| Commit message (Collapse) | Author | Age |
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This refactors all instances of bitwise-ANDs with `~MOD_MASK'. There is
a handful of more complex instances I left unchanged (in cube.c, midend.c,
and twiddle.c), since those AND with `~MOD_MASK | MOD_NUM_KEYPAD' or
similar. I don't think it's worth writing a macro for those cases.
Also document this new macro's usage in devel.but.
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This adds an extra parameter to move_cursor() that's an optional pointer
to a bool indicating whether the cursor is visible. This allows for
centralising the common idiom of having the keyboard cursor become
visible when a cursor key is pressed. Consistently with the vast
majority of existing puzzles, the cursor moves even if it was invisible
before, and becomes visible even if it can't move.
The function now also returns one of the special constants that can be
returned by interpret_move(), so that the caller can correctly return
MOVE_UI_UPDATE or MOVE_NO_EFFECT without needing to carefully check for
changes itself.
Callers are updated only to the extent that they all pass NULL as the
new argument. Most of them could now be substantially simplified.
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These are similar to the existing pair configure() and custom_params()
in that get_prefs() returns an array of config_item describing a set
of dialog-box controls to present to the user, and set_prefs()
receives the same array with answers filled in and implements the
answers. But where configure() and custom_params() operate on a
game_params structure, the new pair operate on a game_ui, and are
intended to permit GUI configuration of all the settings I just moved
into that structure.
However, nothing actually _calls_ these routines yet. All I've done in
this commit is to add them to 'struct game' and implement them for the
functions that need them.
Also, config_item has new fields, permitting each config option to
define a machine-readable identifying keyword as well as the
user-facing description. For options of type C_CHOICES, each choice
also has a keyword. These keyword fields are only defined at all by
the new get_prefs() function - they're left uninitialised in existing
uses of the dialog system. The idea is to use them when writing out
the user's preferences into a configuration file on disk, although I
haven't actually done any of that work in this commit.
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Environment variables that set specific settings of particular
puzzles, such as SLANT_SWAP_BUTTONS, LIGHTUP_LIT_BLOBS and
LOOPY_AUTOFOLLOW, now all affect the game behaviour via fields in
game_ui instead of being looked up by getenv in the individual
functions that need to know them.
The purpose of this refactoring is to put those config fields in a
place where other more user-friendly configuration systems will also
be able to access them, once I introduce one. However, for the moment,
there's no functional change: I haven't _yet_ changed how the user
sets those options. They're still set by environment variables alone.
All I'm changing here is where the settings are stored inside the
code, and exactly when they're read out of the environment to put into
the game_ui.
Specifically, the getenvs now happen during new_ui(). Or rather, in
all the puzzles I've changed here, they happen in a subroutine
legacy_prefs_override() called from within new_ui(), after it's set up
the default values for the settings, and then gives the environment a
chance to override them. Or rather, legacy_prefs_override() only
actually calls getenv the first time, and after that, it's cached the
answers it got.
In order to make the override functions less wordy, I've altered the
prototype of getenv_bool so that it returns an int rather than a bool,
and takes its default return value in the same form. That way you can
set the default to something other than 0 or 1, and find out whether a
value was present at all.
This commit only touches environment configuration specific to an
individual puzzle. The midend also has some standard environment-based
config options that apply to all puzzles, such as colour scheme and
default presets and preset-menu extension. I haven't handled those
yet.
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I'm about to move some of the bodgy getenv-based options so that they
become fields in game_ui. So these functions, which could previously
access those options directly via getenv, will now need to be given a
game_ui where they can look them up.
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The majority of back-ends define encode_ui() to return NULL and
decode_ui() to do nothing. This commit allows them to instead specify
the relevant function pointers as NULL, in which case the mid-end won't
try to call them.
I'm planning to add a parameter to decode_ui(), and if I'm going to have
to touch every back-end's version of decode_ui(), I may as well ensure
that most of them never need to be touched again. And obviously
encode_ui() should go the same way for symmetry.
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This fixes a build failure introduced by commit 2e48ce132e011e8
yesterday.
When I saw that commit I expected the most likely problem would be in
the NestedVM build, which is currently the thing with the most most
out-of-date C implementation. And indeed the NestedVM toolchain
doesn't have <tgmath.h> - but much more surprisingly, our _Windows_
builds failed too, with a compile error inside <tgmath.h> itself!
