pack_fseek(3)

💖 pack_fseek(3) — the Allegro manual, but make it cute 💖

okay bestie, we're diving into the Allegro game programming library, and this little function is called pack_fseek. It's a section 3 manpage situation, so pull up a chair and let's go 🫶

✨ SYNOPSIS ✨

#include <allegro.h>

int pack_fseek(PACKFILE *f, int offset);

🌸 DESCRIPTION 🌸

So basically? pack_fseek moves the position indicator of the stream f. That's it. That's the whole vibe. 💅

But here's the tea, and it's important tea: unlike the standard fseek() function, this one only supports forward movements relative to the current position, and only in read-only streams. So do not come in here with negative offsets, okay? Not the move. 🙈

Also, real talk: seeking is very slow when you're reading compressed files. Like, painfully slow. So you should avoid it unless you are sure that the file is not compressed. No cap. 🔥

Here's an example, iconic behavior honestly:

input_file = pack_fopen("data.bin", "r");
if (!input_file)
   abort_on_error("Couldn't open binary data!");
/* Skip some useless header before reading data. */
pack_fseek(input_file, 32);

⭐ RETURN VALUE ⭐

Returns zero on success, or a negative number on error — and when it errors, it stores the error code in errno. So check that errno, bestie, she's trying to tell you something. 😭

🎀 SEE ALSO 🎀

• pack_fopen(3)
• pack_fopen_chunk(3)
• expackf(3)

💀 reminder reminder: forward only, read-only streams only, no negative offsets, and compressed-file seeking is slow slow slow. periodt.

okay that's the whole page, you ate that 🧚✨ this was the Allegro manual, version 4.4.3 — mwah, love you, go write some games 💖🎀🦋