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  1. #include <codecvt>
  2. #include <iostream>
  3. #include <locale>
  4. int main()
  5. {
  6.     char utf8[4] = {'\xf0','\x9d','\x84','\x8b'}; // Segno, U+1d10b
  7.     const char* utf8_next;
  8.  
  9.     // the UTF-8 to UTF-16
  10.     std::mbstate_t state16;
  11.     char16_t utf16[2];
  12.     char16_t* utf16_next;
  13.     auto& f1 = std::use_facet<std::codecvt<char16_t, char, std::mbstate_t>>(std::locale::classic());
  14.     // <codecvt> alternative: std::codecvt_utf8_utf16<char16_t> f1;
  15.     f1.in(state16, utf8,  utf8+4,  utf8_next, utf16, utf16+2, utf16_next);
  16.     std::cout << "UTF16 conversion: processed " << (utf8_next - utf8) << " UTF-8 bytes\n";
  17.     for(char16_t* p = utf16; p != utf16_next; ++p)
  18.             std::cout << std::hex << std::showbase << *p << '\n';
  19.  
  20.     // UTF-8 to UTF-32
  21.     std::mbstate_t state32;
  22.     char32_t utf32[1];
  23.     char32_t* utf32_next;
  24.     auto& f2 = std::use_facet<std::codecvt<char32_t, char, std::mbstate_t>>(std::locale::classic());
  25.     // <codecvt> alternative: std::codecvt_utf8<char32_t> f2;
  26.     f2.in(state32, utf8,  utf8+4,  utf8_next, utf32, utf32+1, utf32_next);
  27.     std::cout << "UTF32 conversion: processed " << std::dec << (utf8_next - utf8) << " UTF-8 bytes\n";
  28.     for(char32_t* p = utf32; p != utf32_next; ++p)
  29.             std::cout << std::hex << std::showbase << *p << '\n';
  30. }
  31.  
Success #stdin #stdout 0.01s 5280KB
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stdin
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Standard input is empty
stdout
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UTF16 conversion: processed 4 UTF-8 bytes
0xd834
0xdd0b
UTF32 conversion: processed 4 UTF-8 bytes
0x1d10b
https://ideone.com/RgMmkV
language:
C++14 (gcc 8.3)
created:
45 days ago
visibility:
public

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