mdw@git.distorted.org.uk Git - sgt/puzzles/blob - puzzles.h

   1 /*
   2  * puzzles.h: header file for my puzzle collection
   3  */
   4
   5 #ifndef PUZZLES_PUZZLES_H
   6 #define PUZZLES_PUZZLES_H
   7
   8 #include <stdlib.h> /* for size_t */
   9
  10 #ifndef TRUE
  11 #define TRUE 1
  12 #endif
  13 #ifndef FALSE
  14 #define FALSE 0
  15 #endif
  16
  17 #define PI 3.141592653589793238462643383279502884197169399
  18
  19 #define lenof(array) ( sizeof(array) / sizeof(*(array)) )
  20
  21 #define STR_INT(x) #x
  22 #define STR(x) STR_INT(x)
  23
  24 /* NB not perfect because they evaluate arguments multiple times. */
  25 #ifndef max
  26 #define max(x,y) ( (x)>(y) ? (x) : (y) )
  27 #endif /* max */
  28 #ifndef min
  29 #define min(x,y) ( (x)<(y) ? (x) : (y) )
  30 #endif /* min */
  31
  32 enum {
  33     LEFT_BUTTON = 0x0200,
  34     MIDDLE_BUTTON,
  35     RIGHT_BUTTON,
  36     LEFT_DRAG,
  37     MIDDLE_DRAG,
  38     RIGHT_DRAG,
  39     LEFT_RELEASE,
  40     MIDDLE_RELEASE,
  41     RIGHT_RELEASE,
  42     CURSOR_UP,
  43     CURSOR_DOWN,
  44     CURSOR_LEFT,
  45     CURSOR_RIGHT,
  46     CURSOR_SELECT,
  47
  48     /* made smaller because of 'limited range of datatype' errors. */
  49     MOD_CTRL       = 0x1000,
  50     MOD_SHFT       = 0x2000,
  51     MOD_NUM_KEYPAD = 0x4000,
  52     MOD_MASK       = 0x7000 /* mask for all modifiers */
  53 };
  54
  55 #define IS_MOUSE_DOWN(m) ( (unsigned)((m) - LEFT_BUTTON) <= \
  56                                (unsigned)(RIGHT_BUTTON - LEFT_BUTTON))
  57 #define IS_MOUSE_DRAG(m) ( (unsigned)((m) - LEFT_DRAG) <= \
  58                                (unsigned)(RIGHT_DRAG - LEFT_DRAG))
  59 #define IS_MOUSE_RELEASE(m) ( (unsigned)((m) - LEFT_RELEASE) <= \
  60                                (unsigned)(RIGHT_RELEASE - LEFT_RELEASE))
  61
  62 /* Bit flags indicating mouse button priorities */
  63 #define BUTTON_BEATS(x,y) ( 1 << (((x)-LEFT_BUTTON)*3+(y)-LEFT_BUTTON) )
  64
  65 #define IGNOREARG(x) ( (x) = (x) )
  66
  67 typedef struct frontend frontend;
  68 typedef struct config_item config_item;
  69 typedef struct midend_data midend_data;
  70 typedef struct random_state random_state;
  71 typedef struct game_params game_params;
  72 typedef struct game_state game_state;
  73 typedef struct game_aux_info game_aux_info;
  74 typedef struct game_ui game_ui;
  75 typedef struct game_drawstate game_drawstate;
  76 typedef struct game game;
  77
  78 #define ALIGN_VNORMAL 0x000
  79 #define ALIGN_VCENTRE 0x100
  80
  81 #define ALIGN_HLEFT   0x000
  82 #define ALIGN_HCENTRE 0x001
  83 #define ALIGN_HRIGHT  0x002
  84
  85 #define FONT_FIXED    0
  86 #define FONT_VARIABLE 1
  87
  88 /*
  89  * Structure used to pass configuration data between frontend and
  90  * game
  91  */
  92 enum { C_STRING, C_CHOICES, C_BOOLEAN, C_END };
  93 struct config_item {
  94     /*
  95      * `name' is never dynamically allocated.
  96      */
  97     char *name;
  98     /*
  99      * `type' contains one of the above values.
