judge the end of a file use FAT_FILESYSTEM_ELM in NCS.

[Devin Li]

Hello,

I want to judge the end of a file. In the past, I can directly call the feof() function when writing in C. Now I call the api in "fs.c & fs.h" in the example of zephyr\samples\subsys\fs\fat_fs in NCS 1.4.99-dev1, but I can't find a similar "feof" function. How should I implement this function? Is there a similar reference code in NCS?

BR,
Devin

[Edvin]

Hello,

It doesn't look like that function is part of the fs.c/h library. Perhaps you can ask on the Zephyr forum if they know how to add it, since this is part of the zephyr OS. (If I knew, I would of course let you know). 

Perhaps you can try std::feof(); Does that work?

BR,
Edvin

[Devin Li]

I changed to a way that does not use foef() api to achieve the same function, and it works normally after testing.

Basically use the following two functions:

fs_seek(&fp, 0, FS_SEEK_END);

file_total_bytes = fs_tell(&fp);

Thanks Edvin!