28     TEST_AND_RETURN_FALSE_SET_ERROR(index_ < puff_size_,  in GetNext()
30     if (puff_buf_in_[index_] & 0x80) {  // Reading length/distance.  in GetNext()
31       if ((puff_buf_in_[index_] & 0x7F) < 127) {  in GetNext()
32         length = puff_buf_in_[index_] & 0x7F;  in GetNext()
34         index_++;  in GetNext()
36         TEST_AND_RETURN_FALSE_SET_ERROR(index_ < puff_size_,  in GetNext()
38         length = puff_buf_in_[index_] + 127;  in GetNext()
43       index_++;  in GetNext()
55       TEST_AND_RETURN_FALSE_SET_ERROR(index_ + 1 < puff_size_,  in GetNext()
57       auto distance = ReadByteArrayToUint16(&puff_buf_in_[index_]);  in GetNext()
63       index_ += 2;  in GetNext()
72       TEST_AND_RETURN_FALSE_SET_ERROR(index_ < puff_size_,  in GetNext()
74       if ((puff_buf_in_[index_] & 0x7F) < 127) {  in GetNext()
75         length = puff_buf_in_[index_] & 0x7F;  in GetNext()
76         index_++;  in GetNext()
78         index_++;  in GetNext()
80         TEST_AND_RETURN_FALSE_SET_ERROR(index_ + 1 < puff_size_,  in GetNext()
82         length = ReadByteArrayToUint16(&puff_buf_in_[index_]) + 127;  in GetNext()
83         index_ += 2;  in GetNext()
88       TEST_AND_RETURN_FALSE_SET_ERROR(index_ + length <= puff_size_,  in GetNext()
94         memcpy(buffer, &puff_buf_in_[index_], count);  in GetNext()
95         index_ += count;  in GetNext()
104     TEST_AND_RETURN_FALSE_SET_ERROR(index_ + 2 < puff_size_,  in GetNext()
106     length = ReadByteArrayToUint16(&puff_buf_in_[index_]) + 1;  in GetNext()
107     index_ += 2;  in GetNext()
110     TEST_AND_RETURN_FALSE_SET_ERROR(index_ + length <= puff_size_,  in GetNext()
113     memcpy(pd.block_metadata, &puff_buf_in_[index_], length);  in GetNext()
114     index_ += length;  in GetNext()
122   return puff_size_ - index_;  in BytesLeft()