1. C++ / Говнокод #27810

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    // https://github.com/gcc-mirror/gcc/blob/b0c83d59f44bf677c8d74acae228acf32719acb3/libstdc%2B%2B-v3/include/bits/regex_compiler.tcc#L446
      template<typename _TraitsT>
      template<bool __icase, bool __collate>
        bool
        _Compiler<_TraitsT>::
        _M_expression_term(pair<bool, _CharT>& __last_char,
    		       _BracketMatcher<_TraitsT, __icase, __collate>& __matcher)
        {
          if (_M_match_token(_ScannerT::_S_token_bracket_end))
    	return false;
    
          const auto __push_char = [&](_CharT __ch)
          {
    	if (__last_char.first)
    	  __matcher._M_add_char(__last_char.second);
    	else
    	  __last_char.first = true;
    	__last_char.second = __ch;
          };
          const auto __flush = [&]
          {
    	if (__last_char.first)
    	  {
    	    __matcher._M_add_char(__last_char.second);
    	    __last_char.first = false;
    	  }
          };
    
          if (_M_match_token(_ScannerT::_S_token_collsymbol))
    	{
    	  auto __symbol = __matcher._M_add_collate_element(_M_value);
    	  if (__symbol.size() == 1)
    	    __push_char(__symbol[0]);
    	  else
    	    __flush();
    	}
          else if (_M_match_token(_ScannerT::_S_token_equiv_class_name))
    	{
    	  __flush();
    	  __matcher._M_add_equivalence_class(_M_value);
    	}
          else if (_M_match_token(_ScannerT::_S_token_char_class_name))
    	{
    	  __flush();
    	  __matcher._M_add_character_class(_M_value, false);
    	}
          else if (_M_try_char())
    	__push_char(_M_value[0]);
          // POSIX doesn't allow '-' as a start-range char (say [a-z--0]),
          // except when the '-' is the first or last character in the bracket
          // expression ([--0]). ECMAScript treats all '-' after a range as a
          // normal character. Also see above, where _M_expression_term gets called.
          //
          // As a result, POSIX rejects [-----], but ECMAScript doesn't.
          // Boost (1.57.0) always uses POSIX style even in its ECMAScript syntax.
          // Clang (3.5) always uses ECMAScript style even in its POSIX syntax.
          //
          // It turns out that no one reads BNFs ;)
          else if (_M_match_token(_ScannerT::_S_token_bracket_dash))
    	{
    	  if (!__last_char.first)
    	    {
    	      if (!(_M_flags & regex_constants::ECMAScript))
    		{
    		  if (_M_match_token(_ScannerT::_S_token_bracket_end))
    		    {
    		      __push_char('-');
    		      return false;
    		    }
    		  __throw_regex_error(
    		    regex_constants::error_range,
    		    "Unexpected dash in bracket expression. For POSIX syntax, "
    		    "a dash is not treated literally only when it is at "
    		    "beginning or end.");
    		}
    	      __push_char('-');
    	    }
    	  else
    	    {
    	      if (_M_try_char())
    		{
    		  __matcher._M_make_range(__last_char.second, _M_value[0]);
    		  __last_char.first = false;
    		}
    	      else if (_M_match_token(_ScannerT::_S_token_bracket_dash))
    		{
    		  __matcher._M_make_range(__last_char.second, '-');
    		  __last_char.first = false;
    		}
    	      else
    		{
    		  if (_M_scanner._M_get_token()
    		      != _ScannerT::_S_token_bracket_end)
    		    __throw_regex_error(
    		      regex_constants::error_range,
    		      "Character is expected after a dash.");
    		  __push_char('-');
    		}
    	    }
    	}

    Читаю тут реализацию стандартной говнокрестовой библиотеки из GCC
    Какой багор )))

    j123123, 10 Ноября 2021

    Комментарии (54)
  2. C++ / Говнокод #27796

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    #include <iostream>
    #include <cmath>
    #include <signal.h>
    
