67 lines
1.1 KiB
C#
67 lines
1.1 KiB
C#
// Compiler options: -unsafe
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using System;
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class PointerArithmeticTest
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{
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unsafe public static int Main()
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{
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try {
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return CheckAdd((byte*)(-1), -1);
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} catch (System.OverflowException) {}
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try {
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if (IntPtr.Size <= 4)
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return CheckSub((short*)(-1), int.MaxValue);
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else
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return CheckSub((short*)(-1), long.MaxValue);
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} catch (System.OverflowException) {}
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CheckSub2((short*)(-1), int.MaxValue);
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if ((long)Conversions (long.MaxValue) != (IntPtr.Size <= 4 ? uint.MaxValue : long.MaxValue))
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return 5;
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Console.WriteLine ("OK");
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return 0;
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}
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unsafe static int* Conversions (long b)
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{
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return (int*)b;
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}
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unsafe static int CheckAdd(byte* ptr, int offset)
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{
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if (checked(ptr + offset < ptr))
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return 1;
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return 101;
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}
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unsafe static int CheckSub(short* ptr, int offset)
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{
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if (checked(ptr - offset < ptr))
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return 2;
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return 102;
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}
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unsafe static int CheckSub(short* ptr, long offset)
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{
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if (checked(ptr - offset < ptr))
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return 2;
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return 102;
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}
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unsafe static int CheckSub2(short* ptr, int offset)
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{
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short* b = ptr + offset;
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if (checked(ptr - b < 0))
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return 3;
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return 0;
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}
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}
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