Arg.h

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// -*- Mode: c++; c-basic-offset: 4; tab-width: 4; -*-

/******************************************************************************
 *
 *  file:  Arg.h
 *
 *  Copyright (c) 2003, Michael E. Smoot .
 *  Copyright (c) 2004, Michael E. Smoot, Daniel Aarno .
 *  Copyright (c) 2017 Google Inc.
 *  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_ARGUMENT_H
#define TCLAP_ARGUMENT_H

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <string>
#include <vector>
#include <list>
#include <iostream>
#include <iomanip>
#include <cstdio>

#include <tclap/sstream.h>

#include <tclap/ArgException.h>
#include <tclap/Visitor.h>
#include <tclap/CmdLineInterface.h>
#include <tclap/ArgTraits.h>
#include <tclap/StandardTraits.h>

namespace TCLAP {

class Arg
{
    private:
        Arg(const Arg& rhs);

        Arg& operator=(const Arg& rhs);

        static bool& ignoreRestRef() { static bool ign = false; return ign; }

        static char& delimiterRef() { static char delim = ' '; return delim; }

    protected:

        std::string _flag;

        std::string _name;

        std::string _description;

        bool _required;

        std::string _requireLabel;

        bool _valueRequired;

        bool _alreadySet;

        Visitor* _visitor;

        bool _ignoreable;

        bool _xorSet;

        bool _acceptsMultipleValues;

        void _checkWithVisitor() const;

        Arg( const std::string& flag,
             const std::string& name,
             const std::string& desc,
             bool req,
             bool valreq,
             Visitor* v = NULL );

    public:
        virtual ~Arg();

        virtual void addToList( std::list<Arg*>& argList ) const;

        static void beginIgnoring() { ignoreRestRef() = true; }

        static bool ignoreRest() { return ignoreRestRef(); }

        static char delimiter() { return delimiterRef(); }

        static char blankChar() { return (char)7; }

#ifndef TCLAP_FLAGSTARTCHAR
#define TCLAP_FLAGSTARTCHAR '-'
#endif
        static char flagStartChar() { return TCLAP_FLAGSTARTCHAR; }

#ifndef TCLAP_FLAGSTARTSTRING
#define TCLAP_FLAGSTARTSTRING "-"
#endif
        static const std::string flagStartString() { return TCLAP_FLAGSTARTSTRING; }

#ifndef TCLAP_NAMESTARTSTRING
#define TCLAP_NAMESTARTSTRING "--"
#endif
        static const std::string nameStartString() { return TCLAP_NAMESTARTSTRING; }

        static const std::string ignoreNameString() { return "ignore_rest"; }

        static void setDelimiter( char c ) { delimiterRef() = c; }

        virtual bool processArg(int *i, std::vector<std::string>& args) = 0;

        virtual bool operator==(const Arg& a) const;

        const std::string& getFlag() const;

        const std::string& getName() const;

        std::string getDescription() const;

        virtual bool isRequired() const;

        void forceRequired();

        void xorSet();

        bool isValueRequired() const;

        bool isSet() const;

        bool isIgnoreable() const;

        virtual bool argMatches( const std::string& s ) const;

        virtual std::string toString() const;

        virtual std::string shortID( const std::string& valueId = "val" ) const;

        virtual std::string longID( const std::string& valueId = "val" ) const;

        virtual void trimFlag( std::string& flag, std::string& value ) const;

        bool _hasBlanks( const std::string& s ) const;

        void setRequireLabel( const std::string& s );

        virtual bool allowMore();

        virtual bool acceptsMultipleValues();

         virtual void reset();
};

typedef std::list<Arg*>::const_iterator ArgListIterator;

typedef std::vector<Arg*>::const_iterator ArgVectorIterator;

typedef std::list<Visitor*>::const_iterator VisitorListIterator;

/*
 * Extract a value of type T from it's string representation contained
 * in strVal. The ValueLike parameter used to select the correct
 * specialization of ExtractValue depending on the value traits of T.
 * ValueLike traits use operator>> to assign the value from strVal.
 */
template<typename T> void
ExtractValue(T &destVal, const std::string& strVal, ValueLike vl)
{
    static_cast<void>(vl); // Avoid warning about unused vl
    istringstream is(strVal.c_str());

    int valuesRead = 0;
    while ( is.good() ) {
    if ( is.peek() != EOF )
#ifdef TCLAP_SETBASE_ZERO
        is >> std::setbase(0) >> destVal;
#else
        is >> destVal;
#endif
    else
        break;

    valuesRead++;
    }

    if ( is.fail() )
    throw( ArgParseException("Couldn't read argument value "
                 "from string '" + strVal + "'"));


    if ( valuesRead > 1 )
    throw( ArgParseException("More than one valid value parsed from "
                 "string '" + strVal + "'"));

}

/*
 * Extract a value of type T from it's string representation contained
 * in strVal. The ValueLike parameter used to select the correct
 * specialization of ExtractValue depending on the value traits of T.
 * StringLike uses assignment (operator=) to assign from strVal.
 */
template<typename T> void
ExtractValue(T &destVal, const std::string& strVal, StringLike sl)
{
    static_cast<void>(sl); // Avoid warning about unused sl
    SetString(destVal, strVal);
}

