* numeric.c (flo_hash): improve collision. fixed: [ruby-dev:29352]

git-svn-id: http://svn.ruby-lang.org/repos/ruby/branches/ruby_1_8@10864 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

2 files changed, 5 insertions, 1 deletions

diff --git a/ChangeLog b/ChangeLog
index a021df5c3..bc2897a56 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Tue Sep  5 05:56:51 2006  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* numeric.c (flo_hash): improve collision.  fixed: [ruby-dev:29352]
+
 Tue Sep  5 05:49:41 2006  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* file.c (path_check_0): check if sticky bit is set on parent
diff --git a/numeric.c b/numeric.c
index f6f1d3b22..c5e9893c0 100644
--- a/numeric.c
+++ b/numeric.c
@@ -870,7 +870,7 @@ flo_hash(num)
     if (d == 0) d = fabs(d);
     c = (char*)&d;
     for (hash=0, i=0; i<sizeof(double);i++) {
-	hash += c[i] * 971;
+	hash = (hash * 971) ^ (unsigned char)c[i];
     }
     if (hash < 0) hash = -hash;
     return INT2FIX(hash);