Utils.cs

using System;

namespace IoMonitor
{
    /// <summary>
    /// Generic formatting helpers used by the console UI.
    /// </summary>
    internal static partial class Program
    {
        /// <summary>
        /// Formats a byte quantity into a human-friendly string (KB, MB, GB, ...).
        /// </summary>
        private static string FormatBytes(long bytes)
        {
            if (bytes == 0)
            {
                return "0 B";
            }

            string[] sizes = { "B", "KB", "MB", "GB", "TB" };
            int order = 0;
            double value = bytes;

            while (value >= 1024 && order < sizes.Length - 1)
            {
                order++;
                value /= 1024;
            }

            return $"{value:N2} {sizes[order]}";
        }

        /// <summary>
        /// Formats a count of operations into a compact string (e.g. "1.2K", "3.4M").
        /// </summary>
        private static string FormatOps(long ops)
        {
            if (ops == 0)
            {
                return "0";
            }

            if (ops < 1000)
            {
                return ops.ToString();
            }

            if (ops < 1_000_000)
            {
                return $"{ops / 1000.0:F1}K";
            }

            return $"{ops / 1_000_000.0:F1}M";
        }
    }
}