eref.h

#if !defined(EREF_H)
#define EREF_H
 
#include "employee.h"
 
typedef int eref;
 
/* Private typedefs used in macros  */
typedef enum {used, avail} eref_status;
typedef struct {employee *conts;
                eref_status *status;
                int size;} eref_ERP;
 
/* Declared here so that macros can use it  */
extern eref_ERP eref_Pool;
 
#include "eref.lh"
 
#define erefNIL -1
#define eref_free(er)  (eref_Pool.status[er] = avail)
#define eref_assign(er, e) (eref_Pool.conts[er] = e)
#define eref_get(er) (eref_Pool.conts[er])
#define eref_equal(er1, er2) (er1 == er2) 
#endif