131 lines
4.4 KiB
C++
131 lines
4.4 KiB
C++
/*
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* Copyright (C) 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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//#define LOG_NDEBUG 0
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#define LOG_TAG "MediaMetricsService::stringutils"
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#include <utils/Log.h>
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#include "StringUtils.h"
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#include "AudioTypes.h"
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namespace android::mediametrics::stringutils {
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std::string tokenizer(std::string::const_iterator& it,
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const std::string::const_iterator& end, const char *reserved)
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{
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// consume leading white space
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for (; it != end && std::isspace(*it); ++it);
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if (it == end) return {};
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auto start = it;
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// parse until we hit a reserved keyword or space
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if (strchr(reserved, *it)) return {start, ++it};
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for (;;) {
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++it;
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if (it == end || std::isspace(*it) || strchr(reserved, *it)) return {start, it};
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}
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}
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std::vector<std::string> split(const std::string& flags, const char *delim)
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{
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std::vector<std::string> result;
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for (auto it = flags.begin(); ; ) {
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auto flag = tokenizer(it, flags.end(), delim);
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if (flag.empty() || !std::isalnum(flag[0])) return result;
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result.emplace_back(std::move(flag));
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// look for the delimeter and discard
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auto token = tokenizer(it, flags.end(), delim);
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if (token.size() != 1 || strchr(delim, token[0]) == nullptr) return result;
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}
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}
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std::vector<std::pair<std::string, std::string>> getDeviceAddressPairs(const std::string& devices)
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{
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std::vector<std::pair<std::string, std::string>> result;
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// Currently, the device format is EXACTLY
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// (device1, addr1)|(device2, addr2)|...
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static constexpr char delim[] = "()|,";
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for (auto it = devices.begin(); ; ) {
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auto token = tokenizer(it, devices.end(), delim);
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if (token != "(") return result;
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auto device = tokenizer(it, devices.end(), delim);
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if (device.empty() || !std::isalnum(device[0])) return result;
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token = tokenizer(it, devices.end(), delim);
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if (token != ",") return result;
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// special handling here for empty addresses
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auto address = tokenizer(it, devices.end(), delim);
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if (address.empty() || !std::isalnum(device[0])) return result;
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if (address == ")") { // no address, just the ")"
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address.clear();
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} else {
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token = tokenizer(it, devices.end(), delim);
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if (token != ")") return result;
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}
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result.emplace_back(std::move(device), std::move(address));
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token = tokenizer(it, devices.end(), delim);
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if (token != "|") return result; // this includes end of string detection
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}
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}
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size_t replace(std::string &str, const char *targetChars, const char replaceChar)
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{
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size_t replaced = 0;
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for (char &c : str) {
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if (strchr(targetChars, c) != nullptr) {
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c = replaceChar;
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++replaced;
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}
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}
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return replaced;
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}
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template <types::AudioEnumCategory CATEGORY>
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std::pair<std::string /* external statsd */, std::string /* internal */>
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parseDevicePairs(const std::string& devicePairs) {
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std::pair<std::string, std::string> result{};
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const auto devaddrvec = stringutils::getDeviceAddressPairs(devicePairs);
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for (const auto& [device, addr] : devaddrvec) { // addr ignored for now.
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if (!result.second.empty()) {
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result.second.append("|"); // delimit devices with '|'.
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result.first.append("|");
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}
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result.second.append(device);
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result.first.append(types::lookup<CATEGORY, std::string>(device));
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}
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return result;
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}
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std::pair<std::string /* external statsd */, std::string /* internal */>
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parseOutputDevicePairs(const std::string& devicePairs) {
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return parseDevicePairs<types::OUTPUT_DEVICE>(devicePairs);
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}
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std::pair<std::string /* external statsd */, std::string /* internal */>
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parseInputDevicePairs(const std::string& devicePairs) {
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return parseDevicePairs<types::INPUT_DEVICE>(devicePairs);
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}
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} // namespace android::mediametrics::stringutils
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