pln_zap_transient_flags() fixes up planes stuck in the air (commit
7ca4f412, v4.3.12). Since commit 4e9e58bf (v4.3.14), it writes back
the fixed planes. This is wrong for empdump.
empdump should touch data only on successful import. When it fails
because ef_verify() fails, and any planes are found stuck in the air,
the plane file gets rewritten.
Make parameter ef_verify() take parameter may_put to let empdump
suppress the plane write-back. The plane file still get written out
on successful import, along with the other imported game state.
They set up invariants, and thus should be always active, not just in
the server. Since ef_blank() isn't used for these files outside the
server right now, this isn't a bug fix, just cleanup.
New struct empfile member nent replaces ef_open() parameter nelt.
Cleaner, because the expected size is a property of the file, not of
how it's used. Also fixes empdump to check file sizes.
Complication: with EFF_CREATE, ef_open() creates an empty file, to be
extended to the correct size. Callers passed nelt argument -1 along
with EFF_CREATE, to make ef_open() accept the empty file. Can't do
the same for empfile member nent. Instead, make ef_open() not check
the (zero) size then.
Replaces commit 5750107b, v4.3.15.
New struct empfile member base replaces ef_open_view() parameter base.
Cleaner, because the base table is a property of the view, not of how
it's used.
Use it to clean up verify_fail()'s base table access, and for extra
sanity checks in ef_open() and ef_open_view().
ef_open() handles onresize() failing incorrectly. Instead of fixing
that, drop the failure mode. It's not really used: unit_onresize()
fails only when used incorrectly. It isn't. If it ever is, ignoring
the failure is safe.
Why upgrade? I'm not a lawyer, but here's my take on the differences
to version 2:
* Software patents: better protection against abuse of patents to
prevent users from exercising the rights under the GPL. I doubt
we'll get hit with a patent suit, but it's a good move just on
general principles.
* License compatibility: compatible with more free licenses, i.e. can
"steal" more free software for use in Empire. I don't expect to steal
much, but it's nice to have the option.
* Definition of "source code": modernization of some details for today's
networked world, to make it easier to distribute the software. Not
really relevant to us now, as we normally distribute full source code.
* Tivoization: this is about putting GPL-licensed software in hardware,
then make the hardware refuse to run modified software. "Neat" trick
to effectively deny its users their rights under the GPL. Abuse was
"pioneered" by TiVo (popular digital video recorders). GPLv3 forbids
it. Unlikely to become a problem for us.
* Internationalization: more careful wording, to harden the license
outside the US. The lawyers tell us it better be done that way.
* License violations: friendlier way to deal with license violations.
This has come out of past experience enforcing the GPL.
* Additional permissions: Probably not relevant to us.
Also include myself in the list of principal authors.
ef_init_srv() neglected to set struct empfile callback oninit. This
made unit_carrier_change() crash or oops on freshly initialized
planes, land units and nukes, i.e. when build used an uid that hadn't
been used before. Oops recovery worked.
Broken in commit 64a53c90, v4.3.17.
Persistent game state encodes "who carries what" by storing the
carrier uid in the cargo. Cargo lists augment that: they store lists
of cargo for each carrier. They are not persistent.
New unit_cargo_init() to compute the cargo lists from game state.
Call it in ef_init_srv() and at the end of update_main().
New unit_onresize() to resize the cargo list data structure.
Installed as units' struct empfile callback onresize to make them
resize automatically with the unit files.
New unit_carrier_change() to update cargo lists when carriers change
in game state. Convenience wrappers pln_carrier_change(),
lnd_carrier_change() and nuk_carrier_change(). Call them from
prewrite callbacks to keep cargo lists in sync with game state.
To make that work, unused units must not point to a carrier. Add new
pln_oninit(), lnd_oninit() and nuk_oninit() take care of newly created
units. Change lnd_prewrite() and nuk_prewrite() to take dead land
units and nukes off their carrier. pln_prewrite() did that already.
New unit_cargo_first(), unit_cargo_next() to traverse cargo lists.
Convenience wrappers lnd_first_on_ship(), lnd_first_on_land(),
lnd_next_on_unit(), pln_first_on_ship(), pln_first_on_land(),
pln_next_on_unit() and nuk_on_plane(). The latter is disabled for now
because it clashes with an existing function.
Really belongs there, because it manipulates empfile[].
New ef_open_view() to replace ef_init_view(). Make ef_close() cope
with views, and remove ef_fina_view(). Make ef_extend() and
ef_truncate() oops on views.
