Structure for symbol table entries

The C language structure declaration for the symbol table entry is shown below. This declaration may be found in the header file syms.h.

   struct syment
   {
      union
      {
          char          _n_name[SYMNMLEN];  /* symbol name*/
          struct
          {
                long    _n_zeroes;          /* symbol name */
   

                long    _n_offset;          /* location in string table */
          } _n_n;
          char          *_n_nptr[2];        /* allows overlaying */
      } _n;
      unsigned long     n_value;            /* value of symbol */
   

      short             n_scnum;            /* section number */
   

      unsigned short    n_type;             /* type and derived */
   

      char              n_sclass;           /* storage class */
   

      char              n_numaux;           /* number of aux entries */
   };
   

   #define  n_name          _n._n_name
   #define  n_zeroes        _n._n_n._n_zeroes
   #define  n_offset        _n._n_n._n_offset
   #define  n_nptr          _n._n_nptr[1]
   

   #define  SYMNMLEN  8
   #define  SYMESZ    18                    /* size of a symbol table entry */