1 #pragma ident "%Z%%M% %I% %E% SMI" 2 3 /*- 4 * Copyright (c) 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Margo Seltzer. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39 #if defined(LIBC_SCCS) && !defined(lint) 40 static char sccsid[] = "@(#)hsearch.c 8.5 (Berkeley) 9/21/94"; 41 #endif /* LIBC_SCCS and not lint */ 42 43 #include <sys/types.h> 44 45 #include <fcntl.h> 46 #include <string.h> 47 48 #include "db-int.h" 49 #include "search.h" 50 51 static DB *dbp = NULL; 52 static ENTRY retval; 53 54 extern int 55 hcreate(nel) 56 u_int nel; 57 { 58 HASHINFO info; 59 60 info.nelem = nel; 61 info.bsize = 256; 62 info.ffactor = 8; 63 info.cachesize = 0; 64 info.hash = NULL; 65 info.lorder = 0; 66 dbp = (DB *)__hash_open(NULL, O_CREAT | O_RDWR | O_BINARY, 0600, &info, 0); 67 return (dbp != NULL); 68 } 69 70 extern ENTRY * 71 hsearch(item, action) 72 ENTRY item; 73 ACTION action; 74 { 75 DBT key, val; 76 int status; 77 78 if (!dbp) 79 return (NULL); 80 key.data = (u_char *)item.key; 81 key.size = strlen(item.key) + 1; 82 83 if (action == ENTER) { 84 val.data = (u_char *)item.data; 85 val.size = strlen(item.data) + 1; 86 status = (dbp->put)(dbp, &key, &val, R_NOOVERWRITE); 87 if (status) 88 return (NULL); 89 } else { 90 /* FIND */ 91 status = (dbp->get)(dbp, &key, &val, 0); 92 if (status) 93 return (NULL); 94 else 95 item.data = (char *)val.data; 96 } 97 retval.key = item.key; 98 retval.data = item.data; 99 return (&retval); 100 } 101 102 extern void 103 hdestroy() 104 { 105 if (dbp) { 106 (void)(dbp->close)(dbp); 107 dbp = NULL; 108 } 109 } 110