dfhack/plugins/zone.cpp

// Intention: help with activity zone management (auto-pasture animals, auto-pit goblins, ...)
//
// the following things would be nice:
// - dump info about pastures, pastured animals, count non-pastured tame animals, print gender info
// - help finding caged dwarves? (maybe even allow to build their cages for fast release)
// - dump info about caged goblins, animals, ...
// - count grass tiles on pastures, move grazers to new pasture if old pasture is empty
//   move hungry unpastured grazers to pasture with grass
//
// What is working so far:
// - print detailed info about activity zone and units under cursor (mostly for checking refs and stuff)
// - mark a zone which is used for future assignment commands
// - assign single selected creature to a zone
// - mass-assign creatures using filters
// - unassign single creature under cursor from current zone
// - pitting own dwarves :)
// - full automation of handling mini-pastures over nestboxes:
//   go through all pens, check if they are empty and placed over a nestbox
//   find female tame egg-layer who is not assigned to another pen and assign it to nestbox pasture
//   maybe check for minimum age? it's not that useful to fill nestboxes with freshly hatched birds
//   state and sleep setting is saved the first time autonestbox is started (to avoid writing stuff if the plugin is never used)
// - full automation of marking live-stock for slaughtering
//   races can be added to a watchlist and it can be set how many male/female kids/adults are left alive
//   adding to the watchlist can be automated as well.
//   config for autobutcher (state and sleep setting) is saved the first time autobutcher is started
//   config for watchlist entries is saved when they are created or modified

#include <iostream>
#include <iomanip>
#include <climits>
#include <vector>
#include <algorithm>
#include <unordered_map>
#include <unordered_set>
#include <functional>
#include <string>
#include <sstream>
#include <stdexcept>
#include <ctime>
#include <cstdio>
#include <cstdint>

#include "Core.h"
#include "Console.h"
#include "Export.h"
#include "PluginManager.h"
#include "MiscUtils.h"
#include "uicommon.h"

#include "LuaTools.h"
#include "DataFuncs.h"

#include "modules/Units.h"
#include "modules/Maps.h"
#include "modules/Gui.h"
#include "modules/Materials.h"
#include "modules/MapCache.h"
#include "modules/Buildings.h"
#include "modules/World.h"
#include "modules/Screen.h"
#include "MiscUtils.h"
#include <VTableInterpose.h>

#include "df/ui.h"
#include "df/world.h"
#include "df/world_raws.h"
#include "df/building_def.h"
#include "df/building_civzonest.h"
#include "df/building_cagest.h"
#include "df/building_chainst.h"
#include "df/building_nest_boxst.h"
#include "df/general_ref_building_civzone_assignedst.h"
#include <df/creature_raw.h>
#include <df/caste_raw.h>
#include "df/unit_relationship_type.h"
#include "df/unit_soul.h"
#include "df/unit_wound.h"
#include "df/viewscreen_dwarfmodest.h"
#include "modules/Translation.h"

using std::make_pair;
using std::string;
using std::unordered_map;
using std::unordered_set;
using std::vector;

using namespace DFHack;
using namespace DFHack::Units;
using namespace DFHack::Buildings;
using namespace df::enums;

DFHACK_PLUGIN("zone");
DFHACK_PLUGIN_IS_ENABLED(is_enabled);

REQUIRE_GLOBAL(world);
REQUIRE_GLOBAL(cursor);
REQUIRE_GLOBAL(ui);
REQUIRE_GLOBAL(ui_build_selector);
REQUIRE_GLOBAL(gps);
REQUIRE_GLOBAL(cur_year);
REQUIRE_GLOBAL(cur_year_tick);

REQUIRE_GLOBAL(ui_building_item_cursor);
REQUIRE_GLOBAL(ui_building_assign_type);
REQUIRE_GLOBAL(ui_building_assign_is_marked);
REQUIRE_GLOBAL(ui_building_assign_units);
REQUIRE_GLOBAL(ui_building_assign_items);
REQUIRE_GLOBAL(ui_building_in_assign);

REQUIRE_GLOBAL(ui_menu_width);

using namespace DFHack::Gui;

command_result df_zone (color_ostream &out, vector <string> & parameters);
command_result df_autonestbox (color_ostream &out, vector <string> & parameters);
command_result df_autobutcher(color_ostream &out, vector <string> & parameters);

DFhackCExport command_result plugin_enable ( color_ostream &out, bool enable);

const string zone_help =
    "Allows easier management of pens/pastures, pits and cages.\n"
    "Commands:\n"
    "  help         - print this help message\n"
    "  filters      - print list of supported filters\n"
    "  examples     - print some usage examples\n"
    "  set          - set zone under cursor as default for future assigns\n"
    "  assign       - assign creature(s) to a pen or pit\n"
    "                 if no filters are used, a single unit must be selected.\n"
    "                 can be followed by valid building id which will then be set.\n"
    "                 building must be a pen/pasture, pit or cage.\n"
    "  slaughter    - mark creature(s) for slaughter\n"
    "                 if no filters are used, a single unit must be selected.\n"
    "                 with filters named units are ignored unless specified.\n"
    "  unassign     - unassign selected creature(s) from zone or cage\n"
    "  nick         - give unit(s) nicknames (e.g. all units in a cage)\n"
    "  enumnick     - give unit(s) enumerated nicknames (e.g Hen 1, Hen 2)\n"
    "  remnick      - remove nicknames\n"
    "  tocages      - assign to (multiple) built cages inside a pen/pasture\n"
    "                 spreads creatures evenly among cages for faster hauling.\n"
    "  uinfo        - print info about selected units\n"
    "  zinfo        - print info about zone(s) under cursor\n"
    "Options:\n"
    "  verbose      - print some more info, mostly useless debug stuff\n"
    ;

const string zone_help_filters =
    "Filters (to be used in combination with 'all' or 'count'):\n"
    "Required (one of):\n"
    "  all          - process all units\n"
    "                 should be used in combination with further filters\n"
    "  count        - must be followed by number. process X units\n"
    "                 should be used in combination with further filters\n"
    "Others (may be used with 'not' prefix):\n"
    "  age          - exact age. must be followed by number\n"
    "  caged        - in a built cage\n"
    "  egglayer     - race lays eggs (use together with 'female')\n"
    "  female       - obvious\n"
    "  grazer       - is a grazer\n"
    "  male         - obvious\n"
    "  maxage       - maximum age. must be followed by number\n"
    "  merchant     - is a merchant / belongs to a merchant\n"
    "                 can be used to pit merchants and slaughter their animals\n"
    "                 (could have weird effects during trading, be careful)\n"
    "                 ('not merchant' is set by default)\n"
    "  milkable     - race is milkable (use together with 'female')\n"
    "  minage       - minimum age. must be followed by number\n"
    "  named        - has name or nickname\n"
    "                 ('not named' is set by default when using the 'slaughter' command)\n"
    "  own          - from own civilization\n"
    "  race         - must be followed by a race raw id (e.g. BIRD_TURKEY)\n"
    "  tame         - tamed\n"
    "  trainablehunt- can be trained for hunting (and is not already trained)\n"
    "  trainablewar - can be trained for war (and is not already trained)\n"
    "  trained      - obvious\n"
    "  unassigned   - not assigned to zone, chain or built cage\n"
    "  war          - trained war creature\n"
    ;

const string zone_help_examples =
    "Example for assigning single units:\n"
    "  (ingame) move cursor to a pen/pasture or pit zone\n"
    "  (dfhack) 'zone set' to use this zone for future assignments\n"
    "  (dfhack) map 'zone assign' to a hotkey of your choice\n"
    "  (ingame) select unit with 'v', 'k' or from unit list or inside a cage\n"
    "  (ingame) press hotkey to assign unit to it's new home (or pit)\n"
    "Examples for assigning with filters:\n"
    "  (this assumes you have already set up a target zone)\n"
    "  zone assign all own grazer maxage 10\n"
    "  zone assign all own milkable not grazer\n"
    "  zone assign count 5 own female milkable\n"
    "  zone assign all own race DWARF maxage 2\n"
    "    throw all useless kids into a pit :)\n"
    "Notes:\n"
    "  Unassigning per filters ignores built cages and chains currently. Usually you\n"
    "  should always use the filter 'own' (which implies tame) unless you want to\n"
    "  use the zone tool for pitting hostiles. 'own' ignores own dwarves unless you\n"
    "  specify 'race DWARF' and it ignores merchants and their animals unless you\n"
    "  specify 'merchant' (so it's safe to use 'assign all own' to one big pasture\n"
    "  if you want to have all your animals at the same place).\n"
    "  'egglayer' and 'milkable' should be used together with 'female'\n"
    "  well, unless you have a mod with egg-laying male elves who give milk...\n";


const string autonestbox_help =
    "Assigns unpastured female egg-layers to nestbox zones.\n"
    "Requires that you create pen/pasture zones above nestboxes.\n"
    "If the pen is bigger than 1x1 the nestbox must be in the top left corner.\n"
    "Only 1 unit will be assigned per pen, regardless of the size.\n"
    "The age of the units is currently not checked, most birds grow up quite fast.\n"
    "When called without options autonestbox will instantly run once.\n"
    "Options:\n"
    "  start        - run every X frames (df simulation ticks)\n"
    "                 default: X=6000  (~60 seconds at 100fps)\n"
    "  stop         - stop running automatically\n"
    "  sleep X      - change timer to sleep X frames between runs.\n";

const string autobutcher_help =
    "Assigns your lifestock for slaughter once it reaches a specific count. Requires\n"
    "that you add the target race(s) to a watch list. Only tame units will be\n"
    "processed. Named units will be completely ignored (you can give animals\n"
    "nicknames with the tool 'rename unit' to protect them from getting slaughtered\n"
    "automatically. Trained war or hunting pets will be ignored.\n"
    "Once you have too much adults, the oldest will be butchered first.\n"
    "Once you have too much kids, the youngest will be butchered first.\n"
    "If you don't set a target count the following default will be used:\n"
    "1 male kid, 5 female kids, 1 male adult, 5 female adults.\n"
    "Options:\n"
    "  start        - run every X frames (df simulation ticks)\n"
    "                 default: X=6000  (~60 seconds at 100fps)\n"
    "  stop         - stop running automatically\n"
    "  sleep X      - change timer to sleep X frames between runs.\n"
    "  watch R      - start watching race(s)\n"
    "                 R = valid race RAW id (ALPACA, BIRD_TURKEY, etc)\n"
    "                 or a list of RAW ids seperated by spaces\n"
    "                 or the keyword 'all' which affects your whole current watchlist.\n"
    "  unwatch R    - stop watching race(s)\n"
    "                 the current target settings will be remembered\n"
    "  forget R     - unwatch race(s) and forget target settings for it/them\n"
    "  autowatch    - automatically adds all new races (animals you buy\n"
    "                 from merchants, tame yourself or get from migrants)\n"
    "                 to the watch list using default target count\n"
    "  noautowatch  - stop auto-adding new races to the watch list\n"
    "  list         - print status and watchlist\n"
    "  list_export  - print status and watchlist in batchfile format\n"
    "                 can be used to copy settings into another savegame\n"
    "                 usage: 'dfhack-run autobutcher list_export > xyz.bat' \n"
    "  target fk mk fa ma R\n"
    "               - set target count for specified race:\n"
    "                 fk = number of female kids\n"
    "                 mk = number of male kids\n"
    "                 fa = number of female adults\n"
    "                 ma = number of female adults\n"
    "                 R = 'all' sets count for all races on the current watchlist\n"
    "                 including the races which are currenly set to 'unwatched'\n"
    "                 and sets the new default for future watch commands\n"
    "                 R = 'new' sets the new default for future watch commands\n"
    "                 without changing your current watchlist\n"
    "  example      - print some usage examples\n";

const string autobutcher_help_example =
    "Examples:\n"
    "  autobutcher target 4 3 2 1 ALPACA BIRD_TURKEY\n"
    "  autobutcher watch ALPACA BIRD_TURKEY\n"
    "  autobutcher start\n"
    "    This means you want to have max 7 kids (4 female, 3 male) and max 3 adults\n"
    "    (2 female, 1 male) of the races alpaca and turkey. Once the kids grow up the\n"
    "    oldest adults will get slaughtered. Excess kids will get slaughtered starting\n"
    "    the the youngest to allow that the older ones grow into adults.\n"
    "  autobutcher target 0 0 0 0 new\n"
    "  autobutcher autowatch\n"
    "  autobutcher start\n"
    "    This tells autobutcher to automatically put all new races onto the watchlist\n"
    "    and mark unnamed tame units for slaughter as soon as they arrive in your\n"
    "    fortress. Settings already made for some races will be left untouched.\n";

command_result init_autobutcher(color_ostream &out);
command_result cleanup_autobutcher(color_ostream &out);
command_result start_autobutcher(color_ostream &out);

command_result init_autonestbox(color_ostream &out);
command_result cleanup_autonestbox(color_ostream &out);
command_result start_autonestbox(color_ostream &out);


///////////////
// stuff for autonestbox and autobutcher
// should be moved to own plugin once the tool methods it shares with the zone plugin are moved to Unit.h / Building.h

command_result autoNestbox( color_ostream &out, bool verbose );
command_result autoButcher( color_ostream &out, bool verbose );

static bool enable_autonestbox = false;
static bool enable_autobutcher = false;
static bool enable_autobutcher_autowatch = false;
static size_t sleep_autonestbox = 6000;
static size_t sleep_autobutcher = 6000;
static bool autonestbox_did_complain = false; // avoids message spam

static PersistentDataItem config_autobutcher;
static PersistentDataItem config_autonestbox;

DFhackCExport command_result plugin_onstatechange(color_ostream &out, state_change_event event)
{
    switch (event)
    {
    case DFHack::SC_MAP_LOADED:
        // initialize from the world just loaded
        init_autobutcher(out);
        init_autonestbox(out);
        break;
    case DFHack::SC_MAP_UNLOADED:
        enable_autonestbox = false;
        enable_autobutcher = false;
        // cleanup
        cleanup_autobutcher(out);
        cleanup_autonestbox(out);
        break;
    default:
        break;
    }
    return CR_OK;
}

DFhackCExport command_result plugin_onupdate ( color_ostream &out )
{
    static size_t ticks_autonestbox = 0;
    static size_t ticks_autobutcher = 0;

    if(enable_autonestbox)
    {
        if(++ticks_autonestbox >= sleep_autonestbox)
        {
            ticks_autonestbox = 0;
            autoNestbox(out, false);
        }
    }

    if(enable_autobutcher)
    {
        if(++ticks_autobutcher >= sleep_autobutcher)
        {
            ticks_autobutcher= 0;
            autoButcher(out, false);
        }
    }

    return CR_OK;
}


///////////////
// Various small tool functions
// probably many of these should be moved to Unit.h and Building.h sometime later...

df::general_ref_building_civzone_assignedst * createCivzoneRef();
bool unassignUnitFromBuilding(df::unit* unit);
command_result assignUnitToZone(color_ostream& out, df::unit* unit, df::building* building, bool verbose);
void unitInfo(color_ostream & out, df::unit* creature, bool verbose);
void zoneInfo(color_ostream & out, df::building* building, bool verbose);
void cageInfo(color_ostream & out, df::building* building, bool verbose);
void chainInfo(color_ostream & out, df::building* building, bool verbose);
bool isBuiltCageAtPos(df::coord pos);
bool isInBuiltCageRoom(df::unit*);

void doMarkForSlaughter(df::unit* unit)
{
    unit->flags2.bits.slaughter = 1;
}

// found a unit with weird position values on one of my maps (negative and in the thousands)
// it didn't appear in the animal stocks screen, but looked completely fine otherwise (alive, tame, own, etc)
// maybe a rare bug, but better avoid assigning such units to zones or slaughter etc.
bool hasValidMapPos(df::unit* unit)
{
    if(    unit->pos.x >=0 && unit->pos.y >= 0 && unit->pos.z >= 0
        && unit->pos.x < world->map.x_count
        && unit->pos.y < world->map.y_count
        && unit->pos.z < world->map.z_count)
        return true;
    else
        return false;
}

