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NetBSD 6.1.5 - man page for indent (netbsd section 1)

INDENT(1)			   BSD General Commands Manual				INDENT(1)

     indent -- indent and format C program source

     indent [input-file [output-file]] [-bacc | -nbacc] [-bad | -nbad] [-bap | -nbap]
	    [-bbb | -nbbb] [-bc | -nbc] [-bl] [-br] [-cn] [-cdn] [-cdb | -ncdb] [-ce | -nce]
	    [-cin] [-clin] [-dn] [-din] [-fc1 | -nfc1] [-in] [-ip | -nip] [-ln] [-lcn]
	    [-lp | -nlp] [-npro] [-pcs | -npcs] [-psl | -npsl] [-sc | -nsc] [-sob | -nsob] [-st]
	    [-troff] [-v | -nv]

     indent is a C program formatter.  It reformats the C program in the input-file according to
     the switches.  The switches which can be specified are described below.  They may appear
     before or after the file names.

     NOTE: If you only specify an input-file, the formatting is done `in-place', that is, the
     formatted file is written back into input-file and a backup copy of input-file is written in
     the current directory.  If input-file is named '/blah/blah/file', the backup file is named

     If output-file is specified, indent checks to make sure it is different from input-file.

     The options listed below control the formatting style imposed by indent.

     -bacc, -nbacc   If -bacc is specified, a blank line is forced around every conditional com-
		     pilation block.  For example, in front of every #ifdef and after every
		     #endif.  Other blank lines surrounding such blocks will be swallowed.
		     Default: -nbacc.

     -bad, -nbad     If -bad is specified, a blank line is forced after every block of declara-
		     tions.  Default: -nbad.

     -bap, -nbap     If -bap is specified, a blank line is forced after every procedure body.
		     Default: -nbap.

     -bbb, -nbbb     If -bbb is specified, a blank line is forced before every block comment.
		     Default: -nbbb.

     -bc, -nbc	     If -bc is specified, then a newline is forced after each comma in a declara-
		     tion.  -nbc turns off this option.  Default: -bc.

     -br, -bl	     Specifying -bl lines up compound statements like this:

			   if (...)

		     Specifying -br (the default) makes them look like this:

			   if (...) {

     -bs, -nbs	     If -bs is specified, a blank is forced after sizeof.  Default: -nbs.

     -cn	     The column in which comments on code start.  Default: -c33.

     -cdn	     The column in which comments on declarations start.  The default is for
		     these comments to start in the same column as those on code.

     -cdb, -ncdb     Enables (disables) the placement of comment delimiters on blank lines.  With
		     this option enabled, comments look like this:

				    * this is a comment

		     Rather than like this:

				   /* this is a comment */

		     This only affects block comments, not comments to the right of code.
		     Default: -cdb.

     -ce, -nce	     Enables (disables) forcing `else's to cuddle up to the immediately preceding
		     `}'.  Default: -ce.

     -cin	     Sets the continuation indent to be n.  Continuation lines will be indented
		     that far from the beginning of the first line of the statement.  Parenthe-
		     sized expressions have extra indentation added to indicate the nesting,
		     unless -lp is in effect.  -ci defaults to the same value as -i.

     -clin	     Causes case labels to be indented n tab stops to the right of the containing
		     switch statement.	-cli0.5 causes case labels to be indented half a tab
		     stop.  Default: -cli0.

     -dn	     Controls the placement of comments which are not to the right of code.  For
		     example, -d1 means that such comments are placed one indentation level to
		     the left of code.	Specifying the default -d0 lines up these comments with
		     the code.	See the section on comment indentation below.

     -din	     Specifies the indentation, in character positions, from a declaration key-
		     word to the following identifier.	Default: -di16.

     -dj, -ndj	     -dj left justifies declarations.  -ndj indents declarations the same as
		     code.  Default: -ndj.

     -ei, -nei	     Enables (disables) special else-if processing.  If it's enabled, an if fol-
		     lowing an else will have the same indentation as the preceding if statement.
		     Default: -ei.

     -eei, -neei     Enables (disables) extra indentation on continuation lines of the expression
		     part of if and while statements.  These continuation lines will be indented
		     one extra level.  Default: -neei.

     -fc1, -nfc1     Enables (disables) the formatting of comments that start in column 1.
		     Often, comments whose leading `/' is in column 1 have been carefully hand
		     formatted by the programmer.  In such cases, -nfc1 should be used.  Default:

     -in	     The number of spaces for one indentation level.  Default: -i8.

