diff options
Diffstat (limited to 'lib/decoding/osmocom/core/crc16gen.h')
-rw-r--r-- | lib/decoding/osmocom/core/crc16gen.h | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/lib/decoding/osmocom/core/crc16gen.h b/lib/decoding/osmocom/core/crc16gen.h new file mode 100644 index 0000000..567b74e --- /dev/null +++ b/lib/decoding/osmocom/core/crc16gen.h @@ -0,0 +1,56 @@ +/* + * crc16gen.h + * + * Copyright (C) 2011 Sylvain Munaut <tnt@246tNt.com> + * + * All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#pragma once + +/*! \addtogroup crcgen + * @{ + */ + +/*! \file crc16gen.h + * Osmocom generic CRC routines (for max 16 bits poly) header + */ + + +#include <stdint.h> +#include <osmocom/core/bits.h> + + +/*! \brief structure describing a given CRC code of max 16 bits */ +struct osmo_crc16gen_code { + int bits; /*!< \brief Actual number of bits of the CRC */ + uint16_t poly; /*!< \brief Polynom (normal representation, MSB omitted */ + uint16_t init; /*!< \brief Initialization value of the CRC state */ + uint16_t remainder; /*!< \brief Remainder of the CRC (final XOR) */ +}; + +uint16_t osmo_crc16gen_compute_bits(const struct osmo_crc16gen_code *code, + const ubit_t *in, int len); +int osmo_crc16gen_check_bits(const struct osmo_crc16gen_code *code, + const ubit_t *in, int len, const ubit_t *crc_bits); +void osmo_crc16gen_set_bits(const struct osmo_crc16gen_code *code, + const ubit_t *in, int len, ubit_t *crc_bits); + + +/*! @} */ + +/* vim: set syntax=c: */ |