stone.h

   1 #ifndef ZZGO_STONE_H
   2 #define ZZGO_STONE_H
   3
   4 enum stone {
   5         S_NONE,
   6         S_BLACK,
   7         S_WHITE,
   8         S_OFFBOARD,
   9         S_MAX,
  10 };
  11
  12 static char stone2char(enum stone s);
  13 char *stone2str(enum stone s); /* static string */
  14 enum stone str2stone(char *str);
  15
  16 static enum stone stone_other(enum stone s);
  17
  18
  19 static inline char
  20 stone2char(enum stone s)
  21 {
  22         return ".XO#"[s];
  23 }
  24
  25 /* Curiously, gcc is reluctant to inline this; I have cofirmed
  26  * there is performance benefit. */
  27 static inline enum stone __attribute__((always_inline))
  28 stone_other(enum stone s)
  29 {
  30         static const enum stone o[S_MAX] = { S_NONE, S_WHITE, S_BLACK, S_OFFBOARD };
  31         return o[s];
  32 }
  33
  34 #endif