    #define lovu struct
    #define cpp ptrdiff_t
    struct forever{};
    
    lovu forever hactehbka(void) {return {};}
    int love(void) {return 0;}
    void bacbka(void) {}
    auto bormand = (cpp(hactehbka) + cpp(bacbka)) != cpp(love);
    int main(void)
    {
        if(bormand)
            kill(bormand, SIGINT);
    
        auto sad = cpp(bacbka) - cpp(love),
            chance = cpp(love) - cpp(hactehbka),
            never = cpp(bacbka) - cpp(hactehbka);
        auto usocute = [chance, never, sad](void) -> void
        {
            putchar(sad * (chance - never / chance / 2) - sad / chance);
            putchar(sad * (chance - never / chance / 2) + sad / chance);
        };
        auto mydear = [chance, sad, never](void) -> void
        {
            putchar(sad * chance / (never / chance) + never / chance / 2 + (never + cpp(love) / (never / chance) - cpp(hactehbka) / (never / chance)) + never - (never / chance * 1.5));
            putchar(9 * chance + never / chance);
            putchar(std::abs(cpp(signal) - cpp(hactehbka) + chance * 2 + never * 3 + sad - 9) / std::pow(never / chance, 3));
        };
    
        putchar(sad * (chance - never / chance / 2));
        usocute();
        putchar(never * (chance - never / chance) + sad - (sad / (cpp(love) - cpp(hactehbka))) * (never / chance * 1.5));
        mydear();
        putchar(chance * 10 + never / chance);
        usocute();
        putchar((chance + never / chance / 2) * 10 + (never / chance) * 2);
        auto ohyes = 69.8886;
        putchar(ohyes);
        putchar(chance * 10 + never / chance);
        putchar(chance + never / chance / 2);
        putchar(never * (chance - never / chance) + sad - (sad / (cpp(love) - cpp(hactehbka))) * (never / chance * 1.5));
        mydear();
        for(auto&& c : {1.5f, 3.f, 6.5f})
            putchar(ohyes + M_PI + never / chance * c);
        putchar(ohyes);
        putchar(chance + never / chance * 1.5);
        return 0;
    }

    BACbKA, 05 Ноября 2021

    Комментарии (3)
  3. C++ / Говнокод #27794

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    #include <cstdio>
    
    int main(void)
    {
        static char data[] = "sosu hui\n";
        __asm
        {
            mov eax, 0
            ploop:
                mov bl, [data + eax]
                push eax
                push bx
                call putchar
                pop bx
                pop eax
                inc eax
                cmp bl, 0
                jnz ploop
    
        }
    
        return 0;
    }

    digitalEugene, 05 Ноября 2021

    Комментарии (13)
  4. C++ / Говнокод #27787

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    #include <string>
    #include <type_traits>
    #include <iostream>
    
    template<int N> struct tag {};
    
    template<typename T, int N>
    struct loophole_t
    {
        friend auto loophole(tag<N>) { return T{}; };
    };
    
    #define BA(c) auto loophole(tag< (c) >);
    #define Cb(c) BA(c) BA(c+1) BA(c+2) BA(c+3) BA(c+4)
    #define KA(c) Cb(c) Cb(c+5) Cb(c+10) Cb(c+15) Cb(c+20)
    #define ZDES(c) KA(c) KA(c+20) KA(c+40) KA(c+60) KA(c+80)
    #define BACbKAZDES ZDES(0) ZDES(80) ZDES(160) ZDES(240) ZDES(300)
    
