functors.hpp

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/* If you use this library, you must include dtl.hpp only. */
 
#ifndef DTL_FUNCTORS_H
#define DTL_FUNCTORS_H
 
namespace dtl {
    
    template <typename sesElem, typename stream = ostream >
    class Printer
    {
    public :
        Printer ()            : out_(cout) {}
        Printer (stream& out) : out_(out)  {}
        virtual ~Printer () {}
        virtual void operator() (const sesElem& se) const = 0;
    protected :
        stream& out_;
    };
    
    template <typename sesElem, typename stream = ostream >
    class CommonPrinter : public Printer < sesElem, stream >
    {
    public :
        CommonPrinter  ()            : Printer < sesElem, stream > ()    {}
        CommonPrinter  (stream& out) : Printer < sesElem, stream > (out) {}
        ~CommonPrinter () {}
        void operator() (const sesElem& se) const {
            this->out_ << SES_MARK_COMMON << se.first << endl;    
        }
    };
    
    template <typename sesElem, typename stream = ostream >
    class ChangePrinter : public Printer < sesElem, stream >
    {
    public :
        ChangePrinter  ()            : Printer < sesElem, stream > ()    {}
        ChangePrinter  (stream& out) : Printer < sesElem, stream > (out) {}
        ~ChangePrinter () {}
        void operator() (const sesElem& se) const {
            switch (se.second.type) {
            case SES_ADD:
                this->out_ << SES_MARK_ADD    << se.first << endl;
                break;
            case SES_DELETE:
                this->out_ << SES_MARK_DELETE << se.first << endl;
                break;
            case SES_COMMON:
                this->out_ << SES_MARK_COMMON << se.first << endl;
                break;
            }
        }
    };
    
    template <typename sesElem, typename stream = ostream >
    class UniHunkPrinter
    {
    public :
        UniHunkPrinter  ()            : out_(cout) {}
        UniHunkPrinter  (stream& out) : out_(out)  {}
        ~UniHunkPrinter () {}
        void operator() (const uniHunk< sesElem >& hunk) const {
            out_ << "@@"
                 << " -"  << hunk.a << "," << hunk.b
                 << " +"  << hunk.c << "," << hunk.d
                 << " @@" << endl;
            
            for_each(hunk.common[0].begin(), hunk.common[0].end(), CommonPrinter< sesElem, stream >(out_));
            for_each(hunk.change.begin(),    hunk.change.end(),    ChangePrinter< sesElem, stream >(out_));
            for_each(hunk.common[1].begin(), hunk.common[1].end(), CommonPrinter< sesElem, stream >(out_));
        }
    private :
        stream& out_;
    };
    
    template <typename elem>
    class Compare
    {
    public :
        Compare () {}
        virtual ~Compare () {}
        virtual inline bool impl (const elem& e1, const elem& e2) const {
            return e1 == e2;
        }
    };
}
 
#endif // DTL_FUNCTORS_H