#define PBLKSIZ 1024 #define DBLKSIZ 4096 #define BYTESIZ 8 #define NULL ((char *) 0) long bitno; long maxbno; long blkno; long hmask; char pagbuf[PBLKSIZ]; char dirbuf[DBLKSIZ]; int dirf; int pagf; int dbrdonly; typedef struct { char *dptr; int dsize; } datum; datum fetch(); datum makdatum(); datum firstkey(); datum nextkey(); datum firsthash(); long calchash(); long hashinc();