Return a couple of variables that actually held a direction back
to int from coordxy.
bhit() takes int params instead of coordxy.
boomhit() takes int params instead of coordxy.
xytod() renamed to xytodir(), and takes int params (promotion will handle
coordxy params).
dtoxy(coord *, int) renamed to dirtocoord(coord *, int).
This fixes a couple of bugs: a long-standing bug in which writing a
scroll by label could fail even if you've already seen a scroll with
that label (due to the game not tracking whether or not you've seen a
scroll if it doesn't have a name); and a somewhat newer bug in which
spellbooks auto-identified by Wizard knowledge were marked as having
been encountered (rather than as known but not encountered).
Breaks save file compatibility, but not bones files.
There was only one point in the code at which this caching was
being done, and it was incorrect: it's possible for the result of
near_capacity to change during a monster turn because monster
actions can change either inventory weight or carry capacity.
The bug was particularly relevant in cases where a character
polymorphed into a slow weak monster gets attacked by a monster
that moves at normal speed: due to the polyform being slow, the
normal-speed monster gets in a lot of attacks and causes a
rehumanization, but due to the polyform being weak, it was
burdened at the start of the monster turn, and so when that
penalty is (due to the bug) applied to the next turn it can
mean that the character misses the next turn too, and may end up
dying as a result.
The existing messages made sense for brief dips into water, but
didn't make sense when using an oilskin sack for an extended
period underwater (and also assumed that the player was able to
see the sack). This commit changes the message to make sense
(and to be less spamy) if the hero enters water and remains there,
and prevents oilskin sacks self-IDing if the hero is blind and
thus can't see the water.
Disarming a chest trap was setting obj->tknown = 0 even though the
hero just discovered that it isn't trapped.
Triggering a chest trap behaved similarly. Since there are no
repeating chest traps, hero should know that the chest whose trap
just went off is no longer trapped.
chest_trap() didn't document its return value but was clearly meant
to return True if the chest was destroyed. It didn't handle that
correctly when the chest was being carried. However, none of the
callers actually use the return value. [This fix tracks whether the
chest gets deleted; a better fix would be to destroy an exploding
chest even when it is being carried.]
Initially diagnosed in an xnethack fuzzer crash - unblock_point
shouldn't be called when a closed door becomes non-closed, because it's
possible that there's a gas cloud on the space which means it still
blocks vision. These always need to be recalc_block_point. A number of
them were fixed, but when I went through all the xnethack ones, I found
some that were unchanged from upstream NetHack. I reproduced the sanity
check impossibles usually by breathing gas at a door as an iron golem
and then opening or destroying the door to trigger the unblock_point
call.
The use of recalc_block_point in wizterrainwish was not triggering this
bug, but the previous code there basically duplicated
recalc_block_point.
Picked arbitrarily; there weren't any unresolved analyzer complaints
for trap.c. I wonder why the onefile analysis isn't complaining here.
'in_sight' may have been relevant before the trapeffect_xyz() code
was split apart, but it isn't useful for trapeffect_hole() despite
the comment about it.
release_holding_trap() is fairly convoluted and the complaints being
addressed here were relevant.
After finding a trap on a chest or a large box, remember it
as trapped: "You see here a trapped large box."
Randomly generated chests and boxes can be obviously trapped.
Allow defining obviously trapped containers via lua.
Invalidates saves and bones.
Issue reported by loggersviii: attempting #untrap from an adjacent
doorway can move the hero diagonally out of the doorway.
A followup comment by elunna pointed out that a monster's attack that
results in knockback can produce similar result.
Fixes#1305
gcc has recognized various "magic comments" for white-listing
occurrences of implicit fallthrough in switch statements for
a long time:
The range and shape of "falls through" comments accepted are
contingent upon the level of the warning. (The default level is =3.)
-Wimplicit-fallthrough=0 disables the warning altogether.
-Wimplicit-fallthrough=1 treats any kind of comment as a "falls through" comment.
-Wimplicit-fallthrough=2 essentially accepts any comment that contains something
that matches (case insensitively) "falls?[ \t-]*thr(ough|u)" regular expression.
-Wimplicit-fallthrough=3 case sensitively matches a wide range of regular
expressions, listed in the GCC manual. E.g., all of these are accepted:
/* Falls through. */
/* fall-thru */
/* Else falls through. */
/* FALLTHRU */
/* ... falls through ... */
etc.
-Wimplicit-fallthrough=4 also, case sensitively matches a range of regular
expressions but is much more strict than level =3.
-Wimplicit-fallthrough=5 doesn't recognize any comments.
Plenty of other compilers did not recognize the gcc comment convention,
and up until now the compiler warning for detecting unintended
fallthrough had to be suppressed on other compilers. That's because the code
in NetHack has been relying on the gcc approach, and only the gcc approach.
The C23 standard introduces an attribute [[fallthrough]] for the
functionality, when implicit fallthrough warnings have been enabled.
Several popular compilers already support that, or a very similar attribute
style approach, today, even ahead of their C23 support:
C compiler whitelist approach
--------------------------- -------------------------------------
C23 conforming compilers [[fallthrough]]
clang versions supporting
standards prior to
C23 __attribute__((__fallthrough__))
Microsoft Visual Studio
since VS 2022 17.4.
The warning C5262 controls
whether the implict
fallthrough is detected and
warned about with
/std:clatest. [[fallthrough]]
This adds support to NetHack for the attribute approach by inserting a
macro FALLTHROUGH to the existing cases that require white-listing, so
other compilers can analyze things too.
The definition of the FALLTHROUGH macro is controlled in include/tradstdc.h.
The gcc comment approach has also been left in place at this time.
GitHub issue #1315 points out that it is possible for
a downstream function to change an object's nobj field
to point to a completely different chain.
