added HungerOverlayUtils (appleskin)

src/main/java/me/zeroeightsix/kami/util/HungerOverlayUtils.java

@@ -0,0 +1,85 @@
+package me.zeroeightsix.kami.util;
+
+import net.minecraft.entity.player.EntityPlayer;
+import net.minecraft.item.ItemFood;
+import net.minecraft.item.ItemStack;
+import net.minecraft.util.FoodStats;
+import net.minecraftforge.fml.relauncher.ReflectionHelper;
+
+import java.lang.reflect.Field;
+
+public class HungerOverlayUtils {
+    protected static final Field foodExhaustion = ReflectionHelper.findField(FoodStats.class, "foodExhaustionLevel", "field_75126_c");
+
+    public static class BasicFoodValues {
+        public final int hunger;
+        public final float saturationModifier;
+
+        public BasicFoodValues(int hunger, float saturationModifier) {
+            this.hunger = hunger;
+            this.saturationModifier = saturationModifier;
+        }
+
+        public float getSaturationIncrement() {
+            return hunger * saturationModifier * 2f;
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) {
+                return true;
+            }
+
+            if (!(o instanceof BasicFoodValues)) {
+                return false;
+            }
+
+            BasicFoodValues that = (BasicFoodValues) o;
+
+            return hunger == that.hunger && Float.compare(that.saturationModifier, saturationModifier) == 0;
+        }
+
+        @Override
+        public int hashCode() {
+            int result = hunger;
+            result = 31 * result + (saturationModifier != +0.0f ? Float.floatToIntBits(saturationModifier) : 0);
+
+            return result;
+        }
+    }
+
+    public static boolean isFood(ItemStack itemStack)
+    {
+        return itemStack.getItem() instanceof ItemFood;
+    }
+
+    public static BasicFoodValues getDefaultFoodValues(ItemStack itemStack)
+    {
+        ItemFood itemFood = (ItemFood) itemStack.getItem();
+
+        int hunger = itemFood.getHealAmount(itemStack);
+        float saturationModifier = itemFood.getSaturationModifier(itemStack);
+
+        return new BasicFoodValues(hunger, saturationModifier);
+    }
+
+    public static float getMaxExhaustion(EntityPlayer player) {
+        return 4.0f;
+    }
+
+    public static float getExhaustion(EntityPlayer player) {
+        try {
+            return foodExhaustion.getFloat(player.getFoodStats());
+        } catch (IllegalAccessException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public static void setExhaustion(EntityPlayer player, float exhaustion) {
+        try {
+            foodExhaustion.setFloat(player.getFoodStats(), exhaustion);
+        } catch (IllegalAccessException e) {
+            throw new RuntimeException(e);
+        }
+    }
+}