From f46072d2232c76b8ec29ce7d76b81fe7bbb4bc26 Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <tridge@samba.org>
Date: Fri, 19 Dec 2003 00:40:40 +0000
Subject: added code to the IDL validator to check for common errors with
 pointers are arrays (This used to be commit
 e67cbfff6c1041671711e4f73894e6e13151d57e)

---
 source4/build/pidl/util.pm      | 13 +++++++++++--
 source4/build/pidl/validator.pm | 41 ++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 51 insertions(+), 3 deletions(-)

diff --git a/source4/build/pidl/util.pm b/source4/build/pidl/util.pm
index b732c185b2..2a4c0de74d 100644
--- a/source4/build/pidl/util.pm
+++ b/source4/build/pidl/util.pm
@@ -133,14 +133,23 @@ sub ChangeExtension($$)
     return "$fname$ext";
 }
 
+#####################################################################
+# a dumper wrapper to prevent dependence on the Data::Dumper module
+# unless we actually need it
+sub MyDumper($)
+{
+	require Data::Dumper;
+	my $s = shift;
+	return Data::Dumper::Dumper($s);
+}
+
 #####################################################################
 # save a data structure into a file
 sub SaveStructure($$)
 {
-	require Data::Dumper;
 	my($filename) = shift;
 	my($v) = shift;
-	FileSave($filename, Data::Dumper::Dumper($v));
+	FileSave($filename, MyDumper($v));
 }
 
 #####################################################################
diff --git a/source4/build/pidl/validator.pm b/source4/build/pidl/validator.pm
index 79f1c6be88..ee1c33ef4c 100644
--- a/source4/build/pidl/validator.pm
+++ b/source4/build/pidl/validator.pm
@@ -16,6 +16,38 @@ sub fatal($)
 	die "IDL is not valid\n";
 }
 
+sub el_name($)
+{
+	my $e = shift;
+
+	if ($e->{PARENT} && $e->{PARENT}->{NAME}) {
+		return "$e->{PARENT}->{NAME}.$e->{NAME}";
+	}
+
+	if ($e->{PARENT} && $e->{PARENT}->{PARENT}->{NAME}) {
+		return "$e->{PARENT}->{PARENT}->{NAME}.$e->{NAME}";
+	}
+
+	if ($e->{PARENT}) {
+		return "$e->{PARENT}->{NAME}.$e->{NAME}";
+	}
+	return $e->{NAME};
+}
+
+#####################################################################
+# parse a struct
+sub ValidElement($)
+{
+	my $e = shift;
+	if ($e->{POINTERS} && $e->{POINTERS} > 1) {
+		fatal(el_name($e) . " : pidl cannot handle multiple pointer levels. Use a sub-structure containing a pointer instead\n");
+	}
+
+	if ($e->{POINTERS} && $e->{ARRAY_LEN}) {
+		fatal(el_name($e) . " : pidl cannot handle pointers to arrays. Use a substructure instead\n");
+	}
+}
+
 #####################################################################
 # parse a struct
 sub ValidStruct($)
@@ -23,7 +55,8 @@ sub ValidStruct($)
 	my($struct) = shift;
 
 	foreach my $e (@{$struct->{ELEMENTS}}) {
-
+		$e->{PARENT} = $struct;
+		ValidElement($e);
 	}
 }
 
@@ -34,6 +67,8 @@ sub ValidUnion($)
 {
 	my($union) = shift;
 	foreach my $e (@{$union->{DATA}}) {
+		$e->{PARENT} = $union;
+		ValidElement($e);
 	}
 }
 
@@ -44,6 +79,8 @@ sub ValidTypedef($)
 	my($typedef) = shift;
 	my $data = $typedef->{DATA};
 
+	$data->{PARENT} = $typedef;
+
 	if (ref($data) eq "HASH") {
 		if ($data->{TYPE} eq "STRUCT") {
 			ValidStruct($data);
@@ -62,9 +99,11 @@ sub ValidFunction($)
 	my($fn) = shift;
 
 	foreach my $e (@{$fn->{DATA}}) {
+		$e->{PARENT} = $fn;
 		if (util::has_property($e, "ref") && !$e->{POINTERS}) {
 			fatal "[ref] variables must be pointers ($fn->{NAME}/$e->{NAME})\n";
 		}
+		ValidElement($e);
 	}
 }
 
-- 
cgit