--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/xrogue/actions.c	Tue Apr 21 08:55:20 2015 -0400
@@ -0,0 +1,1074 @@
+/*
+    actions.c  -  functions for dealing with monster actions
+   
+    XRogue: Expeditions into the Dungeons of Doom
+    Copyright (C) 1991 Robert Pietkivitch
+    All rights reserved.
+    
+    Based on "Advanced Rogue"
+    Copyright (C) 1984, 1985 Michael Morgan, Ken Dalka and AT&T
+    All rights reserved.
+
+    Based on "Rogue: Exploring the Dungeons of Doom"
+    Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
+    All rights reserved.
+    
+    See the file LICENSE.TXT for full copyright and licensing information.
+*/
+
+#include <ctype.h>
+#include <curses.h>
+#include <limits.h>
+#include "rogue.h"
+
+int mf_count = 0;       /* move_free counter - see actions.c(m_act()) */
+int mf_jmpcnt = 0;      /* move_free counter for # of jumps           */
+
+/* 
+ * Did we disrupt a spell? 
+ */
+dsrpt_monster(tp, always, see_him)
+register struct thing *tp;
+bool always, see_him;
+{
+    switch (tp->t_action) {
+    case A_SUMMON:
+    case A_MISSILE:
+    case A_SLOW:
+        tp->t_action = A_NIL;   /* Just make the old fellow start over again */
+        tp->t_no_move = movement(tp);
+        tp->t_using = NULL; /* Just to be on the safe side */
+        turn_on(*tp, WASDISRUPTED);
+        if (see_him)
+            msg("%s's spell has been disrupted.",prname(monster_name(tp),TRUE));
+        /*
+         * maybe choose something else to do next time since player
+         * is disrupting us
+         */
+        tp->t_summon *= 2;
+        tp->t_cast /= 2;
+        return;
+    }
+
+    /* We may want to disrupt other actions, too */
+    if (always) {
+        tp->t_action = A_NIL; /* Just make the old fellow start over again */
+        tp->t_no_move = movement(tp);
+        tp->t_using = NULL;/* Just to be on the safe side */
+    }
+}
+
+dsrpt_player()
+{
+    int which, action;
+    struct linked_list *item;
+    struct object *obj;
+    
+    action = player.t_action;
+    which = player.t_selection;
+
+    switch (action) {
+    case C_CAST: /* Did we disrupt a spell? */
+    case C_PRAY:
+    case C_CHANT:
+    {
+        msg("Your %s was disrupted!", action == C_CAST ? "spell" : "prayer");
+
+        /* Charge him 1/4 anyway */
+        if (action == C_CAST)
+            spell_power += magic_spells[which].s_cost / 4;
+        else if (action == C_PRAY)
+            pray_time += cleric_spells[which].s_cost / 4;
+        else if (action == C_CHANT)
+            chant_time += druid_spells[which].s_cost / 4;
+    }
+    when C_COUNT: /* counting of gold? */
+    {
+        if (purse > 0) {
+            msg("Your gold goes flying everywhere!");
+            do {
+                item = spec_item(GOLD, NULL, NULL, NULL);
+                obj = OBJPTR(item);
+                obj->o_count = min(purse, rnd(20)+1);
+                purse -= obj->o_count;
+                obj->o_pos = hero;
+                fall(item, FALSE);
+            } while (purse > 0 && rnd(25) != 1);
+        }
+    }
+    when C_EAT:
+        msg("Ack!  You gag on your food for a moment. ");
+        del_pack(player.t_using);
+        
+    when A_PICKUP:
+        msg("You drop what you are picking up! ");
+
+    when C_SEARCH:      /* searching for traps and secret doors... */
+        msg("Ouch!  You decide to stop searching. ");
+        count = 0;      /* don't search again */
+
+    when C_SETTRAP:
+        msg("Ouch!  You can't set a trap right now. ");
+
+    when A_NIL:
+    default:
+        return;
+    }
+    player.t_no_move = movement(&player); /* disoriented for a while */
+    player.t_action = A_NIL;
+    player.t_selection = 0;
+}
+
+/*
+ * m_act:
+ *      If the critter isn't doing anything, choose an action for it.
+ *      Otherwise, let it perform its chosen action.
