1 /* 2 * Copyright (C) 2008-2010 Daisuke Aoyama <aoyama@peach.ne.jp>. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 */ 27 28 #ifndef ISTGT_CRC32C_H 29 #define ISTGT_CRC32C_H 30 31 #include <stdint.h> 32 #include <stddef.h> 33 #include <sys/uio.h> 34 35 #define ISTGT_USE_CRC32C_TABLE 36 #define ISTGT_CRC32C_INITIAL 0xffffffffUL 37 #define ISTGT_CRC32C_XOR 0xffffffffUL 38 #define ISTGT_CRC32C_POLYNOMIAL 0x1edc6f41UL 39 40 void istgt_init_crc32c_table(void); 41 uint32_t istgt_update_crc32c(const uint8_t *buf, size_t len, uint32_t crc); 42 uint32_t istgt_fixup_crc32c(size_t total, uint32_t crc); 43 uint32_t istgt_crc32c(const uint8_t *buf, size_t len); 44 uint32_t istgt_iovec_crc32c(const struct iovec *iovp, int iovc, uint32_t offset, uint32_t len); 45 46 #endif /* ISTGT_CRC32C_H */ 47