// dump some unit info
void unitInfo(color_ostream & out, df::unit* unit, bool verbose = false)
{
    out.print("Unit %d ", unit->id); //race %d, civ %d,", creature->race, creature->civ_id
    if(unit->name.has_name)
    {
        // units given a nick with the rename tool might not have a first name (animals etc)
        string firstname = unit->name.first_name;
        if(firstname.size() > 0)
        {
            firstname[0] = toupper(firstname[0]);
            out << "Name: " << firstname;
        }
        if(unit->name.nickname.size() > 0)
            out << " '" << unit->name.nickname << "'";
        out << ", ";
    }

    if(isAdult(unit))
        out << "adult";
    else if(isBaby(unit))
        out << "baby";
    else if(isChild(unit))
        out << "child";
    out << " ";
    // sometimes empty even in vanilla RAWS, sometimes contains full race name (e.g. baby alpaca)
    // all animals I looked at don't have babies anyways, their offspring tarts as CHILD
    //out << getRaceBabyName(unit);
    //out << getRaceChildName(unit);

    out << getRaceName(unit) << " (";
    switch(unit->sex)
    {
    case 0:
        out << "female";
        break;
    case 1:
        out << "male";
        break;
    case -1:
    default:
        out << "n/a";
        break;
    }
    out << ")";
    out << ", age: " << getAge(unit, true);


    if(isTame(unit))
        out << ", tame";
    if(isOwnCiv(unit))
        out << ", owned";
    if(isWar(unit))
        out << ", war";
    if(isHunter(unit))
        out << ", hunter";
    if(isMerchant(unit))
        out << ", merchant";
    if(isForest(unit))
        out << ", forest";
    if(isEggLayer(unit))
        out << ", egglayer";
    if(isGrazer(unit))
        out << ", grazer";
    if(isMilkable(unit))
        out << ", milkable";
    if(unit->flags2.bits.slaughter)
        out << ", slaughter";
    
    if(verbose)
    {
        out << ". Pos: ("<<unit->pos.x << "/"<< unit->pos.y << "/" << unit->pos.z << ") " << endl;
        out << "index in units vector: " << findIndexById(unit->id) << endl;
    }
    out << endl;

    if(!verbose)
        return;

    //out << "number of refs: " << creature->general_refs.size() << endl;
    for(size_t r = 0; r<unit->general_refs.size(); r++)
    {
        df::general_ref* ref = unit->general_refs.at(r);
        df::general_ref_type refType = ref->getType();
        out << "  ref#" << r <<" refType#" << refType << " "; //endl;
        switch(refType)
        {
        case df::general_ref_type::BUILDING_CIVZONE_ASSIGNED:
            {
            out << "assigned to zone";
            df::building_civzonest * civAss = (df::building_civzonest *) ref->getBuilding();
            out << " #" << civAss->id;
            }
            break;
        case df::general_ref_type::CONTAINED_IN_ITEM:
            out << "contained in item";
            break;
        case df::general_ref_type::BUILDING_CAGED:
            out << "caged";
            break;
        case df::general_ref_type::BUILDING_CHAIN:
            out << "chained";
            break;
        default:
            //out << "unhandled reftype";
            break;
        }
        out << endl;
    }
    if(isInBuiltCageRoom(unit))
    {
        out << "in a room." << endl;
    }
}

bool isCage(df::building * building)
{
    return building && (building->getType() == building_type::Cage);
}

bool isChain(df::building * building)
{
    return building && (building->getType() == building_type::Chain);
}

df::general_ref_building_civzone_assignedst * createCivzoneRef()
{
    static bool vt_initialized = false;
    df::general_ref_building_civzone_assignedst* newref = NULL;

    // after having run successfully for the first time it's safe to simply create the object
    if(vt_initialized)
    {
        newref = (df::general_ref_building_civzone_assignedst*)
            df::general_ref_building_civzone_assignedst::_identity.instantiate();
        return newref;
    }

    // being called for the first time, need to initialize the vtable
    for(size_t i = 0; i < world->units.all.size(); i++)
    {
        df::unit * creature = world->units.all[i];
        for(size_t r = 0; r<creature->general_refs.size(); r++)
        {
            df::general_ref* ref;
            ref = creature->general_refs.at(r);
            if(ref->getType() == df::general_ref_type::BUILDING_CIVZONE_ASSIGNED)
            {
                if (strict_virtual_cast<df::general_ref_building_civzone_assignedst>(ref))
                {
                    // !! calling new() doesn't work, need _identity.instantiate() instead !!
                    newref = (df::general_ref_building_civzone_assignedst*)
                        df::general_ref_building_civzone_assignedst::_identity.instantiate();
                    vt_initialized = true;
                    break;
                }
            }
        }
        if(vt_initialized)
            break;
    }
    return newref;
}

bool isInBuiltCage(df::unit* unit);

// check if assigned to pen, pit, (built) cage or chain
// note: BUILDING_CAGED is not set for animals (maybe it's used for dwarves who get caged as sentence)
// animals in cages (no matter if built or on stockpile) get the ref CONTAINED_IN_ITEM instead
// removing them from cages on stockpiles is no problem even without clearing the ref
// and usually it will be desired behavior to do so.
bool isAssigned(df::unit* unit)
{
    bool assigned = false;
    for (size_t r=0; r < unit->general_refs.size(); r++)
    {
        df::general_ref * ref = unit->general_refs[r];
        auto rtype = ref->getType();
        if(    rtype == df::general_ref_type::BUILDING_CIVZONE_ASSIGNED
            || rtype == df::general_ref_type::BUILDING_CAGED
            || rtype == df::general_ref_type::BUILDING_CHAIN
            || (rtype == df::general_ref_type::CONTAINED_IN_ITEM && isInBuiltCage(unit))
            )
        {
            assigned = true;
            break;
        }
    }
    return assigned;
}

bool isAssignedToZone(df::unit* unit)
{
    bool assigned = false;
    for (size_t r=0; r < unit->general_refs.size(); r++)
    {
        df::general_ref * ref = unit->general_refs[r];
        auto rtype = ref->getType();
        if(rtype == df::general_ref_type::BUILDING_CIVZONE_ASSIGNED)
        {
            assigned = true;
            break;
        }
    }
    return assigned;
}

// check if assigned to a chain or built cage
// (need to check if the ref needs to be removed, until then touching them is forbidden)
bool isChained(df::unit* unit)
{
    bool contained = false;
    for (size_t r=0; r < unit->general_refs.size(); r++)
    {
        df::general_ref * ref = unit->general_refs[r];
        auto rtype = ref->getType();
        if(rtype == df::general_ref_type::BUILDING_CHAIN)
        {
            contained = true;
            break;
        }
    }
    return contained;
}

// check if contained in item (e.g. animals in cages)
bool isContainedInItem(df::unit* unit)
{
    bool contained = false;
    for (size_t r=0; r < unit->general_refs.size(); r++)
    {
        df::general_ref * ref = unit->general_refs[r];
        auto rtype = ref->getType();
        if(rtype == df::general_ref_type::CONTAINED_IN_ITEM)
        {
            contained = true;
            break;
        }
    }
    return contained;
}

bool isInBuiltCage(df::unit* unit)
{
    bool caged = false;
    for (size_t b=0; b < world->buildings.all.size(); b++)
    {
        df::building* building = world->buildings.all[b];
        if( building->getType() == building_type::Cage)
        {
            df::building_cagest* cage = (df::building_cagest*) building;
            for(size_t c=0; c<cage->assigned_units.size(); c++)
            {
                if(cage->assigned_units[c] == unit->id)
                {
                    caged = true;
                    break;
                }
            }
        }
        if(caged)
            break;
    }
    return caged;
}

// built cage defined as room (supposed to detect zoo cages)
bool isInBuiltCageRoom(df::unit* unit)
{
    bool caged_room = false;
    for (size_t b=0; b < world->buildings.all.size(); b++)
    {
        df::building* building = world->buildings.all[b];

        // !!! building->isRoom() returns true if the building can be made a room but currently isn't
        // !!! except for coffins/tombs which always return false
        // !!! using the bool is_room however gives the correct state/value
        if(!building->is_room)
            continue;

        if(building->getType() == building_type::Cage)
        {
            df::building_cagest* cage = (df::building_cagest*) building;
            for(size_t c=0; c<cage->assigned_units.size(); c++)
            {
                if(cage->assigned_units[c] == unit->id)
                {
                    caged_room = true;
                    break;
                }
            }
        }
        if(caged_room)
            break;
    }
    return caged_room;
}

// check a map position for a built cage
// animals in cages are CONTAINED_IN_ITEM, no matter if they are on a stockpile or inside a built cage
// if they are on animal stockpiles they should count as unassigned to allow pasturing them
// if they are inside built cages they should be ignored in case the cage is a zoo or linked to a lever or whatever
bool isBuiltCageAtPos(df::coord pos)
{
    bool cage = false;
    for (size_t b=0; b < world->buildings.all.size(); b++)
    {
        df::building* building = world->buildings.all[b];
        if( building->getType() == building_type::Cage
            && building->x1 == pos.x
            && building->y1 == pos.y
            && building->z  == pos.z )
        {
            cage = true;
            break;
        }
    }
    return cage;
}

df::building * getBuiltCageAtPos(df::coord pos)
{
    df::building* cage = NULL;
    for (size_t b=0; b < world->buildings.all.size(); b++)
    {
        df::building* building = world->buildings.all[b];
        if( building->getType() == building_type::Cage
            && building->x1 == pos.x
            && building->y1 == pos.y
            && building->z  == pos.z )
        {
            // don't set pointer if not constructed yet
            if(building->getBuildStage()!=building->getMaxBuildStage())
                break;

            cage = building;
            break;
        }
    }
    return cage;
}

bool isNestboxAtPos(int32_t x, int32_t y, int32_t z)
{
    bool found = false;
    for (size_t b=0; b < world->buildings.all.size(); b++)
    {
        df::building* building = world->buildings.all[b];
        if( building->getType() == building_type::NestBox
            && building->x1 == x
            && building->y1 == y
            && building->z  == z )
        {
            found = true;
            break;
        }
    }
    return found;
}

bool isFreeNestboxAtPos(int32_t x, int32_t y, int32_t z)
{
    bool found = false;
    for (size_t b=0; b < world->buildings.all.size(); b++)
    {
        df::building* building = world->buildings.all[b];
        if( building->getType() == building_type::NestBox
            && building->x1 == x
            && building->y1 == y
            && building->z  == z )
        {
            df::building_nest_boxst* nestbox = (df::building_nest_boxst*) building;
            if(nestbox->claimed_by == -1 && nestbox->contained_items.size() == 1)
            {
                found = true;
                break;
            }
        }
    }
    return found;
}

bool isEmptyPasture(df::building* building)
{
    if(!isPenPasture(building))
        return false;
    df::building_civzonest * civ = (df::building_civzonest *) building;
    if(civ->assigned_units.size() == 0)
        return true;
    else
        return false;
}

df::building* findFreeNestboxZone()
{
    df::building * free_building = NULL;
    for (size_t b=0; b < world->buildings.all.size(); b++)
    {
        df::building* building = world->buildings.all[b];
        if( isEmptyPasture(building) &&
            isActive(building) &&
            isFreeNestboxAtPos(building->x1, building->y1, building->z))
        {
            free_building = building;
            break;
        }
    }
    return free_building;
}

bool isFreeEgglayer(df::unit * unit)
{
    return isActive(unit) && !isUndead(unit)
        && isFemale(unit)
        && isTame(unit)
        && isOwnCiv(unit)
        && isEggLayer(unit)
        && !isAssigned(unit)
        && !isGrazer(unit) // exclude grazing birds because they're messy
        && !isMerchant(unit) // don't steal merchant mounts
        && !isForest(unit);  // don't steal birds from traders, they hate that
}

df::unit * findFreeEgglayer()
{
    df::unit* free_unit = NULL;
    for (size_t i=0; i < world->units.all.size(); i++)
    {
        df::unit* unit = world->units.all[i];
        if(isFreeEgglayer(unit))
        {
            free_unit = unit;
            break;
        }
    }
    return free_unit;
}

size_t countFreeEgglayers()
{
    size_t count = 0;
    for (size_t i=0; i < world->units.all.size(); i++)
    {
        df::unit* unit = world->units.all[i];
        if(isFreeEgglayer(unit))
            count ++;
    }
    return count;
}

// check if unit is already assigned to a zone, remove that ref from unit and old zone
// check if unit is already assigned to a cage, remove that ref from the cage
// returns false if no cage or pasture information was found
// helps as workaround for http://www.bay12games.com/dwarves/mantisbt/view.php?id=4475 by the way
// (pastured animals assigned to chains will get hauled back and forth because the pasture ref is not deleted)
bool unassignUnitFromBuilding(df::unit* unit)
{
    bool success = false;
    for (std::size_t idx = 0; idx < unit->general_refs.size(); idx++)
    {
        df::general_ref * oldref = unit->general_refs[idx];
        switch(oldref->getType())
        {
        case df::general_ref_type::BUILDING_CIVZONE_ASSIGNED:
            {
                unit->general_refs.erase(unit->general_refs.begin() + idx);
                df::building_civzonest * oldciv = (df::building_civzonest *) oldref->getBuilding();
                for(size_t oc=0; oc<oldciv->assigned_units.size(); oc++)
                {
                    if(oldciv->assigned_units[oc] == unit->id)
                    {
                        oldciv->assigned_units.erase(oldciv->assigned_units.begin() + oc);
                        break;
                    }
                }
                delete oldref;
                success = true;
                break;
            }

        case df::general_ref_type::CONTAINED_IN_ITEM:
            {
                // game does not erase the ref until creature gets removed from cage
                //unit->general_refs.erase(unit->general_refs.begin() + idx);

                // walk through buildings, check cages for inhabitants, compare ids
                for (size_t b=0; b < world->buildings.all.size(); b++)
                {
                    bool found = false;
                    df::building* building = world->buildings.all[b];
                    if(isCage(building))
                    {
                        df::building_cagest* oldcage = (df::building_cagest*) building;
                        for(size_t oc=0; oc<oldcage->assigned_units.size(); oc++)
                        {
                            if(oldcage->assigned_units[oc] == unit->id)
                            {
                                oldcage->assigned_units.erase(oldcage->assigned_units.begin() + oc);
                                found = true;
                                break;
                            }
                        }
                    }
                    if(found)
                        break;
                }
                success = true;
                break;
            }

        case df::general_ref_type::BUILDING_CHAIN:
            {
                // try not erasing the ref and see what happens
                //unit->general_refs.erase(unit->general_refs.begin() + idx);
                // probably need to delete chain reference here
                //success = true;
                break;
            }

        case df::general_ref_type::BUILDING_CAGED:
            {
                // not sure what to do here, doesn't seem to get used by the game
                //unit->general_refs.erase(unit->general_refs.begin() + idx);
                //success = true;
                break;
            }

        default:
            {
                // some reference which probably shouldn't get deleted
                // (animals who are historical figures and have a NEMESIS reference or whatever)
                break;
            }
        }
    }
    return success;
}

// assign to pen or pit
command_result assignUnitToZone(color_ostream& out, df::unit* unit, df::building* building, bool verbose = false)
{
    // building must be a pen/pasture or pit
    if(!isPenPasture(building) && !isPitPond(building))
    {
        out << "Invalid building type. This is not a pen/pasture or pit/pond." << endl;
        return CR_WRONG_USAGE;
    }

