1/* 2 * Copyright (c) 2002 Kungliga Tekniska Högskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34#include <config.h> 35 36#include "ndbm_wrap.h" 37#if defined(HAVE_DBHEADER) 38#include <db.h> 39#elif defined(HAVE_DB5_DB_H) 40#include <db5/db.h> 41#elif defined(HAVE_DB4_DB_H) 42#include <db4/db.h> 43#elif defined(HAVE_DB3_DB_H) 44#include <db3/db.h> 45#else 46#include <db.h> 47#endif 48 49#include <stdio.h> 50#include <stdlib.h> 51#include <string.h> 52#include <fcntl.h> 53 54/* XXX undefine open so this works on Solaris with large file support */ 55#undef open 56 57#define DBT2DATUM(DBT, DATUM) do { (DATUM)->dptr = (DBT)->data; (DATUM)->dsize = (DBT)->size; } while(0) 58#define DATUM2DBT(DATUM, DBT) do { (DBT)->data = (DATUM)->dptr; (DBT)->size = (DATUM)->dsize; } while(0) 59#define RETURN(X) return ((X) == 0) ? 0 : -1 60 61#ifdef HAVE_DB3 62static DBC *cursor; 63#endif 64 65#define D(X) ((DB*)(X)) 66 67ROKEN_LIB_FUNCTION void ROKEN_LIB_CALL 68dbm_close (DBM *db) 69{ 70#ifdef HAVE_DB3 71 D(db)->close(D(db), 0); 72 cursor = NULL; 73#else 74 D(db)->close(D(db)); 75#endif 76} 77 78ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL 79dbm_delete (DBM *db, datum dkey) 80{ 81 DBT key; 82 DATUM2DBT(&dkey, &key); 83#ifdef HAVE_DB3 84 RETURN(D(db)->del(D(db), NULL, &key, 0)); 85#else 86 RETURN(D(db)->del(D(db), &key, 0)); 87#endif 88} 89 90datum 91dbm_fetch (DBM *db, datum dkey) 92{ 93 datum dvalue; 94 DBT key, value; 95 DATUM2DBT(&dkey, &key); 96 if(D(db)->get(D(db), 97#ifdef HAVE_DB3 98 NULL, 99#endif 100 &key, &value, 0) != 0) { 101 dvalue.dptr = NULL; 102 dvalue.dsize = 0; 103 } 104 else 105 DBT2DATUM(&value, &dvalue); 106 107 return dvalue; 108} 109 110static datum 111dbm_get (DB *db, int flags) 112{ 113 DBT key, value; 114 datum datum; 115#ifdef HAVE_DB3 116 if(cursor == NULL) 117 db->cursor(db, NULL, &cursor, 0); 118 if(cursor->c_get(cursor, &key, &value, flags) != 0) { 119 datum.dptr = NULL; 120 datum.dsize = 0; 121 } else 122 DBT2DATUM(&value, &datum); 123#else 124 db->seq(db, &key, &value, flags); 125 DBT2DATUM(&value, &datum); 126#endif 127 return datum; 128} 129 130#ifndef DB_FIRST 131#define DB_FIRST R_FIRST 132#define DB_NEXT R_NEXT 133#define DB_NOOVERWRITE R_NOOVERWRITE 134#define DB_KEYEXIST 1 135#endif 136 137ROKEN_LIB_FUNCTION datum ROKEN_LIB_CALL 138dbm_firstkey (DBM *db) 139{ 140 return dbm_get(D(db), DB_FIRST); 141} 142 143ROKEN_LIB_FUNCTION datum ROKEN_LIB_CALL 144dbm_nextkey (DBM *db) 145{ 146 return dbm_get(D(db), DB_NEXT); 147} 148 149ROKEN_LIB_FUNCTION DBM* ROKEN_LIB_CALL 150dbm_open (const char *file, int flags, mode_t mode) 151{ 152#ifdef HAVE_DB3 153 int myflags = 0; 154#endif 155 DB *db; 156 char *fn = malloc(strlen(file) + 4); 157 if(fn == NULL) 158 return NULL; 159 strcpy(fn, file); 160 strcat(fn, ".db"); 161#ifdef HAVE_DB3 162 if (flags & O_CREAT) 163 myflags |= DB_CREATE; 164 165 if (flags & O_EXCL) 166 myflags |= DB_EXCL; 167 168 if (flags & O_RDONLY) 169 myflags |= DB_RDONLY; 170 171 if (flags & O_TRUNC) 172 myflags |= DB_TRUNCATE; 173 if(db_create(&db, NULL, 0) != 0) { 174 free(fn); 175 return NULL; 176 } 177 178#if (DB_VERSION_MAJOR > 3) && (DB_VERSION_MINOR > 0) 179 if(db->open(db, NULL, fn, NULL, DB_BTREE, myflags, mode) != 0) { 180#else 181 if(db->open(db, fn, NULL, DB_BTREE, myflags, mode) != 0) { 182#endif 183 free(fn); 184 db->close(db, 0); 185 return NULL; 186 } 187#else 188 db = dbopen(fn, flags, mode, DB_BTREE, NULL); 189#endif 190 free(fn); 191 return (DBM*)db; 192} 193 194ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL 195dbm_store (DBM *db, datum dkey, datum dvalue, int flags) 196{ 197 int ret; 198 DBT key, value; 199 int myflags = 0; 200 if((flags & DBM_REPLACE) == 0) 201 myflags |= DB_NOOVERWRITE; 202 DATUM2DBT(&dkey, &key); 203 DATUM2DBT(&dvalue, &value); 204 ret = D(db)->put(D(db), 205#ifdef HAVE_DB3 206 NULL, 207#endif 208&key, &value, myflags); 209 if(ret == DB_KEYEXIST) 210 return 1; 211 RETURN(ret); 212} 213 214ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL 215dbm_error (DBM *db) 216{ 217 return 0; 218} 219 220ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL 221dbm_clearerr (DBM *db) 222{ 223 return 0; 224} 225 226