2 * CRC32 (Castagnoli 1993)
4 * Based on Michael E. Kounavis and Frank L. Berry: A Systematic Approach
5 * to Building High Performance Software-based CRC Generators
6 * (Proceedings of the 10th IEEE Symposium on Computers and Communications 2005)
8 * Includes code from http://sourceforge.net/projects/slicing-by-8/,
9 * which carried the following copyright notice:
11 * Copyright (c) 2004-2006 Intel Corporation - All Rights Reserved
13 * This software program is licensed subject to the BSD License,
14 * available at http://www.opensource.org/licenses/bsd-license.html
16 * Adapted for LibUCW by Martin Mares <mj@ucw.cz> in 2012.
20 * Internal CRC calculator context.
21 * You should use it just as an opaque handle only.
23 typedef struct crc32_context {
25 void (*update_func)(struct crc32_context *ctx, const byte *buf, uns len);
28 void crc32_init(crc32_context *ctx, uns crc_mode);
38 crc32_update(crc32_context *ctx, const byte *buf, uns len)
40 ctx->update_func(ctx, buf, len);
44 crc32_final(crc32_context *ctx)
46 return ctx->state ^ 0xffffffff;