PACKFILE_VTABLE(3)

💖 PACKFILE_VTABLE(3) 💖

okay so bestie, this one's from the Allegro manual — the Allegro game programming library, and it's literally the blueprint for making your very own packfiles. buckle up 🎀

✨ SYNOPSIS ✨

#include <allegro.h>

typedef struct PACKFILE_VTABLE

🦋 DESCRIPTION 🦋

here's the whole vibe — this is the vtable you gotta hand over for custom packfiles, which then get to read from and write to wherever you want, no cap (like, say, files chillin' in memory 🧠✨). and the struct is made of these little function slots, exactly like this:

int pf_fclose(void *userdata);
int pf_getc(void *userdata);
int pf_ungetc(int c, void *userdata);
long pf_fread(void *p, long n, void *userdata);
int pf_putc(int c, void *userdata);
long pf_fwrite(const void *p, long n, void *userdata);
int pf_fseek(void *userdata, int offset);
int pf_feof(void *userdata);
int pf_ferror(void *userdata);

now the part that matters, bestie, listen up 👑 — you should provide all the entries of the vtable, even if they're just empty stubs doing absolutely nothing. not me being dramatic, it's genuinely to avoid Allegro (or you, bestie, you 😭) calling a NULL method at some point. and that would be giving crash energy. we don't want that. 💀

fr fr: fill in every slot. empty stub > NULL method every single time.

🌈 SEE ALSO 🌈

• pack_fopen_vtable(3)
• expackf(3)

and that's the whole thing, mwah 💅 — this was Allegro, version 4.4.3, dated on the PACKFILE_VTABLE(3) page. slay, go build something iconic 🫶✨