(struct bin_str): Make len int, not unsigned, to avoid

(struct bin_str): Make len int, not unsigned, to avoid
bogus comparison < 0.
(quote_filename): Add forward decl.
(decode_switches): -b, -e, -N, -Q are now mutually exclusive.
(print_dir): Quote directory name as per quoting options.
(print_long_format): Don't count color changes as part of file name.
(quote_filename): Revamp interface: now accepts stream to output to
and filename, and returns length of quoted filename.
This removes duplicated code and should make errors less likely.
Also, no longer mallocs storage.  All callers changed.
Don't quote ' ' if -Q.
(OUTCHAR): New macro.
(SAVECHAR, SAVE_2_CHARS): Remove.
(print_name_with_quoting): New stack arg.  All callers changed.
(print_color_indicator): Cast ext len to size_t to avoid warning
with GCC 2.8.
(length_of_file_name_and_frills): Rewrite to use quote_filename.
This fixes bug when computing file name length with -e.
1997-12-14  Paul Eggert  <eggert@twinsun.com>
Add shell style quoting, and make it the default.
* NEWS, doc/fileutils.texi: Describe -e, which is now the default.
Describe change to --dired output.
* src/ls.c (quote_shell): New var.
(long_options, decode_switches, usage): New option -e or --quote-shell.
(dired_dump_obstack): New arg STYLE.
(main): Pass quoting style to dired_dump_obstack.
(decode_switches): -N now clears quote_as_string.
(quote_filename): Add shell style quoting.