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#include <stdint.h>
#include "flip_bits.h"
static uint8_t flip_table[256];
void init_flip_bits(void)
{
int i,k;
for (i = 0 ; i < 256 ; i++) {
uint8_t sample = 0 ;
for (k = 0; k<8; k++) {
if ( i & 1 << k ) sample |= 0x80 >> k;
}
flip_table[i] = sample;
}
}
uint8_t *flip_buf_bits(uint8_t *buf, int len)
{
int i;
uint8_t *start = buf;
for (i = 0 ; i < len; i++) {
buf[i] = flip_table[(uint8_t)buf[i]];
}
return start;
}
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