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//
//  By downloading, copying, installing or using the software you agree to this license.
//  If you do not agree to this license, do not download, install,
//  copy or use the software.
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//
//                           License Agreement
//                For Open Source Computer Vision Library
//
// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
// Third party copyrights are property of their respective owners.
//
// Redistribution and use in source and binary forms, with or without modification,
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//M*/


namespace cv
{
    namespace gpu
    {
        namespace device
        {     
            template<class T> struct numeric_limits_gpu
            {	        
                typedef T type;
                __device__ static type min()  { return type(); };            
                __device__ static type max() { return type(); };
                __device__ static type epsilon() { return type(); }
                __device__ static type round_error() { return type(); }
                __device__ static type denorm_min()  { return type(); }
                __device__ static type infinity() { return type(); }
                __device__ static type quiet_NaN() { return type(); }
                __device__ static type signaling_NaN() { return T(); }
                static const bool is_signed;
            };

            template<> struct numeric_limits_gpu<bool>
            {	        
                typedef bool type;
                __device__ static type min() { return false; };            
                __device__ static type max() { return true;  };
                __device__ static type epsilon();
                __device__ static type round_error();
                __device__ static type denorm_min();
                __device__ static type infinity();
                __device__ static type quiet_NaN();
                __device__ static type signaling_NaN();
                static const bool is_signed = false;
            };

            template<> struct numeric_limits_gpu<char>
            {	        
                typedef char type;
                __device__ static type min() { return CHAR_MIN; };            
                __device__ static type max() { return CHAR_MAX; };
                __device__ static type epsilon();
                __device__ static type round_error();
                __device__ static type denorm_min();
                __device__ static type infinity();
                __device__ static type quiet_NaN();
                __device__ static type signaling_NaN();
                static const bool is_signed = (char)-1 == -1;
            };

            template<> struct numeric_limits_gpu<unsigned char>
            {	        
                typedef unsigned char type;
                __device__ static type min() { return 0; };            
                __device__ static type max() { return UCHAR_MAX; };
                __device__ static type epsilon();
                __device__ static type round_error();
                __device__ static type denorm_min();
                __device__ static type infinity();
                __device__ static type quiet_NaN();
                __device__ static type signaling_NaN();
                static const bool is_signed = false;
            };

            template<> struct numeric_limits_gpu<short>
            {	
                typedef short type;
                __device__ static type min() { return SHRT_MIN; };            
                __device__ static type max() { return SHRT_MAX; };
                __device__ static type epsilon();
                __device__ static type round_error();
                __device__ static type denorm_min();
                __device__ static type infinity();
                __device__ static type quiet_NaN();
                __device__ static type signaling_NaN();
                static const bool is_signed = true;
            };

            template<> struct numeric_limits_gpu<unsigned short>
            {	        
                typedef unsigned short type;
                __device__ static type min() { return 0; };            
                __device__ static type max() { return USHRT_MAX; };
                __device__ static type epsilon();
                __device__ static type round_error();
                __device__ static type denorm_min();
                __device__ static type infinity();
                __device__ static type quiet_NaN();
                __device__ static type signaling_NaN();
                static const bool is_signed = false;
            };

            template<> struct numeric_limits_gpu<int>
            {	  
                typedef int type;
                __device__ static type min() { return INT_MIN; };            
                __device__ static type max() { return INT_MAX; };
                __device__ static type epsilon();
                __device__ static type round_error();
                __device__ static type denorm_min();
                __device__ static type infinity();
                __device__ static type quiet_NaN();
                __device__ static type signaling_NaN();
                static const bool is_signed = true;
            };


            template<> struct numeric_limits_gpu<unsigned int>
            {	        
                typedef unsigned int type;
                __device__ static type min() { return 0; };            
                __device__ static type max() { return UINT_MAX; };
                __device__ static type epsilon();
                __device__ static type round_error();
                __device__ static type denorm_min();
                __device__ static type infinity();
                __device__ static type quiet_NaN();
                __device__ static type signaling_NaN();
                static const bool is_signed = false;
            };

            template<> struct numeric_limits_gpu<long>
            {	        
                typedef long type;
                __device__ static type min() { return LONG_MIN; };            
                __device__ static type max() { return LONG_MAX; };
                __device__ static type epsilon();
                __device__ static type round_error();
                __device__ static type denorm_min();
                __device__ static type infinity();
                __device__ static type quiet_NaN();
                __device__ static type signaling_NaN();
                static const bool is_signed = true;
            };

            template<> struct numeric_limits_gpu<unsigned long>
            {	        
                typedef unsigned long type;
                __device__ static type min() { return 0; };            
                __device__ static type max() { return ULONG_MAX; };
                __device__ static type epsilon();
                __device__ static type round_error();
                __device__ static type denorm_min();
                __device__ static type infinity();
                __device__ static type quiet_NaN();
                __device__ static type signaling_NaN();
                static const bool is_signed = false;
            };
                        
            template<> struct numeric_limits_gpu<float>
            {	        
                typedef float type;
                __device__ static type min() { return 1.175494351e-38f/*FLT_MIN*/; };            
                __device__ static type max() { return 3.402823466e+38f/*FLT_MAX*/; };
                __device__ static type epsilon();
                __device__ static type round_error();
                __device__ static type denorm_min();
                __device__ static type infinity();
                __device__ static type quiet_NaN();
                __device__ static type signaling_NaN();
                static const bool is_signed = true;
            };

            template<> struct numeric_limits_gpu<double>
            {	        
                typedef double type;
                __device__ static type min() { return 2.2250738585072014e-308/*DBL_MIN*/; };            
                __device__ static type max() { return 1.7976931348623158e+308/*DBL_MAX*/; };
                __device__ static type epsilon();
                __device__ static type round_error();
                __device__ static type denorm_min();
                __device__ static type infinity();
                __device__ static type quiet_NaN();
                __device__ static type signaling_NaN();
                static const bool is_signed = true;
            };            
        }
    }
}