1 files changed, 38 insertions, 0 deletions
diff --git a/src/main/java/util/Util.java b/src/main/java/util/Util.java
index 6a56dfa8aa..17bcf2b841 100644
--- a/src/main/java/util/Util.java
+++ b/src/main/java/util/Util.java
@@ -1,8 +1,14 @@
 package util;
 
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.math.RoundingMode;
+import java.text.DecimalFormat;
+import java.text.DecimalFormatSymbols;
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
+import java.util.Locale;
 
 import net.minecraft.item.ItemStack;
 import net.minecraftforge.fluids.FluidStack;
@@ -12,6 +18,17 @@ import common.items.ErrorItem;
 
 public class Util {
 
+    protected static final DecimalFormat percentFormatRound_6 = new DecimalFormat("0.000000%");
+    protected static final DecimalFormat percentFormatRound_2 = new DecimalFormat("0.00%");
+    protected static final BigDecimal Threshold_1 = BigDecimal.valueOf(0.01);
+    protected static DecimalFormat standardFormat;
+
+    static {
+        DecimalFormatSymbols dfs = new DecimalFormatSymbols(Locale.US);
+        dfs.setExponentSeparator("x10^");
+        standardFormat = new DecimalFormat("0.00E0", dfs);
+    }
+
     public static ItemStack getStackofAmountFromOreDict(String oredictName, final int amount) {
         final ArrayList<ItemStack> list = OreDictionary.getOres(oredictName);
         if (!list.isEmpty()) {
@@ -48,4 +65,25 @@ public class Util {
         }
         return ret;
     }
+
+    /* If the number is less than 1, we round by the 6, otherwise to 2 */
+    public static String toPercentageFrom(BigInteger value, BigInteger maxValue) {
+        BigDecimal result = new BigDecimal(value).setScale(6, RoundingMode.HALF_UP)
+                .divide(new BigDecimal(maxValue), RoundingMode.HALF_UP);
+        if (result.compareTo(Threshold_1) < 0) {
+            return percentFormatRound_6.format(result);
+        } else {
+            return percentFormatRound_2.format(result);
+        }
+    }
+
+    /* Get a string like this: 4.56*10^25 */
+    public static String toStandardForm(BigInteger number) {
+        if (BigInteger.ZERO.equals(number)) {
+            return "0";
+        }
+
+        return standardFormat.format(number);
+    }
+
 }