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#ifndef _C_DIGGINS_H_
#define _C_DIGGINS_H_
/*
 * (C) Copyright Christopher Diggins 2005-2011
 * (C) Copyright Pablo Aguilar 2005
 * (C) Copyright Kevlin Henney 2001
 *
 * Distributed under the Boost Software License, Version 1.0. (See
 * accompanying file LICENSE_1_0.txt or copy at
 * http://www.boost.org/LICENSE_1_0.txt
 */

#include <stdexcept>

namespace cdiggins
{
namespace anyimpl
{
    struct bad_any_cast
    {
    };

    struct empty_any
    {
    };

    struct base_any_policy
    {
        virtual void static_delete(void** x) = 0;
        virtual void copy_from_value(void const* src, void** dest) = 0;
        virtual void clone(void* const* src, void** dest) = 0;
        virtual void move(void* const* src, void** dest) = 0;
        virtual const void* get_value_const(void *const *src) const = 0;
        virtual       void* get_value(void **src) = 0;
        virtual size_t get_size() = 0;
    };

    template<typename T>
    struct typed_base_any_policy : base_any_policy
    {
        virtual size_t get_size() { return sizeof(T); }
    };

    template<typename T>
    struct small_any_policy : typed_base_any_policy<T>
    {
        virtual void static_delete(void** x) { }
        virtual void copy_from_value(void const* src, void** dest)
            { new(dest) T(*reinterpret_cast<T const*>(src)); }
        virtual void clone(void* const* src, void** dest) { *dest = *src; }
        virtual void move(void* const* src, void** dest) { *dest = *src; }
        virtual const void* get_value_const(void *const *src) const { return reinterpret_cast<const void*>(src); }
        virtual       void* get_value(void **src) { return reinterpret_cast<void*>(src); }
    };

    template<typename T>
    struct big_any_policy : typed_base_any_policy<T>
    {
        virtual void static_delete(void** x) { if (*x)
            delete(*reinterpret_cast<T**>(x)); *x = nullptr; }
        virtual void copy_from_value(void const* src, void** dest) {
           *dest = new T(*reinterpret_cast<T const*>(src)); }
        virtual void clone(void* const* src, void** dest) {
           *dest = new T(**reinterpret_cast<T* const*>(src)); }
        virtual void move(void* const* src, void** dest) {
          (*reinterpret_cast<T**>(dest))->~T();
          **reinterpret_cast<T**>(dest) = **reinterpret_cast<T* const*>(src); }
        virtual const void* get_value_const(void *const *src) const { return *src; }
        virtual       void* get_value(void **src) { return *src; }
    };

    template<typename T>
    struct choose_policy
    {
        typedef big_any_policy<T> type;
    };

    template<typename T>
    struct choose_policy<T*>
    {
        typedef small_any_policy<T*> type;
    };

    struct any;

    /// Choosing the policy for an any type is illegal, but should never happen.
    /// This is designed to throw a compiler error.
    template<>
    struct choose_policy<any>
    {
        typedef void type;
    };

    /// Specializations for small types.
    #define SMALL_POLICY(TYPE) template<> struct choose_policy<TYPE> { typedef small_any_policy<TYPE> type; };

    SMALL_POLICY(signed char);
    SMALL_POLICY(unsigned char);
    SMALL_POLICY(signed short);
    SMALL_POLICY(unsigned short);
    SMALL_POLICY(signed int);
    SMALL_POLICY(unsigned int);
    SMALL_POLICY(signed long);
    SMALL_POLICY(unsigned long);
    SMALL_POLICY(float);
    SMALL_POLICY(bool);

    #undef SMALL_POLICY

    /// This function will return a different policy for each type.
    template<typename T>
    base_any_policy* get_policy()
    {
        static typename choose_policy<T>::type policy;
        return &policy;
    };
}

struct any
{
private:
    // fields
    anyimpl::base_any_policy* policy;
    void* object;

public:
    /// Initializing constructor.
    template <typename T>
    any(const T& x)
        : policy(anyimpl::get_policy<anyimpl::empty_any>()), object(nullptr)
    {
        assign(x);
    }

    /// Empty constructor.
    any()
        : policy(anyimpl::get_policy<anyimpl::empty_any>()), object(nullptr)
    { }

    /// Special initializing constructor for string literals.
    any(const char* x)
        : policy(anyimpl::get_policy<anyimpl::empty_any>()), object(nullptr)
    {
        assign(x);
    }

    /// Copy constructor.
    any(const any& x)
        : policy(anyimpl::get_policy<anyimpl::empty_any>()), object(nullptr)
    {
        assign(x);
    }

    /// Destructor.
    ~any() {
        policy->static_delete(&object);
    }

    /// Assignment function from another any.
    any& assign(const any& x) {
        reset();
        policy = x.policy;
        policy->clone(&x.object, &object);
        return *this;
    }

    /// Assignment function.
    template <typename T>
    any& assign(const T& x) {
        reset();
        policy = anyimpl::get_policy<T>();
        policy->copy_from_value(&x, &object);
        return *this;
    }

    /// Assignment operator.
    template<typename T>
    any& operator=(const T& x) {
        return assign(x);
    }

    /// Assignment operator, specialed for literal strings.
    /// They have types like const char [6] which don't work as expected.
    any& operator=(const char* x) {
        return assign(x);
    }

    /// Utility functions
    any& swap(any& x) {
        std::swap(policy, x.policy);
        std::swap(object, x.object);
        return *this;
    }

