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Overview
Comment:Add instructions to read/write more variables (including the special case of Density), and add NoIgnore() on writes
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA1: 2710ac5f6c5324c8af51a41b0f76c64c36a222b5
User & Date: user on 2020-12-11 18:25:55
Other Links: manifest | tags
Context
2020-12-11
18:51
Implement the instructions for message local variables, and fix a mistake in the level loading check-in: 442c84b49d user: user tags: trunk
18:25
Add instructions to read/write more variables (including the special case of Density), and add NoIgnore() on writes check-in: 2710ac5f6c user: user tags: trunk
03:22
Implement more instructions, and fix v_send_message so that it doesn't crash if the target is 0 check-in: 5b1c214aab user: user tags: trunk
Changes
Hide Diffs Side-by-Side Diffs Ignore Whitespace Patch

Modified exec.c from [db44bf14be] to [c6671d8ce7].

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static void change_shape(Uint32 n,int d,int v) {
  v&=3;
  v<<=d+d;
  v|=objects[n]->shape&~(3<<(d+d));
  objects[n]->shape=v;
}

static void sink(Uint32 x,Uint32 y) {
  // Before, x(o) was above y(p); now make y(p) above x(o)
  Object*o=objects[x];
  Object*p=objects[y];
  Value v;
  p->up=o->up;
  o->down=p->down;
  o->up=y;
  p->down=x;
  if(!(o->oflags&p->oflags&OF_VISUALONLY)) v=send_message(x,y,MSG_FLOATED,NVALUE(0),NVALUE(0),NVALUE(0));
  if(!(o->oflags&p->oflags&OF_VISUALONLY)) send_message(y,x,MSG_SUNK,NVALUE(0),NVALUE(0),v);
}

static void change_density(Uint32 n,Sint32 v) {
  Object*o=objects[n];
  Uint32 i;
  if(v<o->density) {
    o->density=v;
    for(;;) {
      i=o->up;
      if(i==VOIDLINK || objects[i]->density<=v) return;
      sink(i,n);
    }
  } else if(v>o->density) {
    o->density=v;
    for(;;) {
      i=o->down;
      if(i==VOIDLINK || objects[i]->density>=v) return;
      sink(n,i);
    }
  }
}

static inline int v_bool(Value v) {
  switch(v.t) {
    case TY_NUMBER: return v.u!=0;
    case TY_SOUND: case TY_USOUND: Throw("Cannot convert sound to boolean");
    default: return 1;
  }
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    case 0x4000 ... 0x7FFF: StackReq(0,1); Push(CVALUE(code[ptr-1]-0x4000)); break;
    case 0x87E8 ... 0x87FF: StackReq(0,1); Push(NVALUE(1UL<<(code[ptr-1]&31))); break;
    case 0xC000 ... 0xFFFF: StackReq(0,1); Push(MVALUE((code[ptr-1]&0x3FFF)+256)); break;
    case OP_ADD: StackReq(2,1); t2=Pop(); Numeric(t2); t1=Pop(); Numeric(t1); Push(NVALUE(t1.u+t2.u)); break;
    case OP_ANIMATE: StackReq(4,0); t4=Pop(); Numeric(t4); t3=Pop(); Numeric(t3); t2=Pop(); Numeric(t2); t1=Pop(); Numeric(t1); animate(obj,t1.u,t2.u,t3.u,t4.u); break;
    case OP_ARRIVALS: StackReq(0,1); Push(NVALUE(o->arrivals&0x1FFFFFF)); break;
    case OP_ARRIVALS_C: StackReq(1,1); Push(GetVariableOrAttributeOf(arrivals&0x1FFFFFF,NVALUE)); break;
    case OP_ARRIVALS_E: StackReq(1,0); t1=Pop(); Numeric(t1); o->arrivals=t1.u; break;
    case OP_ARRIVALS_EC: StackReq(1,0); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) objects[i]->arrivals=t1.u; break;
    case OP_ARRIVALS_E: NoIgnore(); StackReq(1,0); t1=Pop(); Numeric(t1); o->arrivals=t1.u; break;
