From e581569a87aa76d6068bfd5238ab320e159c5456 Mon Sep 17 00:00:00 2001
From: Tim Potter <tpot@samba.org>
Date: Sat, 24 Nov 2001 23:37:57 +0000
Subject: Initial version of ethereal parser generator.  Works with test.idl
 but not much else! (This used to be commit
 84fe4a000cb31ca5cdd24d9b8e57a63b8c0e8838)

---
 source4/build/pidl/eparser.pm | 216 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 216 insertions(+)
 create mode 100644 source4/build/pidl/eparser.pm

diff --git a/source4/build/pidl/eparser.pm b/source4/build/pidl/eparser.pm
new file mode 100644
index 0000000000..835173a66f
--- /dev/null
+++ b/source4/build/pidl/eparser.pm
@@ -0,0 +1,216 @@
+###################################################
+# Ethereal parser generator for IDL structures
+# Copyright tpot@samba.org 2001
+# Copyright tridge@samba.org 2000
+# released under the GNU GPL
+
+package IdlEParser;
+
+use Data::Dumper;
+
+my($res);
+
+#####################################################################
+# parse a properties list
+sub ParseProperties($)
+{
+    my($props) = shift;
+    foreach my $d (@{$props}) {
+	if (ref($d) ne "HASH") {
+	    $res .= "[$d] ";
+	} else {
+	    foreach my $k (keys %{$d}) {
+		$res .= "[$k($d->{$k})] ";
+	    }
+	}
+    }
+}
+
+#####################################################################
+# parse a structure element
+sub ParseElement($)
+{
+    my($element) = shift;
+    (defined $element->{PROPERTIES}) && ParseProperties($element->{PROPERTIES});
+    ParseType($element->{TYPE});
+    $res .= " ";
+    if ($element->{POINTERS}) {
+	for (my($i)=0; $i < $element->{POINTERS}; $i++) {
+	    $res .= "*";
+	}
+    }
+    $res .= "$element->{NAME}";
+    (defined $element->{ARRAY_LEN}) && ($res .= "[$element->{ARRAY_LEN}]");
+}
+
+#####################################################################
+# parse a struct
+sub ParseStruct($)
+{
+    my($struct) = shift;
+
+    if (defined $struct->{ELEMENTS}) {
+
+	# Parse scalars
+
+	$res .= "\t/* Parse scalars */\n\n";
+
+	foreach my $e (@{$struct->{ELEMENTS}}) {
+	    if (defined $e->{POINTERS}) {
+		$res .= "\tptr_$e->{NAME} = prs_$e->{TYPE}_ptr(); /* $e->{NAME} */\n";
+	    } else {
+		$res .= "\tprs_$e->{TYPE}(); /* $e->{NAME} */\n";
+	    }
+	}	
+
+	# Parse buffers
+
+	$res .= "\n\t/* Parse buffers */\n\n";
+
+	foreach my $e (@{$struct->{ELEMENTS}}) {
+	    $res .= "\tif (ptr_$e->{NAME})\n\t\tprs_$e->{TYPE}(); /* $e->{NAME} */\n\n",
+	    if (defined $e->{POINTERS});
+	}
+    }
+}
+
+
+#####################################################################
+# parse a union element
+sub ParseUnionElement($)
+{
+    my($element) = shift;
+    $res .= "[case($element->{CASE})] ";
+    ParseElement($element->{DATA});
+    $res .= ";\n";
+}
+
+#####################################################################
+# parse a union
+sub ParseUnion($)
+{
+    my($union) = shift;
+    (defined $union->{PROPERTIES}) && ParseProperties($union->{PROPERTIES});
+    $res .= "union {\n";
+    foreach my $e (@{$union->{DATA}}) {
+	ParseUnionElement($e);
+    }
+    $res .= "}";
+}
+
+#####################################################################
+# parse a type
+sub ParseType($)
+{
+    my($data) = shift;
+    if (ref($data) eq "HASH") {
+	($data->{TYPE} eq "STRUCT") &&
+	    ParseStruct($data);
+	($data->{TYPE} eq "UNION") &&
+	    ParseUnion($data);
+    } else {
+	$res .= "$data";
+    }
+}
+
+#####################################################################
+# parse a typedef
+sub ParseTypedef($)
+{
+    my($typedef) = shift;
+    $res .= "void prs_$typedef->{NAME}(void)\n{\n";
+    ParseType($typedef->{DATA});
+    $res .= "}\n\n";
+}
+
+#####################################################################
+# parse a function
+sub ParseFunctionArg($$)
+{ 
+    my($arg) = shift;
+    my($io) = shift;		# "in" or "out"
+
+    if (@{$arg->{PROPERTIES}}[0] =~ /$io/) {
+	my $is_pol = 0;
+	    
+	# Arg is a policy handle - no pointer
+	    
+	foreach my $prop (@{$arg->{PROPERTIES}}) {
+	    if ($prop =~ /context_handle/) {
+		$res .= "\tprs_policy_hnd();";
+		$is_pol = 1;
+	    }
+	}
+	
+	if (!$is_pol) {
+	    if ($arg->{POINTERS}) {
+		$res .= "\tptr_$arg->{NAME} = prs_ptr();\n";
+		$res .= "\tif (ptr_$arg->{NAME})\n\t\tprs_$arg->{TYPE}();";
+	    } else {
+		$res .= "\tprs_$arg->{TYPE}();";
+	    }
+	}
+	
+	$res .= "\t/* $arg->{NAME} */\n";
+    }
+}
+    
+#####################################################################
+# parse a function
+sub ParseFunction($)
+{ 
+    my($function) = shift;
+
+    # Input function
+
+    $res .= "void $function->{NAME}_q(void)\n{\n";
+
+    foreach my $arg (@{$function->{DATA}}) {
+	ParseFunctionArg($arg, "in");
+    }
+    
+    $res .= "}\n\n";
+    
+    # Output function
+
+    $res .= "void $function->{NAME}_r(void)\n{\n";
+
+    foreach my $arg (@{$function->{DATA}}) {
+	ParseFunctionArg($arg, "out");
+    }
+
+    $res .= "\tprs_$function->{RETURN_TYPE}();\t/* Return value */\n";
+
+    $res .= "}\n\n";
+
+}
+
+#####################################################################
+# parse the interface definitions
+sub ParseInterface($)
+{
+    my($interface) = shift;
+    my($data) = $interface->{DATA};
+    foreach my $d (@{$data}) {
+	($d->{TYPE} eq "TYPEDEF") &&
+	    ParseTypedef($d);
+	($d->{TYPE} eq "FUNCTION") && 
+	    ParseFunction($d);
+    }
+}
+
+
+#####################################################################
+# parse a parsed IDL structure back into an IDL file
+sub Parse($)
+{
+    my($idl) = shift;
+    $res = "/* parser auto-generated by pidl */\n\n";
+    foreach my $x (@{$idl}) {
+	($x->{TYPE} eq "INTERFACE") && 
+	    ParseInterface($x);
+    }
+    return $res;
+}
+
+1;
-- 
cgit