path: root/src/map/map.c

// Copyright (c) Athena Dev Teams - Licensed under GNU GPL
// For more information, see LICENCE in the main folder

#include "../common/cbasetypes.h"
#include "../common/core.h"
#include "../common/timer.h"
#include "../common/grfio.h"
#include "../common/malloc.h"
#include "../common/socket.h" // WFIFO*()
#include "../common/showmsg.h"
#include "../common/nullpo.h"
#include "../common/random.h"
#include "../common/strlib.h"
#include "../common/utils.h"

#include "map.h"
#include "path.h"
#include "chrif.h"
#include "clif.h"
#include "duel.h"
#include "intif.h"
#include "npc.h"
#include "pc.h"
#include "status.h"
#include "mob.h"
#include "npc.h" // npc_setcells(), npc_unsetcells()
#include "chat.h"
#include "itemdb.h"
#include "storage.h"
#include "skill.h"
#include "trade.h"
#include "party.h"
#include "unit.h"
#include "battle.h"
#include "battleground.h"
#include "quest.h"
#include "script.h"
#include "mapreg.h"
#include "guild.h"
#include "pet.h"
#include "homunculus.h"
#include "instance.h"
#include "mercenary.h"
#include "elemental.h"
#include "atcommand.h"
#include "log.h"
#include "mail.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <math.h>
#ifndef _WIN32
#include <unistd.h>
#endif

char default_codepage[32] = "";

int map_server_port = 3306;
char map_server_ip[32] = "127.0.0.1";
char map_server_id[32] = "ragnarok";
char map_server_pw[32] = "ragnarok";
char map_server_db[32] = "ragnarok";
Sql *mmysql_handle;

int db_use_sqldbs = 0;
char item_db_db[32] = "item_db";
char item_db2_db[32] = "item_db2";
char item_db_re_db[32] = "item_db_re";
char mob_db_db[32] = "mob_db";
char mob_db2_db[32] = "mob_db2";
char mob_skill_db_db[32] = "mob_skill_db";
char mob_skill_db2_db[32] = "mob_skill_db2";

// log database
char log_db_ip[32] = "127.0.0.1";
int log_db_port = 3306;
char log_db_id[32] = "ragnarok";
char log_db_pw[32] = "ragnarok";
char log_db_db[32] = "log";
Sql *logmysql_handle;

// This param using for sending mainchat
// messages like whispers to this nick. [LuzZza]
char main_chat_nick[16] = "Main";

char *INTER_CONF_NAME;
char *LOG_CONF_NAME;
char *MAP_CONF_NAME;
char *BATTLE_CONF_FILENAME;
char *ATCOMMAND_CONF_FILENAME;
char *SCRIPT_CONF_NAME;
char *MSG_CONF_NAME;
char *GRF_PATH_FILENAME;

// DBMap declaartion
static DBMap *id_db=NULL; // int id -> struct block_list*
static DBMap *pc_db=NULL; // int id -> struct map_session_data*
static DBMap *mobid_db=NULL; // int id -> struct mob_data*
static DBMap *bossid_db=NULL; // int id -> struct mob_data* (MVP db)
static DBMap *map_db=NULL; // unsigned int mapindex -> struct map_data*
static DBMap *nick_db=NULL; // int char_id -> struct charid2nick* (requested names of offline characters)
static DBMap *charid_db=NULL; // int char_id -> struct map_session_data*
static DBMap *regen_db=NULL; // int id -> struct block_list* (status_natural_heal processing)

static int map_users=0;

#define BLOCK_SIZE 8
#define block_free_max 1048576
struct block_list *block_free[block_free_max];
static int block_free_count = 0, block_free_lock = 0;

#define BL_LIST_MAX 1048576
static struct block_list *bl_list[BL_LIST_MAX];
static int bl_list_count = 0;

struct map_data map[MAX_MAP_PER_SERVER];
int map_num = 0;
int map_port=0;

int autosave_interval = DEFAULT_AUTOSAVE_INTERVAL;
int minsave_interval = 100;
int save_settings = 0xFFFF;
int agit_flag = 0;
int agit2_flag = 0;
int night_flag = 0; // 0=day, 1=night [Yor]

struct charid_request {
    struct charid_request *next;
    int charid;// who want to be notified of the nick
};
struct charid2nick {
    char nick[NAME_LENGTH];
    struct charid_request *requests;// requests of notification on this nick
};

// This is the main header found at the very beginning of the map cache
struct map_cache_main_header {
    uint32 file_size;
    uint16 map_count;
};

// This is the header appended before every compressed map cells info in the map cache
struct map_cache_map_info {
    char name[MAP_NAME_LENGTH];
    int16 xs;
    int16 ys;
    int32 len;
};

char db_path[256] = "db";
char motd_txt[256] = "conf/motd.txt";
char help_txt[256] = "conf/help.txt";
char help2_txt[256] = "conf/help2.txt";
char charhelp_txt[256] = "conf/charhelp.txt";

char wisp_server_name[NAME_LENGTH] = "Server"; // can be modified in char-server configuration file

int console = 0;
int enable_spy = 0; //To enable/disable @spy commands, which consume too much cpu time when sending packets. [Skotlex]
int enable_grf = 0; //To enable/disable reading maps from GRF files, bypassing mapcache [blackhole89]

/*==========================================
 * server player count (of all mapservers)
 *------------------------------------------*/
void map_setusers(int users)
{
    map_users = users;
}

int map_getusers(void)
{
    return map_users;
}

/*==========================================
 * server player count (this mapserver only)
 *------------------------------------------*/
int map_usercount(void)
{
    return pc_db->size(pc_db);
}


/*==========================================
 * Attempt to free a map blocklist
 *------------------------------------------*/
int map_freeblock(struct block_list *bl)
{
    nullpo_retr(block_free_lock, bl);
    if (block_free_lock == 0 || block_free_count >= block_free_max) {
        aFree(bl);
        bl = NULL;
        if (block_free_count >= block_free_max)
            ShowWarning("map_freeblock: too many free block! %d %d\n", block_free_count, block_free_lock);
    } else
        block_free[block_free_count++] = bl;

    return block_free_lock;
}
/*==========================================
 * Lock blocklist, (prevent map_freeblock usage)
 *------------------------------------------*/
int map_freeblock_lock(void)
{
    return ++block_free_lock;
}

/*==========================================
 * Remove the lock on map_bl
 *------------------------------------------*/
int map_freeblock_unlock(void)
{
    if ((--block_free_lock) == 0) {
        int i;
        for (i = 0; i < block_free_count; i++) {
            aFree(block_free[i]);
            block_free[i] = NULL;
        }
        block_free_count = 0;
    } else if (block_free_lock < 0) {
        ShowError("map_freeblock_unlock: lock count < 0 !\n");
        block_free_lock = 0;
    }

    return block_free_lock;
}

// Timer function to check if there some remaining lock and remove them if so.
// Called each 1s
int map_freeblock_timer(int tid, unsigned int tick, int id, intptr_t data)
{
    if (block_free_lock > 0) {
        ShowError("map_freeblock_timer: block_free_lock(%d) is invalid.\n", block_free_lock);
        block_free_lock = 1;
        map_freeblock_unlock();
    }

    return 0;
}

//
// blocklist
//
/*==========================================
 * Handling of map_bl[]
 * The adresse of bl_heal is set in bl->prev
 *------------------------------------------*/
static struct block_list bl_head;

#ifdef CELL_NOSTACK
/*==========================================
 * These pair of functions update the counter of how many objects
 * lie on a tile.
 *------------------------------------------*/
static void map_addblcell(struct block_list *bl)
{
    if (bl->m<0 || bl->x<0 || bl->x>=map[bl->m].xs || bl->y<0 || bl->y>=map[bl->m].ys || !(bl->type&BL_CHAR))
        return;
    map[bl->m].cell[bl->x+bl->y*map[bl->m].xs].cell_bl++;
    return;
}

static void map_delblcell(struct block_list *bl)
{
    if (bl->m <0 || bl->x<0 || bl->x>=map[bl->m].xs || bl->y<0 || bl->y>=map[bl->m].ys || !(bl->type&BL_CHAR))
        return;
    map[bl->m].cell[bl->x+bl->y*map[bl->m].xs].cell_bl--;
}
#endif

/*==========================================
 * Adds a block to the map.
 * Returns 0 on success, 1 on failure (illegal coordinates).
 *------------------------------------------*/
int map_addblock(struct block_list *bl)
{
    int m, x, y, pos;

    nullpo_ret(bl);

    if (bl->prev != NULL) {
        ShowError("map_addblock: bl->prev != NULL\n");
        return 1;
    }

    m = bl->m;
    x = bl->x;
    y = bl->y;
    if (m < 0 || m >= map_num) {
        ShowError("map_addblock: invalid map id (%d), only %d are loaded.\n", m, map_num);
        return 1;
    }
    if (x < 0 || x >= map[m].xs || y < 0 || y >= map[m].ys) {
        ShowError("map_addblock: out-of-bounds coordinates (\"%s\",%d,%d), map is %dx%d\n", map[m].name, x, y, map[m].xs, map[m].ys);
        return 1;
    }

    pos = x/BLOCK_SIZE+(y/BLOCK_SIZE)*map[m].bxs;

    if (bl->type == BL_MOB) {
        bl->next = map[m].block_mob[pos];
        bl->prev = &bl_head;
        if (bl->next) bl->next->prev = bl;
        map[m].block_mob[pos] = bl;
    } else {
        bl->next = map[m].block[pos];
        bl->prev = &bl_head;
        if (bl->next) bl->next->prev = bl;
        map[m].block[pos] = bl;
    }

#ifdef CELL_NOSTACK
    map_addblcell(bl);
#endif

    return 0;
}

/*==========================================
 * Removes a block from the map.
 *------------------------------------------*/
int map_delblock(struct block_list *bl)
{
    int pos;
    nullpo_ret(bl);

    // blocklist (2ways chainlist)
    if (bl->prev == NULL) {
        if (bl->next != NULL) {
            // can't delete block (already at the begining of the chain)
            ShowError("map_delblock error : bl->next!=NULL\n");
        }
        return 0;
    }

#ifdef CELL_NOSTACK
    map_delblcell(bl);
#endif

    pos = bl->x/BLOCK_SIZE+(bl->y/BLOCK_SIZE)*map[bl->m].bxs;

    if (bl->next)
        bl->next->prev = bl->prev;
    if (bl->prev == &bl_head) {
        //Since the head of the list, update the block_list map of []
        if (bl->type == BL_MOB) {
            map[bl->m].block_mob[pos] = bl->next;
        } else {
            map[bl->m].block[pos] = bl->next;
        }
    } else {
        bl->prev->next = bl->next;
    }
    bl->next = NULL;
    bl->prev = NULL;

    return 0;
}

/*==========================================
 * Moves a block a x/y target position. [Skotlex]
 * Pass flag as 1 to prevent doing skill_unit_move checks
 * (which are executed by default on BL_CHAR types)
 *------------------------------------------*/
int map_moveblock(struct block_list *bl, int x1, int y1, unsigned int tick)
{
    int x0 = bl->x, y0 = bl->y;
    struct status_change *sc = NULL;
    int moveblock = (x0/BLOCK_SIZE != x1/BLOCK_SIZE || y0/BLOCK_SIZE != y1/BLOCK_SIZE);

    if (!bl->prev) {
        //Block not in map, just update coordinates, but do naught else.
        bl->x = x1;
        bl->y = y1;
        return 0;
    }

    //TODO: Perhaps some outs of bounds checking should be placed here?
    if (bl->type&BL_CHAR) {
        sc = status_get_sc(bl);

        skill_unit_move(bl,tick,2);
        status_change_end(bl, SC_CLOSECONFINE, INVALID_TIMER);
        status_change_end(bl, SC_CLOSECONFINE2, INVALID_TIMER);
        //      status_change_end(bl, SC_BLADESTOP, INVALID_TIMER); //Won't stop when you are knocked away, go figure...
        status_change_end(bl, SC_TATAMIGAESHI, INVALID_TIMER);
        status_change_end(bl, SC_MAGICROD, INVALID_TIMER);
        if (sc->data[SC_PROPERTYWALK] &&
            sc->data[SC_PROPERTYWALK]->val3 >= skill_get_maxcount(sc->data[SC_PROPERTYWALK]->val1,sc->data[SC_PROPERTYWALK]->val2))
            status_change_end(bl,SC_PROPERTYWALK,INVALID_TIMER);
    } else if (bl->type == BL_NPC)
        npc_unsetcells((TBL_NPC *)bl);

    if (moveblock) map_delblock(bl);
#ifdef CELL_NOSTACK
    else map_delblcell(bl);
#endif
    bl->x = x1;
    bl->y = y1;
    if (moveblock) map_addblock(bl);
#ifdef CELL_NOSTACK
    else map_addblcell(bl);
#endif

    if (bl->type&BL_CHAR) {

        skill_unit_move(bl,tick,3);

        if (bl->type == BL_PC && ((TBL_PC *)bl)->shadowform_id) {//Shadow Form Target Moving
            struct block_list *d_bl;
            if ((d_bl = map_id2bl(((TBL_PC *)bl)->shadowform_id)) == NULL || bl->m != d_bl->m || !check_distance_bl(bl,d_bl,10)) {
                if (d_bl)
                    status_change_end(d_bl,SC__SHADOWFORM,INVALID_TIMER);
                ((TBL_PC *)bl)->shadowform_id = 0;
            }
        }

        if (sc && sc->count) {
            if (sc->data[SC_DANCING])
                skill_unit_move_unit_group(skill_id2group(sc->data[SC_DANCING]->val2), bl->m, x1-x0, y1-y0);
            else {
                if (sc->data[SC_CLOAKING])
                    skill_check_cloaking(bl, sc->data[SC_CLOAKING]);
                if (sc->data[SC_WARM])
                    skill_unit_move_unit_group(skill_id2group(sc->data[SC_WARM]->val4), bl->m, x1-x0, y1-y0);
                if (sc->data[SC_BANDING])
                    skill_unit_move_unit_group(skill_id2group(sc->data[SC_BANDING]->val4), bl->m, x1-x0, y1-y0);

                if (sc->data[SC_NEUTRALBARRIER_MASTER])
                    skill_unit_move_unit_group(skill_id2group(sc->data[SC_NEUTRALBARRIER_MASTER]->val2), bl->m, x1-x0, y1-y0);
                else if (sc->data[SC_STEALTHFIELD_MASTER])
                    skill_unit_move_unit_group(skill_id2group(sc->data[SC_STEALTHFIELD_MASTER]->val2), bl->m, x1-x0, y1-y0);

                if (sc->data[SC__SHADOWFORM]) { //Shadow Form Caster Moving
                    struct block_list *d_bl;
                    if ((d_bl = map_id2bl(sc->data[SC__SHADOWFORM]->val2)) == NULL || bl->m != d_bl->m || !check_distance_bl(bl,d_bl,10))
                        status_change_end(bl,SC__SHADOWFORM,INVALID_TIMER);
                }

                if (sc->data[SC_PROPERTYWALK]
                    && sc->data[SC_PROPERTYWALK]->val3 < skill_get_maxcount(sc->data[SC_PROPERTYWALK]->val1,sc->data[SC_PROPERTYWALK]->val2)
                    && map_find_skill_unit_oncell(bl,bl->x,bl->y,SO_ELECTRICWALK,NULL,0) == NULL
                    && map_find_skill_unit_oncell(bl,bl->x,bl->y,SO_FIREWALK,NULL,0) == NULL
                    && skill_unitsetting(bl,sc->data[SC_PROPERTYWALK]->val1,sc->data[SC_PROPERTYWALK]->val2,x0, y0,0)) {
                    sc->data[SC_PROPERTYWALK]->val3++;
                }