    case OP_ARRIVALS_EC: NoIgnore(); StackReq(2,0); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) objects[i]->arrivals=t1.u; break;
    case OP_ARRIVED: StackReq(0,1); Push(NVALUE(o->arrived&0x1FFFFFF)); break;
    case OP_ARRIVED_C: StackReq(1,1); Push(GetVariableOf(arrived&0x1FFFFFF,NVALUE)); break;
    case OP_ARRIVED_E: StackReq(1,0); t1=Pop(); Numeric(t1); o->arrived=t1.u; break;
    case OP_ARRIVED_EC: StackReq(1,0); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) objects[i]->arrived=t1.u; break;
    case OP_ARRIVED_E: NoIgnore(); StackReq(1,0); t1=Pop(); Numeric(t1); o->arrived=t1.u; break;
    case OP_ARRIVED_EC: NoIgnore(); StackReq(2,0); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) objects[i]->arrived=t1.u; break;
    case OP_BAND: StackReq(2,1); t2=Pop(); Numeric(t2); t1=Pop(); Numeric(t1); Push(NVALUE(t1.u&t2.u)); break;
    case OP_BNOT: StackReq(1,1); t1=Pop(); Numeric(t1); Push(NVALUE(~t1.u)); break;
    case OP_BOR: StackReq(2,1); t2=Pop(); Numeric(t2); t1=Pop(); Numeric(t1); Push(NVALUE(t1.u|t2.u)); break;
    case OP_BROADCAST: StackReq(4,1); t4=Pop(); t3=Pop(); t2=Pop(); t1=Pop(); Push(v_broadcast(obj,t1,t2,t3,t4,NVALUE(0),0)); break;
    case OP_BROADCAST_D: StackReq(4,0); t4=Pop(); t3=Pop(); t2=Pop(); t1=Pop(); v_broadcast(obj,t1,t2,t3,t4,NVALUE(0),0); break;
    case OP_BROADCASTCLASS: StackReq(3,1); t4=Pop(); t3=Pop(); t2=Pop(); Push(v_broadcast(obj,CVALUE(code[ptr++]),t2,t3,t4,NVALUE(0),0)); break;
    case OP_BROADCASTEX: StackReq(5,1); t5=Pop(); t4=Pop(); t3=Pop(); t2=Pop(); t1=Pop(); Push(v_broadcast(obj,t1,t2,t3,t4,t5,0)); break;
    case OP_BROADCASTEX_D: StackReq(5,0); t5=Pop(); t4=Pop(); t3=Pop(); t2=Pop(); t1=Pop(); v_broadcast(obj,t1,t2,t3,t4,t5,0); break;
    case OP_BROADCASTSUM: StackReq(4,1); t4=Pop(); t3=Pop(); t2=Pop(); t1=Pop(); Push(v_broadcast(obj,t1,t2,t3,t4,NVALUE(0),1)); break;
    case OP_BROADCASTSUMEX: StackReq(5,1); t5=Pop(); t4=Pop(); t3=Pop(); t2=Pop(); t1=Pop(); Push(v_broadcast(obj,t1,t2,t3,t4,t5,1)); break;
    case OP_BXOR: StackReq(2,1); t2=Pop(); Numeric(t2); t1=Pop(); Numeric(t1); Push(NVALUE(t1.u^t2.u)); break;
    case OP_CALLSUB: execute_program(code,code[ptr++],obj); break;
    case OP_CLASS: StackReq(0,1); Push(CVALUE(o->class)); break;
    case OP_CLASS_C: StackReq(1,1); Push(GetVariableOf(class,CVALUE)); break;
    case OP_CLIMB: StackReq(0,1); Push(NVALUE(o->climb)); break;
    case OP_CLIMB_C: StackReq(1,1); Push(GetVariableOrAttributeOf(climb,NVALUE)); break;
    case OP_CLIMB_E: NoIgnore(); StackReq(1,0); t1=Pop(); Numeric(t1); o->climb=t1.u; break;
    case OP_CLIMB_E16: NoIgnore(); StackReq(1,0); t1=Pop(); Numeric(t1); o->climb=t1.u&0xFFFF; break;
    case OP_CLIMB_EC: NoIgnore(); StackReq(2,0); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) o->climb=t1.u; break;
    case OP_CLIMB_EC16: NoIgnore(); StackReq(2,0); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) o->climb=t1.u; break;
    case OP_DENSITY: StackReq(0,1); Push(NVALUE(o->density)); break;
    case OP_DENSITY_C: StackReq(1,1); Push(GetVariableOrAttributeOf(density,NVALUE)); break;
    case OP_DENSITY_E: NoIgnore(); StackReq(1,0); t1=Pop(); Numeric(t1); change_density(obj,t1.s); break;
    case OP_DENSITY_E16: NoIgnore(); StackReq(1,0); t1=Pop(); Numeric(t1); change_density(obj,t1.s&0xFFFF); break;