    // try to get a fresh civzone ref
    df::general_ref_building_civzone_assignedst * ref = createCivzoneRef();
    if(!ref)
    {
        out << "Could not find a clonable activity zone reference" << endl
            << "You need to pen/pasture/pit at least one creature" << endl
            << "before using 'assign' for the first time." << endl;
        return CR_WRONG_USAGE;
    }

    // check if unit is already pastured, remove that ref from unit and old pasture
    //    testing showed that removing the ref from the unit only seems to be necessary for pastured creatures
    //    if they are in cages on stockpiles the game unassigns them automatically
    //    if they are in built cages the pointer to the creature needs to be removed from the cage
    //    TODO: check what needs to be done for chains
    bool cleared_old = unassignUnitFromBuilding(unit);

    if(verbose)
    {
        if(cleared_old)
            out << "old zone info cleared.";
        else
            out << "no old zone info found.";
    }

    ref->building_id = building->id;
    unit->general_refs.push_back(ref);

    df::building_civzonest * civz = (df::building_civzonest *) building;
    civz->assigned_units.push_back(unit->id);

    out << "Unit " << unit->id
        << "(" << getRaceName(unit) << ")"
        << " assigned to zone " << building->id;
    if(isPitPond(building))
        out << " (pit/pond).";
    if(isPenPasture(building))
        out << " (pen/pasture).";
    out << endl;

    return CR_OK;
}

command_result assignUnitToCage(color_ostream& out, df::unit* unit, df::building* building, bool verbose)
{
    // building must be a pen/pasture or pit
    if(!isCage(building))
    {
        out << "Invalid building type. This is not a cage." << endl;
        return CR_WRONG_USAGE;
    }

    // don't assign owned pets to a cage. the owner will release them, resulting into infinite hauling (df bug)
    if(unit->relationship_ids[df::unit_relationship_type::Pet] != -1)
        return CR_OK;

    // check if unit is already pastured or caged, remove refs where necessary
    bool cleared_old = unassignUnitFromBuilding(unit);
    if(verbose)
    {
        if(cleared_old)
            out << "old zone info cleared.";
        else
            out << "no old zone info found.";
    }

    //ref->building_id = building->id;
    //unit->general_refs.push_back(ref);

    df::building_cagest* civz = (df::building_cagest*) building;
    civz->assigned_units.push_back(unit->id);

    out << "Unit " << unit->id
        << "(" << getRaceName(unit) << ")"
        << " assigned to cage " << building->id;
    out << endl;

    return CR_OK;
}

command_result assignUnitToChain(color_ostream& out, df::unit* unit, df::building* building, bool verbose)
{
    out << "sorry. assigning to chains is not possible yet." << endl;
    return CR_WRONG_USAGE;
}

command_result assignUnitToBuilding(color_ostream& out, df::unit* unit, df::building* building, bool verbose)
{
    command_result result = CR_WRONG_USAGE;

    if(isActivityZone(building))
        result = assignUnitToZone(out, unit, building, verbose);
    else if(isCage(building))
        result = assignUnitToCage(out, unit, building, verbose);
    else if(isChain(building))
        result = assignUnitToChain(out, unit, building, verbose);
    else
        out << "Cannot assign units to this type of building!" << endl;

    return result;
}

command_result assignUnitsToCagezone(color_ostream& out, vector<df::unit*> units, df::building* building, bool verbose)
{
    if(!isPenPasture(building))
    {
        out << "A cage zone needs to be a pen/pasture containing at least one cage!" << endl;
        return CR_WRONG_USAGE;
    }

    int32_t x1 = building->x1;
    int32_t x2 = building->x2;
    int32_t y1 = building->y1;
    int32_t y2 = building->y2;
    int32_t z  = building->z;
    vector <df::building_cagest*> cages;
    for (int32_t x = x1; x<=x2; x++)
    {
        for (int32_t y = y1; y<=y2; y++)
        {
            df::building* cage = getBuiltCageAtPos(df::coord(x,y,z));
            if(cage)
            {
                df::building_cagest* cagest = (df::building_cagest*) cage;
                cages.push_back(cagest);
            }
        }
    }
    if(!cages.size())
    {
        out << "No cages found in this zone!" << endl;
        return CR_WRONG_USAGE;
    }
    else
    {
        out << "Number of cages: " << cages.size() << endl;
    }

    while(units.size())
    {
        // hrm, better use sort() instead?
        df::building_cagest * bestcage = cages[0];
        size_t lowest = cages[0]->assigned_units.size();
        for(size_t i=1; i<cages.size(); i++)
        {
            if(cages[i]->assigned_units.size()<lowest)
            {
                lowest = cages[i]->assigned_units.size();
                bestcage = cages[i];
            }
        }
        df::unit* unit = units.back();
        units.pop_back();
        command_result result = assignUnitToCage(out, unit, (df::building*) bestcage, verbose);
        if(result!=CR_OK)
            return result;
    }

    return CR_OK;
}

command_result nickUnitsInZone(color_ostream& out, df::building* building, string nick)
{
    // building must be a pen/pasture or pit
    if(!isPenPasture(building) && !isPitPond(building))
    {
        out << "Invalid building type. This is not a pen/pasture or pit/pond." << endl;
        return CR_WRONG_USAGE;
    }

    df::building_civzonest * civz = (df::building_civzonest *) building;
    for(size_t i = 0; i < civz->assigned_units.size(); i++)
    {
        df::unit* unit = df::unit::find(civz->assigned_units[i]);
        if(unit)
            Units::setNickname(unit, nick);
    }

    return CR_OK;
}

command_result nickUnitsInCage(color_ostream& out, df::building* building, string nick)
{
    // building must be a pen/pasture or pit
    if(!isCage(building))
    {
        out << "Invalid building type. This is not a cage." << endl;
        return CR_WRONG_USAGE;
    }

    df::building_cagest* cage = (df::building_cagest*) building;
    for(size_t i=0; i<cage->assigned_units.size(); i++)
    {
        df::unit* unit = df::unit::find(cage->assigned_units[i]);
        if(unit)
            Units::setNickname(unit, nick);
    }

    return CR_OK;
}

command_result nickUnitsInChain(color_ostream& out, df::building* building, string nick)
{
    out << "sorry. nicknaming chained units is not possible yet." << endl;
    return CR_WRONG_USAGE;
}

// give all units inside a pasture or cage the same nickname
// (usage example: protect them from being autobutchered)
command_result nickUnitsInBuilding(color_ostream& out, df::building* building, string nick)
{
    command_result result = CR_WRONG_USAGE;

    if(isActivityZone(building))
        result = nickUnitsInZone(out, building, nick);
    else if(isCage(building))
        result = nickUnitsInCage(out, building, nick);
    else if(isChain(building))
        result = nickUnitsInChain(out, building, nick);
    else
        out << "Cannot nickname units in this type of building!" << endl;

    return result;
}

// dump some zone info
void zoneInfo(color_ostream & out, df::building* building, bool verbose)
{
    if(!isActivityZone(building))
        return;

    string name;
    building->getName(&name);
    out.print("Building %i - \"%s\" - type %s (%i)",
                building->id,
                name.c_str(),
                ENUM_KEY_STR(building_type, building->getType()).c_str(),
                building->getType());
    out.print(", subtype %s (%i)",
                ENUM_KEY_STR(civzone_type, (df::civzone_type)building->getSubtype()).c_str(),
                building->getSubtype());
    out.print("\n");

    df::building_civzonest * civ = (df::building_civzonest *) building;
    if(isActive(civ))
        out << "active";
    else
        out << "not active";

    if(civ->zone_flags.bits.pen_pasture)
        out << ", pen/pasture";
    else if (civ->zone_flags.bits.pit_pond)
    {
        out << " (pit flags:" << civ->pit_flags.whole << ")";
        if(civ->pit_flags.bits.is_pond)
            out << ", pond";
        else
            out << ", pit";
    }
    out << endl;
    out << "x1:" <<building->x1
        << " x2:" <<building->x2
        << " y1:" <<building->y1
        << " y2:" <<building->y2
        << " z:" <<building->z
        << endl;

    size_t creaturecount = civ->assigned_units.size();
    out << "Creatures in this zone: " << creaturecount << endl;
    for(size_t c = 0; c < creaturecount; c++)
    {
        int32_t cindex = civ->assigned_units.at(c);

        // print list of all units assigned to that zone
        for(size_t i = 0; i < world->units.all.size(); i++)
        {
            df::unit * creature = world->units.all[i];
            if(creature->id != cindex)
                continue;

            unitInfo(out, creature, verbose);
        }
    }
}

// dump some cage info
void cageInfo(color_ostream & out, df::building* building, bool verbose)
{
    if(!isCage(building))
        return;

    string name;
    building->getName(&name);
    out.print("Building %i - \"%s\" - type %s (%i)",
                building->id,
                name.c_str(),
                ENUM_KEY_STR(building_type, building->getType()).c_str(),
                building->getType());
    out.print("\n");

    out << "x:"  << building->x1
        << " y:" << building->y1
        << " z:" << building->z
        << endl;

    df::building_cagest * cage = (df::building_cagest*) building;

    size_t creaturecount = cage->assigned_units.size();
    out << "Creatures in this cage: " << creaturecount << endl;
    for(size_t c = 0; c < creaturecount; c++)
    {
        int32_t cindex = cage->assigned_units.at(c);

        // print list of all units assigned to that cage
        for(size_t i = 0; i < world->units.all.size(); i++)
        {
            df::unit * creature = world->units.all[i];
            if(creature->id != cindex)
                continue;

            unitInfo(out, creature, verbose);
        }
    }
}

// dump some chain/restraint info
void chainInfo(color_ostream & out, df::building* building, bool list_refs = false)
{
    if(!isChain(building))
        return;

    string name;
    building->getName(&name);
    out.print("Building %i - \"%s\" - type %s (%i)",
                building->id,
                name.c_str(),
                ENUM_KEY_STR(building_type, building->getType()).c_str(),
                building->getType());
    out.print("\n");

    df::building_chainst* chain = (df::building_chainst*) building;
    if(chain->assigned)
    {
        out << "assigned: ";
        unitInfo(out, chain->assigned, true);
    }
    if(chain->chained)
    {
        out << "chained: ";
        unitInfo(out, chain->chained, true);
    }
}

df::building* getAssignableBuildingAtCursor(color_ostream& out)
{
    // set building at cursor position to be new target building
    if (cursor->x == -30000)
    {
        out.printerr("No cursor; place cursor over activity zone, pen,"
                " pasture, pit, pond, chain, or cage.\n");
        return NULL;
    }

    auto building_at_tile = Buildings::findAtTile(Gui::getCursorPos());

    // cagezone wants a pen/pit as starting point
    if (isCage(building_at_tile))
    {
        out << "Target building type: cage." << endl;
        return building_at_tile;
    }
    else
    {
        auto zone_at_tile = findPenPitAt(Gui::getCursorPos());
        if(!zone_at_tile)
        {
            out << "No pen/pasture, pit, or cage under cursor!" << endl;
            return NULL;
        }
        else
        {
            out << "Target building type: pen/pasture or pit." << endl;
            return zone_at_tile;
        }
    }
}

// ZONE FILTERS (as in, filters used by 'zone')

// Maps parameter names to filters.
unordered_map<string, function<bool(df::unit*)>> zone_filters;
static struct zone_filters_init { zone_filters_init() {
    zone_filters["caged"] = isContainedInItem;
    zone_filters["egglayer"] = isEggLayer;
    zone_filters["female"] = isFemale;
    zone_filters["grazer"] = isGrazer;
    zone_filters["hunting"] = isHunter;
    zone_filters["male"] = isMale;
    zone_filters["milkable"] = isMilkable;
    zone_filters["naked"] = isNaked;
    zone_filters["own"] = isOwnCiv;
    zone_filters["tamable"] = isTamable;
    zone_filters["tame"] = isTame;
    zone_filters["trainablewar"] = [](df::unit *unit) -> bool
    {
        return !isWar(unit) && !isHunter(unit) && isTrainableWar(unit);
    };
    zone_filters["trainablehunt"] = [](df::unit *unit) -> bool
    {
        return !isWar(unit) && !isHunter(unit) && isTrainableHunting(unit);
    };
    zone_filters["trained"] = isTrained;
    // backwards compatibility
    zone_filters["unassigned"] = [](df::unit *unit) -> bool
    {
        return !isAssigned(unit);
    };
    zone_filters["war"] = isWar;
}} zone_filters_init_;

// Extra annotations / descriptions for parameter names.
unordered_map<string, string> zone_filter_notes;
static struct zone_filter_notes_init { zone_filter_notes_init() {
    zone_filter_notes["caged"] = "caged (ignores built cages)";
    zone_filter_notes["hunting"] = "trained hunting creature";
    zone_filter_notes["named"] = "has name or nickname";
    zone_filter_notes["own"] = "own civilization";
    zone_filter_notes["trainablehunt"] = "trainable for hunting";
    zone_filter_notes["trainablewar"] = "trainable for war";
    zone_filter_notes["war"] = "trained war creature";
}} zone_filter_notes_init_;

pair<string, function<bool(df::unit*)>> createRaceFilter(vector<string> &filter_args)
{
    // guaranteed to exist.
    string race = filter_args[0];

    return make_pair(
        "race of " + race,
        [race](df::unit *unit) -> bool {
            return getRaceName(unit) == race;
        }
    );
}

pair<string, function<bool(df::unit*)>> createAgeFilter(vector<string> &filter_args)
{
    int target_age;
    stringstream ss(filter_args[0]);

    ss >> target_age;

    if (ss.fail()) {
        ostringstream err;
        err <<  "Invalid age: " << filter_args[0] << "; age must be a number!";
        throw runtime_error(err.str());
    }
    if (target_age < 0) {
        ostringstream err;
        err <<  "Invalid age: " << target_age << "; age must be >= 0!";
        throw runtime_error(err.str());
    }

    return make_pair(
        "age of exactly " + int_to_string(target_age),
        [target_age](df::unit *unit) -> bool {
            return getAge(unit, true) == target_age;
        }
    );
}

pair<string, function<bool(df::unit*)>> createMinAgeFilter(vector<string> &filter_args)
{
    double min_age;
    stringstream ss(filter_args[0]);

    ss >> min_age;

    if (ss.fail()) {
        ostringstream err;
        err <<  "Invalid minimum age: " << filter_args[0] << "; age must be a number!";
        throw runtime_error(err.str());
    }
    if (min_age < 0) {
        ostringstream err;
        err <<  "Invalid minimum age: " << min_age << "; age must be >= 0!";
        throw runtime_error(err.str());
    }

    return make_pair(
        "minimum age of " + int_to_string(min_age),
        [min_age](df::unit *unit) -> bool {
            return getAge(unit, true) >= min_age;
        }
    );
}

pair<string, function<bool(df::unit*)>> createMaxAgeFilter(vector<string> &filter_args)
{
    double max_age;
    stringstream ss(filter_args[0]);

    ss >> max_age;

    if (ss.fail()) {
        ostringstream err;
        err <<  "Invalid maximum age: " << filter_args[0] << "; age must be a number!";
        throw runtime_error(err.str());
    }
    if (max_age < 0) {
        ostringstream err;
        err <<  "Invalid maximum age: " << max_age << "; age must be >= 0!";
        throw runtime_error(err.str());
    }

    return make_pair(
        "maximum age of " + int_to_string(max_age),
        [max_age](df::unit *unit) -> bool {
            return getAge(unit, true) <= max_age;
        }
    );
}

