option.h

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#ifndef OPTION_H
#define OPTION_H


#include <jwsc++/config.h>

#include <iostream>
#include <list>

#include "jwsc++/base/exception.h"


using std::istream;
using std::ostream;
using std::list;


namespace jwscxx {
namespace base {


class Option
{
    public:

        Option(char s_name, const char* l_name, const char* desc) 
            throw (Arg_error);


        virtual ~Option() { }


        virtual int process(int argc, char** argv) const 
            throw (Arg_error) = 0;


        virtual void print(ostream& out, int width) const throw (Arg_error) = 0;


    protected:

        bool is_s_name_option(const char* arg) const;


        bool is_l_name_option(const char* arg) const;


    protected:

        char s_name;

        const char* l_name;

        const char* desc;
};




class Option_with_arg : public Option
{
    public:

        Option_with_arg
        (
            char        s_name, 
            const char* l_name, 
            const char* desc,
            void (*func)(const char* arg) throw (Arg_error)
        ) 
        throw (Arg_error);


        int process(int argc, char** argv) const throw (Arg_error);


        void print(ostream& out, int width) const throw (Arg_error);


    protected:

        const char* get_l_name_arg(const char* str) const;


    protected:

        void (*func)(const char* arg) throw (Arg_error);
};




class Option_no_arg : public Option
{
    public:

        Option_no_arg
        (
            char        s_name, 
            const char* l_name, 
            const char* desc,
            void (*func)(void)
        ) 
        throw (Arg_error);


        int process(int argc, char** argv) const throw (Arg_error);


        void print(ostream& out, int width) const throw (Arg_error);


    protected:

        void (*func)(void);
};




class Options
{
    public:

        Options() : opts() { }


        ~Options();


        void add(Option* opt);


        int process(int argc, char** argv) const throw (Arg_error);


        void process(const char* fname) const throw (IO_error, Arg_error);


        void process(istream& in) const throw (Arg_error);


        void print(ostream& out=cerr, int width=20) const;


    private:

        bool is_an_option(const char* arg) const;

        list<Option *> opts;
};


}}


#endif