X-Git-Url: https://jxself.org/git/?p=open-adventure.git;a=blobdiff_plain;f=actions.c;h=06da68805481e1526c7a24687b09c9224188b6b1;hp=6351f0d9164dd0647c43baba63ccc260a6bd831d;hb=7be7ac9406512644886fbf4a99d16e1b4f7cefc3;hpb=85f918f9c06bc8c64678848a29d348e354fbc146

diff --git a/actions.c b/actions.c
index 6351f0d..06da688 100644
--- a/actions.c
+++ b/actions.c
@@ -7,6 +7,7 @@
 static int fill(token_t, token_t);
 
 static void state_change(long obj, long state)
+/* Object must have a change-message list for this to be useful; only some do */
 {
     game.prop[obj] = state;
     pspeak(obj, change, state, true);
@@ -21,7 +22,6 @@ static int attack(struct command_t *command)
     vocab_t verb = command->verb;
     vocab_t obj = command->obj;
 
-    long spk = actions[verb].message;
     if (obj == NO_OBJECT ||
         obj == INTRANSITIVE) {
         int changes = 0;
@@ -69,69 +69,41 @@ static int attack(struct command_t *command)
         }
         if (changes >= 2)
             return GO_UNKNOWN;
-
     }
+
     if (obj == BIRD) {
         if (game.closed) {
             rspeak(UNHAPPY_BIRD);
-            return GO_CLEAROBJ;
+        } else {
+            DESTROY(BIRD);
+            rspeak(BIRD_DEAD);
         }
-        DESTROY(BIRD);
-        spk = BIRD_DEAD;
-    } else if (obj == VEND) {
+        return GO_CLEAROBJ;
+    }
+    if (obj == VEND) {
         state_change(VEND,
                      game.prop[VEND] == VEND_BLOCKS ? VEND_UNBLOCKS : VEND_BLOCKS);
         return GO_CLEAROBJ;
     }
 
-    if (obj == NO_OBJECT)
-        spk = NO_TARGET;
-    if (obj == CLAM ||
-        obj == OYSTER)
-        spk = SHELL_IMPERVIOUS;
-    if (obj == SNAKE)
-        spk = SNAKE_WARNING;
-    if (obj == DWARF)
-        spk = BARE_HANDS_QUERY;
-    if (obj == DWARF && game.closed)
-        return GO_DWARFWAKE;
-    if (obj == DRAGON)
-        spk = ALREADY_DEAD;
-    if (obj == TROLL)
-        spk = ROCKY_TROLL;
-    if (obj == OGRE)
-        spk = OGRE_DODGE;
-    if (obj == OGRE && atdwrf(game.loc) > 0) {
-        rspeak(spk);
-        rspeak(KNIFE_THROWN);
-        DESTROY(OGRE);
-        int dwarves = 0;
-        for (int i = 1; i < PIRATE; i++) {
-            if (game.dloc[i] == game.loc) {
-                ++dwarves;
-                game.dloc[i] = LOC_LONGWEST;
-                game.dseen[i] = false;
-            }
-        }
-        spk = (dwarves > 1) ?
-              OGRE_PANIC1 :
-              OGRE_PANIC2;
-    } else if (obj == BEAR) {
+    if (obj == BEAR) {
         switch (game.prop[BEAR]) {
         case UNTAMED_BEAR:
-            spk = BEAR_HANDS;
+            rspeak(BEAR_HANDS);
             break;
         case SITTING_BEAR:
-            spk = BEAR_CONFUSED;
+            rspeak(BEAR_CONFUSED);
             break;
         case CONTENTED_BEAR:
-            spk = BEAR_CONFUSED;
+            rspeak(BEAR_CONFUSED);
             break;
         case BEAR_DEAD:
-            spk = ALREADY_DEAD;
+            rspeak(ALREADY_DEAD);
             break;
         }
-    } else if (obj == DRAGON && game.prop[DRAGON] == DRAGON_BARS) {
+        return GO_CLEAROBJ;
+    }
+    if (obj == DRAGON && game.prop[DRAGON] == DRAGON_BARS) {
         /*  Fun stuff for dragon.  If he insists on attacking it, win!
          *  Set game.prop to dead, move dragon to central loc (still
          *  fixed), move rug there (not fixed), and move him there,
@@ -163,7 +135,53 @@ static int attack(struct command_t *command)
         return GO_MOVE;
     }
 