    /// Cast operator. You can only cast to the original type.
    template<typename T>
    const T& constant_cast() const {
        if (policy != anyimpl::get_policy<T>())
            throw anyimpl::bad_any_cast();
        return *(reinterpret_cast<const T*>(policy->get_value_const(&object)));
    }

    template<typename T>
    T& cast() {
        if (policy != anyimpl::get_policy<T>())
            throw anyimpl::bad_any_cast();
        return *(reinterpret_cast<T*>(policy->get_value(&object)));
    }

    /// Returns true if the any contains no value.
    bool empty() const {
        return policy == anyimpl::get_policy<anyimpl::empty_any>();
    }

    /// Frees any allocated memory, and sets the value to nullptr.
    void reset() {
        policy->static_delete(&object);
        policy = anyimpl::get_policy<anyimpl::empty_any>();
    }

    /// Returns true if the two types are the same.
    bool compatible(const any& x) const {
        return policy == x.policy;
    }

    template<typename T>
    bool isType() {
      T temp;
      return compatible(temp);
    }
};
}

#endif

Commits for Divide-Framework/trunk/Source Code/Core/Headers/cdigginsAny.h

Diff revisions: vs.
Revision Author Commited Message
249 Diff Diff k1ngp1n picture k1ngp1n Mon 31 Mar, 2014 20:42:31 +0000

[Ionut] [[BR]]
- Migrated to platform toolset v100 [[BR]]
- Updated boost to 1.55 [[BR]]
- Moved from “NULL” to “nullptr” [[BR]]
- DevIL is now linked dynamically [[BR]]

171 Diff Diff k1ngp1n picture k1ngp1n Sun 03 Nov, 2013 18:15:06 +0000

-Replaced all tabs with spaces [[BR]]

170 Diff Diff k1ngp1n picture k1ngp1n Sun 03 Nov, 2013 17:24:57 +0000

-Moved hardware related code to a separate project [[BR]]
-More work on post-processing: [[BR]]
— HDR rendering is working, but final tonemapping needs more work [[BR]]
-Important changes in BloomPreRenderOperator.cpp, PostFX.cpp and glFrameBufferObject.cpp [[BR]]
-Trailing and leading whitespace cleanups [[BR]]

168 Diff Diff k1ngp1n picture k1ngp1n Sat 26 Oct, 2013 19:03:21 +0000

- Reworked the Camera class[[BR]]
— Now fully quaternion based [[BR]]
— Basic camera types added but not used yet (third person, first person, orbit) [[BR]]
- Cleaned up Material and Texture handling [[BR]]
- Added clipping plane support [[BR]]
— Similar to OpenGL fixed-function clip planes but fully shader driven [[BR]]
— Added a new class, “Plane”, that helps define clip planes [[BR]]
- Optimized the Singleton class to allow faster “getInstance” calls without performance penalties [[BR]]
-- “createInstance” must be called for each singleton class before usage. Or “gerOrCreateInstance” can be used, which is basically the former “getInstance” implementation [[BR]]
- Improved console logging by changing some heap allocations to stack and removing dependencies on the std::string class [[BR]]
- Added a lot of performance optimizations related to coding standards and redundant calculations [[BR]]
— e.g. Frustum AABB check didn’t need to recompute the AABB points as they were calculated already [[BR]]
— e.g. A vector did not need to be set to 0 on initialization as that is already it’s default state on creation [[BR]]
— e.g. Faster Framerate and Timing calculations by using less member variables that are not needed outsied of calling functions [[BR]]
- The SceneState now contains the SceneRenderState and is passed on to the SceneGraph’s update calls [[BR]]
- Better material export/import to/from XML format [[BR]]
- More bug fixes and cleanups [[BR]]

152 Diff Diff k1ngp1n picture k1ngp1n Thu 20 Jun, 2013 14:23:31 +0000

[Ionut] [[BR]]
- New rendering pipeline (experimental and unstable): [[BR]]
— OpenGL 3.x clean context (glLight commands are still used for now, but UBO support is there, but not used yet) [[BR]]
— Custom matrix stacks and UBO based shader data (UBOs cause some link errors on some nVidia cards)[[BR]]
— Multi-threaded texture loading and shader compilation (mt shader compilation disabled for now. needs more tests) [[BR]]
— VAO rendering is self contained (no more enable/disable calls before a draw request) [[BR]]
— Render instance class used for rendering information [[BR]]
[[BR]]
- New unique ID generation base class: GUIDWrapper. Each class that derives from this, gets an application wide unique id on construction [[BR]]
- Added base code for an in-game editor using CEGUI [[BR]]
- Replaced some mutex locks with lockless data structures or atomic data [[BR]]
- CEGUI 0.8.2, FTGL-GL3 and GLIM 0.4 modified to support GLEW_MX if defined [[BR]]
- Dropped VS2008 support [[BR]]
- Networking library, server framework and ReCast files are now projects inside the Divide Framework solution [[BR]]
- New console command “setFov” that modifies the horizontal FoV value in realtime [[BR]]
- New console command “recompileShader” that reparses shader files, recompiles shaders and relinks shader programs who’s names match or contain the argument string [[BR]]
- New debug utility: axis angle drawn in corner of the screen if needed [[BR]]
- More ‘const’-s pasted around the code, more loop performance tweaks (allocations before a loop, tighter loops, etc), more utility member functions added to various classes [[BR]]

148 k1ngp1n picture k1ngp1n Sun 14 Apr, 2013 23:07:58 +0000

[Ionut] [[BR]]
- Changed the ParamHandler from using “boost::any” to the more faster “cdiggins::any”. More info here: http://bit.ly/YVGa9X [[BR]]
- Disabled mutexes from BoundingBox. Thread safety should be applied from a higher level [[BR]]
- Fixed a bug with important light selection for scene nodes [[BR]]
- Fixed a bug with material cache involving bump maps [[BR]]
- Fixed a bug with priority vertex properties for GLSL shaders [[BR]]