BeatSaber-IPA-Reloaded/IllusionInjector/ConsoleWindow.cs

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

namespace Windows
{

    class GuiConsole 
    { 
        public static void CreateConsole() 
        { 
            if (hasConsole) 
                    return; 
            if (oldOut == IntPtr.Zero) 
                    oldOut = GetStdHandle( -11 ); 
            if (! AllocConsole()) 
                    throw new Exception("AllocConsole() failed"); 
            conOut = CreateFile( "CONOUT$", 0x40000000, 2, IntPtr.Zero, 3, 0, IntPtr.Zero ); 
            if (! SetStdHandle(-11, conOut)) 
                    throw new Exception("SetStdHandle() failed"); 
            StreamToConsole(); 
            hasConsole = true;
        } 
        public static void ReleaseConsole() 
        { 
            if (! hasConsole) 
                    return; 
            if (! CloseHandle(conOut)) 
                    throw new Exception("CloseHandle() failed"); 
            conOut = IntPtr.Zero; 
            if (! FreeConsole()) 
                    throw new Exception("FreeConsole() failed"); 
            if (! SetStdHandle(-11, oldOut)) 
                    throw new Exception("SetStdHandle() failed"); 
            StreamToConsole(); 
            hasConsole = false; 
        } 
        private static void StreamToConsole() 
        { 
            Stream cstm = Console.OpenStandardOutput(); 
            StreamWriter cstw = new StreamWriter( cstm, Encoding.Default ); 
            cstw.AutoFlush = true; 
            Console.SetOut( cstw ); 
            Console.SetError( cstw ); 
        } 
        private static bool hasConsole = false; 
        private static IntPtr conOut; 
        private static IntPtr oldOut; 
        [DllImport("kernel32.dll", SetLastError=true)]
        private static extern bool AllocConsole(); 
        [DllImport("kernel32.dll", SetLastError=false)]
        private static extern bool FreeConsole(); 
        [DllImport("kernel32.dll", SetLastError=true)] 
        private static extern IntPtr GetStdHandle( int nStdHandle ); 
        [DllImport("kernel32.dll", SetLastError=true)]
        private static extern bool SetStdHandle(int nStdHandle, IntPtr hConsoleOutput); 
        [DllImport("kernel32.dll", CharSet=CharSet.Auto, SetLastError=true)]
        private static extern IntPtr CreateFile( 
                string          fileName, 
                int             desiredAccess, 
                int             shareMode, 
                IntPtr          securityAttributes, 
                int             creationDisposition, 
                int             flagsAndAttributes, 
                IntPtr          templateFile ); 
        [DllImport("kernel32.dll", ExactSpelling=true, SetLastError=true)]
        private static extern bool CloseHandle(IntPtr handle); 
    } 
}