-    rspeak(spk);
+    if (obj == OGRE) {
+        rspeak(OGRE_DODGE);
+        if (atdwrf(game.loc) == 0)
+            return GO_CLEAROBJ;
+
+        rspeak(KNIFE_THROWN);
+        DESTROY(OGRE);
+        int dwarves = 0;
+        for (int i = 1; i < PIRATE; i++) {
+            if (game.dloc[i] == game.loc) {
+                ++dwarves;
+                game.dloc[i] = LOC_LONGWEST;
+                game.dseen[i] = false;
+            }
+        }
+        rspeak((dwarves > 1) ?
+               OGRE_PANIC1 :
+               OGRE_PANIC2);
+        return GO_CLEAROBJ;
+    }
+
+    switch (obj) {
+    case NO_OBJECT:
+        rspeak(NO_TARGET);
+        break;
+    case CLAM:
+    case OYSTER:
+        rspeak(SHELL_IMPERVIOUS);
+        break;
+    case SNAKE:
+        rspeak(SNAKE_WARNING);
+        break;
+    case DWARF:
+        if (game.closed) {
+            return GO_DWARFWAKE;
+        }
+        rspeak(BARE_HANDS_QUERY);
+        break;
+    case DRAGON:
+        rspeak(ALREADY_DEAD);
+        break;
+    case TROLL:
+        rspeak(ROCKY_TROLL);
+        break;
+    default:
+        rspeak(actions[verb].message);
+    }
     return GO_CLEAROBJ;
 }
 
@@ -210,38 +228,6 @@ static int bigwords(token_t foo)
     }
 }
 
-static int bivalve(token_t verb, token_t obj)
-/* Clam/oyster actions */
-{
-    bool is_oyster = (obj == OYSTER);
-    if (verb == LOCK) {
-        rspeak(HUH_MAN);
-        return GO_CLEAROBJ;
-    }
-    if (!TOTING(TRIDENT)) {
-        rspeak(is_oyster ?
-               OYSTER_OPENER :
-               CLAM_OPENER);
-        return GO_CLEAROBJ;
-    }
-    if (TOTING(obj)) {
-        rspeak( is_oyster ?
-                DROP_OYSTER :
-                DROP_CLAM);
-        return GO_CLEAROBJ;
-    }
-
-    if (!is_oyster) {
-        DESTROY(CLAM);
-        drop(OYSTER, game.loc);
-        drop(PEARL, LOC_CULDESAC);
-    }
-    rspeak(is_oyster ?
-           OYSTER_OPENS :
-           PEARL_FALLS);
-    return GO_CLEAROBJ;
-}
-
 static void blast(void)
 /*  Blast.  No effect unless you've got dynamite, which is a neat trick! */
 {
@@ -275,7 +261,7 @@ static int vbreak(token_t verb, token_t obj)
         if (TOTING(VASE))
             drop(VASE, game.loc);
         state_change(VASE, VASE_BROKEN);
-        game.fixed[VASE] = -1;
+        game.fixed[VASE] = IS_FIXED;
         return GO_CLEAROBJ;
     }
     rspeak(actions[verb].message);
@@ -296,7 +282,6 @@ static int vcarry(token_t verb, token_t obj)
  *  take one without the other).  Liquids also special, since they depend on
  *  status of bottle.  Also various side effects, etc. */
 {
-    int spk;
     if (obj == INTRANSITIVE) {
         /*  Carry, no object given yet.  OK if only one object present. */
         if (game.atloc[game.loc] == 0 ||
@@ -310,82 +295,100 @@ static int vcarry(token_t verb, token_t obj)
         rspeak(ALREADY_CARRYING);
         return GO_CLEAROBJ;
     }
-    spk = YOU_JOKING;
-    if (obj == PLANT && game.prop[PLANT] <= 0)
-        spk = DEEP_ROOTS;
-    if (obj == BEAR && game.prop[BEAR] == SITTING_BEAR)
-        spk = BEAR_CHAINED;
-    if (obj == CHAIN && game.prop[BEAR] != UNTAMED_BEAR)
-        spk = STILL_LOCKED;
-    if (obj == URN)
-        spk = URN_NOBUDGE;
-    if (obj == CAVITY)
-        spk = DOUGHNUT_HOLES;
-    if (obj == BLOOD)
-        spk = FEW_DROPS;
-    if (obj == RUG && game.prop[RUG] == RUG_HOVER)
-        spk = RUG_HOVERS;
-    if (obj == SIGN)
-        spk = HAND_PASSTHROUGH;
+
     if (obj == MESSAG) {
         rspeak(REMOVE_MESSAGE);
         DESTROY(MESSAG);
         return GO_CLEAROBJ;
     }
-    if (game.fixed[obj] != 0) {
-        rspeak(spk);
+
+    if (game.fixed[obj] != IS_FREE) {
+	/* Next guard tests whether plant is tiny or stashed */
+        if (obj == PLANT && game.prop[PLANT] <= PLANT_THIRSTY) {
+            rspeak(DEEP_ROOTS);
+            return GO_CLEAROBJ;
+        }
+        if (obj == BEAR && game.prop[BEAR] == SITTING_BEAR) {
+            rspeak(BEAR_CHAINED);
+            return GO_CLEAROBJ;
+        }
+        if (obj == CHAIN && game.prop[BEAR] != UNTAMED_BEAR) {
+            rspeak(STILL_LOCKED);
+            return GO_CLEAROBJ;
+        }
+        if (obj == URN) {
+            rspeak(URN_NOBUDGE);
+            return GO_CLEAROBJ;
+        }
+        if (obj == CAVITY) {
+            rspeak(DOUGHNUT_HOLES);
+            return GO_CLEAROBJ;
+        }
+        if (obj == BLOOD) {
+            rspeak(FEW_DROPS);
+            return GO_CLEAROBJ;
+        }
+        if (obj == RUG && game.prop[RUG] == RUG_HOVER) {
+            rspeak(RUG_HOVERS);
+            return GO_CLEAROBJ;
+        }
+        if (obj == SIGN) {
+            rspeak(HAND_PASSTHROUGH);
+            return GO_CLEAROBJ;
+        }
+        rspeak(YOU_JOKING);
         return GO_CLEAROBJ;
     }
+
     if (obj == WATER ||
         obj == OIL) {
         if (!HERE(BOTTLE) ||
             LIQUID() != obj) {
-            if (TOTING(BOTTLE) && game.prop[BOTTLE] == EMPTY_BOTTLE)
-                return (fill(verb, BOTTLE));
-            else {
-                if (game.prop[BOTTLE] != EMPTY_BOTTLE)
-                    spk = BOTTLE_FULL;
-                if (!TOTING(BOTTLE))
-                    spk = NO_CONTAINER;
-                rspeak(spk);
+            if (TOTING(BOTTLE)) {
+                if (game.prop[BOTTLE] == EMPTY_BOTTLE) {
+                    return (fill(verb, BOTTLE));
+                } else if (game.prop[BOTTLE] != EMPTY_BOTTLE)
+                    rspeak(BOTTLE_FULL);
                 return GO_CLEAROBJ;
             }
+            rspeak(NO_CONTAINER);
+            return GO_CLEAROBJ;
         }
         obj = BOTTLE;
     }
 
