Comments on: Writing UTF-8 files in C++

By: Silviu

Silviu — Fri, 22 Jan 2010 07:53:19 +0000

Sorin, if you’re using _wfopen() with css=UTF-8, you automatically add BOM chars to the file beginning. The BOM should create more disadvantages then advantages.
For instance, if you open again the same file created with the same parameters (just to change your file content) then you must be careful to remove the old BOM chars section, because otherwise you have two BOMs.
I met this situation in the past into a bug of one of my colleges and it isn’t to pretty.
I use std::ofstream class and a class conversion that contains a similarly conversion method, Marius’s sample.

By: Collation, DateTime, SParse Column and XML : Unicode References

Collation, DateTime, SParse Column and XML : Unicode References — Wed, 20 May 2009 05:01:40 +0000

[...] about UTF-8 Encoding. Then he gave a C++ code example of convert from/to UTF-16 to UTF-8. This is another example of writing UTF-8 in [...]

By: Sorin

Sorin — Sat, 09 May 2009 21:34:00 +0000

I used this in order to create UTF-8 files:
_wfopen(strFile, L”wt, ccs=UTF-8″);

Nothing else needed.

By: David Coorey

David Coorey — Tue, 17 Mar 2009 23:30:54 +0000

Thanks for this article, Marius. It was exactly what I needed to know.

I sometimes wonder how I managed to do my job before the internet was around…

By: u0m3

u0m3 — Sun, 15 Mar 2009 22:40:05 +0000

locale(“en_US.utf8″); doesn’t work in Visual Studio. For “English_United States.1252″ you must use locale(“English”) but this does not set it to UTF-8.

This method seems to work only on linux.

Mr. Marius’s example is the only working method for converting wchar_t to char UTF-8 on Windows/Visual Studio.

Ad as far as the encoding goes… Notepad seems to detect automatically the required encoding to display UTF-8 as far as I tested.

By: Torkel Bj?�rnson

Torkel Bj?�rnson — Tue, 24 Feb 2009 23:54:58 +0000

You can also do this:

wofstream file(“test”);
file.imbue(locale(“en_US.utf8″)); // can throw
file << L”this is a na??ve example” << endl;

Or if you know your default locale is UTF-8
file.imbue(locale(“”));

By: mariusbancila

mariusbancila — Tue, 17 Feb 2009 20:02:52 +0000

If it’s already UTF_8 then write it just like you’d write any other string. Use ofstream. You can see the last example in my post. Or maybe I’m missing something and didn’t understand you well.

By: Nek

Nek — Tue, 17 Feb 2009 14:04:41 +0000

If i have a string(WideChar) that contains UTF-8 character and I want to write it on a file, How do I do that?