pack_fopen_vtable (3) - Linux Manuals
pack_fopen_vtable: Allegro game programming library.
NAME
pack_fopen_vtable - Allegro game programming library.SYNOPSIS
#include <allegro.h>
PACKFILE *pack_fopen_vtable(const PACKFILE_VTABLE *vtable, void *userdata);
DESCRIPTION
Creates a new packfile structure that uses the functions specified in the vtable instead of the standard functions. The data pointer by `vtable' and `userdata' must remain available for the lifetime of the created packfile.While the created packfile structure can be used with other Allegro functions, there are two limitations. First, opening chunks using pack_fopen_chunk() on top of the returned packfile is not possible at this time. And packfile_password() does not have any effect on packfiles opened with pack_fopen_vtable().