Floats Namespace Reference

Classes
struct	FloatComponents
struct	FloatComponents< F32 >
struct	FloatComponents< F64 >

Functions
template<typename Float >
std::string	asString (Float f)

Function Documentation

asString()

template<typename Float >

std::string Floats::asString

(

Float

f

)

Definition at line 84 of file Floats.h.

    {
        FloatComponents<Float> components;
        components.value = f;
    
        auto sign = std::string(components.bits.sign ? "-" : "+");
 
        if(components.bits.exponent == FloatComponents<Float>::maxExponentBits)
        {
            // Handle infinity.
            if(components.bits.significand == 0) { return sign + "infinity"; }
            else
            {
                // Handle NaN.
                char significandString[FloatComponents<Float>::numSignificandHexits + 1];
                for(Uptr hexitIndex = 0;hexitIndex < FloatComponents<Float>::numSignificandHexits;++hexitIndex)
                {
                    auto hexitValue = char((components.bits.significand >> ((FloatComponents<Float>::numSignificandHexits - hexitIndex - 1) * 4)) & 0xf);
                    significandString[hexitIndex] = hexitValue >= 10 ? ('a' + hexitValue - 10) : ('0' + hexitValue);
                }
                significandString[FloatComponents<Float>::numSignificandHexits] = 0;
                return sign + "nan:0x" + significandString + "";
            }
        }
        else
        {
            // If it's not infinite or NaN, just use the STL hexadecimal float printing.
            char buffer[32];
            auto numChars = std::sprintf(buffer,FloatComponents<Float>::numSignificandHexits == 6 ? "%.6a" : "%.13a",f);
            if(unsigned(numChars) + 1 > sizeof(buffer))
            {
                Errors::fatal("not enough space in Floats::asString buffer");
            }
            return buffer;
        }
    }

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