 100      */
 101     int type;
 102     /*
 103      * For C_STRING, `sval' is always dynamically allocated and
 104      * non-NULL. For C_BOOLEAN and C_END, `sval' is always NULL.
 105      * For C_CHOICES, `sval' is non-NULL, _not_ dynamically
 106      * allocated, and contains a set of option strings separated by
 107      * a delimiter. The delimeter is also the first character in
 108      * the string, so for example ":Foo:Bar:Baz" gives three
 109      * options `Foo', `Bar' and `Baz'.
 110      */
 111     char *sval;
 112     /*
 113      * For C_BOOLEAN, this is TRUE or FALSE. For C_CHOICES, it
 114      * indicates the chosen index from the `sval' list. In the
 115      * above example, 0==Foo, 1==Bar and 2==Baz.
 116      */
 117     int ival;
 118 };
 119
 120 /*
 121  * Platform routines
 122  */
 123
 124 #ifdef DEBUG
 125 #define debug(x) (debug_printf x)
 126 void debug_printf(char *fmt, ...);
 127 #else
 128 #define debug(x)
 129 #endif
 130
 131 void fatal(char *fmt, ...);
 132 void frontend_default_colour(frontend *fe, float *output);
 133 void draw_text(frontend *fe, int x, int y, int fonttype, int fontsize,
 134                int align, int colour, char *text);
 135 void draw_rect(frontend *fe, int x, int y, int w, int h, int colour);
 136 void draw_line(frontend *fe, int x1, int y1, int x2, int y2, int colour);
 137 void draw_polygon(frontend *fe, int *coords, int npoints,
 138                   int fill, int colour);
 139 void clip(frontend *fe, int x, int y, int w, int h);
 140 void unclip(frontend *fe);
 141 void start_draw(frontend *fe);
 142 void draw_update(frontend *fe, int x, int y, int w, int h);
 143 void end_draw(frontend *fe);
 144 void deactivate_timer(frontend *fe);
 145 void activate_timer(frontend *fe);
 146 void status_bar(frontend *fe, char *text);
 147 void get_random_seed(void **randseed, int *randseedsize);
 148
 149 /*
 150  * midend.c
 151  */
 152 midend_data *midend_new(frontend *fe, const game *ourgame);
 153 void midend_free(midend_data *me);
 154 void midend_set_params(midend_data *me, game_params *params);
 155 void midend_size(midend_data *me, int *x, int *y, int expand);
 156 void midend_new_game(midend_data *me);
 157 void midend_restart_game(midend_data *me);
 158 void midend_stop_anim(midend_data *me);
 159 int midend_process_key(midend_data *me, int x, int y, int button);
 160 void midend_force_redraw(midend_data *me);
 161 void midend_redraw(midend_data *me);
 162 float *midend_colours(midend_data *me, int *ncolours);
 163 void midend_timer(midend_data *me, float tplus);
 164 int midend_num_presets(midend_data *me);
 165 void midend_fetch_preset(midend_data *me, int n,
 166                          char **name, game_params **params);
 167 int midend_wants_statusbar(midend_data *me);
 168 enum { CFG_SETTINGS, CFG_SEED, CFG_DESC };
 169 config_item *midend_get_config(midend_data *me, int which, char **wintitle);
 170 char *midend_set_config(midend_data *me, int which, config_item *cfg);
 171 char *midend_game_id(midend_data *me, char *id);
 172 char *midend_text_format(midend_data *me);
 173 char *midend_solve(midend_data *me);
 174 void midend_supersede_game_desc(midend_data *me, char *desc);
 175 char *midend_rewrite_statusbar(midend_data *me, char *text);
 176
 177 /*
 178  * malloc.c
 179  */
 180 void *smalloc(size_t size);
 181 void *srealloc(void *p, size_t size);
 182 void sfree(void *p);
 183 char *dupstr(const char *s);
 184 #define snew(type) \
 185     ( (type *) smalloc (sizeof (type)) )
 186 #define snewn(number, type) \
 187     ( (type *) smalloc ((number) * sizeof (type)) )
 188 #define sresize(array, number, type) \
 189     ( (type *) srealloc ((array), (number) * sizeof (type)) )
 190
 191 /*
 192  * misc.c
 193  */
 194 void free_cfg(config_item *cfg);
 195
 196 /*
 197  * version.c
 198  */
 199 extern char ver[];
 200
 201 /*
 202  * random.c
 203  */
 204 random_state *random_init(char *seed, int len);
 205 unsigned long random_bits(random_state *state, int bits);
 206 unsigned long random_upto(random_state *state, unsigned long limit);
 207 void random_free(random_state *state);
 208 char *random_state_encode(random_state *state);
 209 random_state *random_state_decode(char *input);
 210 /* random.c also exports SHA, which occasionally comes in useful. */
 211 typedef unsigned long uint32;
 212 typedef struct {
 213     uint32 h[5];
 214     unsigned char block[64];
 215     int blkused;
 216     uint32 lenhi, lenlo;
 217 } SHA_State;
 218 void SHA_Init(SHA_State *s);
 219 void SHA_Bytes(SHA_State *s, void *p, int len);
 220 void SHA_Final(SHA_State *s, unsigned char *output);
 221 void SHA_Simple(void *p, int len, unsigned char *output);
 222
 223 /*
 224  * Data structure containing the function calls and data specific
 225  * to a particular game. This is enclosed in a data structure so
 226  * that a particular platform can choose, if it wishes, to compile
 227  * all the games into a single combined executable rather than
 228  * having lots of little ones.
