+++ /dev/null
-package net.mograsim.logic.ui.am2900;
-
-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();
- }
-}