| /* |
| * Copyright (C) 2020 The Android Open Source Project |
| * |
| * 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. |
| */ |
| |
| #pragma once |
| |
| #include <string> |
| #include <vector> |
| |
| namespace android::mediametrics::stringutils { |
| |
| /** |
| * fieldPrint is a helper method that logs to a stringstream a sequence of |
| * field names (in a fixed size array) together with a variable number of arg parameters. |
| * |
| * stringstream << field[0] << ":" << arg0 << " "; |
| * stringstream << field[1] << ":" << arg1 << " "; |
| * ... |
| * stringstream << field[N-1] << ":" << arg{N-1} << " "; |
| * |
| * The number of fields must exactly match the (variable) arguments. |
| * |
| * Example: |
| * |
| * const char * const fields[] = { "integer" }; |
| * std::stringstream ss; |
| * fieldPrint(ss, fields, int(10)); |
| */ |
| template <size_t N, typename... Targs> |
| void fieldPrint(std::stringstream& ss, const char * const (& fields)[N], Targs... args) { |
| static_assert(N == sizeof...(args)); // guarantee #fields == #args |
| auto fptr = fields; // get a pointer to the base of fields array |
| ((ss << *fptr++ << ":" << args << " "), ...); // (fold expression), send to stringstream. |
| } |
| |
| /** |
| * Return string tokens from iterator, separated by spaces and reserved chars. |
| */ |
| std::string tokenizer(std::string::const_iterator& it, |
| const std::string::const_iterator& end, const char *reserved); |
| |
| /** |
| * Splits flags string based on delimeters (or, whitespace which is removed). |
| */ |
| std::vector<std::string> split(const std::string& flags, const char *delim); |
| |
| /** |
| * Parse the devices string and return a vector of device address pairs. |
| * |
| * A failure to parse returns early with the contents that were able to be parsed. |
| */ |
| std::vector<std::pair<std::string, std::string>> getDeviceAddressPairs(const std::string &devices); |
| |
| /** |
| * Replaces targetChars with replaceChar in string, returns number of chars replaced. |
| */ |
| size_t replace(std::string &str, const char *targetChars, const char replaceChar); |
| |
| } // namespace android::mediametrics::stringutils |