Push more utilities and UUID stuff

lib/nbt/Stream.dart

@@ -283,4 +283,74 @@ class ByteLayer {
     int value = readLong();
     return (value >> 1) ^ (-(value & 1));
   }
+
+  void writeBytes(Iterable<int> bytes) {
+    for (int byte in bytes) {
+      writeByte(byte);
+    }
+  }
+
+  List<int> readBytes(int num) {
+    List<int> lst = [];
+    for (int i = 0; i < num; i++) {
+      lst.add(readByte());
+    }
+
+    return lst;
+  }
+
+  void setBit(int position, int maskToSet) {
+    if (position < _byteBuffer.length) {
+      // Set the value now
+      seek(position);
+      int current = readByte();
+      seek(position);
+      current |= maskToSet;
+      writeByte(current);
+    }
+  }
+
+  void clearBit(int position, int maskToClear) {
+    if (position < _byteBuffer.length) {
+      // Lets clear the bit
+      seek(position);
+      int current = readByte();
+      current &= maskToClear;
+      seek(position);
+      writeByte(current);
+    }
+  }
+
+  bool checkBit(int position, int mask) {
+    if (position < _byteBuffer.length) {
+      seek(position);
+      int current = readByte();
+      return (current & mask) == mask;
+    } else
+      return false;
+  }
+
+  int getBit(int position) {
+    if (position < _byteBuffer.length) {
+      seek(position);
+      return readByte();
+    } else
+      return 0;
+  }
+
+  void seek(int position) {
+    _position = 0;
+    _ensureCapacity(position);
+    _position = position;
+  }
+
+  void waitSetBit(int position, int maskToClear, int maskToSet) {
+    clearBit(position, maskToClear);
+    setBit(position, maskToSet);
+
+    while (!checkBit(position, maskToSet)) {
+      clearBit(position, maskToClear);
+      setBit(position, maskToSet);
+    }
+  }
 }