 229  */
 230 struct game {
 231     const char *name;
 232     const char *winhelp_topic;
 233     game_params *(*default_params)(void);
 234     int (*fetch_preset)(int i, char **name, game_params **params);
 235     void (*decode_params)(game_params *, char const *string);
 236     char *(*encode_params)(game_params *, int full);
 237     void (*free_params)(game_params *params);
 238     game_params *(*dup_params)(game_params *params);
 239     int can_configure;
 240     config_item *(*configure)(game_params *params);
 241     game_params *(*custom_params)(config_item *cfg);
 242     char *(*validate_params)(game_params *params);
 243     char *(*new_desc)(game_params *params, random_state *rs,
 244                       game_aux_info **aux, int interactive);
 245     void (*free_aux_info)(game_aux_info *aux);
 246     char *(*validate_desc)(game_params *params, char *desc);
 247     game_state *(*new_game)(midend_data *me, game_params *params, char *desc);
 248     game_state *(*dup_game)(game_state *state);
 249     void (*free_game)(game_state *state);
 250     int can_solve;
 251     game_state *(*solve)(game_state *state, game_aux_info *aux, char **error);
 252     int can_format_as_text;
 253     char *(*text_format)(game_state *state);
 254     game_ui *(*new_ui)(game_state *state);
 255     void (*free_ui)(game_ui *ui);
 256     void (*changed_state)(game_ui *ui, game_state *oldstate,
 257                           game_state *newstate);
 258     game_state *(*make_move)(game_state *from, game_ui *ui, game_drawstate *ds,
 259                              int x, int y, int button);
 260     void (*size)(game_params *params, game_drawstate *ds, int *x, int *y,
 261                  int expand);
 262     float *(*colours)(frontend *fe, game_state *state, int *ncolours);
 263     game_drawstate *(*new_drawstate)(game_state *state);
 264     void (*free_drawstate)(game_drawstate *ds);
 265     void (*redraw)(frontend *fe, game_drawstate *ds, game_state *oldstate,
 266                    game_state *newstate, int dir, game_ui *ui, float anim_time,
 267                    float flash_time);
 268     float (*anim_length)(game_state *oldstate, game_state *newstate, int dir,
 269                          game_ui *ui);
 270     float (*flash_length)(game_state *oldstate, game_state *newstate, int dir,
 271                           game_ui *ui);
 272     int (*wants_statusbar)(void);
 273     int is_timed;
 274     int (*timing_state)(game_state *state);
 275     int mouse_priorities;
 276 };
 277
 278 /*
 279  * For one-game-at-a-time platforms, there's a single structure
 280  * like the above, under a fixed name. For all-at-once platforms,
 281  * there's a list of all available puzzles in array form.
 282  */
 283 #ifdef COMBINED
 284 extern const game *gamelist[];
 285 extern const int gamecount;
 286 #else
 287 extern const game thegame;
 288 #endif
 289
 290 #endif /* PUZZLES_PUZZLES_H */