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