+ */
+
+m_act(tp)
+register struct thing *tp;
+{
+    struct object *obj;
+    bool flee;          /* Are we scared? */
+
+    /* What are we planning to do? */
+    switch (tp->t_action) {
+        default:
+            /* An unknown action! */
+            msg("Unknown monster action (%d)", tp->t_action);
+
+            /* Fall through */
+
+        case A_NIL:
+            /* If the monster is fairly intelligent and about to die, it
+             * may turn tail and run.  But if we are a FRIENDLY creature
+             * in the hero's service, don't run.
+             */
+            if (off(*tp, ISFLEE)                                        &&
+                tp->t_stats.s_hpt < tp->maxstats.s_hpt                  &&
+                tp->t_stats.s_hpt < max(10, tp->maxstats.s_hpt/6)       &&
+                (off(*tp, ISFRIENDLY) || tp->t_dest != &hero)           &&
+                rnd(25) < tp->t_stats.s_intel) {
+                    turn_on(*tp, ISFLEE);
+
+                    /* It is okay to turn tail */
+                    tp->t_oldpos = tp->t_pos;
+                }
+
+            /* Should the monster run away? */
+            flee = on(*tp, ISFLEE) ||
+                ((tp->t_dest == &hero) && on(player, ISINWALL) &&
+                 off(*tp, CANINWALL));
+
+            m_select(tp, flee); /* Select an action */
+            return;
+
+        when A_ATTACK:
+            /* 
+             * We're trying to attack the player or monster at t_newpos 
+             * if the prey moved, do nothing
+             */
+            obj = tp->t_using ? OBJPTR(tp->t_using) : NULL;
+            if (ce(tp->t_newpos, hero)) {
+                attack(tp, obj, FALSE);
+            }
+            else if (mvwinch(mw, tp->t_newpos.y, tp->t_newpos.x) &&
+                     step_ok(tp->t_newpos.y, tp->t_newpos.x, FIGHTOK, tp)) {
+                skirmish(tp, &tp->t_newpos, obj, FALSE);
+            }
+
+        when A_SELL:
+                /* Is the quartermaster still next to us? */
+            if (ce(tp->t_newpos, hero)) sell(tp);
+
+                /* The quartermaster moved away */
+            else if (off(player, ISBLIND) && cansee(unc(tp->t_pos)) &&
+                (off(*tp, ISINVIS)     || on(player, CANSEE)) &&
+                (off(*tp, ISSHADOW)    || on(player, CANSEE)) &&
+                (off(*tp, CANSURPRISE) || ISWEARING(R_ALERT)) &&
+        (rnd(12) < 4))
+                msg("%s grunts with frustration",prname(monster_name(tp),TRUE));
+
+        when A_MOVE:
+            /* Let's try to move */
+            do_chase(tp);
+
+            /* If t_no_move > 0, we found that we have to fight! */
+            if (tp->t_no_move > 0) return;
+
+        when A_BREATHE:
+            /* Breathe on the critter */
+            m_breathe(tp);
+
+        when A_SLOW:
+            /* make him move slower */
+            add_slow();
+            turn_off(*tp, CANSLOW);
+
+        when A_MISSILE:
+            /* Start up a magic missile spell */
+            m_spell(tp);
+
+        when A_SONIC:
+            /* Let out a sonic blast! */
+            m_sonic(tp);
+
+        when A_THROW:
+            /* We're throwing something (like an arrow) */
+            missile(tp->t_newpos.y, tp->t_newpos.x, tp->t_using, tp);
+
+        when A_SUMMON:
+            /* We're summoning help */
+            m_summon(tp);
+
+        when A_USERELIC:
+            /* Use our relic */
+            m_use_relic(tp);
+
+        when A_USEWAND:
+            /* use the wand we have */
+            m_use_wand(tp);
+    }
+
+    /* Can we in fact move?  (we might have solidified in solid rock) */
+    if (!step_ok(hero.y, hero.x, NOMONST, &player)) {
+
+         if (move_free > 1) goto jump_over;   /* avoid messages */
+         if (mf_count > 2)  goto jump_over;   /* limit messages */
+
+         if (pstats.s_hpt < 1) {
+         pstats.s_hpt = -1;
+             msg("You have merged into the surroundings!  --More--");
+             wait_for(' ');
+             death(D_PETRIFY);
+         }
+         else {
+             mf_count += 1;  /* count number of times we are here */
+             pstats.s_hpt -= rnd(2)+1;
+             if (pstats.s_hpt < 1) {
+          pstats.s_hpt = -1;
+                  msg("You have merged into the surroundings!  --More--");
