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Diffstat (limited to 'include/osmocom/gapk/utils.h')
-rw-r--r-- | include/osmocom/gapk/utils.h | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/include/osmocom/gapk/utils.h b/include/osmocom/gapk/utils.h new file mode 100644 index 0000000..0b8b75b --- /dev/null +++ b/include/osmocom/gapk/utils.h @@ -0,0 +1,101 @@ +/* Various helpers */ + +/* + * This file is part of gapk (GSM Audio Pocket Knife). + * + * gapk 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 3 of the License, or + * (at your option) any later version. + * + * gapk 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 gapk. If not, see <http://www.gnu.org/licenses/>. + */ + +#pragma once + +#include <stdint.h> + +static inline int +msb_get_bit(const uint8_t *buf, int bn) +{ + int pos_byte = bn >> 3; + int pos_bit = 7 - (bn & 7); + + return (buf[pos_byte] >> pos_bit) & 1; +} + +static inline void +msb_put_bit(uint8_t *buf, int bn, int bit) +{ + int pos_byte = bn >> 3; + int pos_bit = 7 - (bn & 7); + + if (bit) + buf[pos_byte] |= (1 << pos_bit); + else + buf[pos_byte] &= ~(1 << pos_bit); +} + +static inline void +msb_set_bit(uint8_t *buf, int bn) +{ + int pos_byte = bn >> 3; + int pos_bit = 7 - (bn & 7); + + buf[pos_byte] |= (1 << pos_bit); +} + +static inline void +msb_clr_bit(uint8_t *buf, int bn) +{ + int pos_byte = bn >> 3; + int pos_bit = 7 - (bn & 7); + + buf[pos_byte] &= ~(1 << pos_bit); +} + + +static inline int +lsb_get_bit(const uint8_t *buf, int bn) +{ + int pos_byte = bn >> 3; + int pos_bit = bn & 7; + + return (buf[pos_byte] >> pos_bit) & 1; +} + +static inline void +lsb_put_bit(uint8_t *buf, int bn, int bit) +{ + int pos_byte = bn >> 3; + int pos_bit = bn & 7; + + if (bit) + buf[pos_byte] |= (1 << pos_bit); + else + buf[pos_byte] &= ~(1 << pos_bit); +} + +static inline void +lsb_set_bit(uint8_t *buf, int bn) +{ + int pos_byte = bn >> 3; + int pos_bit = bn & 7; + + buf[pos_byte] |= (1 << pos_bit); +} + +static inline void +lsb_clr_bit(uint8_t *buf, int bn) +{ + int pos_byte = bn >> 3; + int pos_bit = bn & 7; + + buf[pos_byte] &= ~(1 << pos_bit); +} |