Provided by: allegro4-doc_4.4.2-4_all bug


       PACKFILE_VTABLE   -   Packfile  vtable  structure,  for  custom  packfiles.  Allegro  game
       programming library.


       #include <allegro.h>

       typedef struct PACKFILE_VTABLE


          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);

       This is the vtable which must be provided for custom packfiles, which then can  read  from
       and  write  to wherever you like (eg. files in memory). You should provide all the entries
       of the vtable, even if they are empty stubs doing  nothing,  to  avoid  Allegro  (or  you)
       calling a NULL method at some point.


       pack_fopen_vtable(3alleg4), expackf(3alleg4)