Free Hero Mesh

    labelstack=s->next;
    free(s);
  }
  free(labelptr);
  labelstack=0;
  labelptr=0;
}

static int parse_pattern(int cla,int ptr,Hash*hash) {
  Class*cl=classes[cla];
  Uint8 depth=0;
  Uint16 nest[32];
  int x,y;
  for(;;) {
    nxttok();
    if(Tokenf(TF_MACRO)) ParseError("Unexpected macro\n");
    if(Tokenf(TF_DIR)) {
      cl->codes[ptr++]=tokenv&15;
    } else if(Tokenf(TF_NAME)) {
      switch(tokenv) {
        case OP_ADD: case OP_CLIMB: case OP_EIGHT: case OP_FOUR:
        case OP_HEIGHT: case OP_LOC: case OP_MARK: case OP_SUB:
        case OP_DIR: case OP_DIR_C: case OP_DIR_E: case OP_DIR_EC:
        case 0x0200 ... 0x02FF: // message
        case 0x4000 ... 0x7FFF: // class
        case 0xC000 ... 0xFFFF: // message
          cl->codes[ptr++]=tokenv;
          break;
        case OP_BEGIN: case OP_IF:
          if(depth==31) ParseError("Too much pattern nesting\n");
          nest[depth++]=ptr;
          cl->codes[ptr++]=tokenv;
          cl->codes[ptr++]=0;
          break;
        case OP_ELSE:
          if(!depth) ParseError("Premature end of subpattern\n");
          cl->codes[nest[depth-1]+1]=ptr;
          cl->codes[ptr++]=cl->codes[nest[depth-1]];
          cl->codes[nest[depth-1]]=OP_ELSE;
          cl->codes[ptr++]=0;
          break;
        case OP_THEN:
          if(!depth) ParseError("Premature end of subpattern\n");
          cl->codes[nest[--depth]+1]=ptr;
          break;
        case OP_AGAIN:
          if(!depth) ParseError("Premature end of subpattern\n");
          cl->codes[ptr++]=OP_GOTO;
          cl->codes[ptr++]=nest[depth-1];
          cl->codes[nest[--depth]+1]=ptr;
          break;
        case OP_USERFLAG:
          x=look_hash(glohash,HASH_SIZE,0x1000,0x10FF,0,"user flags");
          if(!x) ParseError("User flag ^%s not defined\n",tokenstr);
          if(Tokenf(TF_COMMA)) x+=0x100;
          if(Tokenf(TF_EQUAL)) ParseError("Improper token in pattern\n");
          cl->codes[ptr++]=x;
          break;
        default: ParseError("Improper token in pattern\n");
      }
    } else if(tokent==TF_OPEN) {
      nxttok();
      if(Tokenf(TF_MACRO) || !Tokenf(TF_NAME)) ParseError("Improper token in pattern\n");
      switch(tokenv) {
        case OP_HEIGHT: case OP_CLIMB:
          cl->codes[ptr++]=tokenv+0x0800; // OP_HEIGHT_C or OP_CLIMB_C
          nxttok();
          if(tokent!=TF_INT) ParseError("Number expected\n");
          if(tokenv&~0xFFFF) ParseError("Number out of range\n");
          cl->codes[ptr++]=tokenv;
          nxttok();
          if(tokent!=TF_CLOSE) ParseError("Close parentheses expected\n");
          break;
        default: ParseError("Improper token in pattern\n");
      }
    } else if(tokent==TF_CLOSE) {
      if(depth) ParseError("Premature end of pattern\n");
      cl->codes[ptr++]=OP_RET;
      return ptr;
    } else if(Tokenf(TF_EOF)) {
      ParseError("Unexpected end of file\n");
    } else {
      ParseError("Improper token in pattern\n");
    }
    if(ptr>=0xFFEF) ParseError("Out of code space\n");
  }
}

#define AddInst(x) (cl->codes[ptr++]=(x),prflag=0)
#define AddInst2(x,y) (cl->codes[ptr++]=(x),cl->codes[ptr++]=(y),prflag=0,peep=ptr)
#define AddInstF(x,y) (cl->codes[ptr++]=(x),prflag=(y))
#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)