Certain tables have a fixed size depending on configuration: EF_SECTOR
has WORLD_SZ() elements, EF_NATION, EF_MAP and EF_BMAP have MAXNOC
elements, and EF_REALM has MAXNOC * MAXNOR elements. Bad things
happen if the files backing them are shorter.
Pass expected size to ef_open(), and make it fail when the actual size
differs.
Split ef_init() into two functions: empfile_init() for initialization,
and empfile_fixup() to fix it up for configuration. Put them next to
empfile[]. Move the call to empfile_init() from behind emp_config()
to before it.
(gamestr, EF_GAME, game_ca): New.
(empfile): Declare the table.
(ef_open_srv, ef_close_srv): Open and close it.
(main): Create it.
(empobj_storage): New member game.
(EF_DYNMAX): New.
(EF_IS_GAME_STATE): Use it.
empth_init(), because writing calls empth_self(). Move call of
journal_startup().
(ef_close_srv, finish_server, panic): Move call of journal_shutdown()
for symmetry.
(keep_journal): New econfig key.
(player_main): Log player login and logout.
(recvclient): Log player input.
(ef_open_srv, ef_close_srv): Log startup and shutdown.
(update_main): Log update.
Support the common SIGHUP log rotation idiom:
(empth_wait_for_shutdown, empth_wait_for_signal): Rename.
[EMPTH_LWP, EMPTH_POSIX] (empth_init, empth_wait_for_signal): Wait for
SIGHUP as well.
(main) [SIGHUP]: Reopen journal when empth_wait_for_signal() returns
SIGHUP.
nat_ca[] was designed for visibility to the owner only, while cou_ca[]
was designed for the public. xdvisible() implemented that for xdump.
But selectors don't care for that! Since nat_ca[] applies to
EF_NATION, it must be for public visibility. Broken in 4.2.21. Fix
by exchanging contents of nat_ca[] and and cou_ca[]. This breaks
clients relying on xdump.
(ef_init_srv): Make NSC_DEITY in cou_ca mirror ~NSC_EXTRA in nat_ca,
except for cnum, which may not have either flag in either table.
(nat_ca): Make selectors stat, cname, passwd, xorg, yorg, relations,
contacts and rejects NSC_EXTRA.
(config_tables): New econfig key.
(read_config_tables): New, implements config_tables.
(main): Call it. Need to call ef_init() and chdir(configdir) first.
(ef_init_srv): Don't call ef_init(), since main() did it already.
Remove old way to do the same:
(ef_load): Remove, along with calls.
(empfile): Set configuration tables' member file back to NULL.
deities what xdump nat used to show:
(cou_ca): Remove initializer.
(ef_init_srv): Initialize cou_ca[] from nat_ca[].
(xdvisible): Change case EF_NATION to return true only for owner
even for deities.
(xundump): Set empfile member cids in addition to fids.
(xundump): Clarify shortcomings: requires EFF_MEM, appends sentinel
always, can't grow dynamic cache.
(xundump): Return table type on success.
Rename close_files() to ef_close_srv() and move to fileinit.c.
Replace calls to close_files() with ef_fin_srv().
Call ef_close_srv() from ef_fin_srv().
(ef_close_srv, ef_fin_srv): New.
(init_files, init_server, ef_init_srv):
Rename init_files() to ef_open_srv() and move to fileinit.c.
Remove call to init_files() from init_server() and replace
with a call to ef_open_srv() from ef_init_srv().
(ef_open_srv): New.
(ef_load, init_server, ef_init_srv):
Move the call to ef_load() from init_server() to ef_init_srv().
(global_init, init_server, ef_init_srv):
Move the call to global_init() from init_server() to ef_init_srv().
(nullify_objects, global_init, init_server):
Split nullify_objects() into init_lchr() and init_dchr().
Locate init_lchr() and init_dchr() in init.c.
Add calls to init_lchr() and to init_dchr() from global_init().
(init_lchr(), init_dchr()): New.
player->owner is no longer used. Use it to indicate that owner can be
accessed through struct genitem, similar to EFF_XY and EFF_GROUP.
(xdump): Fix ownership checking. Old version worked only when
nxtitem() set player->owner.
(empfile): Set EFF_OWNER for EF_LOST. This fixes `xdump lost'
disclosing other countries' losses.
(loststr): Document implications of EFF_OWNER.
(empfile): Set EFF_OWNER for EF_NATION.
(natstr): Rearrange members for EFF_OWNER, document.
(nat_ca): Unused so far. Clean it up, add most missing selectors.
(fileinit): Use it. This implements `xdump nation'.
(fileinit): Simplify setting map file size.
