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#region

/* -----------------------------------------------------------------------

 * <copyright file="SizeExtensions.cs" company="GRNet">

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#endregion

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace Pithos.Client.WPF.FileProperties

{

    public static class SizeExtensions

    {

        static readonly string[] SizeSuffixes = { 

        "B", "KB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB" };

        public static string ToByteSize(this long size)

        {

            const string formatTemplate = "{0}{1:0.#} {2}";

            if (size == 0)

            {

                return string.Format(formatTemplate, null, 0, SizeSuffixes[0]);

            }

            var absSize = Math.Abs((double)size);

            var fpPower = Math.Log(absSize, 1000);

            var intPower = (int)fpPower;

            var iUnit = intPower >= SizeSuffixes.Length

                ? SizeSuffixes.Length - 1

                : intPower;

            var normSize = absSize / Math.Pow(1000, iUnit);

            return string.Format(

                formatTemplate,

                size < 0 ? "-" : null, normSize, SizeSuffixes[iUnit]);

        } 

    }

}