//BEGIN Arg.cpp

inline Arg::Arg(const std::string& flag,
         const std::string& name,
         const std::string& desc,
         bool req,
         bool valreq,
         Visitor* v) :
  _flag(flag),
  _name(name),
  _description(desc),
  _required(req),
  _requireLabel("required"),
  _valueRequired(valreq),
  _alreadySet(false),
  _visitor( v ),
  _ignoreable(true),
  _xorSet(false),
  _acceptsMultipleValues(false)
{
    if ( _flag.length() > 1 )
        throw(SpecificationException(
                "Argument flag can only be one character long", toString() ) );

    if ( _name != ignoreNameString() &&
         ( _flag == Arg::flagStartString() ||
           _flag == Arg::nameStartString() ||
           _flag == " " ) )
        throw(SpecificationException("Argument flag cannot be either '" +
                            Arg::flagStartString() + "' or '" +
                            Arg::nameStartString() + "' or a space.",
                            toString() ) );

    if ( ( _name.substr( 0, Arg::flagStartString().length() ) == Arg::flagStartString() ) ||
         ( _name.substr( 0, Arg::nameStartString().length() ) == Arg::nameStartString() ) ||
         ( _name.find( " ", 0 ) != std::string::npos ) )
        throw(SpecificationException("Argument name begin with either '" +
                            Arg::flagStartString() + "' or '" +
                            Arg::nameStartString() + "' or space.",
                            toString() ) );

}

inline Arg::~Arg() { }

inline std::string Arg::shortID( const std::string& valueId ) const
{
    std::string id = "";

    if ( _flag != "" )
        id = Arg::flagStartString() + _flag;
    else
        id = Arg::nameStartString() + _name;

    if ( _valueRequired )
        id += std::string( 1, Arg::delimiter() ) + "<" + valueId  + ">";

    if ( !_required )
        id = "[" + id + "]";

    return id;
}

inline std::string Arg::longID( const std::string& valueId ) const
{
    std::string id = "";

    if ( _flag != "" )
    {
        id += Arg::flagStartString() + _flag;

        if ( _valueRequired )
            id += std::string( 1, Arg::delimiter() ) + "<" + valueId + ">";

        id += ",  ";
    }

    id += Arg::nameStartString() + _name;

    if ( _valueRequired )
        id += std::string( 1, Arg::delimiter() ) + "<" + valueId + ">";

    return id;

}

inline bool Arg::operator==(const Arg& a) const
{
    if ( ( _flag != "" && _flag == a._flag ) || _name == a._name)
        return true;
    else
        return false;
}

inline std::string Arg::getDescription() const
{
    std::string desc = "";
    if ( _required )
        desc = "(" + _requireLabel + ")  ";

//  if ( _valueRequired )
//      desc += "(value required)  ";

    desc += _description;
    return desc;
}

inline const std::string& Arg::getFlag() const { return _flag; }

inline const std::string& Arg::getName() const { return _name; }

inline bool Arg::isRequired() const { return _required; }

inline bool Arg::isValueRequired() const { return _valueRequired; }

inline bool Arg::isSet() const
{
    if ( _alreadySet && !_xorSet )
        return true;
    else
        return false;
}

inline bool Arg::isIgnoreable() const { return _ignoreable; }

inline void Arg::setRequireLabel( const std::string& s)
{
    _requireLabel = s;
}

inline bool Arg::argMatches( const std::string& argFlag ) const
{
    if ( ( argFlag == Arg::flagStartString() + _flag && _flag != "" ) ||
           argFlag == Arg::nameStartString() + _name )
        return true;
    else
        return false;
}

inline std::string Arg::toString() const
{
    std::string s = "";

    if ( _flag != "" )
        s += Arg::flagStartString() + _flag + " ";

    s += "(" + Arg::nameStartString() + _name + ")";

    return s;
}

inline void Arg::_checkWithVisitor() const
{
    if ( _visitor != NULL )
        _visitor->visit();
}

inline void Arg::trimFlag(std::string& flag, std::string& value) const
{
    int stop = 0;
    for ( int i = 0; static_cast<unsigned int>(i) < flag.length(); i++ )
        if ( flag[i] == Arg::delimiter() )
        {
            stop = i;
            break;
        }

    if ( stop > 1 )
    {
        value = flag.substr(stop+1);
        flag = flag.substr(0,stop);
    }

}

inline bool Arg::_hasBlanks( const std::string& s ) const
{
    for ( int i = 1; static_cast<unsigned int>(i) < s.length(); i++ )
        if ( s[i] == Arg::blankChar() )
            return true;

    return false;
}

inline void Arg::forceRequired()
{
    _required = true;
}

inline void Arg::xorSet()
{
    _alreadySet = true;
    _xorSet = true;
}

inline void Arg::addToList( std::list<Arg*>& argList ) const
{
    argList.push_front( const_cast<Arg*>(this) );
}

inline bool Arg::allowMore()
{
    return false;
}

inline bool Arg::acceptsMultipleValues()
{
    return _acceptsMultipleValues;
}

inline void Arg::reset()
{
    _xorSet = false;
    _alreadySet = false;
}

//END Arg.cpp

} //namespace TCLAP

#endif