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#ifndef QPID_COMMONOPTIONS_H
#define QPID_COMMONOPTIONS_H
/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*
*/
#include "qpid/Exception.h"
// Disable warnings triggered by boost.
#ifdef _MSC_VER
# pragma warning(push)
# pragma warning(disable : 4251 4275)
#endif
#include <boost/lexical_cast.hpp>
#include <boost/shared_ptr.hpp>
#ifdef _MSC_VER
# pragma warning(pop)
#endif
#include <sstream>
#include <iterator>
#include <algorithm>
#include <string>
#include <vector>
#include <iosfwd>
#include "qpid/CommonImportExport.h"
namespace boost {
namespace program_options {
class value_semantic;
class option_description;
class options_description;
}}
namespace qpid {
namespace po=boost::program_options;
///@internal
QPID_COMMON_EXTERN std::string prettyArg(const std::string&, const std::string&);
///@internal
template <class T>
po::value_semantic* create_value(T& val, const std::string& arg);
/** Create an option value.
* name, value appear after the option name in help like this:
* <name> (=<value>)
* T must support operator <<.
*@see Options for example of use.
*/
template<class T>
po::value_semantic* optValue(T& value, const char* name) {
std::string valstr(boost::lexical_cast<std::string>(value));
return create_value(value, prettyArg(name, valstr));
}
/** Create a vector value. Multiple occurences of the option are
* accumulated into the vector
*/
template <class T>
po::value_semantic* optValue(std::vector<T>& value, const char* name) {
std::ostringstream os;
std::copy(value.begin(), value.end(), std::ostream_iterator<T>(os, " "));
std::string val=os.str();
if (!val.empty())
val.erase(val.end()-1); // Remove trailing " "
return create_value(value, prettyArg(name, val));
}
/** Create a boolean switch value. Presence of the option sets the value. */
QPID_COMMON_EXTERN po::value_semantic* optValue(bool& value);
QPID_COMMON_EXTERN po::value_semantic* pure_switch(bool& value);
/**
* Base class for options.
* Example of use:
@code
struct MySubOptions : public Options {
int x;
string y;
MySubOptions() : Options("Sub options") {
addOptions()
("x", optValue(x,"XUNIT"), "Option X")
("y", optValue(y, "YUNIT"), "Option Y");
}
};
struct MyOptions : public Options {
bool z;
vector<string> foo;
MySubOptions subOptions;
MyOptions() : Options("My Options") {
addOptions()
("z", boolSwitch(z), "Option Z")
("foo", optValue(foo), "Multiple option foo");
add(subOptions);
}
main(int argc, char** argv) {
Options opts;
opts.parse(argc, char** argv);
// Use values
dosomething(opts.subOptions.x);
if (error)
cout << opts << end; // Help message.
}
@endcode
*/
class options_description_easy_init {
public:
QPID_COMMON_EXTERN options_description_easy_init(po::options_description* o);
QPID_COMMON_EXTERN options_description_easy_init&
operator()(const char* name,
const po::value_semantic* s,
const char* description);
private:
po::options_description* owner;
};
struct Options {
friend QPID_COMMON_EXTERN std::ostream& operator<<(std::ostream& os, const Options&);
struct Exception : public qpid::Exception {
Exception(const std::string& msg) : qpid::Exception(msg) {}
};
QPID_COMMON_EXTERN explicit Options(const std::string& name=std::string());
/**
* Parses options from argc/argv, environment variables and config file.
* Note the filename argument can reference an options variable that
* is updated by argc/argv or environment variable parsing.
*/
QPID_COMMON_EXTERN void parse(int argc, char const* const* argv,
const std::string& configfile=std::string(),
bool allowUnknown = false);
/**
* Tests for presence of argc/argv switch
*/
QPID_COMMON_EXTERN bool findArg(int argc, char const* const* argv,
const std::string& theArg);
QPID_COMMON_EXTERN options_description_easy_init addOptions();
QPID_COMMON_EXTERN void add(Options&);
QPID_COMMON_EXTERN const std::vector< boost::shared_ptr<po::option_description> >& options() const;
QPID_COMMON_EXTERN bool find_nothrow(const std::string&, bool);
QPID_COMMON_EXTERN void print(std::ostream& os);
private:
boost::shared_ptr<po::options_description> poOptions;
};
QPID_COMMON_EXTERN std::ostream& operator<<(std::ostream& os, const Options&);
/**
* Standard options for configuration
*/
struct CommonOptions : public Options {
QPID_COMMON_EXTERN CommonOptions(const std::string& name=std::string(),
const std::string& configfile=std::string(),
const std::string& clientConfigFile=std::string());
bool help;
bool version;
std::string config;
std::string clientConfig;
};
} // namespace qpid
#endif /*!QPID_COMMONOPTIONS_H*/
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