106 lines
2.9 KiB
C++
106 lines
2.9 KiB
C++
#pragma once
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#include <string>
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#include <array>
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#include <cstdarg>
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#include <utility>
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namespace XorCompileTime
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{
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constexpr auto time = __TIME__;
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constexpr auto seed = static_cast<int>(time[7]) + static_cast<int>(time[6]) * 10 + static_cast<int>(time[4]) * 60 + static_cast<int>(time[3]) * 600 + static_cast<int>(time[1]) * 3600 + static_cast<int>(time[0]) * 36000;
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template < int iValue >
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struct RandomGenerator
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{
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private:
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static constexpr unsigned a = 16807;
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static constexpr unsigned m = 0x7FFFFFFF;
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static constexpr unsigned s = RandomGenerator<iValue - 1>::value;
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static constexpr unsigned lo = a * (s & 0xFFFF);
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static constexpr unsigned hi = a * (s >> 16);
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static constexpr unsigned lo2 = lo + ((hi & 0x7FFF) << 16);
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static constexpr unsigned hi2 = hi >> 15;
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static constexpr unsigned lo3 = lo2 + hi;
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public:
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static constexpr unsigned max = m;
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static constexpr unsigned value = lo3 > m ? lo3 - m : lo3;
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};
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template <>
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struct RandomGenerator<0>
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{
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static constexpr unsigned value = seed;
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};
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template < int N, int M >
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struct RandomInt
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{
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static constexpr auto value = RandomGenerator< N + 1 >::value % M;
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};
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template < int N >
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struct RandomChar
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{
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static const char value = static_cast<char>(1 + RandomInt< N, 0x7F - 1 >::value);
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};
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template < int N >
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struct RandomCharW
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{
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static const wchar_t value = static_cast<wchar_t>(1 + RandomInt< N, 0x7F - 1 >::value);
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};
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template <size_t N, int K>
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struct XorString
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{
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private:
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const char _key;
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std::array< char, N + 1 > _encrypted;
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constexpr char enc(char c) const { return c ^ _key; }
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char dec(char c) const { return c ^ _key; }
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public:
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template <size_t... Is>
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constexpr __forceinline XorString(const char* str, std::index_sequence< Is... >) : _key(RandomChar< K >::value), _encrypted{ enc(str[Is])... } {}
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__forceinline decltype(auto) decrypt(void)
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{
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for (size_t i = 0; i < N; ++i)
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{
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_encrypted[i] = dec(_encrypted[i]);
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}
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_encrypted[N] = '\0';
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return _encrypted.data();
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}
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};
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template <size_t N, int K>
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struct XorStringW
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{
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private:
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const wchar_t _key;
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std::array< wchar_t, N + 1 > _encrypted;
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constexpr wchar_t enc(wchar_t c) const { return c ^ _key; }
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wchar_t dec(wchar_t c) const { return c ^ _key; }
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public:
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template <size_t... Is>
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constexpr __forceinline XorStringW(const wchar_t* str, std::index_sequence< Is... >) : _key(RandomCharW< K >::value), _encrypted{ enc(str[Is])... } {}
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__forceinline decltype(auto) decrypt(void)
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{
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for (size_t i = 0; i < N; ++i)
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{
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_encrypted[i] = dec(_encrypted[i]);
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}
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_encrypted[N] = '\0';
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return _encrypted.data();
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}
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};
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#define XOR_STRING_A(s) (XorCompileTime::XorString<sizeof( s ) - 1,__COUNTER__>(s, std::make_index_sequence<sizeof(s) - 1>()).decrypt())
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#define XOR_STRING_W(s) (XorCompileTime::XorStringW<sizeof( s ) - 1,__COUNTER__>(s, std::make_index_sequence<sizeof(s) - 1>()).decrypt())
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#define XorStr(s) XOR_STRING_A(s)
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} |