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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System;
using System.Runtime.InteropServices;
internal static class Program
{
private static int staticInt;
private static unsafe void Main(string[] args)
{
Add(1, 2);
int tempInt = 0;
(*(&tempInt)) = 9;
if(tempInt == 9)
{
PrintLine("Hello from C#!");
}
TwoByteStr str = new TwoByteStr() { first = 1, second = 2 };
TwoByteStr str2 = new TwoByteStr() { first = 3, second = 4 };
if (str2.second == 4)
{
PrintLine("value type int field test: Ok.");
}
staticInt = 5;
if (staticInt == 5)
{
PrintLine("static int field test: Ok.");
}
var not = Not(0xFFFFFFFF) == 0x00000000;
if (not)
{
PrintLine("not test: Ok.");
}
var negInt = Neg(42) == -42;
if (negInt)
{
PrintLine("negInt test: Ok.");
}
var shiftLeft = ShiftLeft(1, 2) == 4;
if (shiftLeft)
{
PrintLine("shiftLeft test: Ok.");
}
var shiftRight = ShiftRight(4, 2) == 1;
if (shiftRight)
{
PrintLine("shiftRight test: Ok.");
}
var unsignedShift = UnsignedShift(0xFFFFFFFFu, 4) == 0x0FFFFFFFu;
if (unsignedShift)
{
PrintLine("unsignedShift test: Ok.");
}
var switchTest0 = SwitchOp(5, 5, 0);
if (switchTest0 == 10)
{
PrintLine("SwitchOp0 test: Ok.");
}
var switchTest1 = SwitchOp(5, 5, 1);
if (switchTest1 == 25)
{
PrintLine("SwitchOp1 test: Ok.");
}
var switchTestDefault = SwitchOp(5, 5, 20);
if (switchTestDefault == 0)
{
PrintLine("SwitchOpDefault test: Ok.");
}
}
private static unsafe void PrintString(string s)
{
int length = s.Length;
fixed (char* curChar = s)
{
for (int i = 0; i < length; i++)
{
TwoByteStr curCharStr = new TwoByteStr();
curCharStr.first = (byte)(*(curChar + i));
printf((byte*)&curCharStr, null);
}
}
}
private static void PrintLine(string s)
{
PrintString(s);
PrintString("\n");
}
private static int Add(int a, int b)
{
return a + b;
}
private static uint Not(uint a)
{
return ~a;
}
private static int Neg(int a)
{
return -a;
}
private static int ShiftLeft(int a, int b)
{
return a << b;
}
private static int ShiftRight(int a, int b)
{
return a >> b;
}
private static uint UnsignedShift(uint a, int b)
{
return a >> b;
}
private static int SwitchOp(int a, int b, int mode)
{
switch(mode)
{
case 0:
return a + b;
case 1:
return a * b;
case 2:
return a / b;
case 3:
return a - b;
default:
return 0;
}
}
[DllImport("*")]
private static unsafe extern int printf(byte* str, byte* unused);
}
public struct TwoByteStr
{
public byte first;
public byte second;
}
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