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7cf5c72a MW |
1 | /* -*-c-*- |
2 | * | |
3 | * Test driver for CRC | |
4 | * | |
5 | * (c) 2009 Straylight/Edgeware | |
6 | */ | |
7 | ||
8 | /*----- Licensing notice --------------------------------------------------* | |
9 | * | |
10 | * This file is part of the mLib utilities library. | |
11 | * | |
12 | * mLib is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU Library General Public License as | |
14 | * published by the Free Software Foundation; either version 2 of the | |
15 | * License, or (at your option) any later version. | |
16 | * | |
17 | * mLib is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU Library General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU Library General Public | |
23 | * License along with mLib; if not, write to the Free | |
24 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, | |
25 | * MA 02111-1307, USA. | |
26 | */ | |
27 | ||
28 | /*----- Header files ------------------------------------------------------*/ | |
29 | ||
30 | #include <stdio.h> | |
31 | ||
32 | #include "crc32.h" | |
33 | #include "testrig.h" | |
34 | ||
35 | /*----- Main code ---------------------------------------------------------*/ | |
36 | ||
37 | static int verify(dstr *v) | |
38 | { | |
39 | uint32 h, hh; | |
40 | size_t n; | |
41 | int i, c; | |
42 | const char *p; | |
43 | int ok = 1; | |
44 | ||
45 | static const int step[] = { 0, 1, 5, 6, 7, 8, 23, -1 }; | |
46 | ||
47 | /* --- Set up for using this key --- */ | |
48 | ||
49 | h = *(uint32 *)v[1].buf; | |
50 | ||
51 | /* --- Hash the data a lot --- */ | |
52 | ||
53 | for (i = 0; step[i] >= 0; i++) { | |
54 | c = step[i]; | |
55 | if (!c) | |
56 | hh = crc32(0, v[0].buf, v[0].len); | |
57 | else { | |
58 | hh = 0; | |
59 | p = v[0].buf; | |
60 | n = v[0].len; | |
61 | while (n) { | |
62 | if (c > n) c = n; | |
63 | hh = crc32(hh, p, c); | |
64 | p += c; | |
65 | n -= c; | |
66 | } | |
67 | } | |
68 | if (h != hh) { | |
69 | ok = 0; | |
70 | fprintf(stderr, "\ncrc32 failed\n"); | |
71 | fprintf(stderr, " data = %s\n", v[0].buf); | |
72 | fprintf(stderr, " step = %d\n", step[i]); | |
73 | fprintf(stderr, " expected = %08lx\n", (unsigned long)h); | |
74 | fprintf(stderr, " computed = %08lx\n", (unsigned long)hh); | |
75 | } | |
76 | } | |
77 | return (ok); | |
78 | } | |
79 | ||
80 | static const test_chunk tests[] = { | |
81 | { "hash", verify, { &type_string, &type_uint32 } }, | |
82 | { 0, 0, { 0 } } | |
83 | }; | |
84 | ||
85 | int main(int argc, char *argv[]) | |
86 | { | |
87 | test_run(argc, argv, tests, "crc32.in"); | |
88 | return (0); | |
89 | } | |
90 | ||
91 | /*----- That's all, folks -------------------------------------------------*/ |