Fixed feed command and white space in tests
[open-adventure.git] / actions.c
index 1c52d28f9c2bfeb741960290162ef5d17fa27701..5ead1f22d234ed0e259a3d5981c09af74829ff8d 100644 (file)
--- a/actions.c
+++ b/actions.c
@@ -6,12 +6,6 @@
 
 static int fill(token_t, token_t);
 
-static void state_change(long obj, long state)
-{
-    game.prop[obj] = state;
-    pspeak(obj, change, state, true);
-}
-
 static int attack(struct command_t *command)
 /*  Attack.  Assume target if unambiguous.  "Throw" also links here.
  *  Attackable objects fall into two categories: enemies (snake,
@@ -21,7 +15,6 @@ 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 +62,41 @@ 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 +128,53 @@ 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 +221,6 @@ 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 +254,7 @@ 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 +275,6 @@ 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 +288,100 @@ 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);
@@ -395,39 +391,47 @@ static int vcarry(token_t verb, token_t obj)
 static int chain(token_t verb)
 /* Do something to the bear's chain */
 {
-    int spk;
     if (verb != LOCK) {
-        spk = CHAIN_UNLOCKED;
-        if (game.prop[BEAR] == UNTAMED_BEAR)
-            spk = BEAR_BLOCKS;
-        if (game.prop[CHAIN] == CHAIN_HEAP)
-            spk = ALREADY_UNLOCKED;
-        if (spk != CHAIN_UNLOCKED) {
-            rspeak(spk);
+        if (game.prop[BEAR] == UNTAMED_BEAR) {
+            rspeak(BEAR_BLOCKS);
+            return GO_CLEAROBJ;
+        }
+        if (game.prop[CHAIN] == CHAIN_HEAP) {
+            rspeak(ALREADY_UNLOCKED);
             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;
-        /* FIXME: Arithmetic on state numbers */
-        game.fixed[BEAR] = 2 - game.prop[BEAR];
-    } else {
-        spk = CHAIN_LOCKED;
-        if (game.prop[CHAIN] != CHAIN_HEAP)
-            spk = ALREADY_LOCKED;
-        if (game.loc != objects[CHAIN].plac)
-            spk = NO_LOCKSITE;
-        if (spk != CHAIN_LOCKED) {
-            rspeak(spk);
-            return GO_CLEAROBJ;
+
+        switch (game.prop[BEAR]) {
+        case BEAR_DEAD:
+            game.fixed[BEAR] = IS_FIXED;
+            break;
+        default:
+            game.fixed[BEAR] = IS_FREE;
         }
-        game.prop[CHAIN] = CHAIN_FIXED;
-        if (TOTING(CHAIN))
-            drop(CHAIN, game.loc);
-        game.fixed[CHAIN] = -1;
+        rspeak(CHAIN_UNLOCKED);
+        return GO_CLEAROBJ;
     }
-    rspeak(spk);
+
+    if (game.prop[CHAIN] != CHAIN_HEAP) {
+        rspeak(ALREADY_LOCKED);
+        return GO_CLEAROBJ;
+    }
+    if (game.loc != objects[CHAIN].plac) {
+        rspeak(NO_LOCKSITE);
+        return GO_CLEAROBJ;
+    }
+
+    game.prop[CHAIN] = CHAIN_FIXED;
+
+    if (TOTING(CHAIN))
+        drop(CHAIN, game.loc);
+    game.fixed[CHAIN] = IS_FIXED;
+
+    rspeak(CHAIN_LOCKED);
     return GO_CLEAROBJ;
 }
 
