| 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 -------------------------------------------------*/ |