content: /*
   * Copyright (C) 2018 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package androidx.test.ext.truth.internal;
  
  import androidx.annotation.RestrictTo;
  import androidx.annotation.RestrictTo.Scope;
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * Utility class for asserting flag values
   *
   * @hide
   */
  @RestrictTo(Scope.LIBRARY)
  public final class FlagUtil {
  
    private FlagUtil() {}
  
    /**
     * Builds list of specified flags as hex strings, intended for building readable error messages
     * for flag assets.
     *
     * @hide
     */
    @RestrictTo(Scope.LIBRARY)
    public static List<String> flagNames(int flags) {
      List<String> flagStrings = new ArrayList<>();
      for (int i = 0; i < 32; i++) {
        int flagValue = 1 << i;
        if ((flags & flagValue) == flagValue) {
          flagStrings.add(String.format("0x%x", flagValue));
        }
      }
      return flagStrings;
    }
  }
  