67 lines
2.2 KiB
C
67 lines
2.2 KiB
C
#ifndef _BITVEC_H
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#define _BITVEC_H
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/* bit vector utility routines */
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/* (C) 2009 by Harald Welte <laforge@gnumonks.org>
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*
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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/*! \defgroup bitvec Bit vectors
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* @{
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*/
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/*! \file bitvec.h
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* \brief Osmocom bit vector abstraction
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*/
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#include <stdint.h>
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/*! \brief A single GSM bit
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*
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* In GSM mac blocks, every bit can be 0 or 1, or L or H. L/H are
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* defined relative to the 0x2b padding pattern */
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enum bit_value {
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ZERO = 0, /*!< \brief A zero (0) bit */
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ONE = 1, /*!< \brief A one (1) bit */
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L = 2, /*!< \brief A CSN.1 "L" bit */
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H = 3, /*!< \brief A CSN.1 "H" bit */
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};
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/*! \brief structure describing a bit vector */
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struct bitvec {
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unsigned int cur_bit; /*!< \brief curser to the next unused bit */
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unsigned int data_len; /*!< \brief length of data array in bytes */
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uint8_t *data; /*!< \brief pointer to data array */
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};
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enum bit_value bitvec_get_bit_pos(const struct bitvec *bv, unsigned int bitnr);
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enum bit_value bitvec_get_bit_pos_high(const struct bitvec *bv,
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unsigned int bitnr);
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unsigned int bitvec_get_nth_set_bit(const struct bitvec *bv, unsigned int n);
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int bitvec_set_bit_pos(struct bitvec *bv, unsigned int bitnum,
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enum bit_value bit);
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int bitvec_set_bit(struct bitvec *bv, enum bit_value bit);
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int bitvec_get_bit_high(struct bitvec *bv);
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int bitvec_set_bits(struct bitvec *bv, enum bit_value *bits, int count);
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int bitvec_set_uint(struct bitvec *bv, unsigned int in, int count);
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int bitvec_get_uint(struct bitvec *bv, int num_bits);
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int bitvec_find_bit_pos(const struct bitvec *bv, unsigned int n, enum bit_value val);
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int bitvec_spare_padding(struct bitvec *bv, unsigned int up_to_bit);
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/*! @} */
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#endif /* _BITVEC_H */
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