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_ui game_ui;
  74 typedef struct game_drawstate game_drawstate;
  75 typedef struct game game;
  76 typedef struct blitter blitter;
  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 /* We can't use #ifdef DEBUG, because Cygwin defines it by default. */
 125 #ifdef DEBUGGING
 126 #define debug(x) (debug_printf x)
 127 void debug_printf(char *fmt, ...);
 128 #else
 129 #define debug(x)
 130 #endif
 131
 132 void fatal(char *fmt, ...);
 133 void frontend_default_colour(frontend *fe, float *output);
 134 void draw_text(frontend *fe, int x, int y, int fonttype, int fontsize,
 135                int align, int colour, char *text);
 136 void draw_rect(frontend *fe, int x, int y, int w, int h, int colour);
 137 void draw_line(frontend *fe, int x1, int y1, int x2, int y2, int colour);
 138 void draw_polygon(frontend *fe, int *coords, int npoints,
 139                   int fillcolour, int outlinecolour);
 140 void draw_circle(frontend *fe, int cx, int cy, int radius,
 141                  int fillcolour, int outlinecolour);
 142 void clip(frontend *fe, int x, int y, int w, int h);
 143 void unclip(frontend *fe);
 144 void start_draw(frontend *fe);
 145 void draw_update(frontend *fe, int x, int y, int w, int h);
 146 void end_draw(frontend *fe);
 147 void deactivate_timer(frontend *fe);
 148 void activate_timer(frontend *fe);
 149 void status_bar(frontend *fe, char *text);
 150 void get_random_seed(void **randseed, int *randseedsize);
 151
 152 blitter *blitter_new(int w, int h);
 153 void blitter_free(blitter *bl);
 154 /* save puts the portion of the current display with top-left corner
 155  * (x,y) to the blitter. load puts it back again to the specified
 156  * coords, or else wherever it was saved from
 157  * (if x = y = BLITTER_FROMSAVED). */
 158 void blitter_save(frontend *fe, blitter *bl, int x, int y);
 159 #define BLITTER_FROMSAVED (-1)
 160 void blitter_load(frontend *fe, blitter *bl, int x, int y);
 161
 162 /*
 163  * midend.c
 164  */
 165 midend_data *midend_new(frontend *fe, const game *ourgame);
 166 void midend_free(midend_data *me);
 167 void midend_set_params(midend_data *me, game_params *params);
 168 void midend_size(midend_data *me, int *x, int *y, int expand);
 169 void midend_new_game(midend_data *me);
 170 void midend_restart_game(midend_data *me);
 171 void midend_stop_anim(midend_data *me);
 172 int midend_process_key(midend_data *me, int x, int y, int button);
 173 void midend_force_redraw(midend_data *me);
 174 void midend_redraw(midend_data *me);
 175 float *midend_colours(midend_data *me, int *ncolours);
 176 void midend_timer(midend_data *me, float tplus);
 177 int midend_num_presets(midend_data *me);
 178 void midend_fetch_preset(midend_data *me, int n,
 179                          char **name, game_params **params);
 180 int midend_wants_statusbar(midend_data *me);
 181 enum { CFG_SETTINGS, CFG_SEED, CFG_DESC };
 182 config_item *midend_get_config(midend_data *me, int which, char **wintitle);
 183 char *midend_set_config(midend_data *me, int which, config_item *cfg);
 184 char *midend_game_id(midend_data *me, char *id);
 185 char *midend_text_format(midend_data *me);
 186 char *midend_solve(midend_data *me);
 187 void midend_supersede_game_desc(midend_data *me, char *desc, char *privdesc);
 188 char *midend_rewrite_statusbar(midend_data *me, char *text);
 189 void midend_serialise(midend_data *me,
 190                       void (*write)(void *ctx, void *buf, int len),
 191                       void *wctx);
 192 char *midend_deserialise(midend_data *me,
 193                          int (*read)(void *ctx, void *buf, int len),
 194                          void *rctx);
 195
 196 /*
 197  * malloc.c
 198  */
 199 void *smalloc(size_t size);
 200 void *srealloc(void *p, size_t size);
 201 void sfree(void *p);
 202 char *dupstr(const char *s);
 203 #define snew(type) \
 204     ( (type *) smalloc (sizeof (type)) )
 205 #define snewn(number, type) \
 206     ( (type *) smalloc ((number) * sizeof (type)) )
 207 #define sresize(array, number, type) \
 208     ( (type *) srealloc ((array), (number) * sizeof (type)) )
 209
 210 /*
 211  * misc.c
 212  */
 213 void free_cfg(config_item *cfg);
 214 void obfuscate_bitmap(unsigned char *bmp, int bits, int decode);
 215
 216 /* allocates output each time. len is always in bytes of binary data.
