Writing to a file in Unicode

Question

I am having some problems writing to a file in unicode inside my c program. I am trying to write a unicode Japanese string to a file. When I go to check the file though it is empty. If I try a non-unicode string it works just fine. What am I doing wrong?

setlocale(LC_CTYPE, "");
FILE* f;
f = _wfopen(COMMON_FILE_PATH,L"w");
fwprintf(f,L"日本語");
fclose(f);

Oh about my system: I am running Windows. And my IDE is Visual Studio 2008.

Answer 1

Doing the same with fopen() works for me here. I'm using Mac OS X, so I don't have _wfopen(); assuming _wfopen() isn't returning bad stuff to you, your code should work.

Edit: I tested on cygwin, too - it also seems to work fine.

Answer 2

I cannot find a reference to _wfopen on either of my boxes, I however don't see why opening it with fopen should cause a problem, all you need is a file pointer.

What matters is if or not C recognizes the internal Unicode's values and pushes those binary values to the file properly.

Try just using fopen as Carl suggested, it should work properly.

Edit: if it still doesn't work you may try defining the characters as their integer values and pushing them with fwprintf(), I know that's cumbersome and not a good fix in the long run, but it should work as well.

Answer 3

You might need to add the encoding to the mode. Possibly this:

f = _wfopen(COMMON_FILE_PATH,L"w, ccs=UTF-16LE");