mono/tests/marshal2.cs

   1 //
   2 // Tests for Marshal.StructureToPtr and PtrToStructure
   3 //
   4
   5 using System;
   6 using System.Runtime.InteropServices;
   7
   8 public class Test {
   9
  10
  11         [StructLayout (LayoutKind.Sequential)]
  12         public class SimpleObj {
  13                 public int a;
  14                 public int b;
  15
  16                 public void test () {}
  17         }
  18
  19         [StructLayout (LayoutKind.Sequential)]
  20         public struct SimpleStruct2 {
  21                 public int a;
  22                 public int b;
  23         }
  24
  25         [StructLayout (LayoutKind.Sequential, CharSet=CharSet.Ansi)]
  26         public struct SimpleStruct {
  27                 public int a;
  28                 public bool bool1;
  29                 public bool bool2;
  30                 public int b;
  31                 [MarshalAs (UnmanagedType.ByValArray, SizeConst=2)] public short[] a1;
  32                 [MarshalAs (UnmanagedType.ByValTStr, SizeConst=4)] public string s1;
  33                 public SimpleStruct2 emb1;
  34                 public SimpleObj emb2;
  35                 public string s2;
  36                 public double x;
  37                 [MarshalAs (UnmanagedType.ByValArray, SizeConst=2)] public char[] a2;
  38         }
  39
  40         [StructLayout (LayoutKind.Sequential, CharSet=CharSet.Unicode)]
  41         public struct ByValWStrStruct {
  42                 [MarshalAs (UnmanagedType.ByValTStr, SizeConst=4)] public string s1;
  43                 public int i;
  44         }
  45
  46         public unsafe static int Main () {
  47                 SimpleStruct ss = new SimpleStruct ();
  48                 int size = Marshal.SizeOf (typeof (SimpleStruct));
  49
  50                 //if (size != 52)
  51                 //return 1;
  52
  53                 IntPtr p = Marshal.AllocHGlobal (size);
  54                 ss.a = 1;
  55                 ss.bool1 = true;
  56                 ss.bool2 = false;
  57                 ss.b = 2;
  58                 ss.a1 = new short [2];
  59                 ss.a1 [0] = 6;
  60                 ss.a1 [1] = 5;
  61                 ss.s1 = "abcd";
  62                 ss.emb1 = new SimpleStruct2 ();
  63                 ss.emb1.a = 3;
  64                 ss.emb1.b = 4;
  65                 ss.emb2 = new SimpleObj ();
  66                 ss.emb2.a = 10;
  67                 ss.emb2.b = 11;
  68                 ss.s2 = "just a test";
  69                 ss.x = 1.5;
  70                 ss.a2 = new char [2];
  71                 ss.a2 [0] = 'a';
  72                 ss.a2 [1] = 'b';
  73
  74                 Marshal.StructureToPtr (ss, p, false);
  75                 Type t = ss.GetType ();
  76
  77                 if (Marshal.ReadInt32 (p, (int)Marshal.OffsetOf (t, "a")) != 1)
  78                         return 1;
  79                 if (Marshal.ReadInt32 (p, (int)Marshal.OffsetOf (t, "bool1")) != 1)
  80                         return 2;
  81                 if (Marshal.ReadInt32 (p, (int)Marshal.OffsetOf (t, "bool2")) != 0)
  82                         return 3;
  83                 if (Marshal.ReadInt32 (p, (int)Marshal.OffsetOf (t, "b")) != 2)
  84                         return 4;
  85                 if (Marshal.ReadInt16 (p, 16) != 6)
  86                         return 5;
  87                 if (Marshal.ReadInt16 (p, 18) != 5)
  88                         return 6;
  89                 if (Marshal.ReadByte (p, 20) != 97)
  90                         return 7;
  91                 if (Marshal.ReadByte (p, 21) != 98)
  92                         return 8;
  93                 if (Marshal.ReadByte (p, 22) != 99)
  94                         return 9;
  95                 if (Marshal.ReadByte (p, 23) != 0)
  96                         return 10;
  97                 if (Marshal.ReadInt32 (p, 24) != 3)
  98                         return 11;
  99                 if (Marshal.ReadInt32 (p, 28) != 4)
 100                         return 12;
 101                 if (Marshal.ReadInt32 (p, 32) != 10)
 102                         return 13;
 103                 if (Marshal.ReadInt32 (p, 36) != 11)
 104                         return 14;
 105                 if (Marshal.ReadByte (p, (int)Marshal.OffsetOf (t, "a2")) != 97)
 106                         return 15;
 107                 if (Marshal.ReadByte (p, (int)Marshal.OffsetOf (t, "a2") + 1) != 98)
 108                         return 16;
 109
 110                 SimpleStruct cp = (SimpleStruct)Marshal.PtrToStructure (p, ss.GetType ());
 111
 112                 if (cp.a != 1)
 113                         return 16;
 114
 115                 if (cp.bool1 != true)
 116                         return 17;
 117
 118                 if (cp.bool2 != false)
 119                         return 18;
 120
 121                 if (cp.b != 2)
 122                         return 19;
 123
 124                 if (cp.a1 [0] != 6)
 125                         return 20;
 126
 127                 if (cp.a1 [1] != 5)
 128                         return 21;
 129
 130                 if (cp.s1 != "abc")
 131                         return 22;
 132
 133                 if (cp.emb1.a != 3)
 134                         return 23;
 135
 136                 if (cp.emb1.b != 4)
 137                         return 24;
 138
 139                 if (cp.emb2.a != 10)
 140                         return 25;
 141
 142                 if (cp.emb2.b != 11)
 143                         return 26;
 144
 145                 if (cp.s2 != "just a test")
 146                         return 27;
 147
 148                 if (cp.x != 1.5)
 149                         return 28;
 150
 151                 if (cp.a2 [0] != 'a')
 152                         return 29;
 153
 154                 if (cp.a2 [1] != 'b')
 155                         return 30;
 156
 157                 /* ByValTStr with Unicode */
 158                 ByValWStrStruct s = new ByValWStrStruct ();
 159
 160                 IntPtr p2 = Marshal.AllocHGlobal (Marshal.SizeOf (typeof (ByValWStrStruct)));
 161                 Marshal.StructureToPtr(s, p2, false);
 162
 163                 /* Check that the ByValWStr is initialized correctly */
 164                 for (int i = 0; i < 8; ++i)
 165                         if (Marshal.ReadByte (p2, i) != 0)
 166                                 return 31;
 167
 168                 s.s1 = "ABCD";
 169                 s.i = 55;
 170
 171                 Marshal.StructureToPtr(s, p2, false);
 172
 173                 ByValWStrStruct s2 = (ByValWStrStruct)Marshal.PtrToStructure (p2, typeof (ByValWStrStruct));
 174
 175                 /* The fourth char is lost because of null-termination */
 176                 if (s2.s1 != "ABC")
 177                         return 32;
 178
 179                 if (s2.i != 55)
 180                         return 33;
 181
 182                 return 0;
 183         }
 184 }
 185