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 struct board;
  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
  17 static coord_t pass = -1;
  18 static coord_t resign = -2;
  19 #define is_pass(c) (coord_eq(c, pass))
  20 #define is_resign(c) (coord_eq(c, resign))
  21
  22 /* Initialize existing coord */
  23 #define coord_pos(coord, pos_, board) do { (coord) = (pos_); } while (0)
  24 #define coord_xy(board, x, y) ((x) + (y) * board_size(board))
  25 #define coord_xy_otf(x, y, board) coord_xy(board, x, y) // obsolete
  26
  27 #define coord_is_adjecent(c1, c2, b) (abs(c1 - c2) == 1 || abs(c1 - c2) == board_size(b))
  28 #define coord_is_8adjecent(c1, c2, b) (abs(c1 - c2) == 1 || abs(abs(c1 - c2) - board_size(b)) < 2)
  29
  30 /* dyn allocated */
  31 static coord_t *coord_init(int x, int y, int size);
  32 static coord_t *coord_copy(coord_t c);
  33 static coord_t *coord_pass(void);
  34 static coord_t *coord_resign(void);
  35 static void coord_done(coord_t *c);
  36 int coord_edge_distance(coord_t c, struct board *b);
  37
  38 struct board;
  39 char *coord2str(coord_t c, struct board *b);
  40 char *coord2sstr(coord_t c, struct board *b);
  41 coord_t *str2coord(char *str, int board_size);
  42
  43
  44 struct move {
  45         coord_t coord;
  46         enum stone color;
  47 };
  48
  49
  50
  51 static inline coord_t *
  52 coord_init(int x, int y, int size)
  53 {
  54         coord_t *c = calloc(1, sizeof(coord_t));
  55         *c = x + y * size;
  56         return c;
  57 }
  58
  59 static inline coord_t *
  60 coord_copy(coord_t c)
  61 {
  62         coord_t *c2 = calloc(1, sizeof(coord_t));
  63         memcpy(c2, &c, sizeof(c));
  64         return c2;
  65 }
  66
  67 static inline coord_t *
  68 coord_pass()
  69 {
  70         return coord_copy(pass);
  71 }
  72
  73 static inline coord_t *
  74 coord_resign()
  75 {
  76         return coord_copy(resign);
  77 }
  78
  79 static inline void
  80 coord_done(coord_t *c)
  81 {
  82         free(c);
  83 }
  84
  85 #endif