-    spk = CARRY_LIMIT;
     if (game.holdng >= INVLIMIT) {
-        rspeak(spk);
+        rspeak(CARRY_LIMIT);
         return GO_CLEAROBJ;
-    } else if (obj == BIRD && game.prop[BIRD] != BIRD_CAGED && -1 - game.prop[BIRD] != BIRD_CAGED) {
+
+    }
+
+    if (obj == BIRD && game.prop[BIRD] != BIRD_CAGED && STASHED(BIRD) != BIRD_CAGED) {
         if (game.prop[BIRD] == BIRD_FOREST_UNCAGED) {
             DESTROY(BIRD);
             rspeak(BIRD_CRAP);
             return GO_CLEAROBJ;
         }
-        if (!TOTING(CAGE))
-            spk = CANNOT_CARRY;
-        if (TOTING(ROD))
-            spk = BIRD_EVADES;
-        if (spk == CANNOT_CARRY ||
-            spk == BIRD_EVADES) {
-            rspeak(spk);
+        if (!TOTING(CAGE)) {
+            rspeak(CANNOT_CARRY);
+            return GO_CLEAROBJ;
+        }
+        if (TOTING(ROD)) {
+            rspeak(BIRD_EVADES);
             return GO_CLEAROBJ;
         }
         game.prop[BIRD] = BIRD_CAGED;
     }
-    /* FIXME: Arithmetic on state numbers */
     if ((obj == BIRD ||
          obj == CAGE) &&
-        (game.prop[BIRD] == BIRD_CAGED ||
-         -1 - game.prop[BIRD] == 1))
+        (game.prop[BIRD] == BIRD_CAGED || STASHED(BIRD) == BIRD_CAGED))
+        /* expression maps BIRD to CAGE and CAGE to BIRD */
         carry(BIRD + CAGE - obj, game.loc);
     carry(obj, game.loc);
-    if (obj == BOTTLE && LIQUID() != 0)
+    if (obj == BOTTLE && LIQUID() != NO_OBJECT)
         game.place[LIQUID()] = CARRIED;
-    if (GSTONE(obj) && game.prop[obj] != 0) {
-        game.prop[obj] = STATE_GROUND;
+    if (GSTONE(obj) && game.prop[obj] != STATE_FOUND) {
+        game.prop[obj] = STATE_FOUND;
         game.prop[CAVITY] = CAVITY_EMPTY;
     }
     rspeak(OK_MAN);
@@ -405,16 +408,16 @@ static int chain(token_t verb)
             return GO_CLEAROBJ;
         }
         game.prop[CHAIN] = CHAIN_HEAP;
-        game.fixed[CHAIN] = CHAIN_HEAP;
+        game.fixed[CHAIN] = IS_FREE;
         if (game.prop[BEAR] != BEAR_DEAD)
             game.prop[BEAR] = CONTENTED_BEAR;
 
