GWConquest/Assets/Photon/PhotonBolt/scripts/BoltConsoleWriter.cs

using Microsoft.Win32.SafeHandles;
using System;
using System.IO;
using System.Runtime.InteropServices;
using System.Text;
using UnityEngine;

namespace Bolt {
  public static class ConsoleWriter {
#if UNITY_STANDALONE_WIN
    static class PInvoke {
      public const int STD_OUTPUT_HANDLE = -11;

      [DllImport("kernel32.dll", SetLastError = true)]
      static public extern bool AttachConsole(uint dwProcessId);

      [DllImport("kernel32.dll", SetLastError = true)]
      static public extern bool AllocConsole();

      [DllImport("kernel32.dll", SetLastError = true)]
      static public extern bool FreeConsole();

      [DllImport("kernel32.dll", EntryPoint = "GetStdHandle", SetLastError = true, CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
      static public extern IntPtr GetStdHandle(int nStdHandle);

      [DllImport("kernel32.dll")]
      static public extern bool SetConsoleTitle(string lpConsoleTitle);
    }

    static TextWriter realOut;
#endif

    public static void Open() {
#if UNITY_STANDALONE_WIN
      if (realOut == null) {
        realOut = Console.Out;
      }

      var hasConsole = PInvoke.AttachConsole(0x0ffffffff);
      if (hasConsole == false) {
        PInvoke.AllocConsole();
      }

      try {
        // grab handle ptr
        var outHandlePtr = PInvoke.GetStdHandle(PInvoke.STD_OUTPUT_HANDLE);

        // we can then create a filestream from this handle
#pragma warning disable 0618
        var fileStream = new FileStream(outHandlePtr, FileAccess.Write);
#pragma warning restore 0618

        // and then create a new stream writer (using ASCII) 
        var stdOut = new StreamWriter(fileStream, Encoding.ASCII);
        stdOut.AutoFlush = true;

        // and force unity to use this
        Console.SetOut(stdOut);
      }
      catch (System.Exception e) {
        Debug.Log(e);
      }
#endif
    }

    public static void Close() {
#if UNITY_STANDALONE_WIN
      PInvoke.FreeConsole();

      Console.SetOut(realOut);
      realOut = null;
#endif
    }
  }
}