// Filters that take arguments.
// Wow, what a type signature.
// Applied to their number of arguments in a vector<string>& to create a pair.
// Like:
//     int argcount = zone_param_filters[...].first;
//     function<bool(df::unit*)> filter = zone_param_filters[...].second(filter_args);
// (description, filter).
// Sort of like filter function constructors.
// Constructor functions are permitted to throw strings, which will be caught and printed.
// Result filter functions are not permitted to throw std::exceptions.
// Result filter functions should not store references
unordered_map<string, pair<int,
           function<pair<string, function<bool(df::unit*)>>(vector<string>&)>>> zone_param_filters;
static struct zone_param_filters_init { zone_param_filters_init() {
    zone_param_filters["race"] = make_pair(1, createRaceFilter);
    zone_param_filters["age"] = make_pair(1, createAgeFilter);
    zone_param_filters["minage"] = make_pair(1, createMinAgeFilter);
    zone_param_filters["maxage"] = make_pair(1, createMaxAgeFilter);
}} zone_param_filters_init_;

command_result df_zone (color_ostream &out, vector <string> & parameters)
{
    CoreSuspender suspend;

    if (!Maps::IsValid())
    {
        out.printerr("Map is not available!\n");
        return CR_FAILURE;
    }

    static df::building* target_building = NULL;

    int target_count = 0;

    bool unit_info = false;
    bool unit_slaughter = false;
    bool building_assign = false;
    bool building_unassign = false;
    bool cagezone_assign = false;
    bool nick_set = false;
    string target_nick;
    bool enum_nick = true;
    string enum_prefix;

    bool verbose = false;

    size_t start_index;

    {
        const string & p0 = parameters[0];

        if (p0 == "help" || p0 == "?")
        {
            out << zone_help << endl;
            return CR_OK;
        }
        if (p0 == "filters")
        {
            out << zone_help_filters << endl;
            return CR_OK;
        }
        if (p0 == "examples")
        {
            out << zone_help_examples << endl;
            return CR_OK;
        }
        else if(p0 == "zinfo")
        {
            if (cursor->x == -30000) {
                out.color(COLOR_RED);
                out << "No cursor; place cursor over activity zone, chain, or cage." << endl;
                out.reset_color();

                return CR_FAILURE;
            }

            // give info on zone(s), chain or cage under cursor
            // (doesn't use the findXyzAtCursor() methods because zones might
            // overlap and contain a cage or chain)
            vector<df::building_civzonest*> zones;
            Buildings::findCivzonesAt(&zones, Gui::getCursorPos());
            for (auto zone = zones.begin(); zone != zones.end(); ++zone)
                zoneInfo(out, *zone, verbose);
            df::building* building = Buildings::findAtTile(Gui::getCursorPos());
            chainInfo(out, building, verbose);
            cageInfo(out, building, verbose);
            return CR_OK;
        }
        else if(p0 == "set")
        {
            target_building = getAssignableBuildingAtCursor(out);
            if (target_building) {
                out.color(COLOR_BLUE);
                out << "Current building set to #"
                    << target_building->id << endl;
                out.reset_color();

                return CR_OK;
            } else {
                out.color(COLOR_BLUE);
                out << "Current building unset (no building under"
                    "cursor)." << endl;
                out.reset_color();

                return CR_OK;
            }
        }
        else if(p0 == "unassign")
        {
            // if there's a unit selected...
            df::unit *unit = getSelectedUnit(out, true);
            if (unit) {
                // remove assignment reference from unit and old zone
                if(unassignUnitFromBuilding(unit))
                {
                    out.color(COLOR_BLUE);
                    out << "Selected unit unassigned." << endl;
                    out.reset_color();

                }
                else
                {
                    out.color(COLOR_RED);
                    out << "Selected unit is not assigned to an activity zone!"
                        << endl;
                    out.reset_color();

                }
            }

            // if followed by another parameter, check if it's numeric
            bool target_building_given = false;
            if(parameters.size() >= 2)
            {
                auto & str = parameters[1];
                if(str.size() > 0 && str[0] >= '0' && str[0] <= '9')
                {
                    stringstream ss(parameters[1]);
                    int new_building = -1;
                    ss >> new_building;
                    if(new_building != -1)
                    {
                        target_building = df::building::find(new_building);
                        target_building_given = true;
                        out << "Using building #" << new_building << endl;
                    }
                    else
                    {
                        out.color(COLOR_RED);
                        out << "Couldn't parse " << parameters[1] << endl;
                        out.reset_color();

                    }
                }
            }
            if (!target_building_given)
            {
                if(target_building) {
                    out << "No building id specified. Will use #"
                        << target_building->id << endl;
                } else {
                    out.color(COLOR_RED);
                    out << "No building id specified and current one is invalid!" << endl;
                    out.reset_color();

                    return CR_WRONG_USAGE;
                }
            }

            out << "Unassigning unit(s) from building..." << endl;
            building_unassign = true;
            start_index = 1;
        }
        else if(p0 == "uinfo")
        {
            out << "Logging unit info..." << endl;
            unit_info = true;
            start_index = 1;
        }
        else if(p0 == "assign" || p0 == "tocages")
        {
            const char* const building_type = p0 == "assign" ? "building" : "cage zone";

            // if followed by another parameter, check if it's numeric

            bool target_building_given = false;
            if(parameters.size() >= 2)
            {
                auto & str = parameters[1];
                if(str.size() > 0 && str[0] >= '0' && str[0] <= '9')
                {
                    stringstream ss(parameters[1]);
                    int new_building = -1;
                    ss >> new_building;
                    if(new_building != -1)
                    {
                        target_building = df::building::find(new_building);
                        target_building_given = true;
                        out << "Assign unit(s) to " << building_type
                            << " #" << new_building << endl;
                        start_index = 2;
                    }
                }
            }
            if(!target_building_given)
            {
                if(target_building) {
                    out << "No " << building_type << " id specified. Will use #"
                        << target_building->id << endl;
                    building_assign = true;
                    start_index = 1;
                } else {
                    out.color(COLOR_RED);
                    out << "No " << building_type
                        << " id specified and current one is invalid!" << endl;
                    out.reset_color();

                    return CR_WRONG_USAGE;
                }
            }

            if (p0 == "assign")
            {
                building_assign = true;
            }
            else
            {
                cagezone_assign = true;
            }
        }
        else if(p0 == "slaughter")
        {
            out << "Assign animals for slaughter." << endl;
            unit_slaughter = true;
            start_index = 1;
        }
        else if(p0 == "nick")
        {
            if(parameters.size() <= 2)
            {
                out.printerr("No nickname specified! Use 'remnick' to remove nicknames!\n");
                return CR_WRONG_USAGE;
            }
            nick_set = true;
            target_nick = parameters[1];
            start_index = 2;
            out << "Set nickname to: " << target_nick << endl;
        }
        else if(p0 == "enumnick")
        {
            if(parameters.size() <= 2)
            {
                out.printerr("No prefix specified! Use 'remnick' to remove nicknames!\n");
                return CR_WRONG_USAGE;
            }
            enum_nick = true;
            enum_prefix = parameters[1];
            start_index = 2;
            out << "Set nickname to: " << enum_prefix <<" <N>" << endl;
        }
        else if(p0 == "remnick")
        {
            nick_set = true;
            target_nick = "";
            start_index = 1;
            out << "Remove nicknames..." << endl;
        }
        else if(p0 == "zone") {
            // when there are no other arguments
            return CR_WRONG_USAGE;
        }
        else
        {
            out.color(COLOR_RED);
            out << "Unknown command: " << p0 << endl;
            out.reset_color();

            return CR_WRONG_USAGE;
        }
    }

    // whether to invert the next filter we read
    bool invert_filter = false;

    // custom handling for things with defaults
    bool merchant_filter_set = false;
    bool named_filter_set = false;
    bool race_filter_set = false;

    // a vector of active filters
    // if all filters return true, we process a unit
    // if any filter returns false, we skip that unit
    vector<function<bool(df::unit*)>> active_filters;

    for (size_t i = start_index; i < parameters.size(); i++)
    {
        string& p = parameters[i];

        if(p == "verbose")
        {
            if(invert_filter)
            {
                out.color(COLOR_RED);
                out << "Note: 'not verbose' unnecessary, verbose mode disabled by default"
                    << endl;
                out.reset_color();

            }
            verbose = !invert_filter;
            invert_filter = false;
        }
        else if(p == "not")
        {
            invert_filter = true;
        }
        else if(p == "count")
        {
            if(invert_filter)
            {
                out.color(COLOR_RED);
                out << "Error: 'not count' doesn't make sense." << endl;
                out.reset_color();

                return CR_WRONG_USAGE;
            }
            if(i == parameters.size()-1)
            {
                out.color(COLOR_RED);
                out << "Error: no count specified." << endl;
                out.reset_color();

                return CR_WRONG_USAGE;
            }
            else
            {
                stringstream ss(parameters[i+1]);
                i++;
                ss >> target_count;
                if(target_count <= 0)
                {
                    out.color(COLOR_RED);
                    out << "Error: invalid count specified (must be > 0)."
                        << endl;
                    out.reset_color();

                }
                out.color(COLOR_GREEN);
                out << "Process up to " << target_count << " units."
                    << endl;
                out.reset_color();

            }
        }
        else if(p == "all")
        {
            if(invert_filter) {
                out.color(COLOR_RED);
                out << "Error: 'not all' doesn't make sense."
                    << endl;
                out.reset_color();

                return CR_WRONG_USAGE;
            }
            out.color(COLOR_GREEN);
            out << "Process all units." << endl;
            out.reset_color();

            target_count = INT_MAX;
        }
        else if (zone_filters.count(p) == 1) {
            string& desc = zone_filter_notes.count(p) == 1 ?
                zone_filter_notes[p] : p;

            if (invert_filter) {
                auto &filter = zone_filters[p];

                auto z = not1(filter);

                // we have to invert the filter, so we use a closure
                active_filters.push_back(not1(filter));

                out.color(COLOR_GREEN);
                out << "Filter: 'not " << desc << "'"
                    << endl;
                out.reset_color();

            } else {
                active_filters.push_back(zone_filters[p]);
                out.color(COLOR_GREEN);
                out << "Filter: '" << desc << "'"
                    << endl;
                out.reset_color();

            }

            invert_filter = false;
        } else if (zone_param_filters.count(p) == 1) {
            // get the constructor
            auto &filter_pair = zone_param_filters[p];
            auto arg_count = filter_pair.first;
            auto &filter_constructor = filter_pair.second;
            vector<string> args;

            // get arguments
            while (arg_count) {
                i++;
                arg_count--;
                args.push_back(parameters[i]);
            }

            // get results
            try {
                auto result_pair = filter_constructor(args);
                string& desc = result_pair.first;
                auto& filter = result_pair.second;

                if (invert_filter) {
                    active_filters.push_back(not1(filter));
                    out.color(COLOR_GREEN);
                    out << "Filter: 'not " << desc << "'"
                        << endl;
                    out.reset_color();

                } else {
                    active_filters.push_back(filter);
                    out.color(COLOR_GREEN);
                    out << "Filter: '" << desc << "'"
                        << endl;
                    out.reset_color();

                }
                invert_filter = false;

                if (p == "race") {
                    race_filter_set = true;
                }
            } catch (const exception&) {
                return CR_FAILURE;
            }
        }
        else if(p == "merchant")
        {
            if (invert_filter) {
                out.color(COLOR_GREEN);
                out << "Filter: 'not merchant'" << endl;
                out.reset_color();

                active_filters.push_back([](df::unit *unit)
                    {
                        return !isMerchant(unit) && !isForest(unit);
                    }
                );
            } else {
                out.color(COLOR_GREEN);
                out << "Filter: 'merchant'" << endl;
                out.reset_color();

                active_filters.push_back([](df::unit *unit)
                    {
                        return isMerchant(unit) || isForest(unit);
                    }
                );
            }
            merchant_filter_set = true;
            invert_filter = false;
        }
        else if(p == "named")
        {
            if (invert_filter) {
                out.color(COLOR_GREEN);
                out << "Filter: 'not named'" << endl;
                out.reset_color();

                if (unit_slaughter) {
                    out.color(COLOR_RED);
                    out << "Note: 'not named' unnecessary when slaughtering, "
                        "named units ignored by default" << endl;
                    out.reset_color();

                }
                active_filters.push_back([](df::unit *unit)
                    {
                        return !unit->name.has_name;
                    }
                );
            }
            else
            {
                out.color(COLOR_GREEN);
                out << "Filter: 'named'" << endl;
                out.reset_color();

                active_filters.push_back([](df::unit *unit)
                    {
                        return unit->name.has_name;
                    }
                );
            }
            named_filter_set = true;
            invert_filter = false;
        } else {
            out.printerr("Unknown command: %s\n", p.c_str());
            return CR_WRONG_USAGE;
        }
    }

    if (building_unassign)
    {
        // filter for units in the building
        unordered_set<int32_t> assigned_unit_ids;
        if(isActivityZone(target_building))
        {
            df::building_civzonest *civz = (df::building_civzonest *) target_building;
            auto &assigned_units_vec = civz->assigned_units;

            copy(assigned_units_vec.begin(),
                   assigned_units_vec.end(),
                   std::inserter(assigned_unit_ids, assigned_unit_ids.end()));

        }
        else if(isCage(target_building))
        {
            df::building_cagest *cage = (df::building_cagest *) target_building;
            auto &assigned_units_vec = cage->assigned_units;

            copy(assigned_units_vec.begin(),
                   assigned_units_vec.end(),
                   std::inserter(assigned_unit_ids, assigned_unit_ids.end()));

        }
        else if(isChain(target_building))
        {
            out.color(COLOR_RED);
            out << "Sorry, unassigning units from chains is not possible yet."
                << endl;
            out.reset_color();

            return CR_FAILURE;
        }
        else
        {
            out.color(COLOR_RED);
            out << "Cannot unassign units from this type of building!"
                << endl;
            out.reset_color();

            return CR_FAILURE;
        }

        active_filters.push_back([assigned_unit_ids](df::unit *unit) -> bool
            {
                return assigned_unit_ids.count(unit->id) == 1;
            }
        );
    }

    if (target_count == 0)
    {
        out.color(COLOR_RED);
        out << "No target count! 'zone " << parameters[0]
            << "' must be followed by 'all' or 'count [COUNT]'." << endl;
        out.reset_color();

        return CR_WRONG_USAGE;
    }

    if(!race_filter_set && (building_assign || cagezone_assign || unit_slaughter))
    {
        string own_race_name = getRaceNameById(ui->race_id);
        out.color(COLOR_BROWN);
        out << "Default filter for " << parameters[0]
            << ": 'not (race " << own_race_name << " or own civilization)'; use 'race "
            << own_race_name << "' filter to override."
            << endl;
        out.reset_color();

        active_filters.push_back([](df::unit *unit)
            {
                return !isOwnRace(unit) || !isOwnCiv(unit);
            }
        );
    }
    if(!named_filter_set && unit_slaughter)
    {
        out.color(COLOR_BROWN);
        out << "Default filter for " << parameters[0]
            << ": 'not named'; use 'named' filter to override."
            << endl;
        out.reset_color();

        active_filters.push_back([](df::unit *unit)
            {
                return !unit->name.has_name;
            }
        );
    }
    if(!merchant_filter_set && (building_assign || cagezone_assign || unit_slaughter))
    {
        out.color(COLOR_BROWN);
        out << "Default filter for " << parameters[0]
            << ": 'not merchant'; use 'merchant' filter to override."
            << endl;
        out.reset_color();

        active_filters.push_back([](df::unit *unit)
            {
                return !isMerchant(unit) && !isForest(unit);
            }
        );
    }

    if(building_assign || cagezone_assign || (nick_set && target_count == 0))
    {
        if (!target_building)
        {
            out.color(COLOR_RED);
            out << "Invalid building id." << endl;
            out.reset_color();

            return CR_WRONG_USAGE;
        }
        if(nick_set)
        {
            out.color(COLOR_BLUE);
            out << "Renaming all units in target building."
                << endl;
            out.reset_color();

            return nickUnitsInBuilding(out, target_building, target_nick);
        }
    }

    if(target_count > 0)
    {
        vector <df::unit*> units_for_cagezone;
        int count = 0;
        int matchedCount = 0;
        for(auto unit_it = world->units.all.begin(); unit_it != world->units.all.end(); ++unit_it)
        {
            df::unit *unit = *unit_it;