I haven't looked closely into the problem yet. Our Windows builds are
done with clang, which comes with its own <tgmath.h> superseding the
standard Windows one. So you'd _hope_ that clang could make sense of
its own header! But perhaps the problem is that this is an unusual
compile mode and hasn't been tested.
My fix is to simply add a cmake check for <tgmath.h> - which doesn't
just check the file's existence, it actually tries compiling a file
that #includes it, so it will detect 'file exists but is mysteriously
broken' just as easily as 'not there at all'. So this makes the builds
start working again, precisely on Ben's theory of opportunistically
using <tgmath.h> where possible and falling back to <math.h>
otherwise.
It looks ugly, though! I'm half tempted to make a new header file
whose job is to include a standard set of system headers, just so that
that nasty #ifdef doesn't have to sit at the top of almost all the
source files. But for the moment this at least gets the build working
again.
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C89 provided only double-precision mathematical functions (sin() etc),
and so despite using single-precision elsewhere, those are what Puzzles
has traditionally used. C99 introduced single-precision equivalents
(sinf() etc), and I hope it's been long enough that we can safely use
them. Maybe they'll even be faster.
Rather than directly use the single-precision functions, though, we use
the magic macros from <tgmath.h> that automatically choose the precision
of mathematical functions based on their arguments. This has the
advantage that we only need to change which header we include, and thus
that we can switch back again if some platform has trouble with the new
header.
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This provides a standard way to get a boolean from an environment
variable. It treats the variable as true iff its value begins with 'y'
or 'Y', like most of the current implementations. The function takes a
default value which it returns if the environment variable is undefined.
This replaces the various ad-hoc tests of environment variable scattered
around and mostly doesn't change their behaviour. The exceptions are
TOWERS_2D in Towers and DEBUG_PUZZLES in the Windows front end. Both of
those were treated as true if they were defined at all, but now follow
the same rules as other boolean environment variables.
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If can_configure is false, then the game's configure() and
custom_params() functions will never be called. If can_solve is false,
solve() will never be called. If can_format_as_text_ever is false,
can_format_as_text_now() and text_format() will never be called. If
can_print is false, print_size() and print() will never be called. If
is_timed is false, timing_state() will never be called.
In each case, almost all puzzles provided a function nonetheless. I
think this is because in Puzzles' early history there was no "game"
structure, so the functions had to be present for linking to work. But
now that everything indirects through the "game" structure, unused
functions can be left unimplemented and the corresponding pointers set
to NULL.
So now where the flags mentioned above are false, the corresponding
functions are omitted and the function pointers in the "game" structures
are NULL.
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At least prevent integer overflow when constructing the grid.
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(cherry picked from Android port, commit
cb38abdc71780bd9b393b90514396c338306fa69)
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This provides a way for the front end to ask how a particular key should
be labelled right now (specifically, for a given game_state and
game_ui). This is useful on feature phones where it's conventional to
put a small caption above each soft key indicating what it currently
does.
The function currently provides labels only for CURSOR_SELECT and
CURSOR_SELECT2. This is because these are the only keys that need
labelling on KaiOS.
The concept of labelling keys also turns up in the request_keys() call,
but there are quite a few differences. The labels returned by
current_key_label() are dynamic and likely to vary with each move, while
the labels provided by request_keys() are constant for a given
game_params. Also, the keys returned by request_keys() don't generally
include CURSOR_SELECT and CURSOR_SELECT2, because those aren't necessary
on platforms with pointing devices. It might be possible to provide a
unified API covering both of this, but I think it would be quite
difficult to work with.
Where a key is to be unlabelled, current_key_label() is expected to
return an empty string. This leaves open the possibility of NULL
indicating a fallback to button2label or the label specified by
request_keys() in the future.
It's tempting to try to implement current_key_label() by calling
interpret_move() and parsing its output. This doesn't work for two
reasons. One is that interpret_move() is entitled to modify the
game_ui, and there isn't really a practical way to back those changes
out. The other is that the information returned by interpret_move()
isn't sufficient to generate a label. For instance, in many puzzles it
generates moves that toggle the state of a square, but we want the label
to reflect which state the square will be toggled to. The result is
that I've generally ended up pulling bits of code from interpret_move()
and execute_move() together to implement current_key_label().
Alongside the back-end function, there's a midend_current_key_label()
that's a thin wrapper around the back-end function. It just adds an
assertion about which key's being requested and a default null
implementation so that back-ends can avoid defining the function if it
will do nothing useful.
