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

nobu · nobu · commit df61e2aad698 · 2003-04-15T10:12:25.000Z
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@3683 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
diff --git a/ChangeLog b/ChangeLog
@@ -1,3 +1,7 @@
+Tue Apr 15 19:12:21 2003  Nobuyoshi Nakada  <nobu.nokada@softhome.net>
+
+	* struct.c (rb_struct_hash): new methods Struct#hash, Struct#eql?.
+
 Tue Apr 15 16:05:11 2003  Nobuyoshi Nakada  <nobu.nokada@softhome.net>
 
 	* numeric.c (rb_fix2str): buffer was insufficient.
diff --git a/struct.c b/struct.c
@@ -576,6 +576,22 @@ rb_struct_equal(s, s2)
     return Qtrue;
 }
 
+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);