    case OP_DENSITY_EC: NoIgnore(); StackReq(2,0); t1=Pop(); Numeric(t1); change_density(v_object(Pop()),t1.s); break;
    case OP_DENSITY_EC16: NoIgnore(); StackReq(2,0); t1=Pop(); Numeric(t1); change_density(v_object(Pop()),t1.s&0xFFFF); break;
    case OP_DEPARTED: StackReq(0,1); Push(NVALUE(o->departed&0x1FFFFFF)); break;
    case OP_DEPARTED_C: StackReq(1,1); Push(GetVariableOf(departed&0x1FFFFFF,NVALUE)); break;
    case OP_DEPARTED_E: StackReq(1,0); t1=Pop(); Numeric(t1); o->departed=t1.u; break;
    case OP_DEPARTED_EC: StackReq(1,0); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) objects[i]->departed=t1.u; break;
    case OP_DEPARTED_E: NoIgnore(); StackReq(1,0); t1=Pop(); Numeric(t1); o->departed=t1.u; break;
    case OP_DEPARTED_EC: NoIgnore(); StackReq(2,0); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) objects[i]->departed=t1.u; break;
    case OP_DEPARTURES: StackReq(0,1); Push(NVALUE(o->departures&0x1FFFFFF)); break;
    case OP_DEPARTURES_C: StackReq(1,1); Push(GetVariableOrAttributeOf(departures&0x1FFFFFF,NVALUE)); break;
    case OP_DEPARTURES_E: StackReq(1,0); t1=Pop(); Numeric(t1); o->departures=t1.u; break;
    case OP_DEPARTURES_EC: StackReq(1,0); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) objects[i]->departures=t1.u; break;
    case OP_DEPARTURES_E: NoIgnore(); StackReq(1,0); t1=Pop(); Numeric(t1); o->departures=t1.u; break;
    case OP_DEPARTURES_EC: NoIgnore(); StackReq(2,0); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) objects[i]->departures=t1.u; break;
    case OP_DIR: StackReq(0,1); Push(NVALUE(o->dir)); break;
    case OP_DIR_C: StackReq(1,1); Push(GetVariableOf(dir,NVALUE)); break;
    case OP_DIR_E: StackReq(1,0); t1=Pop(); Numeric(t1); o->dir=resolve_dir(obj,t1.u); break;
    case OP_DIR_EC: StackReq(2,0); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) objects[i]->dir=resolve_dir(i,t1.u); break;
    case OP_DIR_E: NoIgnore(); StackReq(1,0); t1=Pop(); Numeric(t1); o->dir=resolve_dir(obj,t1.u); break;
    case OP_DIR_EC: NoIgnore(); StackReq(2,0); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) objects[i]->dir=resolve_dir(i,t1.u); break;
    case OP_DISTANCE: StackReq(0,1); Push(NVALUE(o->distance)); break;
    case OP_DISTANCE_C: StackReq(1,1); Push(GetVariableOf(distance,NVALUE)); break;
    case OP_DISTANCE_E: StackReq(1,0); t1=Pop(); Numeric(t1); o->distance=t1.u; break;
    case OP_DISTANCE_EC: StackReq(2,0); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) objects[i]->distance=t1.u; break;
    case OP_DISTANCE_E: NoIgnore(); StackReq(1,0); t1=Pop(); Numeric(t1); o->distance=t1.u; break;
    case OP_DISTANCE_EC: NoIgnore(); StackReq(2,0); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) objects[i]->distance=t1.u; break;
    case OP_DIV: StackReq(2,1); t2=Pop(); DivideBy(t2); t1=Pop(); Numeric(t1); Push(NVALUE(t1.u/t2.u)); break;
    case OP_DIV_C: StackReq(2,1); t2=Pop(); DivideBy(t2); t1=Pop(); Numeric(t1); Push(NVALUE(t1.s/t2.s)); break;
    case OP_DROP: StackReq(1,0); Pop(); break;
    case OP_DROP_D: StackReq(2,0); Pop(); Pop(); break;
    case OP_DUP: StackReq(1,2); t1=Pop(); Push(t1); Push(t1); break;
    case OP_EQ: StackReq(2,1); t2=Pop(); t1=Pop(); Push(NVALUE(v_equal(t1,t2)?1:0)); break;
