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Simplify take_move_in_mob()

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Actually, this isn't just simplification.  When mobility gain per
update was configured to be greater than 128, mobility could go from 1
to less than -127 when assaulting from a landing ship, and thus
overflow.  Make it saturate at -127.  Note that you can expect plenty
of trouble elsewhere with such a silly configuration.
This commit is contained in:
Markus Armbruster 2008-02-16 18:29:35 +01:00
parent 5c2f7646e1
commit 74dc4b9e3a
1 changed files with 17 additions and 23 deletions
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36
src/lib/subs/attsub.c
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@ -2523,43 +2523,37 @@ static void
take_move_in_mob(int combat_mode, struct ulist *llp, struct combat *off,
struct combat *def)
{
int mobcost;
int new;
double mob = llp->unit.land.lnd_mobil;
double gain = etu_per_update * land_mob_scale;
double mobcost;
switch (combat_mode) {
case A_ATTACK:
mobcost = lnd_pathcost(&llp->unit.land,
att_mobcost(off->own, def,
lnd_mobtype(&llp->unit.land)));
new = llp->unit.land.lnd_mobil - mobcost;
if (new < -127)
new = -127;
llp->unit.land.lnd_mobil = new;
break;
case A_ASSAULT:
if (off->shp_mcp->m_flags & M_LAND) {
if (((struct lchrstr *)llp->chrp)->l_flags & L_MARINE)
llp->unit.land.lnd_mobil -=
(float)etu_per_update * land_mob_scale * 0.5;
mobcost = off->shp_mcp->m_flags & M_LAND ? gain / 2.0 : mob;
else
llp->unit.land.lnd_mobil -= (float)etu_per_update *
land_mob_scale;
} else {
if (((struct lchrstr *)llp->chrp)->l_flags & L_MARINE)
llp->unit.land.lnd_mobil = 0;
else
llp->unit.land.lnd_mobil = -(float)etu_per_update *
land_mob_scale;
}
mobcost = off->shp_mcp->m_flags & M_LAND ? gain : mob + gain;
break;
case A_BOARD:
/* I arbitrarily chose the numbers 10 and 40 below -KHS */
if (((struct lchrstr *)llp->chrp)->l_flags & L_MARINE)
llp->unit.land.lnd_mobil -= 10;
mobcost = 10;
else
llp->unit.land.lnd_mobil -= 40;
mobcost = 40;
break;
default:
CANT_REACH();
mobcost = 0;
}
mob -= mobcost;
if (mob < -127.0)
mob = -127.0;
llp->unit.land.lnd_mobil = (signed char)mob;
llp->unit.land.lnd_harden = 0;
}