1/*	$NetBSD: mtest6.c,v 1.3 2021/08/14 16:14:57 christos Exp $	*/
2
3/* mtest6.c - memory-mapped database tester/toy */
4/*
5 * Copyright 2011-2021 Howard Chu, Symas Corp.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted only as authorized by the OpenLDAP
10 * Public License.
11 *
12 * A copy of this license is available in the file LICENSE in the
13 * top-level directory of the distribution or, alternatively, at
14 * <http://www.OpenLDAP.org/license.html>.
15 */
16
17/* Tests for DB splits and merges */
18#include <stdio.h>
19#include <stdlib.h>
20#include <string.h>
21#include <time.h>
22#include "lmdb.h"
23
24#define E(expr) CHECK((rc = (expr)) == MDB_SUCCESS, #expr)
25#define RES(err, expr) ((rc = expr) == (err) || (CHECK(!rc, #expr), 0))
26#define CHECK(test, msg) ((test) ? (void)0 : ((void)fprintf(stderr, \
27	"%s:%d: %s: %s\n", __FILE__, __LINE__, msg, mdb_strerror(rc)), abort()))
28
29char dkbuf[1024];
30
31int main(int argc,char * argv[])
32{
33	int i = 0, j = 0, rc;
34	MDB_env *env;
35	MDB_dbi dbi;
36	MDB_val key, data, sdata;
37	MDB_txn *txn;
38	MDB_stat mst;
39	MDB_cursor *cursor;
40	int count;
41	int *values;
42	long kval;
43	char *sval;
44
45	srand(time(NULL));
46
47	E(mdb_env_create(&env));
48	E(mdb_env_set_mapsize(env, 10485760));
49	E(mdb_env_set_maxdbs(env, 4));
50	E(mdb_env_open(env, "./testdb", MDB_FIXEDMAP|MDB_NOSYNC, 0664));
51
52	E(mdb_txn_begin(env, NULL, 0, &txn));
53	E(mdb_dbi_open(txn, "id6", MDB_CREATE|MDB_INTEGERKEY, &dbi));
54	E(mdb_cursor_open(txn, dbi, &cursor));
55	E(mdb_stat(txn, dbi, &mst));
56
57	sval = calloc(1, mst.ms_psize / 4);
58	key.mv_size = sizeof(long);
59	key.mv_data = &kval;
60	sdata.mv_size = mst.ms_psize / 4 - 30;
61	sdata.mv_data = sval;
62
63	printf("Adding 12 values, should yield 3 splits\n");
64	for (i=0;i<12;i++) {
65		kval = i*5;
66		sprintf(sval, "%08x", kval);
67		data = sdata;
68		(void)RES(MDB_KEYEXIST, mdb_cursor_put(cursor, &key, &data, MDB_NOOVERWRITE));
69	}
70	printf("Adding 12 more values, should yield 3 splits\n");
71	for (i=0;i<12;i++) {
72		kval = i*5+4;
73		sprintf(sval, "%08x", kval);
74		data = sdata;
75		(void)RES(MDB_KEYEXIST, mdb_cursor_put(cursor, &key, &data, MDB_NOOVERWRITE));
76	}
77	printf("Adding 12 more values, should yield 3 splits\n");
78	for (i=0;i<12;i++) {
79		kval = i*5+1;
80		sprintf(sval, "%08x", kval);
81		data = sdata;
82		(void)RES(MDB_KEYEXIST, mdb_cursor_put(cursor, &key, &data, MDB_NOOVERWRITE));
83	}
84	E(mdb_cursor_get(cursor, &key, &data, MDB_FIRST));
85
86	do {
87		printf("key: %p %s, data: %p %.*s\n",
88			key.mv_data,  mdb_dkey(&key, dkbuf),
89			data.mv_data, (int) data.mv_size, (char *) data.mv_data);
90	} while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0);
91	CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
92	mdb_cursor_close(cursor);
93	mdb_txn_commit(txn);
94
95#if 0
96	j=0;
97
98	for (i= count - 1; i > -1; i-= (rand()%5)) {
99		j++;
100		txn=NULL;
101		E(mdb_txn_begin(env, NULL, 0, &txn));
102		sprintf(kval, "%03x", values[i & ~0x0f]);
103		sprintf(sval, "%03x %d foo bar", values[i], values[i]);
104		key.mv_size = sizeof(int);
105		key.mv_data = kval;
106		data.mv_size = sizeof(sval);
107		data.mv_data = sval;
108		if (RES(MDB_NOTFOUND, mdb_del(txn, dbi, &key, &data))) {
109			j--;
110			mdb_txn_abort(txn);
111		} else {
112			E(mdb_txn_commit(txn));
113		}
114	}
115	free(values);
116	printf("Deleted %d values\n", j);
117
118	E(mdb_env_stat(env, &mst));
119	E(mdb_txn_begin(env, NULL, MDB_RDONLY, &txn));
120	E(mdb_cursor_open(txn, dbi, &cursor));
121	printf("Cursor next\n");
122	while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) {
123		printf("key: %.*s, data: %.*s\n",
124			(int) key.mv_size,  (char *) key.mv_data,
125			(int) data.mv_size, (char *) data.mv_data);
126	}
127	CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
128	printf("Cursor prev\n");
129	while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_PREV)) == 0) {
130		printf("key: %.*s, data: %.*s\n",
131			(int) key.mv_size,  (char *) key.mv_data,
132			(int) data.mv_size, (char *) data.mv_data);
133	}
134	CHECK(rc == MDB_NOTFOUND, "mdb_cursor_get");
135	mdb_cursor_close(cursor);
136	mdb_txn_abort(txn);
137
138	mdb_dbi_close(env, dbi);
139#endif
140	mdb_env_close(env);
141
142	return 0;
143}
144