--- /dev/null
+/* === S Y N F I G ========================================================= */
+/*! \file guid.h
+** \brief Template Header
+**
+** $Id$
+**
+** \legal
+** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
+**
+** This package is free software; you can redistribute it and/or
+** modify it under the terms of the GNU General Public License as
+** published by the Free Software Foundation; either version 2 of
+** the License, or (at your option) any later version.
+**
+** This package is distributed in the hope that it will be useful,
+** but WITHOUT ANY WARRANTY; without even the implied warranty of
+** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+** General Public License for more details.
+** \endlegal
+*/
+/* ========================================================================= */
+
+/* === S T A R T =========================================================== */
+
+#ifndef __SYNFIG_GUID_H
+#define __SYNFIG_GUID_H
+
+/* === H E A D E R S ======================================================= */
+
+#include "string.h"
+#include <stdint.h>
+#include <cassert>
+
+/* === M A C R O S ========================================================= */
+
+/* === T Y P E D E F S ===================================================== */
+
+/* === C L A S S E S & S T R U C T S ======================================= */
+
+namespace synfig {
+
+class GUID
+{
+ union {
+ struct {
+ unsigned int a;
+ unsigned int b;
+ unsigned int c;
+ unsigned int d;
+ } u_32;
+ struct {
+ uint64_t a;
+ uint64_t b;
+ } u_64;
+
+ } data;
+
+public:
+ GUID()
+ { make_unique(); }
+ GUID(const GUID& x):data(x.data)
+ { }
+ GUID(const int i){assert(!i); data.u_64.a=0;data.u_64.b=0;}
+
+ GUID(const String& str);
+
+ static GUID zero() { return GUID(0); }
+ static GUID hasher(const String& str);
+ static GUID hasher(int i);
+
+ operator bool()const { return data.u_32.a||data.u_32.b||data.u_32.c||data.u_32.d; }
+
+ uint64_t get_hi()const { return data.u_64.a; }
+ uint64_t get_lo()const { return data.u_64.b; }
+
+ uint64_t get_hi_hi()const { return data.u_32.a; }
+ uint64_t get_hi_lo()const { return data.u_32.b; }
+ uint64_t get_lo_hi()const { return data.u_32.c; }
+ uint64_t get_lo_lo()const { return data.u_32.d; }
+
+ void make_unique();
+ String get_string()const;
+
+ bool operator==(const GUID& rhs)const
+ { return data.u_64.a==rhs.data.u_64.a && data.u_64.b==rhs.data.u_64.b; }
+ bool operator!=(const GUID& rhs)const
+ { return data.u_64.a!=rhs.data.u_64.a || data.u_64.b!=rhs.data.u_64.b; }
+ bool operator<(const GUID& rhs)const
+ { return (data.u_64.a==rhs.data.u_64.a)?(data.u_64.b<rhs.data.u_64.b):(data.u_64.a<rhs.data.u_64.a); }
+ bool operator>(const GUID& rhs)const
+ { return (data.u_64.a==rhs.data.u_64.a)?(data.u_64.b>rhs.data.u_64.b):(data.u_64.a>rhs.data.u_64.a); }
+ bool operator<=(const GUID& rhs)const
+ { return operator<(rhs) || operator==(rhs); }
+ bool operator>=(const GUID& rhs)const
+ { return operator>(rhs) || operator==(rhs); }
+
+ //! Operator '^' (xor)
+ /*! If A ^ B == C, then C ^ B == A and B ^ A == C.
+ ** Also keep in mind that A ^ A == 0 and A ^ B ^ B = A. */
+ GUID& operator^=(const GUID& rhs)
+ {
+ data.u_32.a^=rhs.data.u_32.a;
+ data.u_32.b^=rhs.data.u_32.b;
+ data.u_32.c^=rhs.data.u_32.c;
+ data.u_32.d^=rhs.data.u_32.d;
+ return *this;
+ }
+ GUID operator^(const GUID& rhs)const { return GUID(*this)^=rhs; }
+
+ //! Operator '%' (alt-xor)
+ /*! A % B != B % A. */
+ GUID& operator%=(const GUID& rhs)
+ {
+ data.u_32.a^=rhs.data.u_32.b;
+ data.u_32.b^=rhs.data.u_32.c;
+ data.u_32.c^=rhs.data.u_32.d;
+ data.u_32.d^=rhs.data.u_32.a;
+ return *this;
+ }
+ GUID operator%(const GUID& rhs)const { return GUID(*this)%=rhs; }
+
+};
+
+class GUIDHash
+{
+public:
+ size_t operator()(const GUID& guid)const
+ {
+ return
+ guid.get_hi_hi()+
+ guid.get_hi_lo()+
+ guid.get_lo_hi()+
+ guid.get_lo_lo();
+ }
+};
+
+};
+
+/* === E N D =============================================================== */
+
+#endif