            }
            /* Guild Aura Moving */
            if (bl->type == BL_PC && ((TBL_PC *)bl)->state.gmaster_flag) {
                if (sc->data[SC_LEADERSHIP])
                    skill_unit_move_unit_group(skill_id2group(sc->data[SC_LEADERSHIP]->val4), bl->m, x1-x0, y1-y0);
                if (sc->data[SC_GLORYWOUNDS])
                    skill_unit_move_unit_group(skill_id2group(sc->data[SC_GLORYWOUNDS]->val4), bl->m, x1-x0, y1-y0);
                if (sc->data[SC_SOULCOLD])
                    skill_unit_move_unit_group(skill_id2group(sc->data[SC_SOULCOLD]->val4), bl->m, x1-x0, y1-y0);
                if (sc->data[SC_HAWKEYES])
                    skill_unit_move_unit_group(skill_id2group(sc->data[SC_HAWKEYES]->val4), bl->m, x1-x0, y1-y0);
            }
        }
    } else if (bl->type == BL_NPC)
        npc_setcells((TBL_NPC *)bl);

    return 0;
}

/*==========================================
 * Counts specified number of objects on given cell.
 *------------------------------------------*/
int map_count_oncell(int m, int x, int y, int type)
{
    int bx,by;
    struct block_list *bl;
    int count = 0;

    if (x < 0 || y < 0 || (x >= map[m].xs) || (y >= map[m].ys))
        return 0;

    bx = x/BLOCK_SIZE;
    by = y/BLOCK_SIZE;

    if (type&~BL_MOB)
        for (bl = map[m].block[bx+by*map[m].bxs] ; bl != NULL ; bl = bl->next)
            if (bl->x == x && bl->y == y && bl->type&type)
                count++;

    if (type&BL_MOB)
        for (bl = map[m].block_mob[bx+by*map[m].bxs] ; bl != NULL ; bl = bl->next)
            if (bl->x == x && bl->y == y)
                count++;

    return count;
}
/*
 * Looks for a skill unit on a given cell
 * flag&1: runs battle_check_target check based on unit->group->target_flag
 */
struct skill_unit *map_find_skill_unit_oncell(struct block_list *target,int x,int y,int skill_id,struct skill_unit *out_unit, int flag) {
    int m,bx,by;
    struct block_list *bl;
    struct skill_unit *unit;
    m = target->m;

    if (x < 0 || y < 0 || (x >= map[m].xs) || (y >= map[m].ys))
        return NULL;

    bx = x/BLOCK_SIZE;
    by = y/BLOCK_SIZE;

    for (bl = map[m].block[bx+by *map[m].bxs] ; bl != NULL ; bl = bl->next) {
        if (bl->x != x || bl->y != y || bl->type != BL_SKILL)
            continue;

        unit = (struct skill_unit *) bl;
        if (unit == out_unit || !unit->alive || !unit->group || unit->group->skill_id != skill_id)
            continue;
        if (!(flag&1) || battle_check_target(&unit->bl,target,unit->group->target_flag) > 0)
            return unit;
    }
    return NULL;
}

/*==========================================
 * Adapted from foreachinarea for an easier invocation. [Skotlex]
 *------------------------------------------*/
int map_foreachinrange(int (*func)(struct block_list *,va_list), struct block_list *center, int range, int type, ...)
{
    int bx, by, m;
    int returnCount = 0;    //total sum of returned values of func() [Skotlex]
    struct block_list *bl;
    int blockcount = bl_list_count, i;
    int x0, x1, y0, y1;
    va_list ap;

    m = center->m;
    x0 = max(center->x - range, 0);
    y0 = max(center->y - range, 0);
    x1 = min(center->x + range, map[ m ].xs - 1);
    y1 = min(center->y + range, map[ m ].ys - 1);

    if (type&~BL_MOB)
        for (by = y0 / BLOCK_SIZE; by <= y1 / BLOCK_SIZE; by++) {
            for (bx = x0 / BLOCK_SIZE; bx <= x1 / BLOCK_SIZE; bx++) {
                for (bl = map[m].block[ bx + by * map[ m ].bxs ]; bl != NULL; bl = bl->next) {
                    if (bl->type&type
                        && bl->x >= x0 && bl->x <= x1 && bl->y >= y0 && bl->y <= y1
#ifdef CIRCULAR_AREA
                        && check_distance_bl(center, bl, range)
#endif
                        && bl_list_count < BL_LIST_MAX)
                        bl_list[ bl_list_count++ ] = bl;
                }
            }
        }

    if (type&BL_MOB)
        for (by = y0 / BLOCK_SIZE; by <= y1 / BLOCK_SIZE; by++) {
            for (bx=x0/BLOCK_SIZE; bx<=x1/BLOCK_SIZE; bx++) {
                for (bl = map[ m ].block_mob[ bx + by * map[ m ].bxs ]; bl != NULL; bl = bl->next) {
                    if (bl->x >= x0 && bl->x <= x1 && bl->y >= y0 && bl->y <= y1
#ifdef CIRCULAR_AREA
                        && check_distance_bl(center, bl, range)
#endif
                        && bl_list_count < BL_LIST_MAX)
                        bl_list[ bl_list_count++ ] = bl;
                }
            }
        }

    if (bl_list_count >= BL_LIST_MAX)
        ShowWarning("map_foreachinrange: block count too many!\n");

    map_freeblock_lock();

    for (i = blockcount; i < bl_list_count; i++)
        if (bl_list[ i ]->prev) {  //func() may delete this bl_list[] slot, checking for prev ensures it wasnt queued for deletion.
            va_start(ap, type);
            returnCount += func(bl_list[ i ], ap);
            va_end(ap);
        }

    map_freeblock_unlock();

    bl_list_count = blockcount;
    return returnCount; //[Skotlex]
}

/*==========================================
 * Same as foreachinrange, but there must be a shoot-able range between center and target to be counted in. [Skotlex]
 *------------------------------------------*/
int map_foreachinshootrange(int (*func)(struct block_list *,va_list),struct block_list *center, int range, int type,...)
{
    int bx, by, m;
    int returnCount = 0;    //total sum of returned values of func() [Skotlex]
    struct block_list *bl;
    int blockcount = bl_list_count, i;
    int x0, x1, y0, y1;
    va_list ap;

    m = center->m;
    if (m < 0)
        return 0;

    x0 = max(center->x-range, 0);
    y0 = max(center->y-range, 0);
    x1 = min(center->x+range, map[m].xs-1);
    y1 = min(center->y+range, map[m].ys-1);

    if (type&~BL_MOB)
        for (by = y0 / BLOCK_SIZE; by <= y1 / BLOCK_SIZE; by++) {
            for (bx = x0 / BLOCK_SIZE; bx <= x1 / BLOCK_SIZE; bx++) {
                for (bl = map[ m ].block[ bx + by * map[ m ].bxs ]; bl != NULL; bl = bl->next) {
                    if (bl->type&type
                        && bl->x >= x0 && bl->x <= x1 && bl->y >= y0 && bl->y <= y1
#ifdef CIRCULAR_AREA
                        && check_distance_bl(center, bl, range)
#endif
                        && path_search_long(NULL, center->m, center->x, center->y, bl->x, bl->y, CELL_CHKWALL)
                        && bl_list_count < BL_LIST_MAX)
                        bl_list[ bl_list_count++ ] = bl;
                }
            }
        }
    if (type&BL_MOB)
        for (by = y0 / BLOCK_SIZE; by <= y1 / BLOCK_SIZE; by++) {
            for (bx=x0 / BLOCK_SIZE; bx <= x1 / BLOCK_SIZE; bx++) {
                for (bl = map[ m ].block_mob[ bx + by * map[ m ].bxs ]; bl != NULL; bl = bl->next) {
                    if (bl->x >= x0 && bl->x <= x1 && bl->y >= y0 && bl->y <= y1
#ifdef CIRCULAR_AREA
                        && check_distance_bl(center, bl, range)
#endif
                        && path_search_long(NULL, center->m, center->x, center->y, bl->x, bl->y, CELL_CHKWALL)
                        && bl_list_count < BL_LIST_MAX)
                        bl_list[ bl_list_count++ ] = bl;
                }
            }
        }

    if (bl_list_count >= BL_LIST_MAX)
        ShowWarning("map_foreachinrange: block count too many!\n");

    map_freeblock_lock();

    for (i = blockcount; i < bl_list_count; i++)
        if (bl_list[ i ]->prev) {  //func() may delete this bl_list[] slot, checking for prev ensures it wasnt queued for deletion.
            va_start(ap, type);
            returnCount += func(bl_list[ i ], ap);
            va_end(ap);
        }

    map_freeblock_unlock();

    bl_list_count = blockcount;
    return returnCount; //[Skotlex]
}

/*==========================================
 * range = map m (x0,y0)-(x1,y1)
 * Apply *func with ... arguments for the range.
 * @type = BL_PC/BL_MOB etc..
 *------------------------------------------*/
int map_foreachinarea(int (*func)(struct block_list *,va_list), int m, int x0, int y0, int x1, int y1, int type, ...)
{
    int bx, by;
    int returnCount = 0;    //total sum of returned values of func() [Skotlex]
    struct block_list *bl;
    int blockcount = bl_list_count, i;
    va_list ap;

    if (m < 0)
        return 0;

    if (x1 < x0)
        swap(x0, x1);
    if (y1 < y0)
        swap(y0, y1);

    x0 = max(x0, 0);
    y0 = max(y0, 0);
    x1 = min(x1, map[ m ].xs - 1);
    y1 = min(y1, map[ m ].ys - 1);
    if (type&~BL_MOB)
        for (by = y0 / BLOCK_SIZE; by <= y1 / BLOCK_SIZE; by++)
            for (bx = x0 / BLOCK_SIZE; bx <= x1 / BLOCK_SIZE; bx++)
                for (bl = map[ m ].block[ bx + by * map[ m ].bxs ]; bl != NULL; bl = bl->next)
                    if (bl->type&type && bl->x >= x0 && bl->x <= x1 && bl->y >= y0 && bl->y <= y1 && bl_list_count < BL_LIST_MAX)
                        bl_list[ bl_list_count++ ] = bl;

    if (type&BL_MOB)
        for (by = y0 / BLOCK_SIZE; by <= y1 / BLOCK_SIZE; by++)
            for (bx = x0 / BLOCK_SIZE; bx <= x1 / BLOCK_SIZE; bx++)
                for (bl = map[ m ].block_mob[ bx + by * map[ m ].bxs ]; bl != NULL; bl = bl->next)
                    if (bl->x >= x0 && bl->x <= x1 && bl->y >= y0 && bl->y <= y1 && bl_list_count < BL_LIST_MAX)
                        bl_list[ bl_list_count++ ] = bl;

    if (bl_list_count >= BL_LIST_MAX)
        ShowWarning("map_foreachinarea: block count too many!\n");

    map_freeblock_lock();

    for (i = blockcount; i < bl_list_count; i++)
        if (bl_list[ i ]->prev) {  //func() may delete this bl_list[] slot, checking for prev ensures it wasnt queued for deletion.
            va_start(ap, type);
            returnCount += func(bl_list[ i ], ap);
            va_end(ap);
        }

    map_freeblock_unlock();

    bl_list_count = blockcount;
    return returnCount; //[Skotlex]
}
/*==========================================
 * Adapted from forcountinarea for an easier invocation. [pakpil]
 *------------------------------------------*/
int map_forcountinrange(int (*func)(struct block_list *,va_list), struct block_list *center, int range, int count, int type, ...)
{
    int bx, by, m;
    int returnCount = 0;    //total sum of returned values of func() [Skotlex]
    struct block_list *bl;
    int blockcount = bl_list_count, i;
    int x0, x1, y0, y1;
    va_list ap;

    m = center->m;
    x0 = max(center->x - range, 0);
    y0 = max(center->y - range, 0);
    x1 = min(center->x + range, map[ m ].xs - 1);
    y1 = min(center->y + range, map[ m ].ys - 1);

    if (type&~BL_MOB)
        for (by = y0 / BLOCK_SIZE; by <= y1 / BLOCK_SIZE; by++) {
            for (bx = x0 / BLOCK_SIZE; bx <= x1 / BLOCK_SIZE; bx++) {
                for (bl = map[ m ].block[ bx + by * map[ m ].bxs ]; bl != NULL; bl = bl->next) {
                    if (bl->type&type
                        && bl->x >= x0 && bl->x <= x1 && bl->y >= y0 && bl->y <= y1
#ifdef CIRCULAR_AREA
                        && check_distance_bl(center, bl, range)
#endif
                        && bl_list_count < BL_LIST_MAX)
                        bl_list[ bl_list_count++ ] = bl;
                }
            }
        }
    if (type&BL_MOB)
        for (by = y0 / BLOCK_SIZE; by <= y1 / BLOCK_SIZE; by++) {
            for (bx = x0 / BLOCK_SIZE; bx <= x1 / BLOCK_SIZE; bx++) {
                for (bl = map[ m ].block_mob[ bx + by * map[ m ].bxs ]; bl != NULL; bl = bl->next) {
                    if (bl->x >= x0 && bl->x <= x1 && bl->y >= y0 && bl->y <= y1
#ifdef CIRCULAR_AREA
                        && check_distance_bl(center, bl, range)
#endif
                        && bl_list_count < BL_LIST_MAX)
                        bl_list[ bl_list_count++ ] = bl;
                }
            }
        }

    if (bl_list_count >= BL_LIST_MAX)
        ShowWarning("map_forcountinrange: block count too many!\n");

    map_freeblock_lock();

    for (i = blockcount; i < bl_list_count; i++)
        if (bl_list[ i ]->prev) {  //func() may delete this bl_list[] slot, checking for prev ensures it wasnt queued for deletion.
            va_start(ap, type);
            returnCount += func(bl_list[ i ], ap);
            va_end(ap);
            if (count && returnCount >= count)
                break;
        }

    map_freeblock_unlock();

    bl_list_count = blockcount;
    return returnCount; //[Skotlex]
}
int map_forcountinarea(int (*func)(struct block_list *,va_list), int m, int x0, int y0, int x1, int y1, int count, int type, ...)
{
    int bx, by;
    int returnCount = 0;    //total sum of returned values of func() [Skotlex]
    struct block_list *bl;
    int blockcount = bl_list_count, i;
    va_list ap;

    if (m < 0)
        return 0;

    if (x1 < x0)
        swap(x0, x1);
    if (y1 < y0)
        swap(y0, y1);

    x0 = max(x0, 0);
    y0 = max(y0, 0);
    x1 = min(x1, map[ m ].xs - 1);
    y1 = min(y1, map[ m ].ys - 1);

    if (type&~BL_MOB)
        for (by = y0 / BLOCK_SIZE; by <= y1 / BLOCK_SIZE; by++)
            for (bx = x0 / BLOCK_SIZE; bx <= x1 / BLOCK_SIZE; bx++)
                for (bl = map[ m ].block[ bx + by * map[ m ].bxs ]; bl != NULL; bl = bl->next)
                    if (bl->type&type && bl->x >= x0 && bl->x <= x1 && bl->y >= y0 && bl->y <= y1 && bl_list_count < BL_LIST_MAX)
                        bl_list[ bl_list_count++ ] = bl;

    if (type&BL_MOB)
        for (by = y0 / BLOCK_SIZE; by <= y1 / BLOCK_SIZE; by++)
            for (bx = x0 / BLOCK_SIZE; bx <= x1 / BLOCK_SIZE; bx++)
                for (bl = map[ m ].block_mob[ bx + by * map[ m ].bxs ]; bl != NULL; bl = bl->next)
                    if (bl->x >= x0 && bl->x <= x1 && bl->y >= y0 && bl->y <= y1 && bl_list_count < BL_LIST_MAX)
                        bl_list[ bl_list_count++ ] = bl;

    if (bl_list_count >= BL_LIST_MAX)
        ShowWarning("map_foreachinarea: block count too many!\n");

    map_freeblock_lock();

    for (i = blockcount; i < bl_list_count; i++)
        if (bl_list[ i ]->prev) { //func() may delete this bl_list[] slot, checking for prev ensures it wasnt queued for deletion.
            va_start(ap, type);
            returnCount += func(bl_list[ i ], ap);
            va_end(ap);
            if (count && returnCount >= count)
                break;
        }

    map_freeblock_unlock();

    bl_list_count = blockcount;
    return returnCount; //[Skotlex]
}

/*==========================================
 * For what I get
 * Move bl and do func* with va_list while moving.
 * Mouvement is set by dx dy wich are distance in x and y
 *------------------------------------------*/
int map_foreachinmovearea(int (*func)(struct block_list *,va_list), struct block_list *center, int range, int dx, int dy, int type, ...)
{
    int bx, by, m;
    int returnCount = 0;  //total sum of returned values of func() [Skotlex]
    struct block_list *bl;
    int blockcount = bl_list_count, i;
    int x0, x1, y0, y1;
    va_list ap;

    if (!range) return 0;
    if (!dx && !dy) return 0;   //No movement.

