-#define PLN_ATTDEF(b, t) (b + ((b?1:0) * ((t/20)>10?10:(t/20))))
-#define PLN_ACC(b, t) (b * (1.0 - (sqrt(t) / 50.)))
-#define PLN_RAN(b, t) (t ? (b + (logx(t, 2.0))) : b)
-#define PLN_LOAD(b, t) (t ? (b * (logx(t, 50.0) < 1.0 ? 1.0 : \
- logx(t, 50.0))) : b)
-
-/* Work required for building 100% */
-#define PLN_BLD_WORK(lcm, hcm) (20 + (lcm) + 2 * (hcm))
+extern int pl_att(struct plchrstr *, int);
+extern int pl_def(struct plchrstr *, int);
+extern int pl_acc(struct plchrstr *, int);
+extern int pl_range(struct plchrstr *, int);
+extern int pl_load(struct plchrstr *, int);
+extern int pln_att(struct plnstr *);
+extern int pln_def(struct plnstr *);
+extern int pln_acc(struct plnstr *);
+extern int pln_range_max(struct plnstr *);
+extern int pln_load(struct plnstr *);
+
+/* src/lib/common/cargo.c */
+extern void pln_carrier_change(struct plnstr *, int, int, int);
+extern int pln_first_on_ship(struct shpstr *);
+extern int pln_first_on_land(struct lndstr *);
+extern int pln_next_on_unit(int);