1 /*- 2 * Copyright (c) 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Margo Seltzer. 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 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 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 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #if defined(LIBC_SCCS) && !defined(lint) 38 static char sccsid[] = "@(#)hsearch.c 8.5 (Berkeley) 9/21/94"; 39 #endif /* LIBC_SCCS and not lint */ 40 41 #include <sys/types.h> 42 43 #include <fcntl.h> 44 #include <string.h> 45 46 #include "db-int.h" 47 #include "search.h" 48 49 static DB *dbp = NULL; 50 static ENTRY retval; 51 52 extern int 53 hcreate(nel) 54 u_int nel; 55 { 56 HASHINFO info; 57 58 info.nelem = nel; 59 info.bsize = 256; 60 info.ffactor = 8; 61 info.cachesize = 0; 62 info.hash = NULL; 63 info.lorder = 0; 64 dbp = (DB *)__hash_open(NULL, O_CREAT | O_RDWR | O_BINARY, 0600, &info, 0); 65 return (dbp != NULL); 66 } 67 68 extern ENTRY * 69 hsearch(item, action) 70 ENTRY item; 71 ACTION action; 72 { 73 DBT key, val; 74 int status; 75 76 if (!dbp) 77 return (NULL); 78 key.data = (u_char *)item.key; 79 key.size = strlen(item.key) + 1; 80 81 if (action == ENTER) { 82 val.data = (u_char *)item.data; 83 val.size = strlen(item.data) + 1; 84 status = (dbp->put)(dbp, &key, &val, R_NOOVERWRITE); 85 if (status) 86 return (NULL); 87 } else { 88 /* FIND */ 89 status = (dbp->get)(dbp, &key, &val, 0); 90 if (status) 91 return (NULL); 92 else 93 item.data = (char *)val.data; 94 } 95 retval.key = item.key; 96 retval.data = item.data; 97 return (&retval); 98 } 99 100 extern void 101 hdestroy() 102 { 103 if (dbp) { 104 (void)(dbp->close)(dbp); 105 dbp = NULL; 106 } 107 } 108