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I don't know how I've never thought of this before! Pretty much every
game in this collection has to have a mechanism for noticing when
game_redraw is called for the first time on a new drawstate, and if
so, start by covering the whole window with a filled rectangle of the
background colour. This is a pain for implementers, and also awkward
because the drawstate often has to _work out_ its own pixel size (or
else remember it from when its size method was called).
The backends all do that so that the frontends don't have to guarantee
anything about the initial window contents. But that's a silly
tradeoff to begin with (there are way more backends than frontends, so
this _adds_ work rather than saving it), and also, in this code base
there's a standard way to handle things you don't want to have to do
in every backend _or_ every frontend: do them just once in the midend!
So now that rectangle-drawing operation happens in midend_redraw, and
I've been able to remove it from almost every puzzle. (A couple of
puzzles have other approaches: Slant didn't have a rectangle-draw
because it handles even the game borders using its per-tile redraw
function, and Untangle clears the whole window on every redraw
_anyway_ because it would just be too confusing not to.)
In some cases I've also been able to remove the 'started' flag from
the drawstate. But in many cases that has to stay because it also
triggers drawing of static display furniture other than the
background.
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The Rockbox frontend allows games to be displayed in a "zoomed-in"
state targets with small displays. Currently we use a modal interface
-- a "viewing" mode in which the cursor keys are used to pan around
the rendered bitmap; and an "interaction" mode that actually sends
keys to the game.
This commit adds a midend_get_cursor_location() function to allow the
frontend to retrieve the backend's cursor location or other "region of
interest" -- such as the player location in Cube or Inertia.
With this information, the Rockbox frontend can now intelligently
follow the cursor around in the zoomed-in state, eliminating the need
for a modal interface.
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This is the main bulk of this boolification work, but although it's
making the largest actual change, it should also be the least
disruptive to anyone interacting with this code base downstream of me,
because it doesn't modify any interface between modules: all the
inter-module APIs were updated one by one in the previous commits.
This just cleans up the code within each individual source file to use
bool in place of int where I think that makes things clearer.
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This commit removes the old #defines of TRUE and FALSE from puzzles.h,
and does a mechanical search-and-replace throughout the code to
replace them with the C99 standard lowercase spellings.
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encode_params, validate_params and new_desc now take a bool parameter;
fetch_preset, can_format_as_text_now and timing_state all return bool;
and the data fields is_timed, wants_statusbar and can_* are all bool.
All of those were previously typed as int, but semantically boolean.
This commit changes the API declarations in puzzles.h, updates all the
games to match (including the unfinisheds), and updates the developer
docs as well.
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This function gives the front end a way to find out what keys the back
end requires; and as such it is mostly useful for ports without a
keyboard. It is based on changes originally found in Chris Boyle's
Android port, though some modifications were needed to make it more
flexible.
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I've also added that warning option and -Werror to the build script,
so that I'll find out if I break this property in future.
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They're never dynamically allocated, and are almost always string
literals, so const is more appropriate.
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This allows me to use different types for the mutable, dynamically
allocated string value in a C_STRING control and the fixed constant
list of option names in a C_CHOICES.
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To do this, I've completely replaced the API between mid-end and front
end, so any downstream front end maintainers will have to do some
rewriting of their own (sorry). I've done the necessary work in all
five of the front ends I keep in-tree here - Windows, GTK, OS X,
Javascript/Emscripten, and Java/NestedVM - and I've done it in various
different styles (as each front end found most convenient), so that
should provide a variety of sample code to show downstreams how, if
they should need it.
I've left in the old puzzle back-end API function to return a flat
list of presets, so for the moment, all the puzzle backends are
unchanged apart from an extra null pointer appearing in their
top-level game structure. In a future commit I'll actually use the new
feature in a puzzle; perhaps in the further future it might make sense
to migrate all the puzzles to the new API and stop providing back ends
with two alternative ways of doing things, but this seemed like enough
upheaval for one day.
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Recall that the hint feature is really an incremental solver. Apply
it repeatedly until the board is solved. Grade puzzles as solvable
or unsolvable by checking their parity.
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This is really an incremental solver. It alternates between solving
rows and solving columns. Each row and column is solved one piece at
a time. Except for some temporary trickery with the last two pieces
in a row or column, once a piece is solved it is never moved again.
(On non-square grids it first solves some rows or some columns until
the unsolved part is a square, then starts alternating.)