    m = center->m;

    x0 = center->x - range;
    x1 = center->x + range;
    y0 = center->y - range;
    y1 = center->y + range;

    if (x1 < x0)
        swap(x0, x1);
    if (y1 < y0)
        swap(y0, y1);

    if (dx == 0 || dy == 0) {
        //Movement along one axis only.
        if (dx == 0) {
            if (dy < 0)  //Moving south
                y0 = y1 + dy + 1;
            else //North
                y1 = y0 + dy - 1;
        } else { //dy == 0
            if (dx < 0)  //West
                x0 = x1 + dx + 1;
            else //East
                x1 = x0 + dx - 1;
        }

        x0 = max(x0, 0);
        y0 = max(y0, 0);
        x1 = min(x1, map[ m ].xs - 1);
        y1 = min(y1, map[ m ].ys - 1);

        for (by = y0 / BLOCK_SIZE; by <= y1 / BLOCK_SIZE; by++) {
            for (bx = x0 / BLOCK_SIZE; bx <= x1 / BLOCK_SIZE; bx++) {
                if (type&~BL_MOB) {
                    for (bl = map[m].block[ bx + by * map[ m ].bxs ]; bl != NULL; bl = bl->next) {
                        if (bl->type&type &&
                            bl->x >= x0 && bl->x <= x1 &&
                            bl->y >= y0 && bl->y <= y1 &&
                            bl_list_count < BL_LIST_MAX)
                            bl_list[ bl_list_count++ ] = bl;
                    }
                }
                if (type&BL_MOB) {
                    for (bl = map[ m ].block_mob[ bx + by * map[ m ].bxs ]; bl != NULL; bl = bl->next) {
                        if (bl->x >= x0 && bl->x <= x1 &&
                            bl->y >= y0 && bl->y <= y1 &&
                            bl_list_count < BL_LIST_MAX)
                            bl_list[ bl_list_count++ ] = bl;
                    }
                }
            }
        }
    } else { // Diagonal movement

        x0 = max(x0, 0);
        y0 = max(y0, 0);
        x1 = min(x1, map[ m ].xs - 1);
        y1 = min(y1, map[ m ].ys - 1);

        for (by = y0 / BLOCK_SIZE; by <= y1 / BLOCK_SIZE; by++) {
            for (bx = x0 / BLOCK_SIZE; bx <= x1 / BLOCK_SIZE; bx++) {
                if (type & ~BL_MOB) {
                    for (bl = map[ m ].block[ bx + by * map[ m ].bxs ]; bl != NULL; bl = bl->next) {
                        if (bl->type&type &&
                            bl->x >= x0 && bl->x <= x1 &&
                            bl->y >= y0 && bl->y <= y1 &&
                            bl_list_count < BL_LIST_MAX)
                            if ((dx > 0 && bl->x < x0 + dx) ||
                                (dx < 0 && bl->x > x1 + dx) ||
                                (dy > 0 && bl->y < y0 + dy) ||
                                (dy < 0 && bl->y > y1 + dy))
                                bl_list[ bl_list_count++ ] = bl;
                    }
                }
                if (type&BL_MOB) {
                    for (bl = map[ m ].block_mob[ bx + by * map[ m ].bxs ]; bl != NULL; bl = bl->next) {
                        if (bl->x >= x0 && bl->x <= x1 &&
                            bl->y >= y0 && bl->y <= y1 &&
                            bl_list_count < BL_LIST_MAX)
                            if ((dx > 0 && bl->x < x0 + dx) ||
                                (dx < 0 && bl->x > x1 + dx) ||
                                (dy > 0 && bl->y < y0 + dy) ||
                                (dy < 0 && bl->y > y1 + dy))
                                bl_list[ bl_list_count++ ] = bl;
                    }
                }
            }
        }

    }

    if (bl_list_count >= BL_LIST_MAX)
        ShowWarning("map_foreachinmovearea: block count too many!\n");

    map_freeblock_lock();   // Prohibit the release from memory

    for (i = blockcount; i < bl_list_count; i++)
        if (bl_list[ i ]->prev) {  //func() may delete this bl_list[] slot, checking for prev ensures it wasnt queued for deletion.
            va_start(ap, type);
            returnCount += func(bl_list[ i ], ap);
            va_end(ap);
        }

    map_freeblock_unlock(); // Allow Free

    bl_list_count = blockcount;
    return returnCount;
}

// -- moonsoul  (added map_foreachincell which is a rework of map_foreachinarea but
//           which only checks the exact single x/y passed to it rather than an
//           area radius - may be more useful in some instances)
//
int map_foreachincell(int (*func)(struct block_list *,va_list), int m, int x, int y, int type, ...)
{
    int bx, by;
    int returnCount = 0;  //total sum of returned values of func() [Skotlex]
    struct block_list *bl;
    int blockcount = bl_list_count, i;
    va_list ap;

    if (x < 0 || y < 0 || x >= map[ m ].xs || y >= map[ m ].ys) return 0;

    by = y / BLOCK_SIZE;
    bx = x / BLOCK_SIZE;

    if (type&~BL_MOB)
        for (bl = map[ m ].block[ bx + by * map[ m ].bxs ]; bl != NULL; bl = bl->next)
            if (bl->type&type && bl->x == x && bl->y == y && bl_list_count < BL_LIST_MAX)
                bl_list[ bl_list_count++ ] = bl;
    if (type&BL_MOB)
        for (bl = map[ m ].block_mob[ bx + by * map[ m ].bxs]; bl != NULL; bl = bl->next)
            if (bl->x == x && bl->y == y && bl_list_count < BL_LIST_MAX)
                bl_list[ bl_list_count++ ] = bl;

    if (bl_list_count >= BL_LIST_MAX)
        ShowWarning("map_foreachincell: block count too many!\n");

    map_freeblock_lock();

    for (i = blockcount; i < bl_list_count; i++)
        if (bl_list[ i ]->prev) {  //func() may delete this bl_list[] slot, checking for prev ensures it wasnt queued for deletion.
            va_start(ap, type);
            returnCount += func(bl_list[ i ], ap);
            va_end(ap);
        }

    map_freeblock_unlock();

    bl_list_count = blockcount;
    return returnCount;
}

/*============================================================
* For checking a path between two points (x0, y0) and (x1, y1)
*------------------------------------------------------------*/
int map_foreachinpath(int (*func)(struct block_list *,va_list),int m,int x0,int y0,int x1,int y1,int range,int length, int type,...)
{
    int returnCount = 0;  //total sum of returned values of func() [Skotlex]
    //////////////////////////////////////////////////////////////
    //
    // sharp shooting 3 [Skotlex]
    //
    //////////////////////////////////////////////////////////////
    // problem:
    // Same as Sharp Shooting 1. Hits all targets within range of
    // the line.
    // (t1,t2 t3 and t4 get hit)
    //
    //     target 1
    //      x t4
    //     t2
    // t3 x
    //   x
    //  S
    //////////////////////////////////////////////////////////////
    // Methodology:
    // My trigonometrics and math are a little rusty... so the approach I am writing
    // here is basicly do a double for to check for all targets in the square that
    // contains the initial and final positions (area range increased to match the
    // radius given), then for each object to test, calculate the distance to the
    // path and include it if the range fits and the target is in the line (0<k<1,
    // as they call it).
    // The implementation I took as reference is found at
    // http://astronomy.swin.edu.au/~pbourke/geometry/pointline/
    // (they have a link to a C implementation, too)
    // This approach is a lot like #2 commented on this function, which I have no
    // idea why it was commented. I won't use doubles/floats, but pure int math for
    // speed purposes. The range considered is always the same no matter how
    // close/far the target is because that's how SharpShooting works currently in
    // kRO.

    //Generic map_foreach* variables.
    int i, blockcount = bl_list_count;
    struct block_list *bl;
    int bx, by;
    //method specific variables
    int magnitude2, len_limit; //The square of the magnitude
    int k, xi, yi, xu, yu;
    int mx0 = x0, mx1 = x1, my0 = y0, my1 = y1;
    va_list ap;

    //Avoid needless calculations by not getting the sqrt right away.
#define MAGNITUDE2(x0, y0, x1, y1) ( ( ( x1 ) - ( x0 ) ) * ( ( x1 ) - ( x0 ) ) + ( ( y1 ) - ( y0 ) ) * ( ( y1 ) - ( y0 ) ) )

    if (m < 0)
        return 0;

    len_limit = magnitude2 = MAGNITUDE2(x0, y0, x1, y1);
    if (magnitude2 < 1)   //Same begin and ending point, can't trace path.
        return 0;

    if (length) {   //Adjust final position to fit in the given area.
        //TODO: Find an alternate method which does not requires a square root calculation.
        k = (int)sqrt((float)magnitude2);
        mx1 = x0 + (x1 - x0) * length / k;
        my1 = y0 + (y1 - y0) * length / k;
        len_limit = MAGNITUDE2(x0, y0, mx1, my1);
    }
    //Expand target area to cover range.
    if (mx0 > mx1) {
        mx0 += range;
        mx1 -= range;
    } else {
        mx0 -= range;
        mx1 += range;
    }
    if (my0 > my1) {
        my0 += range;
        my1 -= range;
    } else {
        my0 -= range;
        my1 += range;
    }

    //The two fors assume mx0 < mx1 && my0 < my1
    if (mx0 > mx1)
        swap(mx0, mx1);
    if (my0 > my1)
        swap(my0, my1);

    mx0 = max(mx0, 0);
    my0 = max(my0, 0);
    mx1 = min(mx1, map[ m ].xs - 1);
    my1 = min(my1, map[ m ].ys - 1);

    range *= range << 8; //Values are shifted later on for higher precision using int math.

    if (type&~BL_MOB)
        for (by = my0 / BLOCK_SIZE; by <= my1 / BLOCK_SIZE; by++) {
            for (bx = mx0 / BLOCK_SIZE; bx <= mx1 / BLOCK_SIZE; bx++) {
                for (bl = map[ m ].block[ bx + by * map[ m ].bxs ]; bl != NULL; bl = bl->next) {
                    if (bl->prev && bl->type&type && bl_list_count < BL_LIST_MAX) {
                        xi = bl->x;
                        yi = bl->y;

                        k = (xi - x0) * (x1 - x0) + (yi - y0) * (y1 - y0);

                        if (k < 0 || k > len_limit)   //Since more skills use this, check for ending point as well.
                            continue;

                        if (k > magnitude2 && !path_search_long(NULL, m, x0, y0, xi, yi, CELL_CHKWALL))
                            continue; //Targets beyond the initial ending point need the wall check.

                        //All these shifts are to increase the precision of the intersection point and distance considering how it's
                        //int math.
                        k  = (k << 4) / magnitude2;   //k will be between 1~16 instead of 0~1
                        xi <<= 4;
                        yi <<= 4;
                        xu = (x0 << 4) + k * (x1 - x0);
                        yu = (y0 << 4) + k * (y1 - y0);
                        k  = MAGNITUDE2(xi, yi, xu, yu);

                        //If all dot coordinates were <<4 the square of the magnitude is <<8
                        if (k > range)
                            continue;

                        bl_list[ bl_list_count++ ] = bl;
                    }
                }
            }
        }
    if (type&BL_MOB)
        for (by = my0 / BLOCK_SIZE; by <= my1 / BLOCK_SIZE; by++) {
            for (bx = mx0 / BLOCK_SIZE; bx <= mx1 / BLOCK_SIZE; bx++) {
                for (bl = map[ m ].block_mob[ bx + by * map[ m ].bxs ]; bl != NULL; bl = bl->next) {
                    if (bl->prev && bl_list_count < BL_LIST_MAX) {
                        xi = bl->x;
                        yi = bl->y;
                        k = (xi - x0) * (x1 - x0) + (yi - y0) * (y1 - y0);

                        if (k < 0 || k > len_limit)
                            continue;

                        if (k > magnitude2 && !path_search_long(NULL, m, x0, y0, xi, yi, CELL_CHKWALL))
                            continue; //Targets beyond the initial ending point need the wall check.

                        k  = (k << 4) / magnitude2;   //k will be between 1~16 instead of 0~1
                        xi <<= 4;
                        yi <<= 4;
                        xu = (x0 << 4) + k * (x1 - x0);
                        yu = (y0 << 4) + k * (y1 - y0);
                        k  = MAGNITUDE2(xi, yi, xu, yu);

                        //If all dot coordinates were <<4 the square of the magnitude is <<8
                        if (k > range)
                            continue;

                        bl_list[ bl_list_count++ ] = bl;
                    }
                }
            }
        }

    if (bl_list_count >= BL_LIST_MAX)
        ShowWarning("map_foreachinpath: block count too many!\n");

    map_freeblock_lock();

    for (i = blockcount; i < bl_list_count; i++)
        if (bl_list[ i ]->prev) {  //func() may delete this bl_list[] slot, checking for prev ensures it wasnt queued for deletion.
            va_start(ap, type);
            returnCount += func(bl_list[ i ], ap);
            va_end(ap);
        }

    map_freeblock_unlock();

    bl_list_count = blockcount;
    return returnCount; //[Skotlex]

}

// Copy of map_foreachincell, but applied to the whole map. [Skotlex]
int map_foreachinmap(int (*func)(struct block_list *,va_list), int m, int type,...)
{
    int b, bsize;
    int returnCount = 0;  //total sum of returned values of func() [Skotlex]
    struct block_list *bl;
    int blockcount = bl_list_count, i;
    va_list ap;

    bsize = map[ m ].bxs * map[ m ].bys;

    if (type&~BL_MOB)
        for (b = 0; b < bsize; b++)
            for (bl = map[ m ].block[ b ]; bl != NULL; bl = bl->next)
                if (bl->type&type && bl_list_count < BL_LIST_MAX)
                    bl_list[ bl_list_count++ ] = bl;

    if (type&BL_MOB)
        for (b = 0; b < bsize; b++)
            for (bl = map[ m ].block_mob[ b ]; bl != NULL; bl = bl->next)
                if (bl_list_count < BL_LIST_MAX)
                    bl_list[ bl_list_count++ ] = bl;

    if (bl_list_count >= BL_LIST_MAX)
        ShowWarning("map_foreachinmap: block count too many!\n");

    map_freeblock_lock();

    for (i = blockcount; i < bl_list_count ; i++)
        if (bl_list[ i ]->prev) {  //func() may delete this bl_list[] slot, checking for prev ensures it wasnt queued for deletion.
            va_start(ap, type);
            returnCount += func(bl_list[ i ], ap);
            va_end(ap);
        }

    map_freeblock_unlock();

    bl_list_count = blockcount;
    return returnCount;
}


/// Generates a new flooritem object id from the interval [MIN_FLOORITEM, MAX_FLOORITEM).
/// Used for floor items, skill units and chatroom objects.
/// @return The new object id
int map_get_new_object_id(void)
{
    static int last_object_id = MIN_FLOORITEM - 1;
    int i;

    // find a free id
    i = last_object_id + 1;
    while (i != last_object_id) {
        if (i == MAX_FLOORITEM)
            i = MIN_FLOORITEM;

        if (!idb_exists(id_db, i))
            break;

        ++i;
    }

    if (i == last_object_id) {
        ShowError("map_addobject: no free object id!\n");
        return 0;
    }

    // update cursor
    last_object_id = i;

    return i;
}

/*==========================================
 * Timered function to clear the floor (remove remaining item)
 * Called each flooritem_lifetime ms
 *------------------------------------------*/
int map_clearflooritem_timer(int tid, unsigned int tick, int id, intptr_t data)
{
    struct flooritem_data *fitem = (struct flooritem_data *)idb_get(id_db, id);

    if (fitem == NULL || fitem->bl.type != BL_ITEM || (fitem->cleartimer != tid)) {
        ShowError("map_clearflooritem_timer : error\n");
        return 1;
    }


    if (search_petDB_index(fitem->item_data.nameid, PET_EGG) >= 0)
        intif_delete_petdata(MakeDWord(fitem->item_data.card[1], fitem->item_data.card[2]));

    clif_clearflooritem(fitem, 0);
    map_deliddb(&fitem->bl);
    map_delblock(&fitem->bl);
    map_freeblock(&fitem->bl);
    return 0;
}

/*
 * clears a single bl item out of the bazooonga.
 */
void map_clearflooritem(struct block_list *bl)
{
    struct flooritem_data *fitem = (struct flooritem_data *)bl;

    if (fitem->cleartimer)
        delete_timer(fitem->cleartimer,map_clearflooritem_timer);

    clif_clearflooritem(fitem, 0);
    map_deliddb(&fitem->bl);
    map_delblock(&fitem->bl);
    map_freeblock(&fitem->bl);
}