+                  wait_for(' ');
+                  death(D_PETRIFY);
+             }
+         }
+         switch (rnd(51)) {
+             case 0: msg("Arrrggghhhhh!! ");
+             when 5: msg("You can't move! "); 
+             when 10: msg("You motion angrily! "); 
+             when 15: msg("You feel so weird! ");
+             when 20: msg("If only you could phase. ");
+             when 25: msg("The rock maggots are closing in! ");
+             when 30: msg("You wrench and wrench and wrench... ");
+             when 35: msg("You wish you could teleport out of here! ");
+             when 40: msg("Your feel your life force ebbing away... ");
+             when 45: msg("You partially regain your senses. ");
+             when 50: msg("The rock maggots have found you!!! "); 
+             otherwise: pstats.s_hpt -= rnd(4)+1;
+         }
+         if (pstats.s_hpt < 1) {
+          pstats.s_hpt = -1;
+              msg("You lose the urge to live...  --More--");
+              wait_for(' ');
+              death(D_PETRIFY);
+     }
+        jump_over:
+        mf_jmpcnt++;          /* count this jump */
+        if (mf_jmpcnt > 9) {  /* take a few turns, then reset it */
+            mf_jmpcnt = 0;
+            mf_count  = 0;
+        }
+    }
+
+    /* No action now */
+    tp->t_action = A_NIL;
+    tp->t_using = NULL;
+}
+
+/*
+ * m_breathe:
+ *      Breathe in the chosen direction.
+ */
+
+m_breathe(tp)
+register struct thing *tp;
+{
+    register int damage;
+    register char *breath = NULL;
+
+    damage = tp->t_stats.s_hpt;
+    turn_off(*tp, CANSURPRISE);
+
+    /* Will it breathe at random */
+    if (on(*tp, CANBRANDOM)) {
+        /* Turn off random breath */
+        turn_off(*tp, CANBRANDOM);
+
+        /* Select type of breath */
+        switch (rnd(10)) {
+            case 0: breath = "acid";
+                    turn_on(*tp, NOACID);
+            when 1: breath = "flame";
+                    turn_on(*tp, NOFIRE);
+            when 2: breath = "lightning bolt";
+                    turn_on(*tp, NOBOLT);
+            when 3: breath = "chlorine gas";
+                    turn_on(*tp, NOGAS);
+            when 4: breath = "ice";
+                    turn_on(*tp, NOCOLD);
+            when 5: breath = "nerve gas";
+                    turn_on(*tp, NOPARALYZE);
+            when 6: breath = "sleeping gas";
+                    turn_on(*tp, NOSLEEP);
+            when 7: breath = "slow gas";
+                    turn_on(*tp, NOSLOW);
+            when 8: breath = "confusion gas";
+                    turn_on(*tp, ISCLEAR);
+            when 9: breath = "fear gas";
+                    turn_on(*tp, NOFEAR);
+        }
+    }
+
+    /* Or can it breathe acid? */
+    else if (on(*tp, CANBACID)) {
+        turn_off(*tp, CANBACID);
+        breath = "acid";
+    }
+
+    /* Or can it breathe fire */
+    else if (on(*tp, CANBFIRE)) {
+        turn_off(*tp, CANBFIRE);
+        breath = "flame";
+    }
+
+    /* Or can it breathe electricity? */
+    else if (on(*tp, CANBBOLT)) {
+        turn_off(*tp, CANBBOLT);
+        breath = "lightning bolt";
+    }
+
+    /* Or can it breathe gas? */
+    else if (on(*tp, CANBGAS)) {
+        turn_off(*tp, CANBGAS);
+        breath = "chlorine gas";
+    }
+
+    /* Or can it breathe ice? */
+    else if (on(*tp, CANBICE)) {
+        turn_off(*tp, CANBICE);
+        breath = "ice";
+    }
+
+    else if (on(*tp, CANBPGAS)) {
+        turn_off(*tp, CANBPGAS);
+        breath = "nerve gas";
+    }
+
+    /* can it breathe sleeping gas */
+    else if (on(*tp, CANBSGAS)) {
+        turn_off(*tp, CANBSGAS);
+        breath = "sleeping gas";
+    }
+
+    /* can it breathe slow gas */
+    else if (on(*tp, CANBSLGAS)) {
+        turn_off(*tp, CANBSLGAS);
+        breath = "slow gas";
+    }
+
+    /* can it breathe confusion gas */
+    else if (on(*tp, CANBCGAS)) {
+        turn_off(*tp, CANBCGAS);
+        breath = "confusion gas";
+    }
+
+    /* can it breathe fear gas */
+    else {
+        turn_off(*tp, CANBFGAS);
+        breath = "fear gas";
+    }
+
+    /* Now breathe */
+    shoot_bolt(tp, tp->t_pos, tp->t_newpos, FALSE, 
+                    tp->t_index, breath, damage);
+
+    running = FALSE;
+    if (fight_flush) flushinp();
+}
+
+/*
+ * m_select:
+ *      Select an action for the monster.
