text: /*-
   * Copyright (c) 1990, 1993
   *	The Regents of the University of California.  All rights reserved.
   *
   * This code is derived from software contributed to Berkeley by
   * Margo Seltzer.
   *
   * 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.
   * 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 REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
   */
  
  #if defined(LIBC_SCCS) && !defined(lint)
  static char sccsid[] = "@(#)ndbm.c	8.4 (Berkeley) 7/21/94";
  #endif /* LIBC_SCCS and not lint */
  #include <sys/cdefs.h>
  __FBSDID("$FreeBSD: releng/11.1/lib/libc/db/hash/ndbm.c 301066 2016-05-31 18:32:57Z ed $");
  
  /*
   * This package provides a dbm compatible interface to the new hashing
   * package described in db(3).
   */
  
  #include <sys/param.h>
  
  #include <stdio.h>
  #include <string.h>
  #include <errno.h>
  
  #include <ndbm.h>
  #include "hash.h"
  
  /*
   * Returns:
   * 	*DBM on success
   *	 NULL on failure
   */
  extern DBM *
  dbm_open(const char *file, int flags, mode_t mode)
  {
  	HASHINFO info;
  	char path[MAXPATHLEN];
  
  	info.bsize = 4096;
  	info.ffactor = 40;
  	info.nelem = 1;
  	info.cachesize = 0;
  	info.hash = NULL;
  	info.lorder = 0;
  
  	if( strlen(file) >= sizeof(path) - strlen(DBM_SUFFIX)) {
  		errno = ENAMETOOLONG;
  		return(NULL);
  	}
  	(void)strcpy(path, file);
  	(void)strcat(path, DBM_SUFFIX);
  	return ((DBM *)__hash_open(path, flags, mode, &info, 0));
  }
  
  extern void
  dbm_close(DBM *db)
  {
  	(void)(db->close)(db);
  }
  
  /*
   * Returns:
   *	DATUM on success
   *	NULL on failure
   */
  extern datum
  dbm_fetch(DBM *db, datum key)
  {
  	datum retdata;
  	int status;
  	DBT dbtkey, dbtretdata;
  
  	dbtkey.data = key.dptr;
  	dbtkey.size = key.dsize;
  	status = (db->get)(db, &dbtkey, &dbtretdata, 0);
  	if (status) {
  		dbtretdata.data = NULL;
  		dbtretdata.size = 0;
  	}
  	retdata.dptr = dbtretdata.data;
  	retdata.dsize = dbtretdata.size;
  	return (retdata);
  }
  
  /*
   * Returns:
   *	DATUM on success
   *	NULL on failure
   */
  extern datum
  dbm_firstkey(DBM *db)
  {
  	int status;
  	datum retkey;
  	DBT dbtretkey, dbtretdata;
  
  	status = (db->seq)(db, &dbtretkey, &dbtretdata, R_FIRST);
  	if (status)
  		dbtretkey.data = NULL;
  	retkey.dptr = dbtretkey.data;
  	retkey.dsize = dbtretkey.size;
  	return (retkey);
  }
  
  /*
   * Returns:
   *	DATUM on success
   *	NULL on failure
   */
  extern datum
  dbm_nextkey(DBM *db)
  {
  	int status;
  	datum retkey;
  	DBT dbtretkey, dbtretdata;
  
  	status = (db->seq)(db, &dbtretkey, &dbtretdata, R_NEXT);
  	if (status)
  		dbtretkey.data = NULL;
  	retkey.dptr = dbtretkey.data;
  	retkey.dsize = dbtretkey.size;
  	return (retkey);
  }
  
  /*
   * Returns:
   *	 0 on success
   *	<0 failure
   */
  extern int
  dbm_delete(DBM *db, datum key)
  {
  	int status;
  	DBT dbtkey;
  
  	dbtkey.data = key.dptr;
  	dbtkey.size = key.dsize;
  	status = (db->del)(db, &dbtkey, 0);
  	if (status)
  		return (-1);
  	else
  		return (0);
  }
  
  /*
   * Returns:
   *	 0 on success
   *	<0 failure
   *	 1 if DBM_INSERT and entry exists
   */
  extern int
  dbm_store(DBM *db, datum key, datum data, int flags)
  {
  	DBT dbtkey, dbtdata;
  
  	dbtkey.data = key.dptr;
  	dbtkey.size = key.dsize;
  	dbtdata.data = data.dptr;
  	dbtdata.size = data.dsize;
  	return ((db->put)(db, &dbtkey, &dbtdata,
  	    (flags == DBM_INSERT) ? R_NOOVERWRITE : 0));
  }
  
  extern int
  dbm_error(DBM *db)
  {
  	HTAB *hp;
  
  	hp = (HTAB *)db->internal;
  	return (hp->error);
  }
  
  extern int
  dbm_clearerr(DBM *db)
  {
  	HTAB *hp;
  
  	hp = (HTAB *)db->internal;
  	hp->error = 0;
  	return (0);
  }
  
  extern int
  dbm_dirfno(DBM *db)
  {
  	return(((HTAB *)db->internal)->fp);
  }
  