#define HUFFBITS unsigned long int
#define HTN     34
#define MXOFF   250
 
struct huffcodetab {
  unsigned int xlen;    /*max. x-index+                         */ 
  unsigned int ylen;    /*max. y-index+                         */
  unsigned int linbits; /*number of linbits                     */
  unsigned int linmax;  /*max number to be stored in linbits    */
  HUFFBITS *table;      /*pointer to array[xlen][ylen]          */
  unsigned char *hlen;  /*pointer to array[xlen][ylen]          */
};

extern struct huffcodetab ht[HTN];/* global memory block                */
                                /* array of all huffcodtable headers    */
                                /* 0..31 Huffman code table 0..31       */
                                /* 32,33 count1-tables                  */