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deps/g3dlite/include/G3D/GUniqueID.h

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+/**
+  \file G3D/GUniqueID.h
+  \author Morgan McGuire, http://graphics.cs.williams.edu
+ */
+#ifndef G3D_GUniqueID_h
+#define G3D_GUniqueID_h
+
+#include "G3D/platform.h"
+#include "G3D/g3dmath.h"
+#include "G3D/Table.h"
+
+namespace G3D {
+     
+class Any;
+    
+/** Globally unique identifiers. The probability of two different
+    programs generating the same value from UniqueID::create is
+    vanishingly small.
+    
+    UniqueIDs optionally contain a 10-bit application specific tag
+    that distinguishes their type.
+*/
+class GUniqueID {
+private:
+
+    uint64 id;
+
+public:
+
+    /** \sa create */
+    GUniqueID() : id(0) {}
+
+    GUniqueID& operator=(const Any& a);
+
+    /** \sa create */
+    GUniqueID(const Any& a) {
+        *this = a;
+    }
+
+    Any toAny() const;
+
+    /** Returns a 16-character string equivalent to this GUniqueID's uint64 value. */
+    std::string toString16() const;
+
+    static GUniqueID fromString16(const std::string& s);
+
+    /** Returns the ID that has the specified tag (so that it is not uninitialized), but
+        which is a common sentinel "none" value. */
+    static GUniqueID NONE(uint16 tag);
+
+    bool uninitialized() const {
+        return id == 0;
+    }
+
+    uint16 tag() const {
+        return id >> 54;
+    }
+
+    operator uint64() const {
+        return id;
+    }    
+
+    bool operator==(const GUniqueID& other) const {
+        return id == other.id;
+    }
+
+    bool operator!=(const GUniqueID& other) const {
+        return id != other.id;
+    }
+
+    void serialize(class BinaryOutput& b) const;
+
+    void deserialize(class BinaryInput& b);
+
+    void serialize(class TextOutput& t) const;
+
+    void deserialize(class TextInput& t);
+
+    /** Create a new ID */
+    static GUniqueID create(uint16 tag = 0);
+};
+
+} // G3D 
+
+/** For Table and Set */
+template<> struct HashTrait<class G3D::GUniqueID> {
+    static size_t hashCode(G3D::GUniqueID id) { return (size_t)(G3D::uint64)id; }
+};
+
+#endif