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https://github.com/revsic/cpp-obfuscator
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revsic
26 lines
715 B
C++
26 lines
715 B
C++
#include <obfs/random.hpp>
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#include <catch2/catch.hpp>
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using uint64_t = unsigned long long;
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// https://en.wikipedia.org/wiki/Xorshift
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uint64_t xorshift128plus(uint64_t state[2]) {
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uint64_t t = state[0];
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uint64_t const s = state[1];
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state[0] = s;
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t ^= t << 23; // a
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t ^= t >> 17; // b
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t ^= s ^ (s >> 26); // c
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state[1] = t;
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return t + s;
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}
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TEST_CASE("Random case", "[obfs::Xorshift+]") {
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constexpr size_t val = MAKE_RAND_VAL(100);
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uint64_t state[2] = { val, val << 1 };
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REQUIRE(obfs::Xorshiftplus<val, 1>::value == xorshift128plus(state));
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REQUIRE(obfs::Xorshiftplus<val, 2>::value == xorshift128plus(state));
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REQUIRE(obfs::Xorshiftplus<val, 3>::value == xorshift128plus(state));
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}
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