(MAX_ADDRESS_LENGTH, pseudo_offset, format_address,

(MAX_ADDRESS_LENGTH, pseudo_offset, format_address,
n_bytes_to_skip, skip, format_address_none,
format_address_std, format_address_paren,
format_address_label, write_block, parse_old_offset, dump,
dump_strings, main):
Use uintmax_t, not off_t, for file addresses, so that we can
handle multiple large files even if the sum of their sizes
exceeds off_t limits.

(print_s_char, print_char, print_s_short, print_short,
print_int, print_long, print_long_long, print_float,
print_double, print_long_double, dump_hexl_mode_trailer,
print_named_ascii, print_ascii, decode_one_format):
Use size_t, not off_t, for in-memory byte counts.

(end_offset): New var.
(dump, dump_strings): Use it.
(main): Set it, but check for overflow while doing so.

(skip): Report an error if an in-range lseek fails on a
regular file, as something's seriously wrong.  Check for
negative regular file sizes (possible with some broken NFS
implementations).

(parse_old_offset): Now all offsets are valid, so return a
success boolean and take a pointer to an offset as an argument.
All callers changed.

(dump_strings): Check for overflow when computing end_offset -
string_min.

(main): Remove OFF_T_MAX checks that are no longer needed.
Don't bother assigning through temporary when there's no size
limit to check.