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|---|
| 463ee0b2 |
1 | /* |
| 2 | * Copyright (c) 1985 The Regents of the University of California. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms are permitted |
| 6 | * provided that the above copyright notice and this paragraph are |
| 7 | * duplicated in all such forms and that any documentation, |
| 8 | * advertising materials, and other materials related to such |
| 9 | * distribution and use acknowledge that the software was developed |
| 10 | * by the University of California, Berkeley. The name of the |
| 11 | * University may not be used to endorse or promote products derived |
| 12 | * from this software without specific prior written permission. |
| 13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
| 14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
| 15 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| 16 | */ |
| 17 | |
| 18 | #ifndef lint |
| 19 | static char sccsid[] = "@(#)dbm.c 5.4 (Berkeley) 5/24/89"; |
| 20 | #endif /* not lint */ |
| 21 | |
| 22 | #include "dbm.h" |
| 23 | |
| 24 | #define NODB ((DBM *)0) |
| 25 | |
| 26 | static DBM *cur_db = NODB; |
| 27 | |
| 28 | static char no_db[] = "dbm: no open database\n"; |
| 29 | |
| 30 | dbminit(file) |
| 31 | char *file; |
| 32 | { |
| 33 | if (cur_db != NODB) |
| 34 | dbm_close(cur_db); |
| 35 | |
| 36 | cur_db = dbm_open(file, 2, 0); |
| 37 | if (cur_db == NODB) { |
| 38 | cur_db = dbm_open(file, 0, 0); |
| 39 | if (cur_db == NODB) |
| 40 | return (-1); |
| 41 | } |
| 42 | return (0); |
| 43 | } |
| 44 | |
| 45 | long |
| 46 | forder(key) |
| 47 | datum key; |
| 48 | { |
| 49 | if (cur_db == NODB) { |
| 50 | printf(no_db); |
| 51 | return (0L); |
| 52 | } |
| 53 | return (dbm_forder(cur_db, key)); |
| 54 | } |
| 55 | |
| 56 | datum |
| 57 | fetch(key) |
| 58 | datum key; |
| 59 | { |
| 60 | datum item; |
| 61 | |
| 62 | if (cur_db == NODB) { |
| 63 | printf(no_db); |
| 64 | item.dptr = 0; |
| 65 | return (item); |
| 66 | } |
| 67 | return (dbm_fetch(cur_db, key)); |
| 68 | } |
| 69 | |
| 70 | delete(key) |
| 71 | datum key; |
| 72 | { |
| 73 | if (cur_db == NODB) { |
| 74 | printf(no_db); |
| 75 | return (-1); |
| 76 | } |
| 77 | if (dbm_rdonly(cur_db)) |
| 78 | return (-1); |
| 79 | return (dbm_delete(cur_db, key)); |
| 80 | } |
| 81 | |
| 82 | store(key, dat) |
| 83 | datum key, dat; |
| 84 | { |
| 85 | if (cur_db == NODB) { |
| 86 | printf(no_db); |
| 87 | return (-1); |
| 88 | } |
| 89 | if (dbm_rdonly(cur_db)) |
| 90 | return (-1); |
| 91 | |
| 92 | return (dbm_store(cur_db, key, dat, DBM_REPLACE)); |
| 93 | } |
| 94 | |
| 95 | datum |
| 96 | firstkey() |
| 97 | { |
| 98 | datum item; |
| 99 | |
| 100 | if (cur_db == NODB) { |
| 101 | printf(no_db); |
| 102 | item.dptr = 0; |
| 103 | return (item); |
| 104 | } |
| 105 | return (dbm_firstkey(cur_db)); |
| 106 | } |
| 107 | |
| 108 | datum |
| 109 | nextkey(key) |
| 110 | datum key; |
| 111 | { |
| 112 | datum item; |
| 113 | |
| 114 | if (cur_db == NODB) { |
| 115 | printf(no_db); |
| 116 | item.dptr = 0; |
| 117 | return (item); |
| 118 | } |
| 119 | return (dbm_nextkey(cur_db, key)); |
| 120 | } |
projects / p5sagit/p5-mst-13.2.git / blame