 217  * May assert (or just go wrong) if lengths are unchecked. */
 218 char *bin2hex(const unsigned char *in, int inlen);
 219 unsigned char *hex2bin(const char *in, int outlen);
 220
 221
 222 /*
 223  * version.c
 224  */
 225 extern char ver[];
 226
 227 /*
 228  * random.c
 229  */
 230 random_state *random_init(char *seed, int len);
 231 unsigned long random_bits(random_state *state, int bits);
 232 unsigned long random_upto(random_state *state, unsigned long limit);
 233 void random_free(random_state *state);
 234 char *random_state_encode(random_state *state);
 235 random_state *random_state_decode(char *input);
 236 /* random.c also exports SHA, which occasionally comes in useful. */
 237 typedef unsigned long uint32;
 238 typedef struct {
 239     uint32 h[5];
 240     unsigned char block[64];
 241     int blkused;
 242     uint32 lenhi, lenlo;
 243 } SHA_State;
 244 void SHA_Init(SHA_State *s);
 245 void SHA_Bytes(SHA_State *s, void *p, int len);
 246 void SHA_Final(SHA_State *s, unsigned char *output);
 247 void SHA_Simple(void *p, int len, unsigned char *output);
 248
 249 /*
 250  * Data structure containing the function calls and data specific
 251  * to a particular game. This is enclosed in a data structure so
 252  * that a particular platform can choose, if it wishes, to compile
 253  * all the games into a single combined executable rather than
 254  * having lots of little ones.
 255  */
 256 struct game {
 257     const char *name;
 258     const char *winhelp_topic;
 259     game_params *(*default_params)(void);
 260     int (*fetch_preset)(int i, char **name, game_params **params);
 261     void (*decode_params)(game_params *, char const *string);
 262     char *(*encode_params)(game_params *, int full);
 263     void (*free_params)(game_params *params);
 264     game_params *(*dup_params)(game_params *params);
 265     int can_configure;
 266     config_item *(*configure)(game_params *params);
 267     game_params *(*custom_params)(config_item *cfg);
 268     char *(*validate_params)(game_params *params);
 269     char *(*new_desc)(game_params *params, random_state *rs,
 270                       char **aux, int interactive);
 271     char *(*validate_desc)(game_params *params, char *desc);
 272     game_state *(*new_game)(midend_data *me, game_params *params, char *desc);
 273     game_state *(*dup_game)(game_state *state);
 274     void (*free_game)(game_state *state);
 275     int can_solve;
 276     char *(*solve)(game_state *orig, game_state *curr,
 277                    char *aux, char **error);
 278     int can_format_as_text;
 279     char *(*text_format)(game_state *state);
 280     game_ui *(*new_ui)(game_state *state);
 281     void (*free_ui)(game_ui *ui);
 282     char *(*encode_ui)(game_ui *ui);
 283     void (*decode_ui)(game_ui *ui, char *encoding);
 284     void (*changed_state)(game_ui *ui, game_state *oldstate,
 285                           game_state *newstate);
 286     char *(*interpret_move)(game_state *state, game_ui *ui, game_drawstate *ds,
 287                             int x, int y, int button);
 288     game_state *(*execute_move)(game_state *state, char *move);
 289     void (*size)(game_params *params, game_drawstate *ds, int *x, int *y,
 290                  int expand);
 291     float *(*colours)(frontend *fe, game_state *state, int *ncolours);
 292     game_drawstate *(*new_drawstate)(game_state *state);
 293     void (*free_drawstate)(game_drawstate *ds);
 294     void (*redraw)(frontend *fe, game_drawstate *ds, game_state *oldstate,
 295                    game_state *newstate, int dir, game_ui *ui, float anim_time,
 296                    float flash_time);
 297     float (*anim_length)(game_state *oldstate, game_state *newstate, int dir,
 298                          game_ui *ui);
 299     float (*flash_length)(game_state *oldstate, game_state *newstate, int dir,
 300                           game_ui *ui);
 301     int (*wants_statusbar)(void);
 302     int is_timed;
 303     int (*timing_state)(game_state *state);
 304     int mouse_priorities;
 305 };
 306
 307 /*
 308  * For one-game-at-a-time platforms, there's a single structure
 309  * like the above, under a fixed name. For all-at-once platforms,
 310  * there's a list of all available puzzles in array form.
 311  */
 312 #ifdef COMBINED
 313 extern const game *gamelist[];
 314 extern const int gamecount;
 315 #else
 316 extern const game thegame;
 317 #endif
 318
 319 #endif /* PUZZLES_PUZZLES_H */