* struct.c (rb_struct_hash): new methods Struct#hash, Struct#eql?.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@3683 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 18 insertions, 0 deletions

diff --git a/struct.c b/struct.c
index 348a89d6af..d695b15caf 100644
--- a/struct.c
+++ b/struct.c
@@ -577,6 +577,22 @@ rb_struct_equal(s, s2)
 }
 
 static VALUE
+rb_struct_hash(s)
+    VALUE s;
+{
+    long i, h;
+    VALUE n;
+
+    h = rb_hash(rb_obj_class(s));
+    for (i = 0; i < RSTRUCT(s)->len; i++) {
+	h = (h << 1) | (h<0 ? 1 : 0);
+	n = rb_hash(RSTRUCT(s)->ptr[i]);
+	h ^= NUM2LONG(n);
+    }
+    return LONG2FIX(h);
+}
+
+static VALUE
 rb_struct_size(s)
     VALUE s;
 {
@@ -596,6 +612,8 @@ Init_Struct()
     rb_define_method(rb_cStruct, "copy_object", rb_struct_copy_object, 1);
 
     rb_define_method(rb_cStruct, "==", rb_struct_equal, 1);
+    rb_define_method(rb_cStruct, "eql?", rb_struct_equal, 1);
+    rb_define_method(rb_cStruct, "hash", rb_struct_hash, 0);
 
     rb_define_method(rb_cStruct, "to_s", rb_struct_to_s, 0);
     rb_define_method(rb_cStruct, "inspect", rb_struct_inspect, 0);