4 /* bit vector utility routines */
6 /* (C) 2009 by Harald Welte <laforge@gnumonks.org>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License along
21 * with this program; if not, write to the Free Software Foundation, Inc.,
22 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
27 /* In GSM mac blocks, every bit can be 0 or 1, or L or H. L/H are
28 * defined relative to the 0x2b padding pattern */
37 unsigned int cur_bit; /* curser to the next unused bit */
38 unsigned int data_len; /* length of data array in bytes */
39 uint8_t *data; /* pointer to data array */
42 /* check if the bit is 0 or 1 for a given position inside a bitvec */
43 enum bit_value bitvec_get_bit_pos(const struct bitvec *bv, unsigned int bitnr);
45 /* check if the bit is L or H for a given position inside a bitvec */
46 enum bit_value bitvec_get_bit_pos_high(const struct bitvec *bv,
49 /* get the Nth set bit inside the bit vector */
50 unsigned int bitvec_get_nth_set_bit(const struct bitvec *bv, unsigned int n);
52 /* Set a bit at given position */
53 int bitvec_set_bit_pos(struct bitvec *bv, unsigned int bitnum,
56 /* Set the next bit in the vector */
57 int bitvec_set_bit(struct bitvec *bv, enum bit_value bit);
59 /* get the next bit (low/high) inside a bitvec */
60 int bitvec_get_bit_high(struct bitvec *bv);
62 /* Set multiple bits at the current position */
63 int bitvec_set_bits(struct bitvec *bv, enum bit_value *bits, int count);
65 /* Add an unsigned integer (of length count bits) to current position */
66 int bitvec_set_uint(struct bitvec *bv, unsigned int in, int count);
68 /* get multiple bits (based on numeric value) from current pos */
69 int bitvec_get_uint(struct bitvec *bv, int num_bits);
71 /* find the first bit set in bit vector */
72 int bitvec_find_bit_pos(const struct bitvec *bv, unsigned int n, enum bit_value val);
74 /* Pad the bit vector up to a certain bit position */
75 int bitvec_spare_padding(struct bitvec *bv, unsigned int up_to_bit);
77 #endif /* _BITVEC_H */