         switch (game.prop[BEAR]) {
         case BEAR_DEAD:
-            game.fixed[BEAR] = -1;
+            game.fixed[BEAR] = IS_FIXED;
             break;
         default:
-            game.fixed[BEAR] = 0;
+            game.fixed[BEAR] = IS_FREE;
         }
         rspeak(CHAIN_UNLOCKED);
         return GO_CLEAROBJ;
@@ -433,7 +436,7 @@ static int chain(token_t verb)
 
     if (TOTING(CHAIN))
         drop(CHAIN, game.loc);
-    game.fixed[CHAIN] = -1;
+    game.fixed[CHAIN] = IS_FIXED;
 
     rspeak(CHAIN_LOCKED);
     return GO_CLEAROBJ;
@@ -444,12 +447,11 @@ static int discard(token_t verb, token_t obj, bool just_do_it)
  *  bird (might attack snake or dragon) and cage (might contain bird) and vase.
  *  Drop coins at vending machine for extra batteries. */
 {
-    int spk = actions[verb].message;
     if (!just_do_it) {
         if (TOTING(ROD2) && obj == ROD && !TOTING(ROD))
             obj = ROD2;
         if (!TOTING(obj)) {
-            rspeak(spk);
+            rspeak(actions[verb].message);
             return GO_CLEAROBJ;
         }
         if (obj == BIRD && HERE(SNAKE)) {
@@ -462,11 +464,11 @@ static int discard(token_t verb, token_t obj, bool just_do_it)
 
         } else if ((GSTONE(obj) && AT(CAVITY) && game.prop[CAVITY] != CAVITY_FULL)) {
             rspeak(GEM_FITS);
-            game.prop[obj] = 1;
+            game.prop[obj] = STATE_IN_CAVITY;
             game.prop[CAVITY] = CAVITY_FULL;
             if (HERE(RUG) && ((obj == EMERALD && game.prop[RUG] != RUG_HOVER) ||
                               (obj == RUBY && game.prop[RUG] == RUG_HOVER))) {
-                spk = RUG_RISES;
+                int spk = RUG_RISES;
                 if (TOTING(RUG))
                     spk = RUG_WIGGLES;
                 if (obj == RUBY)
@@ -476,7 +478,7 @@ static int discard(token_t verb, token_t obj, bool just_do_it)
                     /* FIXME: Arithmetic on state numbers */
                     int k = 2 - game.prop[RUG];
                     game.prop[RUG] = k;
-                    if (k == 2)
+                    if (k == RUG_HOVER)
                         k = objects[SAPPH].plac;
                     move(RUG + NOBJECTS, k);
                 }
@@ -501,18 +503,17 @@ static int discard(token_t verb, token_t obj, bool just_do_it)
                    game.loc == objects[PILLOW].plac) {
             rspeak(OK_MAN);
         } else {
-            game.prop[VASE] = VASE_BROKEN;
-            if (AT(PILLOW))
-                game.prop[VASE] = VASE_WHOLE;
-            pspeak(VASE, look, game.prop[VASE] + 1, true);
+	    state_change(VASE, AT(PILLOW)
+			 ? VASE_WHOLE
+			 : VASE_DROPPED);
             if (game.prop[VASE] != VASE_WHOLE)
-                game.fixed[VASE] = -1;
+                game.fixed[VASE] = IS_FIXED;
         }
     }
     int k = LIQUID();
     if (k == obj)
         obj = BOTTLE;
-    if (obj == BOTTLE && k != 0)
+    if (obj == BOTTLE && k != NO_OBJECT)
         game.place[k] = LOC_NOWHERE;
     if (obj == CAGE && game.prop[BIRD] == BIRD_CAGED)
         drop(BIRD, game.loc);
@@ -546,9 +547,8 @@ static int drink(token_t verb, token_t obj)
         return GO_CLEAROBJ;
     }
     if (LIQUID() == WATER && HERE(BOTTLE)) {
-        game.prop[BOTTLE] = EMPTY_BOTTLE;
         game.place[WATER] = LOC_NOWHERE;
-        rspeak(BOTTLE_EMPTY);
+        state_change(BOTTLE, EMPTY_BOTTLE);
         return GO_CLEAROBJ;
     }
 
