#! /usr/bin/perl
#
# checkversion find uses of LINUX_VERSION_CODE or KERNEL_VERSION
# without including <linux/version.h>, or cases of
# including <linux/version.h> that don't need it.
# Copyright (C) 2003, Randy Dunlap <rdunlap@xenotime.net>

use strict;

$| = 1;

my $debugging;

foreach my $file (@ARGV) {
    next if $file =~ "include/linux/version\.h";
    # Open this file.
    open( my $f, '<', $file )
      or die "Can't open $file: $!\n";

    # Initialize variables.
    my ($fInComment, $fInString, $fUseVersion);
    my $iLinuxVersion = 0;

    while (<$f>) {
	# Strip comments.
	$fInComment && (s+^.*?\*/+ +o ? ($fInComment = 0) : next);
	m+/\*+o && (s+/\*.*?\*/+ +go, (s+/\*.*$+ +o && ($fInComment = 1)));

	# Pick up definitions.
	if ( m/^\s*#/o ) {
	    $iLinuxVersion      = $. if m/^\s*#\s*include\s*"linux\/version\.h"/o;
	}

	# Strip strings.
	$fInString && (s+^.*?"+ +o ? ($fInString = 0) : next);
	m+"+o && (s+".*?"+ +go, (s+".*$+ +o && ($fInString = 1)));

	# Pick up definitions.
	if ( m/^\s*#/o ) {
	    $iLinuxVersion      = $. if m/^\s*#\s*include\s*<linux\/version\.h>/o;
	}

	# Look for uses: LINUX_VERSION_CODE, KERNEL_VERSION, UTS_RELEASE
	if (($_ =~ /LINUX_VERSION_CODE/) || ($_ =~ /\WKERNEL_VERSION/)) {
	    $fUseVersion = 1;
            last if $iLinuxVersion;
        }
    }

    # Report used version IDs without include?
    if ($fUseVersion && ! $iLinuxVersion) {
	print "$file: $.: need linux/version.h\n";
    }

    # Report superfluous includes.
    if ($iLinuxVersion && ! $fUseVersion) {
	print "$file: $iLinuxVersion linux/version.h not needed.\n";
    }

    # debug: report OK results:
    if ($debugging) {
        if ($iLinuxVersion && $fUseVersion) {
	    print "$file: version use is OK ($iLinuxVersion)\n";
        }
        if (! $iLinuxVersion && ! $fUseVersion) {
	    print "$file: version use is OK (none)\n";
        }
    }

    close($f);
}
rivate-remove&amp;id=91eaa475e287e7cf87959d68fb273e4f092897f4'>tree</a><a href='/cgit.cgi/linux/net-next.git/commit/sound/soc/codecs/ad193x.c?h=nds-private-remove&amp;id=91eaa475e287e7cf87959d68fb273e4f092897f4'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/sound/soc/codecs/ad193x.c?h=nds-private-remove&amp;id=91eaa475e287e7cf87959d68fb273e4f092897f4'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/sound/soc/codecs/ad193x.c'>
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<option value='grep'>log msg</option>
<option value='author'>author</option>
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</form>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?h=nds-private-remove&amp;id=91eaa475e287e7cf87959d68fb273e4f092897f4'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound?h=nds-private-remove&amp;id=91eaa475e287e7cf87959d68fb273e4f092897f4'>sound</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/soc?h=nds-private-remove&amp;id=91eaa475e287e7cf87959d68fb273e4f092897f4'>soc</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/soc/codecs?h=nds-private-remove&amp;id=91eaa475e287e7cf87959d68fb273e4f092897f4'>codecs</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/soc/codecs/ad193x.c?h=nds-private-remove&amp;id=91eaa475e287e7cf87959d68fb273e4f092897f4'>ad193x.c</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/sound/soc/codecs/ad193x.c?h=nds-private-remove&amp;id=91eaa475e287e7cf87959d68fb273e4f092897f4&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>