Protocol Buffer runtime library and 'protoc' plugin

lib/protobuf/runtime/ByteListUtils.dart

+// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+class ByteListUtils {
+  static String toRawBytesAsString(List<int> bytes) {
+    List<String> _bytes = [];
+    for(int b in bytes) {
+      _bytes.add(toHex(b));
+    }
+    return Strings.join(_bytes, " ");
+  }
+
+  static final String HEX_CHARS = "0123456789abcdef";
+  static String toHex(int dec, [int minLength = 2]) {
+    List<int> hexCodes = [];
+    int len = 0;
+    while (len < minLength || dec > 0) {
+      hexCodes.add(HEX_CHARS.charCodeAt(dec & 0xf));
+      dec >>= 4;
+      len ++;
+    }
+    List<int> strSrc = [];
+    for (int i = hexCodes.length - 1; i >= 0; i--) {
+      strSrc.add(hexCodes[i]);
+    }
+    return new String.fromCharCodes(strSrc);
+  }
+
+  static String toBits(int dec, [int minLength = 8]) {
+    Queue<String> q = new Queue();
+    int len = 0;
+    while (len < minLength || dec > 0) {
+      if(len > 0 && len % 4 == 0) q.addFirst(" ");
+      q.addFirst("${dec & 0x1}");
+      dec >>= 1;
+      len ++;
+    }
+    StringBuffer sb = new StringBuffer();
+    for(String i in q) {
+      sb.add(i);
+    }
+    return sb.toString();
+  }
+}