Listing 1

/* xalloc.h internal header */
#include <stddef.h>
#include <stdlib.h>
#ifndef _YVALS
#include <yvals.h>
#endif
              /* macros */
#define CELL_OFF        (sizeof (size_t) + _MEMBND & ~_MEMBND)
#define SIZE_BLOCK      512     /* minimum block size */
#define SIZE_CELL       \
       ((sizeof (_Cell) + _MEMBND & ~_MEMBND) - CELL_OFF)
              /* type definitions */
typedef struct _Cell {
       size_t _Size;
       struct _Cell *_Next;
       } _Cell;
typedef struct {
       _Cell **_Plast;
       _Cell *_Head;
       } _Altab;
              /* declarations */
void *_Getmem(size_t);
extern_Altab_Aldata;

/* End of File */