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  1. 	std::wstring widen(std::string const& src)
  2. 	{	
  3. 		typedef std::codecvt<wchar_t, char, std::mbstate_t> convert;
  4.  
  5. 		const convert& cvt = std::use_facet<convert>(std::locale(""));
  6. 		convert::result res;
  7. 		std::mbstate_t state;
  8.  
  9. 		const char *src_next = 0;
  10. 		wchar_t *wcs = new wchar_t[src.length() + 1];
  11. 		wchar_t *wcs_next = 0;
  12. 		std::wstring ret;
  13.  
  14. 		res = cvt.in(state, src.data(), src.data() + src.size(), src_next, 
  15. 				wcs, wcs + sizeof(wchar_t) * (src.length() + 1), wcs_next
  16. 		);
  17.  
  18. 		// big endian
  19. 		if (res == convert::ok) {
  20. 			std::wstring ret(wcs, wcs_next);
  21.  
  22. 			for (auto it = ret.begin(), end = ret.end(); it != end; ++it) {
  23. 				std::reverse(reinterpret_cast<unsigned wchar_t>(*it), sizeof(unsigned wchar_t));
  24. 			}
  25. 			return ret;
  26. 		}
  27.  
  28.  
  29. 		// fail
  30. 		return std::wstring();
  31. 	}
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https://ideone.com/ynXmn
language:
C++ (gcc 8.3)
created:
13 years ago
visibility:
secret

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