mirror of
https://github.com/xemu-project/xemu.git
synced 2024-11-30 23:10:38 +00:00
0b73ce3060
Import CRC16 calculation routines from Linux kernel v5.10: include/linux/crc-ccitt.h lib/crc-ccitt.c to QEMU: include/qemu/crc-ccitt.h util/crc-ccitt.c Signed-off-by: Bin Meng <bin.meng@windriver.com> Acked-by: Alistair Francis <alistair.francis@wdc.com> Message-Id: <20210123104016.17485-7-bmeng.cn@gmail.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> [PMD: Restrict compilation to system emulation] Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
34 lines
841 B
C
34 lines
841 B
C
/*
|
|
* CRC16 (CCITT) Checksum Algorithm
|
|
*
|
|
* Copyright (c) 2021 Wind River Systems, Inc.
|
|
*
|
|
* Author:
|
|
* Bin Meng <bin.meng@windriver.com>
|
|
*
|
|
* From Linux kernel v5.10 include/linux/crc-ccitt.h
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0
|
|
*/
|
|
|
|
#ifndef _CRC_CCITT_H
|
|
#define _CRC_CCITT_H
|
|
|
|
extern uint16_t const crc_ccitt_table[256];
|
|
extern uint16_t const crc_ccitt_false_table[256];
|
|
|
|
extern uint16_t crc_ccitt(uint16_t crc, const uint8_t *buffer, size_t len);
|
|
extern uint16_t crc_ccitt_false(uint16_t crc, const uint8_t *buffer, size_t len);
|
|
|
|
static inline uint16_t crc_ccitt_byte(uint16_t crc, const uint8_t c)
|
|
{
|
|
return (crc >> 8) ^ crc_ccitt_table[(crc ^ c) & 0xff];
|
|
}
|
|
|
|
static inline uint16_t crc_ccitt_false_byte(uint16_t crc, const uint8_t c)
|
|
{
|
|
return (crc << 8) ^ crc_ccitt_false_table[(crc >> 8) ^ c];
|
|
}
|
|
|
|
#endif /* _CRC_CCITT_H */
|