LBXfile *lbx_file_open(LBX *lbx, unsigned fileno);
size_t lbx_file_read(LBXfile *f, void *buf, size_t n);
int lbx_file_seek(LBXfile *f, long offset, int whence);
LBXfile *lbx_file_open(LBX *lbx, unsigned fileno);
size_t lbx_file_read(LBXfile *f, void *buf, size_t n);
int lbx_file_seek(LBXfile *f, long offset, int whence);