--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/xrogue/weapons.c	Tue Apr 21 08:55:20 2015 -0400
@@ -0,0 +1,428 @@
+/*
+    weapons.c - Functions for dealing with problems brought about by weapons
+    
+    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 <curses.h>
+#include <ctype.h>
+#include "rogue.h"
+
+boomerang(ydelta, xdelta, item, tp)
+int ydelta, xdelta;
+register struct linked_list *item;
+register struct thing *tp;
+{
+        register struct object *obj;
+        struct thing midpoint;
+        coord oldpos;
+
+        obj = OBJPTR(item);
+        oldpos = obj->o_pos;
+
+        /*
+         * make it appear to fly at the target
+         */
+        do_motion(obj, ydelta, xdelta, tp);
+        hit_monster(unc(obj->o_pos), obj, tp);
+
+        /*
+         * Now let's make it fly back to the wielder.  We need to
+         * use midpoint to fool do_motion into thinking the action
+         * starts there.  Do_motion only looks at the t_pos field.
+         */
+        midpoint.t_pos = obj->o_pos;    /* Simulate a new start position */
+        do_motion(obj, -ydelta, -xdelta, &midpoint);
+
+        obj->o_pos = oldpos;
+}
+
+/*
+ * do the actual motion on the screen done by an object traveling
+ * across the room.  Note that we should not look at any field in
+ * tp other than t_pos unless we change boomerang().
+ */
+
+do_motion(obj, ydelta, xdelta, tp)
+register struct object *obj;
+register int ydelta, xdelta;
+register struct thing *tp;
+{
+
+    /*
+    * Come fly with us ...
+    */
+    obj->o_pos = tp->t_pos;
+    for (;;) {
+        register int ch;
+        /*
+        * Erase the old one
+        */
+        if (!ce(obj->o_pos, tp->t_pos) &&
+            cansee(unc(obj->o_pos)) &&
+            mvwinch(cw, obj->o_pos.y, obj->o_pos.x) != ' ') {
+                mvwaddch(cw, obj->o_pos.y, obj->o_pos.x, show(obj->o_pos.y, obj->o_pos.x));
+        }
+        /*
+        * Get the new position
+        */
+        obj->o_pos.y += ydelta;
+        obj->o_pos.x += xdelta;
+        if (shoot_ok(ch = winat(obj->o_pos.y, obj->o_pos.x)) && ch != DOOR && !ce(obj->o_pos, hero)) {
+                /*
+                * It hasn't hit anything yet, so display it
+                * If it alright.
+                */
+                if (cansee(unc(obj->o_pos)) &&
+                    mvwinch(cw, obj->o_pos.y, obj->o_pos.x) != ' ') {
+                        if (obj->o_type == MISSILE) nofont(cw);
+                        mvwaddch(cw, obj->o_pos.y, obj->o_pos.x, obj->o_type);
+                        newfont(cw);
+                        draw(cw);
+                }
+                continue;
+        }
+
+        /*
+         * Did we stop because of a monster or the hero?  If we did 
+         * not, we want to move our position back one because we could
+         * not actually make it this far.
+         */
+        if (!isalpha(ch) && 
+            !(obj->o_pos.y == hero.y && obj->o_pos.x == hero.x)) {
+                obj->o_pos.y -= ydelta;
+                obj->o_pos.x -= xdelta;
+        }
+
+        break;
+    }
+}
+
+
+/*
+ * fall:
+ *      Drop an item someplace around here.