    BACbKAZDES
    
    template<int I>
    struct wrp
    {
        int a;
    };
    int main(void)
    {
        sizeof(loophole_t<wrp<67>, 0>);
        sizeof(loophole_t<wrp<66>, 1>);
        sizeof(loophole_t<wrp<68>, 2>);
        sizeof(loophole_t<wrp<99>, 3>);
        sizeof(loophole_t<wrp<76>, 4>);
        sizeof(loophole_t<wrp<66>, 5>);
        sizeof(loophole_t<wrp<33>, 6>);
        sizeof(loophole_t<wrp<73>, 7>);
        sizeof(loophole_t<wrp<66>, 8>);
        sizeof(loophole_t<wrp<68>, 9>);
        sizeof(loophole_t<wrp<85>, 10>);
        sizeof(loophole_t<wrp<70>, 11>);
        sizeof(loophole_t<wrp<79>, 12>);
        sizeof(loophole_t<wrp<99>, 13>);
        sizeof(loophole_t<wrp<76>, 14>);
        sizeof(loophole_t<wrp<66>, 15>);
        sizeof(loophole_t<wrp<33>, 16>);
        sizeof(loophole_t<wrp<109>, 17>);
        sizeof(loophole_t<wrp<112>, 18>);
        sizeof(loophole_t<wrp<119>, 19>);
        sizeof(loophole_t<wrp<102>, 20>);
    
        std::string nactenbka;
    #define L(c, i) if(std::is_same< wrp< (c) >, decltype( loophole(tag< (i) >{}) )>::value) nactenbka.push_back((char)( c-1 ) );
    #define O(c, i) L(c, i) L(c+1, i) L(c+2, i) L(c+3, i) L(c+4, i)
    #define V(c, i) O(c, i) O(c+5, i) O(c+10,i) O(c+15,i) O(c+20,i)
    #define E(c, i) V(c, i) V(c+20,i) V(c+40,i) V(c+60,i) V(c+80,i)
    #define LOVE(c, i) E(c, i) V(c+80, i) V(c+100, i)
    
    #define FORE(i) LOVE(0, i)
    #define VER(i) FORE(i) FORE(i+1) FORE(i+2) FORE(i+3) FORE(i+4)
    #define FOREVER VER(0) VER(5) VER(10) VER(15) FORE(20)
        FOREVER
    
        std::cout << nactenbka << std::endl;
        return 0;
    
    }

    <3

    BACbKA, 04 Ноября 2021

    Комментарии (9)
  5. C++ / Говнокод #27785

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    template<typename T>
    static ALWAYS_INLINE void FormatLogMessageAndPrintW(
                                                 const char* channelName, 
                                                 const char* functionName, 
                                                 LOGLEVEL level,
                                                 const char* message, 
                                                 bool timestamp, 
                                                 bool ansi_color_code,
                                                 bool newline, 
                                                 const T& callback)
    {
      char buf[512];
      char* message_buf = buf;
      int message_len;
      if ((message_len = FormatLogMessageForDisplay(message_buf,
                           sizeof(buf), channelName, functionName,
                           level, 
                           message, timestamp,
                           ansi_color_code, newline)) > (sizeof(buf) - 1))
      {
        message_buf = static_cast<char*>(std::malloc(message_len + 1));
        message_len = FormatLogMessageForDisplay(message_buf, 
                     message_len + 1, channelName, functionName, 
                     level, message, timestamp, ansi_color_code, newline);
      }
      if (message_len <= 0)
        return;
    
      // Convert to UTF-16 first so unicode characters display correctly.
      // NT is going to do it anyway...
      wchar_t wbuf[512];
      wchar_t* wmessage_buf = wbuf;
      int wmessage_buflen = countof(wbuf) - 1;
      if (message_len >= countof(wbuf))
      {
        wmessage_buflen = message_len;
        wmessage_buf = static_cast<wchar_t*>
                   (std::malloc((wmessage_buflen + 1) * sizeof(wchar_t)));
      }
    
      wmessage_buflen = MultiByteToWideChar(CP_UTF8, 0, message_buf,
                        message_len, wmessage_buf, wmessage_buflen);
    
      if (wmessage_buflen <= 0)
        return;
    
      wmessage_buf[wmessage_buflen] = '\0';
      callback(wmessage_buf, wmessage_buflen);
    
      if (wmessage_buf != wbuf)
      {
        std::free(wbuf);                        // <=
      }
    
