pack_feof(3alleg4)

💖 pack_feof 💖

okay bestie, so this is a page from the Allegro manual, and it's all about the Allegro game programming library. come sit with me, we're learning file stuff today 🎀

✨ NAME ✨

pack_feof — returns nonzero the second you hit the end of the file. it's giving "are we there yet" but for file reads. part of the Allegro game programming library, obvi 💅

🌸 SYNOPSIS 🌸

#include <allegro.h>

int pack_feof(PACKFILE *f);

like, that's it. one function, one pointer, zero drama ✨

🦋 DESCRIPTION 🦋

so what does it do? it finds out if you've reached the end of the file. simple. iconic. no cap 🫶

but here's the tea, and this is the part that makes it different from the ISO C feof() function you might already know: pack_feof() does not wait for you to attempt a read past the end of the file. it just… tells you. it knows. it's a little psychic like that 💀✨

the ISO C feof() is out here like "hmm let me see if you tried to read too far first" and pack_feof() is like "bestie i already know, we're at the end" 😌

now, the important bit — the only way to actually know whether you have read beyond the end of the file is to check the return value of the read operation you use. and ⚠️ be wary of pack_*getl(), because with those functions EOF is also a valid return value. so you can't just be like "oh it returned EOF, must be the end" — no ma'am, that could be legit data. check carefully, okay? 🥺

no cap, that pack_*getl() thing is a real gotcha. it's not a bug, it's just how those functions work, so don't get caught slipping 🙈

⭐ RETURN VALUE ⭐

• returns non-zero if you are at the end of the file 🔥
• returns zero otherwise 🌈

that's the whole vibe check. nonzero = end of file, zero = keep reading bestie 💖

👑 SEE ALSO 👑

• pack_fopen(3alleg4)
• pack_fopen_chunk(3alleg4)
• pack_ferror(3alleg4)

go read those too, they're all part of the same friend group 🫶

and that's the whole page, babes ✨ this was pack_feof from the Allegro manual, version 4.4.3. slay, go check your files, ily, mwah 💜🎀