    case OP_GE: StackReq(2,1); t2=Pop(); t1=Pop(); Push(NVALUE(v_unsigned_greater(t2,t1)?0:1)); break;
    case OP_GE_C: StackReq(2,1); t2=Pop(); t1=Pop(); Push(NVALUE(v_signed_greater(t2,t1)?0:1)); break;
    case OP_GOTO: ptr=code[ptr]; break;
    case OP_GT: StackReq(2,1); t2=Pop(); t1=Pop(); Push(NVALUE(v_unsigned_greater(t1,t2)?1:0)); break;
    case OP_GT_C: StackReq(2,1); t2=Pop(); t1=Pop(); Push(NVALUE(v_signed_greater(t1,t2)?1:0)); break;
    case OP_HARD: StackReq(1,1); j=v_sh_dir(Pop()); Push(NVALUE(o->hard[j])); break;
    case OP_HARD_C: StackReq(2,1); j=v_sh_dir(Pop()); Push(GetVariableOrAttributeOf(hard[j],NVALUE)); break;
    case OP_HARD_E: StackReq(2,0); j=v_sh_dir(Pop()); t1=Pop(); Numeric(t1); o->hard[j]=t1.u; break;
    case OP_HARD_EC: StackReq(3,0); j=v_sh_dir(Pop()); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) objects[i]->hard[j]=t1.u; break;
    case OP_HARD_E: NoIgnore(); StackReq(2,0); j=v_sh_dir(Pop()); t1=Pop(); Numeric(t1); o->hard[j]=t1.u; break;
    case OP_HARD_EC: NoIgnore(); StackReq(3,0); j=v_sh_dir(Pop()); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) objects[i]->hard[j]=t1.u; break;
    case OP_HEIGHT: StackReq(0,1); Push(NVALUE(o->height)); break;
    case OP_HEIGHT_C: StackReq(1,1); Push(GetVariableOrAttributeOf(height,NVALUE)); break;
    case OP_HEIGHT_E: NoIgnore(); StackReq(1,0); t1=Pop(); Numeric(t1); o->height=t1.u; break;
    case OP_HEIGHT_E16: NoIgnore(); StackReq(1,0); t1=Pop(); Numeric(t1); o->height=t1.u&0xFFFF; break;
    case OP_HEIGHT_EC: NoIgnore(); StackReq(2,0); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) o->height=t1.u; break;
    case OP_HEIGHT_EC16: NoIgnore(); StackReq(2,0); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) o->height=t1.u; break;
    case OP_IF: StackReq(1,0); if(v_bool(Pop())) ptr++; else ptr=code[ptr]; break;
    case OP_IMAGE: StackReq(0,1); Push(NVALUE(o->image)); break;
    case OP_IMAGE_C: StackReq(1,1); Push(GetVariableOf(image,NVALUE)); break;
    case OP_IMAGE_E: StackReq(1,0); t1=Pop(); Numeric(t1); o->image=t1.u; break;
    case OP_IMAGE_EC: StackReq(2,0); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) objects[i]->image=t1.u; break;
    case OP_IMAGE_E: NoIgnore(); StackReq(1,0); t1=Pop(); Numeric(t1); o->image=t1.u; break;
    case OP_IMAGE_EC: NoIgnore(); StackReq(2,0); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) objects[i]->image=t1.u; break;
    case OP_INT16: StackReq(0,1); Push(NVALUE(code[ptr++])); break;
    case OP_INT32: StackReq(0,1); t1=UVALUE(code[ptr++]<<16,TY_NUMBER); t1.u|=code[ptr++]; Push(t1); break;
    case OP_KEY: StackReq(0,1); Push(NVALUE(current_key)); break;
    case OP_LAND: StackReq(2,1); t1=Pop(); t2=Pop(); if(v_bool(t1) && v_bool(t2)) Push(NVALUE(1)); else Push(NVALUE(0)); break;
    case OP_LE: StackReq(2,1); t2=Pop(); t1=Pop(); Push(NVALUE(v_unsigned_greater(t1,t2)?0:1)); break;
    case OP_LE_C: StackReq(2,1); t2=Pop(); t1=Pop(); Push(NVALUE(v_signed_greater(t1,t2)?0:1)); break;
    case OP_LNOT: StackReq(1,1); if(v_bool(Pop())) Push(NVALUE(0)); else Push(NVALUE(1)); break;
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    case OP_SEND_CD: StackReq(4,0); t4=Pop(); t3=Pop(); t2=Pop(); t1=Pop(); v_send_message(obj,t1,t2,t3,t4,NVALUE(0)); break;
