Free Hero Mesh

#define ChangeInst(x) (cl->codes[ptr-1]x,prflag=0)
#define InstFlag(x) (peep<ptr && (prflag&(x)))
#define Inst7bit() (peep<ptr && cl->codes[ptr-1]<0x0080)
#define Inst8bit() (peep<ptr && cl->codes[ptr-1]<0x0100)
#define AbbrevOp(x,y) case x: if(Inst7bit()) ChangeInst(+=0x1000|((y)<<4)); else AddInstF(x,tokent); break
#define FlowPush(x) do{ if(flowdepth==64) ParseError("Too much flow control nesting\n"); flowop[flowdepth]=x; flowptr[flowdepth++]=ptr; }while(0)
#define FlowPop(x) do{ if(!flowdepth || flowop[--flowdepth]!=(x)) ParseError("Flow control mismatch\n"); }while(0)
static int parse_instructions(int cla,int ptr,Hash*hash,int compat) {
  int peep=ptr;
  int prflag=0;
  Class*cl=classes[cla];
  int flowdepth=0;
  Uint16 flowop[64];
  Uint16 flowptr[64];
  int x,y;

        case OP_REPEAT:
          FlowPop(OP_WHILE);
          x=flowptr[flowdepth];
          FlowPop(OP_BEGIN);
          AddInst2(OP_GOTO,flowptr[flowdepth]);
          cl->codes[x]=ptr;
          break;
        case OP_FOR:
          if(cl->uservars>=0x07FF || num_globals>=0x07FF) ParseError("Too many user variables\n");
          if(cla) x=cl->uservars++|0x2000; else x=num_globals++|0x2800;
          AddInst2(OP_FOR,x);
          FlowPush(OP_FOR);
          peep=++ptr;
          break;
        case OP_NEXT:
          FlowPop(OP_FOR);
          AddInst(OP_NEXT);
          cl->codes[flowptr[flowdepth]]=ptr;
          break;
        default:
          if(Tokenf(TF_ABNORMAL)) ParseError("Invalid instruction token\n");
          if(compat && Tokenf(TF_COMPAT)) ++tokenv;
          AddInstF(tokenv,tokent);
      }
    } else if(Tokenf(TF_FUNCTION)) {
      AddInst2(OP_FUNCTION,tokenv&0x3FFF);
    } else if(tokent==TF_OPEN) {
      nxttok();
      if(Tokenf(TF_MACRO) || !Tokenf(TF_NAME)) ParseError("Invalid parenthesized instruction\n");
      switch(tokenv) {















        case OP_POPUP:
          nxttok();
          if(tokent!=TF_INT || tokenv<0 || tokenv>32) ParseError("Expected number from 0 to 32");
          if(tokenv) AddInst2(OP_POPUPARGS,tokenv); else AddInst(OP_POPUP);
          nxttok();
          if(tokent!=TF_CLOSE) ParseError("Unterminated (PopUp)\n");
          break;

    }
    if(ptr>=0xFFEF) ParseError("Out of code space\n");
  }
  if(flowdepth) ParseError("Unterminated flow control blocks (%d levels)\n",flowdepth);
  cl->codes=realloc(cl->codes,ptr*sizeof(Uint16))?:cl->codes;
  return ptr;
}

static void dump_class(int cla,int endptr,const Hash*hash) {
  const Class*cl=classes[cla];
  int i,j;
  if(!cl) return;
  printf("<<<Class %d>>>\n",cla);
  printf("  Name: %c%s\n",cla?'$':'(',cla?cl->name:"Global)");
  printf("  Flags: 0x%02X 0x%04X\n",cl->cflags,cl->oflags);
  printf("  Ht=%d Wt=%d Clm=%d Den=%d Vol=%d Str=%d Arr=%d Dep=%d\n",cl->height,cl->weight,cl->climb,cl->density,cl->volume,cl->strength,cl->arrivals,cl->departures);
  printf("  Temp=%d M4=%d M5=%d M6=%d M7=%d Shape=%d Shov=%d Coll=%d Img=%d\n",cl->temperature,cl->misc4,cl->misc5,cl->misc6,cl->misc7,cl->shape,cl->shovable,cl->collisionLayers,cl->nimages);
  printf("  Hard: %d %d %d %d\n",cl->hard[0],cl->hard[1],cl->hard[2],cl->hard[3]);
  printf("  Sharp: %d %d %d %d\n",cl->sharp[0],cl->sharp[1],cl->sharp[2],cl->sharp[3]);
  if(cl->nimages && cl->images) {
    printf("  Images:");
    for(i=0;i<cl->nimages;i++) printf(" %d%c",cl->images[i]&0x7FFF,cl->images[i]&0x8000?'*':'.');
    putchar('\n');
  }
  if(cl->nmsg && cl->messages) {
    printf("  Messages:\n");
    for(i=0;i<cl->nmsg;i++) {
      if(cl->messages[i]!=0xFFFF) {
        if(i<256) printf("    %s: 0x%04X\n",standard_message_names[i],cl->messages[i]);
        else printf("    #%s: 0x%04X\n",messages[i-256],cl->messages[i]);
      }
    }
  }
  if(hash && cl->uservars) {
    printf("  Variables:\n");
    for(i=0;i<LOCAL_HASH_SIZE;i++) {
      if(hash[i].id>=0x2000 && hash[i].id<0x3000) printf("    %%%s = 0x%04X\n",hash[i].txt,hash[i].id);
    }
  }
  if(endptr && cl->codes) {
    printf("  Codes:\n");
    for(i=0;i<endptr;i++) {
      if(!(i&16)) printf("    [%04X]",i);
      printf(" %04X",cl->codes[i]);
    }
    putchar('\n');
  }
  printf("---\n\n");
}