            // ignore inactive and undead units
            if (!isActive(unit) || isUndead(unit)) {
                continue;
            }

            bool passes_all_filters = true;

            for (auto filter_it = active_filters.begin(); filter_it != active_filters.end(); ++filter_it)
            {
                auto &filter = *filter_it;

                if (!filter(unit)) {
                    passes_all_filters = false;
                    break;
                }
            }

            if (!passes_all_filters) {
                continue;
            }

            // animals bought in cages have an invalid map pos until they are freed for the first time
            // but if they are not in a cage and have an invalid pos it's better not to touch them
            if(!isContainedInItem(unit) && !hasValidMapPos(unit))
            {
                if(verbose)
                {
                    out << "----------"<<endl;
                    out << "invalid unit pos but not in cage either. will skip this unit." << endl;
                    unitInfo(out, unit, verbose);
                    out << "----------"<<endl;
                }
                continue;
            }
            
            matchedCount++;

            if(unit_info)
            {
                unitInfo(out, unit, verbose);
                continue;
            }
            else if(nick_set)
            {
                Units::setNickname(unit, target_nick);
            }
            else if(enum_nick)
            {
                std::stringstream ss;
                ss << enum_prefix << " " << matchedCount;
                Units::setNickname(unit, ss.str());
            }
            else if(cagezone_assign)
            {
                units_for_cagezone.push_back(unit);
            }
            else if(building_assign)
            {
                command_result result = assignUnitToBuilding(out, unit, target_building, verbose);
                if(result != CR_OK)
                    return result;
            }
            else if(unit_slaughter)
            {
                doMarkForSlaughter(unit);
            }
            else if(building_unassign)
            {
                bool removed = unassignUnitFromBuilding(unit);

                if (removed)
                {
                    out << "Unit " << unit->id
                        << "(" << getRaceName(unit) << ")"
                        << " unassigned from";

                    if (isActivityZone(target_building))
                    {
                        out << " zone ";
                    }
                    else if (isCage(target_building))
                    {
                        out << " cage ";
                    }
                    else if (isChain(target_building))
                    {
                        out << " chain ";
                    }
                    else
                    {
                        out << " ???? ";
                    }

                    out << target_building->id << endl;
                }
                else
                {
                    out.printerr("Failed to remove unit from building:");
                    unitInfo(out, unit, true);
                }

            }

            count++;
            if(count >= target_count)
                break;
        }
        if(cagezone_assign)
        {
            command_result result = assignUnitsToCagezone(out, units_for_cagezone, target_building, verbose);
            if(result != CR_OK)
                return result;
        }

        out.color(COLOR_BLUE);
        out << "Matched creatures: " << matchedCount << endl;
        out << "Processed creatures: " << count << endl;
        out.reset_color();
    }
    else
    {
        // must have unit selected
        df::unit *unit = getSelectedUnit(out, true);
        if (!unit) {
            out.color(COLOR_RED);
            out << "Error: no unit selected!" << endl;
            out.reset_color();

            return CR_WRONG_USAGE;
        }

        if(unit_info)
        {
            unitInfo(out, unit, verbose);
            return CR_OK;
        }
        else if(building_assign)
        {
            return assignUnitToBuilding(out, unit, target_building, verbose);
        }
        else if(unit_slaughter)
        {
            doMarkForSlaughter(unit);
            return CR_OK;
        }
    }

    return CR_OK;
}

////////////////////
// autonestbox stuff

command_result df_autonestbox(color_ostream &out, vector <string> & parameters)
{
    CoreSuspender suspend;

    bool verbose = false;

    for (size_t i = 0; i < parameters.size(); i++)
    {
        string & p = parameters[i];

        if (p == "help" || p == "?")
        {
            out << autonestbox_help << endl;
            return CR_OK;
        }
        if (p == "start")
        {
            autonestbox_did_complain = false;
            start_autonestbox(out);
            return autoNestbox(out, verbose);
        }
        if (p == "stop")
        {
            enable_autonestbox = false;
            if(config_autonestbox.isValid())
                config_autonestbox.ival(0) = 0;
            out << "Autonestbox stopped." << endl;
            return CR_OK;
        }
        else if(p == "verbose")
        {
            verbose = true;
        }
        else if(p == "sleep")
        {
            if(i == parameters.size()-1)
            {
                out.printerr("No duration specified!\n");
                return CR_WRONG_USAGE;
            }
            else
            {
                size_t ticks = 0;
                stringstream ss(parameters[i+1]);
                i++;
                ss >> ticks;
                if(ticks <= 0)
                {
                    out.printerr("Invalid duration specified (must be > 0)!\n");
                    return CR_WRONG_USAGE;
                }
                sleep_autonestbox = ticks;
                if(config_autonestbox.isValid())
                    config_autonestbox.ival(1) = sleep_autonestbox;
                out << "New sleep timer for autonestbox: " << ticks << " ticks." << endl;
                return CR_OK;
            }
        }
        else
        {
            out << "Unknown command: " << p << endl;
            return CR_WRONG_USAGE;
        }
    }
    return autoNestbox(out, verbose);
}

command_result autoNestbox( color_ostream &out, bool verbose = false )
{
    bool stop = false;
    size_t processed = 0;

    if (!Maps::IsValid())
    {
        out.printerr("Map is not available!\n");
        enable_autonestbox = false;
        return CR_FAILURE;
    }

    do
    {
        df::building * free_building = findFreeNestboxZone();
        df::unit * free_unit = findFreeEgglayer();
        if(free_building && free_unit)
        {
            command_result result = assignUnitToBuilding(out, free_unit, free_building, verbose);
            if(result != CR_OK)
                return result;
            processed ++;
        }
        else
        {
            stop = true;
            if(free_unit && !free_building)
            {
                static size_t old_count = 0;
                size_t freeEgglayers = countFreeEgglayers();
                // avoid spamming the same message
                if(old_count != freeEgglayers)
                    autonestbox_did_complain = false;
                old_count = freeEgglayers;
                if(!autonestbox_did_complain)
                {
                    stringstream ss;
                    ss << freeEgglayers;
                    string announce = "Not enough free nestbox zones found! You need " + ss.str() + " more.";
                    Gui::showAnnouncement(announce, 6, true);
                    out << announce << endl;
                    autonestbox_did_complain = true;
                }
            }
        }
    } while (!stop);
    if(processed > 0)
    {
        stringstream ss;
        ss << processed;
        string announce;
        announce = ss.str() + " nestboxes were assigned.";
        Gui::showAnnouncement(announce, 2, false);
        out << announce << endl;
        // can complain again
        // (might lead to spamming the same message twice, but catches the case
        // where for example 2 new egglayers hatched right after 2 zones were created and assigned)
        autonestbox_did_complain = false;
    }
    return CR_OK;
}

////////////////////
// autobutcher stuff

// getUnitAge() returns 0 if born in current year, therefore the look at birth_time in that case
// (assuming that the value from there indicates in which tick of the current year the unit was born)
bool compareUnitAgesYounger(df::unit* i, df::unit* j)
{
    int32_t age_i = (int32_t) getAge(i, true);
    int32_t age_j = (int32_t) getAge(j, true);
    if(age_i == 0 && age_j == 0)
    {
        age_i = i->birth_time;
        age_j = j->birth_time;
    }
    return (age_i < age_j);
}
bool compareUnitAgesOlder(df::unit* i, df::unit* j)
{
    int32_t age_i = (int32_t) getAge(i, true);
    int32_t age_j = (int32_t) getAge(j, true);
    if(age_i == 0 && age_j == 0)
    {
        age_i = i->birth_time;
        age_j = j->birth_time;
    }
    return (age_i > age_j);
}



//enum WatchedRaceSubtypes
//{
//    femaleKid=0,
//    maleKid,
//    femaleAdult,
//    maleAdult
//};

enum unit_ptr_index
{
 fk_index = 0,
 mk_index = 1,
 fa_index = 2,
 ma_index = 3
};

struct WatchedRace
{
public:
    PersistentDataItem rconfig;

    bool isWatched; // if true, autobutcher will process this race
    int raceId;

    // target amounts
    unsigned fk; // max female kids
    unsigned mk; // max male kids
    unsigned fa; // max female adults
    unsigned ma; // max male adults

    // amounts of protected (not butcherable) units
    unsigned fk_prot;
    unsigned fa_prot;
    unsigned mk_prot;
    unsigned ma_prot;

    // butcherable units
    vector <df::unit*> unit_ptr[4];

    // priority butcherable units
    vector <df::unit*> prot_ptr[4];

    WatchedRace(bool watch, int id, unsigned _fk, unsigned _mk, unsigned _fa, unsigned _ma)
    {
        isWatched = watch;
        raceId = id;
        fk = _fk;
        mk = _mk;
        fa = _fa;
        ma = _ma;
        fk_prot = fa_prot = mk_prot = ma_prot = 0;
    }

    ~WatchedRace()
    {
        ClearUnits();
    }

    void UpdateConfig(color_ostream & out)
    {
        if(!rconfig.isValid())
        {
            string keyname = "autobutcher/watchlist/" + getRaceNameById(raceId);
            rconfig = World::GetPersistentData(keyname, NULL);
        }
        if(rconfig.isValid())
        {
            rconfig.ival(0) = raceId;
            rconfig.ival(1) = isWatched;
            rconfig.ival(2) = fk;
            rconfig.ival(3) = mk;
            rconfig.ival(4) = fa;
            rconfig.ival(5) = ma;
        }
        else
        {
            // this should never happen
            string keyname = "autobutcher/watchlist/" + getRaceNameById(raceId);
            out << "Something failed, could not find/create config key " << keyname << "!" << endl;
        }
    }

    void RemoveConfig(color_ostream & out)
    {
        if(!rconfig.isValid())
            return;
        World::DeletePersistentData(rconfig);
    }

    void SortUnitsByAge()
    {
        sort(unit_ptr[fk_index].begin(), unit_ptr[fk_index].end(), compareUnitAgesOlder);
        sort(unit_ptr[mk_index].begin(), unit_ptr[mk_index].end(), compareUnitAgesOlder);
        sort(unit_ptr[fa_index].begin(), unit_ptr[fa_index].end(), compareUnitAgesYounger);
        sort(unit_ptr[ma_index].begin(), unit_ptr[ma_index].end(), compareUnitAgesYounger);
        sort(prot_ptr[fk_index].begin(), prot_ptr[fk_index].end(), compareUnitAgesOlder);
        sort(prot_ptr[mk_index].begin(), prot_ptr[mk_index].end(), compareUnitAgesOlder);
        sort(prot_ptr[fa_index].begin(), prot_ptr[fa_index].end(), compareUnitAgesYounger);
        sort(prot_ptr[ma_index].begin(), prot_ptr[ma_index].end(), compareUnitAgesYounger);
    }

    void PushUnit(df::unit * unit)
    {
        if(isFemale(unit))
        {
            if(isBaby(unit) || isChild(unit))
                unit_ptr[fk_index].push_back(unit);
            else
                unit_ptr[fa_index].push_back(unit);
        }
        else //treat sex n/a like it was male
        {
            if(isBaby(unit) || isChild(unit))
                unit_ptr[mk_index].push_back(unit);
            else
                unit_ptr[ma_index].push_back(unit);
        }
    }

    void PushPriorityUnit(df::unit * unit)
    {
        if(isFemale(unit))
        {
            if(isBaby(unit) || isChild(unit))
                prot_ptr[fk_index].push_back(unit);
            else
                prot_ptr[fa_index].push_back(unit);
        }
        else
        {
            if(isBaby(unit) || isChild(unit))
                prot_ptr[mk_index].push_back(unit);
            else
                prot_ptr[ma_index].push_back(unit);
        }
    }

    void PushProtectedUnit(df::unit * unit)
    {
        if(isFemale(unit))
        {
            if(isBaby(unit) || isChild(unit))
                fk_prot++;
            else
                fa_prot++;
        }
        else //treat sex n/a like it was male
        {
            if(isBaby(unit) || isChild(unit))
                mk_prot++;
            else
                ma_prot++;
        }
    }

    void ClearUnits()
    {
        fk_prot = fa_prot = mk_prot = ma_prot = 0;
        for (size_t i = 0; i < 4; i++)
        {
            unit_ptr[i].clear();
            prot_ptr[i].clear();
        }
    }

    int ProcessUnits(vector<df::unit*>& unit_ptr, vector<df::unit*>& unit_pri_ptr, unsigned prot, unsigned goal)
    {
        int subcount = 0;
        while(unit_pri_ptr.size() && (unit_ptr.size() + unit_pri_ptr.size() + prot > goal) )
        {
            df::unit* unit = unit_pri_ptr.back();
            doMarkForSlaughter(unit);
            unit_pri_ptr.pop_back();
            subcount++;
        }
        while(unit_ptr.size() && (unit_ptr.size() + prot > goal) )
        {
            df::unit* unit = unit_ptr.back();
            doMarkForSlaughter(unit);
            unit_ptr.pop_back();
            subcount++;
        }
        return subcount;
    }

    int ProcessUnits()
    {
        SortUnitsByAge();
        int slaughter_count = 0;
        slaughter_count += ProcessUnits(unit_ptr[fk_index], prot_ptr[fk_index], fk_prot, fk);
        slaughter_count += ProcessUnits(unit_ptr[mk_index], prot_ptr[mk_index], mk_prot, mk);
        slaughter_count += ProcessUnits(unit_ptr[fa_index], prot_ptr[fa_index], fa_prot, fa);
        slaughter_count += ProcessUnits(unit_ptr[ma_index], prot_ptr[ma_index], ma_prot, ma);
        ClearUnits();
        return slaughter_count;
    }
};
// vector of races handled by autobutcher
// the name is a bit misleading since entries can be set to 'unwatched'
// to ignore them for a while but still keep the target count settings
std::vector<WatchedRace*> watched_races;

// helper for sorting the watchlist alphabetically
bool compareRaceNames(WatchedRace* i, WatchedRace* j)
{
    string name_i = getRaceNamePluralById(i->raceId);
    string name_j = getRaceNamePluralById(j->raceId);

    return (name_i < name_j);
}

static void autobutcher_sortWatchList(color_ostream &out);

// default target values for autobutcher
static unsigned default_fk = 5;
static unsigned default_mk = 1;
static unsigned default_fa = 5;
static unsigned default_ma = 1;

command_result df_autobutcher(color_ostream &out, vector <string> & parameters)
{
    CoreSuspender suspend;

    bool verbose = false;
    bool watch_race = false;
    bool unwatch_race = false;
    bool forget_race = false;
    bool list_watched = false;
    bool list_export = false;
    bool change_target = false;
    vector <string> target_racenames;
    vector <int> target_raceids;

    unsigned target_fk = default_fk;
    unsigned target_mk = default_mk;
    unsigned target_fa = default_fa;
    unsigned target_ma = default_ma;

    if(!parameters.size())
    {
        out << "You must specify a command!" << endl;
        out << autobutcher_help << endl;
        return CR_OK;
    }

