nethack-gwaa-kiwi/nethack
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poly'd hero movement

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Noticed while fixing the 'monster intrinsics from worn gear' bug(s):
set_uasmon() calls set_mon_data(&youmonst,...) which updates movement
when the monster polymorphs into something slower, then it did the
same thing to youmonst.movement itself, hitting the hero with a double
dose of reduction for any movement points not yet spent on current
turn.  Remove the set_uasmon() side of that, and change set_mon_data()
side to add a redundant non-zero test to prevent static analysis from
warning that it might be dividing by 0.
This commit is contained in:
PatR
2019-02-18 13:24:58 -08:00
parent a6ff7210be
commit 48ea357266
2 changed files with 13 additions and 15 deletions
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16
src/mondata.c
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@@ -1,4 +1,4 @@
/* NetHack 3.6 mondata.c $NHDT-Date: 1550524563 2019/02/18 21:16:03 $ $NHDT-Branch: NetHack-3.6.2-beta01 $:$NHDT-Revision: 1.71 $ */
/* NetHack 3.6 mondata.c $NHDT-Date: 1550525093 2019/02/18 21:24:53 $ $NHDT-Branch: NetHack-3.6.2-beta01 $:$NHDT-Revision: 1.72 $ */
/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
/*-Copyright (c) Robert Patrick Rankin, 2011. */
/* NetHack may be freely redistributed. See license for details. */
@@ -19,13 +19,21 @@ struct permonst *ptr;
mon->data = ptr;
mon->mnum = (short) monsndx(ptr);
if (mon->movement) { /* same adjustment as poly'd hero undergoes */
if (mon->movement) { /* used to adjust poly'd hero as well as monsters */
new_speed = ptr->mmove;
/* prorate unused movement if new form is slower so that
it doesn't get extra moves leftover from previous form;
if new form is faster, leave unused movement as is */
if (new_speed < old_speed)
mon->movement = new_speed * mon->movement / old_speed;
if (new_speed < old_speed) {
/*
* Some static analysis warns that this might divide by 0
mon->movement = new_speed * mon->movement / old_speed;
* so add a redundant test to suppress that.
*/
mon->movement *= new_speed;
if (old_speed > 0) /* old > new and new >= 0, so always True */
mon->movement /= old_speed;
}
}
return;
}

12
src/polyself.c
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@@ -1,4 +1,4 @@
/* NetHack 3.6 polyself.c $NHDT-Date: 1550524564 2019/02/18 21:16:04 $ $NHDT-Branch: NetHack-3.6.2-beta01 $:$NHDT-Revision: 1.127 $ */
/* NetHack 3.6 polyself.c $NHDT-Date: 1550525094 2019/02/18 21:24:54 $ $NHDT-Branch: NetHack-3.6.2-beta01 $:$NHDT-Revision: 1.128 $ */
/* Copyright (C) 1987, 1988, 1989 by Ken Arromdee */
/* NetHack may be freely redistributed. See license for details. */
@@ -41,7 +41,6 @@ void
set_uasmon()
{
struct permonst *mdat = &mons[u.umonnum];
int new_speed, old_speed = youmonst.data ? youmonst.data->mmove : 0;
set_mon_data(&youmonst, mdat);
@@ -101,15 +100,6 @@ set_uasmon()
float_vs_flight(); /* maybe toggle (BFlying & I_SPECIAL) */
polysense();
if (youmonst.movement) {
new_speed = mdat->mmove;
/* prorate unused movement if new form is slower so that
it doesn't get extra moves leftover from previous form;
if new form is faster, leave unused movement as is */
if (new_speed < old_speed)
youmonst.movement = new_speed * youmonst.movement / old_speed;
}
#ifdef STATUS_HILITES
status_initialize(REASSESS_ONLY);
#endif