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Diffstat (limited to 'lib/decoding/osmocom/core/bitvec.h')
-rw-r--r-- | lib/decoding/osmocom/core/bitvec.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/lib/decoding/osmocom/core/bitvec.h b/lib/decoding/osmocom/core/bitvec.h new file mode 100644 index 0000000..84db9a5 --- /dev/null +++ b/lib/decoding/osmocom/core/bitvec.h @@ -0,0 +1,87 @@ +/* (C) 2009 by Harald Welte <laforge@gnumonks.org> + * (C) 2012 Ivan Klyuchnikov + * (C) 2015 sysmocom - s.f.m.c. GmbH + * + * 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 + +/*! \defgroup bitvec Bit vectors + * @{ + * \file bitvec.h */ + +#include <stdint.h> +//#include <osmocom/core/talloc.h> +#include <osmocom/core/defs.h> +#include <stdbool.h> + +/*! A single GSM bit + * + * In GSM mac blocks, every bit can be 0 or 1, or L or H. L/H are + * defined relative to the 0x2b padding pattern */ +enum bit_value { + ZERO = 0, /*!< A zero (0) bit */ + ONE = 1, /*!< A one (1) bit */ + L = 2, /*!< A CSN.1 "L" bit */ + H = 3, /*!< A CSN.1 "H" bit */ +}; + +/*! structure describing a bit vector */ +struct bitvec { + unsigned int cur_bit; /*!< cursor to the next unused bit */ + unsigned int data_len; /*!< length of data array in bytes */ + uint8_t *data; /*!< pointer to data array */ +}; + +enum bit_value bitvec_get_bit_pos(const struct bitvec *bv, unsigned int bitnr); +enum bit_value bitvec_get_bit_pos_high(const struct bitvec *bv, + unsigned int bitnr); +unsigned int bitvec_get_nth_set_bit(const struct bitvec *bv, unsigned int n); +int bitvec_set_bit_pos(struct bitvec *bv, unsigned int bitnum, + enum bit_value bit); +int bitvec_set_bit(struct bitvec *bv, enum bit_value bit); +int bitvec_get_bit_high(struct bitvec *bv); +int bitvec_set_bits(struct bitvec *bv, const enum bit_value *bits, unsigned int count); +int bitvec_set_u64(struct bitvec *bv, uint64_t v, uint8_t num_bits, bool use_lh); +int bitvec_set_uint(struct bitvec *bv, unsigned int in, unsigned int count); +int bitvec_get_uint(struct bitvec *bv, unsigned int num_bits); +int bitvec_find_bit_pos(const struct bitvec *bv, unsigned int n, enum bit_value val); +int bitvec_spare_padding(struct bitvec *bv, unsigned int up_to_bit); +int bitvec_get_bytes(struct bitvec *bv, uint8_t *bytes, unsigned int count); +int bitvec_set_bytes(struct bitvec *bv, const uint8_t *bytes, unsigned int count); +/*struct bitvec *bitvec_alloc(unsigned int size, TALLOC_CTX *bvctx);*/ +/*void bitvec_free(struct bitvec *bv);*/ +int bitvec_unhex(struct bitvec *bv, const char *src); +unsigned int bitvec_pack(const struct bitvec *bv, uint8_t *buffer); +unsigned int bitvec_unpack(struct bitvec *bv, const uint8_t *buffer); +uint64_t bitvec_read_field(struct bitvec *bv, unsigned int *read_index, unsigned int len); +int bitvec_write_field(struct bitvec *bv, unsigned int *write_index, uint64_t val, unsigned int len); +int bitvec_fill(struct bitvec *bv, unsigned int num_bits, enum bit_value fill); +char bit_value_to_char(enum bit_value v); +void bitvec_to_string_r(const struct bitvec *bv, char *str); +void bitvec_zero(struct bitvec *bv); +unsigned bitvec_rl(const struct bitvec *bv, bool b); +unsigned bitvec_rl_curbit(struct bitvec *bv, bool b, int max_bits); +void bitvec_shiftl(struct bitvec *bv, unsigned int n); +int16_t bitvec_get_int16_msb(const struct bitvec *bv, unsigned int num_bits); +unsigned int bitvec_add_array(struct bitvec *bv, const uint32_t *array, + unsigned int array_len, bool dry_run, + unsigned int num_bits); + +/*! @} */ |