| // Copyright 2022 Google LLC |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include "./escaping.h" |
| |
| namespace codelab { |
| |
| std::string Escape(std::string_view str) { |
| std::string result; |
| for (size_t i = 0; i < str.size(); ++i) { |
| switch (str[i]) { |
| case '\n': |
| result.push_back('\\'); |
| result.push_back('n'); |
| break; |
| case '\r': |
| result.push_back('\\'); |
| result.push_back('r'); |
| break; |
| case '\t': |
| result.push_back('\\'); |
| result.push_back('t'); |
| break; |
| case '\\': |
| result.push_back('\\'); |
| result.push_back('\\'); |
| break; |
| default: |
| result.push_back(str[i]); |
| break; |
| } |
| } |
| return result; |
| } |
| |
| std::string Unescape(std::string_view str) { |
| std::string result; |
| for (size_t i = 0; i < str.size(); ++i) { |
| if (str[i] == '\\') { |
| ++i; |
| switch (str[i]) { |
| case 'n': |
| result.push_back('\n'); |
| break; |
| case 't': |
| result.push_back('\t'); |
| break; |
| case '\\': |
| result.push_back('\\'); |
| break; |
| default: |
| break; |
| } |
| } else { |
| result.push_back(str[i]); |
| } |
| } |
| return result; |
| } |
| |
| } // namespace codelab |