void coeffs_to_bytes()

in pir.cpp [153:177]

• 24 lines of code
• 6 McCabe index (conditional complexity)

void coeffs_to_bytes(uint32_t limit, const Plaintext &coeffs, uint8_t *output, uint32_t size_out) {
    uint32_t room = 8;
    uint32_t j = 0;
    uint8_t *target = output;

    for (uint32_t i = 0; i < coeffs.coeff_count(); i++) {
        uint64_t src = coeffs[i];
        uint32_t rest = limit;
        while (rest && j < size_out) {
            uint32_t shift = rest;
            if (room < rest) {
                shift = room;
            }
            target[j] = target[j] << shift;
            target[j] = target[j] | (src >> (limit - shift));
            src = src << shift;
            room -= shift;
            rest -= shift;
            if (room == 0) {
                j++;
                room = 8;
            }
        }
    }
}