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 "android-base/strings.h" 18 19 #include <stdlib.h> 20 #include <string.h> 21 22 #include <string> 23 #include <vector> 24 25 namespace android { 26 namespace base { 27 28 #define CHECK_NE(a, b) \ 29 if ((a) == (b)) abort(); 30 31 std::vector<std::string> Split(const std::string& s, 32 const std::string& delimiters) { 33 CHECK_NE(delimiters.size(), 0U); 34 35 std::vector<std::string> result; 36 37 size_t base = 0; 38 size_t found; 39 do { 40 found = s.find_first_of(delimiters, base); 41 result.push_back(s.substr(base, found - base)); 42 base = found + 1; 43 } while (found != s.npos); 44 45 return result; 46 } 47 48 std::string Trim(const std::string& s) { 49 std::string result; 50 51 if (s.size() == 0) { 52 return result; 53 } 54 55 size_t start_index = 0; 56 size_t end_index = s.size() - 1; 57 58 // Skip initial whitespace. 59 while (start_index < s.size()) { 60 if (!isspace(s[start_index])) { 61 break; 62 } 63 start_index++; 64 } 65 66 // Skip terminating whitespace. 67 while (end_index >= start_index) { 68 if (!isspace(s[end_index])) { 69 break; 70 } 71 end_index--; 72 } 73 74 // All spaces, no beef. 75 if (end_index < start_index) { 76 return ""; 77 } 78 // Start_index is the first non-space, end_index is the last one. 79 return s.substr(start_index, end_index - start_index + 1); 80 } 81 82 // These cases are probably the norm, so we mark them extern in the header to 83 // aid compile time and binary size. 84 template std::string Join(const std::vector<std::string>&, char); 85 template std::string Join(const std::vector<const char*>&, char); 86 template std::string Join(const std::vector<std::string>&, const std::string&); 87 template std::string Join(const std::vector<const char*>&, const std::string&); 88 89 bool StartsWith(const std::string& s, const char* prefix) { 90 return s.compare(0, strlen(prefix), prefix) == 0; 91 } 92 93 bool EndsWith(const std::string& s, const char* suffix) { 94 size_t suffix_length = strlen(suffix); 95 size_t string_length = s.size(); 96 if (suffix_length > string_length) { 97 return false; 98 } 99 size_t offset = string_length - suffix_length; 100 return s.compare(offset, suffix_length, suffix) == 0; 101 } 102 103 } // namespace base 104 } // namespace android 105