static void class_definition(int cla) {
  Hash*hash=calloc(LOCAL_HASH_SIZE,sizeof(Hash));
  Class*cl=classes[cla];
  int ptr=0;
  int compat=0;
  int i;
  if(!hash) fatal("Allocation failed\n");
  if(!cl) fatal("Confusion of class definition somehow\n");
  if(cl->cflags&(CF_NOCLASS1|CF_NOCLASS2)) {
    cl->cflags=0;
  } else {
    ParseError("Duplicate definition of class $%s\n",cl->name);
  }
  begin_label_stack();
  for(;;) {
    nxttok();
    if(Tokenf(TF_EOF)) {
      ParseError("Unexpected end of file\n");
    } else if(Tokenf(TF_MACRO)) {
      ParseError("Unexpected macro token\n");
    } else if(Tokenf(TF_CLOSE)) {
      break;
    } else if(Tokenf(TF_OPEN)) {
      nxttok();
      
    } else if(Tokenf(TF_NAME)) {
      switch(tokenv) {
        case OP_PLAYER: cl->cflags|=CF_PLAYER; break;
        case OP_INPUT: cl->cflags|=CF_INPUT; break;
        case OP_COMPATIBLE: cl->cflags|=CF_COMPATIBLE; compat=1; break;
        case OP_COMPATIBLE_C: cl->cflags|=CF_COMPATIBLE; break;
        case OP_QUIZ: cl->cflags|=CF_QUIZ; break;
        case OP_INVISIBLE: cl->oflags|=OF_INVISIBLE; break;
        case OP_VISUALONLY: cl->oflags|=OF_VISUALONLY; break;
        case OP_STEALTHY: cl->oflags|=OF_STEALTHY; break;
        case OP_USERSTATE: cl->oflags|=OF_USERSTATE; break;
        case OP_SHOVABLE: cl->shovable=0x55; break;
        default: ParseError("Invalid directly inside of a class definition\n");
      }
    } else {
      ParseError("Invalid directly inside of a class definition\n");
    }
  }
  end_label_stack(classes[0]->codes,hash);
  if(main_options['C']) dump_class(cla,ptr,hash);
  if(main_options['H']) {
    for(i=0;i<LOCAL_HASH_SIZE;i++) if(hash[i].id) printf(" \"%s\": %04X\n",hash[i].txt,hash[i].id);
  }
  for(i=0;i<LOCAL_HASH_SIZE;i++) free(hash[i].txt);
  free(hash);
}

void load_classes(void) {
  int i;
  int gloptr=0;
  Hash*glolocalhash;
  char*nam=sqlite3_mprintf("%s.class",basefilename);

    nxttok();
    if(tokent==TF_EOF) goto done;
    if(tokent!=TF_OPEN) ParseError("Expected open parenthesis\n");
    nxttok();
    if(Tokenf(TF_FUNCTION)) {
      functions[tokenv&0x3FFF]=gloptr;
      begin_label_stack();
      gloptr=parse_instructions(0,gloptr,glolocalhash,0);
      end_label_stack(classes[0]->codes,glolocalhash);
    } else if(Tokenf(TF_NAME)) {
      switch(tokenv) {
        case 0x4000 ... 0x7FFF: // Class definition
          class_definition(tokenv-0x4000);
          break;
        case 0x0200 ... 0x02FF: case 0xC000 ... 0xFFFF: // Default message handler
          begin_label_stack();
          set_message_ptr(0,tokenv&0x8000?(tokenv&0x3FFF)+256:tokenv-0x0200,gloptr);
          gloptr=parse_instructions(0,gloptr,glolocalhash,0);
          end_label_stack(classes[0]->codes,glolocalhash);
          break;
        case 0x2800 ... 0x2FFF: // Define initial values of global variables
          i=tokenv-0x2800;
          nxttok();
          if(tokent==TF_CLOSE) break;
          initglobals[i]=parse_constant_value();

      }
    } else {
      ParseError("Invalid top level definition\n");
    }
  }
  done:
  fclose(classfp);
  if(main_options['C']) dump_class(0,gloptr,glolocalhash);
  if(main_options['H']) {
    for(i=0;i<HASH_SIZE;i++) if(glohash[i].id) printf("\"%s\": %04X\n",glohash[i].txt,glohash[i].id);
    for(i=0;i<LOCAL_HASH_SIZE;i++) if(glolocalhash[i].id) printf(" \"%s\": %04X\n",glolocalhash[i].txt,glolocalhash[i].id);
  }
  for(i=0;i<LOCAL_HASH_SIZE;i++) free(glolocalhash[i].txt);
  free(glolocalhash);
  for(i=0;i<num_functions;i++) if(functions[i]==0xFFFF) {
    int j;
    for(j=0;j<HASH_SIZE;j++) if(glohash[j].id==i+0x8000) fatal("Function &%s mentioned but not defined\n",glohash[j].txt);
    fatal("Function mentioned but not defined\n");