| Current File : //usr/bin/ifnames |
#! /usr/bin/perl
# -*- perl -*-
# Generated from bin/ifnames.in; do not edit by hand.
eval 'case $# in 0) exec /usr/bin/perl -S "$0";; *) exec /usr/bin/perl -S "$0" "$@";; esac'
if 0;
# ifnames - print the identifiers used in C preprocessor conditionals
# Copyright (C) 1994-1995, 1999-2003, 2005-2017, 2020-2021 Free Software
# Foundation, Inc.
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
# Reads from stdin if no files are given.
# Writes to stdout.
# Written by David MacKenzie <djm@gnu.ai.mit.edu>
# and Paul Eggert <eggert@twinsun.com>.
use 5.006;
use strict;
use warnings FATAL => 'all';
BEGIN
{
my $pkgdatadir = $ENV{'autom4te_perllibdir'} || '/usr/share/autoconf';
unshift @INC, $pkgdatadir;
# Override SHELL. On DJGPP SHELL may not be set to a shell
# that can handle redirection and quote arguments correctly,
# e.g.: COMMAND.COM. For DJGPP always use the shell that configure
# has detected.
$ENV{'SHELL'} = '/bin/sh' if ($^O eq 'dos');
}
use Autom4te::General;
use Autom4te::XFile;
use Autom4te::FileUtils;
# $HELP
# -----
$help = "Usage: $0 [OPTION]... [FILE]...
Scan all of the C source FILES (or the standard input, if none are
given) and write to the standard output a sorted list of all the
identifiers that appear in those files in '#if', '#elif', '#ifdef', or
'#ifndef' directives. Print each identifier on a line, followed by a
space-separated list of the files in which that identifier occurs.
-h, --help print this help, then exit
-V, --version print version number, then exit
Report bugs to <bug-autoconf\@gnu.org>.
GNU Autoconf home page: <https://www.gnu.org/software/autoconf/>.
General help using GNU software: <https://www.gnu.org/gethelp/>.
";
# $VERSION
# --------
$version = "ifnames (GNU Autoconf) 2.71
Copyright (C) 2021 Free Software Foundation, Inc.
License GPLv3+/Autoconf: GNU GPL version 3 or later
<https://gnu.org/licenses/gpl.html>, <https://gnu.org/licenses/exceptions.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Written by David J. MacKenzie and Paul Eggert.
";
# &parse_args ()
# --------------
# Process any command line arguments.
sub parse_args ()
{
getopt ();
}
# %OCCURRENCE
# -----------
my %occurrence;
# &scan_file ($FILE-NAME)
# -----------------------
sub scan_file ($)
{
my ($file_name) = @_;
my $file = new Autom4te::XFile ($file_name, "<");
while ($_ = $file->getline)
{
# Continuation lines.
$_ .= $file->getline
while (s/\\$//);
# Preprocessor directives.
if (s/^\s*\#\s*(if|ifdef|ifndef|elif)\s+//)
{
# Remove comments. Not perfect, but close enough.
s(/\*.*?\*/)();
s(/\*.*)();
s(//.*)();
foreach my $word (split (/\W+/))
{
next
if $word eq 'defined' || $word !~ /^[a-zA-Z_]/;
$occurrence{$word}{$file_name} = 1;
}
}
}
}
## ------ ##
## Main. ##
## ------ ##
parse_args();
foreach (@ARGV)
{
scan_file ($_);
}
foreach (sort keys %occurrence)
{
print "$_ ", join (' ', sort keys %{$occurrence{$_}}), "\n";
}
### Setup "GNU" style for perl-mode and cperl-mode.
## Local Variables:
## perl-indent-level: 2
## perl-continued-statement-offset: 2
## perl-continued-brace-offset: 0
## perl-brace-offset: 0
## perl-brace-imaginary-offset: 0
## perl-label-offset: -2
## cperl-indent-level: 2
## cperl-brace-offset: 0
## cperl-continued-brace-offset: 0
## cperl-label-offset: -2
## cperl-extra-newline-before-brace: t
## cperl-merge-trailing-else: nil
## cperl-continued-statement-offset: 2
## End: