1 /* $NetBSD: ndbmdatum.c,v 1.4 2008/09/11 12:58:00 joerg Exp $ */ 2 /* from: NetBSD: ndbm.c,v 1.18 2004/04/27 20:03:45 kleink Exp */ 3 4 /*- 5 * Copyright (c) 1990, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Margo Seltzer. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #if HAVE_NBTOOL_CONFIG_H 37 #include "nbtool_config.h" 38 #endif 39 40 #include <sys/cdefs.h> 41 __RCSID("$NetBSD: ndbmdatum.c,v 1.4 2008/09/11 12:58:00 joerg Exp $"); 42 43 /* 44 * This package provides a dbm compatible interface to the new hashing 45 * package described in db(3). 46 */ 47 #include "namespace.h" 48 #include <sys/param.h> 49 50 #include <fcntl.h> 51 #include <stdio.h> 52 #include <string.h> 53 54 #include <ndbm.h> 55 #include "hash.h" 56 57 /* 58 * Returns: 59 * DATUM on success 60 * NULL on failure 61 */ 62 datum 63 dbm_fetch(DBM *db, datum key) 64 { 65 datum retdata; 66 int status; 67 DBT dbtkey, dbtretdata; 68 69 dbtkey.data = key.dptr; 70 dbtkey.size = key.dsize; 71 status = (db->get)(db, &dbtkey, &dbtretdata, 0); 72 if (status) { 73 dbtretdata.data = NULL; 74 dbtretdata.size = 0; 75 } 76 retdata.dptr = dbtretdata.data; 77 retdata.dsize = dbtretdata.size; 78 return (retdata); 79 } 80 81 /* 82 * Returns: 83 * DATUM on success 84 * NULL on failure 85 */ 86 datum 87 dbm_firstkey(DBM *db) 88 { 89 int status; 90 datum retkey; 91 DBT dbtretkey, dbtretdata; 92 93 status = (db->seq)(db, &dbtretkey, &dbtretdata, R_FIRST); 94 if (status) 95 dbtretkey.data = NULL; 96 retkey.dptr = dbtretkey.data; 97 retkey.dsize = dbtretkey.size; 98 return (retkey); 99 } 100 101 /* 102 * Returns: 103 * DATUM on success 104 * NULL on failure 105 */ 106 datum 107 dbm_nextkey(DBM *db) 108 { 109 int status; 110 datum retkey; 111 DBT dbtretkey, dbtretdata; 112 113 status = (db->seq)(db, &dbtretkey, &dbtretdata, R_NEXT); 114 if (status) 115 dbtretkey.data = NULL; 116 retkey.dptr = dbtretkey.data; 117 retkey.dsize = dbtretkey.size; 118 return (retkey); 119 } 120 121 /* 122 * Returns: 123 * 0 on success 124 * <0 failure 125 */ 126 int 127 dbm_delete(DBM *db, datum key) 128 { 129 int status; 130 DBT dbtkey; 131 132 dbtkey.data = key.dptr; 133 dbtkey.size = key.dsize; 134 status = (db->del)(db, &dbtkey, 0); 135 if (status) 136 return (-1); 137 else 138 return (0); 139 } 140 141 /* 142 * Returns: 143 * 0 on success 144 * <0 failure 145 * 1 if DBM_INSERT and entry exists 146 */ 147 int 148 dbm_store(DBM *db, datum key, datum data, int flags) 149 { 150 DBT dbtkey, dbtdata; 151 152 dbtkey.data = key.dptr; 153 dbtkey.size = key.dsize; 154 dbtdata.data = data.dptr; 155 dbtdata.size = data.dsize; 156 return ((db->put)(db, &dbtkey, &dbtdata, 157 (u_int)((flags == DBM_INSERT) ? R_NOOVERWRITE : 0))); 158 } 159