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Diffstat (limited to 'internal_rewrite/strings.hpp')
| -rw-r--r-- | internal_rewrite/strings.hpp | 162 |
1 files changed, 0 insertions, 162 deletions
diff --git a/internal_rewrite/strings.hpp b/internal_rewrite/strings.hpp deleted file mode 100644 index f34c082..0000000 --- a/internal_rewrite/strings.hpp +++ /dev/null @@ -1,162 +0,0 @@ -//-------------------------------------------------------------------------------- -//-- XorCompileTime.hpp -// -// Author: frk -// Date: 12.12.2015 -// -//-------------------------------------------------------------------------------- - -#pragma once -#include <string> -#include <array> -#include <cstdarg> - -#define BEGIN_NAMESPACE( x ) namespace x { -#define END_NAMESPACE } - -BEGIN_NAMESPACE( strenc ) - -constexpr auto time = __TIME__; -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; - -// 1988, Stephen Park and Keith Miller -// "Random Number Generators: Good Ones Are Hard To Find", considered as "minimal standard" -// Park-Miller 31 bit pseudo-random number generator, implemented with G. Carta's optimisation: -// with 32-bit math and without division - -template < int N > -struct RandomGenerator { -private: - static constexpr unsigned a = 16807; // 7^5 - static constexpr unsigned m = 2147483647; // 2^31 - 1 - - static constexpr unsigned s = RandomGenerator< N - 1 >::value; - static constexpr unsigned lo = a * ( s & 0xFFFF ); // Multiply lower 16 bits by 16807 - static constexpr unsigned hi = a * ( s >> 16 ); // Multiply higher 16 bits by 16807 - static constexpr unsigned lo2 = lo + ( ( hi & 0x7FFF ) << 16 ); // Combine lower 15 bits of hi with lo's upper bits - static constexpr unsigned hi2 = hi >> 15; // Discard lower 15 bits of hi - static constexpr unsigned lo3 = lo2 + hi; - -public: - static constexpr unsigned max = m; - static constexpr unsigned value = lo3 > m ? lo3 - m : lo3; -}; - -template <> -struct RandomGenerator< 0 > { - static constexpr unsigned value = seed; -}; - -template < int N, int M > -struct RandomInt { - static constexpr auto value = RandomGenerator< N + 1 >::value % M; -}; - -template < int N > -struct RandomChar { - static const char value = static_cast< char >( 1 + RandomInt< N, 0x7F - 1 >::value ); -}; - -template < size_t N, int K > -struct XorString { -private: - const char _key; - std::array< char, N + 1 > _encrypted; - bool decrypted = false; - - constexpr char enc( char c ) const { - return c ^ _key; - } - - char dec( char c ) const { - return c ^ _key; - } - -public: - template < size_t... Is > - constexpr __forceinline XorString( const char* const str, std::index_sequence< Is... > ) : _key( RandomChar< K >::value ), _encrypted{ enc( str[ Is ] )... } { - } - - __forceinline const char* decrypt( void ) { - if( !decrypted ) { - for( size_t i = 0; i < N; ++i ) { - _encrypted[ i ] = dec( _encrypted[ i ] ); - } - _encrypted[ N ] = '\0'; - decrypted = true; - } - printf( "N: %u K: %d str: %s address: %08x\n", N, K, _encrypted.data( ), _encrypted.data( ) ); - - return _encrypted.data( ); - } -}; - -//-------------------------------------------------------------------------------- -//-- Note: XorStr will __NOT__ work directly with functions like printf. -// To work with them you need a wrapper function that takes a const char* -// as parameter and passes it to printf and alike. -// -// The Microsoft Compiler/Linker is not working correctly with variadic -// templates! -// -// Use the functions below or use std::cout (and similar)! -//-------------------------------------------------------------------------------- - -static auto w_printf = [ ]( const char* fmt, ... ) { - va_list args; - va_start( args, fmt ); - vprintf_s( fmt, args ); - va_end( args ); -}; - -static auto w_printf_s = [ ]( const char* fmt, ... ) { - va_list args; - va_start( args, fmt ); - vprintf_s( fmt, args ); - va_end( args ); -}; - -static auto w_sprintf = [ ]( char* buf, const char* fmt, ... ) { - va_list args; - va_start( args, fmt ); - vsprintf( buf, fmt, args ); - va_end( args ); -}; - -static auto w_sprintf_s = [ ]( char* buf, size_t buf_size, const char* fmt, ... ) { - va_list args; - va_start( args, fmt ); - vsprintf_s( buf, buf_size, fmt, args ); - va_end( args ); -}; - -//for compatibility with debug mode -struct debug_ret { -private: - const char* ret; - -public: - debug_ret( const char* str ) : ret( str ) { }; - - auto decrypt( ) { - return ret; - } -}; - -constexpr size_t strlen_ct( const char* const str ) { - size_t out = 1; - - for( ; str[ out ] != '\0'; ++out ); - - return out; -} - -#if 0 -#define xors_raw( s ) ( strenc::XorString< strenc::strlen_ct( s ), __COUNTER__ >( s, std::make_index_sequence< sizeof( s ) - 1>() ) ) -#define xors( s ) ( strenc::XorString< strenc::strlen_ct( s ), __COUNTER__ >( s, std::make_index_sequence< sizeof( s ) - 1>() ).decrypt() ) -#else -#define xors_raw( s ) ( [ ]{ strenc::debug_ret ret{ s }; return ret; }( ) ) -#define xors( s ) ( s ) -#endif - -END_NAMESPACE
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