/*==========================================
 * (m,x,y) locates a random available free cell around the given coordinates
 * to place an BL_ITEM object. Scan area is 9x9, returns 1 on success.
 * x and y are modified with the target cell when successful.
 *------------------------------------------*/
int map_searchrandfreecell(int m,int *x,int *y,int stack)
{
    int free_cell,i,j;
    int free_cells[9][2];

    for (free_cell=0,i=-1; i<=1; i++) {
        if (i+*y<0 || i+*y>=map[m].ys)
            continue;
        for (j=-1; j<=1; j++) {
            if (j+*x<0 || j+*x>=map[m].xs)
                continue;
            if (map_getcell(m,j+*x,i+*y,CELL_CHKNOPASS) && !map_getcell(m,j+*x,i+*y,CELL_CHKICEWALL))
                continue;
            //Avoid item stacking to prevent against exploits. [Skotlex]
            if (stack && map_count_oncell(m,j+*x,i+*y, BL_ITEM) > stack)
                continue;
            free_cells[free_cell][0] = j+*x;
            free_cells[free_cell++][1] = i+*y;
        }
    }
    if (free_cell==0)
        return 0;
    free_cell = rnd()%free_cell;
    *x = free_cells[free_cell][0];
    *y = free_cells[free_cell][1];
    return 1;
}


static int map_count_sub(struct block_list *bl,va_list ap)
{
    return 1;
}

/*==========================================
 * Locates a random spare cell around the object given, using range as max
 * distance from that spot. Used for warping functions. Use range < 0 for
 * whole map range.
 * Returns 1 on success. when it fails and src is available, x/y are set to src's
 * src can be null as long as flag&1
 * when ~flag&1, m is not needed.
 * Flag values:
 * &1 = random cell must be around given m,x,y, not around src
 * &2 = the target should be able to walk to the target tile.
 * &4 = there shouldn't be any players around the target tile (use the no_spawn_on_player setting)
 *------------------------------------------*/
int map_search_freecell(struct block_list *src, int m, short *x,short *y, int rx, int ry, int flag)
{
    int tries, spawn=0;
    int bx, by;
    int rx2 = 2*rx+1;
    int ry2 = 2*ry+1;

    if (!src && (!(flag&1) || flag&2)) {
        ShowDebug("map_search_freecell: Incorrect usage! When src is NULL, flag has to be &1 and can't have &2\n");
        return 0;
    }

    if (flag&1) {
        bx = *x;
        by = *y;
    } else {
        bx = src->x;
        by = src->y;
        m = src->m;
    }
    if (!rx && !ry) {
        //No range? Return the target cell then....
        *x = bx;
        *y = by;
        return map_getcell(m,*x,*y,CELL_CHKREACH);
    }

    if (rx >= 0 && ry >= 0) {
        tries = rx2*ry2;
        if (tries > 100) tries = 100;
    } else {
        tries = map[m].xs*map[m].ys;
        if (tries > 500) tries = 500;
    }

    while (tries--) {
        *x = (rx >= 0)?(rnd()%rx2-rx+bx):(rnd()%(map[m].xs-2)+1);
        *y = (ry >= 0)?(rnd()%ry2-ry+by):(rnd()%(map[m].ys-2)+1);

        if (*x == bx && *y == by)
            continue; //Avoid picking the same target tile.

        if (map_getcell(m,*x,*y,CELL_CHKREACH)) {
            if (flag&2 && !unit_can_reach_pos(src, *x, *y, 1))
                continue;
            if (flag&4) {
                if (spawn >= 100) return 0; //Limit of retries reached.
                if (spawn++ < battle_config.no_spawn_on_player &&
                    map_foreachinarea(map_count_sub, m,
                                      *x-AREA_SIZE, *y-AREA_SIZE,
                                      *x+AREA_SIZE, *y+AREA_SIZE, BL_PC)
                   )
                    continue;
            }
            return 1;
        }
    }
    *x = bx;
    *y = by;
    return 0;
}

/*==========================================
 * Add an item to location (m,x,y)
 * Parameters
 * @item_data item attributes
 * @amount quantity
 * @m, @x, @y mapid,x,y
 * @first_charid, @second_charid, @third_charid, looting priority
 * @flag: &1 MVP item. &2 do stacking check.
 *------------------------------------------*/
int map_addflooritem(struct item *item_data,int amount,int m,int x,int y,int first_charid,int second_charid,int third_charid,int flags)
{
    int r;
    struct flooritem_data *fitem=NULL;

    nullpo_ret(item_data);

    if (!map_searchrandfreecell(m,&x,&y,flags&2?1:0))
        return 0;
    r=rnd();

    CREATE(fitem, struct flooritem_data, 1);
    fitem->bl.type=BL_ITEM;
    fitem->bl.prev = fitem->bl.next = NULL;
    fitem->bl.m=m;
    fitem->bl.x=x;
    fitem->bl.y=y;
    fitem->bl.id = map_get_new_object_id();
    if (fitem->bl.id==0) {
        aFree(fitem);
        return 0;
    }

    fitem->first_get_charid = first_charid;
    fitem->first_get_tick = gettick() + (flags&1 ? battle_config.mvp_item_first_get_time : battle_config.item_first_get_time);
    fitem->second_get_charid = second_charid;
    fitem->second_get_tick = fitem->first_get_tick + (flags&1 ? battle_config.mvp_item_second_get_time : battle_config.item_second_get_time);
    fitem->third_get_charid = third_charid;
    fitem->third_get_tick = fitem->second_get_tick + (flags&1 ? battle_config.mvp_item_third_get_time : battle_config.item_third_get_time);

    memcpy(&fitem->item_data,item_data,sizeof(*item_data));
    fitem->item_data.amount=amount;
    fitem->subx=(r&3)*3+3;
    fitem->suby=((r>>2)&3)*3+3;
    fitem->cleartimer=add_timer(gettick()+battle_config.flooritem_lifetime,map_clearflooritem_timer,fitem->bl.id,0);

    map_addiddb(&fitem->bl);
    map_addblock(&fitem->bl);
    clif_dropflooritem(fitem);

    return fitem->bl.id;
}

/**
 * @see DBCreateData
 */
static DBData create_charid2nick(DBKey key, va_list args)
{
    struct charid2nick *p;
    CREATE(p, struct charid2nick, 1);
    return db_ptr2data(p);
}

/// Adds(or replaces) the nick of charid to nick_db and fullfils pending requests.
/// Does nothing if the character is online.
void map_addnickdb(int charid, const char *nick)
{
    struct charid2nick *p;
    struct charid_request *req;
    struct map_session_data *sd;

    if (map_charid2sd(charid))
        return;// already online

    p = idb_ensure(nick_db, charid, create_charid2nick);
    safestrncpy(p->nick, nick, sizeof(p->nick));

    while (p->requests) {
        req = p->requests;
        p->requests = req->next;
        sd = map_charid2sd(req->charid);
        if (sd)
            clif_solved_charname(sd->fd, charid, p->nick);
        aFree(req);
    }
}

/// Removes the nick of charid from nick_db.
/// Sends name to all pending requests on charid.
void map_delnickdb(int charid, const char *name)
{
    struct charid2nick *p;
    struct charid_request *req;
    struct map_session_data *sd;
    DBData data;

    if (!nick_db->remove(nick_db, db_i2key(charid), &data) || (p = db_data2ptr(&data)) == NULL)
        return;

    while (p->requests) {
        req = p->requests;
        p->requests = req->next;
        sd = map_charid2sd(req->charid);
        if (sd)
            clif_solved_charname(sd->fd, charid, name);
        aFree(req);
    }
    aFree(p);
}

/// Notifies sd of the nick of charid.
/// Uses the name in the character if online.
/// Uses the name in nick_db if offline.
void map_reqnickdb(struct map_session_data *sd, int charid)
{
    struct charid2nick *p;
    struct charid_request *req;
    struct map_session_data *tsd;

    nullpo_retv(sd);

    tsd = map_charid2sd(charid);
    if (tsd) {
        clif_solved_charname(sd->fd, charid, tsd->status.name);
        return;
    }

    p = idb_ensure(nick_db, charid, create_charid2nick);
    if (*p->nick) {
        clif_solved_charname(sd->fd, charid, p->nick);
        return;
    }
    // not in cache, request it
    CREATE(req, struct charid_request, 1);
    req->next = p->requests;
    p->requests = req;
    chrif_searchcharid(charid);
}

/*==========================================
 * add bl to id_db
 *------------------------------------------*/
void map_addiddb(struct block_list *bl)
{
    nullpo_retv(bl);

    if (bl->type == BL_PC) {
        TBL_PC *sd = (TBL_PC *)bl;
        idb_put(pc_db,sd->bl.id,sd);
        idb_put(charid_db,sd->status.char_id,sd);
    } else if (bl->type == BL_MOB) {
        TBL_MOB *md = (TBL_MOB *)bl;
        idb_put(mobid_db,bl->id,bl);

        if (md->state.boss)
            idb_put(bossid_db, bl->id, bl);
    }

    if (bl->type & BL_REGEN)
        idb_put(regen_db, bl->id, bl);

    idb_put(id_db,bl->id,bl);
}

/*==========================================
 * remove bl from id_db
 *------------------------------------------*/
void map_deliddb(struct block_list *bl)
{
    nullpo_retv(bl);

    if (bl->type == BL_PC) {
        TBL_PC *sd = (TBL_PC *)bl;
        idb_remove(pc_db,sd->bl.id);
        idb_remove(charid_db,sd->status.char_id);
    } else if (bl->type == BL_MOB) {
        idb_remove(mobid_db,bl->id);
        idb_remove(bossid_db,bl->id);
    }

    if (bl->type & BL_REGEN)
        idb_remove(regen_db,bl->id);

    idb_remove(id_db,bl->id);
}

/*==========================================
 * Standard call when a player connection is closed.
 *------------------------------------------*/
int map_quit(struct map_session_data *sd)
{
    int i;

    if (!sd->state.active) { //Removing a player that is not active.
        struct auth_node *node = chrif_search(sd->status.account_id);
        if (node && node->char_id == sd->status.char_id &&
            node->state != ST_LOGOUT)
            //Except when logging out, clear the auth-connect data immediately.
            chrif_auth_delete(node->account_id, node->char_id, node->state);
        //Non-active players should not have loaded any data yet (or it was cleared already) so no additional cleanups are needed.
        return 0;
    }

    if (sd->npc_timer_id != INVALID_TIMER) //Cancel the event timer.
        npc_timerevent_quit(sd);

    if (sd->npc_id)
        npc_event_dequeue(sd);

    if (sd->bg_id)
        bg_team_leave(sd,1);

    pc_itemcd_do(sd,false);

    npc_script_event(sd, NPCE_LOGOUT);

    //Unit_free handles clearing the player related data,
    //map_quit handles extra specific data which is related to quitting normally
    //(changing map-servers invokes unit_free but bypasses map_quit)
    if (sd->sc.count) {
        //Status that are not saved...
        status_change_end(&sd->bl, SC_BOSSMAPINFO, INVALID_TIMER);
        status_change_end(&sd->bl, SC_AUTOTRADE, INVALID_TIMER);
        status_change_end(&sd->bl, SC_SPURT, INVALID_TIMER);
        status_change_end(&sd->bl, SC_BERSERK, INVALID_TIMER);
        status_change_end(&sd->bl, SC__BLOODYLUST, INVALID_TIMER);
        status_change_end(&sd->bl, SC_TRICKDEAD, INVALID_TIMER);
        status_change_end(&sd->bl, SC_LEADERSHIP, INVALID_TIMER);
        status_change_end(&sd->bl, SC_GLORYWOUNDS, INVALID_TIMER);
        status_change_end(&sd->bl, SC_SOULCOLD, INVALID_TIMER);
        status_change_end(&sd->bl, SC_HAWKEYES, INVALID_TIMER);
        if (sd->sc.data[SC_ENDURE] && sd->sc.data[SC_ENDURE]->val4)
            status_change_end(&sd->bl, SC_ENDURE, INVALID_TIMER); //No need to save infinite endure.
        status_change_end(&sd->bl, SC_WEIGHT50, INVALID_TIMER);
        status_change_end(&sd->bl, SC_WEIGHT90, INVALID_TIMER);
        status_change_end(&sd->bl, SC_SATURDAYNIGHTFEVER, INVALID_TIMER);
        status_change_end(&sd->bl, SC_KYOUGAKU, INVALID_TIMER);
        if (battle_config.debuff_on_logout&1) {
            status_change_end(&sd->bl, SC_ORCISH, INVALID_TIMER);
            status_change_end(&sd->bl, SC_STRIPWEAPON, INVALID_TIMER);
            status_change_end(&sd->bl, SC_STRIPARMOR, INVALID_TIMER);
            status_change_end(&sd->bl, SC_STRIPSHIELD, INVALID_TIMER);
            status_change_end(&sd->bl, SC_STRIPHELM, INVALID_TIMER);
            status_change_end(&sd->bl, SC_EXTREMITYFIST, INVALID_TIMER);
            status_change_end(&sd->bl, SC_EXPLOSIONSPIRITS, INVALID_TIMER);
            if (sd->sc.data[SC_REGENERATION] && sd->sc.data[SC_REGENERATION]->val4)
                status_change_end(&sd->bl, SC_REGENERATION, INVALID_TIMER);
            //TO-DO Probably there are way more NPC_type negative status that are removed
            status_change_end(&sd->bl, SC_CHANGEUNDEAD, INVALID_TIMER);
            // Both these statuses are removed on logout. [L0ne_W0lf]
            status_change_end(&sd->bl, SC_SLOWCAST, INVALID_TIMER);
            status_change_end(&sd->bl, SC_CRITICALWOUND, INVALID_TIMER);
        }
        if (battle_config.debuff_on_logout&2) {
            status_change_end(&sd->bl, SC_MAXIMIZEPOWER, INVALID_TIMER);
            status_change_end(&sd->bl, SC_MAXOVERTHRUST, INVALID_TIMER);
            status_change_end(&sd->bl, SC_STEELBODY, INVALID_TIMER);
            status_change_end(&sd->bl, SC_PRESERVE, INVALID_TIMER);
            status_change_end(&sd->bl, SC_KAAHI, INVALID_TIMER);
            status_change_end(&sd->bl, SC_SPIRIT, INVALID_TIMER);
        }
    }

    for (i = 0; i < EQI_MAX; i++) {
        if (sd->equip_index[ i ] >= 0)
            if (!pc_isequip(sd , sd->equip_index[ i ]))
                pc_unequipitem(sd , sd->equip_index[ i ] , 2);
    }

    // Return loot to owner
    if (sd->pd) pet_lootitem_drop(sd->pd, sd);

    if (sd->state.storage_flag == 1) sd->state.storage_flag = 0;  // No need to Double Save Storage on Quit.

    if (sd->ed) {
        elemental_clean_effect(sd->ed);
        unit_remove_map(&sd->ed->bl,CLR_TELEPORT);
    }

    unit_remove_map_pc(sd,CLR_TELEPORT);

    if (map[sd->bl.m].instance_id) {
        // Avoid map conflicts and warnings on next login
        int m;
        struct point *pt;
        if (map[sd->bl.m].save.map)
            pt = &map[sd->bl.m].save;
        else
            pt = &sd->status.save_point;

        if ((m=map_mapindex2mapid(pt->map)) >= 0) {
            sd->bl.m = m;
            sd->bl.x = pt->x;
            sd->bl.y = pt->y;
            sd->mapindex = pt->map;
        }
    }

    party_booking_delete(sd); // Party Booking [Spiria]
    pc_makesavestatus(sd);
    pc_clean_skilltree(sd);
    chrif_save(sd,1);
    unit_free_pc(sd);
    return 0;
}

/*==========================================
 * Lookup, id to session (player,mob,npc,homon,merc..)
 *------------------------------------------*/
struct map_session_data *map_id2sd(int id) {
    if (id <= 0) return NULL;
    return (struct map_session_data *)idb_get(pc_db,id);
}

struct mob_data *map_id2md(int id) {
    if (id <= 0) return NULL;
    return (struct mob_data *)idb_get(mobid_db,id);
}

struct npc_data *map_id2nd(int id) {
    // just a id2bl lookup because there's no npc_db
    struct block_list *bl = map_id2bl(id);

    return BL_CAST(BL_NPC, bl);
}

struct homun_data *map_id2hd(int id) {
    struct block_list *bl = map_id2bl(id);

    return BL_CAST(BL_HOM, bl);
}

struct mercenary_data *map_id2mc(int id) {
    struct block_list *bl = map_id2bl(id);

    return BL_CAST(BL_MER, bl);
}

struct chat_data *map_id2cd(int id) {
    struct block_list *bl = map_id2bl(id);

    return BL_CAST(BL_CHAT, bl);
}

/// Returns the nick of the target charid or NULL if unknown (requests the nick to the char server).
const char *map_charid2nick(int charid)
{
    struct charid2nick *p;
    struct map_session_data *sd;

    sd = map_charid2sd(charid);
    if (sd)
        return sd->status.name;// character is online, return it's name

    p = idb_ensure(nick_db, charid, create_charid2nick);
    if (*p->nick)
        return p->nick;// name in nick_db

    chrif_searchcharid(charid);// request the name
    return NULL;
}

/// Returns the struct map_session_data of the charid or NULL if the char is not online.
struct map_session_data *map_charid2sd(int charid) {
    return (struct map_session_data *)idb_get(charid_db, charid);
}