+ */
+
+m_select(th, flee)
+register struct thing *th;
+register bool flee; /* True if running away or player is inaccessible in wall */
+{
+    register struct room *rer, *ree;    /* room of chaser, room of chasee */
+    int dist = INT_MIN;
+    int mindist = INT_MAX, maxdist = INT_MIN;
+    bool rundoor;                       /* TRUE means run to a door */
+    char sch;
+    coord *last_door=0,                 /* Door we just came from */
+           this;                        /* Temporary destination for chaser */
+
+    rer = roomin(&th->t_pos);   /* Find room of chaser */
+    ree = roomin(th->t_dest);   /* Find room of chasee */
+
+    /* First see if we want to use an ability or weapon */
+    if (m_use_it(th, flee, rer, ree)) return;
+
+    /*
+     * We don't count monsters on doors as inside rooms here because when
+     * a monster is in a room and the player is not in that room, the
+     * monster looks for the best door out.  If we counted doors as part
+     * of the room, the monster would already be on the best door out;
+     * so he would never move.
+     */
+    if ((sch = mvwinch(stdscr, th->t_pos.y, th->t_pos.x)) == DOOR ||
+        sch == SECRETDOOR || sch == PASSAGE) {
+        rer = NULL;
+    }
+    this = *th->t_dest;
+
+    /*
+     * If we are in a room heading for the player and the player is not
+     * in the room with us, we run to the "best" door.
+     * If we are in a room fleeing from the player, then we run to the
+     * "best" door if he IS in the same room.
+     *
+     * Note:  We don't bother with doors in mazes or if we can walk
+     * through walls.
+     */
+    if (rer != NULL && levtype != MAZELEV && off(*th, CANINWALL)) {
+        if (flee) rundoor = (rer == ree);
+        else rundoor = (rer != ree);
+    }
+    else rundoor = FALSE;
+
+    if (rundoor) {
+        register struct linked_list *exitptr;   /* For looping through exits */
+        coord *exit,                            /* A particular door */
+              *entrance;                        /* Place just inside doorway */
+        int exity, exitx;                       /* Door's coordinates */
+        char dch='\0';                          /* Door character */
+
+        if ((th->t_doorgoal.x != -1) && (th->t_doorgoal.y != -1))
+            dch = mvwinch(stdscr, th->t_doorgoal.y, th->t_doorgoal.x);
+            
+        /* Do we have a valid goal? */
+        if ((dch == PASSAGE || dch == DOOR) &&  /* A real door */
+            (!flee || !ce(th->t_doorgoal, *th->t_dest))) { /* Prey should not
+                                                             * be at door if
+                                                             * we are running
+                                                             * away
+                                                             */
+            /* Make sure the player is not in the doorway, either */
+            entrance = doorway(rer, &th->t_doorgoal);
+            if (!flee || entrance == NULL || !ce(*entrance, *th->t_dest)) {
+                this = th->t_doorgoal;
+                dist = 0;       /* Indicate that we have our door */
+            }
+        }
+
+        /* Go through all the doors */
+        else for (exitptr = rer->r_exit; exitptr; exitptr = next(exitptr)) {
+            exit = DOORPTR(exitptr);
+            exity = exit->y;
+            exitx = exit->x;
+
+            /* Make sure it is a real door */
+            dch = mvwinch(stdscr, exity, exitx);
+            if (dch == PASSAGE || dch == DOOR) {
+                /* Don't count a door if we are fleeing from someone and
+                 * he is standing on it.  Also, don't count it if he is
+                 * standing in the doorway.
+                 */
+                if (flee) {
+                    if (ce(*exit, *th->t_dest)) continue;
+
+                    entrance = doorway(rer, exit);
+                    if (entrance != NULL && ce(*entrance, *th->t_dest))
+                        continue;
+                }
+                
+                /* Were we just on this door? */
+                if (ce(*exit, th->t_oldpos)) last_door = exit;
+
+                else {
+                    dist = DISTANCE(th->t_dest->y, th->t_dest->x, exity, exitx);
+
+                    /* If fleeing, we want to maximize distance from door to
+                     * what we flee, and minimize distance from door to us.
