File: citizens.h

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/*****************************************************************************
 Freeciv - Copyright (C) 1996 - A Kjeldberg, L Gregersen, P Unold
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
*****************************************************************************/
#ifndef FC__CITIZENS_H
#define FC__CITIZENS_H

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

/* utility */
#include "shared.h" /* bool */

/* common */
#include "fc_types.h"

struct player_slot;
struct city;

void citizens_init(struct city *pcity);
void citizens_free(struct city *pcity);

citizens citizens_nation_get(const struct city *pcity,
                             const struct player_slot *pslot);
citizens citizens_nation_foreign(const struct city *pcity);
void citizens_nation_set(struct city *pcity, const struct player_slot *pslot,
                         citizens count);
void citizens_nation_add(struct city *pcity, const struct player_slot *pslot,
                         int add);
void citizens_nation_move(struct city *pcity,
                          const struct player_slot *pslot_from,
                          const struct player_slot *pslot_to,
                          int move);

citizens citizens_count(const struct city *pcity);
struct player_slot *citizens_random(const struct city *pcity);

/* Iterates over all player slots (nationalities) with citizens. */
#define citizens_iterate(_pcity, _pslot, _nationality)                       \
  player_slots_iterate(_pslot) {                                             \
    citizens _nationality = citizens_nation_get(_pcity, _pslot);             \
    if (_nationality == 0) {                                                 \
      continue;                                                              \
    }
#define citizens_iterate_end                                                 \
  } player_slots_iterate_end;

/* Like above but only foreign citizens. */
#define citizens_foreign_iterate(_pcity, _pslot, _nationality)               \
  citizens_iterate(_pcity, _pslot, _nationality) {                           \
    if (_pslot == city_owner(_pcity)->slot) {                                \
      continue;                                                              \
    }
#define citizens_foreign_iterate_end                                         \
  } citizens_iterate_end;

#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif /* FC__CITIZENS_H */