/*==========================================
 * Search session data from a nick name
 * (without sensitive case if necessary)
 * return map_session_data pointer or NULL
 *------------------------------------------*/
struct map_session_data *map_nick2sd(const char *nick) {
    struct map_session_data *sd;
    struct map_session_data *found_sd;
    struct s_mapiterator *iter;
    size_t nicklen;
    int qty = 0;

    if (nick == NULL)
        return NULL;

    nicklen = strlen(nick);
    iter = mapit_getallusers();

    found_sd = NULL;
    for (sd = (TBL_PC *)mapit_first(iter); mapit_exists(iter); sd = (TBL_PC *)mapit_next(iter)) {
        if (battle_config.partial_name_scan) {
            // partial name search
            if (strnicmp(sd->status.name, nick, nicklen) == 0) {
                found_sd = sd;

                if (strcmp(sd->status.name, nick) == 0) {
                    // Perfect Match
                    qty = 1;
                    break;
                }

                qty++;
            }
        } else if (strcasecmp(sd->status.name, nick) == 0) {
            // exact search only
            found_sd = sd;
            break;
        }
    }
    mapit_free(iter);

    if (battle_config.partial_name_scan && qty != 1)
        found_sd = NULL;

    return found_sd;
}

/*==========================================
 * Looksup id_db DBMap and returns BL pointer of 'id' or NULL if not found
 *------------------------------------------*/
struct block_list *map_id2bl(int id) {
    return (struct block_list *)idb_get(id_db,id);
}

/**
 * Same as map_id2bl except it only checks for its existence
 **/
bool map_blid_exists(int id)
{
    return (idb_exists(id_db,id));
}

/*==========================================
 * Convext Mirror
 *------------------------------------------*/
struct mob_data *map_getmob_boss(int m) {
    DBIterator *iter;
    struct mob_data *md = NULL;
    bool found = false;

    iter = db_iterator(bossid_db);
    for (md = (struct mob_data *)dbi_first(iter); dbi_exists(iter); md = (struct mob_data *)dbi_next(iter)) {
        if (md->bl.m == m) {
            found = true;
            break;
        }
    }
    dbi_destroy(iter);

    return (found)? md : NULL;
}

struct mob_data *map_id2boss(int id) {
    if (id <= 0) return NULL;
    return (struct mob_data *)idb_get(bossid_db,id);
}

/// Applies func to all the players in the db.
/// Stops iterating if func returns -1.
void map_foreachpc(int (*func)(struct map_session_data *sd, va_list args), ...)
{
    DBIterator *iter;
    struct map_session_data *sd;

    iter = db_iterator(pc_db);
    for (sd = dbi_first(iter); dbi_exists(iter); sd = dbi_next(iter)) {
        va_list args;
        int ret;

        va_start(args, func);
        ret = func(sd, args);
        va_end(args);
        if (ret == -1)
            break;// stop iterating
    }
    dbi_destroy(iter);
}

/// Applies func to all the mobs in the db.
/// Stops iterating if func returns -1.
void map_foreachmob(int (*func)(struct mob_data *md, va_list args), ...)
{
    DBIterator *iter;
    struct mob_data *md;

    iter = db_iterator(mobid_db);
    for (md = (struct mob_data *)dbi_first(iter); dbi_exists(iter); md = (struct mob_data *)dbi_next(iter)) {
        va_list args;
        int ret;

        va_start(args, func);
        ret = func(md, args);
        va_end(args);
        if (ret == -1)
            break;// stop iterating
    }
    dbi_destroy(iter);
}

/// Applies func to all the npcs in the db.
/// Stops iterating if func returns -1.
void map_foreachnpc(int (*func)(struct npc_data *nd, va_list args), ...)
{
    DBIterator *iter;
    struct block_list *bl;

    iter = db_iterator(id_db);
    for (bl = (struct block_list *)dbi_first(iter); dbi_exists(iter); bl = (struct block_list *)dbi_next(iter)) {
        if (bl->type == BL_NPC) {
            struct npc_data *nd = (struct npc_data *)bl;
            va_list args;
            int ret;

            va_start(args, func);
            ret = func(nd, args);
            va_end(args);
            if (ret == -1)
                break;// stop iterating
        }
    }
    dbi_destroy(iter);
}

/// Applies func to everything in the db.
/// Stops iteratin gif func returns -1.
void map_foreachregen(int (*func)(struct block_list *bl, va_list args), ...)
{
    DBIterator *iter;
    struct block_list *bl;

    iter = db_iterator(regen_db);
    for (bl = (struct block_list *)dbi_first(iter); dbi_exists(iter); bl = (struct block_list *)dbi_next(iter)) {
        va_list args;
        int ret;

        va_start(args, func);
        ret = func(bl, args);
        va_end(args);
        if (ret == -1)
            break;// stop iterating
    }
    dbi_destroy(iter);
}

/// Applies func to everything in the db.
/// Stops iterating if func returns -1.
void map_foreachiddb(int (*func)(struct block_list *bl, va_list args), ...)
{
    DBIterator *iter;
    struct block_list *bl;

    iter = db_iterator(id_db);
    for (bl = (struct block_list *)dbi_first(iter); dbi_exists(iter); bl = (struct block_list *)dbi_next(iter)) {
        va_list args;
        int ret;

        va_start(args, func);
        ret = func(bl, args);
        va_end(args);
        if (ret == -1)
            break;// stop iterating
    }
    dbi_destroy(iter);
}

/// Iterator.
/// Can filter by bl type.
struct s_mapiterator {
    enum e_mapitflags flags;// flags for special behaviour
    enum bl_type types;// what bl types to return
    DBIterator *dbi;// database iterator
};

/// Returns true if the block_list matches the description in the iterator.
///
/// @param _mapit_ Iterator
/// @param _bl_ block_list
/// @return true if it matches
#define MAPIT_MATCHES(_mapit_,_bl_) \
    ( \
      ( (_bl_)->type & (_mapit_)->types /* type matches */ ) \
    )

/// Allocates a new iterator.
/// Returns the new iterator.
/// types can represent several BL's as a bit field.
/// TODO should this be expanded to allow filtering of map/guild/party/chat/cell/area/...?
///
/// @param flags Flags of the iterator
/// @param type Target types
/// @return Iterator
struct s_mapiterator *mapit_alloc(enum e_mapitflags flags, enum bl_type types) {
    struct s_mapiterator *mapit;

    CREATE(mapit, struct s_mapiterator, 1);
    mapit->flags = flags;
    mapit->types = types;
    if (types == BL_PC)       mapit->dbi = db_iterator(pc_db);
    else if (types == BL_MOB) mapit->dbi = db_iterator(mobid_db);
    else                       mapit->dbi = db_iterator(id_db);
    return mapit;
}

/// Frees the iterator.
///
/// @param mapit Iterator
void mapit_free(struct s_mapiterator *mapit)
{
    nullpo_retv(mapit);

    dbi_destroy(mapit->dbi);
    aFree(mapit);
}

/// Returns the first block_list that matches the description.
/// Returns NULL if not found.
///
/// @param mapit Iterator
/// @return first block_list or NULL
struct block_list *mapit_first(struct s_mapiterator *mapit) {
    struct block_list *bl;

    nullpo_retr(NULL,mapit);

    for (bl = (struct block_list *)dbi_first(mapit->dbi); bl != NULL; bl = (struct block_list *)dbi_next(mapit->dbi)) {
        if (MAPIT_MATCHES(mapit,bl))
            break;// found match
    }
    return bl;
}

/// Returns the last block_list that matches the description.
/// Returns NULL if not found.
///
/// @param mapit Iterator
/// @return last block_list or NULL
struct block_list *mapit_last(struct s_mapiterator *mapit) {
    struct block_list *bl;

    nullpo_retr(NULL,mapit);

    for (bl = (struct block_list *)dbi_last(mapit->dbi); bl != NULL; bl = (struct block_list *)dbi_prev(mapit->dbi)) {
        if (MAPIT_MATCHES(mapit,bl))
            break;// found match
    }
    return bl;
}

/// Returns the next block_list that matches the description.
/// Returns NULL if not found.
///
/// @param mapit Iterator
/// @return next block_list or NULL
struct block_list *mapit_next(struct s_mapiterator *mapit) {
    struct block_list *bl;

    nullpo_retr(NULL,mapit);

    for (; ;) {
        bl = (struct block_list *)dbi_next(mapit->dbi);
        if (bl == NULL)
            break;// end
        if (MAPIT_MATCHES(mapit,bl))
            break;// found a match
        // try next
    }
    return bl;
}

/// Returns the previous block_list that matches the description.
/// Returns NULL if not found.
///
/// @param mapit Iterator
/// @return previous block_list or NULL
struct block_list *mapit_prev(struct s_mapiterator *mapit) {
    struct block_list *bl;

    nullpo_retr(NULL,mapit);

    for (; ;) {
        bl = (struct block_list *)dbi_prev(mapit->dbi);
        if (bl == NULL)
            break;// end
        if (MAPIT_MATCHES(mapit,bl))
            break;// found a match
        // try prev
    }
    return bl;
}

/// Returns true if the current block_list exists in the database.
///
/// @param mapit Iterator
/// @return true if it exists
bool mapit_exists(struct s_mapiterator *mapit)
{
    nullpo_retr(false,mapit);

    return dbi_exists(mapit->dbi);
}

/*==========================================
 * Add npc-bl to id_db, basically register npc to map
 *------------------------------------------*/
bool map_addnpc(int m,struct npc_data *nd)
{
    nullpo_ret(nd);

    if (m < 0 || m >= map_num)
        return false;

    if (map[m].npc_num == MAX_NPC_PER_MAP) {
        ShowWarning("too many NPCs in one map %s\n",map[m].name);
        return false;
    }

    map[m].npc[map[m].npc_num]=nd;
    map[m].npc_num++;
    idb_put(id_db,nd->bl.id,nd);
    return true;
}

/*=========================================
 * Dynamic Mobs [Wizputer]
 *-----------------------------------------*/
// Stores the spawn data entry in the mob list.
// Returns the index of successful, or -1 if the list was full.
int map_addmobtolist(unsigned short m, struct spawn_data *spawn)
{
    size_t i;
    ARR_FIND(0, MAX_MOB_LIST_PER_MAP, i, map[m].moblist[i] == NULL);
    if (i < MAX_MOB_LIST_PER_MAP) {
        map[m].moblist[i] = spawn;
        return i;
    }
    return -1;
}

void map_spawnmobs(int m)
{
    int i, k=0;
    if (map[m].mob_delete_timer != INVALID_TIMER) {
        //Mobs have not been removed yet [Skotlex]
        delete_timer(map[m].mob_delete_timer, map_removemobs_timer);
        map[m].mob_delete_timer = INVALID_TIMER;
        return;
    }
    for (i=0; i<MAX_MOB_LIST_PER_MAP; i++)
        if (map[m].moblist[i]!=NULL) {
            k+=map[m].moblist[i]->num;
            npc_parse_mob2(map[m].moblist[i]);
        }

    if (battle_config.etc_log && k > 0) {
        ShowStatus("Map %s: Spawned '"CL_WHITE"%d"CL_RESET"' mobs.\n",map[m].name, k);
    }
}

int map_removemobs_sub(struct block_list *bl, va_list ap)
{
    struct mob_data *md = (struct mob_data *)bl;
    nullpo_ret(md);

    //When not to remove mob:
    // doesn't respawn and is not a slave
    if (!md->spawn && !md->master_id)
        return 0;
    // respawn data is not in cache
    if (md->spawn && !md->spawn->state.dynamic)
        return 0;
    // hasn't spawned yet
    if (md->spawn_timer != INVALID_TIMER)
        return 0;
    // is damaged and mob_remove_damaged is off
    if (!battle_config.mob_remove_damaged && md->status.hp < md->status.max_hp)
        return 0;
    // is a mvp
    if (md->db->mexp > 0)
        return 0;

    unit_free(&md->bl,CLR_OUTSIGHT);

    return 1;
}

int map_removemobs_timer(int tid, unsigned int tick, int id, intptr_t data)
{
    int count;
    const int m = id;

    if (m < 0 || m >= MAX_MAP_PER_SERVER) {
        //Incorrect map id!
        ShowError("map_removemobs_timer error: timer %d points to invalid map %d\n",tid, m);
        return 0;
    }
    if (map[m].mob_delete_timer != tid) {
        //Incorrect timer call!
        ShowError("map_removemobs_timer mismatch: %d != %d (map %s)\n",map[m].mob_delete_timer, tid, map[m].name);
        return 0;
    }
    map[m].mob_delete_timer = INVALID_TIMER;
    if (map[m].users > 0) //Map not empty!
        return 1;

    count = map_foreachinmap(map_removemobs_sub, m, BL_MOB);

    if (battle_config.etc_log && count > 0)
        ShowStatus("Map %s: Removed '"CL_WHITE"%d"CL_RESET"' mobs.\n",map[m].name, count);

    return 1;
}

void map_removemobs(int m)
{
    if (map[m].mob_delete_timer != INVALID_TIMER) // should never happen
        return; //Mobs are already scheduled for removal

    map[m].mob_delete_timer = add_timer(gettick()+battle_config.mob_remove_delay, map_removemobs_timer, m, 0);
}

/*==========================================
 * Hookup, get map_id from map_name
 *------------------------------------------*/
int map_mapname2mapid(const char *name)
{
    unsigned short map_index;
    map_index = mapindex_name2id(name);
    if (!map_index)
        return -1;
    return map_mapindex2mapid(map_index);
}

/*==========================================
 * Returns the map of the given mapindex. [Skotlex]
 *------------------------------------------*/
int map_mapindex2mapid(unsigned short mapindex)
{
    struct map_data *md=NULL;

    if (!mapindex)
        return -1;

    md = (struct map_data *)uidb_get(map_db,(unsigned int)mapindex);
    if (md==NULL || md->cell==NULL)
        return -1;
    return md->m;
}

/*==========================================
 * Switching Ip, port ? (like changing map_server) get ip/port from map_name
 *------------------------------------------*/
int map_mapname2ipport(unsigned short name, uint32 *ip, uint16 *port)
{
    struct map_data_other_server *mdos=NULL;

    mdos = (struct map_data_other_server *)uidb_get(map_db,(unsigned int)name);
    if (mdos==NULL || mdos->cell) //If gat isn't null, this is a local map.
        return -1;
    *ip=mdos->ip;
    *port=mdos->port;
    return 0;
}

/*==========================================
 * Checks if both dirs point in the same direction.
 *------------------------------------------*/
int map_check_dir(int s_dir,int t_dir)
{
    if (s_dir == t_dir)
        return 0;
    switch (s_dir) {
        case 0:
            if (t_dir == 7 || t_dir == 1 || t_dir == 0) return 0;
            break;
        case 1:
            if (t_dir == 0 || t_dir == 2 || t_dir == 1) return 0;
            break;
        case 2:
            if (t_dir == 1 || t_dir == 3 || t_dir == 2) return 0;
            break;
        case 3:
            if (t_dir == 2 || t_dir == 4 || t_dir == 3) return 0;
            break;
        case 4:
            if (t_dir == 3 || t_dir == 5 || t_dir == 4) return 0;
            break;
        case 5:
            if (t_dir == 4 || t_dir == 6 || t_dir == 5) return 0;
            break;
        case 6:
            if (t_dir == 5 || t_dir == 7 || t_dir == 6) return 0;
            break;
        case 7:
            if (t_dir == 6 || t_dir == 0 || t_dir == 7) return 0;
            break;
    }
    return 1;
}

/*==========================================
 * Returns the direction of the given cell, relative to 'src'
 *------------------------------------------*/
uint8 map_calc_dir(struct block_list *src, int x, int y)
{
    unsigned char dir = 0;
    int dx, dy;

    nullpo_ret(src);

    dx = x-src->x;
    dy = y-src->y;
    if (dx == 0 && dy == 0) {
        // both are standing on the same spot
        //dir = 6; // aegis-style, makes knockback default to the left
        dir = unit_getdir(src); // athena-style, makes knockback default to behind 'src'
    } else if (dx >= 0 && dy >=0) {
        // upper-right
        if (dx*2 <= dy)      dir = 0;    // up
        else if (dx > dy*2)  dir = 6;    // right
        else                  dir = 7;  // up-right
    } else if (dx >= 0 && dy <= 0) {
        // lower-right
        if (dx*2 <= -dy)     dir = 4;    // down
        else if (dx > -dy*2) dir = 6;    // right
        else                  dir = 5;  // down-right
    } else if (dx <= 0 && dy <= 0) {
        // lower-left
        if (dx*2 >= dy)      dir = 4;    // down
        else if (dx < dy*2)  dir = 2;    // left
        else                  dir = 3;  // down-left
    } else {
        // upper-left
        if (-dx*2 <= dy)     dir = 0;    // up
        else if (-dx > dy*2) dir = 2;    // left
        else                  dir = 1;  // up-left