+                     */
+                    if (flee)
+                       dist -= DISTANCE(th->t_pos.y, th->t_pos.x, exity, exitx);
+
+                    /* Maximize distance if fleeing, otherwise minimize it */
+                    if ((flee && (dist > maxdist)) ||
+                        (!flee && (dist < mindist))) {
+                        th->t_doorgoal = *exit;  /* Use this door */
+                        this = *exit;
+                        mindist = maxdist = dist;
+                    }
+                }
+            }
+        }
+
+        /* Could we not find a door? */
+        if (dist == INT_MIN) {
+            /* If we were on a door, go ahead and use it */
+            if (last_door) {
+                th->t_doorgoal = *last_door;
+                this = th->t_oldpos;
+                dist = 0;       /* Indicate that we found a door */
+            }
+            else th->t_doorgoal.x = th->t_doorgoal.y = -1; /* No more door goal */
+        }
+
+        /* Indicate that we do not want to flee from the door */
+        if (dist != INT_MIN) flee = FALSE;
+    }
+    else th->t_doorgoal.x = th->t_doorgoal.y = -1;    /* Not going to any door */
+
+    /* Now select someplace to go and start the action */
+    chase(th, &this, rer, ree, flee);
+}
+
+/*
+ * m_sonic:
+ *      The monster is sounding a sonic blast.
+ */
+
+m_sonic(tp)
+register struct thing *tp;
+{
+    register int damage;
+    struct object blast =
+    {
+        MISSILE, {0, 0}, 0, "", "150" , NULL, 0, 0, 0, 0
+    };
+
+    turn_off(*tp, CANSONIC);
+    turn_off(*tp, CANSURPRISE);
+    do_motion(&blast, tp->t_newpos.y, tp->t_newpos.x, tp);
+    damage = rnd(61)+40;
+    if (save(VS_BREATH, &player, -3))
+        damage /= 2;
+    msg ("%s's ultra-sonic blast hits you", prname(monster_name(tp), TRUE));
+    if ((pstats.s_hpt -= damage) <= 0) {
+    pstats.s_hpt = -1;
+        death(tp->t_index);
+    }
+    running = FALSE;
+    if (fight_flush) flushinp();
+    dsrpt_player();
+}
+
+/*
+ * m_spell:
+ *      The monster casts a spell.  Currently this is limited to
+ *      magic missile.
+ */
+m_spell(tp)
+register struct thing *tp;
+{
+    struct object missile =
+    {
+        MISSILE, {0, 0}, 0, "", "0d4 " , NULL, 0, WS_MISSILE, 100, 1
+    };
+
+    sprintf(missile.o_hurldmg, "%dd4", tp->t_stats.s_lvl);
+    do_motion(&missile, tp->t_newpos.y, tp->t_newpos.x, tp);
+    hit_monster(unc(missile.o_pos), &missile, tp);
+    turn_off(*tp, CANMISSILE);
+    turn_off(*tp, CANSURPRISE);
+
+    running = FALSE;
+    if (fight_flush) flushinp();
+}
+
+/*
+ * m_summon:
+ *      Summon aid.
+ */
+
+m_summon(tp)
+register struct thing *tp;
+{
+    register char *helpname, *mname;
+    int fail, numsum;
+    register int which, i;
+
+    /* Let's make sure our prey is still here */
+    if (!cansee(unc(tp->t_pos)) || fallpos(&hero, FALSE, 2) == NULL) return;
+
+    /*
+     * Non-uniques can only summon once.  Uniques get fewer
+     * creatures with each successive summoning. Also, the
+     * probability of summoning goes down
+     */
+    if (off(*tp, ISUNIQUE))
+            turn_off(*tp, CANSUMMON);
+
+    turn_off(*tp, CANSURPRISE);
+    mname = monster_name(tp);
+    helpname = monsters[tp->t_index].m_typesum;
+    which = findmindex(helpname);
+
+    if ((off(*tp, ISINVIS)     || on(player, CANSEE)) &&
+        (off(*tp, ISSHADOW)    || on(player, CANSEE)) &&
+        (off(*tp, CANSURPRISE) || ISWEARING(R_ALERT))) {
+        if (monsters[which].m_normal == FALSE) { /* genocided? */