    // parse main command
    string & p = parameters[0];
    if (p == "help" || p == "?")
    {
        out << autobutcher_help << endl;
        return CR_OK;
    }
    if (p == "example")
    {
        out << autobutcher_help_example << endl;
        return CR_OK;
    }
    else if (p == "start")
    {
        plugin_enable(out, true);
        enable_autobutcher = true;
        start_autobutcher(out);
        return autoButcher(out, verbose);
    }
    else if (p == "stop")
    {
        enable_autobutcher = false;
        if(config_autobutcher.isValid())
            config_autobutcher.ival(0) = enable_autobutcher;
        out << "Autobutcher stopped." << endl;
        return CR_OK;
    }
    else if(p == "sleep")
    {
        parameters.erase(parameters.begin());
        if(!parameters.size())
        {
            out.printerr("No duration specified!\n");
            return CR_WRONG_USAGE;
        }
        else
        {
            size_t ticks = 0;
            stringstream ss(parameters.back());
            ss >> ticks;
            if(ticks <= 0)
            {
                out.printerr("Invalid duration specified (must be > 0)!\n");
                return CR_WRONG_USAGE;
            }
            sleep_autobutcher = ticks;
            if(config_autobutcher.isValid())
                config_autobutcher.ival(1) = sleep_autobutcher;
            out << "New sleep timer for autobutcher: " << ticks << " ticks." << endl;
            return CR_OK;
        }
    }
    else if(p == "watch")
    {
        parameters.erase(parameters.begin());
        watch_race = true;
        out << "Start watching race(s): "; // << endl;
    }
    else if(p == "unwatch")
    {
        parameters.erase(parameters.begin());
        unwatch_race = true;
        out << "Stop watching race(s): "; // << endl;
    }
    else if(p == "forget")
    {
        parameters.erase(parameters.begin());
        forget_race = true;
        out << "Removing race(s) from watchlist: "; // << endl;
    }
    else if(p == "target")
    {
        // needs at least 5 more parameters:
        // fk mk fa ma R (can have more than 1 R)
        if(parameters.size() < 6)
        {
            out.printerr("Not enough parameters!\n");
            return CR_WRONG_USAGE;
        }
        else
        {
            stringstream fk(parameters[1]);
            stringstream mk(parameters[2]);
            stringstream fa(parameters[3]);
            stringstream ma(parameters[4]);
            fk >> target_fk;
            mk >> target_mk;
            fa >> target_fa;
            ma >> target_ma;
            parameters.erase(parameters.begin(), parameters.begin()+5);
            change_target = true;
            out << "Setting new target count for race(s): "; // << endl;
        }
    }
    else if(p == "autowatch")
    {
        out << "Auto-adding to watchlist started." << endl;
        enable_autobutcher_autowatch = true;
        if(config_autobutcher.isValid())
            config_autobutcher.ival(2) = enable_autobutcher_autowatch;
        return CR_OK;
    }
    else if(p == "noautowatch")
    {
        out << "Auto-adding to watchlist stopped." << endl;
        enable_autobutcher_autowatch = false;
        if(config_autobutcher.isValid())
            config_autobutcher.ival(2) = enable_autobutcher_autowatch;
        return CR_OK;
    }
    else if(p == "list")
    {
        list_watched = true;
    }
    else if(p == "list_export")
    {
        list_export = true;
    }
    else
    {
        out << "Unknown command: " << p << endl;
        return CR_WRONG_USAGE;
    }

    if(list_watched)
    {
        out << "Autobutcher status: ";

        if(enable_autobutcher)
            out << "enabled,";
        else
            out << "not enabled,";

        if (enable_autobutcher_autowatch)
            out << " autowatch,";
        else
            out << " noautowatch,";

        out << " sleep: " << sleep_autobutcher << endl;

        out << "Default setting for new races:"
            << " fk=" << default_fk
            << " mk=" << default_mk
            << " fa=" << default_fa
            << " ma=" << default_ma
            << endl;

        if(!watched_races.size())
        {
            out << "The autobutcher race list is empty." << endl;
            return CR_OK;
        }

        out << "Races on autobutcher list: " << endl;
        for(size_t i=0; i<watched_races.size(); i++)
        {
            WatchedRace * w = watched_races[i];
            df::creature_raw * raw = world->raws.creatures.all[w->raceId];
            string name = raw->creature_id;
            if(w->isWatched)
                out << "watched: ";
            else
                out << "not watched: ";
            out << name
                << " fk=" << w->fk
                << " mk=" << w->mk
                << " fa=" << w->fa
                << " ma=" << w->ma
                << endl;
        }
        return CR_OK;
    }

    if(list_export)
    {
        // force creation of config
        out << "autobutcher start" << endl;

        if(!enable_autobutcher)
            out << "autobutcher stop" << endl;

        if (enable_autobutcher_autowatch)
            out << "autobutcher autowatch" << endl;

        out << "autobutcher sleep " << sleep_autobutcher << endl;
        out << "autobutcher target"
            << " " << default_fk
            << " " << default_mk
            << " " << default_fa
            << " " << default_ma
            << " new" << endl;

        for(size_t i=0; i<watched_races.size(); i++)
        {
            WatchedRace * w = watched_races[i];
            df::creature_raw * raw = world->raws.creatures.all[w->raceId];
            string name = raw->creature_id;

            out << "autobutcher target"
                << " " << w->fk
                << " " << w->mk
                << " " << w->fa
                << " " << w->ma
                << " " << name << endl;

            if(w->isWatched)
                out << "autobutcher watch " << name << endl;
        }
        return CR_OK;
    }

    // parse rest of parameters for commands followed by a list of races
    if(    watch_race
        || unwatch_race
        || forget_race
        || change_target )
    {
        if(!parameters.size())
        {
            out.printerr("No race(s) specified!\n");
            return CR_WRONG_USAGE;
        }
        while(parameters.size())
        {
            string tr = parameters.back();
            target_racenames.push_back(tr);
            parameters.pop_back();
            out << tr << " ";
        }
        out << endl;
    }

    if(change_target && target_racenames.size() && target_racenames[0] == "all")
    {
        out << "Setting target count for all races on watchlist." << endl;
        for(size_t i=0; i<watched_races.size(); i++)
        {
            WatchedRace * w = watched_races[i];
            w->fk = target_fk;
            w->mk = target_mk;
            w->fa = target_fa;
            w->ma = target_ma;
            w->UpdateConfig(out);
        }
    }

    if(target_racenames.size() && (target_racenames[0] == "all" || target_racenames[0] == "new"))
    {
        if(change_target)
        {
            out << "Setting target count for the future." << endl;
            default_fk = target_fk;
            default_mk = target_mk;
            default_fa = target_fa;
            default_ma = target_ma;
            if(config_autobutcher.isValid())
            {
                config_autobutcher.ival(3) = default_fk;
                config_autobutcher.ival(4) = default_mk;
                config_autobutcher.ival(5) = default_fa;
                config_autobutcher.ival(6) = default_ma;
            }
            return CR_OK;
        }
        else if(target_racenames[0] == "new")
        {
            out << "The only valid usage of 'new' is in combination when setting a target count!" << endl;

            // hm, maybe instead of complaining start/stop autowatch instead? and get rid of the autowatch option?
            if(unwatch_race)
                out << "'unwatch new' makes no sense! Use 'noautowatch' instead." << endl;
            else if(forget_race)
                out << "'forget new' makes no sense, 'forget' is only for existing watchlist entries! Use 'noautowatch' instead." << endl;
            else if(watch_race)
                out << "'watch new' makes no sense! Use 'autowatch' instead." << endl;
            return CR_WRONG_USAGE;
        }
    }

    if(target_racenames.size() && target_racenames[0] == "all")
    {
        // fill with race ids from watchlist
        for(size_t i=0; i<watched_races.size(); i++)
        {
            WatchedRace * w = watched_races[i];
            target_raceids.push_back(w->raceId);
        }
    }
    else
    {
        // map race names from parameter list to ids
        size_t num_races = world->raws.creatures.all.size();
        while(target_racenames.size())
        {
            bool found_race = false;
            for(size_t i=0; i<num_races; i++)
            {
                if(getRaceNameById(i) == target_racenames.back())
                {
                    target_raceids.push_back(i);
                    target_racenames.pop_back();
                    found_race = true;
                    break;
                }
            }
            if(!found_race)
            {
                out << "Race not found: " << target_racenames.back() << endl;
                return CR_OK;
            }
        }
    }

    while(target_raceids.size())
    {
        bool entry_found = false;
        for(size_t i=0; i<watched_races.size(); i++)
        {
            WatchedRace * w = watched_races[i];
            if(w->raceId == target_raceids.back())
            {
                if(unwatch_race)
                {
                    w->isWatched=false;
                    w->UpdateConfig(out);
                }
                else if(forget_race)
                {
                    w->RemoveConfig(out);
                    watched_races.erase(watched_races.begin()+i);
                }
                else if(watch_race)
                {
                    w->isWatched = true;
                    w->UpdateConfig(out);
                }
                else if(change_target)
                {
                    w->fk = target_fk;
                    w->mk = target_mk;
                    w->fa = target_fa;
                    w->ma = target_ma;
                    w->UpdateConfig(out);
                }
                entry_found = true;
                break;
            }
        }
        if(!entry_found && (watch_race||change_target))
        {
            WatchedRace * w = new WatchedRace(watch_race, target_raceids.back(), target_fk, target_mk, target_fa, target_ma);
            w->UpdateConfig(out);
            watched_races.push_back(w);
            autobutcher_sortWatchList(out);
        }
        target_raceids.pop_back();
    }

    return CR_OK;
}

// check watched_races vector for a race id, return -1 if nothing found
// calling method needs to check itself if the race is currently being watched or ignored
int getWatchedIndex(int id)
{
    for(size_t i=0; i<watched_races.size(); i++)
    {
        WatchedRace * w = watched_races[i];
        if(w->raceId == id) // && w->isWatched)
            return i;
    }
    return -1;
}

command_result autoButcher( color_ostream &out, bool verbose = false )
{
    // don't run if not supposed to
    if(!Maps::IsValid())
        return CR_OK;

    // check if there is anything to watch before walking through units vector
    if(!enable_autobutcher_autowatch)
    {
        bool watching = false;
        for(size_t i=0; i<watched_races.size(); i++)
        {
            WatchedRace * w = watched_races[i];
            if(w->isWatched)
            {
                watching = true;
                break;
            }
        }
        if(!watching)
            return CR_OK;
    }

    for(size_t i=0; i<world->units.all.size(); i++)
    {
        df::unit * unit = world->units.all[i];

        // this check is now divided into two steps, squeezed autowatch into the middle
        // first one ignores completely inappropriate units (dead, undead, not belonging to the fort, ...)
        // then let autowatch add units to the watchlist which will probably start breeding (owned pets, war animals, ...)
        // then process units counting those which can't be butchered (war animals, named pets, ...)
        // so that they are treated as "own stock" as well and count towards the target quota
        if(    !isActive(unit)
            || isUndead(unit)
            || isMarkedForSlaughter(unit)
            || isMerchant(unit) // ignore merchants' draught animals
            || isForest(unit) // ignore merchants' caged animals
            || !isOwnCiv(unit)
            || !isTame(unit)
            )
            continue;

        // found a bugged unit which had invalid coordinates but was not in a cage.
        // marking it for slaughter didn't seem to have negative effects, but you never know...
        if(!isContainedInItem(unit) && !hasValidMapPos(unit))
            continue;

        WatchedRace * w = NULL;
        int watched_index = getWatchedIndex(unit->race);
        if(watched_index != -1)
        {
            w = watched_races[watched_index];
        }
        else if(enable_autobutcher_autowatch)
        {
            w = new WatchedRace(true, unit->race, default_fk, default_mk, default_fa, default_ma);
            w->UpdateConfig(out);
            watched_races.push_back(w);

            string announce;
            announce = "New race added to autobutcher watchlist: " + getRaceNamePluralById(w->raceId);
            Gui::showAnnouncement(announce, 2, false);
            autobutcher_sortWatchList(out);
        }

        if(w && w->isWatched)
        {
            // don't butcher protected units, but count them as stock as well
            // this way they count towards target quota, so if you order that you want 1 female adult cat
            // and have 2 cats, one of them being a pet, the other gets butchered
            if(    isWar(unit)    // ignore war dogs etc
                || isHunter(unit) // ignore hunting dogs etc
                // ignore creatures in built cages which are defined as rooms to leave zoos alone
                // (TODO: better solution would be to allow some kind of slaughter cages which you can place near the butcher)
                || (isContainedInItem(unit) && isInBuiltCageRoom(unit))  // !!! see comments in isBuiltCageRoom()
                || isAvailableForAdoption(unit)
                || unit->name.has_name )
                w->PushProtectedUnit(unit);
            else if (   isGay(unit)
                     || isGelded(unit))
                w->PushPriorityUnit(unit);
            else
                w->PushUnit(unit);
        }
    }

    int slaughter_count = 0;
    for(size_t i=0; i<watched_races.size(); i++)
    {
        WatchedRace * w = watched_races[i];
        int slaughter_subcount = w->ProcessUnits();
        slaughter_count += slaughter_subcount;
        if(slaughter_subcount)
        {
            stringstream ss;
            ss << slaughter_subcount;
            string announce;
            announce = getRaceNamePluralById(w->raceId) + " marked for slaughter: " + ss.str();
            Gui::showAnnouncement(announce, 2, false);
        }
    }

    return CR_OK;
}

////////////////////////////////////////////////////
// autobutcher and autonestbox start/init/cleanup

command_result start_autobutcher(color_ostream &out)
{
    plugin_enable(out, true);
    enable_autobutcher = true;

    if (!config_autobutcher.isValid())
    {
        config_autobutcher = World::AddPersistentData("autobutcher/config");

        if (!config_autobutcher.isValid())
        {
            out << "Cannot enable autobutcher without a world!" << endl;
            return CR_OK;
        }

        config_autobutcher.ival(1) = sleep_autobutcher;
        config_autobutcher.ival(2) = enable_autobutcher_autowatch;
        config_autobutcher.ival(3) = default_fk;
        config_autobutcher.ival(4) = default_mk;
        config_autobutcher.ival(5) = default_fa;
        config_autobutcher.ival(6) = default_ma;
    }

    config_autobutcher.ival(0) = enable_autobutcher;

    out << "Starting autobutcher." << endl;
    init_autobutcher(out);
    return CR_OK;
}

command_result init_autobutcher(color_ostream &out)
{
    cleanup_autobutcher(out);

    config_autobutcher = World::GetPersistentData("autobutcher/config");
    if(config_autobutcher.isValid())
    {
        if (config_autobutcher.ival(0) == -1)
        {
            config_autobutcher.ival(0) = enable_autobutcher;
            config_autobutcher.ival(1) = sleep_autobutcher;
            config_autobutcher.ival(2) = enable_autobutcher_autowatch;
            config_autobutcher.ival(3) = default_fk;
            config_autobutcher.ival(4) = default_mk;
            config_autobutcher.ival(5) = default_fa;
            config_autobutcher.ival(6) = default_ma;
            out << "Autobutcher's persistent config object was invalid!" << endl;
        }
        else
        {
            enable_autobutcher = config_autobutcher.ival(0);
            sleep_autobutcher = config_autobutcher.ival(1);
            enable_autobutcher_autowatch = config_autobutcher.ival(2);
            default_fk = config_autobutcher.ival(3);
            default_mk = config_autobutcher.ival(4);
            default_fa = config_autobutcher.ival(5);
            default_ma = config_autobutcher.ival(6);
        }
    }

    if(!enable_autobutcher)
        return CR_OK;

    plugin_enable(out, true);
    // read watchlist from save

    std::vector<PersistentDataItem> items;
    World::GetPersistentData(&items, "autobutcher/watchlist/", true);
    for (auto p = items.begin(); p != items.end(); p++)
    {
        string key = p->key();
        out << "Reading from save: " << key << endl;
        //out << "  raceid: "   << p->ival(0) << endl;
        //out << "  watched: "  << p->ival(1) << endl;
        //out << "  fk: "       << p->ival(2) << endl;
        //out << "  mk: "       << p->ival(3) << endl;
        //out << "  fa: "       << p->ival(4) << endl;
        //out << "  ma: "       << p->ival(5) << endl;
        WatchedRace * w = new WatchedRace(p->ival(1), p->ival(0), p->ival(2), p->ival(3),p->ival(4),p->ival(5));
        w->rconfig = *p;
        watched_races.push_back(w);
    }
    autobutcher_sortWatchList(out);
    return CR_OK;
}

command_result cleanup_autobutcher(color_ostream &out)
{
    for(size_t i=0; i<watched_races.size(); i++)
    {
        delete watched_races[i];
    }
    watched_races.clear();
    return CR_OK;
}

command_result start_autonestbox(color_ostream &out)
{
    plugin_enable(out, true);
    enable_autonestbox = true;

    if (!config_autonestbox.isValid())
    {
        config_autonestbox = World::AddPersistentData("autonestbox/config");

        if (!config_autonestbox.isValid())
        {
            out << "Cannot enable autonestbox without a world!" << endl;
            return CR_OK;
        }

        config_autonestbox.ival(1) = sleep_autonestbox;
    }

    config_autonestbox.ival(0) = enable_autonestbox;

    out << "Starting autonestbox." << endl;
    init_autonestbox(out);
    return CR_OK;
}

command_result init_autonestbox(color_ostream &out)
{
    cleanup_autonestbox(out);

    config_autonestbox = World::GetPersistentData("autonestbox/config");
    if(config_autonestbox.isValid())
    {
        if (config_autonestbox.ival(0) == -1)
        {
            config_autonestbox.ival(0) = enable_autonestbox;
            config_autonestbox.ival(1) = sleep_autonestbox;
            out << "Autonestbox's persistent config object was invalid!" << endl;
        }
        else
        {
            enable_autonestbox = config_autonestbox.ival(0);
            sleep_autonestbox = config_autonestbox.ival(1);
        }
    }
    if (enable_autonestbox)
        plugin_enable(out, true);
    return CR_OK;
}

command_result cleanup_autonestbox(color_ostream &out)
{
    // nothing to cleanup currently
    // (future version of autonestbox could store info about cages for useless male kids)
    return CR_OK;
}

