66 lines
2.1 KiB
C
66 lines
2.1 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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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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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,
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ONE = 1,
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L = 2,
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H = 3,
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};
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struct bitvec {
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unsigned int cur_bit; /* curser to the next unused bit */
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unsigned int data_len; /* length of data array in bytes */
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uint8_t *data; /* pointer to data array */
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};
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/* check if the bit is 0 or 1 for a given position inside a bitvec */
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enum bit_value bitvec_get_bit_pos(struct bitvec *bv, unsigned int bitnr);
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/* get the Nth set bit inside the bit vector */
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unsigned int bitvec_get_nth_set_bit(struct bitvec *bv, unsigned int n);
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/* Set a bit at given position */
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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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/* Set the next bit in the vector */
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int bitvec_set_bit(struct bitvec *bv, enum bit_value bit);
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/* Set multiple bits at the current position */
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int bitvec_set_bits(struct bitvec *bv, enum bit_value *bits, int count);
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/* Add an unsigned integer (of length count bits) to current position */
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int bitvec_set_uint(struct bitvec *bv, unsigned int in, int count);
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/* Pad the bit vector up to a certain bit position */
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int bitvec_spare_padding(struct bitvec *bv, unsigned int up_to_bit);
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#endif /* _BITVEC_H */
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