40b0b3f8fb
Based on 2 normalized pattern(s): this source code is licensed under the gnu general public license version 2 see the file copying for more details this source code is licensed under general public license version 2 see extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 52 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190602204653.449021192@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
27 lines
531 B
C
27 lines
531 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* crc-itu-t.h - CRC ITU-T V.41 routine
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*
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* Implements the standard CRC ITU-T V.41:
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* Width 16
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* Poly 0x1021 (x^16 + x^12 + x^15 + 1)
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* Init 0
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*/
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#ifndef CRC_ITU_T_H
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#define CRC_ITU_T_H
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#include <linux/types.h>
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extern u16 const crc_itu_t_table[256];
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extern u16 crc_itu_t(u16 crc, const u8 *buffer, size_t len);
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static inline u16 crc_itu_t_byte(u16 crc, const u8 data)
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{
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return (crc << 8) ^ crc_itu_t_table[((crc >> 8) ^ data) & 0xff];
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}
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#endif /* CRC_ITU_T_H */
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