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 typedef struct blitter blitter;
  78
  79 #define ALIGN_VNORMAL 0x000
  80 #define ALIGN_VCENTRE 0x100
  81
  82 #define ALIGN_HLEFT   0x000
  83 #define ALIGN_HCENTRE 0x001
  84 #define ALIGN_HRIGHT  0x002
  85
  86 #define FONT_FIXED    0
  87 #define FONT_VARIABLE 1
  88
  89 /*
  90  * Structure used to pass configuration data between frontend and
  91  * game
  92  */
  93 enum { C_STRING, C_CHOICES, C_BOOLEAN, C_END };
  94 struct config_item {
  95     /*
  96      * `name' is never dynamically allocated.
  97      */
  98     char *name;
  99     /*
 100      * `type' contains one of the above values.
 101      */
 102     int type;
 103     /*
 104      * For C_STRING, `sval' is always dynamically allocated and
 105      * non-NULL. For C_BOOLEAN and C_END, `sval' is always NULL.
 106      * For C_CHOICES, `sval' is non-NULL, _not_ dynamically
 107      * allocated, and contains a set of option strings separated by
 108      * a delimiter. The delimeter is also the first character in
 109      * the string, so for example ":Foo:Bar:Baz" gives three
 110      * options `Foo', `Bar' and `Baz'.
 111      */
 112     char *sval;
 113     /*
 114      * For C_BOOLEAN, this is TRUE or FALSE. For C_CHOICES, it
 115      * indicates the chosen index from the `sval' list. In the
 116      * above example, 0==Foo, 1==Bar and 2==Baz.
 117      */
 118     int ival;
 119 };
 120
 121 /*
 122  * Platform routines
 123  */
 124
 125 #ifdef DEBUG
 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 fill, int colour);
 140 void draw_circle(frontend *fe, int cx, int cy, int radius,
 141                  int fill, int colour);
 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);
 188 char *midend_rewrite_statusbar(midend_data *me, char *text);
 189
 190 /*
 191  * malloc.c
 192  */
 193 void *smalloc(size_t size);
 194 void *srealloc(void *p, size_t size);
 195 void sfree(void *p);
 196 char *dupstr(const char *s);
 197 #define snew(type) \
 198     ( (type *) smalloc (sizeof (type)) )
 199 #define snewn(number, type) \
 200     ( (type *) smalloc ((number) * sizeof (type)) )
 201 #define sresize(array, number, type) \
 202     ( (type *) srealloc ((array), (number) * sizeof (type)) )
 203
 204 /*
 205  * misc.c
 206  */
 207 void free_cfg(config_item *cfg);
 208 void obfuscate_bitmap(unsigned char *bmp, int bits, int decode);
 209
 210 /* allocates output each time. len is always in bytes of binary data.
 211  * May assert (or just go wrong) if lengths are unchecked. */
 212 char *bin2hex(const unsigned char *in, int inlen);
 213 unsigned char *hex2bin(const char *in, int outlen);
 214
 215
 216 /*
 217  * version.c
 218  */
 219 extern char ver[];
 220
 221 /*
 222  * random.c
 223  */
 224 random_state *random_init(char *seed, int len);
 225 unsigned long random_bits(random_state *state, int bits);
 226 unsigned long random_upto(random_state *state, unsigned long limit);
 227 void random_free(random_state *state);
 228 char *random_state_encode(random_state *state);
 229 random_state *random_state_decode(char *input);
 230 /* random.c also exports SHA, which occasionally comes in useful. */
 231 typedef unsigned long uint32;
 232 typedef struct {
 233     uint32 h[5];
 234     unsigned char block[64];
 235     int blkused;
 236     uint32 lenhi, lenlo;
 237 } SHA_State;
 238 void SHA_Init(SHA_State *s);
 239 void SHA_Bytes(SHA_State *s, void *p, int len);
 240 void SHA_Final(SHA_State *s, unsigned char *output);
 241 void SHA_Simple(void *p, int len, unsigned char *output);
 242
 243 /*
 244  * Data structure containing the function calls and data specific
 245  * to a particular game. This is enclosed in a data structure so
 246  * that a particular platform can choose, if it wishes, to compile
 247  * all the games into a single combined executable rather than
 248  * having lots of little ones.
 249  */
 250 struct game {
 251     const char *name;
 252     const char *winhelp_topic;
 253     game_params *(*default_params)(void);
 254     int (*fetch_preset)(int i, char **name, game_params **params);
 255     void (*decode_params)(game_params *, char const *string);
 256     char *(*encode_params)(game_params *, int full);
 257     void (*free_params)(game_params *params);
 258     game_params *(*dup_params)(game_params *params);
 259     int can_configure;
 260     config_item *(*configure)(game_params *params);
 261     game_params *(*custom_params)(config_item *cfg);
 262     char *(*validate_params)(game_params *params);
 263     char *(*new_desc)(game_params *params, random_state *rs,
 264                       game_aux_info **aux, int interactive);
 265     void (*free_aux_info)(game_aux_info *aux);
 266     char *(*validate_desc)(game_params *params, char *desc);
 267     game_state *(*new_game)(midend_data *me, game_params *params, char *desc);
 268     game_state *(*dup_game)(game_state *state);
 269     void (*free_game)(game_state *state);
 270     int can_solve;
 271     game_state *(*solve)(game_state *orig, game_state *curr,
 272                          game_aux_info *aux, char **error);
 273     int can_format_as_text;
 274     char *(*text_format)(game_state *state);
 275     game_ui *(*new_ui)(game_state *state);
 276     void (*free_ui)(game_ui *ui);
 277     void (*changed_state)(game_ui *ui, game_state *oldstate,
 278                           game_state *newstate);
 279     game_state *(*make_move)(game_state *from, game_ui *ui, game_drawstate *ds,
 280                              int x, int y, int button);
 281     void (*size)(game_params *params, game_drawstate *ds, int *x, int *y,
 282                  int expand);
 283     float *(*colours)(frontend *fe, game_state *state, int *ncolours);
 284     game_drawstate *(*new_drawstate)(game_state *state);
 285     void (*free_drawstate)(game_drawstate *ds);
 286     void (*redraw)(frontend *fe, game_drawstate *ds, game_state *oldstate,
 287                    game_state *newstate, int dir, game_ui *ui, float anim_time,
 288                    float flash_time);
 289     float (*anim_length)(game_state *oldstate, game_state *newstate, int dir,
 290                          game_ui *ui);
 291     float (*flash_length)(game_state *oldstate, game_state *newstate, int dir,
 292                           game_ui *ui);
 293     int (*wants_statusbar)(void);
 294     int is_timed;
 295     int (*timing_state)(game_state *state);
 296     int mouse_priorities;
 297 };
 298
 299 /*
 300  * For one-game-at-a-time platforms, there's a single structure
 301  * like the above, under a fixed name. For all-at-once platforms,
 302  * there's a list of all available puzzles in array form.
 303  */
 304 #ifdef COMBINED
 305 extern const game *gamelist[];
 306 extern const int gamecount;
 307 #else
 308 extern const game thegame;
 309 #endif
 310
 311 #endif /* PUZZLES_PUZZLES_H */