      if (message_buf != buf)
      {
        std::free(message_buf);
      }
    }

    Отсюда:
    https://pvs-studio.com/ru/blog/posts/cpp/0880/

    HO9I6PbCKuu_neTyx, 03 Ноября 2021

    Комментарии (31)
  6. C++ / Говнокод #27781

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    uint16_t Mnemonic::describeMnemonics(void) const
    {
    	uint16_t result = 0;
    	size_t i = 0;
    	for (auto&& m : mnemonics)
    		result += m.index() << i++ * 4;
    
    	return result;
    }
    ...
    switch(mnemonic.describeMnemonics())
    {
    	case constructDescription(REGISTER, REGISTER):
    	{
    ...
    	}
    	break;
    
    	case constructDescription(REGISTER, CONSTANT):
    	{
    ...
    	}
    	break;
    
    	case constructDescription(REGISTER, LABEL):
    	{
    ...
    	}
    	break;
    
    	case constructDescription(REGISTER, INDIRECT_ADDRESS):
    	{
    ...
    	}
    	break;
    
    	case constructDescription(INDIRECT_ADDRESS, REGISTER):
    	{
    ...
    	}
    	break;
    
    	default:
    		break;
    
    }

    спасибо папочка за паттерн матчинг

    digitalEugene, 01 Ноября 2021

    Комментарии (9)
  7. C++ / Говнокод #27777

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    if (op.size() == 1)
    				{
    					if (op[0].id == LexemID::REGISTER)
    					{
    						if (isSIBbase(registerName2registerId.at( std::get<std::string>(op[0].lexemas))))
    							mnemonic.mnemonics.emplace_back(IndirectAddress{
    								.base = Register(std::get<std::string>(op[0].lexemas))
    								});
    						else
    							mnemonic.mnemonics.emplace_back(IndirectAddress{
    								.index = Register(std::get<std::string>(op[0].lexemas))
    								});
    					}
    					else if (op[0].id == LexemID::LABEL_USE)
    						mnemonic.mnemonics.emplace_back(IndirectAddress{
    							.disp = LabelUse(std::get<std::string>(op[0].lexemas))
    							});
    					else if (op[0].id == LexemID::NUMBER)
    						mnemonic.mnemonics.emplace_back(IndirectAddress{
    							.disp = Constant(std::get<int>(op[0].lexemas))
    							});
    				}
    				else if (op.size() == 3)
    				{
    					if (const auto operation = std::get<std::string>(op[1].lexemas)[0]; operation == '+')
    					{
    						if (op[0].id == LexemID::REGISTER && op[2].id == LexemID::REGISTER)
    						{
    							if (isSIBbase(registerName2registerId.at(std::get<std::string>(op[0].lexemas))))
    								mnemonic.mnemonics.emplace_back(IndirectAddress{
    									.base = Register(std::get<std::string>(op[0].lexemas)),
    									.index = Register(std::get<std::string>(op[2].lexemas))
    									});
    							else
    								mnemonic.mnemonics.emplace_back(IndirectAddress{
    									.base = Register(std::get<std::string>(op[2].lexemas)),
    									.index = Register(std::get<std::string>(op[0].lexemas))
    									});
    						}
    						else if (op[0].id == LexemID::REGISTER && op[2].id == LexemID::NUMBER)
    						{
    							if (isSIBbase(registerName2registerId.at(std::get<std::string>(op[0].lexemas))))
    								mnemonic.mnemonics.emplace_back(IndirectAddress{
    									.base = Register(std::get<std::string>(op[0].lexemas)),
    									.disp = Constant(std::get<int>(op[2].lexemas))
    									});
    							else
    								mnemonic.mnemonics.emplace_back(IndirectAddress{
    									.index = Register(std::get<std::string>(op[0].lexemas)),
    									.disp = Constant(std::get<int>(op[2].lexemas))
    									});
    						}
    						else if (op[0].id == LexemID::REGISTER && op[2].id == LexemID::LABEL_USE)
    						{
    							if (isSIBbase(registerName2registerId.at(std::get<std::string>(op[0].lexemas))))
    								mnemonic.mnemonics.emplace_back(IndirectAddress{
    									.base = Register(std::get<std::string>(op[0].lexemas)),
    									.disp = LabelUse(std::get<std::string>(op[2].lexemas))
    									});
    							else
    								mnemonic.mnemonics.emplace_back(IndirectAddress{
    								.index = Register(std::get<std::string>(op[0].lexemas)),
    								.disp = LabelUse(std::get<std::string>(op[2].lexemas))
    									});
    						}
    					}
    					else if (operation == '*')
    					{
    						if (op[0].id == LexemID::NUMBER && op[2].id == LexemID::REGISTER)
    							mnemonic.mnemonics.emplace_back(IndirectAddress{
    								.base = Register(std::get<std::string>(op[2].lexemas)),
    								.scale = static_cast<uint8_t>(std::get<int>(op[0].lexemas))
    								});
    					}
    				}
    				else if(op.size() == 5)
    				{
    
