1 | /* Copyright 2016 The TensorFlow Authors. All Rights Reserved. |
---|---|
2 | |
3 | Licensed under the Apache License, Version 2.0 (the "License"); |
4 | you may not use this file except in compliance with the License. |
5 | You may obtain a copy of the License at |
6 | |
7 | http://www.apache.org/licenses/LICENSE-2.0 |
8 | |
9 | Unless required by applicable law or agreed to in writing, software |
10 | distributed under the License is distributed on an "AS IS" BASIS, |
11 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
12 | See the License for the specific language governing permissions and |
13 | limitations under the License. |
14 | ==============================================================================*/ |
15 | |
16 | #include "tensorflow/tsl/platform/scanner.h" |
17 | |
18 | namespace tsl { |
19 | namespace strings { |
20 | |
21 | void Scanner::ScanUntilImpl(char end_ch, bool escaped) { |
22 | for (;;) { |
23 | if (cur_.empty()) { |
24 | Error(); |
25 | return; |
26 | } |
27 | const char ch = cur_[0]; |
28 | if (ch == end_ch) { |
29 | return; |
30 | } |
31 | |
32 | cur_.remove_prefix(1); |
33 | if (escaped && ch == '\\') { |
34 | // Escape character, skip next character. |
35 | if (cur_.empty()) { |
36 | Error(); |
37 | return; |
38 | } |
39 | cur_.remove_prefix(1); |
40 | } |
41 | } |
42 | } |
43 | |
44 | bool Scanner::GetResult(StringPiece* remaining, StringPiece* capture) { |
45 | if (error_) { |
46 | return false; |
47 | } |
48 | if (remaining != nullptr) { |
49 | *remaining = cur_; |
50 | } |
51 | if (capture != nullptr) { |
52 | const char* end = capture_end_ == nullptr ? cur_.data() : capture_end_; |
53 | *capture = StringPiece(capture_start_, end - capture_start_); |
54 | } |
55 | return true; |
56 | } |
57 | |
58 | } // namespace strings |
59 | } // namespace tsl |
60 |