/* alloc.h
   C transliteration of parts of the bcpl alloc package
   written by E. McCreight and friends.
   Swinehart May 18, 1982  7:55 AM
   Stewart May 25, 1982  10:50 AM
   Stewart December 28, 1982  11:41 AM, added SB.user
 */

struct SB {
  int length;
  int user;
  struct SB *pSbNext;
  struct SB *pSbPrevious;
  };

struct ZN {
  struct SB anchor;
  struct SB *rover;
  int *minAdr;
  int *maxAdr;
  };