--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rogue4/rings.c	Sat Oct 24 16:52:52 2009 +0000
@@ -0,0 +1,208 @@
+/*
+ * Routines dealing specifically with rings
+ *
+ * @(#)rings.c	4.13 (Berkeley) 1/28/82
+ *
+ * Rogue: Exploring the Dungeons of Doom
+ * Copyright (C) 1980, 1981, 1982 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 <string.h>
+#include "rogue.h"
+
+/*
+ * ring_on:
+ *	Put a ring on a hand
+ */
+ring_on()
+{
+    register THING *obj;
+    register int ring;
+
+    obj = get_item("put on", RING);
+    /*
+     * Make certain that it is somethings that we want to wear
+     */
+    if (obj == NULL)
+	return;
+    if (obj->o_type != RING)
+    {
+	if (!terse)
+	    msg("it would be difficult to wrap that around a finger");
+	else
+	    msg("not a ring");
+	return;
+    }
+
+    /*
+     * find out which hand to put it on
+     */
+    if (is_current(obj))
+	return;
+
+    if (cur_ring[LEFT] == NULL && cur_ring[RIGHT] == NULL)
+    {
+	if ((ring = gethand()) < 0)
+	    return;
+    }
+    else if (cur_ring[LEFT] == NULL)
+	ring = LEFT;
+    else if (cur_ring[RIGHT] == NULL)
+	ring = RIGHT;
+    else
+    {
+	if (!terse)
+	    msg("you already have a ring on each hand");
+	else
+	    msg("wearing two");
+	return;
+    }
+    cur_ring[ring] = obj;
+
+    /*
+     * Calculate the effect it has on the poor guy.
+     */
+    switch (obj->o_which)
+    {
+	case R_ADDSTR:
+	    chg_str(obj->o_ac);
+	    break;
+	case R_SEEINVIS:
+	    invis_on();
+	    break;
+	case R_AGGR:
+	    aggravate();
+	    break;
+    }
+
+    if (!terse)
+	addmsg("you are now wearing ");
+    msg("%s (%c)", inv_name(obj, TRUE), pack_char(obj));
+}
+
+/*
+ * ring_off:
+ *	Take off a ring
+ */
+ring_off()
+{
+    register int ring;
+    register THING *obj;
+    register char packchar;
+
+    if (cur_ring[LEFT] == NULL && cur_ring[RIGHT] == NULL)
+    {
+	if (terse)
+	    msg("no rings");
+	else
+	    msg("you aren't wearing any rings");
+	return;
+    }
+    else if (cur_ring[LEFT] == NULL)
+	ring = RIGHT;
+    else if (cur_ring[RIGHT] == NULL)
+	ring = LEFT;
+    else
+	if ((ring = gethand()) < 0)
+	    return;
+    mpos = 0;
+    obj = cur_ring[ring];
+    if (obj == NULL)
+    {
+	msg("not wearing such a ring");
+	return;
+    }
+    packchar = pack_char(obj);
+    if (dropcheck(obj))
+	msg("was wearing %s(%c)", inv_name(obj, TRUE), packchar);
+}
+
+/*
+ * gethand:
+ *	Which hand is the hero interested in?
+ */
+gethand()
+{
+    register int c;
+
+    for (;;)
+    {
+	if (terse)
+	    msg("left or right ring? ");
+	else
+	    msg("left hand or right hand? ");
+	if ((c = readchar()) == ESCAPE)
+	    return -1;
+	mpos = 0;
+	if (c == 'l' || c == 'L')
+	    return LEFT;
+	else if (c == 'r' || c == 'R')
+	    return RIGHT;
+	if (terse)
+	    msg("L or R");
+	else
+	    msg("please type L or R");
+    }
+}
+
+/*
+ * ring_eat:
+ *	How much food does this ring use up?
+ */
+ring_eat(hand)
+register int hand;
+{
+    if (cur_ring[hand] == NULL)
+	return 0;
+    switch (cur_ring[hand]->o_which)
+    {
+	case R_REGEN:
+	    return 2;
+	case R_SUSTSTR:
+	case R_SUSTARM:
+	case R_PROTECT:
+	case R_ADDSTR:
+	case R_STEALTH:
+	    return 1;
+	case R_SEARCH:
+	case R_ADDHIT:
+	case R_ADDDAM:
+	    return (rnd(3) == 0);
+	case R_DIGEST:
+	    return -rnd(2);
+	case R_SEEINVIS:
+	    return (rnd(5) == 0);
+	default:
+	    return 0;
+    }
+}
+
+/*
+ * ring_num:
+ *	Print ring bonuses
+ */
+char *
+ring_num(obj)
+register THING *obj;
+{
+    static char buf[5];
+
+    if (!(obj->o_flags & ISKNOW))
+	return "";
+    switch (obj->o_which)
+    {
+	case R_PROTECT:
+	case R_ADDSTR:
+	case R_ADDDAM:
+	case R_ADDHIT:
+	    buf[0] = ' ';
+	    strcpy(&buf[1], num(obj->o_ac, 0, RING));
+	otherwise:
+	    return "";
+    }
+    return buf;
+}