ownermap.c

   1 #include <assert.h>
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4
   5 #include "board.h"
   6 #include "debug.h"
   7 #include "move.h"
   8 #include "mq.h"
   9 #include "ownermap.h"
  10
  11
  12 void
  13 board_ownermap_fill(struct board_ownermap *ownermap, struct board *b)
  14 {
  15         ownermap->playouts++;
  16         foreach_point(b) {
  17                 enum stone color = board_at(b, c);
  18                 if (color == S_NONE)
  19                         color = board_get_one_point_eye(b, &c);
  20                 ownermap->map[c][color]++;
  21         } foreach_point_end;
  22 }
  23
  24 void
  25 board_ownermap_merge(int bsize2, struct board_ownermap *dst, struct board_ownermap *src)
  26 {
  27         dst->playouts += src->playouts;
  28         for (int i = 0; i < bsize2; i++)
  29                 for (int j = 0; j < S_MAX; j++)
  30                         dst->map[i][j] += src->map[i][j];
  31 }
  32
  33 enum point_judgement
  34 board_ownermap_judge_point(struct board_ownermap *ownermap, coord_t c, float thres)
  35 {
  36         assert(ownermap->map);
  37         int n = ownermap->map[c][S_NONE];
  38         int b = ownermap->map[c][S_BLACK];
  39         int w = ownermap->map[c][S_WHITE];
  40         int total = ownermap->playouts;
  41         if (n >= total * thres)
  42                 return PJ_DAME;
  43         else if (n + b >= total * thres)
  44                 return PJ_BLACK;
  45         else if (n + w >= total * thres)
  46                 return PJ_WHITE;
  47         else
  48                 return PJ_UNKNOWN;
  49 }
  50
  51 void
  52 board_ownermap_judge_group(struct board *b, struct board_ownermap *ownermap, struct group_judgement *judge)
  53 {
  54         assert(ownermap->map);
  55         assert(judge->gs);
  56         memset(judge->gs, GS_NONE, board_size2(b) * sizeof(judge->gs[0]));
  57
  58         foreach_point(b) {
  59                 enum stone color = board_at(b, c);
  60                 group_t g = group_at(b, c);
  61                 if (!g) continue;
  62
  63                 enum point_judgement pj = board_ownermap_judge_point(ownermap, c, judge->thres);
  64                 if (pj == PJ_UNKNOWN) {
  65                         /* Fate is uncertain. */
  66                         judge->gs[g] = GS_UNKNOWN;
  67
  68                 } else if (judge->gs[g] != GS_UNKNOWN) {
  69                         /* Update group state. */
  70                         enum gj_state new;
  71                         if (pj == color) {
  72                                 new = GS_ALIVE;
  73                         } else if (pj == stone_other(color)) {
  74                                 new = GS_DEAD;
  75                         } else { assert(pj == PJ_DAME);
  76                                 /* Exotic! */
  77                                 new = GS_UNKNOWN;
  78                         }
  79
  80                         if (judge->gs[g] == GS_NONE) {
  81                                 judge->gs[g] = new;
  82                         } else if (judge->gs[g] != new) {
  83                                 /* Contradiction. :( */
  84                                 judge->gs[g] = GS_UNKNOWN;
  85                         }
  86                 }
  87         } foreach_point_end;
  88 }
  89
  90 void
  91 groups_of_status(struct board *b, struct group_judgement *judge, enum gj_state s, struct move_queue *mq)
  92 {
  93         foreach_point(b) { /* foreach_group, effectively */
  94                 group_t g = group_at(b, c);
  95                 if (!g || g != c) continue;
  96
  97                 assert(judge->gs[g] != GS_NONE);
  98                 if (judge->gs[g] == s)
  99                         mq_add(mq, g);
 100         } foreach_point_end;
 101 }