Primiano Tucci | 825e6de | 2018-03-13 05:43:15 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2018 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 | |
Primiano Tucci | 2c5488f | 2019-06-01 03:27:28 +0100 | [diff] [blame] | 17 | #include "perfetto/ext/base/string_splitter.h" |
Primiano Tucci | 825e6de | 2018-03-13 05:43:15 +0000 | [diff] [blame] | 18 | |
| 19 | #include <utility> |
| 20 | |
| 21 | #include "perfetto/base/logging.h" |
| 22 | |
| 23 | namespace perfetto { |
| 24 | namespace base { |
| 25 | |
| 26 | StringSplitter::StringSplitter(std::string str, char delimiter) |
| 27 | : str_(std::move(str)), delimiter_(delimiter) { |
| 28 | // It's legal to access str[str.size()] in C++11 (it always returns \0), |
| 29 | // hence the +1 (which becomes just size() after the -1 in Initialize()). |
| 30 | Initialize(&str_[0], str_.size() + 1); |
| 31 | } |
| 32 | |
| 33 | StringSplitter::StringSplitter(char* str, size_t size, char delimiter) |
| 34 | : delimiter_(delimiter) { |
| 35 | Initialize(str, size); |
| 36 | } |
| 37 | |
| 38 | StringSplitter::StringSplitter(StringSplitter* outer, char delimiter) |
| 39 | : delimiter_(delimiter) { |
| 40 | Initialize(outer->cur_token(), outer->cur_token_size() + 1); |
| 41 | } |
| 42 | |
| 43 | void StringSplitter::Initialize(char* str, size_t size) { |
| 44 | PERFETTO_DCHECK(!size || str); |
| 45 | next_ = str; |
| 46 | end_ = str + size; |
| 47 | cur_ = nullptr; |
| 48 | cur_size_ = 0; |
| 49 | if (size) |
| 50 | next_[size - 1] = '\0'; |
| 51 | } |
| 52 | |
| 53 | bool StringSplitter::Next() { |
| 54 | for (; next_ < end_; next_++) { |
| 55 | if (*next_ == delimiter_) |
| 56 | continue; |
| 57 | cur_ = next_; |
| 58 | for (;; next_++) { |
| 59 | if (*next_ == delimiter_) { |
| 60 | cur_size_ = static_cast<size_t>(next_ - cur_); |
| 61 | *(next_++) = '\0'; |
| 62 | break; |
| 63 | } |
| 64 | if (*next_ == '\0') { |
| 65 | cur_size_ = static_cast<size_t>(next_ - cur_); |
| 66 | next_ = end_; |
| 67 | break; |
| 68 | } |
| 69 | } |
| 70 | if (*cur_) |
| 71 | return true; |
| 72 | break; |
| 73 | } |
| 74 | cur_ = nullptr; |
| 75 | cur_size_ = 0; |
| 76 | return false; |
| 77 | } |
| 78 | |
| 79 | } // namespace base |
| 80 | } // namespace perfetto |