I am trying to create a new file with name "履歴書.txt" using C language's fopen(). I am using Windows 10 English version.
File gets created but file name is always garbled.
How can I create file with exact name "履歴書.txt" in C language?Code:setlocale(LC_ALL, "ja_JP.utf8"); FILE *outputfile; outputfile = fopen("C:/sources/履歴書.txt", "w, ccs=UTF-8"); if (outputfile == NULL) { printf("cannot open\n"); exit(1); } fprintf(outputfile, "this is test.\n"); fclose(outputfile);
Originally Posted by Mithlesh10
C's fopen takes a char *. This is a sequence of 8-bit bytes designed to hold Latin characters. You might be able to pass it UTF-8, which encodes ASCII as 8 bits and Japanese as multibytes, but it probably won't work.
So you will have to use a function with a name like _wfopen(), which takes wide characters (16 bit).
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Thanks for your reply.
I think I should have mentioned it while asking question, but to keep it simple I didn't.
FYI, _wfopen() also doesn't work. I have already tried like this :
Code:_wfopen(L"C:/sources/履歴書.txt", L"w,ccs=UTF-8");
ISO 9899 accepts limited sets of multibyte charsets like UNICODE, as defined in Annex D of the standard. Including using multibyte charset with identifiers (thou some compilers don't respect this - clang and GCC 10 does! But not GCC 9 or below and maybe not Visual Studio's C++).
It works just fine:You might be able to pass it UTF-8, which encodes ASCII as 8 bits and Japanese as multibytes, but it probably won't work.
Mithiesh10 problem is because Windows has 2 charsets: One for single byte chars (Windows 1252?), other for multibyte chars (UTF-16 or WideChar), it doesn't recognize UTF-8. This is limitatio of Windows, not C.
In that aspect you are right: For Windows you must use wchar_t and w* functions to use UNICODE. But again, it is not a limitation of C.
Last edited by flp1969; 10-19-2020 at 06:37 AM.
Here worked fine. The problem, it seems, is the Windows terminal don't recognize UNICODE:
Attachment 16219
Didn't get your attachment. Please reattach or share code.
Sorry... it is not a code, but an image of file explorer, showing the name correctly.
I'am getting ???.txt on terminal, but on file explorer is correct.
The test code is simply:
Code:if ( ! ( f = _wfopen( L"履歴書.txt", L"w,ccs=UTF-8" ) ) ) { perror( "_wfopen" ); exit(1); } fclose( f );
Thanks for the code. I also have exact same code and it runs fine. But file created has garbled name. To be precise it becomes - å±¥æ..´æ›¸.txt
Which compiler are you using?
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
If you are willing for a somewhat hacky solution, try this:
Code:#include <stdio.h> int main(int argc, char *argv[]) { // UTF-8 coding for unicode filename char filename[] = {0xe5, 0xb1, 0xa5, 0xe6, 0xad, 0xb4, 0xe6, 0x9b, 0xb8, '.', 't', 'x', 't', 0 }; FILE *f = fopen(filename,"wb"); if(f) fclose(f); }
Unfortunately, this doesn't work on Windows. Here's the same code, using fopen() (test.exe) and _wfopen() (test2.exe). Notice that in file explorer the created flie is shown with the "correct" name when using _wfopen(), but in the terminal is ???.txt. And, when using fopen() the individual bytes of UTF-8 chars ara used as if they were in Windows-1252 codepage (the '.txt' portion isn't there because file explorer hides the extension, by default):
PS: On Windows you need encode your source code in UTF16LE if using multibyte charsets.
Last edited by flp1969; 10-20-2020 at 06:26 AM.