+ */
+
+fall(item, pr)
+register struct linked_list *item;
+bool pr;
+{
+        register struct object *obj;
+        register struct room *rp;
+        register int i;
+        struct object *tobj;
+        struct linked_list *titem;
+        coord *fpos = NULL;
+
+        obj = OBJPTR(item);
+        /*
+         * try to drop the item, look up to 3 squares away for now
+         */
+        for (i=1; i<4; i++) {
+            if ((fpos = fallpos(&obj->o_pos, FALSE, i)) != NULL)
+                break;
+        }
+
+        if (fpos != NULL) {
+                if (obj->o_group) { /* try to add groups together */
+                    for(titem=lvl_obj; titem!=NULL; titem=next(titem)) {
+                        tobj = OBJPTR(titem);
+                        if (tobj->o_group == obj->o_group       &&
+                            tobj->o_pos.y == fpos->y            &&
+                            tobj->o_pos.x == fpos->x) {
+                                tobj->o_count += obj->o_count;
+                                o_discard(item);
+                                return;
+                        }
+                    }
+                }
+                mvaddch(fpos->y, fpos->x, obj->o_type);
+                obj->o_pos = *fpos;
+                if ((rp = roomin(&hero)) != NULL &&
+                    lit_room(rp)) {
+                        light(&hero);
+                        mvwaddch(cw, hero.y, hero.x, PLAYER);
+                }
+                attach(lvl_obj, item);
+                return;
+        }
+        if (pr) {
+            msg("The %s vanishes as it hits the ground.",
+                weaps[obj->o_which].w_name);            
+        }
+        o_discard(item);
+}
+
+/*
+ * Does the missile hit the monster
+ */
+
+hit_monster(y, x, obj, tp)
+register int y, x;
+struct object *obj;
+register struct thing *tp;
+{
+        static coord mp;
+
+        mp.y = y;
+        mp.x = x;
+        if (tp == &player) {
+                /* Make sure there is a monster where it landed */
+                if (!isalpha(mvwinch(mw, y, x))) {
+                        return(FALSE);
+                }
+
+                /* Player hits monster */
+                return(fight(&mp, obj, TRUE));
+        } else {
+                if (!ce(mp, hero)) {
+                    /* Monster hits monster */
+                    return(skirmish(tp, &mp, obj, TRUE));
+                }
+
+                /* Monster hits player */
+                return(attack(tp, obj, TRUE));
+        }
+}
+
+/*
+ * init_weapon:
+ *      Set up the initial goodies for a weapon
+ */
+
+init_weapon(weap, type)
+register struct object *weap;
+char type;
+{
+        register struct init_weps *iwp;
+
+        iwp = &weaps[type];
+        strcpy(weap->o_damage,iwp->w_dam);
+        strcpy(weap->o_hurldmg,iwp->w_hrl);
+        weap->o_launch = iwp->w_launch;
+        weap->o_flags = iwp->w_flags;
+        weap->o_weight = iwp->w_wght;
+        if (weap->o_flags & ISMANY) {
+                weap->o_count = rnd(8) + 8;
+                weap->o_group = newgrp();
+        } else {
+                weap->o_count = 1;
+        }
+}
+
+/*
+ * missile:
+ *      Fire a missile in a given direction
+ */
+
+missile(ydelta, xdelta, item, tp)
+int ydelta, xdelta;
+register struct linked_list *item;
+register struct thing *tp;
+{
+        register struct object *obj;
+        register struct linked_list *nitem;
+        char ch;
+
+        /*
+        * Get which thing we are hurling
+        */
+        if (item == NULL) {
+                return;
+        }
+        obj = OBJPTR(item);
+        if (obj->o_type == RELIC && obj->o_which == AXE_AKLAD) {
+            boomerang(ydelta, xdelta, item, tp);
+            return;
+        }
+
+        if (!dropcheck(obj)) return;    /* Can we get rid of it? */
+
+        if(!(obj->o_flags & ISMISL)) {
+            for(;;) {
+                msg(terse ? "Really throw? (y or n): "
+                          : "Do you really want to throw %s? (y or n): ",
+                                inv_name(obj, TRUE));
+                mpos = 0;
+                ch = wgetch(cw);
+                if (ch == 'n' || ch == ESC) {
+                    after = FALSE;
+                    return;
+                }
+                if (ch == 'y')
+                    break;
+            }
+        }
+        /*
+         * Get rid of the thing. If it is a non-multiple item object, or
+         * if it is the last thing, just drop it. Otherwise, create a new
+         * item with a count of one.