    }
    return dir;
}

/*==========================================
 * Randomizes target cell x,y to a random walkable cell that
 * has the same distance from object as given coordinates do. [Skotlex]
 *------------------------------------------*/
int map_random_dir(struct block_list *bl, short *x, short *y)
{
    short xi = *x-bl->x;
    short yi = *y-bl->y;
    short i=0, j;
    int dist2 = xi*xi + yi*yi;
    short dist = (short)sqrt((float)dist2);
    short segment;

    if (dist < 1) dist =1;

    do {
        j = 1 + 2*(rnd()%4); //Pick a random diagonal direction
        segment = 1+(rnd()%dist); //Pick a random interval from the whole vector in that direction
        xi = bl->x + segment*dirx[j];
        segment = (short)sqrt((float)(dist2 - segment*segment)); //The complement of the previously picked segment
        yi = bl->y + segment*diry[j];
    } while (
        (map_getcell(bl->m,xi,yi,CELL_CHKNOPASS) || !path_search(NULL,bl->m,bl->x,bl->y,xi,yi,1,CELL_CHKNOREACH))
        && (++i)<100);

    if (i < 100) {
        *x = xi;
        *y = yi;
        return 1;
    }
    return 0;
}

// gat system
inline static struct mapcell map_gat2cell(int gat) {
    struct mapcell cell;

    memset(&cell,0,sizeof(struct mapcell));

    switch (gat) {
        case 0:
            cell.walkable = 1;
            cell.shootable = 1;
            cell.water = 0;
            break; // walkable ground
        case 1:
            cell.walkable = 0;
            cell.shootable = 0;
            cell.water = 0;
            break; // non-walkable ground
        case 2:
            cell.walkable = 1;
            cell.shootable = 1;
            cell.water = 0;
            break; // ???
        case 3:
            cell.walkable = 1;
            cell.shootable = 1;
            cell.water = 1;
            break; // walkable water
        case 4:
            cell.walkable = 1;
            cell.shootable = 1;
            cell.water = 0;
            break; // ???
        case 5:
            cell.walkable = 0;
            cell.shootable = 1;
            cell.water = 0;
            break; // gap (snipable)
        case 6:
            cell.walkable = 1;
            cell.shootable = 1;
            cell.water = 0;
            break; // ???
        default:
            ShowWarning("map_gat2cell: unrecognized gat type '%d'\n", gat);
            break;
    }

    return cell;
}

static int map_cell2gat(struct mapcell cell)
{
    if (cell.walkable == 1 && cell.shootable == 1 && cell.water == 0) return 0;
    if (cell.walkable == 0 && cell.shootable == 0 && cell.water == 0) return 1;
    if (cell.walkable == 1 && cell.shootable == 1 && cell.water == 1) return 3;
    if (cell.walkable == 0 && cell.shootable == 1 && cell.water == 0) return 5;

    ShowWarning("map_cell2gat: cell has no matching gat type\n");
    return 1; // default to 'wall'
}

/*==========================================
 * Confirm if celltype in (m,x,y) match the one given in cellchk
 *------------------------------------------*/
int map_getcell(int m,int x,int y,cell_chk cellchk)
{
    return (m < 0 || m >= MAX_MAP_PER_SERVER) ? 0 : map_getcellp(&map[m],x,y,cellchk);
}

int map_getcellp(struct map_data *m,int x,int y,cell_chk cellchk)
{
    struct mapcell cell;

    nullpo_ret(m);

    //NOTE: this intentionally overrides the last row and column
    if (x<0 || x>=m->xs-1 || y<0 || y>=m->ys-1)
        return(cellchk == CELL_CHKNOPASS);

    cell = m->cell[x + y*m->xs];

    switch (cellchk) {
            // gat type retrieval
        case CELL_GETTYPE:
            return map_cell2gat(cell);

            // base gat type checks
        case CELL_CHKWALL:
            return (!cell.walkable && !cell.shootable);

        case CELL_CHKWATER:
            return (cell.water);

        case CELL_CHKCLIFF:
            return (!cell.walkable && cell.shootable);


            // base cell type checks
        case CELL_CHKNPC:
            return (cell.npc);
        case CELL_CHKBASILICA:
            return (cell.basilica);
        case CELL_CHKLANDPROTECTOR:
            return (cell.landprotector);
        case CELL_CHKNOVENDING:
            return (cell.novending);
        case CELL_CHKNOCHAT:
            return (cell.nochat);
        case CELL_CHKMAELSTROM:
            return (cell.maelstrom);
        case CELL_CHKICEWALL:
            return (cell.icewall);

            // special checks
        case CELL_CHKPASS:
#ifdef CELL_NOSTACK
            if (cell.cell_bl >= battle_config.cell_stack_limit) return 0;
#endif
        case CELL_CHKREACH:
            return (cell.walkable);

        case CELL_CHKNOPASS:
#ifdef CELL_NOSTACK
            if (cell.cell_bl >= battle_config.cell_stack_limit) return 1;
#endif
        case CELL_CHKNOREACH:
            return (!cell.walkable);

        case CELL_CHKSTACK:
#ifdef CELL_NOSTACK
            return (cell.cell_bl >= battle_config.cell_stack_limit);
#else
            return 0;
#endif

        default:
            return 0;
    }
}

/*==========================================
 * Change the type/flags of a map cell
 * 'cell' - which flag to modify
 * 'flag' - true = on, false = off
 *------------------------------------------*/
void map_setcell(int m, int x, int y, cell_t cell, bool flag)
{
    int j;

    if (m < 0 || m >= map_num || x < 0 || x >= map[m].xs || y < 0 || y >= map[m].ys)
        return;

    j = x + y*map[m].xs;

    switch (cell) {
        case CELL_WALKABLE:
            map[m].cell[j].walkable = flag;
            break;
        case CELL_SHOOTABLE:
            map[m].cell[j].shootable = flag;
            break;
        case CELL_WATER:
            map[m].cell[j].water = flag;
            break;

        case CELL_NPC:
            map[m].cell[j].npc = flag;
            break;
        case CELL_BASILICA:
            map[m].cell[j].basilica = flag;
            break;
        case CELL_LANDPROTECTOR:
            map[m].cell[j].landprotector = flag;
            break;
        case CELL_NOVENDING:
            map[m].cell[j].novending = flag;
            break;
        case CELL_NOCHAT:
            map[m].cell[j].nochat = flag;
            break;
        case CELL_MAELSTROM:
            map[m].cell[j].maelstrom = flag;
            break;
        case CELL_ICEWALL:
            map[m].cell[j].icewall = flag;
            break;
        default:
            ShowWarning("map_setcell: invalid cell type '%d'\n", (int)cell);
            break;
    }
}

void map_setgatcell(int m, int x, int y, int gat)
{
    int j;
    struct mapcell cell;

    if (m < 0 || m >= map_num || x < 0 || x >= map[m].xs || y < 0 || y >= map[m].ys)
        return;

    j = x + y*map[m].xs;

    cell = map_gat2cell(gat);
    map[m].cell[j].walkable = cell.walkable;
    map[m].cell[j].shootable = cell.shootable;
    map[m].cell[j].water = cell.water;
}

/*==========================================
 * Invisible Walls
 *------------------------------------------*/
static DBMap *iwall_db;

void map_iwall_nextxy(int x, int y, int dir, int pos, int *x1, int *y1)
{
    if (dir == 0 || dir == 4)
        *x1 = x; // Keep X
    else if (dir > 0 && dir < 4)
        *x1 = x - pos; // Going left
    else
        *x1 = x + pos; // Going right

    if (dir == 2 || dir == 6)
        *y1 = y;
    else if (dir > 2 && dir < 6)
        *y1 = y - pos;
    else
        *y1 = y + pos;
}

bool map_iwall_set(int m, int x, int y, int size, int dir, bool shootable, const char *wall_name)
{
    struct iwall_data *iwall;
    int i, x1 = 0, y1 = 0;

    if (size < 1 || !wall_name)
        return false;

    if ((iwall = (struct iwall_data *)strdb_get(iwall_db, wall_name)) != NULL)
        return false; // Already Exists

    if (map_getcell(m, x, y, CELL_CHKNOREACH))
        return false; // Starting cell problem

    CREATE(iwall, struct iwall_data, 1);
    iwall->m = m;
    iwall->x = x;
    iwall->y = y;
    iwall->size = size;
    iwall->dir = dir;
    iwall->shootable = shootable;
    safestrncpy(iwall->wall_name, wall_name, sizeof(iwall->wall_name));

    for (i = 0; i < size; i++) {
        map_iwall_nextxy(x, y, dir, i, &x1, &y1);

        if (map_getcell(m, x1, y1, CELL_CHKNOREACH))
            break; // Collision

        map_setcell(m, x1, y1, CELL_WALKABLE, false);
        map_setcell(m, x1, y1, CELL_SHOOTABLE, shootable);

        clif_changemapcell(0, m, x1, y1, map_getcell(m, x1, y1, CELL_GETTYPE), ALL_SAMEMAP);
    }

    iwall->size = i;

    strdb_put(iwall_db, iwall->wall_name, iwall);
    map[m].iwall_num++;

    return true;
}

void map_iwall_get(struct map_session_data *sd)
{
    struct iwall_data *iwall;
    DBIterator *iter;
    int x1, y1;
    int i;

    if (map[sd->bl.m].iwall_num < 1)
        return;

    iter = db_iterator(iwall_db);
    for (iwall = dbi_first(iter); dbi_exists(iter); iwall = dbi_next(iter)) {
        if (iwall->m != sd->bl.m)
            continue;

        for (i = 0; i < iwall->size; i++) {
            map_iwall_nextxy(iwall->x, iwall->y, iwall->dir, i, &x1, &y1);
            clif_changemapcell(sd->fd, iwall->m, x1, y1, map_getcell(iwall->m, x1, y1, CELL_GETTYPE), SELF);
        }
    }
    dbi_destroy(iter);
}

void map_iwall_remove(const char *wall_name)
{
    struct iwall_data *iwall;
    int i, x1, y1;

    if ((iwall = (struct iwall_data *)strdb_get(iwall_db, wall_name)) == NULL)
        return; // Nothing to do

    for (i = 0; i < iwall->size; i++) {
        map_iwall_nextxy(iwall->x, iwall->y, iwall->dir, i, &x1, &y1);

        map_setcell(iwall->m, x1, y1, CELL_SHOOTABLE, true);
        map_setcell(iwall->m, x1, y1, CELL_WALKABLE, true);

        clif_changemapcell(0, iwall->m, x1, y1, map_getcell(iwall->m, x1, y1, CELL_GETTYPE), ALL_SAMEMAP);
    }

    map[iwall->m].iwall_num--;
    strdb_remove(iwall_db, iwall->wall_name);
}

/**
 * @see DBCreateData
 */
static DBData create_map_data_other_server(DBKey key, va_list args)
{
    struct map_data_other_server *mdos;
    unsigned short mapindex = (unsigned short)key.ui;
    mdos=(struct map_data_other_server *)aCalloc(1,sizeof(struct map_data_other_server));
    mdos->index = mapindex;
    memcpy(mdos->name, mapindex_id2name(mapindex), MAP_NAME_LENGTH);
    return db_ptr2data(mdos);
}

/*==========================================
 * Add mapindex to db of another map server
 *------------------------------------------*/
int map_setipport(unsigned short mapindex, uint32 ip, uint16 port)
{
    struct map_data_other_server *mdos=NULL;

    mdos= uidb_ensure(map_db,(unsigned int)mapindex, create_map_data_other_server);

    if (mdos->cell) //Local map,Do nothing. Give priority to our own local maps over ones from another server. [Skotlex]
        return 0;
    if (ip == clif_getip() && port == clif_getport()) {
        //That's odd, we received info that we are the ones with this map, but... we don't have it.
        ShowFatalError("map_setipport : received info that this map-server SHOULD have map '%s', but it is not loaded.\n",mapindex_id2name(mapindex));
        exit(EXIT_FAILURE);
    }
    mdos->ip   = ip;
    mdos->port = port;
    return 1;
}

/**
 * Delete all the other maps server management
 * @see DBApply
 */
int map_eraseallipport_sub(DBKey key, DBData *data, va_list va)
{
    struct map_data_other_server *mdos = db_data2ptr(data);
    if (mdos->cell == NULL) {
        db_remove(map_db,key);
        aFree(mdos);
    }
    return 0;
}

int map_eraseallipport(void)
{
    map_db->foreach(map_db,map_eraseallipport_sub);
    return 1;
}

/*==========================================
 * Delete mapindex from db of another map server
 *------------------------------------------*/
int map_eraseipport(unsigned short mapindex, uint32 ip, uint16 port)
{
    struct map_data_other_server *mdos;

    mdos = (struct map_data_other_server *)uidb_get(map_db,(unsigned int)mapindex);
    if (!mdos || mdos->cell) //Map either does not exists or is a local map.
        return 0;

    if (mdos->ip==ip && mdos->port == port) {
        uidb_remove(map_db,(unsigned int)mapindex);
        aFree(mdos);
        return 1;
    }
    return 0;
}

/*==========================================
 * [Shinryo]: Init the mapcache
 *------------------------------------------*/
static char *map_init_mapcache(FILE *fp)
{
    size_t size = 0;
    char *buffer;

    // No file open? Return..
    nullpo_ret(fp);

    // Get file size
    fseek(fp, 0, SEEK_END);
    size = ftell(fp);
    fseek(fp, 0, SEEK_SET);

    // Allocate enough space
    CREATE(buffer, char, size);

    // No memory? Return..
    nullpo_ret(buffer);

    // Read file into buffer..
    if (fread(buffer, sizeof(char), size, fp) != size) {
        ShowError("map_init_mapcache: Could not read entire mapcache file\n");
        return NULL;
    }

    return buffer;
}

/*==========================================
 * Map cache reading
 * [Shinryo]: Optimized some behaviour to speed this up
 *==========================================*/
int map_readfromcache(struct map_data *m, char *buffer, char *decode_buffer)
{
    int i;
    struct map_cache_main_header *header = (struct map_cache_main_header *)buffer;
    struct map_cache_map_info *info = NULL;
    char *p = buffer + sizeof(struct map_cache_main_header);

    for (i = 0; i < header->map_count; i++) {
        info = (struct map_cache_map_info *)p;

        if (strcmp(m->name, info->name) == 0)
            break; // Map found

        // Jump to next entry..
        p += sizeof(struct map_cache_map_info) + info->len;
    }

    if (info && i < header->map_count) {
        unsigned long size, xy;

        if (info->xs <= 0 || info->ys <= 0)
            return 0;// Invalid

        m->xs = info->xs;
        m->ys = info->ys;
        size = (unsigned long)info->xs*(unsigned long)info->ys;

        if (size > MAX_MAP_SIZE) {
            ShowWarning("map_readfromcache: %s exceeded MAX_MAP_SIZE of %d\n", info->name, MAX_MAP_SIZE);
            return 0; // Say not found to remove it from list.. [Shinryo]
        }

        // TO-DO: Maybe handle the scenario, if the decoded buffer isn't the same size as expected? [Shinryo]
        decode_zip(decode_buffer, &size, p+sizeof(struct map_cache_map_info), info->len);

        CREATE(m->cell, struct mapcell, size);


        for (xy = 0; xy < size; ++xy)
            m->cell[xy] = map_gat2cell(decode_buffer[xy]);

        return 1;
    }

    return 0; // Not found
}

int map_addmap(char *mapname)
{
    if (strcmpi(mapname,"clear")==0) {
        map_num = 0;
        instance_start = 0;
        return 0;
    }

    if (map_num >= MAX_MAP_PER_SERVER - 1) {
        ShowError("Could not add map '"CL_WHITE"%s"CL_RESET"', the limit of maps has been reached.\n",mapname);
        return 1;
    }

    mapindex_getmapname(mapname, map[map_num].name);
    map_num++;
    return 0;
}

static void map_delmapid(int id)
{
    ShowNotice("Removing map [ %s ] from maplist"CL_CLL"\n",map[id].name);
    memmove(map+id, map+id+1, sizeof(map[0])*(map_num-id-1));
    map_num--;
}

int map_delmap(char *mapname)
{
    int i;
    char map_name[MAP_NAME_LENGTH];

    if (strcmpi(mapname, "all") == 0) {
        map_num = 0;
        return 0;
    }

    mapindex_getmapname(mapname, map_name);
    for (i = 0; i < map_num; i++) {
        if (strcmp(map[i].name, map_name) == 0) {
            map_delmapid(i);
            return 1;
        }
    }
    return 0;
}

/// Initializes map flags and adjusts them depending on configuration.
void map_flags_init(void)
{
    int i;

    for (i = 0; i < map_num; i++) {
        // mapflags
        memset(&map[i].flag, 0, sizeof(map[i].flag));

        // additional mapflag data
        map[i].zone      = 0;  // restricted mapflag zone
        map[i].nocommand = 0;  // nocommand mapflag level
        map[i].bexp      = 100;  // per map base exp multiplicator
        map[i].jexp      = 100;  // per map job exp multiplicator
        memset(map[i].drop_list, 0, sizeof(map[i].drop_list));  // pvp nightmare drop list