The cited example by @vultur-cadens was:
for (obj = gi.invent; obj; obj = obj->nobj)
if (obj->oclass != COIN_CLASS && !obj->cursed && !rn2(5)) {
curse(obj);
++buc_changed;
}
curse() drops the weapon with drop_uswapwep(),
which calls dropx(),
which calls dropy(),
which calls dropz(),
which calls place_object().
place_object alters the nobj pointer, to point to the floor chain:
otmp->nobj = fobj;
fobj = otmp;
The result was that the next loop iteration was then using floor
objects from the floor chain.
This alters several for-loops to use a more consistent approach,
particularly when the obj is being handed off to a function,
where a downstream function might, or might not, alter the nobj
field.
References:
https://github.com/NetHack/NetHack/issues/1315https://www.reddit.com/r/nethack/comments/1gkc9ub/even_if_you_drop_an_item_before_drinking_from_the/
Changes to setuhpmax() a couple of days ago to deal with sanity_check
for "current hero health as monster better than maximum" ended up
triggering sanity_check about "current hero health better than maximum"
when gaining experience level(s) while polymorphed.
Issue reported by ars3niy: non-fireproof water walking boots are
supposed to be destroyed if worn on lava, but a post-3.6 change
made that only happen if the hero died and left bones.
The boots remained intact if hero was fire resistant or survived
6d6 damage. Staying intact should only happen if they're fireproof.
This seems to work but each time lava_effects() gets modified it
becomes more fragile. Having deleted objects stick around doesn't
help with this problem, which is to keep an item which is being
stolen--and whose loss causes the hero to drop into lava--from
being burned up before being transferred to the thief's inventory.
Fixes#1291
The g? structs had a mix of variables that were written to
the savefile, and those that were not.
For better clarity and to distinguish those that end up in
the savefile, relocate some g? variables that get written
directly to the savefile into different structs.
This updates EDITLEVEL, although technically it probably
didn't need to, since savefile contents are not changing.
Details:
gb.bases -> svb.bases
gb.bbubbles -> svb.bbubbles
gb.branches -> svb.branches
gc.context -> svc.context
gd.disco -> svd.disco
gd.dndest -> svd.dndest
gd.doors -> svd.doors
gd.doors_alloc -> svd.doors_alloc
gd.dungeon_topology -> svd.dungeon_topology
gd.dungeons -> svd.dungeons
ge.exclusion_zones -> sve.exclusion_zones
gh.hackpid -> svh.hackpid
gi.inv_pos -> svi.inv_pos
gk.killer -> svk.killer
gl.lastseentyp -> svl.lastseentyp
gl.level -> svl.level
gl.level_info -> svl.level_info
gm.mapseenchn -> svm.mapseenchn
gm.moves -> svm.moves
gm.mvitals -> svm.mvitals
gn.n_dgns -> svn.n_dgns
gn.n_regions -> svn.n_regions
gn.nroom -> svn.nroom
go.oracle_cnt -> svo.oracle_cnt
gp.pl_character -> svp.pl_character
gp.pl_fruit -> svp.pl_fruit
gp.plname -> svp.plname
gp.program_state -> svp.program_state
gq.quest_status -> svq.quest_status
gr.rooms -> svr.rooms
gs.sp_levchn -> svs.sp_levchn
gs.spl_book -> svs.spl_book
gt.timer_id -> svt.timer_id
gt.tune -> svt.tune
gu.updest -> svu.updest
gx.xmax -> svx.xmax
gx.xmin -> svx.xmin
gy.ymax -> svy.ymax
gy.ymin -> svy.ymin
Related note:
There are some pointer variables that are heads of chains that were not
moved from 'g?' to 'sv?', because they are not actually written to the
savefile directly, but the objects/monst/trap/lightsource/timer in the
chains they point to are. That can be changed, if desired.
Examples: gi.invent, gm.migrating_objs, gb.billobjs, gm.migrating_mons,
gf.ftrap, gl.light_base, gt.timer_base
Replace several upstart(y_monnam(mon)) with new YMonnam(mon) to
produce "Your little dog" and such.
Also change one or two Monnam(mon) to YMonnam(mon) and one pline(...)
to pline_mon(mon, ...).
Add a theme room with multiple visible teleportation traps
which will always teleport to specific locations in the same level.
Teleport trap change from xNetHack by copperwater <aosdict@gmail.com>.
Containers can't become fireproofed so the line of code in
fire_damage() which tested for that led to confusion.
Also, add missing handling for statues as containers.
Landmine blew up, scatter exploded a potion of oil, which melted
the ice on which the landmine was, resulting in the landmine trap
being deleted. The code then tried to access it to make a pit.
Issue reported by Umbire: if hero dies by drowning on the Plane
of Water, cause of death was reported as "drowning in a limitless
water".
Reported for livelogging but applied to tombstone and logfile too.
Omit the article "a" in this situation.
For 3.6.7, it would have started as "drowning in a water" and been
updated on the fly to be "drowning in deep water". 3.7 changed
terrain type WATER to be "wall of water", where "a" is expected,
and also added "limitless water" for Plane of Water, but it was
neglecting to include a similar fixup for the latter. The "deep
water" fixup is still present but doesn't get triggered anymore.
Fixes#1248
In 3.6.2 parts of the wakeup code were merged together, and this
caused pets consider any noise made by the hero - such as hitting
iron bars or digging - as whistling for them to come to the hero.
Change it to only consider actual whistling and ringing a bell.
Reported directly to devteam: if a magic trap gave its uncurse
effect, scroll of remove curse could become discovered.
Turns out that it would happen if hero was wielding a stack of
unholy water potions. It didn't matter whether they were known
as water or known to be cursed or whether hero was carrying any
scrolls of remove curse.
