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-.\" Ctags-new is a modified version of the ctags produced by UCB and
-.\" distributed in their BSD distributions.
-.\" You should be able to diff this version against theirs to see what I
-.\" have changed.
-.\" 	Warren Toomey
-.\"
-.\" Copyright (c) 1987, 1990 The Regents of the University of California.
-.\" All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\" 3. All advertising materials mentioning features or use of this software
-.\"    must display the following acknowledgement:
-.\"	This product includes software developed by the University of
-.\"	California, Berkeley and its contributors.
-.\" 4. Neither the name of the University nor the names of its contributors
-.\"    may be used to endorse or promote products derived from this software
-.\"    without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\"     @(#)ctags.1	6.8 (Berkeley) 4/24/91
-.\"
-.Dd April 24, 1991
-.Dt CTAGS 1
-.Os BSD 4
-.Sh NAME
-.Nm ctags-new
-.Nd create a tags file
-.Sh SYNOPSIS
-.Nm ctags-new
-.Op Fl BFadtuwvx
-.Op Fl f Ar tagsfile
-.Ar name ...
-.Sh DESCRIPTION
-.Nm Ctags-new
-makes a tags file for
-.Xr ex 1
-from the specified C,
-Pascal, Fortran,
-.Tn YACC ,
-lex, and lisp sources.  A tags file gives the
-locations of specified objects in a group of files.  Each line of the
-tags file contains the object name, the file in which it is defined,
-and a search pattern for the object definition, separated by white-space.
-Using the
-.Ar tags
-file,
-.Xr ex 1
-can quickly locate these object
-definitions.  Depending on the options provided to
-.Nm ctags-new ,
-objects will consist of subroutines, typedefs, defines, structs,
-enums and unions.
-.Bl -tag -width Ds
-.It Fl B
-use backward searching patterns
-.Pq Li ?...? .
-.It Fl F
-use forward searching patterns
-.Pq Li /.../
-(the default).
-.It Fl a
-append to
-.Ar tags
-file.
-.It Fl d
-create tags for
-.Li #defines
-that don't take arguments;
-.Li #defines
-that take arguments are tagged automatically.
-.It Fl f
-Places the tag descriptions in a file called
-.Ar tagsfile .
-The default behaviour is to place them in a file
-.Ar tags .
-.It Fl t
-create tags for typedefs, structs, unions, and enums.
-.It Fl u
-update the specified files in the
-.Ar tags
-file, that is, all
-references to them are deleted, and the new values are appended to the
-file.  (Beware: this option is implemented in a way which is rather
-slow; it is usually faster to simply rebuild the
-.Ar tags
-file.)
-.It Fl v
-An index of the form expected by
-.Xr vgrind 1
-is produced on the standard output.  This listing
-contains the object name, file name, and page number (assuming 64
-line pages).  Since the output will be sorted into lexicographic order,
-it may be desired to run the output through
-.Xr sort 1 .
-Sample use:
-.Bd -literal -offset indent
-ctags-new \-v files \&| sort \-f > index
-vgrind \-x index
-.Ed
-.It Fl y
-Yet another output format. This produces lines with the information:
-symbol, line number, file name, type of symbol, each separated by whitespace.
-This is used by the
-.Xr src2html 1L
-program.
-.It Fl w
-suppress warning diagnostics.
-.It Fl x
-.Nm ctags-new
-produces a list of object
-names, the line number and file name on which each is defined, as well
-as the text of that line and prints this on the standard output.  This
-is a simple index which can be printed out as an off-line readable
-function index.
-.El
-.Pp
-Files whose names end in
-.Nm \&.c
-or
-.Nm \&.h
-are assumed to be C
-source files and are searched for C style routine and macro definitions.
-Files whose names end in
-.Nm \&.y
-are assumed to be
-.Tn YACC
-source files.
-Files whose names end in
-.Nm \&.l
-are assumed to be lisp files if their
-first non-blank character is `;', `(', or `[',
-otherwise, they are
-treated as lex files.  Other files are first examined to see if they
-contain any Pascal or Fortran routine definitions, and, if not, are
-searched for C style definitions.
-.Pp
-The tag
-.Li main
-is treated specially in C programs.  The tag formed
-is created by prepending
-.Ar M
-to the name of the file, with the
-trailing
-.Nm \&.c
-and any leading pathname components removed.  This
-makes use of
-.Nm ctags-new
-practical in directories with more than one
-program.
-.Pp
-Yacc and lex files each have a special tag.
-.Ar Yyparse
-is the start
-of the second section of the yacc file, and
-.Ar yylex
-is the start of
-the second section of the lex file.
-.Sh FILES
-.Bl -tag -width tags -compact
-.It Pa tags
-default output tags file
-.El
-.Sh DIAGNOSTICS
-.Nm Ctags-new
-exits with a value of 1 if an error occurred, where
-duplicate objects are not considered errors, 0 otherwise.
-.Sh SEE ALSO
-.Xr ex 1 ,
-.Xr vi 1
-.Sh BUGS
-Recognition of
-.Nm functions  ,
-.Nm subroutines
-and
-.Nm procedures
-for
-.Tn FORTRAN
-and Pascal is done is a very simpleminded way.  No attempt
-is made to deal with block structure; if you have two Pascal procedures
-in different blocks with the same name you lose.
-.Nm Ctags-new
-doesn't
-understand about Pascal types.
-.Pp
-The method of deciding whether to look for C, Pascal or
-.Tn FORTRAN
-functions is a hack.
-.Pp
-.Nm Ctags-new
-relies on the input being well formed, and any syntactical
-errors will completely confuse it.  It also finds some legal syntax
-confusing; for example, as it doesn't understand
-.Li #ifdef Ns 's ,
-(incidentally, that's a feature, not a bug) any code with unbalanced
-braces inside
-.Li #ifdef Ns 's
-will cause it to become somewhat disoriented.
-In a similar fashion, multiple line changes within a definition will
-cause it to enter the last line of the object, rather than the first, as
-the searching pattern.  The last line of multiple line
-.Li typedef Ns 's
-will similarly be noted.
-.Sh HISTORY
-The
-.Nm
-command appeared in 
-.Bx 3.0 .