1 files changed, 128 insertions, 0 deletions
diff --git a/source4/build/pidl/util.pm b/source4/build/pidl/util.pm
new file mode 100644
index 0000000000..c0182bb79e
--- /dev/null
+++ b/source4/build/pidl/util.pm
@@ -0,0 +1,128 @@
+###################################################
+# utility functions to support pidl
+# Copyright tridge@samba.org 2000
+# released under the GNU GPL
+package util;
+
+use Data::Dumper;
+
+
+#####################################################################
+# flatten an array of arrays into a single array
+sub FlattenArray($) 
+{ 
+    my $a = shift;
+    my @b;
+    for my $d (@{$a}) {
+	for my $d1 (@{$d}) {
+	    push(@b, $d1);
+	}
+    }
+    return \@b;
+}
+
+#####################################################################
+# flatten an array of hashes into a single hash
+sub FlattenHash($) 
+{ 
+    my $a = shift;
+    my %b;
+    for my $d (@{$a}) {
+	for my $k (%{$d}) {
+	    $b{$k} = $d->{$k};
+	}
+    }
+    return \%b;
+}
+
+
+#####################################################################
+# traverse a perl data structure removing any empty arrays or
+# hashes and any hash elements that map to undef
+sub CleanData($)
+{
+    sub CleanData($);
+    my($v) = shift;
+    if (ref($v) eq "ARRAY") {
+	foreach my $i (0 .. $#{$v}) {
+	    CleanData($v->[$i]);
+	    if (ref($v->[$i]) eq "ARRAY" && $#{$v->[$i]}==-1) { delete($v->[$i]); next; }
+	}
+	# this removes any undefined elements from the array
+	@{$v} = grep { defined $_ } @{$v};
+    } elsif (ref($v) eq "HASH") {
+	foreach my $x (keys %{$v}) {
+	    CleanData($v->{$x});
+	    if (!defined $v->{$x}) { delete($v->{$x}); next; }
+	    if (ref($v->{$x}) eq "ARRAY" && $#{$v->{$x}}==-1) { delete($v->{$x}); next; }
+	}
+    }
+}
+
+
+#####################################################################
+# return the modification time of a file
+sub FileModtime($)
+{
+    my($filename) = shift;
+    return (stat($filename))[9];
+}
+
+
+#####################################################################
+# read a file into a string
+sub FileLoad($)
+{
+    my($filename) = shift;
+    local(*INPUTFILE);
+    open(INPUTFILE, $filename) || die "can't open $filename";    
+    my($saved_delim) = $/;
+    undef $/;
+    my($data) = <INPUTFILE>;
+    close(INPUTFILE);
+    $/ = $saved_delim;
+    return $data;
+}
+
+#####################################################################
+# write a string into a file
+sub FileSave($$)
+{
+    my($filename) = shift;
+    my($v) = shift;
+    local(*FILE);
+    open(FILE, ">$filename") || die "can't open $filename";    
+    print FILE $v;
+    close(FILE);
+}
+
+#####################################################################
+# return a filename with a changed extension
+sub ChangeExtension($$)
+{
+    my($fname) = shift;
+    my($ext) = shift;
+    if ($fname =~ /^(.*?)\.(.*?)$/) {
+	return "$1.$ext";
+    }
+    return "$fname.$ext";
+}
+
+#####################################################################
+# save a data structure into a file
+sub SaveStructure($$)
+{
+    my($filename) = shift;
+    my($v) = shift;
+    FileSave($filename, Dumper($v));
+}
+
+#####################################################################
+# load a data structure from a file (as saved with SaveStructure)
+sub LoadStructure($)
+{
+    return eval FileLoad(shift);
+}
+
+
+1;