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R9868/src/include/tclap/CmdLine.h
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CmdLine.h
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// -*- Mode: c++; c-basic-offset: 4; tab-width: 4; -*-
/******************************************************************************
*
* file: CmdLine.h
*
* Copyright (c) 2003, Michael E. Smoot .
* Copyright (c) 2004, Michael E. Smoot, Daniel Aarno.
* All rights reserved.
*
* See the file COPYING in the top directory of this distribution for
* more information.
*
* THE SOFTWARE IS PROVIDED _AS IS_, WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
*****************************************************************************/
#ifndef TCLAP_CMDLINE_H
#define TCLAP_CMDLINE_H
#include <tclap/SwitchArg.h>
#include <tclap/MultiSwitchArg.h>
#include <tclap/UnlabeledValueArg.h>
#include <tclap/UnlabeledMultiArg.h>
#include <tclap/XorHandler.h>
#include <tclap/HelpVisitor.h>
#include <tclap/VersionVisitor.h>
#include <tclap/IgnoreRestVisitor.h>
#include <tclap/CmdLineOutput.h>
#include <tclap/StdOutput.h>
#include <tclap/Constraint.h>
#include <tclap/ValuesConstraint.h>
#include <string>
#include <vector>
#include <list>
#include <iostream>
#include <iomanip>
#include <algorithm>
#include <stdlib.h> // Needed for exit(), which isn't defined in some envs.
namespace TCLAP {
template<typename T> void DelPtr(T ptr)
{
delete ptr;
}
template<typename C> void ClearContainer(C &c)
{
typedef typename C::value_type value_type;
std::for_each(c.begin(), c.end(), DelPtr<value_type>);
c.clear();
}
/**
* The base class that manages the command line definition and passes
* along the parsing to the appropriate Arg classes.
*/
class CmdLine : public CmdLineInterface
{
protected:
/**
* The list of arguments that will be tested against the
* command line.
*/
std::list<Arg*> _argList;
/**
* The name of the program. Set to argv[0].
*/
std::string _progName;
/**
* A message used to describe the program. Used in the usage output.
*/
std::string _message;
/**
* The version to be displayed with the --version switch.
*/
std::string _version;
/**
* The number of arguments that are required to be present on
* the command line. This is set dynamically, based on the
* Args added to the CmdLine object.
*/
int _numRequired;
/**
* The character that is used to separate the argument flag/name
* from the value. Defaults to ' ' (space).
*/
char _delimiter;
/**
* The handler that manages xoring lists of args.
*/
XorHandler _xorHandler;
/**
* A list of Args to be explicitly deleted when the destructor
* is called. At the moment, this only includes the three default
* Args.
*/
std::list<Arg*> _argDeleteOnExitList;
/**
* A list of Visitors to be explicitly deleted when the destructor
* is called. At the moment, these are the Visitors created for the
* default Args.
*/
std::list<Visitor*> _visitorDeleteOnExitList;
/**
* Object that handles all output for the CmdLine.
*/
CmdLineOutput* _output;
/**
* Should CmdLine handle parsing exceptions internally?
*/
bool _handleExceptions;
/**
* Throws an exception listing the missing args.
*/
void missingArgsException();
/**
* Checks whether a name/flag string matches entirely matches
* the Arg::blankChar. Used when multiple switches are combined
* into a single argument.
* \param s - The message to be used in the usage.
*/
bool _emptyCombined(const std::string& s);
/**
* Perform a delete ptr; operation on ptr when this object is deleted.
*/
void deleteOnExit(Arg* ptr);
/**
* Perform a delete ptr; operation on ptr when this object is deleted.
*/
void deleteOnExit(Visitor* ptr);
private:
/**
* Prevent accidental copying.
*/
CmdLine(const CmdLine& rhs);
CmdLine& operator=(const CmdLine& rhs);
/**
* Encapsulates the code common to the constructors
* (which is all of it).
*/
void _constructor();
/**
* Is set to true when a user sets the output object. We use this so
* that we don't delete objects that are created outside of this lib.
*/
bool _userSetOutput;
/**
* Whether or not to automatically create help and version switches.
*/
bool _helpAndVersion;
public:
/**
* Command line constructor. Defines how the arguments will be
* parsed.
* \param message - The message to be used in the usage
* output.
* \param delimiter - The character that is used to separate
* the argument flag/name from the value. Defaults to ' ' (space).
* \param version - The version number to be used in the
* --version switch.
* \param helpAndVersion - Whether or not to create the Help and
* Version switches. Defaults to true.
