1 /*-
2 * Copyright (c) 2015 The NetBSD Foundation, Inc.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to The NetBSD Foundation
6 * by Christos Zoulas.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27 * POSSIBILITY OF SUCH DAMAGE.
28 */
29 #include <sys/cdefs.h>
30 __RCSID("$NetBSD: h_lfsr.c,v 1.2 2017/06/24 10:25:23 gson Exp $");
31
32 #include <stdio.h>
33 #include <stdlib.h>
34 #include <fcntl.h>
35 #include <err.h>
36 #include <string.h>
37 #include <unistd.h>
38 #include <db.h>
39
40 #define MAXKEY 1000
41 #ifdef DEBUG
42 #define DPRINTF(...) printf(__VA_ARGS__)
43 #else
44 #define DPRINTF(...)
45 #endif
46
47 static uint16_t
next(uint16_t * cur)48 next(uint16_t *cur)
49 {
50 uint16_t lsb = *cur & 1;
51 *cur >>= 1;
52 *cur ^= (-lsb) & 0xB400u;
53 return *cur;
54 }
55
56 int
main(int argc,char * argv[])57 main(int argc, char *argv[])
58 {
59 char buf[65536];
60 char kb[256];
61 DBT key, val;
62 DB *db;
63 HASHINFO hi;
64 uint8_t c;
65 uint16_t len;
66 uint32_t pagesize = atoi(argv[1]);
67
68 memset(&hi, 0, sizeof(hi));
69 memset(buf, 'a', sizeof(buf));
70 hi.bsize = pagesize;
71 hi.nelem = 65536;
72 hi.ffactor = 128;
73
74 key.data = kb;
75 val.data = buf;
76
77 db = dbopen(NULL, O_CREAT|O_TRUNC|O_RDWR, 0, DB_HASH, &hi);
78 if (db == NULL)
79 err(EXIT_FAILURE, "dbopen");
80
81 len = 0xaec1;
82 for (size_t i = 0; i < MAXKEY; i++) {
83 key.size = (len & 0xff) + 1;
84 c = len >> 8;
85 memset(kb, c, key.size);
86 val.size = (next(&len) & 0xff) + 1;
87 switch ((*db->put)(db, &key, &val, R_NOOVERWRITE)) {
88 case 0:
89 DPRINTF("put %zu %zu %#x\n",
90 key.size, val.size, c);
91 break;
92 case -1:
93 err(EXIT_FAILURE, "put error %zu %zu %#x",
94 key.size, val.size, c);
95 case 1:
96 errx(EXIT_FAILURE, "put overwrite %zu %zu %#x",
97 key.size, val.size, c);
98 default:
99 abort();
100 }
101 }
102
103 len = 0xaec1;
104 for (size_t i = 0; i < MAXKEY; i++) {
105 key.size = (len & 0xff) + 1;
106 c = len >> 8;
107 memset(kb, c, key.size);
108 next(&len);
109 switch ((*db->get)(db, &key, &val, 0)) {
110 case 0:
111 DPRINTF("get %zu %zu %#x\n",
112 key.size, val.size, c);
113 break;
114 case -1:
115 err(EXIT_FAILURE, "get %zu %zu %#x",
116 key.size, val.size, c);
117 case 1:
118 errx(EXIT_FAILURE, "get not found %zu %zu %#x",
119 key.size, val.size, c);
120 default:
121 abort();
122 }
123 if (memcmp(key.data, kb, key.size) != 0)
124 errx(EXIT_FAILURE, "get badkey %zu %zu %#x",
125 key.size, val.size, c);
126 if (val.size != (len & 0xff) + 1U)
127 errx(EXIT_FAILURE, "get badvallen %zu %zu %#x",
128 key.size, val.size, c);
129 if (memcmp(val.data, buf, val.size) != 0)
130 errx(EXIT_FAILURE, "get badval %zu %zu %#x",
131 key.size, val.size, c);
132 }
133
134 len = 0xaec1;
135 for (size_t i = 0; i < MAXKEY; i++) {
136 key.size = (len & 0xff) + 1;
137 c = len >> 8;
138 memset(kb, c, key.size);
139 next(&len);
140 switch ((*db->del)(db, &key, 0)) {
141 case 0:
142 DPRINTF("del %zu %zu %#x\n",
143 key.size, val.size, c);
144 break;
145 case -1:
146 err(EXIT_FAILURE, "del %zu %zu %#x", key.size,
147 val.size, c);
148 case 1:
149 errx(EXIT_FAILURE, "del not found %zu %zu %#x",
150 key.size, val.size, c);
151 default:
152 abort();
153 }
154 }
155
156 len = 0xaec1;
157 for (size_t i = 0; i < MAXKEY; i++) {
158 key.size = (len & 0xff) + 1;
159 c = len >> 8;
160 memset(kb, c, key.size);
161 next(&len);
162 switch ((*db->get)(db, &key, &val, 0)) {
163 case 0:
164 errx(EXIT_FAILURE, "get2 found %zu %zu %#x",
165 key.size, val.size, c);
166 break;
167 case -1:
168 err(EXIT_FAILURE, "get2 %zu %zu %#x",
169 key.size, val.size, c);
170 case 1:
171 DPRINTF("get2 %zu %zu %#x\n",
172 key.size, val.size, c);
173 break;
174 default:
175 abort();
176 }
177 }
178 return 0;
179 }
180