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The introduction of flip_cursor allows us to replace some hairy
hand-rolled logic with the standardised and tested move_cursor.
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puzzle backend function which ought to have it, and propagate those
consts through to per-puzzle subroutines as needed.
I've recently had to do that to a few specific parameters which were
being misused by particular puzzles (r9657, r9830), which suggests
that it's probably a good idea to do the whole lot pre-emptively
before the next such problem shows up.
[originally from svn r9832]
[r9657 == 3b250baa02a7332510685948bf17576c397b8ceb]
[r9830 == 0b93de904a98f119b1a95d3a53029f1ed4bfb9b3]
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new_desc. Oddities in the 'make test' output brought to my attention
that a few puzzles have been modifying their input game_params for
various reasons; they shouldn't do that, because that's the
game_params held permanently by the midend and it will affect
subsequent game generations if they modify it. So now those arguments
are const, and all the games which previously modified their
game_params now take a copy and modify that instead.
[originally from svn r9830]
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basically just so that it can divide mouse coordinates by the tile
size, but is definitely not expected to _write_ to it, and it hadn't
previously occurred to me that anyone might try. Therefore,
interpret_move() now gets a pointer to a _const_ game_drawstate
instead of a writable one.
All existing puzzles cope fine with this API change (as long as the
new const qualifier is also added to a couple of subfunctions to which
interpret_move delegates work), except for the just-committed Undead,
which somehow had ds->ascii and ui->ascii the wrong way round but is
otherwise unproblematic.
[originally from svn r9657]
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midend_status(), and given it three return codes for win, (permanent)
loss and game-still-in-play. Depending on what the front end wants to
use it for, it may find any or all of these three states worth
distinguishing from each other.
(I suppose a further enhancement might be to add _non_-permanent loss
as a fourth distinct status, to describe situations in which you can't
play further without pressing Undo but doing so is not completely
pointless. That might reasonably include dead-end situations in Same
Game and Pegs, and blown-self-up situations in Mines and Inertia.
However, I haven't done this at present.)
[originally from svn r9179]
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state is in a solved position, and a midend function wrapping it.
(Or, at least, a situation in which further play is pointless. The
point is, given that game state, would it be a good idea for a front
end that does that sort of thing to proactively provide the option to
start a fresh game?)
[originally from svn r9140]
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_conditionally_ able to format the current puzzle as text to be sent
to the clipboard. For instance, if a game were to support playing on
a square grid and on other kinds of grid such as hexagonal, then it
might reasonably feel that only the former could be sensibly
rendered in ASCII art; so it can now arrange for the "Copy" menu
item to be greyed out depending on the game_params.
To do this I've introduced a new backend function
(can_format_as_text_now()), and renamed the existing static backend
field "can_format_as_text" to "can_format_as_text_ever". The latter
will cause compile errors for anyone maintaining a third-party front
end; if any such person is reading this, I apologise to them for the
inconvenience, but I did do it deliberately so that they'd know to
update their front end.
As yet, no checked-in game actually uses this feature; all current
games can still either copy always or copy never.
[originally from svn r8161]
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Type menu, it looks faintly silly that Fifteen doesn't have any
presets other than Custom: you open a Fifteen window in its default
state, and the Type menu appears to be telling you it has a custom
size! Fixed by adding a preset for the default parameters.
I'd quite like to fix this properly by revamping the presets
mechanism in a way that _enforces_ that there must always be a
preset which matches the default parameters, but that's more fiddly
than it sounds. For the moment, this change fixes the only
externally visible infelicity in the current game set.
[originally from svn r7983]
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fallback behaviour as PuTTY's support.
[originally from svn r7009]
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which didn't actually need it. It was originally introduced in
Fifteen to suppress animation on Solve moves, but midend.c now does
that centrally unless the game specifically instructs it otherwise.
Therefore, just_used_solve is obsolete in all games which previously
used it. (Mines was even worse: it scrupulously maintained the
correctness of the field but never used it!)
Untangle is exempt from this cleanup: its `just_solved' field is
used to change the _length_ of the animation on Solve moves, not to
suppress it entirely, and so it has to stay.
[originally from svn r6419]
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function, since it took no parameters by which to vary its decision,
and in any case it's hard to imagine a game which only
_conditionally_ wants a status bar. Changed it into a boolean data
field in the backend structure.
