The final restructured version for automatic build using maven tycho

[Mograsim.git] / tests / net.mograsim.logic.model.am2900.tests / src / net / mograsim / logic / model / am2900 / util / TestUtil.java

diff --git a/tests/net.mograsim.logic.model.am2900.tests/src/net/mograsim/logic/model/am2900/util/TestUtil.java b/tests/net.mograsim.logic.model.am2900.tests/src/net/mograsim/logic/model/am2900/util/TestUtil.java
new file mode 100644 (file)
index 0000000..5989dfb
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+++ b/tests/net.mograsim.logic.model.am2900.tests/src/net/mograsim/logic/model/am2900/util/TestUtil.java
@@ -0,0 +1,100 @@
+package net.mograsim.logic.model.am2900.util;
+
+import net.mograsim.logic.core.types.Bit;
+import net.mograsim.logic.core.types.BitVector;
+import net.mograsim.logic.core.types.BitVector.BitVectorMutator;
+
+public final class TestUtil
+{
+       private TestUtil()
+       {
+
+       }
+
+       /**
+        * Transforms the last four bits of an int to a string that contains the binary ('1' and '0') representation of the 4 bits
+        * 
+        * @author Christian Femers
+        */
+       public static String to4bitBin(int x)
+       {
+               StringBuilder sb = new StringBuilder(4);
+               sb.append((x & 0b1000) == 0 ? '0' : '1');
+               sb.append((x & 0b0100) == 0 ? '0' : '1');
+               sb.append((x & 0b0010) == 0 ? '0' : '1');
+               sb.append((x & 0b0001) == 0 ? '0' : '1');
+               return sb.toString();
+       }
+
+       /**
+        * Transforms the given boolean to a string that contains the binary ('1' and '0') representation of the bit
+        * 
+        * @author Christian Femers
+        */
+       public static String to1bitBin(boolean bitIsSet)
+       {
+               return bitIsSet ? "1" : "0";
+       }
+
+       /**
+        * Transforms the given int to a string that contains the binary ('1' and '0') representation of the int. "0" is only returned when the
+        * int is equal to zero.
+        * 
+        * @author Christian Femers
+        */
+       public static String to1bitBin(int someInt)
+       {
+               return someInt != 0 ? "1" : "0";
+       }
+
+       /**
+        * Transforms a 4 bit signed integer (-8 to 7) to a int representing the same number. (Adding leading 1-bits if the 4 bit int is
+        * negative)
+        * 
+        * @author Christian Femers
+        */
+       public static int signed4ToSigned32(int signed4bit)
+       {
+               if ((signed4bit & 0b1000) > 0)
+                       return signed4bit | 0xFF_FF_FF_F0;
+               return signed4bit & 0x00_00_00_0F;
+       }
+
+       /**
+        * Transforms a 16 bit signed integer (-32768 to 32767 - a short) to a int representing the same number. (Adding leading 1-bits if the
+        * 16 bit int is negative)
+        * 
+        * @author Christian Femers
+        */
+       public static int signed16ToSigned32(int signed16bit)
+       {
+               return (short) signed16bit;
+       }
+
+       /**
+        * Transforms the last n bits of an int to a string that contains the binary ('1' and '0') representation of the n bits
+        * 
+        * @author Christian Femers
+        */
+       public static String toNbitString(int x, int n)
+       {
+               StringBuilder sb = new StringBuilder(n);
+               for (int i = 0; i < n; i++)
+               {
+                       sb.append((x >> i) & 1);
+               }
+               return sb.reverse().toString();
+       }
+
+       public static BitVector of(int value, int length)
+       {
+               BitVectorMutator mutator = BitVectorMutator.ofLength(length);
+               int val = value;
+               for (int i = length - 1; i >= 0; i--)
+               {
+                       mutator.setMSBit(i, Bit.lastBitOf(val));
+                       val >>>= 1;
+               }
+               return mutator.toBitVector();
+       }
+}