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/*
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef WEBRTC_TOOLS_SIMPLE_COMMAND_LINE_PARSER_H_
#define WEBRTC_TOOLS_SIMPLE_COMMAND_LINE_PARSER_H_
#include <map>
#include <string>
#include <vector>
#include "webrtc/base/constructormagic.h"
#include "webrtc/test/testsupport/gtest_prod_util.h"
// This is a very basic command line parsing class. We pass the command line
// arguments and their number and the class forms a vector out of these. Than we
// should set up the flags - we provide a name and a string value and map these.
//
// Example use of this class:
// 1. Create a CommandLineParser object.
// 2. Configure the flags you want to support with SetFlag calls.
// 3. Call Init with your program's argc+argv parameters.
// 4. Parse the flags by calling ProcessFlags.
// 5. Get the values of the flags using GetFlag.
namespace webrtc {
namespace test {
class CommandLineParser {
public:
CommandLineParser();
~CommandLineParser();
void Init(int argc, char** argv);
// Prints the entered flags and their values (without --help).
void PrintEnteredFlags();
// Processes the vector of command line arguments and puts the value of each
// flag in the corresponding map entry for this flag's name. We don't process
// flags which haven't been defined in the map.
void ProcessFlags();
// Sets the usage message to be shown if we pass --help.
void SetUsageMessage(std::string usage_message);
// prints the usage message.
void PrintUsageMessage();
// Set a flag into the map of flag names/values.
// To set a boolean flag, use "false" as the default flag value.
// The flag_name should not include the -- prefix.
void SetFlag(std::string flag_name, std::string default_flag_value);
// Gets a flag when provided a flag name (name is without the -- prefix).
// Returns "" if the flag is unknown and "true"/"false" if the flag is a
// boolean flag.
std::string GetFlag(std::string flag_name);
private:
// The vector of passed command line arguments.
std::vector<std::string> args_;
// The map of the flag names/values.
std::map<std::string, std::string> flags_;
// The usage message.
std::string usage_message_;
// Returns whether the passed flag is standalone or not. By standalone we
// understand e.g. --standalone (in contrast to --non_standalone=1).
bool IsStandaloneFlag(std::string flag);
// Checks whether the flag is in the format --flag_name=flag_value.
// or just --flag_name.
bool IsFlagWellFormed(std::string flag);
// Extracts the flag name from the flag, i.e. return foo for --foo=bar.
std::string GetCommandLineFlagName(std::string flag);
// Extracts the flag value from the flag, i.e. return bar for --foo=bar.
// If the flag has no value (i.e. no equals sign) an empty string is returned.
std::string GetCommandLineFlagValue(std::string flag);
FRIEND_TEST_ALL_PREFIXES(CommandLineParserTest, IsStandaloneFlag);
FRIEND_TEST_ALL_PREFIXES(CommandLineParserTest, IsFlagWellFormed);
FRIEND_TEST_ALL_PREFIXES(CommandLineParserTest, GetCommandLineFlagName);
FRIEND_TEST_ALL_PREFIXES(CommandLineParserTest, GetCommandLineFlagValue);
DISALLOW_COPY_AND_ASSIGN(CommandLineParser);
};
} // namespace test
} // namespace webrtc
#endif // WEBRTC_TOOLS_SIMPLE_COMMAND_LINE_PARSER_H_
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