[originally from svn r6417]
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was actually using it, and also it wasn't being called again for
different game states or different game parameters, so it would have
been a mistake to depend on anything in that game state. Games are
now expected to commit in advance to a single fixed list of all the
colours they will ever need, which was the case in practice already
and simplifies any later port to a colour-poor platform. Also this
change has removed a lot of unnecessary faff from midend_colours().
[originally from svn r6416]
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more general-purpose flags word for some time now. Rename it to
`flags'.
[originally from svn r6414]
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as seen by the back ends from the one implemented by the front end,
and shoved a piece of middleware (drawing.c) in between to permit
interchange of multiple kinds of the latter. I've also added a
number of functions to the drawing API to permit printing as well as
on-screen drawing, and retired print.py in favour of integrated
printing done by means of that API.
The immediate visible change is that print.py is dead, and each
puzzle now does its own printing: where you would previously have
typed `print.py solo 2x3', you now type `solo --print 2x3' and it
should work in much the same way.
Advantages of the new mechanism available right now:
- Map is now printable, because the new print function can make use
of the output from the existing game ID decoder rather than me
having to replicate all those fiddly algorithms in Python.
- the new print functions can cope with non-initial game states,
which means each puzzle supporting --print also supports
--with-solutions.
- there's also a --scale option permitting users to adjust the size
of the printed puzzles.
Advantages which will be available at some point:
- the new API should permit me to implement native printing
mechanisms on Windows and OS X.
[originally from svn r6190]
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by a grep I just did. Oops.
[originally from svn r6113]
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whether the timer is currently going is no longer solely dependent
on the current game_state: it can be dependent on more persistent
information stored in the game_ui. In particular, Mines now freezes
the timer permanently once you complete a grid for the first time,
so that you can then backtrack through your solution process without
destroying the information about how long it took you the first time
through.
[originally from svn r6088]
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common to Fifteen, Sixteen, Twiddle and Pegs is now a utility
function in misc.c.
[originally from svn r6076]
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encode_params(). This is necessary for cases where generation-time parameters
that are normally omitted from descriptive IDs can place restrictions on other
parameters; in particular, when the default value of a relevant generation-time
parameter is not the one used to generate the descriptive ID, validation could
reject self-generated IDs (e.g., Net `5x2w:56182ae7c2', and some cases in
`Pegs').
[originally from svn r6068]
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unpleasant and requiring lots of special cases to be taken care of
by every single game. The new interface exposes an integer `tile
size' or `scale' parameter to the midend and provides two much
simpler routines: one which computes the pixel window size given a
game_params and a tile size, and one which is given a tile size and
must set up a drawstate appropriately. All the rest of the
complexity is handled in the midend, mostly by binary search, so
grubby special cases only have to be dealt with once.
[originally from svn r6059]
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constraint: because some front ends interpret `draw filled shape' to
mean `including its boundary' while others interpret it to mean `not
including its boundary' (and X seems to vacillate between the two
opinions as it moves around the shape!), you MUST NOT draw a filled
shape only. You can fill in one colour and outline in another, you
can fill or outline in the same colour, or you can just outline, but
just filling is a no-no.
This leads to a _lot_ of double calls to these functions, so I've
changed the interface. draw_circle() and draw_polygon() now each
take two colour arguments, a fill colour (which can be -1 for none)
and an outline colour (which must be valid). This should simplify
code in the game back ends, while also reducing the possibility for
coding error.
[originally from svn r6047]
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- most game_size() functions now work in doubles internally and
round to nearest, meaning that they have less tendency to try to
alter a size they returned happily from a previous call
- couple of fiddly fixes (memory leaks, precautionary casts in
printf argument lists)
- midend_deserialise() now constructs an appropriate drawstate,
which I can't think how I overlooked myself since I _thought_ I
went through the entire midend structure field by field!
[originally from svn r6041]
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[originally from svn r6031]
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retired, and replaced with a simple string. Most of the games which
use it simply encode the string in the same way that the Solve move
will also be encoded, i.e. solve_game() simply returns
dupstr(aux_info). Again, this is a better approach than writing
separate game_aux_info serialise/deserialise functions because doing
it this way is self-testing (the strings are created and parsed
during the course of any Solve operation at all).
[originally from svn r6029]
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and restore anything vitally important in the game_ui. Most of the
game_ui is expected to be stuff about cursor positions and currently
active mouse drags, so it absolutely _doesn't_ want to be preserved
over a serialisation; but one or two things would be disorienting or
outright wrong to reset, such as the Net origin position and the
Mines death counter.
[originally from svn r6026]
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