// abuse WatchedRace struct for counting stocks (since it sorts by gender and age)
// calling method must delete pointer!
WatchedRace * checkRaceStocksTotal(int race)
{
    WatchedRace * w = new WatchedRace(true, race, default_fk, default_mk, default_fa, default_ma);

    for(size_t i=0; i<world->units.all.size(); i++)
    {
        df::unit * unit = world->units.all[i];

        if(unit->race != race)
            continue;

        if(    !isActive(unit)
            || isUndead(unit)
            || isMerchant(unit) // ignore merchants' draught animals
            || isForest(unit) // ignore merchants' caged animals
            || !isOwnCiv(unit)
            )
            continue;

        // found a bugged unit which had invalid coordinates but was not in a cage.
        // marking it for slaughter didn't seem to have negative effects, but you never know...
        if(!isContainedInItem(unit) && !hasValidMapPos(unit))
            continue;

        w->PushUnit(unit);
    }
    return w;
}

WatchedRace * checkRaceStocksProtected(int race)
{
    WatchedRace * w = new WatchedRace(true, race, default_fk, default_mk, default_fa, default_ma);

    for(size_t i=0; i<world->units.all.size(); i++)
    {
        df::unit * unit = world->units.all[i];

        if(unit->race != race)
            continue;

        if(    !isActive(unit)
            || isUndead(unit)
            || isMerchant(unit) // ignore merchants' draught animals
            || isForest(unit) // ignore merchants' caged animals
            || !isOwnCiv(unit)
            )
            continue;

        // found a bugged unit which had invalid coordinates but was not in a cage.
        // marking it for slaughter didn't seem to have negative effects, but you never know...
        if(!isContainedInItem(unit) && !hasValidMapPos(unit))
            continue;

        if(   !isTame(unit)
           || isWar(unit) // ignore war dogs etc
           || isHunter(unit) // ignore hunting dogs etc
            // ignore creatures in built cages which are defined as rooms to leave zoos alone
            // (TODO: better solution would be to allow some kind of slaughter cages which you can place near the butcher)
            || (isContainedInItem(unit) && isInBuiltCageRoom(unit))  // !!! see comments in isBuiltCageRoom()
            || isAvailableForAdoption(unit)
            || unit->name.has_name )
            w->PushUnit(unit);
    }
    return w;
}

WatchedRace * checkRaceStocksButcherable(int race)
{
    WatchedRace * w = new WatchedRace(true, race, default_fk, default_mk, default_fa, default_ma);

    for(size_t i=0; i<world->units.all.size(); i++)
    {
        df::unit * unit = world->units.all[i];

        if(unit->race != race)
            continue;

        if(    !isActive(unit)
            || isUndead(unit)
            || isMerchant(unit) // ignore merchants' draught animals
            || isForest(unit) // ignore merchants' caged animals
            || !isOwnCiv(unit)
            || !isTame(unit)
            || isWar(unit) // ignore war dogs etc
            || isHunter(unit) // ignore hunting dogs etc
            // ignore creatures in built cages which are defined as rooms to leave zoos alone
            // (TODO: better solution would be to allow some kind of slaughter cages which you can place near the butcher)
            || (isContainedInItem(unit) && isInBuiltCageRoom(unit))  // !!! see comments in isBuiltCageRoom()
            || isAvailableForAdoption(unit)
            || unit->name.has_name
            )
            continue;

        // found a bugged unit which had invalid coordinates but was not in a cage.
        // marking it for slaughter didn't seem to have negative effects, but you never know...
        if(!isContainedInItem(unit) && !hasValidMapPos(unit))
            continue;

        w->PushUnit(unit);
    }
    return w;
}

WatchedRace * checkRaceStocksButcherFlag(int race)
{
    WatchedRace * w = new WatchedRace(true, race, default_fk, default_mk, default_fa, default_ma);

    for(size_t i=0; i<world->units.all.size(); i++)
    {
        df::unit * unit = world->units.all[i];

        if(unit->race != race)
            continue;

        if(    !isActive(unit)
            || isUndead(unit)
            || isMerchant(unit) // ignore merchants' draught animals
            || isForest(unit) // ignore merchants' caged animals
            || !isOwnCiv(unit)
            )
            continue;

        // found a bugged unit which had invalid coordinates but was not in a cage.
        // marking it for slaughter didn't seem to have negative effects, but you never know...
        if(!isContainedInItem(unit) && !hasValidMapPos(unit))
            continue;

        if(isMarkedForSlaughter(unit))
            w->PushUnit(unit);
    }
    return w;
}

void butcherRace(int race)
{
    for(size_t i=0; i<world->units.all.size(); i++)
    {
        df::unit * unit = world->units.all[i];

        if(unit->race != race)
            continue;

        if(    !isActive(unit)
            || isUndead(unit)
            || isMerchant(unit) // ignore merchants' draught animals
            || isForest(unit) // ignore merchants' caged animals
            || !isOwnCiv(unit)
            || !isTame(unit)
            || isWar(unit) // ignore war dogs etc
            || isHunter(unit) // ignore hunting dogs etc
            // ignore creatures in built cages which are defined as rooms to leave zoos alone
            // (TODO: better solution would be to allow some kind of slaughter cages which you can place near the butcher)
            || (isContainedInItem(unit) && isInBuiltCageRoom(unit))  // !!! see comments in isBuiltCageRoom()
            || isAvailableForAdoption(unit)
            || unit->name.has_name
            )
            continue;

        // found a bugged unit which had invalid coordinates but was not in a cage.
        // marking it for slaughter didn't seem to have negative effects, but you never know...
        if(!isContainedInItem(unit) && !hasValidMapPos(unit))
            continue;

        doMarkForSlaughter(unit);
    }
}

// remove butcher flag for all units of a given race
void unbutcherRace(int race)
{
    for(size_t i=0; i<world->units.all.size(); i++)
    {
        df::unit * unit = world->units.all[i];

        if(unit->race != race)
            continue;

        if(    !isActive(unit)
            || isUndead(unit)
            || !isMarkedForSlaughter(unit)
            )
            continue;

        if(!isContainedInItem(unit) && !hasValidMapPos(unit))
            continue;

        unit->flags2.bits.slaughter = 0;
    }
}


/////////////////////////////////////
// API functions to control autobutcher with a lua script

static bool autobutcher_isEnabled() { return enable_autobutcher; }
static bool autowatch_isEnabled() { return enable_autobutcher_autowatch; }

static unsigned autobutcher_getSleep(color_ostream &out)
{
    return sleep_autobutcher;
}

static void autobutcher_setSleep(color_ostream &out, unsigned ticks)
{
    sleep_autobutcher = ticks;
    if(config_autobutcher.isValid())
        config_autobutcher.ival(1) = sleep_autobutcher;
}

static void autobutcher_setEnabled(color_ostream &out, bool enable)
{
    if(enable)
    {
        enable_autobutcher = true;
        start_autobutcher(out);
        autoButcher(out, false);
    }
    else
    {
        enable_autobutcher = false;
        if(config_autobutcher.isValid())
            config_autobutcher.ival(0) = enable_autobutcher;
        out << "Autobutcher stopped." << endl;
    }

    if (enable)
        plugin_enable(out, true);
}

static void autowatch_setEnabled(color_ostream &out, bool enable)
{
    if(enable)
    {
        out << "Auto-adding to watchlist started." << endl;
        enable_autobutcher_autowatch = true;
        if(config_autobutcher.isValid())
            config_autobutcher.ival(2) = enable_autobutcher_autowatch;
    }
    else
    {
        out << "Auto-adding to watchlist stopped." << endl;
        enable_autobutcher_autowatch = false;
        if(config_autobutcher.isValid())
            config_autobutcher.ival(2) = enable_autobutcher_autowatch;
    }
}

// set all data for a watchlist race in one go
// if race is not already on watchlist it will be added
// params: (id, fk, mk, fa, ma, watched)
static void autobutcher_setWatchListRace(color_ostream &out, unsigned id, unsigned fk, unsigned mk, unsigned fa, unsigned ma, bool watched)
{
    int watched_index = getWatchedIndex(id);
    if(watched_index != -1)
    {
        out << "updating watchlist entry" << endl;
        WatchedRace * w = watched_races[watched_index];
        w->fk = fk;
        w->mk = mk;
        w->fa = fa;
        w->ma = ma;
        w->isWatched = watched;
        w->UpdateConfig(out);
    }
    else
    {
        out << "creating new watchlist entry" << endl;
        WatchedRace * w = new WatchedRace(watched, id, fk, mk, fa, ma); //default_fk, default_mk, default_fa, default_ma);
        w->UpdateConfig(out);
        watched_races.push_back(w);

        string announce;
        announce = "New race added to autobutcher watchlist: " + getRaceNamePluralById(w->raceId);
        Gui::showAnnouncement(announce, 2, false);
        autobutcher_sortWatchList(out);
    }
}

// remove entry from watchlist
static void autobutcher_removeFromWatchList(color_ostream &out, unsigned id)
{
    int watched_index = getWatchedIndex(id);
    if(watched_index != -1)
    {
        out << "updating watchlist entry" << endl;
        WatchedRace * w = watched_races[watched_index];
        w->RemoveConfig(out);
        watched_races.erase(watched_races.begin() + watched_index);
    }
}

// sort watchlist alphabetically
static void autobutcher_sortWatchList(color_ostream &out)
{
    sort(watched_races.begin(), watched_races.end(), compareRaceNames);
}

// set default target values for new races
static void autobutcher_setDefaultTargetNew(color_ostream &out, unsigned fk, unsigned mk, unsigned fa, unsigned ma)
{
    default_fk = fk;
    default_mk = mk;
    default_fa = fa;
    default_ma = ma;
    if(config_autobutcher.isValid())
    {
        config_autobutcher.ival(3) = default_fk;
        config_autobutcher.ival(4) = default_mk;
        config_autobutcher.ival(5) = default_fa;
        config_autobutcher.ival(6) = default_ma;
    }
}

// set default target values for ALL races (update watchlist and set new default)
static void autobutcher_setDefaultTargetAll(color_ostream &out, unsigned fk, unsigned mk, unsigned fa, unsigned ma)
{
    for(unsigned i=0; i<watched_races.size(); i++)
    {
        WatchedRace * w = watched_races[i];
        w->fk = fk;
        w->mk = mk;
        w->fa = fa;
        w->ma = ma;
        w->UpdateConfig(out);
    }
    autobutcher_setDefaultTargetNew(out, fk, mk, fa, ma);
}

static void autobutcher_butcherRace(color_ostream &out, unsigned id)
{
    butcherRace(id);
}

static void autobutcher_unbutcherRace(color_ostream &out, unsigned id)
{
    unbutcherRace(id);
}

// push autobutcher settings on lua stack
static int autobutcher_getSettings(lua_State *L)
{
    color_ostream &out = *Lua::GetOutput(L);
    lua_newtable(L);
    int ctable = lua_gettop(L);
    Lua::SetField(L, enable_autobutcher, ctable, "enable_autobutcher");
    Lua::SetField(L, enable_autobutcher_autowatch, ctable, "enable_autowatch");
    Lua::SetField(L, default_fk, ctable, "fk");
    Lua::SetField(L, default_mk, ctable, "mk");
    Lua::SetField(L, default_fa, ctable, "fa");
    Lua::SetField(L, default_ma, ctable, "ma");
    Lua::SetField(L, sleep_autobutcher, ctable, "sleep");
    return 1;
}

// push the watchlist vector as nested table on the lua stack
static int autobutcher_getWatchList(lua_State *L)
{
    color_ostream &out = *Lua::GetOutput(L);
    lua_newtable(L);

    for(size_t i=0; i<watched_races.size(); i++)
    {
        lua_newtable(L);
        int ctable = lua_gettop(L);
        WatchedRace * w = watched_races[i];
        Lua::SetField(L, w->raceId, ctable, "id");
        Lua::SetField(L, w->isWatched, ctable, "watched");
        Lua::SetField(L, getRaceNamePluralById(w->raceId), ctable, "name");
        Lua::SetField(L, w->fk, ctable, "fk");
        Lua::SetField(L, w->mk, ctable, "mk");
        Lua::SetField(L, w->fa, ctable, "fa");
        Lua::SetField(L, w->ma, ctable, "ma");

        int id = w->raceId;

        w = checkRaceStocksTotal(id);
        Lua::SetField(L, w->unit_ptr[fk_index].size(), ctable, "fk_total");
        Lua::SetField(L, w->unit_ptr[mk_index].size(), ctable, "mk_total");
        Lua::SetField(L, w->unit_ptr[fa_index].size(), ctable, "fa_total");
        Lua::SetField(L, w->unit_ptr[ma_index].size(), ctable, "ma_total");
        delete w;

        w = checkRaceStocksProtected(id);
        Lua::SetField(L, w->unit_ptr[fk_index].size(), ctable, "fk_protected");
        Lua::SetField(L, w->unit_ptr[mk_index].size(), ctable, "mk_protected");
        Lua::SetField(L, w->unit_ptr[fa_index].size(), ctable, "fa_protected");
        Lua::SetField(L, w->unit_ptr[ma_index].size(), ctable, "ma_protected");
        delete w;

        w = checkRaceStocksButcherable(id);
        Lua::SetField(L, w->unit_ptr[fk_index].size(), ctable, "fk_butcherable");
        Lua::SetField(L, w->unit_ptr[mk_index].size(), ctable, "mk_butcherable");
        Lua::SetField(L, w->unit_ptr[fa_index].size(), ctable, "fa_butcherable");
        Lua::SetField(L, w->unit_ptr[ma_index].size(), ctable, "ma_butcherable");
        delete w;

        w = checkRaceStocksButcherFlag(id);
        Lua::SetField(L, w->unit_ptr[fk_index].size(), ctable, "fk_butcherflag");
        Lua::SetField(L, w->unit_ptr[mk_index].size(), ctable, "mk_butcherflag");
        Lua::SetField(L, w->unit_ptr[fa_index].size(), ctable, "fa_butcherflag");
        Lua::SetField(L, w->unit_ptr[ma_index].size(), ctable, "ma_butcherflag");
        delete w;

        lua_rawseti(L, -2, i+1);
    }

    return 1;
}

DFHACK_PLUGIN_LUA_FUNCTIONS {
    DFHACK_LUA_FUNCTION(autobutcher_isEnabled),
    DFHACK_LUA_FUNCTION(autowatch_isEnabled),
    DFHACK_LUA_FUNCTION(autobutcher_setEnabled),
    DFHACK_LUA_FUNCTION(autowatch_setEnabled),
    DFHACK_LUA_FUNCTION(autobutcher_getSleep),
    DFHACK_LUA_FUNCTION(autobutcher_setSleep),
    DFHACK_LUA_FUNCTION(autobutcher_setWatchListRace),
    DFHACK_LUA_FUNCTION(autobutcher_setDefaultTargetNew),
    DFHACK_LUA_FUNCTION(autobutcher_setDefaultTargetAll),
    DFHACK_LUA_FUNCTION(autobutcher_butcherRace),
    DFHACK_LUA_FUNCTION(autobutcher_unbutcherRace),
    DFHACK_LUA_FUNCTION(autobutcher_removeFromWatchList),
    DFHACK_LUA_FUNCTION(autobutcher_sortWatchList),
    DFHACK_LUA_END
};

