Index: src/Makefile
==================================================================
--- src/Makefile
+++ src/Makefile
@@ -3,10 +3,11 @@
 LIB_MINOR = 0
 
 SRCS = array.c		\
        box.c		\
        class.c		\
+       double.c		\
        int.c		\
        map.c		\
        object.c		\
        range.c		\
        refpool.c	\

ADDED   src/double.c
Index: src/double.c
==================================================================
--- /dev/null
+++ src/double.c
@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2012, Jonathan Schleifer <js@webkeks.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "object.h"
+#include "double.h"
+
+struct CFWDouble {
+	CFWObject obj;
+	double value;
+};
+
+static bool
+ctor(void *ptr, va_list args)
+{
+	CFWDouble *double_ = ptr;
+
+	double_->value = va_arg(args, double);
+
+	return true;
+}
+
+static bool
+equal(void *ptr1, void *ptr2)
+{
+	CFWObject *obj2 = ptr2;
+	CFWDouble *double1, *double2;
+
+	if (obj2->cls != cfw_double)
+		return false;
+
+	double1 = ptr1;
+	double2 = ptr2;
+
+	return (double1->value == double2->value);
+}
+
+static uint32_t
+hash(void *ptr)
+{
+	CFWDouble *double_ = ptr;
+
+	/* FIXME: Create a proper hash! */
+	return (uint32_t)double_->value;
+}
+
+static void*
+copy(void *ptr)
+{
+	return cfw_ref(ptr);
+}
+
+double
+cfw_double_value(CFWDouble *double_)
+{
+	return double_->value;
+}
+
+static CFWClass class = {
+	.name = "CFWDouble",
+	.size = sizeof(CFWDouble),
+	.ctor = ctor,
+	.equal = equal,
+	.hash = hash,
+	.copy = copy
+};
+CFWClass *cfw_double = &class;

ADDED   src/double.h
Index: src/double.h
==================================================================
--- /dev/null
+++ src/double.h
@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2012, Jonathan Schleifer <js@webkeks.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __COREFW_DOUBLE_H__
+#define __COREFW_DOUBLE_H__
+
+#include "class.h"
+
+typedef struct CFWDouble CFWDouble;
+extern CFWClass *cfw_double;
+extern double cfw_double_value(CFWDouble*);
+
+#endif