bb migration: add util, update fen/fen-test + partial pos + piece

test/fen-test.c

@@ -1,20 +1,22 @@
 #include "debug.h"
 #include "pool.h"
+
 #include "../src/position.h"
 #include "../src/fen.h"
 
 int main(int ac, char**av)
 {
-    pos_t *pos;
+    position *pos;
+
 
     debug_init(5, stderr, true);
-    piece_pool_init();
     pos_pool_init();
-    pos = pos_get();
+    pos = pos_new();
     if (ac == 1) {
-        pos_startpos(pos);
+        startpos(pos);
     } else {
         fen2pos(pos, av[1]);
     }
     pos_print(pos);
+    printf("fen=[%s]\n", pos2fen(pos, NULL));
 }