        // adjustments
        if (battle_config.pk_mode)
            map[i].flag.pvp = 1; // make all maps pvp for pk_mode [Valaris]
    }
}

#define NO_WATER 1000000

/*
 * Reads from the .rsw for each map
 * Returns water height (or NO_WATER if file doesn't exist) or other error is encountered.
 * Assumed path for file is data/mapname.rsw
 * Credits to LittleWolf
 */
int map_waterheight(char *mapname)
{
    char fn[256];
    char *rsw, *found;

    //Look up for the rsw
    sprintf(fn, "data\\%s.rsw", mapname);

    found = grfio_find_file(fn);
    if (found) strcpy(fn, found); // replace with real name

    // read & convert fn
    rsw = (char *) grfio_read(fn);
    if (rsw) {
        //Load water height from file
        int wh = (int) *(float *)(rsw+166);
        aFree(rsw);
        return wh;
    }
    ShowWarning("Failed to find water level for (%s)\n", mapname, fn);
    return NO_WATER;
}

/*==================================
 * .GAT format
 *----------------------------------*/
int map_readgat(struct map_data *m)
{
    char filename[256];
    uint8 *gat;
    int water_height;
    size_t xy, off, num_cells;

    sprintf(filename, "data\\%s.gat", m->name);

    gat = (uint8 *) grfio_read(filename);
    if (gat == NULL)
        return 0;

    m->xs = *(int32 *)(gat+6);
    m->ys = *(int32 *)(gat+10);
    num_cells = m->xs * m->ys;
    CREATE(m->cell, struct mapcell, num_cells);

    water_height = map_waterheight(m->name);

    // Set cell properties
    off = 14;
    for (xy = 0; xy < num_cells; ++xy) {
        // read cell data
        float height = *(float *)(gat + off);
        uint32 type = *(uint32 *)(gat + off + 16);
        off += 20;

        if (type == 0 && water_height != NO_WATER && height > water_height)
            type = 3; // Cell is 0 (walkable) but under water level, set to 3 (walkable water)

        m->cell[xy] = map_gat2cell(type);
    }

    aFree(gat);

    return 1;
}

/*======================================
 * Add/Remove map to the map_db
 *--------------------------------------*/
void map_addmap2db(struct map_data *m)
{
    uidb_put(map_db, (unsigned int)m->index, m);
}

void map_removemapdb(struct map_data *m)
{
    uidb_remove(map_db, (unsigned int)m->index);
}

/*======================================
 * Initiate maps loading stage
 *--------------------------------------*/
int map_readallmaps(void)
{
    int i;
    FILE *fp=NULL;
    int maps_removed = 0;
    char *map_cache_buffer = NULL; // Has the uncompressed gat data of all maps, so just one allocation has to be made
    char map_cache_decode_buffer[MAX_MAP_SIZE];

    if (enable_grf)
        ShowStatus("Loading maps (using GRF files)...\n");
    else {
        char mapcachefilepath[254];
        sprintf(mapcachefilepath,"%s/%s%s",db_path,DBPATH,"map_cache.dat");
        ShowStatus("Loading maps (using %s as map cache)...\n", mapcachefilepath);
        if ((fp = fopen(mapcachefilepath, "rb")) == NULL) {
            ShowFatalError("Unable to open map cache file "CL_WHITE"%s"CL_RESET"\n", mapcachefilepath);
            exit(EXIT_FAILURE); //No use launching server if maps can't be read.
        }

        // Init mapcache data.. [Shinryo]
        map_cache_buffer = map_init_mapcache(fp);
        if (!map_cache_buffer) {
            ShowFatalError("Failed to initialize mapcache data (%s)..\n", mapcachefilepath);
            exit(EXIT_FAILURE);
        }
    }

    for (i = 0; i < map_num; i++) {
        size_t size;

        // show progress
        if (enable_grf)
            ShowStatus("Loading maps [%i/%i]: %s"CL_CLL"\r", i, map_num, map[i].name);

        // try to load the map
        if (!
            (enable_grf?
             map_readgat(&map[i])
             :map_readfromcache(&map[i], map_cache_buffer, map_cache_decode_buffer))
           ) {
            map_delmapid(i);
            maps_removed++;
            i--;
            continue;
        }

        map[i].index = mapindex_name2id(map[i].name);

        if (uidb_get(map_db,(unsigned int)map[i].index) != NULL) {
            ShowWarning("Map %s already loaded!"CL_CLL"\n", map[i].name);
            if (map[i].cell) {
                aFree(map[i].cell);
                map[i].cell = NULL;
            }
            map_delmapid(i);
            maps_removed++;
            i--;
            continue;
        }

        map_addmap2db(&map[i]);

        map[i].m = i;
        memset(map[i].moblist, 0, sizeof(map[i].moblist));  //Initialize moblist [Skotlex]
        map[i].mob_delete_timer = INVALID_TIMER;    //Initialize timer [Skotlex]

        map[i].bxs = (map[i].xs + BLOCK_SIZE - 1) / BLOCK_SIZE;
        map[i].bys = (map[i].ys + BLOCK_SIZE - 1) / BLOCK_SIZE;

        size = map[i].bxs * map[i].bys * sizeof(struct block_list *);
        map[i].block = (struct block_list **)aCalloc(size, 1);
        map[i].block_mob = (struct block_list **)aCalloc(size, 1);
    }

    // intialization and configuration-dependent adjustments of mapflags
    map_flags_init();

    if (!enable_grf) {
        fclose(fp);

        // The cache isn't needed anymore, so free it.. [Shinryo]
        aFree(map_cache_buffer);
    }

    // finished map loading
    ShowInfo("Successfully loaded '"CL_WHITE"%d"CL_RESET"' maps."CL_CLL"\n",map_num);
    instance_start = map_num; // Next Map Index will be instances

    if (maps_removed)
        ShowNotice("Maps removed: '"CL_WHITE"%d"CL_RESET"'\n",maps_removed);

    return 0;
}

////////////////////////////////////////////////////////////////////////
static int map_ip_set = 0;
static int char_ip_set = 0;

/*==========================================
 * Console Command Parser [Wizputer]
 *------------------------------------------*/
int parse_console(const char *buf)
{
    char type[64];
    char command[64];
    char map[64];
    int x = 0;
    int y = 0;
    int m;
    int n;
    struct map_session_data sd;

    memset(&sd, 0, sizeof(struct map_session_data));
    strcpy(sd.status.name, "console");

    if ((n = sscanf(buf, "%63[^:]:%63[^:]:%63s %d %d[^\n]", type, command, map, &x, &y)) < 5) {
        if ((n = sscanf(buf, "%63[^:]:%63[^\n]", type, command)) < 2) {
            n = sscanf(buf, "%63[^\n]", type);
        }
    }

    if (n == 5) {
        m = map_mapname2mapid(map);
        if (m < 0) {
            ShowWarning("Console: Unknown map.\n");
            return 0;
        }
        sd.bl.m = m;
        map_search_freecell(&sd.bl, m, &sd.bl.x, &sd.bl.y, -1, -1, 0);
        if (x > 0)
            sd.bl.x = x;
        if (y > 0)
            sd.bl.y = y;
    } else {
        map[0] = '\0';
        if (n < 2)
            command[0] = '\0';
        if (n < 1)
            type[0] = '\0';
    }

    ShowNotice("Type of command: '%s' || Command: '%s' || Map: '%s' Coords: %d %d\n", type, command, map, x, y);

    if (n == 5 && strcmpi("admin",type) == 0) {
        if (!is_atcommand(sd.fd, &sd, command, 0))
            ShowInfo("Console: not atcommand\n");
    } else if (n == 2 && strcmpi("server", type) == 0) {
        if (strcmpi("shutdown", command) == 0 || strcmpi("exit", command) == 0 || strcmpi("quit", command) == 0) {
            runflag = 0;
        }
    } else if (strcmpi("help", type) == 0) {
        ShowInfo("To use GM commands:\n");
        ShowInfo("  admin:<gm command>:<map of \"gm\"> <x> <y>\n");
        ShowInfo("You can use any GM command that doesn't require the GM.\n");
        ShowInfo("No using @item or @warp however you can use @charwarp\n");
        ShowInfo("The <map of \"gm\"> <x> <y> is for commands that need coords of the GM\n");
        ShowInfo("IE: @spawn\n");
        ShowInfo("To shutdown the server:\n");
        ShowInfo("  server:shutdown\n");
    }

    return 0;
}

/*==========================================
 * Read map server configuration files (conf/map_athena.conf...)
 *------------------------------------------*/
int map_config_read(char *cfgName)
{
    char line[1024], w1[1024], w2[1024];
    FILE *fp;

    fp = fopen(cfgName,"r");
    if (fp == NULL) {
        ShowError("Map configuration file not found at: %s\n", cfgName);
        return 1;
    }

    while (fgets(line, sizeof(line), fp)) {
        char *ptr;

        if (line[0] == '/' && line[1] == '/')
            continue;
        if ((ptr = strstr(line, "//")) != NULL)
            *ptr = '\n'; //Strip comments
        if (sscanf(line, "%[^:]: %[^\t\r\n]", w1, w2) < 2)
            continue;

        //Strip trailing spaces
        ptr = w2 + strlen(w2);
        while (--ptr >= w2 && *ptr == ' ');
        ptr++;
        *ptr = '\0';

        if (strcmpi(w1,"timestamp_format")==0)
            strncpy(timestamp_format, w2, 20);
        else if (strcmpi(w1,"stdout_with_ansisequence")==0)
            stdout_with_ansisequence = config_switch(w2);
        else if (strcmpi(w1,"console_silent")==0) {
            msg_silent = atoi(w2);
            if (msg_silent)  // only bother if its actually enabled
                ShowInfo("Console Silent Setting: %d\n", atoi(w2));
        } else if (strcmpi(w1, "userid")==0)
            chrif_setuserid(w2);
        else if (strcmpi(w1, "passwd") == 0)
            chrif_setpasswd(w2);
        else if (strcmpi(w1, "char_ip") == 0)
            char_ip_set = chrif_setip(w2);
        else if (strcmpi(w1, "char_port") == 0)
            chrif_setport(atoi(w2));
        else if (strcmpi(w1, "map_ip") == 0)
            map_ip_set = clif_setip(w2);
        else if (strcmpi(w1, "bind_ip") == 0)
            clif_setbindip(w2);
        else if (strcmpi(w1, "map_port") == 0) {
            clif_setport(atoi(w2));
            map_port = (atoi(w2));
        } else if (strcmpi(w1, "map") == 0)
            map_addmap(w2);
        else if (strcmpi(w1, "delmap") == 0)
            map_delmap(w2);
        else if (strcmpi(w1, "npc") == 0)
            npc_addsrcfile(w2);
        else if (strcmpi(w1, "delnpc") == 0)
            npc_delsrcfile(w2);
        else if (strcmpi(w1, "autosave_time") == 0) {
            autosave_interval = atoi(w2);
            if (autosave_interval < 1) //Revert to default saving.
                autosave_interval = DEFAULT_AUTOSAVE_INTERVAL;
            else
                autosave_interval *= 1000; //Pass from sec to ms
        } else if (strcmpi(w1, "minsave_time") == 0) {
            minsave_interval= atoi(w2);
            if (minsave_interval < 1)
                minsave_interval = 1;
        } else if (strcmpi(w1, "save_settings") == 0)
            save_settings = atoi(w2);
        else if (strcmpi(w1, "motd_txt") == 0)
            strcpy(motd_txt, w2);
        else if (strcmpi(w1, "help_txt") == 0)
            strcpy(help_txt, w2);
        else if (strcmpi(w1, "help2_txt") == 0)
            strcpy(help2_txt, w2);
        else if (strcmpi(w1, "charhelp_txt") == 0)
            strcpy(charhelp_txt, w2);
        else if (strcmpi(w1,"db_path") == 0)
            strncpy(db_path,w2,255);
        else if (strcmpi(w1, "console") == 0) {
            console = config_switch(w2);
            if (console)
                ShowNotice("Console Commands are enabled.\n");
        } else if (strcmpi(w1, "enable_spy") == 0)
            enable_spy = config_switch(w2);
        else if (strcmpi(w1, "use_grf") == 0)
            enable_grf = config_switch(w2);
        else if (strcmpi(w1, "console_msg_log") == 0)
            console_msg_log = atoi(w2);//[Ind]
        else if (strcmpi(w1, "import") == 0)
            map_config_read(w2);
        else
            ShowWarning("Unknown setting '%s' in file %s\n", w1, cfgName);
    }

    fclose(fp);
    return 0;
}

void map_reloadnpc_sub(char *cfgName)
{
    char line[1024], w1[1024], w2[1024];
    FILE *fp;

    fp = fopen(cfgName,"r");
    if (fp == NULL) {
        ShowError("Map configuration file not found at: %s\n", cfgName);
        return;
    }

    while (fgets(line, sizeof(line), fp)) {
        char *ptr;

        if (line[0] == '/' && line[1] == '/')
            continue;
        if ((ptr = strstr(line, "//")) != NULL)
            *ptr = '\n'; //Strip comments
        if (sscanf(line, "%[^:]: %[^\t\r\n]", w1, w2) < 2)
            continue;

        //Strip trailing spaces
        ptr = w2 + strlen(w2);
        while (--ptr >= w2 && *ptr == ' ');
        ptr++;
        *ptr = '\0';

        if (strcmpi(w1, "npc") == 0)
            npc_addsrcfile(w2);
        else if (strcmpi(w1, "import") == 0)
            map_reloadnpc_sub(w2);
        else
            ShowWarning("Unknown setting '%s' in file %s\n", w1, cfgName);
    }

    fclose(fp);
}

void map_reloadnpc(bool clear)
{
    if (clear)
        npc_addsrcfile("clear"); // this will clear the current script list

#ifdef RENEWAL
    map_reloadnpc_sub("npc/re/scripts_main.conf");
#else
    map_reloadnpc_sub("npc/pre-re/scripts_main.conf");
#endif
}

int inter_config_read(char *cfgName)
{
    char line[1024],w1[1024],w2[1024];
    FILE *fp;

    fp=fopen(cfgName,"r");
    if (fp==NULL) {
        ShowError("File not found: %s\n",cfgName);
        return 1;
    }
    while (fgets(line, sizeof(line), fp)) {
        if (line[0] == '/' && line[1] == '/')
            continue;
        if (sscanf(line,"%[^:]: %[^\r\n]",w1,w2) < 2)
            continue;

        if (strcmpi(w1, "main_chat_nick")==0)
            safestrncpy(main_chat_nick, w2, sizeof(main_chat_nick));
        else if (strcmpi(w1,"item_db_db")==0)
            strcpy(item_db_db,w2);
        else if (strcmpi(w1,"mob_db_db")==0)
            strcpy(mob_db_db,w2);
        else if (strcmpi(w1,"item_db2_db")==0)
            strcpy(item_db2_db,w2);
        else if (strcmpi(w1,"item_db_re_db")==0)
            strcpy(item_db_re_db,w2);
        else if (strcmpi(w1,"mob_db2_db")==0)
            strcpy(mob_db2_db,w2);
        else
            //Map Server SQL DB
            if (strcmpi(w1,"map_server_ip")==0)
                strcpy(map_server_ip, w2);
            else if (strcmpi(w1,"map_server_port")==0)
                map_server_port=atoi(w2);
            else if (strcmpi(w1,"map_server_id")==0)
                strcpy(map_server_id, w2);
            else if (strcmpi(w1,"map_server_pw")==0)
                strcpy(map_server_pw, w2);
            else if (strcmpi(w1,"map_server_db")==0)
                strcpy(map_server_db, w2);
            else if (strcmpi(w1,"default_codepage")==0)
                strcpy(default_codepage, w2);
            else if (strcmpi(w1,"use_sql_db")==0) {
                db_use_sqldbs = config_switch(w2);
                ShowStatus("Using SQL dbs: %s\n",w2);
            } else if (strcmpi(w1,"log_db_ip")==0)
                strcpy(log_db_ip, w2);
            else if (strcmpi(w1,"log_db_id")==0)
                strcpy(log_db_id, w2);
            else if (strcmpi(w1,"log_db_pw")==0)
                strcpy(log_db_pw, w2);
            else if (strcmpi(w1,"log_db_port")==0)
                log_db_port = atoi(w2);
            else if (strcmpi(w1,"log_db_db")==0)
                strcpy(log_db_db, w2);
            else if (mapreg_config_read(w1,w2))
                continue;
        //support the import command, just like any other config
            else if (strcmpi(w1,"import")==0)
                inter_config_read(w2);
    }
    fclose(fp);

    return 0;
}

/*=======================================
 *  MySQL Init
 *---------------------------------------*/
int map_sql_init(void)
{
    // main db connection
    mmysql_handle = Sql_Malloc();

