The consolidation of global variables from scattered source
files into decl.c and declared in decl.h was begun in 3.7.0.
Their placement in common files was done for centralized
initialization and potential re-initialization during a
"play again" scenario.
It wasn't really necessary for all of them to be housed in a
single huge structure to meet the "play again" requirement,
and the single huge structure has been a little unwieldy when
it comes to maintenance.
Following this commit, instead of one single extremely large structure
named 'g' to house all of the relocated global variables, they
are distributed into several ga through gz.
To make things easy for the developer, each variable is placed
into the struct corresponding to the starting letter of the variable.
That way, no lookup is required in order to know which struct houses
a particular variable, it is a simple match to the starting letter
for all the centralized global variables.
A global variable named 'amulets', would be found in ga.
ga.amulets
^ ^
A global varable named 'move', would be found in gm.
gm.moves
^ ^
A global variable named 'val_for_n_or_more' would be found in gv.
gv.val_for_n_or_more
^ ^
A global variable named 'youmonst' would be found in gy.
gy.youmonst
^ ^
The air bubbles on the Plane of Water and the clouds on the Plane of
Air were being saved and restored as part of the current level's state
(which is the 'u' struct and invent and such) rather than with the
current level itself. That was ok for normal play, but for wizard
mode's ^V allowing you to return to a previously visited endgame level
after moving to a different one it meant a new set of bubbles for
Water and new set of clouds for Air. Even that was ok since it only
applied to wizard mode, but using #wizmakemap to recreate Water or Air
while you were on it added a new set of bubbles or clouds to the
existing ones. If repeated, eventually there wouldn't be much water
or air left.
Instead of just adding a hack to #wizmakemap, change save/restore to
keep the bubbles/clouds with the level rather than with the state.
That wasn't trivial and now I know why the old odd arrangement was
chosen. Saving hides u.uz by zeroing it out for levels that the hero
isn't on and it is zero during restore so simple checks for whether a
given level is water or air won't work.
This also adds another non-file/non-debugpline() use of DEBUGFILES:
DEBUGFILES=seethru nethack -D
will make water and clouds be transparent instead of opaque. It also
makes fumaroles and other light-blocking gas clouds be transparent
which wasn't really intended, but avoiding it would be extra work that
doesn't accomplish much.
Increments EDITLEVEL for the third time this week....
This is a well-defined operation, so bwrite() should be able to
handle it. However, when running under glibc, fwrite() produces an
unexpected return value for 0-byte writes, which makes bwrite()
think that the write failed (causing a panic).
This change implements 0-byte writes by not calling into libc at
all, so that we don't have to worry about how to decode the return
value of fwrite().
When shortening/splitting wide lines I noticed that the save and
restore code for regions had a bunch of those and they could be
shortened by using an intermediate variable. Easier to read too.
Also, change several 'unsigned int' to just 'unsigned' as is used in
most of the rest of the code.
At one point I omitted a (genericptr_t) cast (which should no longer
be necessary...) and discovered that bwrite() wasn't declaring the
input buffer it never modifies as 'const'.
Move the core's global restoring flag (not the same as main()'s
local resuming flag) to a more logical place. Add a saving flag
in the process, but it isn't being set or cleared anywhere yet.
(Once in use it will probably fix the exception during save that
was just reported, but before that it would be useful to figure
out what specifically caused the event.)
The program_state struct really ought to be standalone rather
than part of struct g but I haven't made that change.
Removing an unused variable for wishing and some reformatting
that whent along with it got mixed in. Removes some trailing
whitespace in sfstruct.c too.
Only lightly tested...
A check into github issue 364 confirmed that
ba6edbe5dc
had incorrectly updated the bwrite sizeof entry for sysflags.
The SYSFLAGS and MFLOPPY code is all in the outdated part of the tree, so just
remove it rather than re-correct it.
Closes#364Closes#207
