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Dbm: module
{
PATH: con "/dis/lib/dbm.dis";
Datum: type array of byte;
Dbf: adt {
create: fn(file: string, perm: int): ref Dbf;
open: fn(file: string, flags: int): ref Dbf;
fetch: fn(db: self ref Dbf, key: Datum): Datum;
delete: fn(db: self ref Dbf, key: Datum): int;
store: fn(db: self ref Dbf, key: Datum, dat: Datum, replace: int): int;
firstkey: fn(db: self ref Dbf): Datum;
nextkey: fn(db: self ref Dbf, key: Datum): Datum;
flush: fn(db: self ref Dbf);
isrdonly: fn(db: self ref Dbf): int;
dirf: ref Sys->FD; # directory
pagf: ref Sys->FD; # page
flags: int;
maxbno: int; # last `bno' in page file
bitno: int;
hmask: int;
blkno: int; # current page to read/write
pagbno: int; # current page in pagbuf
pagbuf: array of byte; # [PBLKSIZ]
dirbno: int; # current block in dirbuf
dirbuf: array of byte; # [DBLKSIZ]
};
init: fn();
};
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