@@ -436,12 +440,11 @@ 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)) {
@@ -454,11 +457,11 @@ 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)
@@ -466,9 +469,9 @@ static int discard(token_t verb, token_t obj, bool just_do_it)
                 rspeak(spk);
                 if (spk != RUG_WIGGLES) {
                     /* FIXME: Arithmetic on state numbers */
-                    int k = 2 - game.prop[RUG];
+                    int k = (game.prop[RUG] == RUG_HOVER) ? RUG_FLOOR : RUG_HOVER;
                     game.prop[RUG] = k;
-                    if (k == 2)
+                    if (k == RUG_HOVER)
                         k = objects[SAPPH].plac;
                     move(RUG + NOBJECTS, k);
                 }
@@ -493,18 +496,17 @@ 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);
@@ -521,24 +523,29 @@ static int drink(token_t verb, token_t obj)
 /*  Drink.  If no object, assume water and look for it here.  If water is in
  *  the bottle, drink that, else must be at a water loc, so drink stream. */
 {
-    if (obj == NO_OBJECT && LIQLOC(game.loc) != WATER && (LIQUID() != WATER ||
-            !HERE(BOTTLE)))
+    if (obj == NO_OBJECT && LIQLOC(game.loc) != WATER &&
+        (LIQUID() != WATER || !HERE(BOTTLE))) {
         return GO_UNKNOWN;
-    if (obj != BLOOD) {
-        if (obj != NO_OBJECT && obj != WATER) {
-            rspeak(RIDICULOUS_ATTEMPT);
-        } else if (LIQUID() == WATER && HERE(BOTTLE)) {
-            game.prop[BOTTLE] = EMPTY_BOTTLE;
-            game.place[WATER] = LOC_NOWHERE;
-            rspeak(BOTTLE_EMPTY);
-        } else {
-            rspeak(actions[verb].message);
-        }
-    } else {
+    }
+
+    if (obj == BLOOD) {
         DESTROY(BLOOD);
         state_change(DRAGON, DRAGON_BLOODLESS);
         game.blooded = true;
+        return GO_CLEAROBJ;
+    }
+
+    if (obj != NO_OBJECT && obj != WATER) {
+        rspeak(RIDICULOUS_ATTEMPT);
+        return GO_CLEAROBJ;
     }
+    if (LIQUID() == WATER && HERE(BOTTLE)) {
+        game.place[WATER] = LOC_NOWHERE;
+        state_change(BOTTLE, EMPTY_BOTTLE);
+        return GO_CLEAROBJ;
+    }
+
+    rspeak(actions[verb].message);
     return GO_CLEAROBJ;
 }
 
@@ -582,9 +589,7 @@ static int extinguish(token_t verb, int obj)
             obj = LAMP;
         if (HERE(URN) && game.prop[URN] == URN_LIT)
             obj = URN;
-        if (obj == INTRANSITIVE ||
-            (HERE(LAMP) && game.prop[LAMP] == LAMP_BRIGHT &&
-             HERE(URN) && game.prop[URN] == URN_LIT))
+        if (obj == INTRANSITIVE)
             return GO_UNKNOWN;
     }
 
@@ -594,20 +599,24 @@ static int extinguish(token_t verb, int obj)
         } else {
             pspeak(URN, change, URN_DARK, true);
         }
+        return GO_CLEAROBJ;
+    }
 
-    } else if (obj == LAMP) {
+    if (obj == LAMP) {
         state_change(LAMP, LAMP_DARK);
         rspeak(DARK(game.loc) ?
                PITCH_DARK :
                NO_MESSAGE);
+        return GO_CLEAROBJ;
+    }
 
-    } else if (obj == DRAGON ||
-               obj == VOLCANO) {
+    if (obj == DRAGON ||
+        obj == VOLCANO) {
         rspeak(BEYOND_POWER);
-
-    } else {
-        rspeak(actions[verb].message);
+        return GO_CLEAROBJ;
     }
+
+    rspeak(actions[verb].message);
     return GO_CLEAROBJ;
 }
 
