99 lines
2.6 KiB
C++
99 lines
2.6 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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#include <android-base/strings.h>
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#include <algorithm>
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#include <string>
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namespace cuttlefish {
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class CommandParser {
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public:
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explicit CommandParser(const std::string& command) : copy_command_(command) {
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command_ = copy_command_;
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};
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~CommandParser() = default;
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CommandParser(CommandParser&&) = default;
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CommandParser& operator=(CommandParser&&) = default;
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inline void SkipPrefix();
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inline void SkipPrefixAT();
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inline void SkipComma();
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inline void SkipWhiteSpace();
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std::string_view GetNextStr();
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std::string_view GetNextStr(char flag);
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std::string GetNextStrDeciToHex(); /* for AT+CRSM */
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int GetNextInt();
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int GetNextHexInt();
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const std::string_view* operator->() const { return &command_; }
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const std::string_view& operator*() const { return command_; }
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bool operator==(const std::string &rhs) const { return command_ == rhs; }
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std::string_view::const_reference& operator[](int index) const { return command_[index]; }
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private:
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std::string copy_command_;
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std::string_view command_;
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};
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/**
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* Skip the substring before the first '=', including '='
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* updates command_
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* If '=' not exists, command_ remains unchanged
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*/
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inline void CommandParser::SkipPrefix() {
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auto pos = command_.find('=');
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if (pos != std::string_view::npos) {
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command_.remove_prefix(std::min(pos + 1, command_.size()));
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}
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}
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/**
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* Skip the next "AT" substring
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* updates command_
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*/
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inline void CommandParser::SkipPrefixAT() {
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android::base::ConsumePrefix(&command_, std::string_view("AT"));
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}
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/**
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* Skip the next comma
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* updates command_
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*/
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inline void CommandParser::SkipComma() {
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auto pos = command_.find(',');
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if (pos != std::string_view::npos) {
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command_.remove_prefix(std::min(pos + 1, command_.size()));
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}
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}
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/**
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* Skip the next whitespace
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* updates command_
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*/
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inline void CommandParser::SkipWhiteSpace() {
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auto pos = command_.find(' ');
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if (pos != std::string_view::npos) {
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command_.remove_prefix(std::min(pos + 1, command_.size()));
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}
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}
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} // namespace cuttlefish
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