README.md

   1 # solVIItaire
   2
   3 play klondike and spider solitaire in your unicode terminal.
   4
   5 ## TODO
   6
   7 ### P1
   8 ### P2
   9  * TODO: suggest moves (`h` => hint)
  10  * TODO: 'join to here' command (should take longest chain available)
  11  * TODO: escape sequences (for real cursor keys)
  12  * TODO: inverted moves (if A->B doesn't work, try B->A)
  13  * TODO: cleanup: in `x2y()` functions there is a lot of replication and noise
  14          when calculating legal moves, top cards, etc.
  15 ### P3
  16  * TODO: screen size > stack height => rendering issues!
  17  * TODO: differential drawing mode (at least for highlighting cards)
  18 ### P4
  19  * TODO: mouse mode (problems: finding position with `extreme_overlap`)
  20  * TODO: scores, variants: draw 3, max. n overturns
  21  * TODO: expose deal() seed for restarting the game
  22  * TODO: vt220 mode (problems: charset, slow baudrate and no differential drawing mode)
  23  * TODO: ed(1) mode (solEDaire): playable on a line printer; ascii/ibm only?
  24
  25 ### DONE
  26  * DONE: use `#ifdef`s to differentiate games (sol, spider, ed-sol, ed-spider)
  27  * DONE: keyboard alias: twice same key == waste/pile -> foundation
  28  * DONE: spider keyboard: `<from><to>` stacks; 1-9,0=tableu, return=draw
  29  * DONE: spider: easy/medium difficulty: only deal 1/2 suits instead of 4 -> deal()
  30  * DONE: patience: allow taking from 0(foundation)
  31  * DONE: highlight `from` pile, so users can see at what input stage they are
  32  * DONE: make piles 0-indexed in klondike as well
  33  * HOLD: duplicate card ♠A found in tableu: added check at start to monitor this
  34          Cannot reproduce, removed check
  35  * HOLD: bugs in spider's t2t()
  36          * once segfaulted on large column
  37          * sometimes doesn't work (ERR when it should be OK)
  38          Cannot reproduce
  39  * DONE: some input functions are in `x2y()` -- move them to `get_cmd()` (req.
  40          for mouse, hjkl modes)
  41  * DONE: sigint, sigcont handler! atexit() to avoid inconsistent term state
  42  * DONE: hjkl keyboard mode
  43  * DONE: more vim mode keys (first/last tableu)
  44  * DONE: online (key-)help `?`, `-h`, `-v` (NOTE: implemented -h, rest deemed
  45          not usedul)
  46  * DONE: extreme overlapping: if we are printing a sequence or multiple face down
  47          cards, only print `.overlap` lines of the ends, and `1` line for the
  48          middle cards
  49  * DONE: in direct addressing 'up to' dialog: make return/space select the lowest/highest option
  50  * DONE: undo:
  51          - insert append_undo() in x2y() functions
  52          - to encode stack position we need to overload `f.u.n` as index.
  53            (similar for foundation: overload `f.u.n` as foundation id)
  54          - w2f(): have to encode both stock index and foundation id
  55                   don't want to add a struct field for this one case;
  56                   for the time being (i.e. forever) I'm ORing waste index and
  57                   (foundation id<<16). ugly but works :/
  58          - turning over cards: this needs to be encoded, because the card might
  59            be consecutive and there's no way to tell what its previous state was.
  60             * indicate that a card was turned (can be at most 1) by negating u.n
  61               pros: no wasted space (it's just a boolean value), negation pattern
  62                     already used for closed cards
  63               cons: dirty C hack, less obvious than in other places, no need to
  64                     conserve memory this tightly
  65
  66 ## Notes
  67
  68  - terminology:
  69 ```
  70     {stock}[waste]    [4*foundation]
  71
  72     []   {}   {}   {}   {}   {}   {}
  73          []  (tableu piles)  {}   {}
  74               []   {}   {}   {}   {}
  75                    []   {}   {}   {}
  76                         []   {}   {}
  77                              []   {}
  78                                   []
  79 ```
  80  - data structures:
  81     - enum for each card (e.g. `SPADES_ACE`, `HEARTS_10`)
  82     - each pile is an array holding (13 open cards + up to 6 closed)
  83       [0] is the "northmost"/bottom-most card; unoccupied are NULL/NO_CARD
  84     - a single card is represented in the 'cards' enum; if it is closed, it is negated.
  85     - the foundation are 4 arrays of size 13
  86     - the stock pile is an array holding n cards and an index to the one to display
  87       when removing, decrement stack size and move all cards above index 1 over
  88     - previous states array: where to move which cards to get back to the state before
  89     - undo:
  90       double-linked list (follow `.prev` to undo, `.next` to redo)
  91       "N cards were moved from X to Y" (do Y->X to undo)
  92       allows jumping forwards in time as well (by repeating X->Y)
  93       warn: when appending state, must check if `.next` was non-NULL and free rest of chain if so.
  94  - multiple card sizes: schemes.h will store cards like below. if we want to draw a card
  95    that has one or more other cards below it, we only draw the first `.overlap` lines,
  96    otherwise if it is the last one, we draw the whole one.
  97    this will give a look like in `~/solitaire-tests`
  98 ```
  99     .grid=7, /*vertical alignment*/
 100     .overlap=2,
 101     .cards = [
 102        ["╭───╮",
 103         "│♠ X│",
 104         "│ ♠ │",
 105         "╰───╯",
 106           NULL],
 107     ]
 108     /*or:*/
 109     .grid=2,
 110     .overlap=1,
 111     .cards = [
 112       [ "🃖 ", NULL ],
 113     ]
 114 ```
 115 "open": face up card
 116 "closed": face down card