private void extractDsoImpl()

in java/com/facebook/soloader/UnpackingSoSource.java [282:318]
35 lines of code
9 McCabe index (conditional complexity)

  private void extractDsoImpl(InputDso iDso, byte[] ioBuffer) throws IOException {
    File dsoFileName = new File(soDirectory, iDso.getFileName());
    RandomAccessFile dsoFile = null;
    try {
      if (dsoFileName.exists() && !dsoFileName.setWritable(true)) {
        Log.w(TAG, "error adding write permission to: " + dsoFileName);
      }

      try {
        dsoFile = new RandomAccessFile(dsoFileName, "rw");
      } catch (IOException ex) {
        Log.w(TAG, "error overwriting " + dsoFileName + " trying to delete and start over", ex);
        SysUtil.dumbDeleteRecursive(dsoFileName); // Throws on error; not existing is okay
        dsoFile = new RandomAccessFile(dsoFileName, "rw");
      }

      int sizeHint = iDso.available();
      if (sizeHint > 1) {
        SysUtil.fallocateIfSupported(dsoFile.getFD(), sizeHint);
      }
      iDso.write(dsoFile, ioBuffer);
      dsoFile.setLength(dsoFile.getFilePointer()); // In case we shortened file
      if (!dsoFileName.setExecutable(true /* allow exec... */, false /* ...for everyone */)) {
        throw new IOException("cannot make file executable: " + dsoFileName);
      }
    } catch (IOException e) {
      SysUtil.dumbDeleteRecursive(dsoFileName);
      throw e;
    } finally {
      if (!dsoFileName.setWritable(false)) {
        Log.w(TAG, "error removing " + dsoFileName + " write permission");
      }
      if (dsoFile != null) {
        dsoFile.close();
      }
    }
  }