@@ -615,46 +624,58 @@ static int feed(token_t verb, token_t obj)
 /*  Feed.  If bird, no seed.  Snake, dragon, troll: quip.  If dwarf, make him
  *  mad.  Bear, special. */
 {
-    int spk = actions[verb].message;
-    if (obj == BIRD) {
+    switch (obj) {
+    case BIRD:
         rspeak(BIRD_PINING);
-        return GO_CLEAROBJ;
-    } else if (obj == SNAKE ||
-               obj == DRAGON ||
-               obj == TROLL) {
-        spk = NOTHING_EDIBLE;
-        if (obj == DRAGON && game.prop[DRAGON] != DRAGON_BARS)
-            spk = RIDICULOUS_ATTEMPT;
-        if (obj == TROLL)
-            spk = TROLL_VICES;
-        if (obj == SNAKE && !game.closed && HERE(BIRD)) {
+        break;
+
+    case DRAGON:
+        if (game.prop[DRAGON] != DRAGON_BARS)
+            rspeak(RIDICULOUS_ATTEMPT);
+        else
+            rspeak(NOTHING_EDIBLE);
+        break;
+    case SNAKE:
+        if (!game.closed && HERE(BIRD)) {
             DESTROY(BIRD);
-            spk = BIRD_DEVOURED;
-        }
-    } else if (obj == DWARF) {
+            rspeak(BIRD_DEVOURED);
+        } else
+            rspeak(NOTHING_EDIBLE);
+        break;
+    case TROLL:
+        rspeak(TROLL_VICES);
+        break;
+    case DWARF:
         if (HERE(FOOD)) {
             game.dflag += 2;
-            spk = REALLY_MAD;
+            rspeak(REALLY_MAD);
+        } else
+            rspeak(actions[verb].message);
+        break;
+    case BEAR:
+        if (game.prop[BEAR] == BEAR_DEAD) {
+            rspeak(RIDICULOUS_ATTEMPT);
+            break;
         }
-    } else if (obj == BEAR) {
-        if (game.prop[BEAR] == UNTAMED_BEAR)
-            spk = NOTHING_EDIBLE;
-        if (game.prop[BEAR] == BEAR_DEAD)
-            spk = RIDICULOUS_ATTEMPT;
-        if (HERE(FOOD)) {
-            DESTROY(FOOD);
-            game.prop[BEAR] = SITTING_BEAR;
-            game.fixed[AXE] = 0;
-            game.prop[AXE] = 0;
-            spk = BEAR_TAMED;
+        if (game.prop[BEAR] == UNTAMED_BEAR) {
+            if (HERE(FOOD)) {
+                DESTROY(FOOD);
+                game.fixed[AXE] = IS_FREE;
+                game.prop[AXE] = AXE_HERE;
+                state_change(BEAR, SITTING_BEAR);
+            } else
+                rspeak(NOTHING_EDIBLE);
         }
-    } else if (obj == OGRE) {
+        break;
+    case OGRE:
         if (HERE(FOOD))
-            spk = OGRE_FULL;
-    } else {
-        spk = AM_GAME;
+            rspeak(OGRE_FULL);
+        else
+            rspeak(actions[verb].message);
+        break;
+    default:
+        rspeak(AM_GAME);
     }
-    rspeak(spk);
     return GO_CLEAROBJ;
 }
 
