tread2.c

早期freebsd实现

/*-
 * Copyright (c) 1991, 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.
 * 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 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.
 */

#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1991, 1993\n\
	The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)tread2.c	8.1 (Berkeley) 6/4/93";
#endif /* not lint */

#include <sys/types.h>
#include <sys/file.h>
#include <stdio.h>
#include <db.h>

#define INITIAL	25000
#define MAXWORDS    25000	       /* # of elements in search table */

typedef struct {		       /* info to be stored */
	int num, siz;
} info;

char	wp1[8192];
char	wp2[8192];
main(argc, argv)
char **argv;
{
	DBT item, key, res;
	DB	*dbp;
	HASHINFO ctl;
	int	stat;

	int i = 0;

	ctl.nelem = INITIAL;
	ctl.hash = NULL;
	ctl.bsize = 64;
	ctl.ffactor = 1;
	ctl.cachesize = atoi(*argv++);
	ctl.lorder = 0;
	if (!(dbp = dbopen( "hashtest", O_RDONLY, 0400, DB_HASH, &ctl))) {
		/* create table */
		fprintf(stderr, "cannot open: hash table\n" );
		exit(1);
	}

	key.data = wp1;
	item.data = wp2;
	while ( fgets(wp1, 8192, stdin) &&
		fgets(wp2, 8192, stdin) &&
		i++ < MAXWORDS) {
/*
* put info in structure, and structure in the item
*/
		key.size = strlen(wp1);
		item.size = strlen(wp2);

		stat = (dbp->get)(dbp, &key, &res,0);
		if (stat < 0) {
		    fprintf ( stderr, "Error retrieving %s\n", key.data );
		    exit(1);
		} else if ( stat > 0 ) {
		    fprintf ( stderr, "%s not found\n", key.data );
		    exit(1);
		}
	}
	(dbp->close)(dbp);
	exit(0);
}