f27ceeb60ad21fc91dd320a9909290e8caad2ef9
3 * Calculating cyclic redundancy values (non-cryptographic!)
5 * (c) 1998 Straylight/Edgeware
8 /*----- Licensing notice --------------------------------------------------*
10 * This file is part of the mLib utilities library.
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.
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.
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,
28 /*----- Header files ------------------------------------------------------*/
30 /* --- ANSI headers --- */
36 /* --- Local headers --- */
41 /*----- Functionc provided ------------------------------------------------*/
45 * Arguments: @uint32 crc@ = carryover from previous call, or zero
46 * @const void *buf@ = pointer to buffer to check
47 * @size_t sz@ = size of the buffer
49 * Returns: The CRC updated by the new buffer.
51 * Use: A restartable CRC calculator. This is just a function
52 * wrapper for the macro version.
55 uint32
crc32(uint32 crc
, const void *buf
, size_t sz
)
58 CRC32(c
, crc
, buf
, sz
);
62 /*----- Test driver -------------------------------------------------------*/
75 r
= fread(buf
, 1, sizeof(buf
), stdin
);
77 crc
= crc32(crc
, buf
, r
);
78 } while (r
== sizeof(buf
));
80 printf("crc32(stdin) = %08lx\n", (unsigned long)crc
);
86 /*----- That's all, folks -------------------------------------------------*/