move.h

   1 #ifndef ZZGO_MOVE_H
   2 #define ZZGO_MOVE_H
   3
   4 #include <stdint.h>
   5 #include <string.h>
   6
   7 #include "util.h"
   8 #include "stone.h"
   9
  10 typedef int coord_t;
  11
  12 #define coord_raw(c) (c)
  13 #define coord_x(c, b) ((c) % board_size(b))
  14 #define coord_y(c, b) ((c) / board_size(b))
  15 #define coord_eq(c1, c2) ((c1) == (c2))
  16 /* TODO: Smarter way to do this? */
  17 #define coord_dx(c1, c2, b) (coord_x(c1, b) - coord_x(c2, b))
  18 #define coord_dy(c1, c2, b) (coord_y(c1, b) - coord_y(c2, b))
  19
  20 static coord_t pass = -1;
  21 static coord_t resign = -2;
  22 #define is_pass(c) (coord_eq(c, pass))
  23 #define is_resign(c) (coord_eq(c, resign))
  24
  25 /* Initialize existing coord */
  26 #define coord_pos(coord, pos_, board) do { (coord) = (pos_); } while (0)
  27 #define coord_xy(board, x, y) ((x) + (y) * board_size(board))
  28 #define coord_xy_otf(x, y, board) coord_xy(board, x, y) // obsolete
  29
  30 #define coord_is_adjecent(c1, c2, b) (abs(c1 - c2) == 1 || abs(c1 - c2) == board_size(b))
  31 #define coord_is_8adjecent(c1, c2, b) (abs(c1 - c2) == 1 || abs(abs(c1 - c2) - board_size(b)) < 2)
  32
  33 /* dyn allocated */
  34 static coord_t *coord_init(int x, int y, int size);
  35 static coord_t *coord_copy(coord_t c);
  36 static coord_t *coord_pass(void);
  37 static coord_t *coord_resign(void);
  38 static void coord_done(coord_t *c);
  39
  40 struct board;
  41 /* Return coordinate string in a dynamically allocated buffer. Thread-safe. */
  42 char *coord2str(coord_t c, struct board *b);
  43 /* Return coordinate string in a static buffer; multiple buffers are shuffled
  44  * to enable use for multiple printf() parameters, but it is NOT safe for
  45  * anything but debugging - in particular, it is NOT thread-safe! */
  46 char *coord2sstr(coord_t c, struct board *b);
  47 coord_t *str2coord(char *str, int board_size);
  48
  49
  50 struct move {
  51         coord_t coord;
  52         enum stone color;
  53 };
  54
  55
  56
  57 static inline coord_t *
  58 coord_init(int x, int y, int size)
  59 {
  60         coord_t *c = calloc2(1, sizeof(coord_t));
  61         *c = x + y * size;
  62         return c;
  63 }
  64
  65 static inline coord_t *
  66 coord_copy(coord_t c)
  67 {
  68         coord_t *c2 = calloc2(1, sizeof(coord_t));
  69         memcpy(c2, &c, sizeof(c));
  70         return c2;
  71 }
  72
  73 static inline coord_t *
  74 coord_pass()
  75 {
  76         return coord_copy(pass);
  77 }
  78
  79 static inline coord_t *
  80 coord_resign()
  81 {
  82         return coord_copy(resign);
  83 }
  84
  85 static inline void
  86 coord_done(coord_t *c)
  87 {
  88         free(c);
  89 }
  90
  91 #endif