    case OP_SENDEX: StackReq(4,1); t5=Pop(); t4=Pop(); t3=Pop(); t2=Pop(); Push(v_send_self(obj,t2,t3,t4,t5)); break;
    case OP_SENDEX_C: StackReq(5,1); t5=Pop(); t4=Pop(); t3=Pop(); t2=Pop(); t1=Pop(); Push(v_send_message(obj,t1,t2,t3,t4,t5)); break;
    case OP_SENDEX_D: StackReq(4,0); t5=Pop(); t4=Pop(); t3=Pop(); t2=Pop(); v_send_self(obj,t2,t3,t4,t5); break;
    case OP_SENDEX_CD: StackReq(5,0); t5=Pop(); t4=Pop(); t3=Pop(); t2=Pop(); t1=Pop(); v_send_message(obj,t1,t2,t3,t4,t5); break;
    case OP_SHAPE: StackReq(0,1); Push(NVALUE(o->shape)); break;
    case OP_SHAPE_C: StackReq(1,1); Push(GetVariableOrAttributeOf(shape,NVALUE)); break;
    case OP_SHAPE_E: StackReq(1,0); t1=Pop(); Numeric(t1); o->shape=t1.u; break;
    case OP_SHAPE_EC: StackReq(2,0); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) objects[i]->shape=t1.u; break;
    case OP_SHAPE_E: NoIgnore(); StackReq(1,0); t1=Pop(); Numeric(t1); o->shape=t1.u; break;
    case OP_SHAPE_EC: NoIgnore(); StackReq(2,0); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) objects[i]->shape=t1.u; break;
    case OP_SHAPEDIR: StackReq(1,1); j=v_sh_dir(Pop()); Push(NVALUE((o->shape>>(j+j))&3)); break;
    case OP_SHAPEDIR_C: StackReq(2,1); j=v_sh_dir(Pop()); t1=GetVariableOrAttributeOf(sharp[j],NVALUE); t1.u=(t1.u>>(j+j))&3; Push(t1); break;
    case OP_SHAPEDIR_E: StackReq(2,0); j=v_sh_dir(Pop()); t1=Pop(); Numeric(t1); change_shape(obj,j,t1.u); break;
    case OP_SHAPEDIR_EC: StackReq(3,0); j=v_sh_dir(Pop()); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) change_shape(i,j,t1.u); break;
    case OP_SHAPEDIR_E: NoIgnore(); StackReq(2,0); j=v_sh_dir(Pop()); t1=Pop(); Numeric(t1); change_shape(obj,j,t1.u); break;
    case OP_SHAPEDIR_EC: NoIgnore(); StackReq(3,0); j=v_sh_dir(Pop()); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) change_shape(i,j,t1.u); break;
    case OP_SHARP: StackReq(1,1); j=v_sh_dir(Pop()); Push(NVALUE(o->sharp[j])); break;
    case OP_SHARP_C: StackReq(2,1); j=v_sh_dir(Pop()); Push(GetVariableOrAttributeOf(sharp[j],NVALUE)); break;
    case OP_SHARP_E: StackReq(2,0); j=v_sh_dir(Pop()); t1=Pop(); Numeric(t1); o->sharp[j]=t1.u; break;
    case OP_SHARP_EC: StackReq(3,0); j=v_sh_dir(Pop()); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) objects[i]->sharp[j]=t1.u; break;
    case OP_SHARP_E: NoIgnore(); StackReq(2,0); j=v_sh_dir(Pop()); t1=Pop(); Numeric(t1); o->sharp[j]=t1.u; break;
    case OP_SHARP_EC: NoIgnore(); StackReq(3,0); j=v_sh_dir(Pop()); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) objects[i]->sharp[j]=t1.u; break;
    case OP_SHOVABLE: StackReq(0,1); Push(NVALUE(o->shovable)); break;
    case OP_SHOVABLE_C: StackReq(1,1); Push(GetVariableOrAttributeOf(shovable,NVALUE)); break;
    case OP_SHOVABLE_E: StackReq(1,0); t1=Pop(); Numeric(t1); o->shovable=t1.u; break;
    case OP_SHOVABLE_EC: StackReq(2,0); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) objects[i]->shovable=t1.u; break;
    case OP_SHOVABLE_E: NoIgnore(); StackReq(1,0); t1=Pop(); Numeric(t1); o->shovable=t1.u; break;
    case OP_SHOVABLE_EC: NoIgnore(); StackReq(2,0); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) objects[i]->shovable=t1.u; break;
