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Re: unicode string manipulation and file I/O

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On 04/10/23 05:28, James Kuyper wrote:
> On 10/3/23 12:37, MarioCCCP wrote:
>>
>> I have been away from C++ for too long and I am very confused
>> (particularly with the differences between wchar_t strings and unicode
>> strings, like UTF-8).
> The execution character set has a multibyte encoding that is used by
> most standard library routines that that take arguments as strings of
> [[un]signed] char. It could use UTF-8 (or even UTF-16, if CHAR_BIT >=
> 16), but it is not required to do so.
> 
> wchar_t uses a fixed-length encoding capable of encoding every supported
> character. It could have a Unicode encoding, either UTF-32, or UCS-2 if
> the set of supported characters is sufficiently restricted, but it is
> not required to.
> 
> The C++ standard incorporates by reference functions for converting
> between those encodings:
> The <cwchar> header declares routines for converting between wchar_t and
> multi-byte strings: std::mbstowcs(), std::wcstombs(), std::wbtowc(), and
> std::wctomb(). std::wcrtomb() std::mnbrtowc(), std::mbstowcs(),
> std::wcsrtombs(). Their definitions are not in the C++ standard itself,
> but incorporated by reference from the C standard.
> 
> char8_t, char16_t, and char32_t are newer typedefs used to store strings
> in UTF-8, UTF-16, or UTF-32 format.
> 
> The <cuchar> header defines routines for converting between the
> multi-byte and any of the UTF-N encodings, with names like mbrtoc8() and
> c8rtomb() (and similarly for c16 and 32). Their definitions are also
> incorporated by reference from the C standard.
> 
> Combining those routines, you can use multi-byte strings as an
> intermediary to convert between any pair of the other encodings
> mentioned above.

tnx for the detailed compendium. I'll try to go through all 
this !
Ciao

-- 
1) Resistere, resistere, resistere.
2) Se tutti pagano le tasse, le tasse le pagano tutti
MarioCPPP

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unicode string manipulation and file I/O MarioCCCP <NoliMihiFrangereMentulam@libero.it> - 2023-10-03 18:37 +0200
  Re: unicode string manipulation and file I/O Bonita Montero <Bonita.Montero@gmail.com> - 2023-10-03 18:40 +0200
    Re: unicode string manipulation and file I/O MarioCCCP <NoliMihiFrangereMentulam@libero.it> - 2023-10-03 20:14 +0200
  Re: unicode string manipulation and file I/O James Kuyper <jameskuyper@alumni.caltech.edu> - 2023-10-03 23:28 -0400
    Re: unicode string manipulation and file I/O MarioCCCP <NoliMihiFrangereMentulam@libero.it> - 2023-10-04 18:24 +0200

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