*/
CmdLine(const std::string& message,
const char delimiter = ' ',
const std::string& version = "none",
bool helpAndVersion = true);
/**
* Deletes any resources allocated by a CmdLine object.
*/
virtual ~CmdLine();
/**
* Adds an argument to the list of arguments to be parsed.
* \param a - Argument to be added.
*/
void add( Arg& a );
/**
* An alternative add. Functionally identical.
* \param a - Argument to be added.
*/
void add( Arg* a );
/**
* Add two Args that will be xor'd. If this method is used, add does
* not need to be called.
* \param a - Argument to be added and xor'd.
* \param b - Argument to be added and xor'd.
*/
void xorAdd( Arg& a, Arg& b );
/**
* Add a list of Args that will be xor'd. If this method is used,
* add does not need to be called.
* \param xors - List of Args to be added and xor'd.
*/
void xorAdd( std::vector<Arg*>& xors );
/**
* Parses the command line.
* \param argc - Number of arguments.
* \param argv - Array of arguments.
*/
void parse(int argc, const char * const * argv);
/**
* Parses the command line.
* \param args - A vector of strings representing the args.
* args[0] is still the program name.
*/
void parse(std::vector<std::string>& args);
/**
*
*/
CmdLineOutput* getOutput();
/**
*
*/
void setOutput(CmdLineOutput* co);
/**
*
*/
std::string& getVersion();
/**
*
*/
std::string& getProgramName();
/**
*
*/
std::list<Arg*>& getArgList();
/**
*
*/
XorHandler& getXorHandler();
/**
*
*/
char getDelimiter();
/**
*
*/
std::string& getMessage();
/**
*
*/
bool hasHelpAndVersion();
/**
* Disables or enables CmdLine's internal parsing exception handling.
*
* @param state Should CmdLine handle parsing exceptions internally?
*/
void setExceptionHandling(const bool state);
/**
* Returns the current state of the internal exception handling.
*
* @retval true Parsing exceptions are handled internally.
* @retval false Parsing exceptions are propagated to the caller.
*/
bool getExceptionHandling() const;
/**
* Allows the CmdLine object to be reused.
*/
void reset();
};
///////////////////////////////////////////////////////////////////////////////
//Begin CmdLine.cpp
///////////////////////////////////////////////////////////////////////////////
inline CmdLine::CmdLine(const std::string& m,
char delim,
const std::string& v,
bool help )
:
_argList(std::list<Arg*>()),
_progName("not_set_yet"),
_message(m),
_version(v),
_numRequired(0),
_delimiter(delim),
_xorHandler(XorHandler()),
_argDeleteOnExitList(std::list<Arg*>()),
_visitorDeleteOnExitList(std::list<Visitor*>()),
_output(0),
_handleExceptions(true),
_userSetOutput(false),
_helpAndVersion(help)
{
_constructor();
}
inline CmdLine::~CmdLine()
{
ClearContainer(_argDeleteOnExitList);
ClearContainer(_visitorDeleteOnExitList);
if ( !_userSetOutput ) {
delete _output;
_output = 0;
}
}
inline void CmdLine::_constructor()
{
_output = new StdOutput;
Arg::setDelimiter( _delimiter );
Visitor* v;
if ( _helpAndVersion )
{
v = new HelpVisitor( this, &_output );
SwitchArg* help = new SwitchArg("h","help",
"Displays usage information and exits.",
false, v);
add( help );
deleteOnExit(help);
deleteOnExit(v);
v = new VersionVisitor( this, &_output );
SwitchArg* vers = new SwitchArg("","version",
"Displays version information and exits.",
false, v);
add( vers );
deleteOnExit(vers);
deleteOnExit(v);
}
v = new IgnoreRestVisitor();
SwitchArg* ignore = new SwitchArg(Arg::flagStartString(),
Arg::ignoreNameString(),
"Ignores the rest of the labeled arguments following this flag.",
false, v);
add( ignore );
deleteOnExit(ignore);
deleteOnExit(v);
}
inline void CmdLine::xorAdd( std::vector<Arg*>& ors )
{
_xorHandler.add( ors );
for (ArgVectorIterator it = ors.begin(); it != ors.end(); it++)
{
(*it)->forceRequired();
(*it)->setRequireLabel( "OR required" );
add( *it );
}
}
inline void CmdLine::xorAdd( Arg& a, Arg& b )
{
std::vector<Arg*> ors;
ors.push_back( &a );
ors.push_back( &b );
xorAdd( ors );
}
inline void CmdLine::add( Arg& a )
{
add( &a );
}
inline void CmdLine::add( Arg* a )
{
for( ArgListIterator it = _argList.begin(); it != _argList.end(); it++ )
if ( *a == *(*it) )
throw( SpecificationException(
"Argument with same flag/name already exists!",
a->longID() ) );
a->addToList( _argList );
if ( a->isRequired() )
_numRequired++;
}
inline void CmdLine::parse(int argc, const char * const * argv)
{
// this step is necessary so that we have easy access to
// mutable strings.
