| 1 | /* ndbm.h 4.2 83/12/20 */ |
| 2 | |
| 3 | /* |
| 4 | * (New) Hashed key data base library (-lndbm). |
| 5 | */ |
| 6 | #define PBLKSIZ 1024 |
| 7 | #define DBLKSIZ 4096 |
| 8 | |
| 9 | typedef struct { |
| 10 | int db_dirf; /* open directory file */ |
| 11 | int db_pagf; /* open page file */ |
| 12 | int db_flags; |
| 13 | #define _DB_RDONLY 0x1 /* data base open read-only */ |
| 14 | long db_maxbno; /* last ``block'' in page file */ |
| 15 | long db_bitno; |
| 16 | long db_hmask; |
| 17 | long db_blkno; /* current page to read/write */ |
| 18 | long db_pagbno; /* current page in pagbuf */ |
| 19 | char db_pagbuf[PBLKSIZ]; /* page file block buffer */ |
| 20 | long db_dirbno; /* current block in dirbuf */ |
| 21 | char db_dirbuf[DBLKSIZ]; /* directory file block buffer */ |
| 22 | } DBM; |
| 23 | |
| 24 | #define dbrdonly(db) ((db)->db_flags&_DB_RDONLY) != 0 |
| 25 | |
| 26 | typedef struct { |
| 27 | char *dptr; |
| 28 | int dsize; |
| 29 | } datum; |
| 30 | |
| 31 | /* flags to dbmstore() */ |
| 32 | #define DB_INSERT 0 |
| 33 | #define DB_REPLACE 1 |
| 34 | |
| 35 | datum dbmfetch(); |
| 36 | datum dbmfirstkey(); |
| 37 | datum dbmnextkey(); |
| 38 | long dbmforder(); |
| 39 | int dbmdelete(); |
| 40 | int dbmstore(); |
| 41 | |
| 42 | DBM *ndbmopen(); |
| 43 | void ndbmclose(); |