119 lines
4.3 KiB
C++
119 lines
4.3 KiB
C++
/*
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* Copyright (C) 2014 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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#ifndef LATINIME_DICT_TOOLKIT_ARGUMENTS_PARSER_H
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#define LATINIME_DICT_TOOLKIT_ARGUMENTS_PARSER_H
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#include <string>
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#include <unordered_map>
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#include <vector>
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#include "dict_toolkit_defines.h"
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#include "utils/arguments_and_options.h"
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namespace latinime {
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namespace dicttoolkit {
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class OptionSpec {
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public:
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// Default constructor and assignment operator is enabled to be used with std::unordered_map.
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OptionSpec() = default;
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OptionSpec &operator=(const OptionSpec &) = default;
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static OptionSpec keyValueOption(const std::string &valueName, const std::string &defaultValue,
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const std::string &description) {
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return OptionSpec(true /* takeValue */, valueName, defaultValue, description);
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}
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static OptionSpec switchOption(const std::string &description) {
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return OptionSpec(false /* takeValue */, "" /* valueName */, "" /* defaultValue */,
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description);
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}
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bool takeValue() const { return mTakeValue; }
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const std::string &getValueName() const { return mValueName; }
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const std::string &getDefaultValue() const { return mDefaultValue; }
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const std::string &getDescription() const { return mDescription; }
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private:
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OptionSpec(const bool takeValue, const std::string &valueName, const std::string &defaultValue,
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const std::string &description)
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: mTakeValue(takeValue), mValueName(valueName), mDefaultValue(defaultValue),
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mDescription(description) {}
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// Whether the option have to be used with a value or just a switch.
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// e.g. 'f' in "command -f /path/to/file" is mTakeValue == true.
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// 'f' in "command -f -t" is mTakeValue == false.
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bool mTakeValue;
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// Name of the value used to show usage.
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std::string mValueName;
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std::string mDefaultValue;
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std::string mDescription;
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};
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class ArgumentSpec {
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public:
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static const int UNLIMITED_COUNT;
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static ArgumentSpec singleArgument(const std::string &name, const std::string &description) {
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return ArgumentSpec(name, 1 /* minCount */, 1 /* maxCount */, description);
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}
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static ArgumentSpec variableLengthArguments(const std::string &name, const int minCount,
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const int maxCount, const std::string &description) {
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return ArgumentSpec(name, minCount, maxCount, description);
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}
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const std::string &getName() const { return mName; }
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int getMinCount() const { return mMinCount; }
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int getMaxCount() const { return mMaxCount; }
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const std::string &getDescription() const { return mDescription; }
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private:
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DISALLOW_DEFAULT_CONSTRUCTOR(ArgumentSpec);
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ArgumentSpec(const std::string &name, const int minCount, const int maxCount,
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const std::string &description)
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: mName(name), mMinCount(minCount), mMaxCount(maxCount), mDescription(description) {}
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const std::string mName;
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const int mMinCount;
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const int mMaxCount;
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const std::string mDescription;
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};
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class ArgumentsParser {
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public:
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ArgumentsParser(const std::unordered_map<std::string, OptionSpec> &&optionSpecs,
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const std::vector<ArgumentSpec> &&argumentSpecs)
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: mOptionSpecs(std::move(optionSpecs)), mArgumentSpecs(std::move(argumentSpecs)) {}
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const ArgumentsAndOptions parseArguments(const int argc, char **argv) const;
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bool validateSpecs() const;
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void printUsage(const std::string &commandName, const std::string &description) const;
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private:
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DISALLOW_DEFAULT_CONSTRUCTOR(ArgumentsParser);
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DISALLOW_ASSIGNMENT_OPERATOR(ArgumentsParser);
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const std::unordered_map<std::string, OptionSpec> mOptionSpecs;
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const std::vector<ArgumentSpec> mArgumentSpecs;
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};
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} // namespace dicttoolkit
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} // namespace latinime
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#endif // LATINIME_DICT_TOOLKIT_ARGUMENTS_PARSER_H
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