
unit->own = newown;
if (opt_MARKET)
trdswitchown(EF_LAND, landp, newown);
landp->lnd_mission = 0;
landp->lnd_own = newown;
pp = &p;
lp = &llp;
/* Take over planes */
snxtitem_cargo(&ni, EF_PLANE, EF_LAND, landp->lnd_uid);
while (nxtitem(&ni, pp)) {
if (pp->pln_effic > PLANE_MINEFF)
pp->pln_effic = PLANE_MINEFF;
pp->pln_mobil = 0;
if (opt_MOB_ACCESS)
game_tick_to_now(&pp->pln_access);
if (opt_MARKET)
trdswitchown(EF_PLANE, pp, newown);
pp->pln_mission = 0;
pp->pln_own = newown;
putplane(pp->pln_uid, pp);
trdswitchown(unit->ef_type, unit, newown);
unit->group = 0;
unit->mission = 0;
switch (unit->ef_type) {
case EF_SHIP:
sp = (struct shpstr *)unit;
sp->shp_rflags = 0;
memset(sp->shp_rpath, 0, sizeof(sp->shp_rpath));
break;
case EF_PLANE:
pp = (struct plnstr *)unit;
if (pp->pln_mobil > 0)
pp->pln_mobil = 0;
break;
case EF_LAND:
lp = (struct lndstr *)unit;
if (lp->lnd_mobil > 0)
lp->lnd_mobil = 0;
lp->lnd_harden = 0;
break;
case EF_NUKE:
break;
default:
CANT_REACH();
}
put_empobj(unit->ef_type, unit->uid, unit);
for (type = EF_PLANE; type <= EF_NUKE; type++) {
snxtitem_cargo(&ni, type, unit->ef_type, unit->uid);
while (nxtitem(&ni, &cargo)) {
if (cargo.gen.own == newown)
continue;
if (type == EF_PLANE)
cargo.plane.pln_effic = PLANE_MINEFF;
takeover_unit(&cargo.gen, newown);
}
}
/* Take over land units */
snxtitem_cargo(&ni, EF_LAND, EF_LAND, landp->lnd_uid);
while (nxtitem(&ni, lp))
takeover_land(lp, newown);
putland(landp->lnd_uid, landp);
}