org.robolectric.res.android.IdmapEntries Maven / Gradle / Ivy

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package org.robolectric.res.android;

import static org.robolectric.res.android.Errors.*;

// transliterated from
// https://android.googlesource.com/platform/frameworks/base/+/android-9.0.0_r12/libs/androidfw/ResourceTypes.cpp
public class IdmapEntries {

  public boolean hasEntries() {
    if (mData == null) {
      return false;
    }

    return (Util.dtohs(mData[0]) > 0);
  }

  //  int byteSize() {
  //    if (mData == null) {
  //      return 0;
  //    }
  //    short entryCount = Util.dtohs(mData[2]);
  //    return (SIZEOF_SHORT * 4) + (SIZEOF_INT * static_cast(entryCount));
  //  }

  byte targetTypeId() {
    if (mData == null) {
      return 0;
    }
    return (byte) Util.dtohs(mData[0]);
  }

  public byte overlayTypeId() {
    if (mData == null) {
      return 0;
    }
    return (byte) Util.dtohs(mData[1]);
  }

  public int lookup(int entryId, Ref outEntryId) {
    short entryCount = Util.dtohs(mData[2]);
    short offset = Util.dtohs(mData[3]);

    if (entryId < offset) {
      // The entry is not present in this idmap
      return BAD_INDEX;
    }

    entryId -= offset;

    if (entryId >= entryCount) {
      // The entry is not present in this idmap
      return BAD_INDEX;
    }

    throw new UnsupportedOperationException("todo"); // todo

    //    // It is safe to access the type here without checking the size because
    //    // we have checked this when it was first loaded.
    ////        final int[] entries = reinterpret_cast(mData) + 2;
    //        final int[] entries = reinterpret_cast(mData) + 2;
    //    int mappedEntry = Util.dtohl(entries[entryId]);
    //    if (mappedEntry == 0xffffffff) {
    //      // This entry is not present in this idmap
    //      return BAD_INDEX;
    //    }
    //        *outEntryId = static_cast(mappedEntry);
    //    return NO_ERROR;
  }

  private short[] mData;
}