    case OP_STRENGTH: StackReq(0,1); Push(NVALUE(o->strength)); break;
    case OP_STRENGTH_C: StackReq(1,1); Push(GetVariableOrAttributeOf(strength,NVALUE)); break;
    case OP_STRENGTH_E: NoIgnore(); StackReq(1,0); t1=Pop(); Numeric(t1); o->strength=t1.u; break;
    case OP_STRENGTH_E16: NoIgnore(); StackReq(1,0); t1=Pop(); Numeric(t1); o->strength=t1.u&0xFFFF; break;
    case OP_STRENGTH_EC: NoIgnore(); StackReq(2,0); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) o->strength=t1.u; break;
    case OP_STRENGTH_EC16: NoIgnore(); StackReq(2,0); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) o->strength=t1.u; break;
    case OP_SOUND: StackReq(2,0); t2=Pop(); t1=Pop(); break; // Sound not implemented at this time
    case OP_SUB: StackReq(2,1); t2=Pop(); Numeric(t2); t1=Pop(); Numeric(t1); Push(NVALUE(t1.u-t2.u)); break;
    case OP_SWAP: StackReq(2,2); t1=Pop(); t2=Pop(); Push(t1); Push(t2); break;
    case OP_TRACE: StackReq(3,0); trace_stack(obj); break;
    case OP_WEIGHT: StackReq(0,1); Push(NVALUE(o->weight)); break;
    case OP_WEIGHT_C: StackReq(1,1); Push(GetVariableOrAttributeOf(weight,NVALUE)); break;
    case OP_WEIGHT_E: NoIgnore(); StackReq(1,0); t1=Pop(); Numeric(t1); o->weight=t1.u; break;
    case OP_WEIGHT_E16: NoIgnore(); StackReq(1,0); t1=Pop(); Numeric(t1); o->weight=t1.u&0xFFFF; break;
    case OP_WEIGHT_EC: NoIgnore(); StackReq(2,0); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) o->weight=t1.u; break;
    case OP_WEIGHT_EC16: NoIgnore(); StackReq(2,0); t1=Pop(); Numeric(t1); i=v_object(Pop()); if(i!=VOIDLINK) o->weight=t1.u; break;
    case OP_WINLEVEL: key_ignored=0; gameover=1; Throw(0); break;
    case OP_XLOC: StackReq(0,1); Push(NVALUE(o->x)); break;
    case OP_YLOC: StackReq(0,1); Push(NVALUE(o->y)); break;
#define MiscVar(a,b) \
    case a: StackReq(0,1); Push(o->b); break; \
    case a+0x0800: StackReq(1,1); Push(GetVariableOf(b,)); break; \
    case a+0x1000: StackReq(1,0); o->b=Pop(); break; \
    case a+0x1001: StackReq(1,0); t1=Pop(); if(!t1.t) t1.u&=0xFFFF; o->b=t1; break; \
    case a+0x1800: StackReq(2,0); t1=Pop(); i=v_object(Pop()); if(i!=VOIDLINK) objects[i]->b=t1; break; \
    case a+0x1801: StackReq(2,0); t1=Pop(); if(!t1.t) t1.u&=0xFFFF; i=v_object(Pop()); if(i!=VOIDLINK) objects[i]->b=t1; break;
    case a+0x1000: NoIgnore(); StackReq(1,0); o->b=Pop(); break; \
    case a+0x1001: NoIgnore(); StackReq(1,0); t1=Pop(); if(!t1.t) t1.u&=0xFFFF; o->b=t1; break; \
    case a+0x1800: NoIgnore(); StackReq(2,0); t1=Pop(); i=v_object(Pop()); if(i!=VOIDLINK) objects[i]->b=t1; break; \
    case a+0x1801: NoIgnore(); StackReq(2,0); t1=Pop(); if(!t1.t) t1.u&=0xFFFF; i=v_object(Pop()); if(i!=VOIDLINK) objects[i]->b=t1; break;
    MiscVar(OP_MISC1,misc1) MiscVar(OP_MISC2,misc2) MiscVar(OP_MISC3,misc3)
#undef GetVariableOf
#define GetVariableOf(a,b) GetVariableOrAttributeOf(a,b)
    MiscVar(OP_MISC4,misc4) MiscVar(OP_MISC5,misc5) MiscVar(OP_MISC6,misc6) MiscVar(OP_MISC7,misc7)
#undef MiscVar
#undef GetVariableOf
    default: fprintf(stderr,"Unrecognized opcode 0x%04X at 0x%04X in $%s\n",code[ptr-1],ptr-1,classes[o->class]->name); Throw("Internal error: Unrecognized opcode");
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