Introduction to ACF (Another C++ Framework)

//---------------------------------------------------------------------
//
// Copyright (C) 2004 Yingle Jia
//
// Permission to copy, use, modify, sell and distribute this software is 
// granted provided this copyright notice appears in all copies. 
// This software is provided "as is" without express or implied warranty, 
// and with no claim as to its suitability for any purpose.
//

#include "stdafx.h"

namespace Acf {

//---------------------------------------------------------------------
// struct Single
//

// Static Fields

const float Single::DefValue = 0;
const float Single::MaxValue = FLT_MAX;
const float Single::MinValue = FLT_MIN;
const float Single::Epsilon = FLT_EPSILON;

// Static Methods

/*static*/ float Single::Parse(String* s, NumberStyles style)
{
    if (s == null)
        throw ArgumentNullException();

    const wchar_t* format = L"%f";

    float value = 0;
    int ret = swscanf(s->GetCString(), format, &value);
    if (ret == 0 || ret == EOF)
        throw FormatException();

    return value;
}

/*static*/ StringPtr Single::ToString(float value, String* format, 
    IFormatProvider* provider)
{
    wchar_t fmt[10];

    if (format == null || format->Length == 0)
    {
        wcscpy(fmt, L"%g");
    }
    else
    {
        fmt[0] = L'%';
        wcscpy(fmt + 1, format->GetCString());
    }

    wchar_t buf[_MAX_EXP_DIG + _MAX_SIG_DIG + 64];
    swprintf(buf, fmt, (double)value);

    return new String(buf);
}

/*static*/ StringPtr Single::ToString(float value, const wchar_t* format, 
    IFormatProvider* provider)
{
    StringPtr format2 = new String(format);
    return ToString(value, format2, provider);
}

// Methods

StringPtr Single::ToString(String* format, IFormatProvider* provider)
{
    return ToString(this->Value, format, provider);
}

StringPtr Single::ToString(const wchar_t* format, IFormatProvider* provider)
{
    return ToString(this->Value, format, provider);
}

//---------------------------------------------------------------------
// class SingleObject

/*override*/ bool SingleObject::Equals(Object* obj)
{
    SingleObject* o = dynamic_cast<SingleObject*>(obj);
    if (o == null)
        return false;
    else
        return (this->Value == o->Value);
}

/*override*/ int SingleObject::GetHashCode()
{
    return (int) this->Value;
}

/*override*/ StringPtr SingleObject::ToString()
{
    return this->Value.ToString();
}

/*virtual*/ StringPtr SingleObject::ToString(String* format, IFormatProvider* provider)
{
    return this->Value.ToString(format, provider);
}

} // namespace Acf