/* $OpenBSD: ypdb.c,v 1.5 1997/02/09 09:49:36 maja Exp $ */ /* * Copyright (c) 1990, 1993 * The Regents of the University of California. All rights reserved. * All rights reserved. * * This code is derived from software contributed to Berkeley by * Margo Seltzer. * * This code is derived from ndbm module of BSD4.4 db (hash) by * Mats O Jansson * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include #include #include #include #include "ypdb.h" #ifdef YPDB_PATCH extern DBM *__hash_open(); #else extern DBM *__bt_open(); #endif /* * Returns: * *DBM on success * NULL on failure */ extern DBM * ypdb_open(file, flags, mode) const char *file; int flags, mode; { #ifdef YPDB_PATCH HASHINFO info; char path[MAXPATHLEN]; info.bsize = 4096; info.ffactor = 40; info.nelem = 1; info.cachesize = NULL; info.hash = NULL; info.lorder = 0; snprintf(path, sizeof(path), "%s%s", file, YPDB_SUFFIX); return ((DBM *)__hash_open(path, flags, mode, &info, 0)); #else BTREEINFO info; char path[MAXPATHLEN]; DBM *db; info.flags = 0; info.cachesize = 0; info.maxkeypage = 0; info.minkeypage = 0; info.psize = 0; info.compare = NULL; info.prefix = NULL; info.lorder = 0; snprintf(path, sizeof(path), "%s%s", file, YPDB_SUFFIX); db = (DBM *)__bt_open(path, flags, mode, &info, 0); return (db); #endif } /* * Returns: * *DBM on success * NULL on failure */ extern DBM * ypdb_open_suf(file, flags, mode) const char *file; int flags, mode; { #ifdef YPDB_PATCH HASHINFO info; info.bsize = 4096; info.ffactor = 40; info.nelem = 1; info.cachesize = NULL; info.hash = NULL; info.lorder = 0; return ((DBM *)__hash_open(file, flags, mode, &info, 0)); #else BTREEINFO info; DBM *db; info.flags = 0; info.cachesize = 0; info.maxkeypage = 0; info.minkeypage = 0; info.psize = 0; info.compare = NULL; info.prefix = NULL; info.lorder = 0; db = (DBM *)__bt_open(file, flags, mode, &info, 0); return (db); #endif } extern void ypdb_close(db) DBM *db; { (void)(db->close)(db); } /* * Returns: * DATUM on success * NULL on failure */ extern datum ypdb_fetch(db, key) DBM *db; datum key; { datum retval; int status; status = (db->get)(db, (DBT *)&key, (DBT *)&retval, 0); if (status) { retval.dptr = NULL; retval.dsize = 0; } return (retval); } /* * Returns: * DATUM on success * NULL on failure */ extern datum ypdb_firstkey(db) DBM *db; { int status; datum retdata, retkey; status = (db->seq)(db, (DBT *)&retkey, (DBT *)&retdata, R_FIRST); if (status) retkey.dptr = NULL; return (retkey); } /* * Returns: * DATUM on success * NULL on failure */ extern datum ypdb_nextkey(db) DBM *db; { int status; datum retdata, retkey; status = (db->seq)(db, (DBT *)&retkey, (DBT *)&retdata, R_NEXT); if (status) retkey.dptr = NULL; return (retkey); } /* * Returns: * DATUM on success * NULL on failure */ extern datum ypdb_setkey(db, key) DBM *db; datum key; { int status; datum retdata; #ifdef YPDB_PATCH datum retkey; status = (db->seq)(db, (DBT *)&retkey, (DBT *)&retdata, R_FIRST); if (status) retkey.dptr = NULL; while ((retkey.dptr != NULL) && ((retkey.dsize != key.dsize) || (strncmp(key.dptr,retkey.dptr,retkey.dsize) != 0))) { status = (db->seq)(db, (DBT *)&retkey, (DBT *)&retdata, R_NEXT); if (status) retkey.dptr = NULL; }; return (retkey); #else status = (db->seq)(db, (DBT *)&key, (DBT *)&retdata, R_CURSOR); if (status) key.dptr = NULL; return (key); #endif } /* * Returns: * 0 on success * <0 failure */ int ypdb_delete(db, key) DBM *db; datum key; { int status; status = (db->del)(db, (DBT *)&key, 0); if (status) return (-1); else return (0); } /* * Returns: * 0 on success * <0 failure * 1 if YPDB_INSERT and entry exists */ int ypdb_store(db, key, content, flags) DBM *db; datum key, content; int flags; { return ((db->put)(db, (DBT *)&key, (DBT *)&content, (flags == YPDB_INSERT) ? R_NOOVERWRITE : 0)); }