@@ -660,8 +660,8 @@ static int feed(token_t verb, token_t obj)
         if (HERE(FOOD)) {
             DESTROY(FOOD);
             game.prop[BEAR] = SITTING_BEAR;
-            game.fixed[AXE] = 0;
-            game.prop[AXE] = 0;
+            game.fixed[AXE] = IS_FREE;
+            game.prop[AXE] = AXE_HERE;
             spk = BEAR_TAMED;
         }
     } else if (obj == OGRE) {
@@ -689,8 +689,8 @@ int fill(token_t verb, token_t obj)
         }
         rspeak(SHATTER_VASE);
         game.prop[VASE] = VASE_BROKEN;
-        game.fixed[VASE] = -1;
-        return (discard(verb, obj, true));
+        game.fixed[VASE] = IS_FIXED;
+        return (discard(verb, VASE, true));
     }
 
     if (obj == URN) {
@@ -741,13 +741,11 @@ int fill(token_t verb, token_t obj)
         return GO_CLEAROBJ;
     }
 
-    game.prop[BOTTLE] = (LIQLOC(game.loc) == OIL) ? OIL_BOTTLE : WATER_BOTTLE;
+    state_change(BOTTLE, (LIQLOC(game.loc) == OIL)
+		 ? OIL_BOTTLE
+		 : WATER_BOTTLE);
     if (TOTING(BOTTLE))
         game.place[LIQUID()] = CARRIED;
-    if (LIQUID() == OIL)
-        rspeak(BOTTLED_OIL);
-    else
-        rspeak(BOTTLED_WATER);
     return GO_CLEAROBJ;
 }
 
@@ -805,10 +803,10 @@ static int fly(token_t verb, token_t obj)
     /* FIXME: Arithmetic on location values */
     game.newloc = game.place[RUG] + game.fixed[RUG] - game.loc;
 
-    if (game.prop[SAPPH] >= 0) {
-        rspeak(RUG_RETURNS);
-    } else {
+    if (game.prop[SAPPH] == STATE_NOTFOUND) {
         rspeak(RUG_GOES);
+    } else {
+        rspeak(RUG_RETURNS);
     }
     return GO_TERMINATE;
 }
@@ -871,7 +869,7 @@ static int light(token_t verb, token_t obj)
 }
 
 static int listen(void)
-/*  Listen.  Intransitive only.  Print stuff based on objsnd/locsnd. */
+/*  Listen.  Intransitive only.  Print stuff based on object sound proprties. */
 {
     long sound = locations[game.loc].sound;
     if (sound != SILENT) {
@@ -891,8 +889,7 @@ static int listen(void)
         long packed_zzword = token_to_packed(game.zzword);
         pspeak(i, hear, mi, true, packed_zzword);
         rspeak(NO_MESSAGE);
-        /* FIXME: Magic number, sensitive to bird state logic */
-        if (i == BIRD && game.prop[i] == 5)
+        if (i == BIRD && mi == BIRD_ENDSTATE)
             DESTROY(BIRD);
         return GO_CLEAROBJ;
     }
@@ -946,8 +943,24 @@ static int lock(token_t verb, token_t obj)
 
