cppi - indent the C preprocessor directives in FILE to reflect their nesting

       Written by Jim Meyering.

       Copyright  ©  2013  Free  Software  Foundation,  Inc.   License  GPLv3+:  GNU  GPL  version  3  or  later
       <http://gnu.org/licenses/gpl.html>.
       This  is  free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent
       permitted by law.

       Indent  the  C  preprocessor directives in FILE to reflect their nesting and ensure that there is exactly
       one space character between each #if, #elif, #define directive and the following  token,  and  write  the
       result  to  standard  output.   The  number  of  spaces  between the `#' and the following directive must
       correspond to the level of nesting of that directive.  With no FILE, or when FILE  is  -,  read  standard
       input.

       -a, --ansi
              when checking, fail if text follows #else or #endif

       -c, --check
              set exit code, but don't produce any output

       -l, --list-files-only
              don't generate diagnostics about indentation; print to stdout only the names of files that are not
              properly indented

       -m, --max-string-length=LENGTH
              fail  if  there  is a double-quoted string longer than LENGTH;  if LENGTH is 0 (the default), then
              there is no limit

       --help display this help and exit

       --version
              output version information and exit

       With the -c option, don't write to stdout.  Instead, check the indentation of the specified files  giving
       diagnostics for preprocessor lines that aren't properly indented or are otherwise invalid.

       Note that --ansi without --check does not correct the problem of non-ANSI text following #else and #endif
       directives.

   Theexitcodewillbeoneofthese:
       0      all directives properly indented

       1      some  cpp  directive(s)  improperly  indented,  or text follows #else/#endif (enabled with --check--ansi), or a double-quoted string is longer than the specified maximum

       2      #if/#endif mismatch, EOF in comment or string

       3      file (e.g. open/read/write) error

       A pragma directive may have its `#' indented.

       cppi - indent the C preprocessor directives in FILE to reflect their nesting

       Report bugs to <bug-cppi@gnu.org>.

       The full documentation for cppi is maintained as a Texinfo manual.  If the info  and  cppi  programs  are
       properly installed at your site, the command

              infocppi

       should give you access to the complete manual.

GNU cppi 1.18                                      March 2025                                            CPPI(1)

cppi [FILE]
       cppi-c [OPTION] [FILE]...