2 * midend.c: general middle fragment sitting between the
3 * platform-specific front end and game-specific back end.
4 * Maintains a move list, takes care of Undo and Redo commands, and
5 * processes standard keystrokes for undo/redo/new/restart/quit.
15 int nstates, statesize, statepos;
20 #define ensure(me) do { \
21 if ((me)->nstates >= (me)->statesize) { \
22 (me)->statesize = (me)->nstates + 128; \
23 (me)->states = sresize((me)->states, (me)->statesize, game_state *); \
27 midend_data *midend_new(void)
29 midend_data *me = snew(midend_data);
31 me->nstates = me->statesize = me->statepos = 0;
33 me->params = default_params();
39 void midend_free(midend_data *me)
43 free_params(me->params);
47 void midend_size(midend_data *me, int *x, int *y)
49 game_size(me->params, x, y);
52 void midend_set_params(midend_data *me, game_params *params)
54 free_params(me->params);
58 void midend_new_game(midend_data *me, char *seed)
60 while (me->nstates > 0)
61 free_game(me->states[--me->nstates]);
63 assert(me->nstates == 0);
67 me->seed = dupstr(seed);
69 me->seed = new_game_seed(me->params);
72 me->states[me->nstates++] = new_game(me->params, me->seed);
76 void midend_restart_game(midend_data *me)
78 while (me->nstates > 1)
79 free_game(me->states[--me->nstates]);
80 me->statepos = me->nstates;
83 void midend_undo(midend_data *me)
89 void midend_redo(midend_data *me)
91 if (me->statepos < me->nstates)
95 int midend_process_key(midend_data *me, int x, int y, int button)
99 if (button == 'n' || button == 'N' || button == '\x0E') {
100 midend_new_game(me, NULL);
102 } else if (button == 'r' || button == 'R') {
103 midend_restart_game(me);
105 } else if (button == 'u' || button == 'u' ||
106 button == '\x1A' || button == '\x1F') {
109 } else if (button == '\x12') {
112 } else if (button == 'q' || button == 'Q' || button == '\x11') {
116 s = make_move(me->states[me->statepos-1], x, y, button);
119 while (me->nstates > me->statepos)
120 free_game(me->states[--me->nstates]);
122 me->states[me->nstates] = s;
123 me->statepos = ++me->nstates;