projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| bb0cfa24 DF |
1 | /* |
| 2 | * Copyright (c) 1983 Regents of the University of California. | |
| 3 | * All rights reserved. The Berkeley software License Agreement | |
| 4 | * specifies the terms and conditions for redistribution. | |
| 5 | * | |
| f7532098 | 6 | * @(#)ndbm.h 5.2 (Berkeley) %G% |
| bb0cfa24 | 7 | */ |
| d1e097f8 RC |
8 | |
| 9 | /* | |
| 2a683113 | 10 | * Hashed key data base library. |
| d1e097f8 RC |
11 | */ |
| 12 | #define PBLKSIZ 1024 | |
| 13 | #define DBLKSIZ 4096 | |
| 14 | ||
| 15 | typedef struct { | |
| 2e13754e RC |
16 | int dbm_dirf; /* open directory file */ |
| 17 | int dbm_pagf; /* open page file */ | |
| 18 | int dbm_flags; /* flags, see below */ | |
| 19 | long dbm_maxbno; /* last ``bit'' in dir file */ | |
| 20 | long dbm_bitno; /* current bit number */ | |
| 21 | long dbm_hmask; /* hash mask */ | |
| 22 | long dbm_blkptr; /* current block for dbm_nextkey */ | |
| 23 | int dbm_keyptr; /* current key for dbm_nextkey */ | |
| 24 | long dbm_blkno; /* current page to read/write */ | |
| 25 | long dbm_pagbno; /* current page in pagbuf */ | |
| 26 | char dbm_pagbuf[PBLKSIZ]; /* page file block buffer */ | |
| 27 | long dbm_dirbno; /* current block in dirbuf */ | |
| 28 | char dbm_dirbuf[DBLKSIZ]; /* directory file block buffer */ | |
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29 | } DBM; |
| 30 | ||
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31 | #define _DBM_RDONLY 0x1 /* data base open read-only */ |
| 32 | #define _DBM_IOERR 0x2 /* data base I/O error */ | |
| 33 | ||
| 34 | #define dbm_rdonly(db) ((db)->dbm_flags & _DBM_RDONLY) | |
| 35 | ||
| 36 | #define dbm_error(db) ((db)->dbm_flags & _DBM_IOERR) | |
| 37 | /* use this one at your own risk! */ | |
| 38 | #define dbm_clearerr(db) ((db)->dbm_flags &= ~_DBM_IOERR) | |
| d1e097f8 | 39 | |
| 3b3806ff S |
40 | /* for flock(2) and fstat(2) */ |
| 41 | #define dbm_dirfno(db) ((db)->dbm_dirf) | |
| 42 | #define dbm_pagfno(db) ((db)->dbm_pagf) | |
| 43 | ||
| d1e097f8 | 44 | typedef struct { |
| 2e13754e RC |
45 | char *dptr; |
| 46 | int dsize; | |
| d1e097f8 RC |
47 | } datum; |
| 48 | ||
| 2a683113 RC |
49 | /* |
| 50 | * flags to dbm_store() | |
| 51 | */ | |
| 52 | #define DBM_INSERT 0 | |
| 53 | #define DBM_REPLACE 1 | |
| d1e097f8 | 54 | |
| f7532098 KB |
55 | #ifdef __STDC__ |
| 56 | extern DBM *dbm_open(const char *, int, int); | |
| 57 | extern void dbm_close(DBM *); | |
| 58 | extern datum dbm_fetch(DBM *, datum); | |
| 59 | extern datum dbm_firstkey(DBM *); | |
| 60 | extern datum dbm_nextkey(DBM *); | |
| 61 | extern long dbm_forder(DBM *, datum); | |
| 62 | extern int dbm_delete(DBM *, datum); | |
| 63 | extern int dbm_store(DBM *, datum, datum, int); | |
| 64 | #else | |
| 65 | extern DBM *dbm_open(); | |
| 66 | extern void dbm_close(); | |
| 67 | extern datum dbm_fetch(); | |
| 68 | extern datum dbm_firstkey(); | |
| 69 | extern datum dbm_nextkey(); | |
| 70 | extern long dbm_forder(); | |
| 71 | extern int dbm_delete(); | |
| 72 | extern int dbm_store(); | |
| 73 | #endif |