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
  47     /* made smaller because of 'limited range of datatype' errors. */
  48     MOD_CTRL       = 0x1000,
  49     MOD_SHFT       = 0x2000,
  50     MOD_NUM_KEYPAD = 0x4000,
  51     MOD_MASK       = 0x7000 /* mask for all modifiers */
  52 };
  53
  54 #define IS_MOUSE_DOWN(m) ( (unsigned)((m) - LEFT_BUTTON) <= \
  55                                (unsigned)(RIGHT_BUTTON - LEFT_BUTTON))
  56 #define IS_MOUSE_DRAG(m) ( (unsigned)((m) - LEFT_DRAG) <= \
  57                                (unsigned)(RIGHT_DRAG - LEFT_DRAG))
  58 #define IS_MOUSE_RELEASE(m) ( (unsigned)((m) - LEFT_RELEASE) <= \
  59                                (unsigned)(RIGHT_RELEASE - LEFT_RELEASE))
  60
  61 /* Bit flags indicating mouse button priorities */
  62 #define BUTTON_BEATS(x,y) ( 1 << (((x)-LEFT_BUTTON)*3+(y)-LEFT_BUTTON) )
  63
  64 #define IGNOREARG(x) ( (x) = (x) )
  65
  66 typedef struct frontend frontend;
  67 typedef struct config_item config_item;
  68 typedef struct midend_data midend_data;
  69 typedef struct random_state random_state;
  70 typedef struct game_params game_params;
  71 typedef struct game_state game_state;
  72 typedef struct game_aux_info game_aux_info;
  73 typedef struct game_ui game_ui;
  74 typedef struct game_drawstate game_drawstate;
  75 typedef struct game game;
  76
  77 #define ALIGN_VNORMAL 0x000
  78 #define ALIGN_VCENTRE 0x100
  79
  80 #define ALIGN_HLEFT   0x000
  81 #define ALIGN_HCENTRE 0x001
  82 #define ALIGN_HRIGHT  0x002
  83
  84 #define FONT_FIXED    0
  85 #define FONT_VARIABLE 1
  86
  87 /*
  88  * Structure used to pass configuration data between frontend and
  89  * game
  90  */
  91 enum { C_STRING, C_CHOICES, C_BOOLEAN, C_END };
  92 struct config_item {
  93     /*
  94      * `name' is never dynamically allocated.
  95      */
  96     char *name;
  97     /*
  98      * `type' contains one of the above values.
  99      */
 100     int type;
 101     /*
 102      * For C_STRING, `sval' is always dynamically allocated and
 103      * non-NULL. For C_BOOLEAN and C_END, `sval' is always NULL.
 104      * For C_CHOICES, `sval' is non-NULL, _not_ dynamically
 105      * allocated, and contains a set of option strings separated by
 106      * a delimiter. The delimeter is also the first character in
 107      * the string, so for example ":Foo:Bar:Baz" gives three
 108      * options `Foo', `Bar' and `Baz'.
 109      */
 110     char *sval;
 111     /*
 112      * For C_BOOLEAN, this is TRUE or FALSE. For C_CHOICES, it
 113      * indicates the chosen index from the `sval' list. In the
 114      * above example, 0==Foo, 1==Bar and 2==Baz.
 115      */
 116     int ival;
 117 };
 118
 119 /*
 120  * Platform routines
 121  */
 122
 123 #ifdef DEBUG
 124 #define debug(x) (debug_printf x)
 125 void debug_printf(char *fmt, ...);
 126 #else
 127 #define debug(x)
 128 #endif
 129
 130 void fatal(char *fmt, ...);
 131 void frontend_default_colour(frontend *fe, float *output);
 132 void draw_text(frontend *fe, int x, int y, int fonttype, int fontsize,
 133                int align, int colour, char *text);
 134 void draw_rect(frontend *fe, int x, int y, int w, int h, int colour);
 135 void draw_line(frontend *fe, int x1, int y1, int x2, int y2, int colour);
 136 void draw_polygon(frontend *fe, int *coords, int npoints,
 137                   int fill, int colour);
 138 void clip(frontend *fe, int x, int y, int w, int h);
 139 void unclip(frontend *fe);
 140 void start_draw(frontend *fe);
 141 void draw_update(frontend *fe, int x, int y, int w, int h);
 142 void end_draw(frontend *fe);
 143 void deactivate_timer(frontend *fe);
 144 void activate_timer(frontend *fe);
 145 void status_bar(frontend *fe, char *text);
 146 void get_random_seed(void **randseed, int *randseedsize);
 147
 148 /*
 149  * midend.c
 150  */
 151 midend_data *midend_new(frontend *fe, const game *ourgame);
 152 void midend_free(midend_data *me);
 153 void midend_set_params(midend_data *me, game_params *params);
 154 void midend_size(midend_data *me, int *x, int *y);
 155 void midend_new_game(midend_data *me);
 156 void midend_restart_game(midend_data *me);
 157 void midend_stop_anim(midend_data *me);
 158 int midend_process_key(midend_data *me, int x, int y, int button);
 159 void midend_force_redraw(midend_data *me);
 160 void midend_redraw(midend_data *me);
 161 float *midend_colours(midend_data *me, int *ncolours);
 162 void midend_timer(midend_data *me, float tplus);
 163 int midend_num_presets(midend_data *me);
 164 void midend_fetch_preset(midend_data *me, int n,
 165                          char **name, game_params **params);
 166 int midend_wants_statusbar(midend_data *me);
 167 enum { CFG_SETTINGS, CFG_SEED, CFG_DESC };
 168 config_item *midend_get_config(midend_data *me, int which, char **wintitle);
 169 char *midend_set_config(midend_data *me, int which, config_item *cfg);
