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
WordStreamImpl()22 WordStreamImpl::WordStreamImpl() {}
23
WordStreamImpl(const std::vector<uint32_t> & words)24 WordStreamImpl::WordStreamImpl(const std::vector<uint32_t> &words)
25 : mWords(words), mIter(mWords.begin()) {}
26
WordStreamImpl(std::vector<uint32_t> && words)27 WordStreamImpl::WordStreamImpl(std::vector<uint32_t> &&words)
28 : mWords(words), mIter(mWords.begin()) {}
29
operator <<(const std::string & str)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
operator >>(std::string * str)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