1 /* $NetBSD: ndbm_wrap.c,v 1.1.1.1 2011/04/13 18:15:42 elric Exp $ */ 2 3 /* 4 * Copyright (c) 2002 Kungliga Tekniska Högskolan 5 * (Royal Institute of Technology, Stockholm, Sweden). 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * 3. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE 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 #include <config.h> 37 38 #include "ndbm_wrap.h" 39 #if defined(HAVE_DBHEADER) 40 #include <db.h> 41 #elif defined(HAVE_DB5_DB_H) 42 #include <db5/db.h> 43 #elif defined(HAVE_DB4_DB_H) 44 #include <db4/db.h> 45 #elif defined(HAVE_DB3_DB_H) 46 #include <db3/db.h> 47 #else 48 #include <db.h> 49 #endif 50 51 #include <stdio.h> 52 #include <stdlib.h> 53 #include <string.h> 54 #include <fcntl.h> 55 56 /* XXX undefine open so this works on Solaris with large file support */ 57 #undef open 58 59 #define DBT2DATUM(DBT, DATUM) do { (DATUM)->dptr = (DBT)->data; (DATUM)->dsize = (DBT)->size; } while(0) 60 #define DATUM2DBT(DATUM, DBT) do { (DBT)->data = (DATUM)->dptr; (DBT)->size = (DATUM)->dsize; } while(0) 61 #define RETURN(X) return ((X) == 0) ? 0 : -1 62 63 #ifdef HAVE_DB3 64 static DBC *cursor; 65 #endif 66 67 #define D(X) ((DB*)(X)) 68 69 ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL 70 dbm_close (DBM *db) 71 { 72 #ifdef HAVE_DB3 73 D(db)->close(D(db), 0); 74 cursor = NULL; 75 #else 76 D(db)->close(D(db)); 77 #endif 78 } 79 80 ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL 81 dbm_delete (DBM *db, datum dkey) 82 { 83 DBT key; 84 DATUM2DBT(&dkey, &key); 85 #ifdef HAVE_DB3 86 RETURN(D(db)->del(D(db), NULL, &key, 0)); 87 #else 88 RETURN(D(db)->del(D(db), &key, 0)); 89 #endif 90 } 91 92 datum 93 dbm_fetch (DBM *db, datum dkey) 94 { 95 datum dvalue; 96 DBT key, value; 97 DATUM2DBT(&dkey, &key); 98 if(D(db)->get(D(db), 99 #ifdef HAVE_DB3 100 NULL, 101 #endif 102 &key, &value, 0) != 0) { 103 dvalue.dptr = NULL; 104 dvalue.dsize = 0; 105 } 106 else 107 DBT2DATUM(&value, &dvalue); 108 109 return dvalue; 110 } 111 112 static datum 113 dbm_get (DB *db, int flags) 114 { 115 DBT key, value; 116 datum datum; 117 #ifdef HAVE_DB3 118 if(cursor == NULL) 119 db->cursor(db, NULL, &cursor, 0); 120 if(cursor->c_get(cursor, &key, &value, flags) != 0) { 121 datum.dptr = NULL; 122 datum.dsize = 0; 123 } else 124 DBT2DATUM(&value, &datum); 125 #else 126 db->seq(db, &key, &value, flags); 127 #endif 128 return datum; 129 } 130 131 #ifndef DB_FIRST 132 #define DB_FIRST R_FIRST 133 #define DB_NEXT R_NEXT 134 #define DB_NOOVERWRITE R_NOOVERWRITE 135 #define DB_KEYEXIST 1 136 #endif 137 138 ROKEN_LIB_FUNCTION datum ROKEN_LIB_CALL 139 dbm_firstkey (DBM *db) 140 { 141 return dbm_get(D(db), DB_FIRST); 142 } 143 144 ROKEN_LIB_FUNCTION datum ROKEN_LIB_CALL 145 dbm_nextkey (DBM *db) 146 { 147 return dbm_get(D(db), DB_NEXT); 148 } 149 150 ROKEN_LIB_FUNCTION DBM* ROKEN_LIB_CALL 151 dbm_open (const char *file, int flags, mode_t mode) 152 { 153 DB *db; 154 int myflags = 0; 155 char *fn = malloc(strlen(file) + 4); 156 if(fn == NULL) 157 return NULL; 158 strcpy(fn, file); 159 strcat(fn, ".db"); 160 #ifdef HAVE_DB3 161 if (flags & O_CREAT) 162 myflags |= DB_CREATE; 163 164 if (flags & O_EXCL) 165 myflags |= DB_EXCL; 166 167 if (flags & O_RDONLY) 168 myflags |= DB_RDONLY; 169 170 if (flags & O_TRUNC) 171 myflags |= DB_TRUNCATE; 172 if(db_create(&db, NULL, 0) != 0) { 173 free(fn); 174 return NULL; 175 } 176 177 #if (DB_VERSION_MAJOR > 3) && (DB_VERSION_MINOR > 0) 178 if(db->open(db, NULL, fn, NULL, DB_BTREE, myflags, mode) != 0) { 179 #else 180 if(db->open(db, fn, NULL, DB_BTREE, myflags, mode) != 0) { 181 #endif 182 free(fn); 183 db->close(db, 0); 184 return NULL; 185 } 186 #else 187 db = dbopen(fn, flags, mode, DB_BTREE, NULL); 188 #endif 189 free(fn); 190 return (DBM*)db; 191 } 192 193 ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL 194 dbm_store (DBM *db, datum dkey, datum dvalue, int flags) 195 { 196 int ret; 197 DBT key, value; 198 int myflags = 0; 199 if((flags & DBM_REPLACE) == 0) 200 myflags |= DB_NOOVERWRITE; 201 DATUM2DBT(&dkey, &key); 202 DATUM2DBT(&dvalue, &value); 203 ret = D(db)->put(D(db), 204 #ifdef HAVE_DB3 205 NULL, 206 #endif 207 &key, &value, myflags); 208 if(ret == DB_KEYEXIST) 209 return 1; 210 RETURN(ret); 211 } 212 213 ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL 214 dbm_error (DBM *db) 215 { 216 return 0; 217 } 218 219 ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL 220 dbm_clearerr (DBM *db) 221 { 222 return 0; 223 } 224 225