@@ -662,63 +683,74 @@ int fill(token_t verb, token_t obj)
 /*  Fill.  Bottle or urn must be empty, and liquid available.  (Vase
  *  is nasty.) */
 {
-    int k;
-    int spk = actions[verb].message;
     if (obj == VASE) {
-        spk = ARENT_CARRYING;
-        if (LIQLOC(game.loc) == 0)
-            spk = FILL_INVALID;
-        if (LIQLOC(game.loc) == 0 ||
-            !TOTING(VASE)) {
-            rspeak(spk);
+        if (LIQLOC(game.loc) == NO_OBJECT) {
+            rspeak(FILL_INVALID);
+            return GO_CLEAROBJ;
+        }
+        if (!TOTING(VASE)) {
+            rspeak(ARENT_CARRYING);
             return GO_CLEAROBJ;
         }
         rspeak(SHATTER_VASE);
         game.prop[VASE] = VASE_BROKEN;
-        game.fixed[VASE] = -1;
-        return (discard(verb, obj, true));
-    } else if (obj == URN) {
-        spk = FULL_URN;
+        game.fixed[VASE] = IS_FIXED;
+        return (discard(verb, VASE, true));
+    }
+
+    if (obj == URN) {
         if (game.prop[URN] != URN_EMPTY) {
-            rspeak(spk);
+            rspeak(FULL_URN);
             return GO_CLEAROBJ;
         }
-        spk = FILL_INVALID;
-        k = LIQUID();
-        if (k == 0 ||
-            !HERE(BOTTLE)) {
-            rspeak(spk);
+        if (!HERE(BOTTLE)) {
+            rspeak(FILL_INVALID);
             return GO_CLEAROBJ;
         }
-        game.place[k] = LOC_NOWHERE;
-        game.prop[BOTTLE] = EMPTY_BOTTLE;
-        if (k == OIL)
+        int k = LIQUID();
+        switch (k) {
+        case WATER:
+            game.prop[BOTTLE] = EMPTY_BOTTLE;
+            rspeak(WATER_URN);
+            break;
+        case OIL:
             game.prop[URN] = URN_DARK;
-        spk = WATER_URN + game.prop[URN];
-        rspeak(spk);
+            game.prop[BOTTLE] = EMPTY_BOTTLE;
+            rspeak(OIL_URN);
+            break;
+        case NO_OBJECT:
+        default:
+            rspeak(FILL_INVALID);
+            return GO_CLEAROBJ;
+        }
+        game.place[k] = LOC_NOWHERE;
         return GO_CLEAROBJ;
-    } else if (obj != NO_OBJECT && obj != BOTTLE) {
-        rspeak(spk);
+    }
+    if (obj != NO_OBJECT && obj != BOTTLE) {
+        rspeak(actions[verb].message);
         return GO_CLEAROBJ;
-    } else if (obj == NO_OBJECT && !HERE(BOTTLE))
+    }
+    if (obj == NO_OBJECT && !HERE(BOTTLE))
         return GO_UNKNOWN;
-    spk = BOTTLED_WATER;
-    if (LIQLOC(game.loc) == 0)
-        spk = NO_LIQUID;
-    if (HERE(URN) && game.prop[URN] != URN_EMPTY)
-        spk = URN_NOPOUR;
-    if (LIQUID() != 0)
-        spk = BOTTLE_FULL;
-    if (spk == BOTTLED_WATER) {
-        /* FIXME: Arithmetic on property values */
-        game.prop[BOTTLE] = MOD(conditions[game.loc], 4) / 2 * 2;
-        k = LIQUID();
-        if (TOTING(BOTTLE))
-            game.place[k] = CARRIED;
-        if (k == OIL)
-            spk = BOTTLED_OIL;
+
+    if (HERE(URN) && game.prop[URN] != URN_EMPTY) {
+        rspeak(URN_NOPOUR);
+        return GO_CLEAROBJ;
     }
-    rspeak(spk);
+    if (LIQUID() != NO_OBJECT) {
+        rspeak(BOTTLE_FULL);
+        return GO_CLEAROBJ;
+    }
+    if (LIQLOC(game.loc) == NO_OBJECT) {
+        rspeak(NO_LIQUID);
+        return GO_CLEAROBJ;
+    }
+
+    state_change(BOTTLE, (LIQLOC(game.loc) == OIL)
+                 ? OIL_BOTTLE
+                 : WATER_BOTTLE);
+    if (TOTING(BOTTLE))
+        game.place[LIQUID()] = CARRIED;
     return GO_CLEAROBJ;
 }
 
@@ -776,10 +808,10 @@ 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;
 }
@@ -842,7 +874,7 @@ 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) {
@@ -862,8 +894,7 @@ 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;
     }
@@ -917,8 +948,24 @@ 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;
@@ -964,14 +1011,14 @@ 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 :
@@ -1023,9 +1070,8 @@ 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 {
@@ -1065,7 +1111,6 @@ 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) ||
@@ -1092,8 +1137,6 @@ 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;
@@ -1127,7 +1170,7 @@ 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;
@@ -1179,7 +1222,7 @@ 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;
@@ -1202,9 +1245,8 @@ 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;
     }
 }
@@ -1275,7 +1317,7 @@ 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) {