    ShowInfo("Connecting to the Map DB Server....\n");
    if (SQL_ERROR == Sql_Connect(mmysql_handle, map_server_id, map_server_pw, map_server_ip, map_server_port, map_server_db))
        exit(EXIT_FAILURE);
    ShowStatus("connect success! (Map Server Connection)\n");

    if (strlen(default_codepage) > 0)
        if (SQL_ERROR == Sql_SetEncoding(mmysql_handle, default_codepage))
            Sql_ShowDebug(mmysql_handle);

    return 0;
}

int map_sql_close(void)
{
    ShowStatus("Close Map DB Connection....\n");
    Sql_Free(mmysql_handle);
    mmysql_handle = NULL;
#ifndef BETA_THREAD_TEST
    if (log_config.sql_logs) {
        ShowStatus("Close Log DB Connection....\n");
        Sql_Free(logmysql_handle);
        logmysql_handle = NULL;
    }
#endif
    return 0;
}

int log_sql_init(void)
{
#ifndef BETA_THREAD_TEST
    // log db connection
    logmysql_handle = Sql_Malloc();

    ShowInfo(""CL_WHITE"[SQL]"CL_RESET": Connecting to the Log Database "CL_WHITE"%s"CL_RESET" At "CL_WHITE"%s"CL_RESET"...\n",log_db_db,log_db_ip);
    if (SQL_ERROR == Sql_Connect(logmysql_handle, log_db_id, log_db_pw, log_db_ip, log_db_port, log_db_db))
        exit(EXIT_FAILURE);
    ShowStatus(""CL_WHITE"[SQL]"CL_RESET": Successfully '"CL_GREEN"connected"CL_RESET"' to Database '"CL_WHITE"%s"CL_RESET"'.\n", log_db_db);

    if (strlen(default_codepage) > 0)
        if (SQL_ERROR == Sql_SetEncoding(logmysql_handle, default_codepage))
            Sql_ShowDebug(logmysql_handle);
#endif
    return 0;
}

/**
 * @see DBApply
 */
int map_db_final(DBKey key, DBData *data, va_list ap)
{
    struct map_data_other_server *mdos = db_data2ptr(data);
    if (mdos && mdos->cell == NULL)
        aFree(mdos);
    return 0;
}

/**
 * @see DBApply
 */
int nick_db_final(DBKey key, DBData *data, va_list args)
{
    struct charid2nick *p = db_data2ptr(data);
    struct charid_request *req;

    if (p == NULL)
        return 0;
    while (p->requests) {
        req = p->requests;
        p->requests = req->next;
        aFree(req);
    }
    aFree(p);
    return 0;
}

int cleanup_sub(struct block_list *bl, va_list ap)
{
    nullpo_ret(bl);

    switch (bl->type) {
        case BL_PC:
            map_quit((struct map_session_data *) bl);
            break;
        case BL_NPC:
            npc_unload((struct npc_data *)bl,false);
            break;
        case BL_MOB:
            unit_free(bl,CLR_OUTSIGHT);
            break;
        case BL_PET:
            //There is no need for this, the pet is removed together with the player. [Skotlex]
            break;
        case BL_ITEM:
            map_clearflooritem(bl);
            break;
        case BL_SKILL:
            skill_delunit((struct skill_unit *) bl);
            break;
    }

    return 1;
}

/**
 * @see DBApply
 */
static int cleanup_db_sub(DBKey key, DBData *data, va_list va)
{
    return cleanup_sub(db_data2ptr(data), va);
}

/*==========================================
 * map destructor
 *------------------------------------------*/
void do_final(void)
{
    int i, j;
    struct map_session_data *sd;
    struct s_mapiterator *iter;

    ShowStatus("Terminating...\n");

    //Ladies and babies first.
    iter = mapit_getallusers();
    for (sd = (TBL_PC *)mapit_first(iter); mapit_exists(iter); sd = (TBL_PC *)mapit_next(iter))
        map_quit(sd);
    mapit_free(iter);

    /* prepares npcs for a faster shutdown process */
    do_clear_npc();

    // remove all objects on maps
    for (i = 0; i < map_num; i++) {
        ShowStatus("Cleaning up maps [%d/%d]: %s..."CL_CLL"\r", i+1, map_num, map[i].name);
        if (map[i].m >= 0)
            map_foreachinmap(cleanup_sub, i, BL_ALL);
    }
    ShowStatus("Cleaned up %d maps."CL_CLL"\n", map_num);

    id_db->foreach(id_db,cleanup_db_sub);
    chrif_char_reset_offline();
    chrif_flush_fifo();

    do_final_atcommand();
    do_final_battle();
    do_final_chrif();
    do_final_clif();
    do_final_npc();
    do_final_script();
    do_final_instance();
    do_final_itemdb();
    do_final_storage();
    do_final_guild();
    do_final_party();
    do_final_pc();
    do_final_pet();
    do_final_mob();
    do_final_msg();
    do_final_skill();
    do_final_status();
    do_final_unit();
    do_final_battleground();
    do_final_duel();
    do_final_elemental();

    map_db->destroy(map_db, map_db_final);

    for (i=0; i<map_num; i++) {
        if (map[i].cell) aFree(map[i].cell);
        if (map[i].block) aFree(map[i].block);
        if (map[i].block_mob) aFree(map[i].block_mob);
        if (battle_config.dynamic_mobs) { //Dynamic mobs flag by [random]
            if (map[i].mob_delete_timer != INVALID_TIMER)
                delete_timer(map[i].mob_delete_timer, map_removemobs_timer);
            for (j=0; j<MAX_MOB_LIST_PER_MAP; j++)
                if (map[i].moblist[j]) aFree(map[i].moblist[j]);
        }
    }

    mapindex_final();
    if (enable_grf)
        grfio_final();

    id_db->destroy(id_db, NULL);
    pc_db->destroy(pc_db, NULL);
    mobid_db->destroy(mobid_db, NULL);
    bossid_db->destroy(bossid_db, NULL);
    nick_db->destroy(nick_db, nick_db_final);
    charid_db->destroy(charid_db, NULL);
    iwall_db->destroy(iwall_db, NULL);
    regen_db->destroy(regen_db, NULL);

    map_sql_close();

    ShowStatus("Finished.\n");
}

static int map_abort_sub(struct map_session_data *sd, va_list ap)
{
    chrif_save(sd,1);
    return 1;
}


//------------------------------
// Function called when the server
// has received a crash signal.
//------------------------------
void do_abort(void)
{
    static int run = 0;
    //Save all characters and then flush the inter-connection.
    if (run) {
        ShowFatalError("Server has crashed while trying to save characters. Character data can't be saved!\n");
        return;
    }
    run = 1;
    if (!chrif_isconnected()) {
        if (pc_db->size(pc_db))
            ShowFatalError("Server has crashed without a connection to the char-server, %u characters can't be saved!\n", pc_db->size(pc_db));
        return;
    }
    ShowError("Server received crash signal! Attempting to save all online characters!\n");
    map_foreachpc(map_abort_sub);
    chrif_flush_fifo();
}

/*======================================================
 * Map-Server Version Screen [MC Cameri]
 *------------------------------------------------------*/
static void map_helpscreen(bool do_exit)
{
    ShowInfo("Usage: %s [options]\n", SERVER_NAME);
    ShowInfo("\n");
    ShowInfo("Options:\n");
    ShowInfo("  -?, -h [--help]\t\tDisplays this help screen.\n");
    ShowInfo("  -v [--version]\t\tDisplays the server's version.\n");
    ShowInfo("  --run-once\t\t\tCloses server after loading (testing).\n");
    ShowInfo("  --map-config <file>\t\tAlternative map-server configuration.\n");
    ShowInfo("  --battle-config <file>\tAlternative battle configuration.\n");
    ShowInfo("  --atcommand-config <file>\tAlternative atcommand configuration.\n");
    ShowInfo("  --script-config <file>\tAlternative script configuration.\n");
    ShowInfo("  --msg-config <file>\t\tAlternative message configuration.\n");
    ShowInfo("  --grf-path <file>\t\tAlternative GRF path configuration.\n");
    ShowInfo("  --inter-config <file>\t\tAlternative inter-server configuration.\n");
    ShowInfo("  --log-config <file>\t\tAlternative logging configuration.\n");
    if (do_exit)
        exit(EXIT_SUCCESS);
}

/*======================================================
 * Map-Server Version Screen [MC Cameri]
 *------------------------------------------------------*/
static void map_versionscreen(bool do_exit)
{
    ShowInfo(CL_WHITE"rAthena SVN version: %s" CL_RESET"\n", get_svn_revision());
    ShowInfo(CL_GREEN"Website/Forum:"CL_RESET"\thttp://rathena.org/\n");
    ShowInfo(CL_GREEN"IRC Channel:"CL_RESET"\tirc://irc.rathena.net/#rathena\n");
    ShowInfo("Open "CL_WHITE"readme.txt"CL_RESET" for more information.\n");
    if (do_exit)
        exit(EXIT_SUCCESS);
}

/*======================================================
 * Map-Server Init and Command-line Arguments [Valaris]
 *------------------------------------------------------*/
void set_server_type(void)
{
    SERVER_TYPE = ATHENA_SERVER_MAP;
}


/// Called when a terminate signal is received.
void do_shutdown(void)
{
    if (runflag != MAPSERVER_ST_SHUTDOWN) {
        runflag = MAPSERVER_ST_SHUTDOWN;
        ShowStatus("Shutting down...\n");
        {
            struct map_session_data *sd;
            struct s_mapiterator *iter = mapit_getallusers();
            for (sd = (TBL_PC *)mapit_first(iter); mapit_exists(iter); sd = (TBL_PC *)mapit_next(iter))
                clif_GM_kick(NULL, sd);
            mapit_free(iter);
            flush_fifos();
        }
        chrif_check_shutdown();
    }
}

static bool map_arg_next_value(const char *option, int i, int argc)
{
    if (i >= argc-1) {
        ShowWarning("Missing value for option '%s'.\n", option);
        return false;
    }

    return true;
}

int do_init(int argc, char *argv[])
{
    int i;

#ifdef GCOLLECT
    GC_enable_incremental();
#endif

    INTER_CONF_NAME="conf/inter_athena.conf";
    LOG_CONF_NAME="conf/log_athena.conf";
    MAP_CONF_NAME = "conf/map_athena.conf";
    BATTLE_CONF_FILENAME = "conf/battle_athena.conf";
    ATCOMMAND_CONF_FILENAME = "conf/atcommand_athena.conf";
    SCRIPT_CONF_NAME = "conf/script_athena.conf";
    MSG_CONF_NAME = "conf/msg_athena.conf";
    GRF_PATH_FILENAME = "conf/grf-files.txt";

    rnd_init();

    for (i = 1; i < argc ; i++) {
        const char *arg = argv[i];

        if (arg[0] != '-' && (arg[0] != '/' || arg[1] == '-')) {
            // -, -- and /
            ShowError("Unknown option '%s'.\n", argv[i]);
            exit(EXIT_FAILURE);
        } else if ((++arg)[0] == '-') {
            // long option
            arg++;

            if (strcmp(arg, "help") == 0) {
                map_helpscreen(true);
            } else if (strcmp(arg, "version") == 0) {
                map_versionscreen(true);
            } else if (strcmp(arg, "map-config") == 0) {
                if (map_arg_next_value(arg, i, argc))
                    MAP_CONF_NAME = argv[++i];
            } else if (strcmp(arg, "battle-config") == 0) {
                if (map_arg_next_value(arg, i, argc))
                    BATTLE_CONF_FILENAME = argv[++i];
            } else if (strcmp(arg, "atcommand-config") == 0) {
                if (map_arg_next_value(arg, i, argc))
                    ATCOMMAND_CONF_FILENAME = argv[++i];
            } else if (strcmp(arg, "script-config") == 0) {
                if (map_arg_next_value(arg, i, argc))
                    SCRIPT_CONF_NAME = argv[++i];
            } else if (strcmp(arg, "msg-config") == 0) {
                if (map_arg_next_value(arg, i, argc))
                    MSG_CONF_NAME = argv[++i];
            } else if (strcmp(arg, "grf-path-file") == 0) {
                if (map_arg_next_value(arg, i, argc))
                    GRF_PATH_FILENAME = argv[++i];
            } else if (strcmp(arg, "inter-config") == 0) {
                if (map_arg_next_value(arg, i, argc))
                    INTER_CONF_NAME = argv[++i];
            } else if (strcmp(arg, "log-config") == 0) {
                if (map_arg_next_value(arg, i, argc))
                    LOG_CONF_NAME = argv[++i];
            } else if (strcmp(arg, "run-once") == 0) { // close the map-server as soon as its done.. for testing [Celest]
                runflag = CORE_ST_STOP;
            } else {
                ShowError("Unknown option '%s'.\n", argv[i]);
                exit(EXIT_FAILURE);
            }
        } else switch (arg[0]) {
                    // short option
                case '?':
                case 'h':
                    map_helpscreen(true);
                    break;
                case 'v':
                    map_versionscreen(true);
                    break;
                default:
                    ShowError("Unknown option '%s'.\n", argv[i]);
                    exit(EXIT_FAILURE);
            }
    }

    map_config_read(MAP_CONF_NAME);
    /* only temporary until sirius's datapack patch is complete  */

    // loads npcs
    map_reloadnpc(false);

    chrif_checkdefaultlogin();

    if (!map_ip_set || !char_ip_set) {
        char ip_str[16];
        ip2str(addr_[0], ip_str);

        ShowWarning("Not all IP addresses in map_athena.conf configured, autodetecting...\n");

        if (naddr_ == 0)
            ShowError("Unable to determine your IP address...\n");
        else if (naddr_ > 1)
            ShowNotice("Multiple interfaces detected...\n");

        ShowInfo("Defaulting to %s as our IP address\n", ip_str);

        if (!map_ip_set)
            clif_setip(ip_str);
        if (!char_ip_set)
            chrif_setip(ip_str);
    }

    battle_config_read(BATTLE_CONF_FILENAME);
    msg_config_read(MSG_CONF_NAME);
    script_config_read(SCRIPT_CONF_NAME);
    inter_config_read(INTER_CONF_NAME);
    log_config_read(LOG_CONF_NAME);

    id_db = idb_alloc(DB_OPT_BASE);
    pc_db = idb_alloc(DB_OPT_BASE); //Added for reliable map_id2sd() use. [Skotlex]
    mobid_db = idb_alloc(DB_OPT_BASE);  //Added to lower the load of the lazy mob ai. [Skotlex]
    bossid_db = idb_alloc(DB_OPT_BASE); // Used for Convex Mirror quick MVP search
    map_db = uidb_alloc(DB_OPT_BASE);
    nick_db = idb_alloc(DB_OPT_BASE);
    charid_db = idb_alloc(DB_OPT_BASE);
    regen_db = idb_alloc(DB_OPT_BASE); // efficient status_natural_heal processing

    iwall_db = strdb_alloc(DB_OPT_RELEASE_DATA,2*NAME_LENGTH+2+1); // [Zephyrus] Invisible Walls

    map_sql_init();
    if (log_config.sql_logs)
        log_sql_init();

    mapindex_init();
    if (enable_grf)
        grfio_init(GRF_PATH_FILENAME);

    map_readallmaps();

    add_timer_func_list(map_freeblock_timer, "map_freeblock_timer");
    add_timer_func_list(map_clearflooritem_timer, "map_clearflooritem_timer");
    add_timer_func_list(map_removemobs_timer, "map_removemobs_timer");
    add_timer_interval(gettick()+1000, map_freeblock_timer, 0, 0, 60*1000);

    do_init_atcommand();
    do_init_battle();
    do_init_instance();
    do_init_chrif();
    do_init_clif();
    do_init_script();
    do_init_itemdb();
    do_init_skill();
    do_init_mob();
    do_init_pc();
    do_init_status();
    do_init_party();
    do_init_guild();
    do_init_storage();
    do_init_pet();
    do_init_merc();
    do_init_mercenary();
    do_init_elemental();
    do_init_quest();
    do_init_npc();
    do_init_unit();
    do_init_battleground();
    do_init_duel();

    npc_event_do_oninit();  // Init npcs (OnInit)

    if (console) {
        //##TODO invoke a CONSOLE_START plugin event
    }

    if (battle_config.pk_mode)
        ShowNotice("Server is running on '"CL_WHITE"PK Mode"CL_RESET"'.\n");

    ShowStatus("Server is '"CL_GREEN"ready"CL_RESET"' and listening on port '"CL_WHITE"%d"CL_RESET"'.\n\n", map_port);

    if (runflag != CORE_ST_STOP) {
        shutdown_callback = do_shutdown;
        runflag = MAPSERVER_ST_RUNNING;
    }
#if defined(BUILDBOT)
    if (buildbotflag)
        exit(EXIT_FAILURE);
#endif

    return 0;
}