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- #include "comment.header"
-
- /* $Id: findnext.c,v 1.3 1997/07/06 19:34:55 ergo Exp $ */
-
- /*
- * $Log: findnext.c,v $
- * Revision 1.3 1997/07/06 19:34:55 ergo
- * actual version
- *
- * Revision 1.2 1997/05/04 18:57:00 ergo
- * added time control for moves
- *
- */
-
- #define EMPTY 0
-
- extern unsigned char p[19][19], ma[19][19];
- extern int currentStone, MAXX, MAXY;
- extern int lib;
- extern countlib(int,int,int);
-
- int fval(int newlib, int minlib)
- /* evaluate new move */
- {
- int k, val;
-
- if (newlib <= minlib)
- val = -1;
- else
- {
- k = newlib - minlib;
- val = 40 + (k - 1) * 50 / (minlib * minlib * minlib);
- }
- return val;
- } /* end fval */
-
-
- int findnextmove(int m, int n, int *i, int *j, int *val, int minlib)
- /* find new move i, j from group containing m, n */
- {
- int ti, tj, tval;
- int found = 0;
-
- *i = -1; *j = -1; *val = -1;
- /* mark current position */
- ma[m][n] = 1;
-
- /* check North neighbor */
- if (m != 0)
- if (p[m - 1][n] == EMPTY)
- {
- ti = m - 1;
- tj = n;
- lib = 0;
- countlib(ti, tj, currentStone);
- tval = fval(lib, minlib);
- found = 1;
- }
- else
- if ((p[m - 1][n] == currentStone) && !ma[m - 1][n])
- if (findnextmove(m - 1, n, &ti, &tj, &tval, minlib))
- found = 1;
-
- if (found)
- {
- found = 0;
- if (tval > *val)
- {
- *val = tval;
- *i = ti;
- *j = tj;
- }
- if (minlib == 1) return 1;
- }
-
- /* check South neighbor */
- if (m != MAXY - 1)
- if (p[m + 1][n] == EMPTY)
- {
- ti = m + 1;
- tj = n;
- lib = 0;
- countlib(ti, tj, currentStone);
- tval = fval(lib, minlib);
- found = 1;
- }
- else
- if ((p[m + 1][n] == currentStone) && !ma[m + 1][n])
- if (findnextmove(m + 1, n, &ti, &tj, &tval, minlib))
- found = 1;
-
- if (found)
- {
- found = 0;
- if (tval > *val)
- {
- *val = tval;
- *i = ti;
- *j = tj;
- }
- if (minlib == 1) return 1;
- }
-
- /* check West neighbor */
- if (n != 0)
- if (p[m][n - 1] == EMPTY)
- {
- ti = m;
- tj = n - 1;
- lib = 0;
- countlib(ti, tj, currentStone);
- tval = fval(lib, minlib);
- found = 1;
- }
- else
- if ((p[m][n - 1] == currentStone) && !ma[m][n - 1])
- if (findnextmove(m, n - 1, &ti, &tj, &tval, minlib))
- found = 1;
-
- if (found)
- {
- found = 0;
- if (tval > *val)
- {
- *val = tval;
- *i = ti;
- *j = tj;
- }
- if (minlib == 1) return 1;
- }
-
- /* check East neighbor */
- if (n != MAXX - 1)
- if (p[m][n + 1] == EMPTY)
- {
- ti = m;
- tj = n + 1;
- lib = 0;
- countlib(ti, tj, currentStone);
- tval = fval(lib, minlib);
- found = 1;
- }
- else
- if ((p[m][n + 1] == currentStone) && !ma[m][n + 1])
- if (findnextmove(m, n + 1, &ti, &tj, &tval, minlib))
- found = 1;
-
- if (found)
- {
- found = 0;
- if (tval > *val)
- {
- *val = tval;
- *i = ti;
- *j = tj;
- }
- if (minlib == 1) return 1;
- }
-
- if (*val > 0) /* found next move */
- return 1;
- else /* next move failed */
- return 0;
- } /* end findnextmove */
-
-