commandlineparser.h

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#pragma once

/*+
________________________________________________________________________

 (C) dGB Beheer B.V.; (LICENSE) http://opendtect.org/OpendTect_license.txt
 Author:        K. Tingdahl
 Date:          March 2013
________________________________________________________________________



-*/

#include "genc.h"
#include "bufstringset.h"
#include "typeset.h"
#include "debug.h" // easier for test programs, declares od_init_test_program

mExpClass(Basic) CommandLineParser
{
public:
                                CommandLineParser(const char*);
                                CommandLineParser(int argc,char** argv);
                                CommandLineParser();
    void                        setKeyHasValue(const char* key,int nrvals=1);
    void                        getNormalArguments(BufferStringSet&) const;
    bool                        hasKey(const char*) const;
    bool                        getVal(const char* key,BufferString&,
                                       bool acceptnone=false,int valnr=1) const;
    template <class T> bool     getVal(const char* key,T&,
                                       bool acceptnone=false,int valnr=1) const;
    bool                        isPresent(const char*) const;

    int                         nrArgs() const          { return argv_.size(); }
    bool                        isKey(int) const;
    bool                        isKeyValue(int idx) const;
    const OD::String&           getArg(int idx) const   { return *argv_[idx]; }
    const OD::String&           lastArg() const;

    const OD::String&           getExecutable() const;
    const OD::String&           getExecutableName() const;

    static void                 createKey(const char* key,BufferString& res)
                                { res = "--"; res += key; }
    static void                 addKey(const char* key,BufferString& cmd,
                                       const char* valstr=0);
    static void                 addFilePath(const char*,BufferString& cmd);
private:

    int                         indexOf(const char*) const;
    void                        init(int,char**);
    void                        init(const char*);

    BufferString                progname_;
    BufferString                executable_;
    BufferStringSet             argv_;

    BufferStringSet             keyswithvalue_;
    TypeSet<int>                nrvalues_;
};

//Implementation

template <class T> inline
bool CommandLineParser::getVal( const char* key, T& val,
                                bool acceptnone, int valnr ) const
{
    const int keyidx = indexOf( key );
    if ( keyidx<0 )
        return acceptnone;

    const int validx = keyidx + mMAX(valnr,1);
    if ( !argv_.validIdx( validx ) || isKey(validx) )
        return false;

    return getFromString( val, argv_[validx]->buf(), mUdf(T) );
}