[gupnp-dlna] Add a script that extract restriction attributes and their types

[Jens Georg <jensgeorg src gnome org>]

commit 992e10ea20fafc46e2a06c20718d232709aa80b1
Author: Krzesimir Nowak <krnowak openismus com>
Date:   Thu Nov 15 15:39:48 2012 +0100

    Add a script that extract restriction attributes and their types
    
    Was useful when writing GUPnPDLNA{Foo}Information classes.

 data/restriction_field_types.pl |  110 +++++++++++++++++++++++++++++++++++++++
 1 files changed, 110 insertions(+), 0 deletions(-)
---
diff --git a/data/restriction_field_types.pl b/data/restriction_field_types.pl
new file mode 100755
index 0000000..54ca77a
--- /dev/null
+++ b/data/restriction_field_types.pl
@@ -0,0 +1,110 @@
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+use XML::Parser::Expat;
+
+my %restrictions = ();
+my @restriction_stack = [];
+
+sub start
+{
+    my ($p, $el, %atts) = @_;
+
+    if ($el eq 'restriction')
+    {
+	if (exists ($atts{'type'}))
+	{
+	    my $type = $atts{'type'};
+
+	    unless (exists ($restrictions{$type}))
+	    {
+		$restrictions{$type} = {};
+	    }
+	    push (@restriction_stack, $type);
+	}
+    }
+    elsif ($el eq 'field')
+    {
+	if (exists ($atts{'name'}))
+	{
+	    my $name = $atts{'name'};
+
+	    if (exists ($atts{'type'}))
+	    {
+		my $type = $atts{'type'};
+
+		if (@restriction_stack)
+		{
+		    my $restriction_type = $restriction_stack[-1];
+		    my $fields = $restrictions{$restriction_type};
+
+		    if (exists $fields->{$name})
+		    {
+			if ($fields->{$name} ne $type)
+			{
+			    print STDERR "Field '$name' of '$restriction_type' has different types: $fields->{$name} and $type.\n";
+			}
+		    }
+		    else
+		    {
+			$fields->{$name} = $type;
+		    }
+		}
+		else
+		{
+		    print STDERR "Field '$name' of type '$type' is not a part of restriction.\n";
+		}
+	    }
+	    else
+	    {
+		print STDERR "Field '$name' has no type attribute.\n";
+	    }
+	}
+	else
+	{
+	    print STDERR "Unnamed field.\n";
+	}
+    }
+}
+
+sub end
+{
+    my ($p, $el) = @_;
+
+    if ($el eq 'restriction')
+    {
+	if (@restriction_stack)
+	{
+	    pop (@restriction_stack);
+	}
+	else
+	{
+	    print STDERR "Tried to pop a restriction but stack is empty.\n";
+	}
+    }
+}
+
+foreach my $file (@ARGV)
+{
+    my $parser = XML::Parser::Expat->new ();
+
+    $parser->setHandlers ('Start' => \&start,
+			  'End' => \&end);
+
+    $parser->parsefile ($file);
+    $parser->release ();
+}
+
+foreach my $type (sort (keys (%restrictions)))
+{
+    my $fields = $restrictions{$type};
+
+    print "Restriction type: $type\n";
+    foreach my $field (sort (keys (%{$fields})))
+    {
+	my $field_type = $fields->{$field};
+
+	print "  $field [$field_type]\n";
+    }
+}