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* Add method for frontends to query the backend's cursor location.Franklin Wei2020-12-07
| | | | | | | | | | | | | | | | 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.
* Use C99 bool within source modules.Simon Tatham2018-11-13
| | | | | | | | | | 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.
* Replace TRUE/FALSE with C99 true/false throughout.Simon Tatham2018-11-13
| | | | | | 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.
* Adopt C99 bool in the game backend API.Simon Tatham2018-11-13
| | | | | | | | | | | 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.
* Add a request_keys() function with a midend wrapper.Franklin Wei2018-04-22
| | | | | | | | 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.
* Make the code base clean under -Wwrite-strings.Simon Tatham2017-10-01
| | | | | 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.
* Return error messages as 'const char *', not 'char *'.Simon Tatham2017-10-01
| | | | | They're never dynamically allocated, and are almost always string literals, so const is more appropriate.
* Use a proper union in struct config_item.Simon Tatham2017-10-01
| | | | | | 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.
* New name UI_UPDATE for interpret_move's return "".Simon Tatham2017-10-01
| | | | | | | | | | | | | Now midend.c directly tests the returned pointer for equality to this value, instead of checking whether it's the empty string. A minor effect of this is that games may now return a dynamically allocated empty string from interpret_move() and treat it as just another legal move description. But I don't expect anyone to be perverse enough to actually do that! The main purpose is that it avoids returning a string literal from a function whose return type is a pointer to _non-const_ char, i.e. we are now one step closer to being able to make this code base clean under -Wwrite-strings.
* Rework the preset menu system to permit submenus.Simon Tatham2017-04-26
| | | | | | | | | | | | | | | | | | | | 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.
* Improve connectedness-error highlighting in Singles.Simon Tatham2014-09-21
| | | | | | | | Using exactly the same policy as I did for Range the other day: if multiple regions exist, then one is taken to be canonical and all the others are marked as errors. [originally from svn r10233]
* Giant const patch of doom: add a 'const' to every parameter in everySimon Tatham2013-04-13
| | | | | | | | | | | | | | 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]
* Add 'const' to the game_params arguments in validate_desc andSimon Tatham2013-04-12
| | | | | | | | | | | | 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]
* New rule: interpret_move() is passed a pointer to the game_drawstateSimon Tatham2012-09-09
| | | | | | | | | | | | | | | | 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]
* For the convenience of Linux package maintainers, add to Makefile.gtkSimon Tatham2012-08-17
| | | | | | | | | | | | | and Makefile.doc a command-line parameter 'BINPREFIX' which will be prepended to all the game binary names. E.g. 'make BINPREFIX=sgt-' and 'make BINPREFIX=sgt- install', and correspondingly 'make -f Makefile.doc BINPREFIX=sgt-'. Also included in this commit by mistake, changes to singles.c to add \n to the end of all its debug() statements. I meant to commit that separately. Oops. [originally from svn r9606]
* Changed my mind about midend_is_solved: I've now reprototyped it asSimon Tatham2011-06-19
| | | | | | | | | | | | | | | | 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]
* Add a function to every game backend which indicates whether a gameSimon Tatham2011-04-02
| | | | | | | | | | | 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]
* Fix incorrect uses of ctype.h (passing it uncast chars, or otherSimon Tatham2010-04-17
| | | | | | things potentially not in the range 0..255). [originally from svn r8922]
* Patch from James H to fix a bug in which ambiguous puzzles wouldSimon Tatham2010-01-17
| | | | | | occasionally be generated, e.g. by 8x8de#417341658689473 . [originally from svn r8845]
* Don't use payload strings directly as the format for printf.Simon Tatham2010-01-13
| | | | [originally from svn r8839]
* Couple of small changes to Singles from James H which missed my mainSimon Tatham2010-01-12
| | | | | | | commit: tweak the grid generation a bit, and fix the use of the Solve function on a grid containing errors. [originally from svn r8835]
* New puzzle from James Harvey: 'Singles', an implementation ofSimon Tatham2010-01-11
Hitori. One infrastructure change in the process: latin.c has acquired a utility function to generate a latin rectangle rather than a full square. [originally from svn r8828]