1 /* 2 * Copyright (C) 2016 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 #ifndef STRING_HELPER_H_ 18 19 #define STRING_HELPER_H_ 20 21 #include <string> 22 #include <vector> 23 24 namespace android { 25 26 struct StringHelper { 27 28 enum Case { 29 // return original string 30 kNoCase = 0, 31 // use camelCase 32 kCamelCase = 1, 33 // use PascalCase 34 kPascalCase = 2, 35 // use UP_SNAKE_CASE 36 kUpperSnakeCase = 3, 37 // use low_snake_case 38 kLowerSnakeCase = 4 39 }; 40 41 // methods for a single word, like device 42 // UPPERCASE 43 static std::string Uppercase(const std::string &in); 44 // lowercase 45 static std::string Lowercase(const std::string &in); 46 // Capitalize 47 static std::string Capitalize(const std::string &in); 48 49 // methods for a multi-word identifier, like framebuffer_device 50 static std::string ToCamelCase(const std::string &in); 51 static std::string ToPascalCase(const std::string &in); 52 static std::string ToUpperSnakeCase(const std::string &in); 53 static std::string ToLowerSnakeCase(const std::string &in); 54 static std::string ToCase(Case c, const std::string &in); 55 56 static bool EndsWith(const std::string &in, const std::string &suffix); 57 static bool StartsWith(const std::string &in, const std::string &prefix); 58 59 /* removes suffix once from in if in ends with suffix */ 60 static std::string RTrim(const std::string &in, const std::string &suffix); 61 62 /* removes prefix once from in if in starts with prefix */ 63 static std::string LTrim(const std::string &in, const std::string &prefix); 64 65 /* removes suffix repeatedly from in if in ends with suffix */ 66 static std::string RTrimAll(const std::string &in, const std::string &suffix); 67 68 /* removes prefix repeatedly from in if in starts with prefix */ 69 static std::string LTrimAll(const std::string &in, const std::string &prefix); 70 71 72 static void SplitString( 73 const std::string &s, 74 char c, 75 std::vector<std::string> *components); 76 77 static std::string JoinStrings( 78 const std::vector<std::string> &components, 79 const std::string &separator); 80 81 private: 82 StringHelper() = delete; 83 84 static void Tokenize(const std::string &in, 85 std::vector<std::string> *vec); 86 }; 87 88 } // namespace android 89 90 #endif // STRING_HELPER_H_ 91 92