1 /* 2 * Copyright 2017, The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "word_stream_impl.h" 18 19 namespace android { 20 namespace spirit { 21 22 WordStreamImpl::WordStreamImpl() {} 23 24 WordStreamImpl::WordStreamImpl(const std::vector<uint32_t> &words) 25 : mWords(words), mIter(mWords.begin()) {} 26 27 WordStreamImpl::WordStreamImpl(std::vector<uint32_t> &&words) 28 : mWords(words), mIter(mWords.begin()) {} 29 30 WordStreamImpl &WordStreamImpl::operator<<(const std::string &str) { 31 const size_t len = str.length(); 32 const uint32_t *begin = (uint32_t *)str.c_str(); 33 const uint32_t *end = begin + (len / 4); 34 mWords.insert(mWords.end(), begin, end); 35 36 uint32_t lastWord = *end; 37 uint32_t mask = 0xFF; 38 bool clear = false; 39 for (int i = 0; i < 4; i++, mask <<= 8) { 40 if (clear) { 41 lastWord &= ~mask; 42 } else { 43 clear = ((lastWord & mask) == 0); 44 } 45 } 46 mWords.push_back(lastWord); 47 return *this; 48 } 49 50 WordStreamImpl &WordStreamImpl::operator>>(std::string *str) { 51 const char *s = (const char *)&*mIter; 52 str->assign(s); 53 while (*mIter++ & 0xFF000000) { 54 } 55 return *this; 56 } 57 58 } // namespace spirit 59 } // namespace android 60
