Dan Albert | 0f1e544 | 2015-03-13 22:57:40 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2015 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 "base/strings.h" |
| 18 | |
| 19 | #include <string> |
| 20 | #include <vector> |
| 21 | |
| 22 | namespace android { |
| 23 | namespace base { |
| 24 | |
| 25 | void Split(const std::string& s, char separator, |
| 26 | std::vector<std::string>* result) { |
| 27 | const char* p = s.data(); |
| 28 | const char* end = p + s.size(); |
| 29 | while (p != end) { |
| 30 | if (*p == separator) { |
| 31 | ++p; |
| 32 | } else { |
| 33 | const char* start = p; |
| 34 | while (++p != end && *p != separator) { |
| 35 | // Skip to the next occurrence of the separator. |
| 36 | } |
| 37 | result->push_back(std::string(start, p - start)); |
| 38 | } |
| 39 | } |
| 40 | } |
| 41 | |
| 42 | std::string Trim(const std::string& s) { |
| 43 | std::string result; |
| 44 | |
| 45 | if (s.size() == 0) { |
| 46 | return result; |
| 47 | } |
| 48 | |
| 49 | size_t start_index = 0; |
| 50 | size_t end_index = s.size() - 1; |
| 51 | |
| 52 | // Skip initial whitespace. |
| 53 | while (start_index < s.size()) { |
| 54 | if (!isspace(s[start_index])) { |
| 55 | break; |
| 56 | } |
| 57 | start_index++; |
| 58 | } |
| 59 | |
| 60 | // Skip terminating whitespace. |
| 61 | while (end_index >= start_index) { |
| 62 | if (!isspace(s[end_index])) { |
| 63 | break; |
| 64 | } |
| 65 | end_index--; |
| 66 | } |
| 67 | |
| 68 | // All spaces, no beef. |
| 69 | if (end_index < start_index) { |
| 70 | return ""; |
| 71 | } |
| 72 | // Start_index is the first non-space, end_index is the last one. |
| 73 | return s.substr(start_index, end_index - start_index + 1); |
| 74 | } |
| 75 | |
| 76 | template <typename StringT> |
| 77 | std::string Join(const std::vector<StringT>& strings, char separator) { |
| 78 | if (strings.empty()) { |
| 79 | return ""; |
| 80 | } |
| 81 | |
| 82 | std::string result(strings[0]); |
| 83 | for (size_t i = 1; i < strings.size(); ++i) { |
| 84 | result += separator; |
| 85 | result += strings[i]; |
| 86 | } |
| 87 | return result; |
| 88 | } |
| 89 | |
| 90 | // Explicit instantiations. |
| 91 | template std::string Join<std::string>(const std::vector<std::string>& strings, |
| 92 | char separator); |
| 93 | template std::string Join<const char*>(const std::vector<const char*>& strings, |
| 94 | char separator); |
| 95 | |
| 96 | bool StartsWith(const std::string& s, const char* prefix) { |
| 97 | return s.compare(0, strlen(prefix), prefix) == 0; |
| 98 | } |
| 99 | |
| 100 | bool EndsWith(const std::string& s, const char* suffix) { |
| 101 | size_t suffix_length = strlen(suffix); |
| 102 | size_t string_length = s.size(); |
| 103 | if (suffix_length > string_length) { |
| 104 | return false; |
| 105 | } |
| 106 | size_t offset = string_length - suffix_length; |
| 107 | return s.compare(offset, suffix_length, suffix) == 0; |
| 108 | } |
| 109 | |
| 110 | } // namespace base |
| 111 | } // namespace android |