     switch (obj) {
     case CLAM:
+        if (verb == LOCK)
+            rspeak(HUH_MAN);
+        else if (!TOTING(TRIDENT))
+            rspeak(OYSTER_OPENER);
+        else {
+            DESTROY(CLAM);
+            drop(OYSTER, game.loc);
+            drop(PEARL, LOC_CULDESAC);
+            rspeak(PEARL_FALLS);
+        }
+        return GO_CLEAROBJ;
     case OYSTER:
-        return bivalve(verb, obj);
+        if (verb == LOCK)
+            rspeak(HUH_MAN);
+        else
+            rspeak(OYSTER_OPENER);
+
+        return GO_CLEAROBJ;
     case DOOR:
         rspeak((game.prop[DOOR] == DOOR_UNRUSTED) ? OK_MAN : RUSTY_DOOR);
         break;
@@ -993,14 +1006,14 @@ static int pour(token_t verb, token_t obj)
     }
     if (!AT(DOOR)) {
         if (obj == WATER) {
-	    /* cycle through the three plant states */
-	    state_change(PLANT, MOD(game.prop[PLANT] + 1, 3));
-	    game.prop[PLANT2] = game.prop[PLANT];
-	    return GO_MOVE;
+            /* cycle through the three plant states */
+            state_change(PLANT, MOD(game.prop[PLANT] + 1, 3));
+            game.prop[PLANT2] = game.prop[PLANT];
+            return GO_MOVE;
         } else {
             rspeak(SHAKING_LEAVES);
             return GO_CLEAROBJ;
-	}
+        }
     } else {
         state_change(DOOR, (obj == OIL) ?
                      DOOR_UNRUSTED :
@@ -1052,9 +1065,8 @@ static int reservoir(void)
         rspeak(NOTHING_HAPPENS);
         return GO_CLEAROBJ;
     } else {
-        /* FIXME: Arithmetic on state numbers */
-        pspeak(RESER, look, game.prop[RESER] + 1, true);
-        game.prop[RESER] = 1 - game.prop[RESER];
+        state_change(RESER,
+                     game.prop[RESER] == WATERS_PARTED ? WATERS_UNPARTED : WATERS_PARTED);
         if (AT(RESER))
             return GO_CLEAROBJ;
         else {
@@ -1094,7 +1106,6 @@ static int say(struct command_t *command)
     char word1[TOKLEN + 1];
     packed_to_token(command->wd1, word1);
     int wd = (int) get_vocab_id(word1);
-    /* FIXME: magic numbers */
     if (wd == MOTION_WORD(XYZZY) ||
         wd == MOTION_WORD(PLUGH) ||
         wd == MOTION_WORD(PLOVER) ||
@@ -1121,8 +1132,6 @@ static int throw (struct command_t *command)
  *  (Only way to do so!)  Axe also special for dragon, bear, and
  *  troll.  Treasures special for troll. */
 {
-    if (TOTING(ROD2) && command->obj == ROD && !TOTING(ROD))
-        command->obj = ROD2;
     if (!TOTING(command->obj)) {
         rspeak(actions[command->verb].message);
         return GO_CLEAROBJ;
@@ -1156,7 +1165,7 @@ static int throw (struct command_t *command)
             else if (HERE(BEAR) && game.prop[BEAR] == UNTAMED_BEAR) {
                 /* This'll teach him to throw the axe at the bear! */
                 drop(AXE, game.loc);
-                game.fixed[AXE] = -1;
+                game.fixed[AXE] = IS_FIXED;
                 juggle(BEAR);
                 state_change(AXE, AXE_LOST);
                 return GO_CLEAROBJ;
@@ -1208,7 +1217,7 @@ static int wave(token_t verb, token_t obj)
 
     if (game.prop[BIRD] == BIRD_UNCAGED && game.loc == game.place[STEPS] && game.prop[JADE] < 0) {
         drop(JADE, game.loc);
-        game.prop[JADE] = 0;
+        game.prop[JADE] = STATE_FOUND;
         --game.tally;
         rspeak(NECKLACE_FLY);
         return GO_CLEAROBJ;
@@ -1231,9 +1240,8 @@ static int wave(token_t verb, token_t obj)
                    CAGE_FLY :
                    FREE_FLY);
 
-        /* FIXME: Arithemetic on property values */
-        game.prop[FISSURE] = 1 - game.prop[FISSURE];
-        pspeak(FISSURE, look, 2 - game.prop[FISSURE], true);
+        state_change(FISSURE,
+                     game.prop[FISSURE] == BRIDGED ? UNBRIDGED : BRIDGED);
         return GO_CLEAROBJ;
     }
 }
@@ -1304,7 +1312,7 @@ int action(struct command_t *command)
             return GO_WORD2;
         if (command->verb == SAY)
             command->obj = command->wd2;
-        if (command->obj == 0 ||
+        if (command->obj == NO_OBJECT ||
             command->obj == INTRANSITIVE) {
             /*  Analyse an intransitive verb (ie, no object given yet). */
             switch (command->verb) {