Before, running `printf 1234| ./od --width=4 --read-bytes=4'
printed output for 8 bytes -- the last four were garbage.
This happened only when the dump limit, N, was specified (with
--read-bytes=N) and N was a multiple of bytes_per_block
(usually 16, but 4 in this example). From Andreas Schwab.
(main): Write (de facto) standard Plumb/Lankester format.
New option: --quiet.
Check option no longer takes an argument.
When checking, exit status reflects success.
silently overflow, accepting a group id larger than INT_MAX.
(isnumber): Remove now-unused static function.
(change_file_group) [MAXUID]: Give a more descriptive message
when numeric group id is larger than MAXUID.
individual local variables before performing computation on them,
then copy results back into returned struct. Solely for better
optimization by compilers that can't keep struct members in
registers. From Ulrich Drepper.
Don't use #elif. Some older compilers don't grok it.
(split_3): New function to parse out sum, flag, and filename
when reading check file.
(hex_digits): Remove length parameter since string parameter is
now nul-terminated.
(main): Don't allocate separate arrays for filename and sum
when checking. Get pointers into line buffer with split_3 instead
of using sscanf.
(hex_digits): New function.
(result): Give ctx parameter the `const' attribute.
(usage): Rewrite to make it clearer that there are three modes.
(main): Process all options before generating any output.
In particular, collect all --string options rather than operating
on them as they are encountered.
Allow --check=-. Before it tried to open the file named `-'.
Detect bogus input when --check'ing: non-hex, non-[tb] flag.
Map to lower case all hex digits read from check file.
(is_char_class_member): Set a variable in each branch of switch stmt
and return that value after the switch (rather than returning directly
from every branch).
(unquote): More int->size_t changes.
(build_spec_list): More int->size_t changes.
Be very careful about comparison now that variables are unsigned:
Use i + 2 < len rather than i < len - 2. The latter failed for len < 2.
Use size_t rather than int or unsigned long where reasonable.
(get_spec_status): Make interface cleaner.
(get_s1_spec_status): New function.
(get_s2_spec_status): New function.
(validate): Use new functions.
(long_options): Add NULL entry. From Uli.
Touch up some comments.
(process_buffer): Bracket definition of OP with do...while(0) so stmts can be
semicolon terminated.
Jim Meyering