bitstream.h

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#pragma once
#include <stdint.h>
 
struct BitStream {
    uint8_t *base; 
    template<typename T>
    T range(int start, int end) {
        T dest{};
        int len = end-start;
        int i = 1;
        while (start < end) {
            dest |= (base[start/8] & 0x80>>start%8) >> (7 - start%8) << (len - i);
            ++start;
            ++i;
        }
        return dest;
    }
};