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|
package Tk::MakeDepend;
use strict;
use vars qw(%define);
use Config;
my @include;
use Carp;
$SIG{__DIE__} = \&Carp::confess;
use vars qw($VERSION);
$VERSION = sprintf '4.%03d', q$Revision: #13 $ =~ /\D(\d+)\s*$/;
sub scan_file;
sub do_include
{
my ($inc,$dep,@include) = @_;
foreach my $dir (@include)
{
my $path = "$dir/$inc";
if (-f $path)
{
scan_file($path,$dep) unless exists $dep->{$path};
return;
}
}
warn "Cannot find '$inc' assume made\n";
$dep->{$inc} = 1;
}
sub remove_comment
{
s#^\s*/\*.*?\*/\s*##g;
}
sub term
{
remove_comment();
return !term() if s/^\s*!//;
return exists($define{$1}) if s/^\s*defined\s*\(([_A-Za-z][_\w]*)\s*\)//;
return exists($define{$1}) if s/^\s*defined\s*([_A-Za-z][_\w]*)//;
return eval "$1" if s/^\s*(0x[0-9a-f]+)//i;
return $1 if s/^\s*(\d+)//;
return $define{$1} || 0 if s/^\s*([_A-Za-z][_\w]*)//;
if (s/^\s*\(//)
{
my $val = expression(0);
warn "Missing ')'\n" unless s/^\s*\)//;
return $val;
}
warn "Invalid term:$_";
return undef;
}
my %pri = ( '&&' => 4,
'||' => 3,
'>=' => 2, '<=' => 2, '<' => 2, '>' => 2,
'==' => 1, '!=' => 1 );
sub expression
{
my $pri = shift;
# printf STDERR "%d# expr . $_\n";
my $invert = 0;
my $lhs = term() || 0;
remove_comment();
while (/^\s*(&&|\|\||>=?|<=?|==|!=)/)
{
my $op = $1;
last unless ($pri{$op} >= $pri);
s/^\s*\Q$op\E//;
# printf STDERR "%d# $lhs $op . $_\n";
my $rhs = expression($pri{$op}) || 0;
my $e = "$lhs $op $rhs";
$lhs = eval "$e" || 0;
die "'$e' $@" if $@;
remove_comment();
}
return $lhs;
}
sub do_if
{
my ($key,$expr) = @_;
chomp($expr);
if ($key eq 'ifdef' || $key eq 'ifndef')
{
if ($expr =~ /^\s*(\w+)/)
{
my $val = exists $define{$1};
$val = !$val if ($key eq 'ifndef');
# printf STDERR "%d from $key $expr\n",$val;
return $val;
}
}
else
{
local $_ = $expr;
my $val = expression(0) != 0;
warn "trailing: $_" if /\S/;
#printf STDERR "%d from $key $expr\n",$val;
return $val;
}
}
sub scan_file
{
no strict 'refs';
my ($file,$dep) = @_;
open($file,"<$file") || die "Cannot open $file:$!";
local $_;
my ($srcdir) = $file =~ m#^(.*)[\\/][^\\/]*$#;
$srcdir = '.' unless defined $srcdir;
my $live = 1;
$dep->{$file} = 1;
my @stack;
while (<$file>)
{
$_ .= <$file> while (s/\\\n/ /);
if (/^\s*#\s*(\w+)\s*(.*?)\s*$/)
{
my $ol = $live;
my $key = $1;
my $rest = $2;
if ($key =~ /^if(.*)$/)
{
push(@stack,$live);
$live &&= do_if($key,$rest);
}
elsif ($key eq 'elif')
{
$live = ($live) ? 0 : $stack[-1];
$live &&= do_if('if',$rest);
}
elsif ($key eq 'else')
{
$live = ($live) ? 0 : $stack[-1];
}
elsif ($key eq 'endif')
{
if (@stack)
{
$live = pop(@stack);
}
else
{
die "$file:$.: Mismatched #endif\n";
}
}
elsif ($live)
{
if ($key eq 'include')
{
do_include($1,$dep,$srcdir,@include) if $rest =~ /^"(.*)"/;
}
elsif ($key eq 'define')
{
if ($rest =~ /^\s*([_A-Za-z][\w_]*)\s*(.*)$/)
{
my $sym = $1;
my $val = $2 || 1;
$val =~ s#\s*/\*.*?\*/\s*# #g;
$define{$sym} = $val;
}
else
{
warn "ignore '$key $rest'\n";
}
}
elsif ($key eq 'undef')
{
if ($rest =~ /^\s*([_A-Za-z][\w_]*)/)
{
delete $define{$1};
}
}
elsif ($key =~ /^(line|pragma)$/)
{
}
else
{
warn "ignore '$key $rest'\n";
}
}
# printf STDERR "$file:$.: %d $key $rest\n",$live if ($ol != $live);
}
else
{
# print if $live;
}
}
close($file);
if (@stack)
{
warn "$file:$.: unclosed #if\n";
}
}
sub command_line
{
@include = ();
local %define = ('__STDC__' => 1 );
my $data = '';
my @files;
while (@_ && $_[-1] !~ /^-/)
{
unshift(@files,pop(@_));
}
my $flags = $Config{ccflags};
$flags =~ s/^\s+|\s+$//g;
my @opt = (@_, split(/\s+/,$flags));
while (@opt)
{
local $_ = shift(@opt);
if (/^-I(.*)$/)
{
push @include,$1;
}
elsif (/^-D([^=]+)(?:=(.*))?$/)
{
$define{$1} = $2 || 1;
}
elsif (/^-U(.*)$/)
{
delete $define{$1};
}
elsif (/^(-.*)$/)
{
# Some option
if ($opt[0] !~ /^-/)
{
# next arg does not start with '-' assume it
# belongs to this option and discard it silently
shift(@opt);
}
}
else
{
# We got confused
warn "Ignoring $1\n";
}
}
# force /usr/include to be last element of @include
push @include, $Config{'usrinc'}
if (defined $Config{'usrinc'} and $Config{'usrinc'} ne '');
# warn "Include:@include\n";
while (@files)
{
local $_ = shift(@files);
unless (/^(.*)\.[^\.]+$/)
{
warn "Skip $_";
next;
}
local %define = %define;
my $base = $1;
my $file = $_;
my %dep;
warn "Finding dependencies for $file\n";
scan_file($_,\%dep);
my $str = "\n$base\$(OBJ_EXT) : $base.c";
delete $dep{$file};
my @dep = (sort(keys %dep));
while (@dep)
{
my $dep = shift(@dep);
$dep =~ s#^\./##;
if (length($str)+length($dep) > 70)
{
$data .= "$str \\\n";
$str = ' ';
}
else
{
$str .= ' ';
}
$str .= $dep;
}
$data .= "$str\n";
}
return $data;
}
1;
__END__
|
