Support multiple relation test without logic and (python-like)

Like: 
  a == b == c 
  or 
  a < b <= c <= d < e 

Real life example:
  6660 <= tcp.port <= 6669

Just syntactic sugar, this is *NOT* optimized.

svn path=/trunk/; revision=43353

1 files changed, 14 insertions, 0 deletions

diff --git a/epan/dfilter/sttype-range.c b/epan/dfilter/sttype-range.c
index 98d1930cb9..1bc7bfe00a 100644
--- a/epan/dfilter/sttype-range.c
+++ b/epan/dfilter/sttype-range.c
@@ -59,6 +59,19 @@ range_new(gpointer junk)
 	return (gpointer) range;
 }
 
+static gpointer
+range_dup(gconstpointer data)
+{
+	const range_t *org = data;
+	range_t       *range;
+
+	range = range_new(NULL);
+	range->hfinfo = org->hfinfo;
+	range->drange = drange_dup(org->drange);
+
+	return (gpointer) range;
+}
+
 static void
 range_free(gpointer value)
 {
@@ -116,6 +129,7 @@ sttype_register_range(void)
 		"RANGE",
 		range_new,
 		range_free,
+		range_dup
 	};
 
 	sttype_register(&range_type);