From 490d24ef415de2a14ea2d657d897ff83595c6bc7 Mon Sep 17 00:00:00 2001
From: David Rose <david@ddrose.com>
Date: Tue, 24 Apr 2007 14:56:23 +0000
Subject: [PATCH] add get_key() method for Python hashing

---
 panda/src/putil/bitMask.I | 12 ++++++++++++
 panda/src/putil/bitMask.h |  2 ++
 2 files changed, 14 insertions(+)

diff --git a/panda/src/putil/bitMask.I b/panda/src/putil/bitMask.I
index 0d07e431e2..a947c2752c 100644
--- a/panda/src/putil/bitMask.I
+++ b/panda/src/putil/bitMask.I
@@ -699,6 +699,18 @@ operator >>= (int shift) {
   _word >>= shift;
 }
 
+////////////////////////////////////////////////////////////////////
+//     Function: BitMask::get_key
+//       Access: Published
+//  Description: Returns a mostly unique integer key per unique
+//               bitmask, suitable for using in a hash table.
+////////////////////////////////////////////////////////////////////
+template<class WType, int nbits>
+INLINE int BitMask<WType, nbits>::
+get_key() const {
+  return (int)_word;
+}
+
 ////////////////////////////////////////////////////////////////////
 //     Function: BitMask::generate_hash
 //       Access: Public
diff --git a/panda/src/putil/bitMask.h b/panda/src/putil/bitMask.h
index dd681e7b40..7de06039f1 100644
--- a/panda/src/putil/bitMask.h
+++ b/panda/src/putil/bitMask.h
@@ -114,6 +114,8 @@ PUBLISHED:
   INLINE void operator <<= (int shift);
   INLINE void operator >>= (int shift);
 
+  INLINE int get_key() const;
+
 public:
   INLINE void generate_hash(ChecksumHashGenerator &hashgen) const;