projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| fea1cabb | 1 | /* |
| 59815af2 KB |
2 | * Copyright (c) 1985 The Regents of the University of California. |
| 3 | * All rights reserved. | |
| 4 | * | |
| f1855e9f | 5 | * %sccs.include.redist.c% |
| fea1cabb JB |
6 | */ |
| 7 | ||
| 06c51eed | 8 | #ifndef lint |
| f1855e9f | 9 | static char sccsid[] = "@(#)dbm.c 5.5 (Berkeley) %G%"; |
| 59815af2 | 10 | #endif /* not lint */ |
| 06c51eed RE |
11 | |
| 12 | #include "dbm.h" | |
| 13 | ||
| 14 | #define NODB ((DBM *)0) | |
| 15 | ||
| 16 | static DBM *cur_db = NODB; | |
| 17 | ||
| 18 | static char no_db[] = "dbm: no open database\n"; | |
| 19 | ||
| 20 | dbminit(file) | |
| 21 | char *file; | |
| 22 | { | |
| 23 | if (cur_db != NODB) | |
| 24 | dbm_close(cur_db); | |
| 25 | ||
| 26 | cur_db = dbm_open(file, 2, 0); | |
| 27 | if (cur_db == NODB) { | |
| 28 | cur_db = dbm_open(file, 0, 0); | |
| ac2e7cc8 RE |
29 | if (cur_db == NODB) |
| 30 | return (-1); | |
| 06c51eed RE |
31 | } |
| 32 | return (0); | |
| 33 | } | |
| 34 | ||
| 35 | long | |
| 36 | forder(key) | |
| 37 | datum key; | |
| 38 | { | |
| 39 | if (cur_db == NODB) { | |
| 40 | printf(no_db); | |
| 41 | return (0L); | |
| 42 | } | |
| 43 | return (dbm_forder(cur_db, key)); | |
| 44 | } | |
| 45 | ||
| 46 | datum | |
| 47 | fetch(key) | |
| 48 | datum key; | |
| 49 | { | |
| 50 | datum item; | |
| 51 | ||
| 52 | if (cur_db == NODB) { | |
| 53 | printf(no_db); | |
| 54 | item.dptr = 0; | |
| 55 | return (item); | |
| 56 | } | |
| 57 | return (dbm_fetch(cur_db, key)); | |
| 58 | } | |
| 59 | ||
| 60 | delete(key) | |
| 61 | datum key; | |
| 62 | { | |
| 63 | if (cur_db == NODB) { | |
| 64 | printf(no_db); | |
| 65 | return (-1); | |
| 66 | } | |
| 67 | if (dbm_rdonly(cur_db)) | |
| 68 | return (-1); | |
| 69 | return (dbm_delete(cur_db, key)); | |
| 70 | } | |
| 71 | ||
| 72 | store(key, dat) | |
| 73 | datum key, dat; | |
| 74 | { | |
| 75 | if (cur_db == NODB) { | |
| 76 | printf(no_db); | |
| 77 | return (-1); | |
| 78 | } | |
| 79 | if (dbm_rdonly(cur_db)) | |
| 80 | return (-1); | |
| 81 | ||
| 82 | return (dbm_store(cur_db, key, dat, DBM_REPLACE)); | |
| 83 | } | |
| 84 | ||
| 85 | datum | |
| 86 | firstkey() | |
| 87 | { | |
| 88 | datum item; | |
| 89 | ||
| 90 | if (cur_db == NODB) { | |
| 91 | printf(no_db); | |
| 92 | item.dptr = 0; | |
| 93 | return (item); | |
| 94 | } | |
| 95 | return (dbm_firstkey(cur_db)); | |
| 96 | } | |
| 97 | ||
| 98 | datum | |
| 99 | nextkey(key) | |
| 100 | datum key; | |
| 101 | { | |
| 102 | datum item; | |
| 103 | ||
| 104 | if (cur_db == NODB) { | |
| 105 | printf(no_db); | |
| 106 | item.dptr = 0; | |
| 107 | return (item); | |
| 108 | } | |
| 109 | return (dbm_nextkey(cur_db, key)); | |
| 110 | } |