source: source/ariba/Name.h@ 2420

// [License]

// The Ariba-Underlay Copyright

//

// Copyright (c) 2008-2009, Institute of Telematics, UniversitÀt Karlsruhe (TH)

//

// Institute of Telematics

// UniversitÀt Karlsruhe (TH)

// Zirkel 2, 76128 Karlsruhe

// Germany

//

// Redistribution and use in source and binary forms, with or without

// modification, are permitted provided that the following conditions are

// met:

//

// 1. Redistributions of source code must retain the above copyright

// notice, this list of conditions and the following disclaimer.

// 2. Redistributions in binary form must reproduce the above copyright

// notice, this list of conditions and the following disclaimer in the

// documentation and/or other materials provided with the distribution.

//

// THIS SOFTWARE IS PROVIDED BY THE INSTITUTE OF TELEMATICS ``AS IS'' AND

// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OF TELEMATICS OR

// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

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// are those of the authors and should not be interpreted as representing

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// Telematics.

// [License]



#ifndef NAME_H_

#define NAME_H_



#include <iostream>

#include <memory.h>



// forward declaration

namespace ariba { class Name; }



std::ostream& operator<<( std::ostream&, const ariba::Name& );



#include "Identifiers.h"



namespace ariba {



/**

 * This class is a wrapper for canonical names.

 * Currently only human readable names are supported.

 *

 * @author Sebastian Mies <mies@tm.uka.de>

 */

class Name {

        friend std::ostream& operator<<( std::ostream&, const ::ariba::Name& );



private:

        bool _hreadable;

        bool _copy;

        int _length;

        uint8_t* _bytes;



        inline void init(const char* name, int len, bool copy, bool hreadable) {

                if (len == -1)

                        len = strlen(name);



                if (copy) {

                        _bytes = new uint8_t[len];

                        memcpy(_bytes, name, len);

                } else {

                        _bytes = (uint8_t*)name;

                }



                _copy = copy;

                _length = len;

                _hreadable = hreadable;

        }



public:

        static const Name UNSPECIFIED;



public:

        /**

         * Constructs a new, yet unspecified name.

         */

        inline Name() {

                _bytes = NULL;

                _length = 0;

                _copy = false;

                _hreadable = false;

        }



        /**

         * Constructs a new name. If no length is specified, a human-readable

         * name is assumed.

         *

         * @param name The name

         * @param len The optional name length, if binary data is used as name

         * @param copy A flag, whether the name's memory needs to be copied

         */

        inline Name(const char* name, int len = -1, bool copy = false) {

                init(name, len, copy, len == -1);

        }



        /**

         * Constructs a new name out of a human readable string.

         *

         * @param name A human readable name

         */

        inline Name(std::string name) {

                init(name.c_str(), -1, true, true);

        }



        /**

         * The copy constructor.

         */

        inline Name(const Name& name) {

                init((const char*)name.bytes(), name.length(), true, name._hreadable);

        }



        /**

         * Destroys the name and releases underlying memory if this name is a copy.

         */

        inline ~Name() {

                if (_copy) delete _bytes;

        }



        /**

         * Returns the binary bytes of the name

         *

         * @return The binary data

         */

        inline const uint8_t* bytes() const {

                return _bytes;

        }



        /**

         * Returns the length of the name in bytes.

         *

         * @return The length of the name

         */

        inline const size_t length() const {

                return _length;

        }



        /**

         * The common implementation of the "equal" operator.

         */

        inline bool operator==(const Name& name) const {

                if (_bytes == NULL || name._bytes == NULL) return false;

                if (name.length() != length()) return false;

                return (memcmp(name.bytes(), bytes(), length()) == 0);

        }



        /**

         * The common implementation of the "unequal" operator.

         */

        inline bool operator!=(const Name& name) const {

                return !(*this == name);

        }



        /**

         * Returns true, if the name is yet unspecified

         */

        inline bool isUnspecified() {

                return *this == UNSPECIFIED;

        }



        /**

         * Returns a random name.

         */

        inline static Name random() {

                char name[17];

                for (int i=0;i<16; i++)

                        name[i] = ("abcdefghijklmnopqrstuvwxyz")[((unsigned)rand())%26];

                name[16] = 0;

                return Name(name);

        }



        /**

         * Returns a human-readable representation of this name

         */

        inline std::string toString() const {

                if (_hreadable) {

                        char str[256];

                        for (int i=0; i<length(); i++) str[i] = bytes()[i];

                        str[length()] = 0;

                        return std::string(str);

                } else {

                        return std::string("<not readable>");

                }

        }



        // hack: to be changed!

        inline NodeID toNodeId() const {

                return NodeID::sha1( bytes(), length() );

        }



        // hack: to be changed!

        inline SpoVNetID toSpoVNetId() const {

                return SpoVNetID::sha1(bytes(), length() );

        }

};



} // namespace ariba



#endif /* NAME_H_ */