mcs/tests/test-400.cs

   1 // Compiler options: -unsafe
   2
   3 //
   4 // Tests unsafe operators.  address-of, dereference, member access
   5 //
   6 using System;
   7
   8 unsafe struct Y {
   9         public int a;
  10         public int s;
  11 }
  12
  13 unsafe class X {
  14         static int TestDereference ()
  15         {
  16                 Y y;
  17                 Y *z;
  18                 Y a;
  19
  20                 z = &y;
  21                 y.a = 1;
  22                 y.s = 2;
  23
  24                 a.a = z->a;
  25                 a.s = z->s;
  26
  27                 if (a.a != y.a)
  28                         return 1;
  29                 if (a.s != y.s)
  30                         return 2;
  31
  32                 return 0;
  33         }
  34
  35         static int TestPtrAdd ()
  36         {
  37                 int [] a = new int [10];
  38                 int i;
  39
  40                 for (i = 0; i < 10; i++)
  41                         a [i] = i;
  42
  43                 i = 0;
  44                 fixed (int *b = &a [0]){
  45                         int *p = b;
  46
  47                         for (i = 0; i < 10; i++){
  48                                 if (*p != a [i])
  49                                         return 10+i;
  50                                 p++;
  51                         }
  52                 }
  53                 return 0;
  54         }
  55
  56         static int i = 1;
  57         static char c = 'a';
  58         static long l = 123;
  59         static double d = 1.2;
  60         static float f = 1.3F;
  61         static short s = 4;
  62
  63         static int TestPtrAssign ()
  64         {
  65
  66                 fixed (int *ii = &i){
  67                         *ii = 10;
  68                 }
  69
  70                 fixed (char *cc = &c){
  71                         *cc = 'b';
  72                 }
  73
  74                 fixed (long *ll = &l){
  75                         *ll = 100;
  76                 }
  77
  78                 fixed (double *dd = &d){
  79                         *dd = 3.0;
  80                 }
  81
  82                 fixed (float *ff = &f){
  83                         *ff = 1.2F;
  84                 }
  85
  86                 fixed (short *ss = &s){
  87                         *ss = 102;
  88                 }
  89
  90                 if (i != 10)
  91                         return 100;
  92                 if (c != 'b')
  93                         return 101;
  94                 if (l != 100)
  95                         return 102;
  96                 if (d != 3.0)
  97                         return 103;
  98                 if (f != 1.2F)
  99                         return 104;
 100                 if (s != 102)
 101                         return 105;
 102                 return 0;
 103         }
 104
 105         static int TestPtrArithmetic ()
 106         {
 107                 char [] array = new char [10];
 108                 char *pb;
 109
 110                 array [5] = 'j';
 111                 fixed (char *pa = array){
 112                         pb = pa + 1;
 113
 114
 115                         //
 116                         // This one tests pointer element access
 117                         //
 118                         if (pa [5] != 'j')
 119                                 return 199;
 120
 121                         Console.WriteLine ("V: " + (pb - pa));
 122                         if ((pb - pa) != 1)
 123                                 return 200;
 124
 125                         pb++;
 126
 127                         if (pb == pa)
 128                                 return 201;
 129                         if (pb < pa)
 130                                 return 202;
 131                         if (pa > pb)
 132                                 return 203;
 133                         if (pa >= pb)
 134                                 return 204;
 135                         if (pb <= pa)
 136                                 return 205;
 137                         pb = pb - 2;
 138                         if (pb != pa){
 139                                 Console.WriteLine ("VV: " + (pb - pa));
 140                                 return 206;
 141                         }
 142                 }
 143
 144                 return 0;
 145         }
 146
 147         static int TestMultiple ()
 148         {
 149                 char [] array = new char [10];
 150                 int count = 0;
 151
 152                 fixed (char *pa = array, pb = array){
 153                         count++;
 154                 }
 155                 if (count != 1)
 156                         return 300;
 157                 return 0;
 158         }
 159
 160         public static int Main ()
 161         {
 162                 int v;
 163
 164                 if ((v = TestDereference ()) != 0)
 165                         return v;
 166
 167                 if ((v = TestPtrAdd ()) != 0)
 168                         return v;
 169
 170                 if ((v = TestPtrAssign ()) != 0)
 171                         return v;
 172
 173                 if ((v = TestPtrArithmetic ()) != 0)
 174                         return v;
 175
 176                 if ((v = TestMultiple ()) != 0)
 177                         return v;
 178
 179                 Console.WriteLine ("Ok");
 180                 return 0;
 181         }
 182 }