move.h

   1 #ifndef ZZGO_MOVE_H
   2 #define ZZGO_MOVE_H
   3
   4 #include <stdint.h>
   5 #include <string.h>
   6
   7 #include "stone.h"
   8
   9 typedef int coord_t;
  10
  11 #define coord_raw(c) (c)
  12 #define coord_x(c, b) ((c) % board_size(b))
  13 #define coord_y(c, b) ((c) / board_size(b))
  14 #define coord_eq(c1, c2) ((c1) == (c2))
  15 /* TODO: Smarter way to do this? */
  16 #define coord_dx(c1, c2, b) (coord_x(c1, b) - coord_x(c2, b))
  17 #define coord_dy(c1, c2, b) (coord_y(c1, b) - coord_y(c2, b))
  18
  19 static coord_t pass = -1;
  20 static coord_t resign = -2;
  21 #define is_pass(c) (coord_eq(c, pass))
  22 #define is_resign(c) (coord_eq(c, resign))
  23
  24 /* Initialize existing coord */
  25 #define coord_pos(coord, pos_, board) do { (coord) = (pos_); } while (0)
  26 #define coord_xy(board, x, y) ((x) + (y) * board_size(board))
  27 #define coord_xy_otf(x, y, board) coord_xy(board, x, y) // obsolete
  28
  29 #define coord_is_adjecent(c1, c2, b) (abs(c1 - c2) == 1 || abs(c1 - c2) == board_size(b))
  30 #define coord_is_8adjecent(c1, c2, b) (abs(c1 - c2) == 1 || abs(abs(c1 - c2) - board_size(b)) < 2)
  31
  32 /* dyn allocated */
  33 static coord_t *coord_init(int x, int y, int size);
  34 static coord_t *coord_copy(coord_t c);
  35 static coord_t *coord_pass(void);
  36 static coord_t *coord_resign(void);
  37 static void coord_done(coord_t *c);
  38
  39 struct board;
  40 /* Return coordinate string in a dynamically allocated buffer. Thread-safe. */
  41 char *coord2str(coord_t c, struct board *b);
  42 /* Return coordinate string in a static buffer; multiple buffers are shuffled
  43  * to enable use for multiple printf() parameters, but it is NOT safe for
  44  * anything but debugging - in particular, it is NOT thread-safe! */
  45 char *coord2sstr(coord_t c, struct board *b);
  46 coord_t *str2coord(char *str, int board_size);
  47
  48
  49 struct move {
  50         coord_t coord;
  51         enum stone color;
  52 };
  53
  54
  55
  56 static inline coord_t *
  57 coord_init(int x, int y, int size)
  58 {
  59         coord_t *c = calloc(1, sizeof(coord_t));
  60         *c = x + y * size;
  61         return c;
  62 }
  63
  64 static inline coord_t *
  65 coord_copy(coord_t c)
  66 {
  67         coord_t *c2 = calloc(1, sizeof(coord_t));
  68         memcpy(c2, &c, sizeof(c));
  69         return c2;
  70 }
  71
  72 static inline coord_t *
  73 coord_pass()
  74 {
  75         return coord_copy(pass);
  76 }
  77
  78 static inline coord_t *
  79 coord_resign()
  80 {
  81         return coord_copy(resign);
  82 }
  83
  84 static inline void
  85 coord_done(coord_t *c)
  86 {
  87         free(c);
  88 }
  89
  90 #endif