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