std::vector<std::string> args;
for (int i = 0; i < argc; i++)
args.push_back(argv[i]);
parse(args);
}
inline void CmdLine::parse(std::vector<std::string>& args)
{
bool shouldExit = false;
int estat = 0;
try {
_progName = args.front();
args.erase(args.begin());
int requiredCount = 0;
for (int i = 0; static_cast<unsigned int>(i) < args.size(); i++)
{
bool matched = false;
for (ArgListIterator it = _argList.begin();
it != _argList.end(); it++) {
if ( (*it)->processArg( &i, args ) )
{
requiredCount += _xorHandler.check( *it );
matched = true;
break;
}
}
// checks to see if the argument is an empty combined
// switch and if so, then we've actually matched it
if ( !matched && _emptyCombined( args[i] ) )
matched = true;
if ( !matched && !Arg::ignoreRest() )
throw(CmdLineParseException("Couldn't find match "
"for argument",
args[i]));
}
if ( requiredCount < _numRequired )
missingArgsException();
if ( requiredCount > _numRequired )
throw(CmdLineParseException("Too many arguments!"));
} catch ( ArgException& e ) {
// If we're not handling the exceptions, rethrow.
if ( !_handleExceptions) {
throw;
}
try {
_output->failure(*this,e);
} catch ( ExitException &ee ) {
estat = ee.getExitStatus();
shouldExit = true;
}
} catch (ExitException &ee) {
// If we're not handling the exceptions, rethrow.
if ( !_handleExceptions) {
throw;
}
estat = ee.getExitStatus();
shouldExit = true;
}
if (shouldExit)
exit(estat);
}
inline bool CmdLine::_emptyCombined(const std::string& s)
{
if ( s.length() > 0 && s[0] != Arg::flagStartChar() )
return false;
for ( int i = 1; static_cast<unsigned int>(i) < s.length(); i++ )
if ( s[i] != Arg::blankChar() )
return false;
return true;
}
inline void CmdLine::missingArgsException()
{
int count = 0;
std::string missingArgList;
for (ArgListIterator it = _argList.begin(); it != _argList.end(); it++)
{
if ( (*it)->isRequired() && !(*it)->isSet() )
{
missingArgList += (*it)->getName();
missingArgList += ", ";
count++;
}
}
missingArgList = missingArgList.substr(0,missingArgList.length()-2);
std::string msg;
if ( count > 1 )
msg = "Required arguments missing: ";
else
msg = "Required argument missing: ";
msg += missingArgList;
throw(CmdLineParseException(msg));
}
inline void CmdLine::deleteOnExit(Arg* ptr)
{
_argDeleteOnExitList.push_back(ptr);
}
inline void CmdLine::deleteOnExit(Visitor* ptr)
{
_visitorDeleteOnExitList.push_back(ptr);
}
inline CmdLineOutput* CmdLine::getOutput()
{
return _output;
}
inline void CmdLine::setOutput(CmdLineOutput* co)
{
if ( !_userSetOutput )
delete _output;
_userSetOutput = true;
_output = co;
}
inline std::string& CmdLine::getVersion()
{
return _version;
}
inline std::string& CmdLine::getProgramName()
{
return _progName;
}
inline std::list<Arg*>& CmdLine::getArgList()
{
return _argList;
}
inline XorHandler& CmdLine::getXorHandler()
{
return _xorHandler;
}
inline char CmdLine::getDelimiter()
{
return _delimiter;
}
inline std::string& CmdLine::getMessage()
{
return _message;
}
inline bool CmdLine::hasHelpAndVersion()
{
return _helpAndVersion;
}
inline void CmdLine::setExceptionHandling(const bool state)
{
_handleExceptions = state;
}
inline bool CmdLine::getExceptionHandling() const
{
return _handleExceptions;
}
inline void CmdLine::reset()
{
for( ArgListIterator it = _argList.begin(); it != _argList.end(); it++ )
(*it)->reset();
_progName.clear();
}
///////////////////////////////////////////////////////////////////////////////
//End CmdLine.cpp
///////////////////////////////////////////////////////////////////////////////
} //namespace TCLAP
#endif
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