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/* 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);
}
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