/*
 * See the file LICENSE for redistribution information.
 *
 * Copyright (c) 2005, 2012 Oracle and/or its affiliates.  All rights reserved.
 *
 * $Id$
 */
#include "bench.h"

static int usage(void);

int
b_del(int argc, char *argv[])
{
	extern char *optarg;
	extern int optind;
	DB *dbp;
	DBC *dbc;
	DBT key, data;
	DBTYPE type;
#if DB_VERSION_MAJOR > 5 || (DB_VERSION_MAJOR == 5 && DB_VERSION_MINOR >= 2)
	DB_HEAP_RID rid;
#endif
	db_recno_t recno;
	u_int32_t cachesize;
	int ch, i, count, ret, use_cursor;
	char *ts, buf[32];

	type = DB_BTREE;
	cachesize = MEGABYTE;
	count = 100000;
	use_cursor = 0;
	ts = "Btree";
	while ((ch = getopt(argc, argv, "C:c:t:w")) != EOF)
		switch (ch) {
		case 'C':
			cachesize = (u_int32_t)atoi(optarg);
			break;
		case 'c':
			count = atoi(optarg);
			break;
		case 't':
			switch (optarg[0]) {
			case 'B': case 'b':
				ts = "Btree";
				type = DB_BTREE;
				break;
			case 'H': case 'h':
				if (optarg[1] == 'E' || optarg[1] == 'e') {
#if DB_VERSION_MAJOR > 5 || (DB_VERSION_MAJOR == 5 && DB_VERSION_MINOR >= 2)
					if (b_util_have_heap())
						return (0);
					ts = "Heap";
					type = DB_HEAP;
#else
					fprintf(stderr,
				"b_curwalk: Heap is not supported! \n");
					return (EXIT_SUCCESS);
#endif
				} else {
					if (b_util_have_hash())
						return (0);
					ts = "Hash";
					type = DB_HASH;
				}
				break;
			case 'Q': case 'q':
				if (b_util_have_queue())
					return (0);
				ts = "Queue";
				type = DB_QUEUE;
				break;
			case 'R': case 'r':
				ts = "Recno";
				type = DB_RECNO;
				break;
			default:
				return (usage());
			}
			break;
		case 'w':
			use_cursor = 1;
			break;
		case '?':
		default:
			return (usage());
		}
	argc -= optind;
	argv += optind;
	if (argc != 0)
		return (usage());

	/* Create the database. */
	DB_BENCH_ASSERT(db_create(&dbp, NULL, 0) == 0);
	DB_BENCH_ASSERT(dbp->set_cachesize(dbp, 0, cachesize, 0) == 0);
	dbp->set_errfile(dbp, stderr);

#if DB_VERSION_MAJOR > 5 || (DB_VERSION_MAJOR == 5 && DB_VERSION_MINOR >= 2)
	/* Need a cursor if using Heap. */
	if (type == DB_HEAP && !use_cursor) {
		printf("Heap databases require the -w flag.\n");
		return (-1);
	}
#endif

	/* Set record length for Queue. */
	if (type == DB_QUEUE)
		DB_BENCH_ASSERT(dbp->set_re_len(dbp, 20) == 0);

#if DB_VERSION_MAJOR > 4 || (DB_VERSION_MAJOR == 4 && DB_VERSION_MINOR >= 1)
	DB_BENCH_ASSERT(
	    dbp->open(dbp, NULL, TESTFILE, NULL, type, DB_CREATE, 0666) == 0);
#else
	DB_BENCH_ASSERT(
	    dbp->open(dbp, TESTFILE, NULL, type, DB_CREATE, 0666) == 0);
#endif

	/* Initialize the data. */
	memset(&key, 0, sizeof(key));
	memset(&data, 0, sizeof(data));
	data.data = "01234567890123456789";
	data.size = 20;

	/* Store a key/data pair. */
	switch (type) {
	case DB_BTREE:
	case DB_HASH:
		key.data = buf;
		key.size = 10;
		break;
#if DB_VERSION_MAJOR > 5 || (DB_VERSION_MAJOR == 5 && DB_VERSION_MINOR >= 2)
	case DB_HEAP:
		key.data = &rid;
		key.size = sizeof(rid);
		break;
#endif
	case DB_QUEUE:
	case DB_RECNO:
		key.data = &recno;
		key.size = sizeof(recno);
		break;
	case DB_UNKNOWN:
		b_util_abort();
		break;
	}

	/* Insert count in-order key/data pairs. */
	if (type == DB_BTREE || type == DB_HASH)
		for (i = 0; i < count; ++i) {
			(void)snprintf(buf, sizeof(buf), "%010d", i);
			DB_BENCH_ASSERT(
			    dbp->put(dbp, NULL, &key, &data, 0) == 0);
		}
#if DB_VERSION_MAJOR > 5 || (DB_VERSION_MAJOR == 5 && DB_VERSION_MINOR >= 2)
	else if (type == DB_HEAP)
		for (i = 0; i < count; i++)
			DB_BENCH_ASSERT(
			    dbp->put(dbp, NULL, &key, &data, DB_APPEND) == 0);
#endif
	else
		for (i = 0, recno = 1; i < count; ++i, ++recno)
			DB_BENCH_ASSERT(
			    dbp->put(dbp, NULL, &key, &data, 0) == 0);

	/* Delete the records. */
	TIMER_START;
	if (use_cursor) {
		DB_BENCH_ASSERT(dbp->cursor(dbp, NULL, &dbc, 0) == 0);
		while ((ret = dbc->c_get(dbc, &key, &data, DB_NEXT)) == 0)
			DB_BENCH_ASSERT(dbc->c_del(dbc, 0) == 0);
		DB_BENCH_ASSERT (ret == DB_NOTFOUND);
	} else
		if (type == DB_BTREE || type == DB_HASH)
			for (i = 0; i < count; ++i) {
				(void)snprintf(buf, sizeof(buf), "%010d", i);
				DB_BENCH_ASSERT(
				    dbp->del(dbp, NULL, &key, 0) == 0);
			}
		else
			for (i = 0, recno = 1; i < count; ++i, ++recno)
				DB_BENCH_ASSERT(
				    dbp->del(dbp, NULL, &key, 0) == 0);

	TIMER_STOP;

	printf(
    "# %d %s database in-order delete of 10/20 byte key/data pairs using %s\n",
	    count, ts, use_cursor ? "a cursor" : "the key");
	TIMER_DISPLAY(count);

	DB_BENCH_ASSERT(dbp->close(dbp, 0) == 0);

	return (0);
}

static int
usage()
{
	(void)fprintf(stderr,
	    "usage: b_del [-w] [-C cachesz] [-c count] [-t type]\n");
	return (EXIT_FAILURE);
}