     -ip, -nip	     Enables (disables) the indentation of parameter declarations from the left
		     margin.  Default: -ip.

     -ln	     Maximum length of an output line.	Default: -l78.

     -lp, -nlp	     Lines up code surrounded by parenthesis in continuation lines.  If a line
		     has a left parenthesis which is not closed on that line, then continuation
		     lines will be lined up to start at the character position just after the
		     left parenthesis.	For example, here is how a piece of continued code looks
		     with -nlp in effect:

			   p1 = first_procedure(second_procedure(p2, p3),

		     With -lp in effect (the default) the code looks somewhat clearer:

			   p1 = first_procedure(second_procedure(p2, p3),

		     Inserting two more newlines we get:

			   p1 = first_procedure(second_procedure(p2,

     -npro	     Causes the profile files, './.indent.pro' and '~/.indent.pro', to be

     -pcs, -npcs     If true (-pcs) all procedure calls will have a space inserted between the
		     name and the `('.	Default: -npcs.

     -psl, -npsl     If true (-psl) the names of procedures being defined are placed in column 1
		     - their types, if any, will be left on the previous lines.  Default: -psl.

     -sc, -nsc	     Enables (disables) the placement of asterisks (`*'s) at the left edge of all
		     comments.	Default: -sc.

     -sob, -nsob     If -sob is specified, indent will swallow optional blank lines.  You can use
		     this to get rid of blank lines after declarations.  Default: -nsob.

     -st	     Causes indent to take its input from stdin, and put its output to stdout.

     -Ttypename      Adds typename to the list of type keywords.  Names accumulate: -T can be
		     specified more than once.	You need to specify all the typenames that appear
		     in your program that are defined by typedef - nothing will be harmed if you
		     miss a few, but the program won't be formatted as nicely as it should.  This
		     sounds like a painful thing to have to do, but it's really a symptom of a
		     problem in C: typedef causes a syntactic change in the language and indent
		     can't find all instances of typedef.

     -troff	     Causes indent to format the program for processing by troff(1).  It will
		     produce a fancy listing in much the same spirit as vgrind(1).  If the output
		     file is not specified, the default is standard output, rather than format-
		     ting in place.

     -v, -nv	     -v turns on `verbose' mode; -nv turns it off.  When in verbose mode, indent
		     reports when it splits one line of input into two or more lines of output,
		     and gives some size statistics at completion.  Default: -nv.

     You may set up your own `profile' of defaults to indent by creating a file called
     .indent.pro in your login directory and/or the current directory and including whatever
     switches you like.  A `.indent.pro' in the current directory takes precedence over the one
     in your login directory.  If indent is run and a profile file exists, then it is read to set
     up the program's defaults.  Switches on the command line, though, always override profile
     switches.	The switches should be separated by spaces, tabs or newlines.

     'Box' comments.  indent assumes that any comment with a dash or star immediately after the
     start of comment (that is, `/*-' or `/**') is a comment surrounded by a box of stars.  Each
     line of such a comment is left unchanged, except that its indentation may be adjusted to
     account for the change in indentation of the first line of the comment.

     Straight text.  All other comments are treated as straight text.  indent fits as many words
     (separated by blanks, tabs, or newlines) on a line as possible.  Blank lines break para-

   Comment indentation
     If a comment is on a line with code it is started in the `comment column', which is set by
     the -cn command line parameter.  Otherwise, the comment is started at n indentation levels
     less than where code is currently being placed, where n is specified by the -dn command line
     parameter.  If the code on a line extends past the comment column, the comment starts fur-
     ther to the right, and the right margin may be automatically extended in extreme cases.

   Preprocessor lines
     In general, indent leaves preprocessor lines alone.  The only reformatting that it will do
     is to straighten up trailing comments.  It leaves embedded comments alone.  Conditional com-
     pilation (#ifdef...#endif) is recognized and indent attempts to correctly compensate for the
     syntactic peculiarities introduced.

   C syntax
     indent understands a substantial amount about the syntax of C, but it has a `forgiving'
     parser.  It attempts to cope with the usual sorts of incomplete and misformed syntax.  In
     particular, the use of macros like:

	   #define forever for(;;)

     is handled properly.

     indent uses the HOME environment variable.

     ./.indent.pro  profile file
     ~/.indent.pro  profile file

     The indent command appeared in 4.2BSD.

     indent has even more switches than ls(1).

     A common mistake that often causes grief is typing:

	   indent *.c

     to the shell in an attempt to indent all the C programs in a directory.  This is probably a
     bug, not a feature.

BSD					   July 1, 1993 				      BSD

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