 170 char *midend_game_id(midend_data *me, char *id);
 171 char *midend_text_format(midend_data *me);
 172 char *midend_solve(midend_data *me);
 173 void midend_supersede_game_desc(midend_data *me, char *desc);
 174 char *midend_rewrite_statusbar(midend_data *me, char *text);
 175
 176 /*
 177  * malloc.c
 178  */
 179 void *smalloc(size_t size);
 180 void *srealloc(void *p, size_t size);
 181 void sfree(void *p);
 182 char *dupstr(const char *s);
 183 #define snew(type) \
 184     ( (type *) smalloc (sizeof (type)) )
 185 #define snewn(number, type) \
 186     ( (type *) smalloc ((number) * sizeof (type)) )
 187 #define sresize(array, number, type) \
 188     ( (type *) srealloc ((array), (number) * sizeof (type)) )
 189
 190 /*
 191  * misc.c
 192  */
 193 void free_cfg(config_item *cfg);
 194
 195 /*
 196  * version.c
 197  */
 198 extern char ver[];
 199
 200 /*
 201  * random.c
 202  */
 203 random_state *random_init(char *seed, int len);
 204 unsigned long random_bits(random_state *state, int bits);
 205 unsigned long random_upto(random_state *state, unsigned long limit);
 206 void random_free(random_state *state);
 207 char *random_state_encode(random_state *state);
 208 random_state *random_state_decode(char *input);
 209 /* random.c also exports SHA, which occasionally comes in useful. */
 210 typedef unsigned long uint32;
 211 typedef struct {
 212     uint32 h[5];
 213     unsigned char block[64];
 214     int blkused;
 215     uint32 lenhi, lenlo;
 216 } SHA_State;
 217 void SHA_Init(SHA_State *s);
 218 void SHA_Bytes(SHA_State *s, void *p, int len);
 219 void SHA_Final(SHA_State *s, unsigned char *output);
 220 void SHA_Simple(void *p, int len, unsigned char *output);
 221
 222 /*
 223  * Data structure containing the function calls and data specific
 224  * to a particular game. This is enclosed in a data structure so
 225  * that a particular platform can choose, if it wishes, to compile
 226  * all the games into a single combined executable rather than
 227  * having lots of little ones.
 228  */
 229 struct game {
 230     const char *name;
 231     const char *winhelp_topic;
 232     game_params *(*default_params)(void);
 233     int (*fetch_preset)(int i, char **name, game_params **params);
 234     void (*decode_params)(game_params *, char const *string);
 235     char *(*encode_params)(game_params *, int full);
 236     void (*free_params)(game_params *params);
 237     game_params *(*dup_params)(game_params *params);
 238     int can_configure;
 239     config_item *(*configure)(game_params *params);
 240     game_params *(*custom_params)(config_item *cfg);
 241     char *(*validate_params)(game_params *params);
 242     char *(*new_desc)(game_params *params, random_state *rs,
 243                       game_aux_info **aux, int interactive);
 244     void (*free_aux_info)(game_aux_info *aux);
 245     char *(*validate_desc)(game_params *params, char *desc);
 246     game_state *(*new_game)(midend_data *me, game_params *params, char *desc);
 247     game_state *(*dup_game)(game_state *state);
 248     void (*free_game)(game_state *state);
 249     int can_solve;
 250     game_state *(*solve)(game_state *state, game_aux_info *aux, char **error);
 251     int can_format_as_text;
 252     char *(*text_format)(game_state *state);
 253     game_ui *(*new_ui)(game_state *state);
 254     void (*free_ui)(game_ui *ui);
 255     void (*changed_state)(game_ui *ui, game_state *oldstate,
 256                           game_state *newstate);
 257     game_state *(*make_move)(game_state *from, game_ui *ui, game_drawstate *ds,
 258                              int x, int y, int button);
 259     void (*size)(game_params *params, int *x, int *y);
 260     float *(*colours)(frontend *fe, game_state *state, int *ncolours);
 261     game_drawstate *(*new_drawstate)(game_state *state);
 262     void (*free_drawstate)(game_drawstate *ds);
 263     void (*redraw)(frontend *fe, game_drawstate *ds, game_state *oldstate,
 264                    game_state *newstate, int dir, game_ui *ui, float anim_time,
 265                    float flash_time);
 266     float (*anim_length)(game_state *oldstate, game_state *newstate, int dir,
 267                          game_ui *ui);
 268     float (*flash_length)(game_state *oldstate, game_state *newstate, int dir,
 269                           game_ui *ui);
 270     int (*wants_statusbar)(void);
 271     int is_timed;
 272     int (*timing_state)(game_state *state);
 273     int mouse_priorities;
 274 };
 275
 276 /*
 277  * For one-game-at-a-time platforms, there's a single structure
 278  * like the above, under a fixed name. For all-at-once platforms,
 279  * there's a list of all available puzzles in array form.
 280  */
 281 #ifdef COMBINED
 282 extern const game *gamelist[];
 283 extern const int gamecount;
 284 #else
 285 extern const game thegame;
 286 #endif
 287
 288 #endif /* PUZZLES_PUZZLES_H */