mirror of
https://git.zap.org.au/git/trader.git
synced 2024-11-03 17:27:29 -05:00
d07dc71f1b
These files have been created by running ./build-aux/bootstrap with Gnulib as at commit f9b39c4e337f1dc0dd07c4f3985c476fb875d799 (with a date stamp of Sun Jul 31 23:28:18 2022 +0200), Autoconf 2.71, Automake 1.16.5, Gettext 0.21 and pkgconf 1.8.0.
48 lines
1.9 KiB
C
48 lines
1.9 KiB
C
/* crc.h -- cyclic redundancy checks
|
|
Copyright (C) 2005, 2009-2022 Free Software Foundation, Inc.
|
|
|
|
This file is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU Lesser General Public License as
|
|
published by the Free Software Foundation, either version 3 of the
|
|
License, or (at your option) any later version.
|
|
|
|
This file is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with this program. If not, see <https://www.gnu.org/licenses/>. */
|
|
|
|
/* Written by Simon Josefsson. */
|
|
|
|
#ifndef CRC_H
|
|
# define CRC_H 1
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
/* Compute CRC-32 value of LEN bytes long BUF, and return it. */
|
|
extern uint32_t crc32 (const char *buf, size_t len);
|
|
|
|
/* Incrementally update CRC-32 value CRC using LEN bytes long BUF. In
|
|
the first call, use 0 as the value for CRC. Return the updated
|
|
CRC-32 value. */
|
|
extern uint32_t crc32_update (uint32_t crc, const char *buf, size_t len);
|
|
|
|
/* Compute modified-CRC-32 value of LEN bytes long BUF, and return it.
|
|
The "modification" is to avoid the initial and final XOR operation.
|
|
Due to historic implementation errors, this variant is sometimes
|
|
used (i.e., in RFC 3961). */
|
|
extern uint32_t crc32_no_xor (const char *buf, size_t len);
|
|
|
|
/* Incrementally update modified-CRC-32 value CRC using LEN bytes long
|
|
BUF. In the first call, use 0 as the value for CRC. Return the
|
|
updated modified-CRC-32 value. The "modification" is to avoid the
|
|
initial and final XOR operation. Due to historic implementation
|
|
errors, this variant is sometimes used (i.e., in RFC 3961). */
|
|
extern uint32_t
|
|
crc32_update_no_xor (uint32_t crc, const char *buf, size_t len);
|
|
|
|
#endif /* CRC_H */
|