chiark / gitweb /
Added an automatic `Solve' feature to most games. This is useful for
[sgt-puzzles.git] / nullgame.c
1 /*
2  * nullgame.c [FIXME]: Template defining the null game (in which no
3  * moves are permitted and nothing is ever drawn). This file exists
4  * solely as a basis for constructing new game definitions - it
5  * helps to have something which will compile from the word go and
6  * merely doesn't _do_ very much yet.
7  * 
8  * Parts labelled FIXME actually want _removing_ (e.g. the dummy
9  * field in each of the required data structures, and this entire
10  * comment itself) when converting this source file into one
11  * describing a real game.
12  */
13
14 #include <stdio.h>
15 #include <stdlib.h>
16 #include <string.h>
17 #include <assert.h>
18 #include <ctype.h>
19 #include <math.h>
20
21 #include "puzzles.h"
22
23 enum {
24     COL_BACKGROUND,
25     NCOLOURS
26 };
27
28 struct game_params {
29     int FIXME;
30 };
31
32 struct game_state {
33     int FIXME;
34 };
35
36 static game_params *default_params(void)
37 {
38     game_params *ret = snew(game_params);
39
40     ret->FIXME = 0;
41
42     return ret;
43 }
44
45 static int game_fetch_preset(int i, char **name, game_params **params)
46 {
47     return FALSE;
48 }
49
50 static void free_params(game_params *params)
51 {
52     sfree(params);
53 }
54
55 static game_params *dup_params(game_params *params)
56 {
57     game_params *ret = snew(game_params);
58     *ret = *params;                    /* structure copy */
59     return ret;
60 }
61
62 static game_params *decode_params(char const *string)
63 {
64     game_params *ret = snew(game_params);
65
66     ret->FIXME = 0;
67
68     return ret;
69 }
70
71 static char *encode_params(game_params *params)
72 {
73     return dupstr("FIXME");
74 }
75
76 static config_item *game_configure(game_params *params)
77 {
78     return NULL;
79 }
80
81 static game_params *custom_params(config_item *cfg)
82 {
83     return NULL;
84 }
85
86 static char *validate_params(game_params *params)
87 {
88     return NULL;
89 }
90
91 static char *new_game_seed(game_params *params, random_state *rs,
92                            game_aux_info **aux)
93 {
94     return dupstr("FIXME");
95 }
96
97 static void game_free_aux_info(game_aux_info *aux)
98 {
99     assert(!"Shouldn't happen");
100 }
101
102 static char *validate_seed(game_params *params, char *seed)
103 {
104     return NULL;
105 }
106
107 static game_state *new_game(game_params *params, char *seed)
108 {
109     game_state *state = snew(game_state);
110
111     state->FIXME = 0;
112
113     return state;
114 }
115
116 static game_state *dup_game(game_state *state)
117 {
118     game_state *ret = snew(game_state);
119
120     ret->FIXME = state->FIXME;
121
122     return ret;
123 }
124
125 static void free_game(game_state *state)
126 {
127     sfree(state);
128 }
129
130 static game_state *solve_game(game_state *state, game_aux_info *aux,
131                               char **error)
132 {
133     return NULL;
134 }
135
136 static char *game_text_format(game_state *state)
137 {
138     return NULL;
139 }
140
141 static game_ui *new_ui(game_state *state)
142 {
143     return NULL;
144 }
145
146 static void free_ui(game_ui *ui)
147 {
148 }
149
150 static game_state *make_move(game_state *from, game_ui *ui, int x, int y,
151                              int button)
152 {
153     return NULL;
154 }
155
156 /* ----------------------------------------------------------------------
157  * Drawing routines.
158  */
159
160 struct game_drawstate {
161     int FIXME;
162 };
163
164 static void game_size(game_params *params, int *x, int *y)
165 {
166     *x = *y = 200;                     /* FIXME */
167 }
168
169 static float *game_colours(frontend *fe, game_state *state, int *ncolours)
170 {
171     float *ret = snewn(3 * NCOLOURS, float);
172
173     frontend_default_colour(fe, &ret[COL_BACKGROUND * 3]);
174
175     *ncolours = NCOLOURS;
176     return ret;
177 }
178
179 static game_drawstate *game_new_drawstate(game_state *state)
180 {
181     struct game_drawstate *ds = snew(struct game_drawstate);
182
183     ds->FIXME = 0;
184
185     return ds;
186 }
187
188 static void game_free_drawstate(game_drawstate *ds)
189 {
190     sfree(ds);
191 }
192
193 static void game_redraw(frontend *fe, game_drawstate *ds, game_state *oldstate,
194                         game_state *state, int dir, game_ui *ui,
195                         float animtime, float flashtime)
196 {
197     /*
198      * The initial contents of the window are not guaranteed and
199      * can vary with front ends. To be on the safe side, all games
200      * should start by drawing a big background-colour rectangle
201      * covering the whole window.
202      */
203     draw_rect(fe, 0, 0, 200, 200, COL_BACKGROUND);
204 }
205
206 static float game_anim_length(game_state *oldstate, game_state *newstate,
207                               int dir)
208 {
209     return 0.0F;
210 }
211
212 static float game_flash_length(game_state *oldstate, game_state *newstate,
213                                int dir)
214 {
215     return 0.0F;
216 }
217
218 static int game_wants_statusbar(void)
219 {
220     return FALSE;
221 }
222
223 #ifdef COMBINED
224 #define thegame nullgame
225 #endif
226
227 const struct game thegame = {
228     "Null Game", NULL,
229     default_params,
230     game_fetch_preset,
231     decode_params,
232     encode_params,
233     free_params,
234     dup_params,
235     FALSE, game_configure, custom_params,
236     validate_params,
237     new_game_seed,
238     game_free_aux_info,
239     validate_seed,
240     new_game,
241     dup_game,
242     free_game,
243     FALSE, solve_game,
244     FALSE, game_text_format,
245     new_ui,
246     free_ui,
247     make_move,
248     game_size,
249     game_colours,
250     game_new_drawstate,
251     game_free_drawstate,
252     game_redraw,
253     game_anim_length,
254     game_flash_length,
255     game_wants_statusbar,
256 };