Special Characters in File Paths

[ajacquinot]

Hello,
I'm currently using the gpujpeg_image_load_from_file function to open images in a C++ project. However, I've encountered an issue when trying to open files that have special characters in their names, such as (((φ(◎ロ◎;)φ))).jpg.
It seems that the function uses char* for the file path parameter and relies on fopen internally, which does not handle file paths with special characters as I wish.

Is there another way to open this file, or would it be possible to update the gpujpeg_image_load_from_file function to handle file paths with special characters? (Maybe by using wide-character strings (wchar_t*) and _wfopen on Windows)

Regards,
Adrien

[MartinPulec]

Hi,

thanks for reporting. I've tried with _wfopen, file name argument converted with MultiByteToWideChar with various codepages, CP_UTF8, CP_ACP - nothing worked.

Anyways, it seems like the value in argv is already incorrect, I've tried with 'φ' ("\xcf\x86" in UTF-8) and the particular argv[x] is single byte 0x66 ('f' in ASCII). I've tried also couple of other things like passing the value of phi to the function typed directly in code to C-str with MultiByteToWideChar(CP_UTF8,... conversion and _wfopen or without it (assuming multi-byte encoding to be understood by fopen). But without a success.

Is there another way to open this file,

You can of course open the file by yourself and read the data to a byte array - gpujpeg_decoder_decode() needs just the pointer to the buffer and its length. No need to use gpujpeg_image_load_from_file.

or would it be possible to update the gpujpeg_image_load_from_file function to handle file paths with special characters

I'd like to if i knew how to. I spent some time trying but without much success. So I cannot tell if I try any further.

Anyways, if you have some expertise or idea - could you make a minimal working example (POC) showing how to open such a file? Something like:

#include <cstdio>
int main(int argc, char *argv[]) {
    wchar_t *filename;
    // code to convert argv[1] to filename
    FILE *f = _wfopen(filename, L"rb");
    if (f) {
        puts("success!");
    }
}

(The string doesn't necessarily be passe from the command-line - if you write it to the code directly, I believe it will be OK as well, passing to gpujpeg_image_load_from_file is enough for you. This could be to work-around if there is some other problem passing the string from terminal.)

I am not sure if I don't have some problem with locales. So as a starting point to check if we both have the same situation, can you try?

#include <cstdio>
#include <cstring>
int main(int argc, char *argv[]) {
    printf("%zu\n", strlen(argv[1]));
}

and call it with φ as the argument? For me, it writes 1, which should not be the case unless you have Greek 8-bit encoding (I don't believe much of non-Greek 8b encodings have mapped the Greek alphabet)