void panic(const char * message);
off_t
#ifndef PARANOID
sparse_image_t::
get_physical_offset();
#endif
void
set_virtual_page(uint32 new_virtual_page);
void read_header();
ssize_t read_page_fragment(uint32 read_virtual_page, uint32 read_page_offset, size_t read_size, void * buf);