Update #48 - Added some features from OptiFine

sources/main/java/net/optifine/config/MatchBlock.java

@@ -0,0 +1,61 @@
+package net.optifine.config;
+
+import net.minecraft.block.state.BlockStateBase;
+import net.optifine.Config;
+
+public class MatchBlock {
+	private int blockId = -1;
+	private int[] metadatas = null;
+
+	public MatchBlock(int blockId) {
+		this.blockId = blockId;
+	}
+
+	public MatchBlock(int blockId, int metadata) {
+		this.blockId = blockId;
+
+		if (metadata >= 0 && metadata <= 15) {
+			this.metadatas = new int[] { metadata };
+		}
+	}
+
+	public MatchBlock(int blockId, int[] metadatas) {
+		this.blockId = blockId;
+		this.metadatas = metadatas;
+	}
+
+	public int getBlockId() {
+		return this.blockId;
+	}
+
+	public int[] getMetadatas() {
+		return this.metadatas;
+	}
+
+	public boolean matches(BlockStateBase blockState) {
+		return blockState.getBlockId() != this.blockId ? false
+				: Matches.metadata(blockState.getMetadata(), this.metadatas);
+	}
+
+	public boolean matches(int id, int metadata) {
+		return id != this.blockId ? false : Matches.metadata(metadata, this.metadatas);
+	}
+
+	public void addMetadata(int metadata) {
+		if (this.metadatas != null) {
+			if (metadata >= 0 && metadata <= 15) {
+				for (int i = 0; i < this.metadatas.length; ++i) {
+					if (this.metadatas[i] == metadata) {
+						return;
+					}
+				}
+
+				this.metadatas = Config.addIntToArray(this.metadatas, metadata);
+			}
+		}
+	}
+
+	public String toString() {
+		return "" + this.blockId + ":" + Config.arrayToString(this.metadatas);
+	}
+}