      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;
        case OP_PATTERN: case OP_PATTERNS:
        case OP_PATTERN_C: case OP_PATTERNS_C:
        case OP_PATTERN_E: case OP_PATTERNS_E:
          AddInst(tokenv);
          cl->codes[ptr]=peep=parse_pattern(cla,ptr+1,hash);
          ptr=peep;
          break;
        case OP_BROADCAST:
          nxttok();
          if(Tokenf(TF_MACRO) || !Tokenf(TF_NAME) || tokenv<0x4000 || tokenv>0x7FFF) ParseError("Class name expected\n");
          AddInst2(OP_BROADCASTCLASS,tokenv-0x4000);
          nxttok();
          if(tokent!=TF_CLOSE) ParseError("Unterminated (Broadcast)\n");

  Available for your own use.

The return value of HITBY can also be an object instead of a number. In
this case, a warp occurs. The movement is restarted, using the specified
object as the origin of the movement, and that object's direction as the
direction of movement.


=== Pattern matching ===

(TODO)


=== Compatibility ===

Compatible objects have the following differences from the default:

* VisualOnly implies Stealthy.

; Arrays
-Array
GetArray
InitArray
SetArray
ArrayCell

; Pattern matching
-,=Pattern "P"
-,=PatternS "P*"
-Four
-Eight

; Specials
*Function
*Local
*Label
*String
*Int16

#define OP_MBEGIN 32967
#define OP_FLIP 32968
#define OP_ARRAY 32969
#define OP_GETARRAY 32970
#define OP_INITARRAY 32971
#define OP_SETARRAY 32972
#define OP_ARRAYCELL 32973
#define OP_PATTERN 32974
#define OP_PATTERN_C 35022
#define OP_PATTERN_E 37070
#define OP_PATTERN_EC 39118
#define OP_PATTERNS 32975
#define OP_PATTERNS_C 35023
#define OP_PATTERNS_E 37071
#define OP_PATTERNS_EC 39119
#define OP_FOUR 32976
#define OP_EIGHT 32977
#define OP_FUNCTION 32978
#define OP_LOCAL 32979
#define OP_LABEL 32980
#define OP_STRING 32981
#define OP_INT16 32982
#define OP_INT32 32983
#define OP_DISPATCH 32984
#define OP_USERFLAG 32985
#ifdef HEROMESH_CLASS
static const Op_Names op_names[]={
{"*",8486937},
{"+",8421399},
{"+Move",10584230},
{"-",8421400},
{"-Move",10584231},

{"Destroyed",8487026},
{"Dir",8618048},
{"Distance",9142340},
{"Done",8618097},
{"E",9437184},
{"END_TURN",8389139},
{"EditorHelp",8683654},
{"Eight",8683729},
{"F",9437192},
{"FAROUT",8389421},
{"FFFFTT",8389399},
{"FLOATED",8389132},
{"FROG",8389383},
{"Finished",8552575},
{"FlushClass",8421527},
{"FlushObj",8487064},
{"Four",8683728},
{"From",8421496},
{"GLASS",8389379},
{"GLISSANT",8389419},
{"GetArray",8421578},
{"GetInventory",8421529},
{"HAWK",8389425},
{"HEARTBEAT",8389407},

{"ObjBelow",8487084},
{"ObjBottomAt",8421549},
{"ObjClassAt",8421550},
{"ObjDir",8487087},
{"ObjLayerAt",8421552},
{"ObjMovingTo",8421553},
{"ObjTopAt",8421554},
{"P",8880334},
{"P*",8880335},
{"PLAYERMOVING",8389133},
{"POSTINIT",8389138},
{"POUR",8389377},
{"POWER",8389386},
{"Player",8487027},
{"PopUp",8421555},
{"Quiz",8683650},

{"swap",8421378},
{"then",8683531},
{"tmark",8421572},
{"tuck",8421380},
{"until",8683535},
{"while",8683536},
};
#define N_OP_NAMES 318
#endif