63 lines
1.7 KiB
C++
63 lines
1.7 KiB
C++
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#include <cstdint>
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#include <cstring>
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#include <iostream>
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#include "dpf.hpp"
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/// `buffered_prg` is a forward cursor, one stream per value type.
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/// `at<I>(index)` reads by absolute index and does not move the cursor.
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/// `lane_table` is the seekable form: value and mask streams per role.
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int main()
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{
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//! [buffered-prg]
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dpf::randomness::aes_buffered_prg<std::uint64_t, std::uint32_t> prg(
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/*per stream*/ 64);
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std::uint64_t first = prg.get<0>();
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std::uint64_t second = prg.get<0>();
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// Absolute index 0 is `first` again. The cursor stays at 2.
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std::uint64_t replay = prg.at<0>(0);
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std::uint32_t other_stream = prg.get<1>();
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std::uint64_t batch[4];
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prg.fill<0>(batch, 4);
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//! [buffered-prg]
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if (std::memcmp(&replay, &first, sizeof(first)) != 0)
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{
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std::cerr << "buffered_prg at(0)\n";
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return 1;
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}
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if (prg.sampled<0>() != 6)
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{
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std::cerr << "buffered_prg cursor\n";
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return 1;
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}
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// Stream 1 has its own cursor.
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if (prg.sampled<1>() != 1)
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{
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std::cerr << "buffered_prg stream 1\n";
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return 1;
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}
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(void)second;
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(void)other_stream;
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(void)batch;
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//! [lane-table]
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dpf::randomness::lane_table<std::uint64_t> lanes(/*window*/ 32);
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// Order does not matter. Masks are a separate stream from values.
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auto v_late = lanes.value_at(/*role*/ 3, /*index*/ 10);
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auto v_early = lanes.value_at(3, 10);
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auto mask = lanes.mask_at(3, 10);
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//! [lane-table]
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if (std::memcmp(&v_late, &v_early, sizeof(v_late)) != 0)
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{
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std::cerr << "lane_table replay\n";
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return 1;
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}
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(void)mask;
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std::cout << "ok\n";
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return 0;
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}
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