#include <stdio.h>
#include <stdlib.h>
#include <assert.h>

// THIS SOLUTION IS NOT YET COMPLETE
//
// See bitwise_finished.c

unsigned char get_bits(unsigned char* buf, int start_bit, int end_bit) {
    unsigned char ch  = buf[0];
    unsigned char bits = ch << start_bit; // knock off 'start_bit' bits
    int num_bits = end_bit - start_bit + 1;
    bits = bits >> (8 - num_bits);
    return bits;
}

int main(int argc, char* argv[]) {
    unsigned char buf[256] = {255, 127, 63, 31};  // initializes to zero
    assert( get_bits(buf, 2, 6) == 32 - 1 );
    printf("%d\n", get_bits(buf, 2, 6));

    return EXIT_SUCCESS;
}
/* vim: set tabstop=4 shiftwidth=4 fileencoding=utf-8 noexpandtab: */