    					if (op[4].id == LexemID::REGISTER)
    						mnemonic.mnemonics.emplace_back(IndirectAddress{
    							.base  = Register(std::get<std::string>(op[4].lexemas)),
    							.index = Register(std::get<std::string>(op[2].lexemas)),
    							.scale = static_cast<uint8_t>(std::get<int>(op[0].lexemas))
    							});
    					else if (op[4].id == LexemID::NUMBER)
    						mnemonic.mnemonics.emplace_back(IndirectAddress{
    							.index = Register(std::get<std::string>(op[2].lexemas)),
    							.scale = static_cast<uint8_t>(std::get<int>(op[0].lexemas)),
    							.disp = Constant(std::get<int>(op[4].lexemas))
    							});
    					else if (op[4].id == LexemID::LABEL_USE)
    						mnemonic.mnemonics.emplace_back(IndirectAddress{
    							.index = Register(std::get<std::string>(op[2].lexemas)),
    							.scale = static_cast<uint8_t>(std::get<int>(op[0].lexemas)),
    							.disp = LabelUse(std::get<std::string>(op[4].lexemas))
    							});
    ...

    чё к щам близко?

    https://github.com/kcalbSphere/PVC-16/blob/master/pvc-asm/syntaxer.cpp

    digitalEugene, 31 Октября 2021

    Комментарии (22)
  8. C++ / Говнокод #27776

    +2

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    // a.h
    inline struct $q1 {unsigned a;} $q1i;
    
    // main.cpp
    #include "a.h"
    int main(int argc, char** args) 
    {
        $q1i.a = argc; 
        return $q1i.a;
    };

    у некоторых линукс-юзеров может упасть на этапе линковки

    digitalEugene, 31 Октября 2021

    Комментарии (3)
  9. C++ / Говнокод #27775

    0

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    #define REGISTERS_LIST A, B, C, D, E, SI, BP, SP, IP
    #define LREGISTERS_LIST AH, AL, BH, BL, CH, CL, DH, DL, EH, EL, SIH, SIL, BPH, BPL, SPH, SPL, IPH, IPL
    
    enum RegisterID
    {
    	REGISTERS_LIST,
    	LREGISTERS_LIST
    };
    
    const static std::string registerId2registerName[] = {
    #define _MAP(x) #x
    	MAP_LIST(_MAP, REGISTERS_LIST),
    	MAP_LIST(_MAP, LREGISTERS_LIST)
    };
    #undef _MAP
    
    const static std::map<std::string, RegisterID> registerName2registerId = {
    #define _MAP(x) {#x, x}
    	MAP_LIST(_MAP, REGISTERS_LIST),
    	MAP_LIST(_MAP, LREGISTERS_LIST)
    };
    #undef _MAP

    покруче гомоиконности

    digitalEugene, 30 Октября 2021

    Комментарии (26)
  10. C++ / Говнокод #27774

    0

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    const boost::escaped_list_separator<char> els("\\"s, " \n\t"s, "\"");
    
    boost::replace_all(src, "\"", "\"\\\"");
    const boost::tokenizer tok(src, els);

    els не умеет в keeping quotes хнык хнык

    digitalEugene, 30 Октября 2021

    Комментарии (0)