DFHACK_PLUGIN_LUA_COMMANDS {
    DFHACK_LUA_COMMAND(autobutcher_getSettings),
    DFHACK_LUA_COMMAND(autobutcher_getWatchList),
    DFHACK_LUA_END
};

// end lua API



//START zone filters

class zone_filter
{
public:
    zone_filter()
    {
        initialized = false;
    }

    void initialize(const df::ui_sidebar_mode &mode)
    {
        if (!initialized)
        {
            this->mode = mode;
            saved_ui_building_assign_type.clear();
            saved_ui_building_assign_units.clear();
            saved_ui_building_assign_items.clear();
            saved_ui_building_assign_is_marked.clear();
            saved_indexes.clear();

            for (size_t i = 0; i < ui_building_assign_units->size(); i++)
            {
                saved_ui_building_assign_type.push_back(ui_building_assign_type->at(i));
                saved_ui_building_assign_units.push_back(ui_building_assign_units->at(i));
                saved_ui_building_assign_items.push_back(ui_building_assign_items->at(i));
                saved_ui_building_assign_is_marked.push_back(ui_building_assign_is_marked->at(i));
            }

            search_string.clear();
            show_non_grazers = show_pastured = show_noncaged = show_male = show_female = show_other_zones = true;
            entry_mode = false;

            initialized = true;
        }
    }

    void deinitialize()
    {
        initialized = false;
    }

    void apply_filters()
    {
        if (saved_indexes.size() > 0)
        {
            bool list_has_been_sorted = (ui_building_assign_units->size() == reference_list.size()
                && *ui_building_assign_units != reference_list);

            for (size_t i = 0; i < saved_indexes.size(); i++)
            {
                int adjusted_item_index = i;
                if (list_has_been_sorted)
                {
                    for (size_t j = 0; j < ui_building_assign_units->size(); j++)
                    {
                        if (ui_building_assign_units->at(j) == reference_list[i])
                        {
                            adjusted_item_index = j;
                            break;
                        }
                    }
                }

                saved_ui_building_assign_is_marked[saved_indexes[i]] = ui_building_assign_is_marked->at(adjusted_item_index);
            }
        }

        string search_string_l = toLower(search_string);
        saved_indexes.clear();
        ui_building_assign_type->clear();
        ui_building_assign_is_marked->clear();
        ui_building_assign_units->clear();
        ui_building_assign_items->clear();

        for (size_t i = 0; i < saved_ui_building_assign_units.size(); i++)
        {
            df::unit *curr_unit = saved_ui_building_assign_units[i];

            if (!curr_unit)
                continue;

            if (!show_non_grazers && !isGrazer(curr_unit))
                continue;

            if (!show_pastured && isAssignedToZone(curr_unit))
                continue;

            if (!show_noncaged)
            {
                // must be in a container
                if(!isContainedInItem(curr_unit))
                    continue;
                // but exclude built cages (zoos, traps, ...) to avoid "accidental" pitting of creatures you'd prefer to keep
                if (isInBuiltCage(curr_unit))
                    continue;
            }

            if (!show_male && isMale(curr_unit))
                continue;

            if (!show_female && isFemale(curr_unit))
                continue;

            if (!search_string_l.empty())
            {
                string desc = Translation::TranslateName(
                    Units::getVisibleName(curr_unit), false);

                desc += Units::getProfessionName(curr_unit);
                desc = toLower(desc);

                if (desc.find(search_string_l) == string::npos)
                    continue;
            }

            ui_building_assign_type->push_back(saved_ui_building_assign_type[i]);
            ui_building_assign_units->push_back(curr_unit);
            ui_building_assign_items->push_back(saved_ui_building_assign_items[i]);
            ui_building_assign_is_marked->push_back(saved_ui_building_assign_is_marked[i]);

            saved_indexes.push_back(i); // Used to map filtered indexes back to original, if needed
        }

        reference_list = *ui_building_assign_units;
        *ui_building_item_cursor = 0;
    }

    bool handle_input(const set<df::interface_key> *input)
    {
        if (!initialized)
            return false;

        bool key_processed = true;

        if (entry_mode)
        {
            // Query typing mode

            if  (input->count(interface_key::SECONDSCROLL_UP) || input->count(interface_key::SECONDSCROLL_DOWN) ||
                input->count(interface_key::SECONDSCROLL_PAGEUP) || input->count(interface_key::SECONDSCROLL_PAGEDOWN))
            {
                // Arrow key pressed. Leave entry mode and allow screen to process key
                entry_mode = false;
                return false;
            }

            df::interface_key last_token = get_string_key(input);
            int charcode = Screen::keyToChar(last_token);
            if (charcode >= 32 && charcode <= 126)
            {
                // Standard character
                search_string += char(charcode);
                apply_filters();
            }
            else if (last_token == interface_key::STRING_A000)
            {
                // Backspace
                if (search_string.length() > 0)
                {
                    search_string.erase(search_string.length()-1);
                    apply_filters();
                }
            }
            else if (input->count(interface_key::SELECT) || input->count(interface_key::LEAVESCREEN))
            {
                // ENTER or ESC: leave typing mode
                entry_mode = false;
            }
        }
        // Not in query typing mode
        else if (input->count(interface_key::CUSTOM_SHIFT_G) &&
            (mode == ui_sidebar_mode::ZonesPenInfo || mode == ui_sidebar_mode::QueryBuilding))
        {
            show_non_grazers = !show_non_grazers;
            apply_filters();
        }
        else if (input->count(interface_key::CUSTOM_SHIFT_C) &&
            (mode == ui_sidebar_mode::ZonesPenInfo || mode == ui_sidebar_mode::ZonesPitInfo || mode == ui_sidebar_mode::QueryBuilding))
        {
            show_noncaged = !show_noncaged;
            apply_filters();
        }
        else if (input->count(interface_key::CUSTOM_SHIFT_P) &&
            (mode == ui_sidebar_mode::ZonesPenInfo || mode == ui_sidebar_mode::ZonesPitInfo || mode == ui_sidebar_mode::QueryBuilding))
        {
            show_pastured = !show_pastured;
            apply_filters();
        }
        else if (input->count(interface_key::CUSTOM_SHIFT_M) &&
            (mode == ui_sidebar_mode::ZonesPenInfo || mode == ui_sidebar_mode::ZonesPitInfo || mode == ui_sidebar_mode::QueryBuilding))
        {
            show_male = !show_male;
            apply_filters();
        }
        else if (input->count(interface_key::CUSTOM_SHIFT_F) &&
            (mode == ui_sidebar_mode::ZonesPenInfo || mode == ui_sidebar_mode::ZonesPitInfo || mode == ui_sidebar_mode::QueryBuilding))
        {
            show_female = !show_female;
            apply_filters();
        }
        else if (input->count(interface_key::CUSTOM_S))
        {
            // Hotkey pressed, enter typing mode
            entry_mode = true;
        }
        else if (input->count(interface_key::CUSTOM_SHIFT_S))
        {
            // Shift + Hotkey pressed, clear query
            search_string.clear();
            apply_filters();
        }
        else
        {
            // Not a key for us, pass it on to the screen
            key_processed = false;
        }

        return key_processed || entry_mode; // Only pass unrecognized keys down if not in typing mode
    }

    void do_render()
    {
        if (!initialized)
            return;

        int left_margin = gps->dimx - 30;
        int8_t a = (*ui_menu_width)[0];
        int8_t b = (*ui_menu_width)[1];
        if ((a == 1 && b > 1) || (a == 2 && b == 2))
            left_margin -= 24;

        int x = left_margin;
        int y = 24;

        OutputString(COLOR_BROWN, x, y, "DFHack Filtering");
        x = left_margin;
        ++y;
        OutputString(COLOR_LIGHTGREEN, x, y, "s");
        OutputString(COLOR_WHITE, x, y, ": Search");
        if (!search_string.empty() || entry_mode)
        {
            OutputString(COLOR_WHITE, x, y, ": ");
            if (!search_string.empty())
                OutputString(COLOR_WHITE, x, y, search_string);
            if (entry_mode)
                OutputString(COLOR_LIGHTGREEN, x, y, "_");
        }

        if (mode == ui_sidebar_mode::ZonesPenInfo || mode == ui_sidebar_mode::QueryBuilding)
        {
            x = left_margin;
            y += 2;
            OutputString(COLOR_LIGHTGREEN, x, y, "G");
            OutputString(COLOR_WHITE, x, y, ": ");
            OutputString((show_non_grazers) ? COLOR_WHITE : COLOR_GREY, x, y, "Non-Grazing");

            x = left_margin;
            ++y;
            OutputString(COLOR_LIGHTGREEN, x, y, "C");
            OutputString(COLOR_WHITE, x, y, ": ");
            OutputString((show_noncaged) ? COLOR_WHITE : COLOR_GREY, x, y, "Not Caged");

            x = left_margin;
            ++y;
            OutputString(COLOR_LIGHTGREEN, x, y, "P");
            OutputString(COLOR_WHITE, x, y, ": ");
            OutputString((show_pastured) ? COLOR_WHITE : COLOR_GREY, x, y, "Currently Pastured");

            x = left_margin;
            ++y;
            OutputString(COLOR_LIGHTGREEN, x, y, "F");
            OutputString(COLOR_WHITE, x, y, ": ");
            OutputString((show_female) ? COLOR_WHITE : COLOR_GREY, x, y, "Female");

            x = left_margin;
            ++y;
            OutputString(COLOR_LIGHTGREEN, x, y, "M");
            OutputString(COLOR_WHITE, x, y, ": ");
            OutputString((show_male) ? COLOR_WHITE : COLOR_GREY, x, y, "Male");
        }

        // pits don't have grazer filter because it seems pointless
        if (mode == ui_sidebar_mode::ZonesPitInfo)
        {
            x = left_margin;
            y += 2;
            OutputString(COLOR_LIGHTGREEN, x, y, "C");
            OutputString(COLOR_WHITE, x, y, ": ");
            OutputString((show_noncaged) ? COLOR_WHITE : COLOR_GREY, x, y, "Not Caged");

            x = left_margin;
            ++y;
            OutputString(COLOR_LIGHTGREEN, x, y, "P");
            OutputString(COLOR_WHITE, x, y, ": ");
            OutputString((show_pastured) ? COLOR_WHITE : COLOR_GREY, x, y, "Currently Pastured");

            x = left_margin;
            ++y;
            OutputString(COLOR_LIGHTGREEN, x, y, "F");
            OutputString(COLOR_WHITE, x, y, ": ");
            OutputString((show_female) ? COLOR_WHITE : COLOR_GREY, x, y, "Female");

            x = left_margin;
            ++y;
            OutputString(COLOR_LIGHTGREEN, x, y, "M");
            OutputString(COLOR_WHITE, x, y, ": ");
            OutputString((show_male) ? COLOR_WHITE : COLOR_GREY, x, y, "Male");
        }
    }

private:
    df::ui_sidebar_mode mode;
    string search_string;
    bool initialized;
    bool entry_mode;
    bool show_non_grazers, show_pastured, show_noncaged, show_male, show_female, show_other_zones;

    std::vector<int8_t> saved_ui_building_assign_type;
    std::vector<df::unit*> saved_ui_building_assign_units, reference_list;
    std::vector<df::item*> saved_ui_building_assign_items;
    std::vector<char> saved_ui_building_assign_is_marked;

    vector <int> saved_indexes;

};

struct zone_hook : public df::viewscreen_dwarfmodest
{
    typedef df::viewscreen_dwarfmodest interpose_base;
    static zone_filter filter;

    DEFINE_VMETHOD_INTERPOSE(void, feed, (set<df::interface_key> *input))
    {
        if (!filter.handle_input(input))
            INTERPOSE_NEXT(feed)(input);
    }

    DEFINE_VMETHOD_INTERPOSE(void, render, ())
    {
        if ( ( (ui->main.mode == ui_sidebar_mode::ZonesPenInfo || ui->main.mode == ui_sidebar_mode::ZonesPitInfo) &&
            ui_building_assign_type && ui_building_assign_units &&
            ui_building_assign_is_marked && ui_building_assign_items &&
            ui_building_assign_type->size() == ui_building_assign_units->size() &&
            ui_building_item_cursor)
            // allow mode QueryBuilding, but only for cages (bedrooms will crash DF with this code, chains don't work either etc)
            ||
            (   ui->main.mode == ui_sidebar_mode::QueryBuilding &&
                ui_building_in_assign && *ui_building_in_assign &&
                ui_building_assign_type && ui_building_assign_units &&
                ui_building_assign_type->size() == ui_building_assign_units->size() &&
                ui_building_assign_type->size() == ui_building_assign_items->size() &&
                ui_building_assign_type->size() == ui_building_assign_is_marked->size() &&
                ui_building_item_cursor &&
                world->selected_building && isCage(world->selected_building) )
            )
        {
            if (vector_get(*ui_building_assign_units, *ui_building_item_cursor))
                filter.initialize(ui->main.mode);
        }
        else
        {
            filter.deinitialize();
        }

        INTERPOSE_NEXT(render)();

        filter.do_render();

    }
};

zone_filter zone_hook::filter;

IMPLEMENT_VMETHOD_INTERPOSE(zone_hook, feed);
IMPLEMENT_VMETHOD_INTERPOSE(zone_hook, render);
//END zone filters

DFhackCExport command_result plugin_enable ( color_ostream &out, bool enable)
{
    if (!gps)
        return CR_FAILURE;

    if (enable != is_enabled)
    {
        if (!INTERPOSE_HOOK(zone_hook, feed).apply(enable) ||
            !INTERPOSE_HOOK(zone_hook, render).apply(enable))
            return CR_FAILURE;

        is_enabled = enable;
    }

    return CR_OK;
}

DFhackCExport command_result plugin_init ( color_ostream &out, std::vector <PluginCommand> &commands)
{
    commands.push_back(PluginCommand(
        "zone", "manage activity zones.",
        df_zone, false,
        zone_help.c_str()
        ));
    commands.push_back(PluginCommand(
        "autonestbox", "auto-assign nestbox zones.",
        df_autonestbox, false,
        autonestbox_help.c_str()
        ));
    commands.push_back(PluginCommand(
        "autobutcher", "auto-assign lifestock for butchering.",
        df_autobutcher, false,
        autobutcher_help.c_str()
        ));
    init_autobutcher(out);
    init_autonestbox(out);
    return CR_OK;
}

DFhackCExport command_result plugin_shutdown ( color_ostream &out )
{
    cleanup_autobutcher(out);
    cleanup_autonestbox(out);
    return CR_OK;
}