pack_fopen_vtable(3alleg4)

💖 pack_fopen_vtable — the Allegro manual, but make it slay 💖

okay bestie, welcome to the Allegro manual (that's 3alleg4 for the catalog girlies) ✨ today we're talking about pack_fopen_vtable, and honestly? it's giving custom-file-backend realness 🦋

🌸 NAME 🌸

pack_fopen_vtable — it's a function from the Allegro game programming library. iconic, we know 💅

✨ SYNOPSIS ✨

#include <allegro.h>

PACKFILE *pack_fopen_vtable(const PACKFILE_VTABLE *vtable, void
*userdata);

like, copy it exactly bestie, don't freestyle the signature 🙈

🎀 DESCRIPTION 🎀

so the tea is: this bad boy creates a brand new packfile structure that uses the functions you specified in the vtable — instead of the standard ones. main character energy, truly. 👑

now, important part, no cap: the data pointed to by vtable and userdata must remain available for the lifetime of the created packfile. like, do not let that memory ghost you. it has to stay. periodt. 💀

the created packfile structure can be used with other Allegro functions, but there are two limitations, and we're listing them because we keep every detail in this house 🫶

1. opening chunks using pack_fopen_chunk() on top of the returned packfile is not possible at this time. sorry bestie, that's just the situation.
2. packfile_password() does not have any effect on packfiles opened with pack_fopen_vtable(). zero. nada. it does not care.

🌈 RETURN VALUE 🌈

• on success: it returns a pointer to a PACKFILE structure 💖
• on error: it returns NULL and stores an error code in errno

that's it, that's the whole vibe check 😭

👑 SEE ALSO 👑

go read these next, bestie, they're all part of the lore:

• pack_fopen(3alleg4)
• pack_fopen_chunk(3alleg4)
• packfile_password(3alleg4)
• expackf(3alleg4)

and that's a wrap on pack_fopen_vtable from the Allegro manual, page pack_fopen_vtable(3alleg4) ✨ this whole thing was brought to you by Allegro version 4.4.3 — go build something cute with it, mwah 💋🌸🦋