/*
Copyright (c) 1998-2015, Enno Rehling <enno@eressea.de>
Katja Zedel <katze@felidae.kn-bremen.de
Christian Schlittchen <corwin@amber.kn-bremen.de>

Permission to use, copy, modify, and/or distribute this software for any
purpose with or without fee is hereby granted, provided that the above
copyright notice and this permission notice appear in all copies.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
**/

#ifndef ALLY_H
#define ALLY_H

#ifdef __cplusplus
extern "C" {
#endif

    struct attrib_type;
    struct plane;
    struct faction;
    struct gamedata;
    struct unit;

    extern struct attrib_type at_npcfaction;

    typedef struct ally {
        struct ally *next;
        struct faction *faction;
        int status;
    } ally;

    void read_allies(struct gamedata * data, struct faction *f);
    ally * ally_find(ally *al, const struct faction *f);
    ally * ally_add(ally **al_p, struct faction *f);
    void ally_remove(ally **al_p, struct faction *f);

    int AllianceAuto(void);        /* flags that allied factions get automatically */
    int HelpMask(void);    /* flags restricted to allied factions */
    int alliedunit(const struct unit *u, const struct faction *f2,
        int mode);
    int alliedfaction(const struct plane *pl, const struct faction *f,
        const struct faction *f2, int mode);
    int alliedgroup(const struct plane *pl, const struct faction *f,
        const struct faction *f2, const struct ally *sf, int mode);

#ifdef __cplusplus
}
#endif

#endif