#define WRBIT 0100000 #define TXTBIT 040000 #define EOFBIT 020000 #define ELNBIT 010000 #define WINDOW 04000 #define MAGIC 0252 struct file { char *ptr; unsigned flags; char *fname; int ufd; int size; int count; int buflen; char bufadr[512]; }; #define EXTFL(z) ((struct file *)(_hbase + _extfl[z]))