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Diffstat (limited to 'wsutil/crc5.h')
| -rw-r--r-- | wsutil/crc5.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/wsutil/crc5.h b/wsutil/crc5.h new file mode 100644 index 00000000..4f834d53 --- /dev/null +++ b/wsutil/crc5.h @@ -0,0 +1,40 @@ +/** @file + * Declaration of CRC-5 routines and table + * + * 2019 Tomasz Mon <desowin@gmail.com> + * + * Wireshark - Network traffic analyzer + * By Gerald Combs <gerald@wireshark.org> + * Copyright 1998 Gerald Combs + * + * SPDX-License-Identifier: GPL-2.0-or-later +*/ + +#ifndef __CRC5_H__ +#define __CRC5_H__ + +#include <wireshark.h> + +#ifdef __cplusplus +extern "C" { +#endif /* __cplusplus */ + +/** Compute the 5-bit CRC value of a input value matching the CRC-5 + defined in USB 2.0 Specification. This function calculates the CRC + on low 11 bits of the input value. High bits are ignored. + @param input Source data for which the CRC-5 should be calculated. + @return the CRC5 checksum for input value */ +WS_DLL_PUBLIC uint8_t crc5_usb_11bit_input(uint16_t input); + +/** Compute the 5-bit CRC value of a input value matching the CRC-5 + defined in USB 2.0 Specification. This function calculates the CRC + on low 19 bits of the input value. High bits are ignored. + @param input Source data for which the CRC-5 should be calculated. + @return the CRC5 checksum for input value */ +WS_DLL_PUBLIC uint8_t crc5_usb_19bit_input(uint32_t input); + +#ifdef __cplusplus +} +#endif /* __cplusplus */ + +#endif /* __CRC5_H__ */ |