Knyffen
c6b6329134
The process contains the fingerprinting function along with a queue representing the sliding window. This means that the user no longer needs to remember the outgoing character when streaming the text.
30 lines
758 B
C++
30 lines
758 B
C++
#include "processes.hpp"
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Rabin_fingerprint_process::Rabin_fingerprint_process(uint32_t irr_poly, size_t window_size_in_bits)
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: window_size_in_bits(window_size_in_bits),
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phi(irr_poly, window_size_in_bits)
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{}
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void Rabin_fingerprint_process::stream_char (char c) {
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std::bitset<8> b(c);
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for (char i = 7; i >= 0; i--) {
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stream_bit((bool)b[i]);
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}
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}
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void Rabin_fingerprint_process::stream_bit (bool b) {
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if (window.size() == window_size_in_bits) {
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window.push(b);
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bool b_out = window.front();
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window.pop();
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phi.slide_bit(b, b_out);
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} else {
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window.push(b);
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phi.push_bit(b);
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}
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}
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uint32_t Rabin_fingerprint_process::get_fingerprint () {
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return phi.get_fingerprint();
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}
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