+         */
+        if (obj->o_count < 2) {
+                detach(tp->t_pack, item);
+                if (tp->t_pack == pack) {
+                        inpack--;
+                }
+        } 
+        else {
+                obj->o_count--;
+                nitem = (struct linked_list *) new_item(sizeof *obj);
+                obj = OBJPTR(nitem);
+                *obj = *(OBJPTR(item));
+                obj->o_count = 1;
+                item = nitem;
+        }
+        updpack(FALSE, tp);
+        do_motion(obj, ydelta, xdelta, tp);
+        /*
+        * AHA! Here it has hit something. If it is a wall or a door,
+        * or if it misses (combat) the monster, put it on the floor
+        */
+        if (!hit_monster(unc(obj->o_pos), obj, tp)) {
+                fall(item, TRUE);
+        }
+        else
+            o_discard(item);
+
+        mvwaddch(cw, hero.y, hero.x, PLAYER);
+        
+}
+
+/*
+ * num:
+ *      Figure out the plus number for armor/weapons
+ */
+
+char *
+num(n1, n2)
+register int n1, n2;
+{
+        static char numbuf[LINELEN/2];
+
+        if (n1 == 0 && n2 == 0) {
+                return "+0";
+        }
+        if (n2 == 0) {
+                sprintf(numbuf, "%s%d", n1 < 0 ? "" : "+", n1);
+        } else {
+                sprintf(numbuf, "%s%d, %s%d", n1 < 0 ? "" : "+", n1, n2 < 0 ? "" : "+", n2);
+        }
+        return(numbuf);
+}
+
+/*
+ * wield:
+ *      Pull out a certain weapon
+ */
+
+wield()
+{
+        register struct linked_list *item;
+        register struct object *obj, *oweapon;
+
+        /*
+         * It takes 2 movement periods to unwield a weapon and 2 movement
+         * periods to wield a weapon.
+         */
+        if (player.t_action != C_WIELD) {
+            player.t_action = C_WIELD;
+            player.t_using = NULL;      /* Make sure this is NULL! */
+            if (cur_weapon != NULL) {
+                player.t_no_move = 2 * movement(&player);
+                return;
+            }
+        }
+
+        if ((oweapon = cur_weapon) != NULL) {
+            /* At this point we have waited at least 2 units */
+            if (!dropcheck(cur_weapon)) {
+                    cur_weapon = oweapon;
+                    player.t_action = A_NIL;
+                    return;
+            }
+            if (terse)
+                addmsg("Was ");
+            else
+                addmsg("You were ");
+            msg("wielding %s", inv_name(oweapon, TRUE));
+        }
+
+        /* We we have something picked out? */
+        if (player.t_using == NULL) {
+            /* Now, what does he want to wield? */
+            if ((item = get_item(pack, "wield", WIELDABLE, FALSE, FALSE)) == NULL) {
+                    player.t_action = A_NIL;
+                    after = FALSE;
+                    return;
+            }
+            player.t_using = item;
+            player.t_no_move = 2 * movement(&player);
+            return;
+        }
+
+        /* We have waited our time, let's wield the weapon */
+        item = player.t_using;
+        player.t_using = NULL;
+        player.t_action = A_NIL;
+
+        obj = OBJPTR(item);
+
+        if (is_current(obj)) {
+                msg("Item in use.");
+                after = FALSE;
+                return;
+        }
+        if (player.t_ctype != C_FIGHTER && 
+            player.t_ctype != C_RANGER  &&
+            player.t_ctype != C_PALADIN &&
+            obj->o_type == WEAPON       &&
+            obj->o_which == TWOSWORD) {
+                switch (rnd(3)) {
+                case 0:
+                   msg("Only fighter types can wield the two-handed sword.");
+                when 1:
+                   msg("Your hand does not fit the two-handed sword.");
+                otherwise:
+                   msg("You can not wield the two-handed sword.");
+                }
+                return;
+        }
+        if (player.t_ctype != C_FIGHTER && 
+            player.t_ctype != C_ASSASSIN &&
+            player.t_ctype != C_THIEF   &&
+            player.t_ctype != C_MONK    &&
+            obj->o_type == WEAPON       &&
+            obj->o_which == BASWORD) {
+                switch (rnd(3)) {
+                case 0:
+                   msg("Only thief types can wield the bastard sword.");
+                when 1:
+                   msg("Your hand does not fit the bastard sword.");
+                otherwise:
+                   msg("You can not wield the bastard sword.");
+                }
+                return;
+        }
+           
+        if (terse) {
+                addmsg("W");
+        } else {
+                addmsg("You are now w");
+        }
+        msg("ielding %s", inv_name(obj, TRUE));
+        cur_weapon = obj;
+}
+